431
FNUS75 KBOU 210203
FWSBOU
SPOT FORECAST FOR SUNSHINE FIRE...BOULDER COUNTY SHERIFF
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
703 PM MST SAT DEC 20 2025
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
WINDS ARE CURRENTLY LIGHT (5-8 MPH) AND FROM THE
WSW, WHICH IS WHERE THEY ARE EXPECTED TO REMAIN FOR THE OVERNIGHT
HOURS. GUSTS ARE EXPECTED TO REMAIN BELOW 10-12 MPH UNTIL 1000
TOMORROW MORNING, WHEN SOUTHWESTERLY WINDS ARE EXPECTED TO GUST
BETWEEN 15-20 MPH THROUGH THE AFTERNOON. RH VALUES ARE CURRENTLY
IN THE MID 70% TO 80% RANGE ACROSS THE AREA, WITH GOOD RECOVERIES
EXPECTED TO REMAIN OVERNIGHT. RH VALUES WILL BE IN THE MID 30%
RANGE FOR SUNDAY AFTERNOON.
REST OF TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (35-45 PERCENT).
CWR.................3 PERCENT.
CHANCE OF THUNDER...2 PERCENT.
MIN TEMPERATURE.....AROUND 34.
MAX HUMIDITY........64 PERCENT.
WIND (20 FT)........WEST WINDS 5 TO 7 MPH UNTIL 2100, THEN VARIABLE
UP TO 5 MPH UNTIL 2200, THEN SOUTH AROUND 5 MPH
UNTIL 2400, THEN VARIABLE UP TO 5 MPH UNTIL
0400, THEN SOUTHWEST AROUND 5 MPH UNTIL 0500,
THEN WEST AROUND 6 MPH.
MIXING HEIGHT.......1000 FT AGL UNTIL 2000, THEN BELOW 1000 FT AGL
UNTIL 2100, THEN 1000 FT AGL.
TRANSPORT WINDS.....WEST 8 TO 13 MPH.
SMOKE DISPERSAL.....POOR.
TIME (MST) 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........32 35 39 36 38 31 38 38 50 49 49
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............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............39 38 38 38 37 37 37 37 36 37 35
RH..............85 86 85 80 74 61 61 59 59 61 64
20 FT WIND DIR..W W SW S S SW W SW SW SW W
20 FT WIND SPD..5 5 3 3 3 2 3 3 3 5 6
20 FT WIND GUST.7 7 6 6 6 3 6 6 6 7 9
MIX HGT (KFT)...1.0 0.9 1.0 1.0 1.0 1.0 1.0 1.2 1.1 1.0 1.2
TRANSP WIND DIR.W W W W W W W W W W W
TRANSP WIND SPD.13 13 12 10 9 8 9 12 10 10 9
VRATE KT-FT/1K..12 10 10 9 8 7 8 12 10 9 9
SMOKEDISPERSION.P P P P P P P P P P P
SUNDAY
SKY/WEATHER.........PARTLY CLOUDY (45-55 PERCENT) UNTIL 0800, THEN
MOSTLY CLOUDY (45-55 PERCENT) UNTIL 0900, THEN
PARTLY CLOUDY (35-45 PERCENT).
CWR.................1 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....AROUND 55.
MIN HUMIDITY........36 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 5 TO 7 MPH UNTIL 1000. WEST 9
TO 14 MPH AFTER 1500.
MIXING HEIGHT.......2900 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 8 TO 13 MPH UNTIL 1200, THEN WEST 17
TO 23 MPH UNTIL 1700, THEN AROUND 13 MPH.
SMOKE DISPERSAL.....POOR UNTIL 1200, THEN FAIR UNTIL 1600, THEN
POOR.
TIME (MST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........50 49 52 40 41 46 40 36 31 34 29 43
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............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............36 37 39 45 47 48 52 53 54 55 53 50
RH..............61 59 54 45 42 42 38 36 36 36 38 42
20 FT WIND DIR..W W SW SW SW SW SW SW SW W W W
20 FT WIND SPD..6 6 6 5 6 7 9 9 12 12 10 10
20 FT WIND GUST.9 9 9 7 9 12 15 15 17 18 17 17
MIX HGT (KFT)...1.2 1.3 1.2 1.7 2.2 2.7 2.8 2.9 3.0 2.7 2.4 1.9
TRANSP WIND DIR.SW SW SW S SW SW W W W W W W
TRANSP WIND SPD.8 9 8 9 10 13 18 20 21 23 17 13
VRATE KT-FT/1K..9 10 9 14 20 29 45 50 54 55 36 21
SMOKEDISPERSION.P P P P P P F F F F P P
FORECASTER...BONNER
REQUESTED BY...SCHIMEL
TYPE OF REQUEST...WILDFIRE
.TAG 2527989.0/BOU
.DELDT 12/20/25
.FORMATTERVERSION 2.0.0
.EMAIL TSCHIMEL@BOULDERCOUNTY.GOV
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