Spot Forecast
Issued by NWS Denver/Boulder, CO
Issued by NWS Denver/Boulder, CO
655 FNUS75 KBOU 061028 FWSBOU Spot Forecast for Green MTN RX...USFS National Weather Service Denver/Boulder CO 428 AM MDT Thu Jun 6 2024 If conditions become unrepresentative...contact the National Weather Service. .DISCUSSION...Light and variable winds will start the day, and then turn to persistent easterly winds from mid morning through the afternoon. There is just a slight risk of a passing shower or storm late this afternoon and early evening (between 4 and 9 pm) mainly to the south of the burn area, with a 10-20% chance that gusty outflow winds to around 30 mph could impact the burn area. Weakening flow aloft should also allow transport winds to become easterly by late this morning and continue through this afternoon. Temperatures will be just a couple degrees cooler than yesterday with a slight bump in humidity readings, due to the developing easterly flow. Friday should feature a return of much above normal temperatures and lower humidities down just below prescription thresholds. Transport winds are expected to start out westerly, and then become more northwesterly as long as surface and low level winds turn north to northeast as expected in the afternoon. .TODAY... Sky/weather.........Mostly sunny (10-20 percent) until 1600, then partly cloudy (35-45 percent). Slight chance of a shower or thunderstorm after 1600. CWR.................3 percent. Chance of pcpn......10 percent. LAL.................1 until 1600, then 2. Max temperature.....Around 79. Min humidity........20-21 percent. Wind (20 ft)........Variable up to 5 mph until 1000, then east 5 to 12 mph. Gusty and erratic winds expected near thunderstorms after 1600. Mixing height.......Below 1000 FT AGL until 0800. 8500 ft AGL after 1300. Transport winds.....Light around 5 mph until 0900, then becoming east 9 to 14 mph by 1100. Smoke dispersal.....Poor until 1100, then fair until 1200, then good until 1500, then very good until 1600, then good. 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 (%).........5 4 5 5 6 6 7 12 17 23 38 40 Weather cov..... SCH SCH Weather type.... RW RW Tstm cov........ SCH SCH CWR.............0 0 0 0 0 0 0 0 0 0 0 0 Chc of pcpn (%).0 0 0 0 0 0 0 0 10 10 10 10 LAL.............1 1 1 1 1 1 1 1 1 1 2 2 Temp............51 54 59 64 68 71 74 76 78 79 78 76 RH..............56 53 46 40 33 30 27 25 24 24 25 28 20 FT wind dir..W SW SE E E E E E E E E E 20 FT wind spd..3 2 3 2 3 6 7 8 9 9 9 8 20 FT wind gust.6 3 6 3 6 9 12 13 15 15 15 13 Mix hgt (kft)...0.3 0.4 1.4 2.2 3.3 4.9 6.6 7.9 7.9 8.6 7.9 7.4 Transp wind dir.N N NE N NE E NE E E E E SE Transp wind spd.6 5 6 6 8 9 10 13 14 14 13 12 Haines index....4 4 4 4 4 4 4 4 4 4 4 4 Vrate kt-ft/1K..2 2 7 11 23 39 59 87 95 103 86 74 SmokeDispersion.P P P P P P F G G VG G G .TONIGHT... Sky/weather.........Mostly cloudy (45-55 percent) until 1900, then partly cloudy (25-35 percent). Slight chance of a thunderstorm until 2100. CWR.................3 percent. Chance of pcpn......10 percent. LAL.................2 until 2100, then 1. Min temperature.....Around 55. Max humidity........59 percent. Wind (20 ft)........Southeast winds 5 to 8 mph until 2000, then becoming southwest 6 to 11 mph. Gusty and erratic winds expected near thunderstorms until 2100. Mixing height.......5000 ft AGL until 1900. Below 1000 FT AGL after 2000. Transport winds.....South 9 to 14 mph until 2400, then southwest 11 to 16 mph. Smoke dispersal.....Fair until 1900, then