Spot Forecast
Issued by NWS Riverton, WY
Issued by NWS Riverton, WY
089 FNUS75 KRIW 281856 FWSRIW Spot Forecast for TEST RIW1...RIW National Weather Service Riverton WY 1256 PM MDT Tue May 28 2024 Forecast is based on ignition time of 1200 MDT on May 29. If conditions become unrepresentative, contact the National Weather Service .DISCUSSION... This is a test! ...Thunderstorms imply strong gusty and erratic winds... ...Haines index is high level haines both day and night... .WEDNESDAY... Sky/weather.........Partly sunny (50-60 percent). Scattered showers and thunderstorms. CWR.................44 percent. Chance of pcpn......50 percent. LAL.................4. Max temperature.....Around 62. Min humidity........40 percent. Wind (20 ft)........West winds 10 to 17 mph. Gusts up to 26 mph increasing to 31 mph late in the afternoon. Gusty and erratic winds expected near thunderstorms. Ridgetop wind.......West 20 to 25 mph. Mixing height.......6900 ft AGL decreasing to 4300 ft AGL late in the afternoon. Transport winds.....West 18 to 25 mph. Smoke dispersal.....Good (95400 knot-ft) early in the morning increasing to very good (110400 knot-ft) in the afternoon. Haines Index........3 or very low potential for large plume dominated fire growth. TIME (MDT) 12P 1PM 2PM 3PM 4PM 5PM Sky (%).........64 62 59 57 53 50 Weather cov.....SCT SCT SCT SCT SCT SCT Weather type....RW RW RW RW RW RW Tstm cov........SCT SCT SCT SCT SCT SCT CWR.............40 40 40 40 40 40 Chc of pcpn (%).50 50 50 40 40 40 LAL.............4 4 4 4 4 4 Temp............61 60 59 58 57 56 RH..............40 43 46 48 49 49 20 FT wind dir..W W W W W W 20 FT wind spd..10 11 14 17 15 12 20 FT wind gust.16 17 21 25 22 18 Ridge wind dir..W W W W W W Ridge wind spd..20 20 20 25 25 25 Mix hgt (kft)...6.9 6.9 6.9 4.3 4.3 4.3 Transp wind dir.SW SW SW W W W Transp wind spd.18 18 18 25 25 25 Haines index....3 3 3 3 3 3 SDspl kt-ft/1000110 110 110 95 95 95 .WEDNESDAY NIGHT... Sky/weather.........Partly cloudy (20-30 percent). Widespread frost early in the morning. CWR.................0 percent. Chance of pcpn......0 percent. LAL.................1. Min temperature.....Around 29. Max humidity........70 percent. Wind (20 ft)........Northwest winds 5 to 13 mph with gusts to around 19 mph in the evening and overnight becoming light. Ridgetop wind.......Northwest 15 to 20 mph decreasing to around 10 mph overnight. Mixing height.......3800 ft AGL decreasing to 600 ft AGL. Transport winds.....Northwest 9 to 18 mph. Smoke dispersal.....Good (61200 knot-ft) early in the evening decreasing to poor (4800 knot-ft) late in the night. Haines Index........2 to 3 or very low potential for large plume dominated fire growth. TIME (MDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM Sky (%).........46 28 15 7 7 6 Weather cov..... Weather type....NONE NONE NONE NONE NONE NONE Tstm cov........ CWR.............0 0 0 0 0 0 Chc of pcpn (%).0 0 0 0 0 0 LAL.............1 1 1 1 1 1 Temp............55 48 42 37 34 32 RH..............49 53 57 60 61 64 20 ft wind......W 13 W 9 NW 6 NW 5 NW 5 NW 4 20 ft wind gust.19 14 8 7 7 6 Ridgetop wind...W 20 W 20 NW 15 NW 10 NW 10 NW 10 Mix hgt (ft)....3800 3800 2200 700 700 600 Transport wind..W 18 W 18 W 13 NW 10 NW 10 NW 9 Haines index....3 3 3 2 2 2 SDspl kt-ft/100061 61 25 6 6 5 .THURSDAY... Sky/weather.........Sunny (5-15 percent). Widespread frost early in the morning. CWR.................0 percent. Chance of pcpn......0 percent. LAL.................1. Max temperature.....Around 54. Min humidity........26 percent. Wind (20 ft)........Light winds becoming west 5 to 11 mph with gusts to around 19 mph. Ridgetop wind.......West 10 to 15 mph increasing to around 20 mph late in the afternoon. Mixing height.......600 ft AGL increasing to 6700 ft AGL. Transport winds.....West 10 to 18 mph increasing to around 22 mph late in the afternoon. Smoke dispersal.....Poor (5200 knot-ft) early in the morning increasing to good (90900 knot-ft) in the afternoon increasing to very good (127400 knot-ft) late in the afternoon. Haines Index........2 or very low potential for large plume dominated fire growth. TIME (MDT) 6 AM 9 AM NOON 3 PM Sky (%).........5 7 14 14 Weather cov.....WIDSPD Weather type....FROST NONE NONE NONE Tstm cov........ CWR.............0 0 0 0 Chc of pcpn (%).0 0 0 0 LAL.............1 1 1 1 Temp............29 39 50 53 RH..............69 43 29 26 20 FT wind......NW 4G7 W 6G12 W 8G14 W 11G18 Ridgetop wind...NW 10 W 15 W 15 W 20 Mix hgt (ft)....600 3500 5700 6700 Transport wind..NW 10 W 14 W 18 W 22 Haines index....2 2 2 2 SDspl kt-ft/10005 42 91 127 .FORECAST DAYS 3 THROUGH 5... .FRIDAY... Mostly clear. Lows in the upper 20s. Highs in the lower 60s. Northwest winds around 6 mph. .SATURDAY... Mostly clear. Lows in the mid 30s. Highs in the mid 60s. Northwest winds around 6 mph. .SUNDAY... Mostly cloudy. Lows in the upper 30s. Highs in the lower 60s. Northwest winds around 7 mph. $$ Forecaster...Myers Requested by...Myers Type of request...PRESCRIBED .TAG 2490863.0/RIW .DELDT 05/28/24 .FormatterVersion 2.0.0 .EMAIL noah.myers@noaa.gov