090
FNUS75 KBOU 080958
FWSBOU
SPOT FORECAST FOR OBRIEN 2 RX...USFS
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
358 AM MDT THU OCT 8 2026
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
SUNNY CONDITIONS TO START THE DAY WITH LIGHT (<7 MPH) WEST WINDS.
WINDS WILL REMAIN LIGHT, SHIFTING TO THE SOUTH AS THE AFTERNOON
PROGRESSES. THERE IS A 20% CHANCE FOR AN ISOLATED SHOWER AND A FEW
LIGHTNING STRIKES, MAINLY BETWEEN 1500 AND 1800. HOWEVER, THE
CHANCE FOR WETTING RAINFALL IS NEAR ZERO. BRIEF ERRATIC GUSTY
WINDS UP TO 30 MPH WILL BE POSSIBLE WITH ANY SHOWERS THAT DEVELOP
NEAR THE BURN AREA. MINIMUM RELATIVE HUMIDITY WILL BE AROUND 15%
AND SMOKE DISPERSAL WILL RANGE FROM FAIR TO GOOD IN THE AFTERNOON.
OVERNIGHT HUMIDITY RECOVERY IS EXPECTED TO REACH 60-70% AT THE
AVERAGE ELEVATION OF THE BURN, WITH HIGHER HUMIDITY RECOVERY
POSSIBLE TOWARDS THE LOWER ELEVATIONS OF THE BURN AREA AS HAS BEEN
OBSERVED BY THE NEARBY RAWS STATIONS DUE TO AN EARLY MORNING
INVERSION LAYER. WINDS SHOULD PICK UP LATE TONIGHT AND INTO FRIDAY
MORNING, WITH WEST TO SOUTHWEST DOWNSLOPING WINDS AT AROUND 10
MPH, WITH 20 MPH GUSTS. SMOKE DISPERSAL WILL BE VERY GOOD THROUGH
MOST OF THE AFTERNOON FRIDAY.
REST OF TODAY
SKY/WEATHER.........SUNNY (0-10 PERCENT) UNTIL 1200, THEN PARTLY
CLOUDY (30-40 PERCENT). SLIGHT CHANCE OF RAIN
SHOWERS AFTER 1200.
CWR.................5 PERCENT.
CHANCE OF PCPN......20 PERCENT.
CHANCE OF THUNDER...14 PERCENT.
MAX TEMPERATURE.....AROUND 71.
MIN HUMIDITY........18 PERCENT.
WIND (20 FT)........WEST WINDS 5 TO 7 MPH UNTIL 1500. SOUTH
AROUND 6 MPH AFTER 1700.
MIXING HEIGHT.......BELOW 1000 FT AGL UNTIL 1000, THEN 1800 FT AGL
UNTIL 1100, THEN 7900 FT AGL UNTIL 1300, THEN
11400 FT AGL UNTIL 1700, THEN 8000 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 8 TO 12 MPH UNTIL 1700, THEN SOUTH
AROUND 9 MPH.
SMOKE DISPERSAL.....POOR UNTIL 1100, THEN FAIR UNTIL 1200, THEN
GOOD.
TIME (MDT) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........3 2 2 2 33 33 33 33 38 38
WEATHER COV..... SCH SCH SCH SCH SCH SCH
WEATHER TYPE.... RW RW RW RW RW RW
TSTM COV........
CWR.............0 0 0 0 10 10 10 10 10 10
CHC OF PCPN (%).0 0 0 0 20 20 20 20 20 20
CHC OF THDR (%).0 0 0 0 10 10 10 10 10 10
TEMP............42 49 58 63 67 69 70 71 70 67
RH..............76 63 44 35 25 21 19 18 20 23
20 FT WIND DIR.. W W W W W SW SW S S S
20 FT WIND SPD..5 5 5 6 6 6 5 6 6 6
20 FT WIND GUST.8 9 9 10 10 10 9 12 12 12
MIX HGT (KFT)...0.5 0.7 1.8 6.2 8.6 11 12 11 10 8.0
TRANSP WIND DIR.W W W W W W W SW SW S
TRANSP WIND SPD.9 9 10 10 9 9 8 9 8 9
VRATE KT-FT/1K..4 5 16 56 69 84 82 88 71 64
SMOKEDISPERSION.P P P F G G G G G G
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (45-55 PERCENT) UNTIL 1900, THEN
MOSTLY CLOUDY (50-60 PERCENT) UNTIL 2000, THEN
PARTLY CLOUDY (25-35 PERCENT) UNTIL 2400, THEN
CLEAR (0-10 PERCENT). SLIGHT CHANCE OF RAIN
SHOWERS UNTIL 2000.
CWR.................5 PERCENT.
CHANCE OF PCPN......20 PERCENT.
CHANCE OF THUNDER...7 PERCENT.
