769
FNUS75 KBOU 091059
FWSBOU
SPOT FORECAST FOR 4AB...USFWS
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
459 AM MDT MON MAR 9 2026
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
AN UNSEASONABLY WARM AND DRY DAY CAN BE EXPECTED
TODAY. WINDS SHOULD START OUT FROM THE SOUTH (HIGH CONFIDENCE)
AND THEN TURN MORE WESTERLY BY 1-2 PM WITH DAYTIME HEATING AND
MIXING. THAT MIXING SHOULD ALSO BRING AN INCREASE IN SPEEDS, WITH
WINDS INCREASING FROM AROUND 8-10 MPH TO 10-15 MPH WITH A FEW
GUSTS INTO THE 20-25 MPH RANGE FOR MID TO LATE AFTERNOON. HOWEVER,
THERE IS A SLIGHT CHANCE (20-30%) THAT THE STRONGER WINDS DON'T
MATERIALIZE OR WINDS JUST BECOME LIGHT AND VARIABLE FOR A COUPLE
HOURS THIS AFTERNOON. HUMIDITY READINGS WILL BE VERY LOW, DROPPING
TO AROUND 10-11% FOR MINIMUMS AS HIGH TEMPERATURES REACH THE
LOWER TO MID 70S. SMOKE DISPERSIONS WILL BE GOOD FOR MOST OF THIS
AFTERNOON THANKS TO STRONG DIURNAL HEATING AND MIXING.
WINDS WILL BECOME LIGHTER AGAIN BY THIS EVENING. SIMILAR WEATHER
CONDITONS CAN BE EXPECTED TUESDAY, ALTHOUGH AN EARLIER ARRIVAL OF
A BACKDOOR COLD FRONT COULD SPELL (30% CHANCE) JUST WEAKER WINDS
PERSIST THROUGH THE DAY. OTHERWISE, IT WILL BE ANOTHER
UNSEASONABLY MILD AND DRY DAY.
WEDNESDAY WILL BE COOLER BUT STILL BREEZY AT TIMES.
WE'RE INCREASINGLY CONFIDENT THAT STRONGER WINDS AND CRITICAL FIRE
WEATHER CONDITIONS WILL DEVELOP THURSDAY, POSSIBLY LASTING INTO
FRIDAY AND SATURDAY.
TODAY
SKY/WEATHER.........MOSTLY SUNNY (10-20 PERCENT) UNTIL 0900, THEN
PARTLY CLOUDY (20-35 PERCENT).
CWR.................0 PERCENT.
CHANCE OF PCPN......0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....AROUND 73.
MIN HUMIDITY........11 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 6 TO 11 MPH UNTIL 1300. WEST 11
TO 16 MPH WITH GUSTS TO AROUND 23 MPH AFTER
1500.
MIXING HEIGHT.......BELOW 1000 FT AGL UNTIL 1100, THEN 2100 FT AGL
UNTIL 1300, THEN 6200 FT AGL UNTIL 1500, THEN
9400 FT AGL UNTIL 1600, THEN 6700 FT AGL UNTIL
1700, THEN 4000 FT AGL.
TRANSPORT WINDS.....SOUTH 8 TO 12 MPH UNTIL 1100, THEN WEST 9 TO 18
MPH.
SMOKE DISPERSAL.....POOR UNTIL 1200, THEN FAIR UNTIL 1300, THEN
GOOD UNTIL 1400, THEN VERY GOOD UNTIL 1700, THEN
FAIR.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........5 12 23 31 25 24 17 16 14 13 13 11
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............43 43 44 46 56 62 66 71 72 73 73 72
RH..............43 45 43 41 27 21 16 13 12 11 12 13
20 FT WIND DIR..S S S S SW SW SW SW W W W W
20 FT WIND SPD..9 9 9 8 7 7 8 9 12 13 13 13
20 FT WIND GUST.16 16 16 15 14 14 15 16 22 23 23 22
MIX HGT (KFT)...0.5 0.4 0.4 0.4 0.8 1.4 3.1 4.5 6.9 9.4 6.7 4.0
TRANSP WIND DIR.S S S SW SW SW W W W W W W
TRANSP WIND SPD.9 9 9 9 9 9 13 15 18 18 18 16
VRATE KT-FT/1K..4 4 4 3 7 12 40 62 111 150 108 57
SMOKEDISPERSION.P P P P P P F G VG VG VG F
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR (15-25 PERCENT).
CWR.................0 PERCENT.
CHANCE OF PCPN......0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MIN TEMPERATURE.....AROUND 37.
MAX HUMIDITY........51 PERCENT.
