|Sky/Weather||Cloud cover (% of sky covered) and weather phenomena forecast during the period.
Areal Coverage Descriptions:
Isolated = less than 15%
Widely Scattered = 15-24%
Scattered = 25-54%
Numerous/Widespread = 55-100%
|Max Temperature||The highest temperatures (°F) expected during the forecast period.|
|Min Temperatures||The loweest temperatures (°F) expected during the forecast period.|
|Max Humidity||The highest relative humidity (%) expected during the forecast period.|
|Min Humidity||The lowest relative humidity (%) expected during the forecast period.|
|20-Foot Wind||The average 10-minute wind speed (mph) and direction 20-feet above the vegetation.|
|Ridge Top Wind||The average 10-minute wind speed (mph) and direction 20-feet above the local higher terrain (hill, butte, peak, etc.).|
|LAL||Lightning Activity Level:
1 - No Thunderstorms
2 - Isolated Thunderstorms - single cell, LT 20 strikes/hour, LT 20 total strikes.
3 - Widely Scattered Thunderstorms - up to 70 strikes/hour, 20-40 total strikes
4 - Scattered Thunderstorms - 25-130 strikes/hour, 40-80 total strikes
5 - Widespread, numerous Thunderstorms - 75-300 strike/hour, 80-160 total strikes.
6 - Dry Lightning Outbreak - generally high-based dry thunderstorms, at least widely scattered in coverage, up to 70 strikes/hour, up to 40 total strikes.
|Chc of Wetting Rain||The chance of rainfall exceeding 0.10 inches.|
|Transport Wind||Average wind speed (mph) and direction in the mixing layer (surface to mixing height).|
|Mixing Height||Depth of the mixing layer (feet above ground level).|
|Smoke Dispersal||Excellent - 150,000 knot-feet and greater
Very Good - 100,000 to 149,999 kt-ft
Good - 60,000 to 99,999 kt-ft
Fair - 40,000 to 59,999 kt-ft
Poor - Less than 40,000 kt-ft
|Haines Index||Lower Atmospheric Stability Index. The potential for the growth of large, plume-dominated fires. Scale ranges from 2 (very low) to 6 (high). High level Haines is used in WFO Riverton products.|