Spot Forecast
Issued by NWS Riverton, WY
Issued by NWS Riverton, WY
626 FNUS75 KRIW 200428 FWSRIW Spot Forecast for CLEARWATER...USFS National Weather Service Riverton WY 1028 PM MDT Fri Jul 19 2024 Forecast is based on forecast start time of 2300 MDT on July 19. If conditions become unrepresentative, contact the National Weather Service .DISCUSSION... Tonight will feature mostly clear skies and a light southwesterly wind. Weak upslope flow will result in a northeast wind of 5-10 mph after sunrise. Convective development will begin around 1000-1100 with building cumulus, then scattered rain showers and thunderstorms will develop by 1200. Showers and storms will remain in the area through the afternoon and some could linger into the evening hours Saturday. Gusty erratic wind will occur with storms Saturday afternoon. Gusts could exceed 50 mph with the strongest storms. ...Thunderstorms imply strong gusty and erratic winds... ...Haines index is high level haines both day and night... .REST OF TONIGHT... Sky/weather.........Mostly clear (10-20 percent). CWR.................0 percent. Chance of pcpn......10 percent. LAL.................1. Min temperature.....Around 56. Max humidity........63 percent. Wind (20 ft)........Light winds. Ridgetop wind.......Northeast around 10 mph until 0400, then west. Mixing height.......2000 ft AGL. Transport winds.....East 8 to 12 mph until 0300, then north around 8 mph until 0400, then west 9 to 10 mph. Smoke dispersal.....Poor. Haines Index........3 to 4. TIME (MDT) 11P MID 1AM 2AM 3AM 4AM 5AM Sky (%).........15 20 15 20 10 10 20 Weather cov..... Weather type.... Tstm cov........ CWR.............0 0 0 0 0 0 0 Chc of pcpn (%).0 0 0 0 10 0 0 LAL.............1 1 1 1 1 1 1 Temp............65 62 61 60 58 58 58 RH..............53 59 61 60 62 62 60 20 FT wind dir..E SE E N N W SW 20 FT wind spd..3 6 4 3 3 4 5 20 FT wind gust.6 7 6 5 4 6 6 Ridge wind dir..E SE E N N W SW Ridge wind spd..10 10 10 10 10 10 10 Mix hgt (kft)...2.0 2.0 2.0 2.0 2.0 2.0 2.0 Transp wind dir.E E E E N W SW Transp wind spd.8 12 9 8 8 9 10 Haines index....4 3 3 3 3 3 3 SDspl kt-ft/100013 18 15 13 13 15 17 .SATURDAY... Sky/weather.........Partly sunny (30-40 percent). Chance of showers and thunderstorms in the afternoon. CWR.................0 percent increasing to 20 percent in the afternoon. Chance of pcpn......50 percent. LAL.................1 until 1300, then 3 until 1500, then 4. Max temperature.....Around 81. Min humidity........27 percent. Wind (20 ft)........Northeast 8 to 12 mph with gusts to around 16 mph. Gusty and erratic winds expected near thunderstorms in the afternoon. Ridgetop wind.......West around 10 mph until 0900, then northeast 10 to 20 mph. Mixing height.......3500 ft AGL until 1000, then 5500 ft AGL until 1100, then 7500 ft AGL through the afternoon. Transport winds.....West 8 to 10 mph until 0900, then north 7 to 9 mph until 1100, then 15 to 18 mph until 1400, then east. Smoke dispersal.....Poor gradually increasing through the morning to excellent by 1200. Haines Index........4. TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky (%).........25 15 15 10 15 25 35 50 50 60 55 55 Weather cov..... CHC CHC CHC CHC CHC Weather type.... RW RW RW RW RW Tstm cov........ CHC CHC CHC CHC CHC CWR.............0 0 0 0 0 0 10 10 10 10 10 10 Chc of pcpn (%).0 0 0 10 10 10 0 30 50 50 30 50 LAL.............1 1 1 1 1 1 3 3 3 4 4 4 Temp............57 58 61 65 73 77 79 80 79 77 77 76 RH..............58 58 52 46 38 31 27 28 28 32 33 33 20 FT wind dir..W W W NW NE E E E S NE S NE 20 FT wind spd..5 4 3 2 4 8 10 11 11 10 8 8 20 FT wind gust.6 6 4 6 12 14 16 16 14 12 12 Ridge wind dir..W W W NW NE E E E S NE S NE Ridge wind spd..10 10 10 5 10 15 15 20 20 15 15 15 Mix hgt (kft)...2.0 2.0 2.0 3.5 5.5 7.5 9.5 10 8.5 7.5 6.0 6.5 Transp wind dir.W W W NE N N N N E NE E E Transp wind spd.10 9 8 7 9 15 17 18 18 17 15 15 Haines index....4 4 4 4 4 4 4 