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Spot Forecast
Issued by NWS Riverton, WY
Issued by NWS Riverton, WY
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728 FNUS75 KRIW 181123 FWSRIW Spot Forecast for Fish Creek Fire...USDA National Weather Service Riverton WY 523 AM MDT Sun Aug 18 2024 Forecast is based on forecast start time of 0700 MDT on August 18. If conditions become unrepresentative, contact the National Weather Service .DISCUSSION... Increased monsoonal moisture will keep temperatures a few degrees cooler today, with humidity only dropping to around 30 percent this afternoon. Showers and thunderstorms will develop in the area by around 1500 with chances then lasting through the evening. Strong and erratic outflow wind gusting 35 to 45 mph will again be possible with this activity. Monday will see similar conditions though with a slightly better chance of a wetting rain. ...Thunderstorms imply strong gusty and erratic winds... ...Haines index is high level haines both day and night... .REST OF TODAY... Sky/weather.........Mostly sunny (20-30 percent). Isolated to scattered showers and thunderstorms after 1200. CWR.................2 percent. Chance of pcpn......20 percent. LAL.................1 until 1200, then 2. Max temperature.....Around 69. Min humidity........34 percent. Wind (20 ft)........Light becoming west around 8 mph. Gusty and erratic winds expected near thunderstorms. Ridgetop wind.......South around 5 mph becoming west around 15 mph after 1200. Mixing height.......100 ft AGL increasing to 8500 ft AGL by 1500. Transport winds.....South around 7 mph becoming west 12 to 17 mph after 1100. Smoke dispersal.....Poor increasing to very good after 1400. Haines Index........3 to 4. TIME (MDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky (%).........45 25 30 5 15 15 20 25 35 35 40 Weather cov..... Weather type.... Tstm cov........ ISO ISO ISO ISO ISO ISO CWR.............0 0 0 0 0 0 0 0 0 0 0 Chc of pcpn (%).5 5 5 5 10 15 15 15 30 30 30 LAL.............1 1 1 1 1 2 2 2 2 2 2 Temp............46 50 55 59 62 64 66 67 68 68 68 RH..............87 82 71 61 54 49 45 42 38 36 37 20 FT wind dir..NE SE S SW W W W W W W SW 20 FT wind spd..3 2 2 4 6 7 8 8 7 7 6 20 FT wind gust.4 6 7 10 12 12 10 10 10 Ridge wind dir..NE SE S SW W W W W W W SW Ridge wind spd..10 5 5 10 10 15 15 15 15 15 15 Mix hgt (kft)...0.1 0.5 1.0 2.5 4.5 6.0 7.0 7.5 8.5 8.0 8.0 Transp wind dir.SE S SW W W W W W W W W Transp wind spd.8 7 7 9 12 14 16 17 16 16 14 Haines index....3 3 3 3 3 4 4 4 4 4 4 SDspl kt-ft/10002 2 5 20 43 71 96 116 117 114 95 .TONIGHT... Sky/weather.........Partly to mostly cloudy (35-60 percent). Isolated to scattered showers and thunderstorms before midnight. CWR.................4 percent. Chance of pcpn......30 percent. LAL.................2 until 2400, then 1. Min temperature.....Around 47. Max humidity........86 percent. Wind (20 ft)........Downslope/downvalley. Gusty and erratic winds expected near thunderstorms. Ridgetop wind.......South 10 to 15 mph becoming east to northeast around 10 mph after 2000. Mixing height.......5500 ft AGL decreasing to around 500 ft AGL after 2000. Transport winds.....Southwest 10 to 13 mph until 2100, then south 7 to 10 mph. Smoke dispersal.....Fair