poor. Haines Index........4 or low potential for large plume dominated fire growth. TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM Sky (%).........51 47 43 38 32 26 23 19 12 9 9 9 Weather cov.....SCH SCH SCH Weather type....RW RW RW Tstm cov........SCH SCH SCH CWR.............0 0 0 0 0 0 0 0 0 0 0 0 Chc of pcpn (%).10 10 10 0 0 0 0 0 0 0 0 0 LAL.............2 2 2 1 1 1 1 1 1 1 1 1 Temp............73 71 68 66 64 61 60 59 59 58 56 55 RH..............33 37 42 43 47 51 51 55 56 58 59 59 20 FT wind dir..E SE S S S S SW SW SW SW SW SW 20 FT wind spd..7 6 6 6 6 7 8 8 8 8 8 8 20 FT wind gust.12 9 9 9 9 12 13 13 13 13 13 13 Mix hgt (kft)...5.0 3.2 0.6 0.4 0.3 0.4 0.4 0.3 0.3 0.3 0.3 0.2 Transp wind dir.S S S S SW SW SW SW SW SW SW SW Transp wind spd.12 12 9 9 9 13 14 15 14 14 13 12 Haines index....4 4 4 4 4 4 4 4 4 4 4 4 Vrate kt-ft/1K..51 32 5 3 3 4 5 5 4 4 3 2 SmokeDispersion.F P P P P P P P P P P P .FRIDAY... Sky/weather.........Mostly sunny (10-20 percent) until 1000, then partly cloudy (35-45 percent) until 1200, then mostly cloudy (60-70 percent). Chance of rain showers and thunderstorms after 1200. CWR.................4 percent. Chance of pcpn......50 percent. LAL.................1 until 1200, then 4. Max temperature.....Around 82. Min humidity........14 percent. Wind (20 ft)........West winds 5 to 8 mph until 1000, then becoming north 6 to 11 mph by 1400. Gusty and erratic winds expected near thunderstorms after 1200. Mixing height.......Below 1000 FT AGL until 0700, then 3400 ft AGL until 1000, then 6800 ft AGL until 1100, then 9600 ft AGL until 1200, then 12300 ft AGL until 1600, then 8600 ft AGL. Transport winds.....West 12 to 17 mph until 1200, then becoming northwest 1200-1500, and then north/northeast after 1500. Smoke dispersal.....Poor until 0900, then fair until 1000, then good until 1100, then very good until 1200, then excellent until 1600, then very good until 1700, then good. Haines Index........6 or high potential for large plume dominated fire growth. TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky (%).........11 12 14 15 32 50 67 67 67 67 67 67 Weather cov..... CHC CHC CHC CHC CHC CHC Weather type.... RW RW RW RW RW RW Tstm cov........ CHC CHC CHC CHC CHC CHC CWR.............0 0 0 0 0 0 0 0 0 0 0 0 Chc of pcpn (%).0 0 0 0 0 0 50 50 50 50 50 50 LAL.............1 1 1 1 1 1 4 4 4 4 4 4 Temp............56 59 64 71 77 79 81 82 81 80 79 77 RH..............57 51 41 31 23 21 18 17 18 20 21 23 20 FT wind dir..SW W W W W NW NW NW N N N N 20 FT wind spd..7 6 6 6 6 8 9 8 9 8 9 8 20 FT wind gust.12 9 9 9 9 13 15 13 15 13 15 13 Mix hgt (kft)...0.3 1.5 2.8 4.0 6.8 9.6 12 12 12 12 9.2 6.9 Transp wind dir.W W W W W W W NW NW NW N NE Transp wind spd.12 13 13 14 15 16 17 17 18 18 16 14 Haines index....6 6 6 6 6 6 6 6 6 6 6 6 Vrate kt-ft/1K..3 16 31 48 88 134 185 185 185 185 129 83 SmokeDispersion.P P P F G VG E E E E VG G .FORECAST DAYS 3 THROUGH 5... .SATURDAY... Mostly cloudy. Showers with thunderstorms likely. Lows in the mid 50s. Highs in the lower 70s. Northwest winds around 5 mph. .SUNDAY... Mostly cloudy. Showers and chance of thunderstorms. Lows in the lower 50s. Highs in the upper 60s. East winds around 5 mph. .MONDAY... Mostly cloudy with showers likely and chance of thunderstorms. Lows in the lower 50s. Highs around 70. Southwest winds around 5 mph. $$ Forecaster...Barjenbruch Requested by...John Hill Type of request...PRESCRIBED .TAG 2415471.6/BOU .DELDT 06/06/24 .FormatterVersion 2.0.0 .EMAIL John.Hill@usda.gov