4 4 4 4 4 SDspl kt-ft/100017 15 15 20 44 100 139 163 132 112 76 82 .SATURDAY NIGHT... Sky/weather.........Mostly clear (15-25 percent). Slight chance of showers and thunderstorms early in the evening. CWR.................0 percent. Chance of pcpn......20 percent. LAL.................2 until 1900, then 1. Min temperature.....Around 53. Max humidity........65 percent. Wind (20 ft)........East winds around 8 mph until 1900, then light. Gusty and erratic winds expected near thunderstorms early in the evening. Ridgetop wind.......East around 15 mph until 2000, then southwest until 2400, then light until 0400, then southwest around 10 mph. Mixing height.......4500 ft AGL until 2000, then 2000 ft AGL. Transport winds.....East 7 to 15 mph. Smoke dispersal.....Good early in the evening decreasing to fair late in the night until 2000. Poor after 2300. Haines Index........3. TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM Sky (%).........30 30 30 20 20 15 10 10 10 10 10 10 Weather cov.....SCH Weather type....RW Tstm cov........SCH CWR.............0 0 0 0 0 0 0 0 0 0 0 0 Chc of pcpn (%).20 10 0 0 0 0 0 0 0 0 0 0 LAL.............2 2 2 1 1 1 1 1 1 1 1 1 Temp............74 74 72 69 65 63 60 58 57 55 55 54 RH..............35 37 40 44 50 55 60 62 63 65 64 62 20 FT wind dir..E E N SW S S SW SW W SW SW SW 20 FT wind spd..8 6 5 5 5 4 2 2 2 2 3 3 20 FT wind gust.12 10 10 8 7 6 6 4 4 4 Ridge wind dir..E E N SW S S SW SW W SW SW SW Ridge wind spd..15 15 10 10 10 10 5 5 5 5 10 10 Mix hgt (kft)...5.0 4.5 3.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 Transp wind dir.E E E E E E E E E E NE NE Transp wind spd.15 13 10 10 10 9 7 7 7 7 8 8 Haines index....3 3 3 3 3 3 3 3 3 3 3 3 SDspl kt-ft/100064 48 25 17 16 14 11 11 11 11 13 13 .SUNDAY... Sky/weather.........Sunny (15-25 percent). Slight chance of showers and thunderstorms in the afternoon. CWR.................0 percent. Chance of pcpn......20 percent. LAL.................1 until 1200, then 2. Max temperature.....Around 79. Min humidity........25 percent. Wind (20 ft)........Light winds until 1100, then east 7 to 10 mph with gusts to around 19 mph. Gusty and erratic winds expected near thunderstorms in the afternoon. Ridgetop wind.......Southwest around 10 mph until 0800, then east. Mixing height.......3500 ft AGL until 0900. 10000 ft AGL after 1400. Transport winds.....Northeast around 8 mph until 0900, then east 9 to 17 mph. Smoke dispersal.....Poor until 0800. Very good after 1300. Haines Index........3. TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky (%).........10 10 5 5 10 10 15 20 25 35 30 30 Weather cov..... SCH SCH SCH SCH SCH SCH Weather type.... RW RW RW RW RW RW Tstm cov........ SCH SCH SCH SCH SCH SCH CWR.............0 0 0 0 0 0 0 0 0 0 0 0 Chc of pcpn (%).0 0 0 0 0 0 20 20 20 20 20 20 LAL.............1 1 1 1 1 1 2 2 2 2 2 2 Temp............54 57 59 62 67 71 76 77 77 78 78 79 RH..............61 57 53 49 42 36 29 28 26 25 25 25 20 FT wind dir..W SW SE E E E E E E E E E 20 FT wind spd..3 3 3 4 6 7 9 10 10 10 10 10 20 FT wind gust.4 4 5 6 10 13 16 18 18 18 19 19 Ridge wind dir..W SW SE E E E E E E E E E Ridge wind spd..10 10 10 10 10 15 15 15 15 15 15 15 Mix hgt (kft)...2.0 2.5 3.5 4.5 6.0 7.5 8.5 9.0 9.5 10 9.5 9.0 Transp wind dir.NE NE E E E E E E E E E E Transp wind spd.8 8 8 9 12 14 16 17 17 17 17 17 Haines index....3 3 3 3 3 3 3 3 3 3 3 3 SDspl kt-ft/100013 19 25 36 59 88 122 137 143 149 143 138 .FORECAST DAYS 3 THROUGH 5... .MONDAY... Mostly clear. Lows in the mid 50s. Highs in the lower 80s. Light winds. .TUESDAY... Mostly clear. Lows in the mid 50s. Highs in the mid 80s. Light winds. .WEDNESDAY... Partly cloudy. Slight chance of showers and thunderstorms. Lows in the upper 50s. Highs in the upper 80s. Light winds. $$ Forecaster...Rowe Requested by...MICHAEL HOLLOWAY Type of request...WILDFIRE .TAG 2418496.0/RIW .DELDT 07/19/24 .FormatterVersion 2.0.0 .EMAIL WYCDC@FIRENET.GOV