####018003405#### FNUS75 KBYZ 032221 FWSBYZ Spot Forecast for South Stocker RX...USFS National Weather Service Billings MT 421 PM MDT Fri May 3 2024 Forecast is based on ignition time of 0900 MDT on May 04. If conditions become unrepresentative...contact the National Weather Service. Please contact our office if you have questions or concerns with this forecast. .DISCUSSION... ...Gusts to 40 mph with RH around 20% Sunday... Mostly sunny and dry Saturday with increasing high clouds for the afternoon. Southeast winds will prevail but should stay below 15mph on the burn site. RH values drop to around 20 percent in the afternoon with temperatures in the low to mid 60s. Mostly clear and dry Saturday night, with winds turning to the south and remaining elevated through the night, especially at and just above ridgetop elevations. These gusty winds just off the surface may keep any remaining fire aggitated overnight. Starting off Sunny Dry and Breezy Sunday. Inversion should break around 11am dropping RH values toward 20 percent and increasing southerly wind gusts into the 35 to 40 mph range for the afternoon (25% chance for a gust over 45mph). The strongest winds look to be around 3pm. Clouds will be on the increase Sunday afternoon and will be of the thicker variety. Chambers .SATURDAY... Sky/weather.........Sunny with increasing high clouds in the afternoon (up to 30% coverage by 5pm). CWR.................0 percent. LAL.................1...no thunderstorms. Max temperature.....62-66. Min humidity........19-23 percent. Wind (20 ft)........ Slope/valley.......Southeast winds 7 to 14 mph. Ridgetop...........southeast around 11 mph. Mixing height.......2800 ft AGL early in the morning increasing to 7500 ft AGL in the afternoon. Transport winds.....South around 13 mph. Haines index........3. .SATURDAY NIGHT... Sky/weather.........Mostly clear. CWR.................0 percent. LAL.................1...no thunderstorms. Min temperature.....40-44. Max humidity........58-62 percent. Wind (20 ft)........ Slope/valley.......Southeast winds 8 to 16 mph. Ridgetop...........Southeast around 20 mph. Mixing height.......7000 ft AGL early in the evening decreasing to 400 ft AGL overnight. Transport winds.....Southeast around 20 mph. .SUNDAY... Sky/weather.........Mostly sunny in the morning with increasing clouds in the afternoon (50% by 5pm). CWR.................0 percent. LAL.................1...no thunderstorms. Max temperature.....76-80. Min humidity........20-24 percent. Wind (20 ft)........ Slope/valley.......South winds 10 to 15 mph in the morning. Becoming South 15 to 25 mph with gusts to 37 mph after 11am. Strongest gusts around 3pm. Ridgetop...........South around 23 mph. Mixing height.......500 ft AGL early in the morning increasing to 9900 ft AGL in the afternoon. Transport winds.....South around 30 mph. Haines index........4. $$ Forecaster...Chambers Requested by...Cody S Phillips Type of request...PRESCRIBED .TAG 2412752.4/BYZ .DELDT 05/03/24 .FormatterVersion 2.0.0 .EMAIL cody.phillips2@usda.gov