MIN TEMPERATURE.....AROUND 39.
MAX HUMIDITY........79 PERCENT.
WIND (20 FT)........SOUTHEAST WINDS 5 TO 7 MPH UNTIL 2000, THEN
SOUTH AROUND 5 MPH UNTIL 2100, THEN WEST 5 TO 7
MPH UNTIL 0200, THEN VARIABLE UP TO 5 MPH UNTIL
0300, THEN WEST 5 TO 7 MPH UNTIL 0500, THEN
VARIABLE UP TO 5 MPH.
MIXING HEIGHT.......BELOW 1000 FT AGL.
TRANSPORT WINDS.....SOUTH AROUND 10 MPH UNTIL 1900, THEN NORTHEAST
8 TO 11 MPH UNTIL 2100, THEN SOUTHWEST AROUND 8
MPH UNTIL 2200, THEN 8 TO 11 MPH.
SMOKE DISPERSAL.....POOR.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........48 57 50 28 16 8 4 2 2 2 4 3
WEATHER COV.....SCH SCH
WEATHER TYPE....RW RW
TSTM COV........
CWR.............10 10 0 0 0 0 0 0 0 0 0 0
CHC OF PCPN (%).20 20 10 10 0 0 0 0 0 0 0 0
CHC OF THDR (%).10 10 0 0 0 0 0 0 0 0 0 0
TEMP............64 58 54 51 48 47 46 44 43 42 40 40
RH..............29 40 47 54 63 65 68 70 73 73 79 76
20 FT WIND DIR..SE SE S W W W W W W W W W
20 FT WIND SPD..6 5 5 5 5 5 5 5 3 5 5 3
20 FT WIND GUST.12 9 9 9 8 8 8 8 7 8 8 7
MIX HGT (KFT)...0.9 0.7 0.5 0.4 0.4 0.5 0.4 0.5 0.5 0.4 0.6 0.5
TRANSP WIND DIR.S NE NE SW SW SW SW SW W W W W
TRANSP WIND SPD.10 9 8 8 7 7 8 8 8 9 9 9
VRATE KT-FT/1K..8 5 3 3 3 3 3 3 3 3 5 4
SMOKEDISPERSION.P P P P P P P P P P P P
FRIDAY
SKY/WEATHER.........MOSTLY SUNNY (5-15 PERCENT) UNTIL 1600, THEN
PARTLY CLOUDY (25-35 PERCENT) UNTIL 1700, THEN
MOSTLY SUNNY (20-30 PERCENT).
CWR.................2 PERCENT.
CHANCE OF PCPN......10 PERCENT.
CHANCE OF THUNDER...5 PERCENT.
MAX TEMPERATURE.....AROUND 70.
MIN HUMIDITY........18 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 6 TO 12 MPH WITH GUSTS TO
AROUND 23 MPH.
MIXING HEIGHT.......BELOW 1000 FT AGL UNTIL 1000. 10000 FT AGL
AFTER 1300.
TRANSPORT WINDS.....WEST 8 TO 16 MPH UNTIL 1500, THEN SOUTHWEST 15
TO 20 MPH.
SMOKE DISPERSAL.....POOR UNTIL 1100, THEN GOOD UNTIL 1200, THEN
VERY GOOD UNTIL 1500, THEN EXCELLENT UNTIL
1600, THEN VERY GOOD.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........4 5 3 2 3 3 6 9 10 18 29 24
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 10 10 10 10
CHC OF THDR (%).0 0 0 0 0 0 0 0 10 10 10 10
TEMP............40 39 41 48 56 62 67 68 69 70 68 67
RH..............76 79 76 71 53 36 25 22 20 18 20 22
20 FT WIND DIR..SW SW SW W W W SW SW SW SW SW SW
20 FT WIND SPD..3 3 5 5 7 9 10 10 10 12 12 14
20 FT WIND GUST.7 7 9 9 12 16 18 18 18 21 21 23
MIX HGT (KFT)...0.5 0.5 0.5 0.8 2.7 5.3 7.7 8.7 9.3 10 9.8 9.1
TRANSP WIND DIR.W SW SW W W W W SW SW SW SW W
TRANSP WIND SPD.8 9 10 13 13 15 16 16 16 18 17 16
VRATE KT-FT/1K..3 4 4 9 30 69 107 122 131 163 147 127
SMOKEDISPERSION.P P P P P G VG VG VG E VG VG
FORECASTER...APONTE
REQUESTED BY...MICHAEL WICKS
TYPE OF REQUEST...PRESCRIBED
.TAG 2623255.1/BOU
.DELDT 10/08/26
.FORMATTERVERSION 2.0.0
.EMAIL CHAD.BLAKE@USDA.GOV,MICHAEL.T.WICKS@USDA.GOV
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