443
FNUS75 KBOU 171006
FWSBOU
SPOT FORECAST FOR GREEN MOUNTAIN RX...USFS
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
406 AM MDT WED JUN 17 2026
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
WEDNESDAY WILL BE HOT, DRY, AND BREEZY AT THE BURN SITE, WITH NO
PRECIPITATION EXPECTED. A COLD FRONT WILL BRING COOLER
TEMPERATURES AND SLIGHTLY HIGHER RELATIVE HUMIDITY VALUES FOR
THURSDAY. GUIDANCE HAS TRENDED TOWARDS HIGHER HUMIDITIES, WITH
MINIMUM RH NOW EXPECTED TO BE 20-21%. WINDS SHOULD GENERALLY BE
FROM THE EAST/NORTHEAST, WITH SUSTAINED SPEEDS BETWEEN 8-12 MPH.
GUSTS UP TO 15-20 MPH IS POSSIBLE AT TIMES, PARTICULARLY IN THE
EARLY AFTERNOON HOURS. SMOKE DISPERSAL CONDITIONS SHOULD BE GOOD
TO VERY GOOD IN THE AFTERNOON. SIMILAR CONDITIONS ARE EXPECTED
FRIDAY. THERE IS A LOW (<20% CHANCE) OF ISOLATED
SHOWERS/THUNDERSTORMS IN THE AFTERNOON. HOWEVER, NO RAINFALL
ACCUMULATION IS EXPECTED, GIVEN THE DRY AIR MASS IN PLACE. IF A
STORM WERE TO OCCUR OVER THE BURN SITE, LIGHTNING AND GUSTY
ERRATIC OUTFLOW WINDS ARE POSSIBLE.
PRECIPITATIONS/THUNDERSTORM CHANCES INCREASE THIS WEEKEND, WITH A
20-30% CHANCE BOTH AFTERNOONS. HOWEVER, BEST CHANCE WILL REMAIN
EAST OF THE AREA. CURRENT FORECAST CALLS FOR LITTLE IF ANY WETTING
RAIN, WITH A 20% CHANCE OF ACCUMULATION UP TO 0.05". WINDS ON
SATURDAY SHOULD INCREASE IN THE AFTERNOON, WITH GUSTS UP TO 25-30
MPH.
MONDAY CONTINUES TO LOOK LIKE THE BEST CHANCE FOR
SHOWERS/THUNDERSTORMS AND WETTING RAIN. CURRENT FORECAST CALLS FOR
RAINFALL ACCUMULATION UP TO 0.20-0.25" IF A STORM OCCURS OVER THE
BURN SITE.
IN TERMS OF SMOKE OUT OF STATE, WITH NORTHWEST FLOW ALOFT, SMOKE
FROM FIRES OUT WEST COULD BE ADVECTED INTO THE STATE ON WEDNESDAY.
HOWEVER, BY THURSDAY MODEL GUIDANCE SHOWS LITTLE IF ANY SMOKE
ENTERING THE STATE. IF A NEW FIRE STARTS, THIS COULD CHANGE.
REST OF TODAY
SKY/WEATHER.........MOSTLY SUNNY (5-15 PERCENT).
CWR.................1 PERCENT.
CHANCE OF PCPN......0 PERCENT.
CHANCE OF THUNDER...2 PERCENT.
MAX TEMPERATURE.....AROUND 85.
MIN HUMIDITY........10 PERCENT.
WIND (20 FT)........WEST WINDS 8 TO 13 MPH WITH GUSTS TO AROUND 21
MPH UNTIL 1600, THEN NORTHWEST 11 TO 16 MPH
WITH GUSTS TO AROUND 22 MPH.
MIXING HEIGHT.......BELOW 1000 FT AGL UNTIL 0800. 11600 FT AGL
AFTER 1200.
