Introduction

Welcome to the Iteris ClearAg Map Overlay API. Using the same state-of-the-art scientific and computing technologies as the Field Weather API, Iteris generates map overlays of observed and forecast radar imagery, temperature, humidity, wind speeds, and more.

Please note that before users can access the ClearAg Map Overlay API, an active account and license key is required. These credentials will be provided for each service request. To obtain your API key, contact your Iteris account representative.

API Services

Through the ClearAg Map Overlay API, users have access to tile-based, spatial imagery. Two API endpoints are provided through this service – Tile Layer Index Request and Tile Request. The Tile Layer Index Request endpoint provides a summary of tile layers available for a span of time and a URL from which to request layer tiles. The Tile Request endpoint, in conjunction with a tiling map client (i.e. Google Maps), provides tile-based imagery of a requested layer.

Please note that the availability of various layers provided by this service are subject to external disruptions. It is the responsibility of consuming applications to handle situations where layers are not reported as being available by the Tile Layer Index Request.

Please note that API responses are currently only provided in English.

Additional API information, such as details on legend values and map layers, is available in the Supplementary API Information section of the Appendix.

1. Tile Layer Index Request - v1.0

The Tile Layer Index Request endpoint provides a summary of available layers grouped by display intervals. A display interval in this context refers to the time period for which given layers are valid for display.

1.1. URL Description

http://tiles.clearapis.com/v1.0/layer_index?app_id={string}&app_key={string}
&display_start={Epoch timestamp (seconds)}&display_range={integer}
&display_interval={integer}&layer_filter={string}

1.2. Request Parameters

Parameter Type Required Description

app_id

string

yes

API ID provided by Iteris.

app_key

string

yes

API key provided by Iteris.

display_start

Epoch timestamp (seconds)

no

The requested Epoch timestamp from which display intervals begin. The default is the beginning of the most recent 5-minute interval. If provided, this entry will be truncated to the most recent 5-minute interval. “Display_start” parameter requests are limited to 25 hours prior and 49 hours after the current Epoch time.2

display_range

integer

no

The number of display intervals generated. The default is 1, with a minimum of 1 and a maximum of 24.

display_interval

integer

no

The length of each display interval, in seconds. The default setting is 3600. The minimum is 300 and the maximum is 3600.

layer_filter

string

no

Comma-delimited list of requested layers. By default, all available layers for a time period are returned.1

1 Some layers may be inaccessible. Please contact your Iteris representative about obtaining access to additional layers.

2 Please refer to the Epoch/Unix Timestamp section of the Appendix for Iteris’ definition of Epoch/Unix timestamp.

1.3. Response Object (JSON)

The response object contains a summary of layers available at each display interval grouped by geographical areas of coverage (bounding boxes). These geographical areas are referred to as “domains.” Descriptions of key properties are provided below.

Field Description

display_time

Epoch timestamp for which the results are valid.2

domain_extents

Bounding box describing coordinates for which a domain is relevant. Currently, coordinates are in latitude and longitude with lower-left and upper-right coordinate pairs provided.

valid_time

Epoch timestamp for which a layer is valid.2

tile_url

URL component used with a tiling client to specify tile paths.

layer_type

File extension to be used when requesting tiles. Currently, only “png” is returned.

2 Please refer to the Epoch/Unix Timestamp section of the Appendix for Iteris’ definition of Epoch/Unix timestamp.

1.4. Available Layers

The following is a list of currently supported layers, as of the time of publication. To reduce the size of the index response, users may filter out unwanted layers by providing a comma-delimited list of desired layer names. Providing no list returns all available layers.

Please note that although all default layers can be returned, users may only be able to request tiles for layers in which the given account allows. Also note that some layers are not available for some domains.

Layer timing information is given with respect to the layer valid time provided in the response. For example, in the case of the precip_acc_next_24hr layer, the data are valid for the 24-hour period starting with the layer valid time.

Layer Description Legend(s)

air_temp

Air temperature in degrees Fahrenheit. Recent history, current conditions, and forecasts available.

Temperature

air_temp_max_last_24hr

Maximum air temperature within the past 24 hours, in degrees Fahrenheit.

Temperature

air_temp_min_last_24hr

Minimum air temperature within the past 24 hours, in degrees Fahrenheit.

Temperature

dew_point

Dew point temperature in degrees Fahrenheit. Recent history, current conditions, and forecasts available.

Temperature

hail

Likelihood of hail over the past hour.

Hail Probability

hail_last_24hr

Likelihood of hail over the past 24 hours.

Hail Probability

precip_acc_1hr

Amount of liquid-equivalent precipitation in inches accumulating within the past hour. Recent history, current conditions, and forecasts available.

