Spot Forecast
Issued by NWS Cheyenne, WY
Issued by NWS Cheyenne, WY
983 FNUS75 KCYS 171959 FWSCYS Spot Forecast for Pole RX 9/10...USFS National Weather Service Cheyenne WY 159 PM MDT Mon Jun 17 2024 If conditions become unrepresentative, contact the National Weather Service at (307) 772-2227 .DISCUSSION... Wednesday will start off cool, with a chance of rain showers by 1500. Thursday and Friday will see increasing temperatures, and humidity values decreasing to the middle to upper 30 percent range by 1500. Afternoon showers and thunderstorm chances increase after 1500 for both Thursday and Friday afternoon, with gusty and erratic winds possible up to 25-35mph. Sustained winds of 10-15mph from the south, southwest after 1200 both days can be expected. Wetting rainfall is possible greater than 0.10 inches after 1500 both days. Mixing heights and ventilation will struggle in the morning hours, but increase to good to excellent by the afternoon timeframe. .JUNETEENTH... Sky/weather.........Mostly sunny (40-50 percent). Slight chance of rain showers in the morning, then chance of showers and thunderstorms in the afternoon. CWR.................11 percent. LAL.................1 until 1200, then 2 until 1500, then 3. Max temperature.....Around 58-61. Min humidity........50 percent. Wind (20 ft)........Southeast winds 17 to 24 mph with gusts to around 37 mph. Gusty and erratic winds expected near thunderstorms early in the afternoon. Gusty and erratic winds expected near thunderstorms late in the afternoon. Mixing height.......2200 ft AGL. Transport winds.....South 26 to 35 mph decreasing to 18 to 23 mph late in the afternoon. Smoke dispersal.....Poor (31500 knot-ft) early in the morning increasing to fair (55200 knot-ft) in the afternoon. Haines Index........2 to 3 or very low potential for large plume dominated fire growth. TIME (MDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky (%).........57 51 45 43 40 37 37 36 35 37 38 Weather cov.....SCH SCH SCH SCH SCH CHC CHC CHC CHC CHC CHC Weather type....RW RW RW RW RW RW RW RW RW RW RW Tstm cov........ SCH SCH SCH CHC CHC CHC CWR.............0 0 0 0 0 10 10 10 10 10 10 LAL.............1 1 1 1 1 2 2 2 3 3 3 Temp............41 42 44 47 49 52 54 56 58 57 57 RH..............77 72 70 66 62 58 57 53 51 54 58 20 FT wind dir..SE SE SE SE SE SE SE SE SE SE SE 20 FT wind spd..21 23 24 23 22 21 21 20 20 18 17 20 FT wind gust.32 35 37 36 33 32 31 31 31 30 30 Mix hgt (kft)...1.5 1.7 1.8 1.9 1.9 1.9 1.8 1.8 1.8 2.0 2.2 Transp wind dir.SE S S S S S S S S S S Transp wind spd.33 35 35 33 32 30 26 23 20 18 18 Haines index....2 2 2 2 2 3 3 3 3 3 3 SDspl kt-ft/100042 49 55 55 53 48 42 35 32 33 37 .WEDNESDAY NIGHT... Sky/weather.........Partly cloudy (40-50 percent) then becoming mostly cloudy (60-70 percent). Chance of showers and thunderstorms in the evening, then slight chance of showers and thunderstorms overnight. CWR.................6 percent. LAL.................3 until 2100, then 1 until 2400, then 2 until 0300, then 1. Min temperature.....Around 46-48. Max humidity........95-100 percent. Wind (20 ft)........Southeast winds around 17 mph. Gusty and erratic winds expected near thunderstorms early in the evening. Gusty and erratic winds expected near thunderstorms overnight. Mixing height.......900 ft AGL. Transport winds.....South 20 to 30 mph. Smoke dispersal.....Fair (40400 knot-ft) early in the evening decreasing to poor (19900 knot-ft) late in the night. Haines Index........3 to 4 or very low to low potential for large plume dominated fire growth. TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM Sky (%).........39 43 47 51 57 62 68 71 74 77 74 70 Weather cov.....CHC CHC CHC CHC CHC CHC SCH SCH SCH SCH SCH SCH Weather type....RW RW RW RW RW RW RW RW RW RW RW RW Tstm cov........CHC CHC CHC SCH SCH SCH CWR.............10 10 10 10 10 10 0 0 0 0 0 0 LAL.............3 3 3 1 1 1 2 2 2 1 1 1 Temp............56 53 51 48 48 48 48 48 48 48 48 48 RH..............62 68 78 86 88 89 89 92 95 96 95 92 20 FT wind dir..SE SE SE SE SE SE SE SE S S S S 20 FT wind spd..17 17 17 17 17 17 17 17 17 17 17 17 20 FT wind gust.29 29 29 29 29 29 29 29 28 28 28 26 Mix hgt (kft)...2.4 2.2 1.9 1.6 1.5 1.4 1.3 1.1 1.0 0.9 1.0 1.1 Transp wind dir.S SE SE SE S S S S S S S S Transp wind spd.20 21 23 25 26 29 29 29 28 26 24 22 Haines index....3 3 3 3 3 3 4 4 4 4 4 4 SDspl kt-ft/100040 40 38 35 34 34 32 28 24 21 20 20 .THURSDAY... Sky/weather.........Mostly sunny (40-50 percent). Rain showers likely and chance of thunderstorms in the afternoon. CWR.................3 percent increasing to 20 percent in the afternoon. LAL.................1 until 1200, then 3. Max temperature.....Around 72-74. Min humidity........38-40 percent. Wind (20 ft)........South winds 15 to 17 mph. Gusty and erratic winds expected near thunderstorms in the afternoon. Mixing height.......7500 ft AGL increasing to 11700 ft AGL in the afternoon. Transport winds.....Southwest 14 to 22 mph. Smoke dispersal.....Poor (7400 knot-ft) early in the morning increasing to good (70600 knot-ft) in the afternoon increasing to good (99000 knot-ft) early in the morning increasing to very good (148500 knot-ft) in the afternoon late in the morning. Haines Index........4 or low potential for large plume dominated fire growth. TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky (%).........67 54 42 29 28 28 27 31 34 38 44 50 Weather cov..... LKY LKY LKY LKY LKY LKY Weather type.... RW RW RW RW RW RW Tstm cov........ CHC CHC CHC CHC CHC CHC CWR.............0 0 0 0 0 0 20 20 20 20 20 20 LAL.............1 1 1 1 1 1 3 3 3 3 3 3 Temp............49 51 54 58 62 65 68 70 70 70 69 67 RH..............86 79 70 62 54 47 42 39 38 39 41 45 20 FT wind dir..S S S S S S S S S S S S 20 FT wind spd..17 17 17 17 16 16 15 15 15 15 15 15 20 FT wind gust.26 26 26 26 26 26 26 26 28 28 28 26 Mix hgt (kft)...1.1 0.6 0.4 1.1 4.0 7.5 10 12 12 11 9.6 7.7 Transp wind dir.SW SW SW SW SW SW SW SW S S S S Transp wind spd.21 21 22 22 21 18 16 15 14 14 14 15 Haines index....4 4 4 4 4 4 4 4 4 4 4 4 SDspl kt-ft/100020 12 7 21 71 118 143 149 145 135 120 99 $$ Forecaster...Wills Requested by...Coyde Fickel Type of request...PRESCRIBED .TAG 2416294.0/CYS .DELDT 06/17/24 .FormatterVersion 2.0.0 .EMAIL Coyde.fickel@usda.gov