428
FNUS75 KBOU 231601
FWSBOU
SPOT FORECAST FOR HARTMAN HILL...NORTHERN COLORADO INTERAGENCY
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
1001 AM MDT THU JUL 23 2026
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
WINDS WILL INCREASE TO 5 TO 10 MPH OUT OF THE WEST/SOUTHWEST WITH
OCCASIONAL GUSTS AROUND 15 TO 20 MPH THIS AFTERNOON. TEMPERATURES
WILL WARM INTO THE UPPER 70S AND MINIMUM RHS WILL DROP TO AROUND
46% THIS AFTERNOON. ISOLATED SHOWERS WILL BE POSSIBLE LATE THIS
MORNING, BUT RAIN AND THUNDERSTORM CHANCES REALLY START TO
INCREASE AROUND NOON AND THEN DECREASE IN THE EVENING. HEAVY
RAINFALL, LIGHTNING, AND GUSTY ERRATIC WINDS COULD ACCOMPANY ANY
STORM THIS AFTERNOON.
OVERNIGHT, WE'LL SEE DECENT MOISTURE RECOVERY WITH RELATIVE
HUMIDITIES INCREASING BACK AROUND 75% AND LIGHT AND VARIABLE
WINDS. TOMORROW, AFTERNOON TEMPERATURES WILL WARM INTO THE MID 80S
AND RELATIVE HUMIDITIES WILL DROP CLOSER TO 25%. WINDS ON FRIDAY
WILL GENERALLY REMAIN ON THE LIGHTER SIDE, WITH OCCASIONAL
NORTHWEST GUSTS AROUND 15MPH. RAIN CHANCES ON FRIDAY WILL BE MUCH
LOWER (<15% CHANCE) COMPARED TO TODAY.
REST OF TODAY
SKY/WEATHER.........MOSTLY CLOUDY (65-75 PERCENT). SLIGHT CHANCE OF
RAIN SHOWERS UNTIL 0900, THEN CHANCE OF RAIN
SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS
UNTIL 1200, THEN RAIN SHOWERS WITH
THUNDERSTORMS LIKELY.
CWR.................7 PERCENT INCREASING TO 75 PERCENT IN THE
AFTERNOON.
CHANCE OF THUNDER...65 PERCENT.
MAX TEMPERATURE.....AROUND 78.
MIN HUMIDITY........46 PERCENT.
WIND (20 FT)........VARIABLE UP TO 5 MPH UNTIL 0800, THEN WEST 5 TO
7 MPH UNTIL 1400, THEN 5 TO 12 MPH. GUSTY AND
ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS AFTER
0900.
MIXING HEIGHT.......BELOW 1000 FT AGL UNTIL 0800. 4000 FT AGL AFTER
1100.
TRANSPORT WINDS.....SOUTHWEST AROUND 8 MPH UNTIL 1100, THEN WEST.
SMOKE DISPERSAL.....POOR UNTIL 1200, THEN FAIR UNTIL 1500, THEN
POOR.
TIME (MDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........64 52 73 73 73 92 92 92 91 91 91
WEATHER COV.....SCH SCH CHC CHC CHC DEF DEF DEF DEF DEF DEF
WEATHER TYPE....RW RW RW RW RW RW RW RW RW RW RW
TSTM COV........ SCH SCH SCH LKY LKY LKY LKY LKY LKY
CWR.............10 10 0 0 0 80 80 80 70 70 70
CHC OF THDR (%).0 0 20 20 20 60 60 60 70 70 70
TEMP............59 63 65 71 74 76 75 75 76 75 76
RH..............93 89 79 65 58 54 50 48 48 47 47
20 FT WIND DIR..SW W W W W W W W W W W
20 FT WIND SPD..2 3 3 5 6 7 7 7 7 7 7
20 FT WIND GUST.3 6 6 7 7 9 9 9 9 9
MIX HGT (KFT)...0.6 1.0 1.8 2.9 4.2 5.0 4.4 4.5 3.0 2.7 2.8
TRANSP WIND DIR.SW SW SW W W W W W W W W
TRANSP WIND SPD.3 5 6 7 10 10 12 12 10 9 9
VRATE KT-FT/1K..2 4 9 18 38 45 44 45 27 22 23
SMOKEDISPERSION.P P P P P F F F P P P
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (55-65 PERCENT) UNTIL 2200, THEN
PARTLY CLOUDY (25-35 PERCENT). CHANCE OF RAIN
SHOWERS AND THUNDERSTORMS UNTIL 2100, THEN
SLIGHT CHANCE OF RAIN SHOWERS AND THUNDERSTORMS
UNTIL 2400.