Hourly Precipitation

precip_acc_last_24hr

Amount of liquid-equivalent precipitation in inches accumulating within the past 24 hours.

Precipitation

precip_acc_next_24hr

Amount of liquid-equivalent precipitation in inches forecasted to accumulate within the next 24 hours, with probabilities indicated using various degrees of hatching (e.g., diagonal-hatch pattern).

Precipitation Alerts

precip_prob_next_24hr

Likelihood of precipitation within the next 24 hours.

Precipitation Probability Alerts

precip_start_time_cst6cdt

Start times of precipitation forecasted over the next 24 hours, in the America/Chicago timezone.

Precipitation Start Times

precip_start_time_est6edt

Start times of precipitation forecasted over the next 24 hours, in the America/New York timezone.

Precipitation Start Times

precip_start_time_ mst6mdt

Start times of precipitation forecasted over the next 24 hours, in the America/Denver timezone.

Precipitation Start Times

radar

Radar imagery indicating both precipitation intensity and type. Color shading belonging to the “Freezing Precipitation” legend denotes areas of freezing rain or drizzle; colors belonging to the “Liquid Precipitation” legend denote areas of non-freezing rain or drizzle; colors belonging to the “Sleet & Snow” legend denote areas of frozen precipitation including ice pellets or snow; and colors belonging to the “Wintry Mix” legend indicate a mix of any of the other types. Not available for forecast timeframes.

Radar / Reflectivity & Type

radar_with_forecast

Same as “radar” layer, but with the addition of forecasts of precipitation characteristics. Forecast precipitation intensity and type are indicated with colors, similar to the “radar” layer, with precipitation coverage/probability indicated using various degrees of hatching (e.g., diagonal-hatch pattern). Note that the “radar” layer legend is applicable for non-forecast timeframes.

Radar / Reflectivity & Type, Radar / Forecast Type & Probability

radar_with_metrad_plus

Same as “radar_with_forecast,” but with the first two hours of the forecast timeframe instead filled with projections of precipitation based on Lagrangian extrapolation of the motion of precipitation indicated in the current radar image. Note that the “radar” layer legend is applicable for all timeframes except for forecast lead times greater than two hours.

Radar / Reflectivity & Type, Radar / Forecast Type & Probability

relative_humidity

Relative humidity in percent. Recent history, current conditions, and forecasts available.

Relative Humidity

satellite_infrared

Infrared satellite imagery, which provides information about relative cloud-top brightness temperatures. Recent history, current conditions, and forecasts available. Note that providing a future time returns a cloud amount forecast, which does not directly compare to satellite imagery.

N/A

satellite_visible

Visible satellite imagery, which provides information about daytime cloud cover extent, snow cover, etc. Recent history, current conditions, and forecasts available. Note that providing a future time returns a cloud amount forecast, which does not directly compare to satellite imagery.

N/A

satellite_watervapor

Water vapor imagery produced by satellite, which provides information about air mass moisture content, rendered as brightness temperature. Recent history, current conditions, and forecasts available. Note that providing a future time returns a cloud amount forecast, which does not directly compare to satellite imagery.

N/A

snow_acc_1hr

Amount of snow in inches accumulating within the past hour. Recent history, current conditions, and forecasts available.

Hourly Snow

snow_acc_last_24hr

Amount of snow in inches accumulating within the past 24 hours.

Snow

snow_acc_next_24hr

Amount of snow in inches forecasted to accumulate within the next 24 hours, with probabilities indicated using various degrees of hatching (e.g., diagonal-hatch pattern).

Snow Alerts

soil_moisture

Volumetric soil moisture in percent for the 2-5 cm layer. Recent history and current conditions available.

Soil Moisture

soil_temp

Soil temperature in degrees Fahrenheit for the 2-5 cm layer. Recent history and current conditions available.

Temperature

visibility

Visibility in miles. Recent history, current conditions, and forecasts available.

Visibility

visibility_min_next_24hr

Minimum visibility in miles forecasted over the next 24 hours.

Visibility Alerts

wind_gusts

Wind gust speed in miles per hour. Recent history, current conditions, and forecasts available.

Wind Speeds

wind_speed

Sustained wind speed in miles per hour. Recent history, current conditions, and forecasts available.

Wind Speeds

wind_speed_max_next_ 24hr

Maximum wind speed in miles per hour forecasted over the next 24 hours.

