170
FNUS75 KBOU 261847
FWSBOU
SPOT FORECAST FOR RALSTON FIRE...GOLDEN GATE FIRE
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
1147 AM MST THU FEB 26 2026
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
WEST WINDS WILL REMAIN IN PLACE THROUGH THE AFTERNOON AND INTO THE
OVERNIGHT PERIOD, REMAINING FAIRLY CONSISTENT. SUSTAINED 20-FT WINDS
WILL RANGE BETWEEN 10 AND 15 MPH MOST OF THE TIME, BUT COULD BRIEFLY
NEAR 18 TO 20 MPH THIS AFTERNOON. GUSTS WILL LARGELY REMAIN BETWEEN
30 AND 38 MPH, WITH UP TO 40 MPH GUSTS POSSIBLE FOR MID-SLOPE ELEVATIONS
AND ABOVE. WIND DIRECTION WILL BE FAIRLY ALIGNED WITH THE RALSTON CREEK
DRAINAGE, HOWEVER A NORTHWEST/UPSLOPE COMPONENT WILL BE POSSIBLE FOR
NORTHWEST ASPECTS. WEST WINDS WILL REMAIN STEADY INTO THE OVERNIGHT
PERIOD, WITH NO TERRAIN-INDUCED DOWNSLOPE/DOWNVALLEY WINDS EXPECTED.
HUMIDITY IS CURRENTLY HOLDING NEAR 45%, BUT IS EXPECTED TO DROP CLOSER
TO 35% DURING PEAK HEATING EARLY TO MID AFTERNOON. THERE WILL BE LITTLE
TO NO RECOVERY IN HUMIDITY TONIGHT, WITH CONTINUED DOWNSLOPE WINDS
EXPECTED TO SUSTAIN HUMIDITY VALUES AT OR BELOW 40%.
EXPECT BREEZY WEST WINDS TO CONTINUE INTO FRIDAY WITH GUSTS ABOVE 30-35
MPH. DAYTIME HUMIDITY LEVELS WILL TREND NOTABLY LOWER, AND MAY DROP AS
LOW AS 15-20% IN THE AFTERNOON.
REST OF TODAY
SKY/WEATHER.........SUNNY/
CWR.................0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....AROUND 44.
MIN HUMIDITY........34 PERCENT.
WIND (20 FT)........WEST WINDS 11 TO 18 MPH WITH GUSTS UP TO 40
MPH EARLY THIS AFTERNOON, WEAKENING SLIGHTLY
THROUGH LATE AFTERNOON.
MIXING HEIGHT.......2900 FT AGL.
TRANSPORT WINDS.....WEST 29 TO 35 MPH.
SMOKE DISPERSAL.....GOOD UNTIL 1300. FAIR AFTER 1700.
TIME (MST) 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........0 0 0 0 0 0
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0
CHC OF THDR (%).0 0 0 0 0 0
TEMP............41 42 43 44 43 41
RH..............45 40 36 34 34 36
20 FT WIND DIR..W W W W W W
20 FT WIND SPD..24 21 20 20 18 17
20 FT WIND GUST.38 35 32 31 30 28
MIX HGT (KFT)...3.0 3.0 3.0 2.6 2.2 1.8
TRANSP WIND DIR.NW W W W W W
TRANSP WIND SPD.35 32 32 30 30 29
VRATE KT-FT/1K..91 85 83 68 57 44
SMOKEDISPERSION.G G G G F F
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR (10-20 PERCENT).
CWR.................0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MIN TEMPERATURE.....AROUND 31.
MAX HUMIDITY........30 TO 35 PERCENT.
WIND (20 FT)........WEST WINDS 16 TO 24 MPH WITH GUSTS TO AROUND 37
MPH.
MIXING HEIGHT.......1200 FT AGL UNTIL 1900, THEN BELOW 1000 FT AGL.
TRANSPORT WINDS.....WEST 20 TO 25 MPH UNTIL 0500, THEN AROUND 30
MPH.
SMOKE DISPERSAL.....POOR.
TIME (MST) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........8 7 8 8 9 9 13 17 21 19 22 19
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............38 35 35 34 35 35 35 34 33 33 32 33
RH..............30 32 33 35 35 35 35 35 35 35 35 35
20 FT WIND DIR..W W W W W W W W W W W W
20 FT WIND SPD..13 13 13 13 14 14 14 15 15 15 15 15
20 FT WIND GUST.31 31 30 30 30 35 35 35 35 36 36 37
MIX HGT (KFT)...1.2 0.8 0.4 0.4 0.2 0.1 0.1 0.1 0.1 0.2 0.1 0.3
TRANSP WIND DIR.W W W W W W W W W W W W
TRANSP WIND SPD.22 21 21 22 22 22 22 22 23 21 23 30
VRATE KT-FT/1K..23 15 8 8 4 2 2 1 2 3 3 8
SMOKEDISPERSION.P P P P P P P P P P P P
FORECASTER...RODRIGUEZ
REQUESTED BY...CH81
TYPE OF REQUEST...WILDFIRE
.TAG 2604132.0/BOU
.DELDT 02/26/26
.FORMATTERVERSION 2.0.0
.EMAIL JACOB.ADAMS@JEFFCOM911CO.GOV
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