CWR.................21 PERCENT DECREASING TO 1 PERCENT OVERNIGHT.
CHANCE OF THUNDER...44 PERCENT.
MIN TEMPERATURE.....AROUND 57.
MAX HUMIDITY........75 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 5 TO 7 MPH UNTIL 2000, THEN
VARIABLE UP TO 5 MPH. GUSTY AND ERRATIC WINDS
EXPECTED NEAR THUNDERSTORMS UNTIL 2400.
MIXING HEIGHT.......2000 FT AGL UNTIL 2000, THEN BELOW 1000 FT AGL.
TRANSPORT WINDS.....WEST AROUND 8 MPH UNTIL 2100, THEN SOUTH UNTIL
2300, THEN SOUTHWEST UNTIL 0100, THEN SOUTHWEST
AROUND 8 MPH UNTIL 0500, THEN LIGHT.
SMOKE DISPERSAL.....POOR.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........70 70 70 52 43 43 23 19 18 22 27 22
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.............20 20 20 10 10 10 0 0 0 0 0 0
CHC OF THDR (%).40 40 40 20 20 20 0 0 0 0 0 0
TEMP............75 73 69 68 65 65 65 63 62 61 59 59
RH..............46 49 54 56 62 59 57 59 61 63 69 69
20 FT WIND DIR..W SW S S S S S S S S S S
20 FT WIND SPD..6 5 3 2 2 2 2 2 2 2 2 1
20 FT WIND GUST.7 6 6 3 3 3 3 3 5 5 5 3
MIX HGT (KFT)...2.6 2.0 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.5
TRANSP WIND DIR.W W W S S S SW S SW SW SW SW
TRANSP WIND SPD.8 6 5 5 6 5 5 5 5 5 5 5
VRATE KT-FT/1K..18 10 3 2 3 2 2 2 2 2 2 2
SMOKEDISPERSION.P P P P P P P P P P P P
FRIDAY
SKY/WEATHER.........MOSTLY SUNNY (10-20 PERCENT) UNTIL 1500, THEN
PARTLY CLOUDY (30-40 PERCENT).
CWR.................3 PERCENT.
CHANCE OF THUNDER...11 PERCENT.
MAX TEMPERATURE.....AROUND 88.
MIN HUMIDITY........23 PERCENT.
WIND (20 FT)........VARIABLE UP TO 5 MPH UNTIL 1200, THEN NORTHWEST
5 TO 7 MPH UNTIL 1700, THEN AROUND 6 MPH.
MIXING HEIGHT.......BELOW 1000 FT AGL UNTIL 0800. 7700 FT AGL AFTER
1300.
TRANSPORT WINDS.....LIGHT WINDS UNTIL 0900, THEN NORTHWEST 8 TO 9
MPH UNTIL 1500, THEN 8 TO 10 MPH.
SMOKE DISPERSAL.....POOR UNTIL 1400, THEN FAIR UNTIL 1600, THEN
POOR UNTIL 1700, THEN FAIR.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........19 19 16 16 7 16 14 23 25 33 35 32
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 10 0 0 0 0
TEMP............58 58 63 66 74 78 83 84 85 86 86 87
RH..............71 75 69 65 51 44 36 32 28 27 25 25
20 FT WIND DIR..S S SW W W W NW NW NW NW NW NW
20 FT WIND SPD..1 1 1 1 2 3 5 6 6 6 6 6
20 FT WIND GUST.3 3 3 3 6 8 10 12 12 13 13 13
MIX HGT (KFT)...0.6 0.6 1.3 2.2 3.1 5.0 6.5 8.2 8.0 8.3 7.2 6.0
TRANSP WIND DIR.SW S SW NW NW NW NW NW W W W NW
TRANSP WIND SPD.3 3 3 6 7 7 6 6 6 6 6 8
VRATE KT-FT/1K..2 2 4 11 19 30 33 33 40 42 36 42
SMOKEDISPERSION.P P P P P P P P F F P F
FORECASTER...MEIER
REQUESTED BY...BRANDY HILL
TYPE OF REQUEST...WILDFIRE
.TAG 2618055.0/BOU
.DELDT 07/23/26
.FORMATTERVERSION 2.0.0
.EMAIL CONCC@FIRENET.GOV,CHARLES.MCARTHUR@STATE.CO.US
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