278
FNUS75 KBOU 232312
FWSBOU
SPOT FORECAST FOR CATALPA PLACE FIRE...NWS BOULDER
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
512 PM MDT THU APR 23 2026
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
..RED FLAG WARNING IN EFFECT UNTIL 7 PM MDT THIS EVENING
..RED FLAG WARNING IN EFFECT FROM 11 AM TO 8 PM MDT FRIDAY
DISCUSSION
GUSTY WEST WINDS AS HIGH AS 30 MPH ARE EXPECTED TO DECREASE
TO 10-15 MPH BY 7-8 PM, AND THEN BECOME LIGHT AND UNDER 10 MPH BY
9 PM. HUMIDITY WILL SLOWLY RECOVER BUT WILL BE AS LOW AS 15% UNTIL
6 PM, THEN GRADUALLY IMPROVING WITH ONLY POOR TO MODERATE HUMIDITY
RECOVERY OVERNIGHT.
FOR FRIDAY, WINDS WILL STAY LIGHT THROUGH ABOUT NOON, AND THEN
INCREASE AGAIN FOR THE AFTERNOON WITH GUSTS AROUND 25-30 MPH
EXPECTED. RED FLAG CONDITIONS ARE EXPECTED TO REDEVELOP AS WINDS
INCREASE AND HUMIDITY DROPS INTO THE 10-14% RANGE.
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (60-70 PERCENT) UNTIL 2000, THEN
MOSTLY CLEAR (15-25 PERCENT).
CWR.................2 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MIN TEMPERATURE.....AROUND 36.
MAX HUMIDITY........52 PERCENT.
WIND (20 FT)........WEST-NORTHWEST WINDS 11 TO 19 MPH WITH GUSTS TO
AROUND 30 MPH UNTIL 1900, THEN DECREASING TO
10-15 MPH BY 2000, THEN LESS THAN 10 MPH BY 2100.
SOUTHWEST AROUND 5 MPH OVERNIGHT.
MIXING HEIGHT.......7200 FT AGL UNTIL 1900. BELOW 1000 FT AGL AFTER
2200.
TRANSPORT WINDS.....WEST 21 TO 26 MPH UNTIL 2000, THEN 9 TO 14 MPH
UNTIL 2300, THEN SOUTHWEST AROUND 8 MPH UNTIL
2400, THEN SOUTH 8 TO 9 MPH UNTIL 0200, THEN
LIGHT UNTIL 0400, THEN NORTHWEST AROUND 8 MPH.
SMOKE DISPERSAL.....EXCELLENT UNTIL 1900. POOR AFTER 0400.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........70 60 28 14 11 13 14 13 11 11 12 12
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............57 56 52 50 47 46 44 43 41 39 39 38
RH..............21 22 27 30 34 35 38 39 44 48 46 48
20 FT WIND DIR..NW NW NW NW NW W W NW NW N NW SW
20 FT WIND SPD..18 15 12 8 7 6 6 6 7 7 6 5
20 FT WIND GUST.30 24 18 13 12 9 9 9 12 12 9 7
MIX HGT (KFT)...7.2 5.0 1.3 1.0 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8
TRANSP WIND DIR.W W W W W SW S S S N NW NW
TRANSP WIND SPD.25 22 14 10 9 8 7 6 7 7 6 5
VRATE KT-FT/1K..159 95 15 9 7 6 5 4 5 5 4 3
SMOKEDISPERSION.E G P P P P P P P P P P
FRIDAY
SKY/WEATHER.........MOSTLY SUNNY (10-20 PERCENT) UNTIL 1700, THEN
PARTLY CLOUDY (25-35 PERCENT).
CWR.................3 PERCENT.
CHANCE OF THUNDER...6 PERCENT.
MAX TEMPERATURE.....AROUND 66.
MIN HUMIDITY........12 PERCENT.
WIND (20 FT)........VARIABLE UP TO 5 MPH UNTIL 0900, THEN SOUTH 6
TO 12 MPH UNTIL 1200, THEN SOUTHWEST 14 TO 22
MPH WITH GUSTS TO AROUND 30 MPH UNTIL 1400,
THEN WEST WITH GUSTS TO AROUND 30 MPH.
MIXING HEIGHT.......BELOW 1000 FT AGL UNTIL 0800. 14700 FT AGL
AFTER 1200.
TRANSPORT WINDS.....LIGHT WINDS UNTIL 0700. WEST 20 TO 28 MPH AFTER
1100.
SMOKE DISPERSAL.....POOR UNTIL 0900, THEN FAIR UNTIL 1000, THEN
GOOD UNTIL 1100, THEN EXCELLENT.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........13 17 16 11 10 13 15 19 16 18 23 31
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 10 10 10 0 0 0
TEMP............36 38 42 47 52 56 59 61 63 64 65 65
RH..............52 48 41 35 29 24 20 18 16 15 14 14
20 FT WIND DIR..SW S S S S SW SW SW W W W W
20 FT WIND SPD..3 5 7 9 13 15 17 18 18 18 18 18
20 FT WIND GUST.6 7 12 15 21 24 28 30 30 30 30 30
MIX HGT (KFT)...0.7 0.8 1.7 4.4 6.7 9.2 12 14 15 15 15 14
TRANSP WIND DIR.W S S SW SW W W W W W W W
TRANSP WIND SPD.5 6 7 12 16 20 22 24 26 28 28 28
VRATE KT-FT/1K..3 4 10 44 94 156 230 285 333 366 354 338
SMOKEDISPERSION.P P P F G E E E E E E E
FORECASTER...BARJENBRUCH
REQUESTED BY...NWS BOULDER
TYPE OF REQUEST...WILDFIRE
.TAG 2611547.0/BOU
.DELDT 04/23/26
.FORMATTERVERSION 2.0.0
.EMAIL NWS.BOULDER@NOAA.GOV
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