increasing to poor after 1900. Haines Index........3 to 4. TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM Sky (%).........35 35 40 55 55 50 55 45 60 45 55 45 Weather cov..... SCT SCT SCT Weather type.... RW RW RW Tstm cov........ISO ISO ISO ISO ISO ISO CWR.............0 0 0 0 0 0 0 0 0 0 0 0 Chc of pcpn (%).20 20 20 30 30 30 10 10 10 10 10 10 LAL.............2 2 2 2 2 2 1 1 1 1 1 1 Temp............66 63 60 55 53 52 52 51 51 50 48 48 RH..............39 45 51 63 69 74 72 74 74 77 81 80 20 FT wind dir..SW SE N E E SE NE NE NE E N N 20 FT wind spd..6 5 5 5 5 3 3 5 2 3 2 2 20 FT wind gust.10 6 6 6 6 4 4 6 4 Ridge wind dir..SW SE N E E SE NE NE NE E N N Ridge wind spd..15 10 10 10 10 10 10 10 5 10 5 5 Mix hgt (kft)...5.5 2.0 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 Transp wind dir.SW S S S S S S SE S S S SW Transp wind spd.13 10 10 10 10 8 9 10 8 8 8 7 Haines index....4 4 4 4 4 4 3 3 3 3 3 3 SDspl kt-ft/100060 20 2 2 2 2 2 2 2 2 2 2 .MONDAY... Sky/weather.........Mostly sunny (35-45 percent). Scattered showers and thunderstorms, especially in the afternoon. CWR.................0 percent increasing to 60 percent in the afternoon. Chance of pcpn......60 percent. LAL.................1 until 0900, then 2 until 1200, then 4. Max temperature.....Around 68. Min humidity........44 percent. Wind (20 ft)........Light becoming southwest around 7 mph after 1100. Gusty and erratic winds expected near any thunderstorms. Ridgetop wind.......East 5 to 10 mph becoming southwest 10 to 15 mph by 1100. Mixing height.......Below 500 ft AGL increasing to 7000 ft AGL by 1200. Transport winds.....South 7 to 12 mph until 1200, then west 13 to 14 mph. Smoke dispersal.....Poor increasing to good by 1200. Haines Index........3. TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky (%).........45 55 45 40 20 25 25 35 50 60 60 55 Weather cov.....SCT SCT SCT SCT SCT SCT NUM NUM NUM NUM NUM NUM Weather type....RW RW RW RW RW RW RW RW RW RW RW RW Tstm cov........ ISO ISO ISO SCT SCT SCT NUM NUM NUM CWR.............0 0 0 0 0 0 60 60 60 60 60 60 Chc of pcpn (%).30 30 30 30 30 30 60 60 60 60 60 60 LAL.............1 1 1 2 2 2 4 4 4 4 4 4 Temp............48 48 51 55 58 61 64 64 64 64 61 59 RH..............82 81 78 69 61 54 49 49 50 50 57 63 20 FT wind dir..E E SE S S SW SW SW SW SW W W 20 FT wind spd..3 2 3 3 4 6 6 7 7 7 6 6 20 FT wind gust.4 4 4 6 7 10 10 10 10 10 7 Ridge wind dir..E E SE S S SW SW SW SW SW W W Ridge wind spd..10 5 10 10 10 10 15 15 15 15 15 10 Mix hgt (kft)...0.5 0.1 0.5 1.0 3.0 5.0 7.0 6.5 5.5 4.5 3.5 2.5 Transp wind dir.S S S S S SW W W W W W W Transp wind spd.8 7 8 8 9 12 13 14 14 14 14 13 Haines index....3 3 3 3 3 3 3 3 3 3 3 3 SDspl kt-ft/10002 1 2 7 23 51 79 75 65 54 42 28 .FORECAST DAYS 3 THROUGH 5... .TUESDAY... Mostly clear. Slight chance of showers and thunderstorms. Lows in the mid 40s. Highs in the upper 60s. Southwest 4 to 8 mph. .WEDNESDAY... Mostly clear. Lows in the mid 40s. Highs in the mid 60s. South winds around 7 mph. .THURSDAY... Mostly clear. Lows in the lower 40s. Highs in the mid 60s. South winds around 7 mph. $$ Forecaster...Myers Requested by...Dana Ensminger Type of request...WILDFIRE .TAG 2420486.0/RIW .DELDT 08/18/24 .FormatterVersion 2.0.0 .EMAIL dana.ensminger@usda.gov