Wind Speed Alerts

1.5. Example Request

http://tiles.clearapis.com/v1.0/layer_index?app_id=123&app_key=123&display_range=2
&display_interval=1200&layer_filter=air_temp,wind_speed,precip_acc_1hr

1.6. Example Response

{
    "domain_extents":{
        "contigus":[[21.891372,-128.18741],[51.616717,-64.812589]],
        "global":[[-90,-180],[90,180]]
    },
    "display_intervals":[
        {
            "display_time":1410546900,
            "layers":{
                "contigus":{
                    "air_temp":{
                        "valid_time":1410544800,
                        "layer_type":"png",
                        "tile_url":"http://tiles.clearapis.com/v1.0/gmaps/air_temp/29518/"
                    },...
                },
                "global":{
                    "wind_speed":{
                        "valid_time":1410541200,
                        "layer_type":"png",
                        "tile_url":"http://tiles.clearapis.com/v1.0/gmaps/wind_speed/29233/"
                    },...
                }
            }
        },...
    ]
}

2. Tile Request - v1.0

The Tile Request endpoint provides the appropriate tiled image, given the tile coordinates and zoom level generated by a tiling client. The pixel dimension of each image tile returned is 256 x 256.

2.1. URL Description

http://tiles.clearapis.com/v1.0/{format}/{map tile base url provided by layer index}/{first_coord}/{second_coord}/{third_coord}.{extension}?app_id={string}
&app_key={string}

2.2. Request Parameters

Parameter Type Required Description

app_id

string

yes

API ID provided by Iteris.

app_key

string

yes

API key provided by Iteris.

format

string

yes

Maps to the tiling protocol. Currently only “gmaps” is supported.

Map tile base url provided by layer index

string

yes

Contains both the requested layer name and file ID.

first_coord, second_coord, third_coord

integer

yes

Zoom, X, and Y coordinates, respectively, for a given tile.

extension

string

yes

File extension. Currently, only “png” is supported.

These are not latitude or longitude x and y values. For more information please visit slippy_maps wiki.

2.3. Response Object (Image)

The response object will provide binary image data that may be loaded as an image using either the HTML <img> element or using any number of proprietary image handling libraries. For example, images can be accessed using UIImage in Cocoa and/or ImageView in the Android SDK.

2.4. Example Request

http://tiles.clearapis.com/v1.0/gmaps/dew_point/29522/5/5/14.png?app_id=123
&app_key=123

2.5. Example Responses

Map Overlay Image

2.6. 2.6 Example Layer Request and Tile Request Code

py_ex.py
  import requests
  import ujson
  import shutil

  r = requests.get("http://tiles.clearapis.com/v1.0/layer_index?app_id={string}&app_key={string}\
  &display_start={Epoch timestamp (seconds)}&display_range={integer}&display_interval={integer}")
  data = ujson.loads(r.text)

  # The code below selects the contig_us radar tile for the first display interval returned
  radarTile = data["display_intervals"][0]["layers"]["contigus"]["radar"]["tile_url"] + "0/0/0.png"

  tile = requests.get(radarTile, stream=True)
  if tile.status_code == 200:
      with open({path}, 'wb') as f:
          tile.raw.decode_content = True
          shutil.copyfileobj(tile.raw, f)
  else:
    print("Tile Request Failed.")

Appendix

Appendix A: Supplementary API Information

A.1. Common HTTP response codes

The following are common HTTP response codes and their meanings. These are standard across all API services.

  • 200 OK - The request was successful.

  • 400 Bad Request - The request was invalid. An accompanying error message will be provided if available.

  • 401 Unauthorized - Authentication to the API has failed. Authentication credentials are missing or incorrect.

  • 403 Forbidden - You are trying to access a resource for which you do not have the appropriate privileges.

  • 404 Not found - The requested resource was not found. An accompanying error message will be provided if available.

  • 500 Internal Server Error - An internal server error has occurred while processing the request.

  • 502 Bad Gateway - The service is not reachable.

A.2. Null or Empty Values

In some cases values will be represented as “n/a.” This indicates that the requested data is not available or is not applicable.

A.3. Epoch/Unix Timestamp

Iteris employs Epoch/Unix timestamps for time-based parameters. This system works by defining situations in time by the number of seconds since 1970-01-01 00:00 Coordinated Universal Time (UTC).

Appendix B: Layer Legend Data

This section contains legend data for each layer type. The following tables include listings of legend values and corresponding RGB values.