WIND (20 FT)........WEST WINDS 7 TO 12 MPH UNTIL 2000. SOUTH AROUND
8 MPH AFTER 0500.
MIXING HEIGHT.......1200 FT AGL UNTIL 1900, THEN BELOW 1000 FT AGL.
TRANSPORT WINDS.....WEST 8 TO 12 MPH UNTIL 2000, THEN SOUTHWEST 8
TO 13 MPH.
SMOKE DISPERSAL.....POOR.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........9 13 11 12 12 12 11 12 12 18 22 28
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............70 65 60 56 53 51 48 45 45 43 42 41
RH..............13 17 21 24 28 31 35 39 38 41 43 45
20 FT WIND DIR..W W W SW SW SW SW S S S S S
20 FT WIND SPD..10 9 9 9 8 8 8 8 8 8 8 8
20 FT WIND GUST.17 16 16 16 15 15 15 15 15 15 15 15
MIX HGT (KFT)...1.2 0.7 0.6 0.5 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4
TRANSP WIND DIR.W W SW SW SW SW S S S S S S
TRANSP WIND SPD.10 9 9 9 9 10 10 10 12 10 10 10
VRATE KT-FT/1K..10 6 5 4 4 4 3 4 5 4 4 4
SMOKEDISPERSION.P P P P P P P P P P P P
TUESDAY
SKY/WEATHER.........PARTLY CLOUDY (35-45 PERCENT) UNTIL 1200, THEN
MOSTLY SUNNY (20-30 PERCENT) UNTIL 1400, THEN
PARTLY CLOUDY (25-35 PERCENT).
CWR.................1 PERCENT.
CHANCE OF PCPN......0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....AROUND 71.
MIN HUMIDITY........16 PERCENT.
WIND (20 FT)........SOUTH WINDS 5 TO 13 MPH UNTIL 1300. WEST 9 TO
14 MPH WITH GUSTS TO AROUND 24 MPH AFTER 1400.
MIXING HEIGHT.......BELOW 1000 FT AGL UNTIL 1000, THEN 2500 FT AGL
UNTIL 1300, THEN 5600 FT AGL UNTIL 1400, THEN
8600 FT AGL UNTIL 1500, THEN 11500 FT AGL UNTIL
1600, THEN 8600 FT AGL UNTIL 1700, THEN 5700 FT
AGL.
TRANSPORT WINDS.....SOUTH 8 TO 13 MPH UNTIL 1400, THEN WEST 16 TO
21 MPH.
SMOKE DISPERSAL.....POOR UNTIL 1300, THEN FAIR UNTIL 1400, THEN
VERY GOOD UNTIL 1500, THEN EXCELLENT UNTIL
1600, THEN VERY GOOD UNTIL 1700, THEN GOOD.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........37 43 46 42 36 31 25 25 27 30 34 37
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............40 38 42 45 53 58 63 67 70 71 71 69
RH..............46 51 47 43 32 25 21 18 16 16 17 18
20 FT WIND DIR..S S S S SW SW SW SW W W W W
20 FT WIND SPD..8 8 8 7 7 7 7 8 9 10 12 14
20 FT WIND GUST.14 14 14 14 14 14 14 15 18 21 23 24
MIX HGT (KFT)...0.4 0.4 0.5 0.5 1.2 2.0 2.7 5.6 8.6 12 8.6 5.7
TRANSP WIND DIR.S S S S S S S SW W W W W
TRANSP WIND SPD.9 10 10 10 9 9 8 12 16 20 20 18
VRATE KT-FT/1K..3 4 4 5 10 16 19 56 120 195 147 92
SMOKEDISPERSION.P P P P P P P F VG E VG G
FORECAST DAYS 3 THROUGH 5
WEDNESDAY
COOLER. PARTLY CLOUDY. LOWS IN THE LOWER 30S. HIGHS IN THE UPPER
50S. NORTHEAST WINDS AROUND 9 MPH.
THURSDAY
WARMER. PARTLY CLOUDY. LOWS IN THE UPPER 30S. HIGHS IN THE LOWER
70S. SOUTHWEST WINDS AROUND 10 MPH.
FRIDAY
MOSTLY CLOUDY. LOWS IN THE MID 40S. HIGHS IN THE MID 70S.
SOUTHWEST WINDS AROUND 13 MPH.
FORECASTER...BARJENBRUCH
REQUESTED BY...SCOTT WHITEAKER
TYPE OF REQUEST...PRESCRIBED
.TAG 2605092.0/BOU
.DELDT 03/09/26
.FORMATTERVERSION 2.0.0
.EMAIL SCOTT_WHITEAKER@FWS.GOV
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page