TRANSPORT WINDS.....NORTHWEST 10 TO 18 MPH UNTIL 0900, THEN 23 TO
30 MPH.
SMOKE DISPERSAL.....POOR UNTIL 0800, THEN FAIR UNTIL 0900, THEN
VERY GOOD UNTIL 1100, THEN EXCELLENT.
TIME (MDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........8 6 7 5 4 6 5 6 7 6 11
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0
CHC OF PCPN (%).0 0 0 0 0 0 0 0 0 0 0
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0
TEMP............59 62 69 75 78 81 83 84 85 84 84
RH..............29 27 21 17 15 13 11 11 10 11 11
20 FT WIND DIR..W W W W W W W W W NW NW
20 FT WIND SPD..8 9 9 9 10 10 12 12 13 13 14
20 FT WIND GUST.13 15 15 15 16 16 18 18 21 21 22
MIX HGT (KFT)...0.8 3.3 5.1 6.4 7.4 9.0 10 11 12 12 12
TRANSP WIND DIR.W NW NW NW NW NW NW NW W NW NW
TRANSP WIND SPD.10 18 23 26 28 30 29 28 26 26 25
VRATE KT-FT/1K..8 53 101 147 177 234 250 254 264 270 260
SMOKEDISPERSION.P F VG VG E E E E E E E
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR (10-20 PERCENT).
CWR.................0 PERCENT.
CHANCE OF PCPN......0 PERCENT.
CHANCE OF THUNDER...1 PERCENT.
MIN TEMPERATURE.....AROUND 48.
MAX HUMIDITY........63 PERCENT.
WIND (20 FT)........NORTHWEST WINDS 7 TO 13 MPH WITH GUSTS TO
AROUND 21 MPH UNTIL 2300, THEN NORTH 6 TO 11
MPH UNTIL 0100, THEN AROUND 7 MPH UNTIL 0200,
THEN NORTHEAST AROUND 5 MPH UNTIL 0300, THEN
VARIABLE UP TO 5 MPH.
MIXING HEIGHT.......11300 FT AGL UNTIL 1900, THEN 9500 FT AGL UNTIL
2000, THEN 1000 FT AGL UNTIL 2100, THEN BELOW
1000 FT AGL UNTIL 2400, THEN 1000 FT AGL UNTIL
0300, THEN BELOW 1000 FT AGL.
TRANSPORT WINDS.....NORTHWEST 20 TO 25 MPH UNTIL 2000, THEN 9 TO 14
MPH UNTIL 2400, THEN NORTH UNTIL 0300, THEN
NORTHEAST 8 TO 9 MPH UNTIL 0500, THEN LIGHT.
SMOKE DISPERSAL.....EXCELLENT UNTIL 2000, THEN POOR.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........13 18 16 21 22 10 8 13 12 9 6 7
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
CHC OF PCPN (%).0 0 0 0 0 0 0 0 0 0 0 0
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............83 80 75 69 65 63 61 58 55 52 50 49
RH..............11 13 17 21 26 30 35 39 45 52 58 61
20 FT WIND DIR..NW NW NW NW NW N N N NE NE E SE
20 FT WIND SPD..13 10 8 6 7 8 9 7 5 2 1 2
20 FT WIND GUST.21 16 13 9 12 13 15 12 7 3 2 3
MIX HGT (KFT)...11 9.5 1.0 0.6 0.6 0.7 1.0 1.5 1.1 0.9 0.8 0.5
TRANSP WIND DIR.NW W W W NW NW N N NE N NE SE
TRANSP WIND SPD.24 21 12 9 10 13 14 13 9 7 6 5
VRATE KT-FT/1K..237 172 10 5 6 8 12 17 9 6 4 2
SMOKEDISPERSION.E E P P P P P P P P P P
THURSDAY
SKY/WEATHER.........MOSTLY SUNNY (10-20 PERCENT) UNTIL 1200, THEN
PARTLY CLOUDY (30-40 PERCENT) UNTIL 1500, THEN
MOSTLY SUNNY (15-25 PERCENT) UNTIL 1700, THEN
PARTLY CLOUDY (20-30 PERCENT).