B.1. Hail Probability

R Value G Value B Value Color Legend Value

255

255

0

255 255 0

Minimal

255

232

0

255 232 0

Minimal

255

210

0

255 210 0

Minimal

255

187

0

255 187 0

Minimal

255

165

0

255 165 0

Minimal

255

143

0

255 143 0

Slight

247

114

0

247 114 0

Slight

239

85

0

239 85 0

Slight

231

57

0

231 57 0

Slight

223

28

0

223 28 0

Slight

215

0

0

215 0 0

Possible

223

0

51

223 0 51

Possible

231

0

102

231 0 102

Possible

239

0

153

239 0 153

Possible

247

0

204

247 0 204

Possible

255

0

255

255 0 255

Likely

235

17

244

235 17 244

Likely

215

34

234

215 34 234

Likely

195

52

223

195 52 223

Likely

175

69

213

175 69 213

Likely

155

87

203

155 87 203

Severe

164

109

202

164 109 202

Severe

173

132

201

173 132 201

Severe

182

154

201

182 154 201

Severe

191

177

200

191 177 200

Severe

200

200

200

200 200 200

Extreme

B.2. Hourly Precipitation

R Value G Value B Value Color Legend Value (in)

136

192

200

136 192 200

T

120

168

200

120 168 200

0.005

104

144

200

104 144 200

0.01

104

156

232

104 156 232

0.02

72

124

250

72 124 250

0.03

8

28

250

8 28 250

0.04

56

250

40

56 250 40

0.05

28

187

20

28 187 20

0.06

0

124

0

0 124 0

0.07

75

161

0

75 161 0

0.08

175

212

0

175 212 0

0.09

250

250

0

250 250 0

0.10

249

231

0

249 231 0

0.11

249

213

0

249 213 0

0.12

248

194

0

248 194 0

0.13

248

176

0

248 176 0

0.14

248

158

0

248 158 0

0.15

248

146

0

248 146 0

0.16

248

134

0

248 134 0

0.17

249

123

0

249 123 0

0.18

249

111

0

249 111 0

0.19

250

100

0

250 100 0

0.20

200

50

0

200 50 0

0.225

150

0

0

150 0 0

0.25

175

5

0

175 5 0

0.275

200

10

0

200 10 0

0.30

212

8

0

212 8 0

0.325

225

5

0

225 5 0

0.35

238

3

0

238 3 0

0.375

250

0

0

250 0 0

0.40

224

0

46

224 0 46

0.425

197

0

92

197 0 92

0.45

171

0

138

171 0 138

0.475

145

0

185

145 0 185

0.50

159

5

178

159 5 178

0.55

173

10

171

173 10 171

0.60

187

15

164

187 15 164

0.65

201

20

157

201 20 157

0.70

215

25

150

215 25 150

0.75

223

20

171

223 20 171

0.80

231

15

192

231 15 192

0.85

239

10

213

239 10 213

0.90

247

5

234

247 5 234

0.95

255

0

255

255 0 255

1.00+

B.3. Hourly Snow

R Value G Value B Value Color Legend Value (in)

136

192

200

136 192 200

T

104

144

200

104 144 200

0.2

104

156

232

104 156 232

0.4

72

124

250

72 124 250

0.6

8

28

250

8 28 250

0.8

56

250

40

56 250 40

1.0

0

124

0

0 124 0

1.25

250

250

0

250 250 0

1.50

248

158

0

248 158 0

1.75

250

100

0

250 100 0

2.00

150

0

0

150 0 0

2.25

200

10

0

200 10 0

2.50

250

0

0

250 0 0

2.75

145

0

185

145 0 185

3.00

215

25

150

215 25 150

3.50

255

0

255

255 0 255

4.00+

B.4. Precipitation

R Value G Value B Value Color Legend Value (in)

180

195

210

180 195 210

T

150

185

210

150 185 210

0.01

120

170

220

120 170 220

0.02

105

155

225

105 155 225

0.03

90

140

230

90 140 230

0.04

75

115

235

75 115 235

0.05

50

85

250

50 85 250

0.06

35

55

252

35 55 252

0.07

20

30

255

20 30 255

0.08

0

255

0

0 255 0

0.10

0

240

0

0 240 0

0.12

4

225

4

4 225 4

0.15

8

195

8

8 195 8

0.20

12

165

12

12 165 12

0.25

16

130

16

16 130 16

0.30

85

170

33

85 170 33

0.35

155

205

50

155 205 50

0.40

205

205

25

205 205 25

0.45

255

255

0

255 255 0

0.50

252

235

0

252 235 0

0.60

250

215

0

250 215 0

0.70

247

190

0

247 190 0

0.80

247

175

0

247 175 0

0.90

245

160

0

245 160 0

1.0

245

130

0

245 130 0

1.1

240

100

0

240 100 0

1.25

150

0

0

150 0 0

1.50

175

0

0

175 0 0

1.75

200

0

0

200 0 0

2.0

225

5

0

225 5 0

2.5

250

10

0

250 10 0

3.0

225

15

60

225 15 60

3.5

212

17

88

212 17 88

4.0

205

20

115

205 20 115

4.5

175

25

150

175 25 150

5.0

145

30

185

145 30 185

6.0

165

60

195

165 60 195

7.0

185

95

205

185 95 205

8.0

220

162

220

220 162 220

9.0

240

130

240

240 130 240

10.0

247

65

245

247 65 245

11.0

255

0

255

255 0 255

12.0

205

0

205

205 0 205

15.0+

B.5. Precipitation Alerts

R Value G Value B Value Color Legend Value (in)

