714
FNUS75 KBOU 261023
FWSBOU
SPOT FORECAST FOR IRONCLAD...USFS
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
423 AM MDT WED AUG 26 2026
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
CURRENT CONDITIONS NEAR THE FIRE SHOW LIGHT (UNDER 8-10 MPH) AND
GENERALLY VARIABLE WINDS. EXPECT THAT TREND TO CONTINUE THROUGH
THE MORNING, BEFORE LIGHT UPSLOPE WINDS GET ESTABLISHED BY
1100-1300 LOCAL TIME. WITH A RELATIVELY SATURATED ENVIRONMENT, RH
VALUES SHOULD ONLY DROP TO AROUND 40%.
IN THE AFTERNOON, SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED
TO DEVELOP NEAR THE FIRE AND SHOULD PRODUCE WETTING RAIN. BEST
CHANCE WILL BE CLOSER TO 1400-1800 LOCAL TIME. LIGHTING AND GUSTY
ERRATIC OUTFLOW WINDS WILL BE THE MAIN CONCERN. HOWEVER, SMALL
HAIL IS ALL POSSIBLE. AFTER THE STORMS EXIT THE AREA EARLY THIS
EVENING, THERE MAY BE A PERIOD OF EAST/SOUTHEAST WINDS OF 10-20
MPH DUE TO OUTFLOW BOUNDARIES. HOWEVER, WINDS SHOULD DECREASE AND
GRADUALLY TURN SOUTH/SOUTHWEST. OVERNIGHT HUMIDITY RECOVERIES
SHOULD BE AROUND 70%.
FOR THURSDAY, EXPECT GENERALLY LIGHT (UNDER 10-15 MPH) WINDS
THROUGHOUT THE DAY, WITH RH DROPPING TO AROUND 30%. SHOWERS AND
THUNDERSTORMS ARE POSSIBLE, HOWEVER COVERAGE WILL BE MORE LIMITED.
LIGHTING AND GUSTY OUTFLOW WINDS WILL BE THE MAIN THREAT.
TODAY
SKY/WEATHER.........PARTLY CLOUDY (25-35 PERCENT) UNTIL 1200, THEN
MOSTLY CLOUDY (55-65 PERCENT). CHANCE OF RAIN
SHOWERS AND THUNDERSTORMS AFTER 1200.
CWR.................3 PERCENT INCREASING TO 30 PERCENT.
CHANCE OF THUNDER...46 PERCENT.
MAX TEMPERATURE.....AROUND 70.
MIN HUMIDITY........40 PERCENT.
WIND (20 FT)........WEST WINDS AROUND 6 MPH UNTIL 0700, THEN
NORTHWEST AROUND 5 MPH UNTIL 0800, THEN
VARIABLE UP TO 5 MPH UNTIL 1100, THEN EAST 5 TO
7 MPH. GUSTY AND ERRATIC WINDS EXPECTED NEAR
THUNDERSTORMS AFTER 1200.
MIXING HEIGHT.......BELOW 1000 FT AGL UNTIL 0900. 5500 FT AGL AFTER
1100.
TRANSPORT WINDS.....WEST 8 TO 11 MPH UNTIL 0900, THEN NORTHWEST
AROUND 8 MPH UNTIL 1100, THEN 8 TO 10 MPH UNTIL
1400, THEN EAST AROUND 8 MPH UNTIL 1500, THEN
WEST UNTIL 1600, THEN NORTHEAST 8 TO 11 MPH.
SMOKE DISPERSAL.....POOR UNTIL 1300, THEN FAIR UNTIL 1400, THEN
POOR.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........31 28 30 29 29 32 51 58 62 68 68 68
WEATHER COV..... CHC CHC CHC CHC CHC CHC
WEATHER TYPE.... RW RW RW RW RW RW
TSTM COV........ CHC CHC CHC CHC CHC CHC
CWR.............0 0 0 0 0 0 20 20 20 30 30 30
CHC OF THDR (%).0 0 0 0 0 10 30 30 30 50 50 50
TEMP............54 55 62 64 67 68 69 67 67 64 64 63
RH..............57 57 46 45 40 40 40 45 47 54 54 56
20 FT WIND DIR..W NW N NE NE E E E E E E E
20 FT WIND SPD..6 5 3 2 3 5 6 6 6 6 6 5
20 FT WIND GUST.9 7 6 3 6 7 9 9 9 9 9 7
MIX HGT (KFT)...0.6 0.6 0.5 2.3 4.0 6.1 6.6 6.1 5.6 4.8 4.6 4.0
TRANSP WIND DIR.W W W NW NW N E E E E NE NE
TRANSP WIND SPD.8 9 8 5 5 6 7 8 8 8 8 8
VRATE KT-FT/1K..4 5 4 9 16 30 40 43 39 34 32 28
SMOKEDISPERSION.P P P P P P P F P P P P
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (55-65 PERCENT) UNTIL 2200, THEN
PARTLY CLOUDY (25-35 PERCENT).
CWR.................4 PERCENT.
CHANCE OF THUNDER...12 PERCENT.
MIN TEMPERATURE.....AROUND 52.
MAX HUMIDITY........72 PERCENT.
WIND (20 FT)........EAST WINDS AROUND 5 MPH UNTIL 1900, THEN
VARIABLE UP TO 5 MPH UNTIL 0400, THEN WEST 5 TO
7 MPH.
MIXING HEIGHT.......1300 FT AGL UNTIL 2000, THEN BELOW 1000 FT AGL.