CWR.................1 PERCENT.
CHANCE OF PCPN......0 PERCENT.
CHANCE OF THUNDER...3 PERCENT.
MAX TEMPERATURE.....AROUND 78.
MIN HUMIDITY........20 PERCENT.
WIND (20 FT)........VARIABLE UP TO 5 MPH UNTIL 1000, THEN SOUTHEAST
AROUND 6 MPH UNTIL 1100, THEN EAST AROUND 8 MPH
UNTIL 1200, THEN NORTHEAST 6 TO 11 MPH.
MIXING HEIGHT.......BELOW 1000 FT AGL UNTIL 0700. 9700 FT AGL AFTER
1600.
TRANSPORT WINDS.....SOUTHWEST 8 TO 10 MPH UNTIL 0900. NORTHWEST 13
TO 18 MPH AFTER 1100.
SMOKE DISPERSAL.....POOR UNTIL 1000, THEN FAIR UNTIL 1100, THEN
GOOD UNTIL 1300, THEN VERY GOOD UNTIL 1500,
THEN GOOD UNTIL 1600, THEN EXCELLENT UNTIL
1700, THEN VERY GOOD.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........10 8 7 11 25 23 30 36 29 21 22 26
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
CHC OF PCPN (%).0 0 0 0 0 0 0 0 0 0 0 0
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............48 49 52 58 65 70 73 76 78 78 78 78
RH..............63 63 61 53 41 32 27 23 22 21 21 20
20 FT WIND DIR..S S S S SE E NE NE E E NE NE
20 FT WIND SPD..2 2 2 3 6 8 9 9 9 8 8 9
20 FT WIND GUST.3 3 3 6 9 13 15 15 15 13 13 15
MIX HGT (KFT)...0.5 1.2 2.4 3.1 4.5 6.1 7.4 9.2 9.4 7.3 10 8.1
TRANSP WIND DIR.S SW SW SW W NW NW NW NW NW NW NW
TRANSP WIND SPD.5 6 9 12 14 15 14 15 15 14 17 15
VRATE KT-FT/1K..2 6 19 31 54 79 89 120 123 87 154 106
SMOKEDISPERSION.P P P P F G G VG VG G E VG
FORECAST DAYS 3 THROUGH 7
JUNETEENTH
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS IN THE MID 50S. HIGHS IN THE LOWER 80S. EAST WINDS AROUND
8-11 MPH, WITH GUSTS UP TO 20 MPH POSSIBLE.
SATURDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS IN THE MID 50S. HIGHS IN THE MID 80S. WEST/SOUTHWEST WINDS AROUND
10 MPH, WITH GUSTS UP TO 25-30 MPH IN THE AFTERNOON.
SUNDAY
MOSTLY CLEAR. SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS. LOWS IN
THE LOWER 50S. HIGHS AROUND 80. WEST WINDS AROUND 7 MPH.
MONDAY
PARTLY CLOUDY WITH SHOWERS AND THUNDERSTORMS LIKELY. LOWS IN THE
LOWER 50S. HIGHS IN THE UPPER 70S.
TUESDAY
PARTLY CLOUDY WITH CHANCE OF SHOWERS AND THUNDERSTORMS. LOWS IN
THE LOWER 50S. HIGHS IN THE UPPER 70S.
OUTLOOK FOR WEDNESDAY JUNE 24 THROUGH TUESDAY JUNE 30
FORECASTER...IDEKER
REQUESTED BY...JAMES PILSMAKER
TYPE OF REQUEST...PRESCRIBED
.TAG 2615310.7/BOU
.DELDT 06/17/26
.FORMATTERVERSION 2.0.0
.EMAIL JAMES.PILSMAKER@USDA.GOV
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page