180

195

210

180 195 210

T

150

185

210

150 185 210

0.01

120

170

220

120 170 220

0.02

90

140

230

90 140 230

0.04

50

85

250

50 85 250

0.06

20

30

255

20 30 255

0.08

0

255

0

0 255 0

0.10

4

225

4

4 225 4

0.15

8

195

8

8 195 8

0.20

12

165

12

12 165 12

0.25

16

130

16

16 130 16

0.3

155

205

50

155 205 50

0.4

255

255

0

255 255 0

0.5

250

215

0

250 215 0

0.75

245

165

0

245 165 0

1.0

240

100

0

240 100 0

1.25

150

0

0

150 0 0

1.5

200

0

0

200 0 0

2.0

250

10

0

250 10 0

3.0

205

20

115

205 20 115

4.0

145

30

185

145 30 185

6.0

185

95

205

185 95 205

8.0

240

130

240

240 130 240

10.0

255

0

255

255 0 255

12.0

205

0

205

205 0 205

15.0+

The image below details the different hatching levels used to describe precipitation probabilities.

precip hatch

B.6. Precipitation Probability Alerts

R Value G Value B Value Color Legend Value

0

255

0

0 255 0

None

255

255

0

255 255 0

Slight

255

128

0

255 128 0

Chance

255

0

0

255 0 0

Good Chance

255

0

255

255 0 255

Likely

B.7. Precipitation Start Times

R Value G Value B Value Color Legend Value (hour)

0

70

70

0 70 70

12am

0

100

100

0 100 100

1am

0

130

130

0 130 130

2am

0

160

160

0 160 160

3am

0

190

190

0 190 190

4am

0

220

220

0 220 220

5am

0

250

250

0 250 250

6am

0

250

190

0 250 190

7am

0

250

130

0 250 130

8am

0

250

70

0 250 70

9am

70

250

70

70 250 70

10am

100

250

0

100 250 0

11am

160

250

0

160 250 0

12pm

220

250

0

220 250 0

1pm

250

250

0

250 250 0

2pm

250

230

0

250 230 0

3pm

250

210

0

250 210 0

4pm

250

190

70

250 190 70

5pm

220

170

70

220 170 70

6pm

190

150

70

190 150 70

7pm

160

130

70

160 130 70

8pm

130

110

70

130 110 70

9pm

100

90

70

100 90 70

10pm

70

70

70

70 70 70

11pm

B.8. Radar / Forecast Type & Probability

B.8.1. Freezing Precipitation

R Value G Value B Value Color Legend Value (Intensity)

255

220

220

255 220 220

Very Light

255

172

172

255 172 172

Light

255

124

124

255 124 124

Moderate

255

80

80

255 80 80

Heavy

255

0

0

255 0 0

Very Heavy

B.8.2. Liquid Precipitation

R Value G Value B Value Color Legend Value (Intensity)

0

175

0

0 175 0

Very Light

0

100

0

0 100 0

Light

240

240

0

240 240 0

Moderate

255

135

0

255 135 0

Heavy

175

0

0

175 0 0

Very Heavy

B.8.3. Sleet & Snow

R Value G Value B Value Color Legend Value (Intensity)

0

239

255

0 239 255

Very Light

0

191

255

0 191 255

Light

0

123

255

0 123 255

Moderate

0

38

255

0 38 255

Heavy

0

0

137

0 0 137

Very Heavy

B.8.4. Wintry Mix

R Value G Value B Value Color Legend Value (Intensity)

255

156

255

255 156 255

Very Light

255

0

255

255 0 255

Light

200

0

255

200 0 255

Moderate

128

0

128

128 0 128

Heavy

64

0

64

64 0 64

Very Heavy

The image below details the different hatching levels used to describe precipitation probabilities.

precip hatch

B.9. Radar / Reflectivity & Type

B.9.1. Freezing Precipitation

R Value G Value B Value Color Legend Value (dBZ)

