@ FNUS75 KTFX 191027 FWSTFX Spot Forecast for Jericho Creek Fire...USFS National Weather Service Great Falls MT 427 AM MDT Tue May 19 2026 Forecast is based on forecast start time of 0600 MDT on May 19. If conditions become unrepresentative...contact the National Weather Service. .DISCUSSION... Unsettled northwest flow will help to maintain daily chances for precipitation across the Continental Divide, with the best opportunity for wetting precipitation arriving late Wednesday morning and persisting through Thursday morning. Over this timeframe there is an 80% chance for 0.1" of precipitation, with a 60% chance for 0.25". Falling snow levels will allow some of this precipitation to fall in the form of snow, especially from Wednesday night through Thursday morning. While gusty and erratic winds are possible near shower activity the probability for wind gusts in excess of 25 mph today, Wednesday, and Thursday are a 25%, 45%, and 15% chance respectively. .TODAY... Sky/weather.........Mostly sunny (40-50 percent) then becoming mostly cloudy (70-80 percent). Slight chance of rain early in the afternoon. Chance of snow and rain late in the afternoon. CWR.................5 percent. Chance of thunder...7 percent. Max temperature.....50-55. Min humidity........34-39 percent. Wind (20 ft)........ Slope/valley.......West winds 5 to 10 mph. Ridgetop...........West around 10 to 15 mph. Mixing height.......6500 ft AGL. Transport winds.....West 10 to 15 mph. TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky (%).........28 41 26 37 48 59 49 56 64 62 66 73 Weather cov..... SCH SCH SCH CHC CHC CHC Weather type.... RN RN RN RS RS RN Tstm cov........ CWR.............0 0 0 0 0 0 10 10 10 10 10 10 Chc of thdr (%).0 0 0 0 0 0 10 10 10 10 10 10 Temp............25 28 32 37 42 45 47 49 49 50 51 52 RH..............77 69 59 52 48 45 43 41 40 39 38 37 20 FT wind dir..W W W W W W W W W W W W 20 FT wind spd..5 5 5 10 10 10 10 10 10 10 10 10 20 FT wind gust.10 10 15 15 15 15 20 15 20 20 20 20 Ridge wind dir..W W W W W W W W W W W W Ridge wind spd..15 15 15 15 15 15 15 15 15 15 15 15 Mix hgt (kft)...0.5 0.5 2.0 3.0 4.0 5.0 6.0 6.5 6.5 6.5 6.5 5.5 Transp wind dir.W W W W W W W W W W W W Transp wind spd.10 10 15 15 15 15 15 15 15 15 15 15 .TONIGHT... Sky/weather.........Mostly cloudy (55-65 percent) then becoming partly cloudy (35-45 percent). Slight chance of rain early in the evening. CWR.................5 percent. Chance of thunder...0 percent. Min temperature.....29-34. Max humidity........78-83 percent. Wind (20 ft)........ Slope/valley.......West winds 5 to 10 mph shifting to the southwest in the late evening and overnight. Ridgetop...........West 15 to 20 mph. Mixing height.......500 ft AGL. Transport winds.....West 10 to 15 mph. TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM Sky (%).........61 43 38 33 54 59 62 67 55 61 57 33 Weather cov.....SCH SCH SCH SCH Weather type....RN RN RN RN Tstm cov........ CWR.............10 10 10 10 10 10 0 0 0 0 0 0 Chc of thdr (%).0 0 0 0 0 0 0 0 0 0 0 0 Temp............50 49 46 41 38 37 36 35 34 33 33 32 RH..............40 44 53 64 69 74 77 76 78 80 81 80 20 FT wind dir..NW W W W SW SW SW SW SW W SW SW 20 FT wind spd..10 10 5 5 5 5 5 5 5 5 5 5 20 FT wind gust.15 15 15 10 10 10 10 10 10 10 10 10 Ridge wind dir..W W W NW W W W W W W W W Ridge wind spd..15 15 15 20 20 20 20 20 20 15 20 20 Mix hgt (kft)...5.0 4.0 2.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 Transp wind dir.W W W W W W W W W W W W Transp wind spd.15 15 15 10 10 10 10 10 15 15 15 15 .WEDNESDAY... Sky/weather.........Partly sunny (65-75 percent) then becoming cloudy (85-95 percent). Rain showers and slight chance of thunderstorms in the afternoon. CWR.................5 percent increasing to 25 percent in the afternoon. Chance of thunder...13 percent. Max temperature.....50-55. Min humidity........42-47 percent. Wind (20 ft)........ Slope/valley.......West winds 5 to 10 mph shifting to the northwest late in the afternoon. Gusty and erratic winds expected near thunderstorms late in the afternoon. Ridgetop...........West 15 to 20 mph. Mixing height.......8500 ft AGL. Transport winds.....West 15 to 20 mph. TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky (%).........68 68 68 68 68 68 68 68 68 88 88 88 Weather cov..... SCH SCH CHC CHC LKY DEF Weather type.... RN RN RN RW RW RW Tstm cov........ SCH SCH SCH CWR.............10 10 10 10 10 10 30 30 30 30 30 30 Chc of thdr (%).0 0 0 0 0 0 10 10 10 10 10 10 Temp............31 34 37 41 45 47 49 50 50 51 49 49 RH..............83 74 65 57 53 50 48 46 47 47 50 53 20 FT wind dir..W W W W W W W W W NW NW NW 20 FT wind spd..5 5 5 10 10 10 10 10 10 10 10 10 20 FT wind gust.10 10 10 15 15 15 20 20 20 20 20 20 Ridge wind dir..W W W W W W W W W W W NW Ridge wind spd..20 20 20 20 15 15 15 15 15 15 15 15 Mix hgt (kft)...0.5 1.0 3.0 4.0 4.5 5.5 5.5 8.0 8.5 6.5 7.5 5.0 Transp wind dir.W W W W W W W W W W W W Transp wind spd.15 15 15 15 20 20 20 15 15 20 20 15 $$ Forecaster...Moldan Requested by...Will menning Type of request...WILDFIRE .TAG 2613863.2/TFX .DELDT 05/19/26 .FormatterVersion 2.0.0 .EMAIL megan.nolte@usda.gov,MTHDC@firenet.gov,scott.nelson@dnr.wa.gov,william.menning@usda.gov, tfx.ops@noaa.gov