TRANSPORT WINDS.....SOUTHEAST 8 TO 9 MPH UNTIL 2000, THEN EAST
AROUND 8 MPH UNTIL 2200, THEN SOUTH UNTIL 2400,
THEN SOUTHWEST 8 TO 10 MPH UNTIL 0200, THEN
LIGHT UNTIL 0300, THEN WEST 9 TO 14 MPH.
SMOKE DISPERSAL.....POOR.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........63 59 65 59 40 37 40 39 31 29 28 23
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
CHC OF THDR (%).10 10 10 0 0 0 0 0 0 0 0 0
TEMP............62 59 55 54 54 54 54 54 53 55 55 56
RH..............56 62 72 71 71 71 71 66 66 57 55 51
20 FT WIND DIR..E SE SW W W W W W W W W W
20 FT WIND SPD..5 3 2 2 2 3 3 3 3 3 5 5
20 FT WIND GUST.7 6 3 3 3 6 6 6 6 6 7 7
MIX HGT (KFT)...2.3 1.3 0.6 0.5 0.5 0.6 0.5 0.6 0.6 0.6 0.6 0.5
TRANSP WIND DIR.E SE E SE S SW SW W W W W W
TRANSP WIND SPD.6 6 6 5 5 6 7 7 7 10 12 13
VRATE KT-FT/1K..12 7 3 2 2 3 3 3 4 5 6 6
SMOKEDISPERSION.P P P P P P P P P P P P
THURSDAY
SKY/WEATHER.........MOSTLY SUNNY (15-25 PERCENT) UNTIL 1200, THEN
MOSTLY CLOUDY (55-65 PERCENT). CHANCE OF RAIN
SHOWERS AND THUNDERSTORMS AFTER 1200 UNTIL
1500, THEN SLIGHT CHANCE OF RAIN SHOWERS AND
THUNDERSTORMS.
CWR.................0 PERCENT INCREASING TO 13 PERCENT IN THE
AFTERNOON.
CHANCE OF THUNDER...32 PERCENT.
MAX TEMPERATURE.....AROUND 75.
MIN HUMIDITY........29 PERCENT.
WIND (20 FT)........WEST WINDS 5 TO 7 MPH UNTIL 1000, THEN VARIABLE
UP TO 5 MPH UNTIL 1200, THEN NORTHEAST AROUND 5
MPH UNTIL 1400, THEN VARIABLE UP TO 5 MPH UNTIL
1500, THEN NORTHEAST AROUND 5 MPH UNTIL 1700,
THEN VARIABLE UP TO 5 MPH. GUSTY AND ERRATIC
WINDS EXPECTED NEAR THUNDERSTORMS AFTER 1200.
MIXING HEIGHT.......BELOW 1000 FT AGL UNTIL 0900, THEN 1900 FT AGL
UNTIL 1000, THEN 7300 FT AGL UNTIL 1600, THEN
4600 FT AGL.
TRANSPORT WINDS.....NORTHWEST 8 TO 13 MPH.
SMOKE DISPERSAL.....POOR UNTIL 1000, THEN FAIR UNTIL 1100, THEN
GOOD UNTIL 1500, THEN POOR UNTIL 1700, THEN
FAIR.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........19 28 23 13 12 22 58 55 68 61 58 56
WEATHER COV..... CHC CHC CHC SCH SCH SCH
WEATHER TYPE.... RW RW RW RW RW RW
TSTM COV........ CHC CHC CHC SCH SCH SCH
CWR.............0 0 0 0 0 0 10 10 10 10 10 10
CHC OF THDR (%).0 0 0 0 0 0 30 30 30 20 20 20
TEMP............57 58 65 67 71 72 74 72 72 69 68 67
RH..............47 47 38 34 30 30 29 33 34 39 40 43
20 FT WIND DIR..W W W W NW N NE E NE NE E S
20 FT WIND SPD..6 6 6 5 3 3 3 3 3 3 3 3
20 FT WIND GUST.12 13 13 10 10 10 10 10 9 10 9 9
MIX HGT (KFT)...0.6 0.5 0.7 1.9 6.2 8.0 9.0 8.2 6.7 5.6 4.0 4.6
TRANSP WIND DIR.W W W W NW NW NW NW NW W NW W
TRANSP WIND SPD.13 13 12 8 8 9 12 10 10 8 9 12
VRATE KT-FT/1K..7 6 7 13 43 64 90 74 60 39 32 46
SMOKEDISPERSION.P P P P F G G G G P P F
FORECAST DAYS 3 THROUGH 5
FRIDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS IN THE MID 50S. HIGHS IN THE UPPER 70S. WEST WINDS AROUND
5 MPH.
SATURDAY
MOSTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS IN THE UPPER 50S. HIGHS IN THE MID 70S. WEST WINDS AROUND
7 MPH.
SUNDAY
MOSTLY CLOUDY WITH SHOWERS LIKELY AND CHANCE OF THUNDERSTORMS.
LOWS IN THE MID 50S. HIGHS IN THE LOWER 70S. WEST WINDS AROUND
6 MPH.
FORECASTER...IDEKER
REQUESTED BY...NWS BOULDER
TYPE OF REQUEST...WILDFIRE
.TAG 2620556.0/BOU
.DELDT 08/26/26
.FORMATTERVERSION 2.0.0
.EMAIL KAREENA.TULLOCH@USDA.GOV,ANDREW.EPP@USDA.GOV
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