255

220

200

255 220 200

1

255

220

200

255 220 200

3

255

220

200

255 220 200

5

255

213

193

255 213 193

7

255

207

187

255 207 187

9

255

200

180

255 200 180

11

255

194

174

255 194 174

13

255

188

168

255 188 168

15

255

181

161

255 181 161

17

255

175

155

255 175 155

19

255

168

149

255 168 149

21

255

162

143

255 162 143

23

255

156

137

255 156 137

25

255

149

130

255 149 130

27

255

143

123

255 143 123

29

255

136

118

255 136 118

31

255

130

116

255 130 116

33

255

124

114

255 124 114

35

255

117

107

255 117 107

37

255

111

101

255 111 101

39

255

105

95

255 105 95

41

255

100

90

255 100 90

43

255

96

86

255 96 86

45

255

89

83

255 89 83

47

255

83

81

255 83 81

49

255

76

76

255 76 76

51

255

70

70

255 70 70

53

255

64

64

255 64 64

55

255

57

57

255 57 57

57

255

51

51

255 51 51

59

255

44

44

255 44 44

61

255

38

38

255 38 38

63

255

32

32

255 32 32

65

255

25

25

255 25 25

67

255

19

19

255 19 19

69

255

12

12

255 12 12

71

255

6

6

255 6 6

73

255

0

0

255 0 0

75

B.9.2. Liquid Precipitation

R Value G Value B Value Color Legend Value (dBZ)

0

255

128

0 255 128

1

0

255

128

0 255 128

3

0

255

128

0 255 128

5

0

255

76

0 255 76

7

0

255

25

0 255 25

9

0

244

0

0 244 0

11

0

222

0

0 222 0

13

0

200

0

0 200 0

15

0

180

0

0 180 0

17

0

160

0

0 160 0

19

0

140

0

0 140 0

21

0

120

0

0 120 0

23

0

100

0

0 100 0

25

0

80

0

0 80 0

27

0

60

0

0 60 0

29

42

82

0

42 82 0

31

126

146

0

126 146 0

33

210

210

0

210 210 0

35

228

228

0

228 228 0

37

246

246

0

246 246 0

39

255

234

0

255 234 0

41

255

192

0

255 192 0

43

255

150

0

255 150 0

45

255

110

0

255 110 0

47

255

70

0

255 70 0

49

244

40

0

244 40 0

51

222

20

0

222 20 0

53

200

0

0

200 0 0

55

180

0

0

180 0 0

57

160

0

0

160 0 0

59

171

0

51

171 0 51

61

213

0

153

213 0 153

63

255

0

255

255 0 255

65

215

34

234

215 34 234

67

175

69

213

175 69 213

69

167

112

205

167 112 205

71

191

163

210

191 163 210

73

215

215

215

215 215 215

75

B.9.3. Sleet & Snow

R Value G Value B Value Color Legend Value (dBZ)

0

239

255

0 239 255

1

0

239

255

0 239 255

3

0

239

255

0 239 255

5

0

228

255

0 228 255

7

0

217

255

0 217 255

9

0

207

255

0 207 255

11

0

199

255

0 199 255

13

0

191

255

0 191 255

15

0

183

255

0 183 255

17

0

176

255

0 176 255

19

0

168

255

0 168 255

21

0

158

255

0 158 255

23

0

148

255

0 148 255

25

0

138

255

0 138 255

27

0

128

255

0 128 255

29

0

119

255

0 119 255

31

0

111

255

0 111 255

33

0

104

255

0 104 255

35

0

96

255

0 96 255

37

0

88

255

0 88 255

39

0

81

255

0 81 255

41

0

74

255

0 74 255

43

0

67

255

0 67 255

45

0

55

255

0 55 255

47

0

43

255

0 43 255

49

0

33

255

0 33 255

51

0

23

255

0 23 255

53

0

14

255

0 14 255

55

0

8

255

0 8 255

57

0

2

255

0 2 255

59

0

0

248

0 0 248

61

0

0

235

0 0 235

63

0

0

223

0 0 223

65

0

0

215

0 0 215

67

0

0

207

0 0 207

69

0

0

189

0 0 189

71

0

0

163

0 0 163

73

0

0

137

0 0 137

75

B.9.4. Wintry Mix

R Value G Value B Value Color Legend Value (dBZ)

255

179

255

255 179 255

1

255

179

255

255 179 255

3

255

179

255

255 179 255

5

248

176

238

248 176 238

7

242

174

222

242 174 222

9

240

167

211

240 167 211

11

243

157

206

243 157 206

13

247

147

202

247 147 202

15

247

140

200

247 140 200

17

247

134

198

247 134 198

19

243

127

196

243 127 196

21

237

121

192

237 121 192

23

231

115

189

231 115 189

25

231

108

189

231 108 189

27

231

101

189

231 101 189

29

229

94

187

229 94 187

31

225

88

184

225 88 184

33

222

82

181

222 82 181

35

218

75

177

218 75 177

37

215

68

174

215 68 174

39

213

62

170

213 62 170

41

211

57

166

211 57 166

43

209

53

162

209 53 162

45

202

48

158

202 48 158

47

196

44

155

196 44 155

49

193

39

152

193 39 152

51

193

34

148

193 34 148

53

193

30

145

193 30 145

55

187

30

143

187 30 143

57

181

30

141

181 30 141

59

175

28

137

175 28 137

61

170

26

132

170 26 132

63

165

24

128

165 24 128

65

162

20

127

162 20 127

67

160

16

126

160 16 126

69

156

11

123

156 11 123

71

151

5

118

151 5 118

73

147

0

114

147 0 114

75

B.10. Relative Humidity

R Value G Value B Value Color Legend Value (%)

110

35

35

110 35 35

0

130

17

17

130 17 17

2.5

150

0

0

150 0 0

5

175

0

0

175 0 0

7.5

200

0

0

200 0 0

10

225

0

0

225 0 0

12.5

250

0

0

250 0 0

15

250

25

0

250 25 0

17.5

250

50

0

250 50 0

20

250

75

0

250 75 0

22.5

250

100

0

250 100 0

25

250

115

0

250 115 0

27.5

250

130

0

250 130 0

30

250

145

0

250 145 0

32.5

250

160

0

250 160 0

35

250

175

0

250 175 0

37.5

250

190

0

250 190 0

40

250

210

0

250 210 0

42.5

250

230

0

250 230 0

45

141

241

0

141 241 0

47.5

32

252

0

32 252 0

50

16

251

125

16 251 125

52.5

0

250

250

0 250 250

55

12

230

250

12 230 250

57.5

25

210

250

25 210 250

60

25

180

250

25 180 250

62.5

25

150

250

25 150 250

65

25

125

250

25 125 250

67.5

25

100

250

25 100 250

70

24

84

249

24 84 249

72.5

24

68

248

24 68 248

75

64

68

248

64 68 248

77.5

104

68

248

104 68 248

80

136

68

248

136 68 248

82.5

168

68

248

168 68 248

85

188

68

248

188 68 248

87.5

208

68

248

208 68 248

90

198

53

228

198 53 228

92.5

188

38

208

188 38 208

95

178

23

188

178 23 188

97.5

B.11. Snow

R Value G Value B Value Color Legend Value (in)

180

195

210

180 195 210

T

150

185

210

150 185 210

0.1

120

170

220

120 170 220

0.25

90

140

230

90 140 230

0.5

50

85

250

50 85 250

1.0

20

30

255

20 30 255

1.5

0

255

0

0 255 0

2.0

4

225

4

4 225 4

3.0

8

195

8

8 195 8

4.0

12

165

12

12 165 12

5.0

16

130

16

16 130 16

6.0

155

205

50

155 205 50

7.0

255

255

0

255 255 0

8.0

250

215

0

250 215 0

9.0

245

165

0

245 165 0

10.0

240

100

0

240 100 0

11.0

150

0

0

150 0 0

12.0

200

0

0

200 0 0

13.0

250

10

0

250 10 0

15.0

205

20

115

205 20 115

18.0

145

30

185

145 30 185

21.0

185

95

205

185 95 205

24.0

240

130

240

240 130 240

27.0

255

0

255

255 0 255

30.0

205

0

205

205 0 205

36.0+

B.12. Snow Alerts

R Value G Value B Value Color Legend Value (in)

180

195

210

180 195 210

T

150

185

210

150 185 210

0.1

120

170

220

120 170 220

0.25

90

140

230

90 140 230

0.5

50

85

250

50 85 250

1.0

20

30

255

20 30 255

1.5

0

255

0

0 255 0

2.0

4

225

4

4 225 4

3.0

8

195

8

8 195 8

4.0

12

165

12

12 165 12

5.0

16

130

16

16 130 16

6.0

155

205

50

155 205 50

7.0

255

255

0

255 255 0

8.0

250

215

0

250 215 0

9.0

245

165

0

245 165 0

10.0

240

100

0

240 100 0

11.0

150

0

0

150 0 0

12.0

200

0

0

200 0 0

13.0

250

10

0

250 10 0

15.0

205

20

115

205 20 115

18.0

145

30

185

145 30 185

21.0

185

95

205

185 95 205

24.0

240

130

240

240 130 240

27.0

255

0

255

255 0 255

30.0

205

0

205

205 0 205

36.0+

The image below details the different hatching levels used to describe snow probabilities.

precip hatch

B.13. Soil Moisture

R Value G Value B Value Color Legend Value (%)

110

35

35

110 35 35

0.0

200

0

0

200 0 0

2.5

250

50

0

250 50 0

5.0

250

100

0

250 100 0

7.5

250

130

0

250 130 0

10.0

250

160

0

250 160 0

12.5

250

190

0

250 190 0

15.0

250

230

0

250 230 0

17.5

32

252

0

32 252 0

20.0

0

250

250

0 250 250

22.5

25

210

250

25 210 250

20.0

25

150

250

25 150 250

27.5

25

100

250

25 100 250

30.0

24

68

248

24 68 248

32.5

104

68

248

104 68 248

35.0

168

68

248

168 68 248

37.5

208

68

248

208 68 248

40.0

188

38

208

188 38 208

42.5+

B.14. Temperature

R Value G Value B Value Color Legend Value (F)

255

255

255

255 255 255

-40

251

245

251

251 245 251

-37.5

248

236

248

248 236 248

-35

248

224

248

248 224 248

-32.5

248

212

248

248 212 248

-30

248

194

248

248 194 248

-27.5

248

176

248

248 176 248

-25

248

150

248

248 150 248

-22.5

248

124

248

248 124 248

-20

248

96

248

248 96 248

-17.5

248

68

248

248 68 248

-15

198

53

208

198 53 208

-12.5

148

38

168

148 38 168

-10

168

38

188

168 38 188

-7.5

188

38

208

188 38 208

-5

198

53

228

198 53 228

-2.5

208

68

248

208 68 248

0

188

68

248

188 68 248

2.5

168

68

248

168 68 248

5

136

68

248

136 68 248

7.5

104

68

248

104 68 248

10

64

68

248

64 68 248

12.5

24

68

248

24 68 248

15

24

84

249

24 84 249

17.5

25

100

250

25 100 250

20

25

125

250

25 125 250

22.5

25

150

250

25 150 250

25

25

180

250

25 180 250

27.5

25

210

250

25 210 250

30

12

230

250

12 230 250

32.5

0

250

250

0 250 250

35

16

251

125

16 251 125

37.5

32

252

0

32 252 0

40

141

241

0

141 241 0

42.5

250

230

0

250 230 0

45

250

210

0

250 210 0

47.5

250

190

0

250 190 0

50

250

175

0

250 175 0

52.5

250

160

0

250 160 0

55

250

145

0

250 145 0

57.5

250

130

0

250 130 0

60

250

115

0

250 115 0

62.5

250

100

0

250 100 0

65

250

75

0

250 75 0

67.5

250

50

0

250 50 0

70

250

25

0

250 25 0

72.5

250

0

0

250 0 0

75

225

0

0

225 0 0

77.5

200

0

0

200 0 0

80

175

0

0

175 0 0

82.5

150

0

0

150 0 0

85

130

17

17

130 17 17

87.5

110

35

35

110 35 35

90

115

52

52

115 52 52

92.5

120

70

70

120 70 70

95

125

87

87

125 87 87

97.5

130

105

105

130 105 105

100

135

122

122

135 122 122

102.5

140

140

140

140 140 140

105

115

115

115

115 115 115

107.5

90

90

90

90 90 90

110

70

70

70

70 70 70

112.5

50

50

50

50 50 50

115

B.15. Visibility

R Value G Value B Value Color Legend Value (mi)

110

35

35

110 35 35

< 1/4

200

0

0

200 0 0

1/4

250

50

0

250 50 0

1/2

250

130

0

250 130 0

3/4

250

190

0

250 190 0

1

32

252

0

32 252 0

2

25

210

250

25 210 250

5

25

100

250

25 100 250

10

B.16. Visibility Alerts

R Value G Value B Value Color Legend Value

0

255

0

0 255 0

Good

255

255

0

255 255 0

OK

255

0

0

255 0 0

Reduced

255

0

255

255 0 255

Poor

B.17. Wind Speeds

R Value G Value B Value Color Legend Value (mph)

0

250

250

0 250 250

0

12

230

250

12 230 250

2.5

25

210

250

25 210 250

5

25

180

250

25 180 250

7.5

25

150

250

25 150 250

10

24

109

249

24 109 249

12.5

24

68

248

24 68 248

15

12

121

124

12 121 124

17.5

0

175

0

0 175 0

20

16

213

0

16 213 0

22.5

32

252

0

32 252 0

25

141

241

0

141 241 0

27.5

250

230

0

250 230 0

30

250

180

0

250 180 0

32.5

250

130

0

250 130 0

35

252

65

0

252 65 0

37.5

255

0

0

255 0 0

40

251

34

124

251 34 124

45

248

68

248

248 68 248

50+

B.18. Wind Speed Alerts

R Value G Value B Value Color Legend Value (mph)

0

255

0

0 255 0

< 12

255

255

0

255 255 0

12-18

255

0

0

255 0 0

18-24

255

0

255

255 0 255

> 24

Appendix C: Changelog

This section describes document changes occurring in the two most recent versions.