120
FNUS75 KBOU 022239
FWSBOU
SPOT FORECAST FOR SLACK WIESS...USFS
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
339 PM MST TUE DEC 2 2025
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
SNOW SHOWERS ARE EXPECTED TO LINGER INTO WEDNESDAY
WITH ADDITIONAL ACCUMULATION OF UP TO 4 INCHES. NORTH TO NORTHEAST
UPSLOPE WINDS MAY HELP KEEP SNOW SHOWERS GOING INTO THE
AFTERNOON HOURS. SMOKE DISPERSAL WILL BE POOR WEDNESDAY, BUT
IMPROVE TO FAIR TO GOOD FOR THURSDAY.
WEDNESDAY
SKY/WEATHER.........MOSTLY CLOUDY (75-85 PERCENT). PERIODS OF
SNOW, SLOWLY DECREASING IN THE AFTERNOON.
CWR.................34 PERCENT DECREASING TO 6 PERCENT.
CHANCE OF PCPN......70 PERCENT.
MAX TEMPERATURE.....AROUND 23.
MIN HUMIDITY........75 PERCENT.
WIND (20 FT)........NORTH WINDS 5 TO 12 MPH.
MIXING HEIGHT.......2500 FT AGL.
TRANSPORT WINDS.....NORTHEAST 8 TO 13 MPH.
SMOKE DISPERSAL.....POOR.
TIME (MST) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........96 95 95 96 95 93 91 81 72 61
WEATHER COV.....LKY LKY LKY LKY LKY LKY CHC CHC CHC SCH
WEATHER TYPE....SN SN SN SN SN SN SN SN SN SN
TSTM COV........
CWR.............30 30 30 10 10 10 20 20 20 10
CHC OF PCPN (%).70 70 70 60 60 60 40 40 40 20
TEMP............17 20 20 20 22 22 23 22 21 14
RH..............86 81 84 86 80 80 79 75 78 96
20 FT WIND DIR..NE N N N N N N N N N
20 FT WIND SPD..6 6 7 8 8 8 9 8 6 5
20 FT WIND GUST.9 9 12 13 13 13 15 13 9 7
MIX HGT (KFT)...1.2 1.4 1.7 2.2 2.6 2.9 2.8 2.2 1.7 1.1
TRANSP WIND DIR.N N N NE NE NE N NE NE N
TRANSP WIND SPD.8 8 9 10 10 10 10 10 12 8
VRATE KT-FT/1K..8 10 14 20 24 26 25 19 17 8
SMOKEDISPERSION.P P P P P P P P P P
WEDNESDAY NIGHT
SKY/WEATHER.........MOSTLY CLOUDY (45-55 PERCENT) UNTIL 2200, THEN
PARTLY CLOUDY (35-45 PERCENT). SLIGHT CHANCE OF
SNOW UNTIL 2000.
CWR.................6 PERCENT.
CHANCE OF PCPN......20 PERCENT.
MIN TEMPERATURE.....AROUND 4 ABOVE.
MAX HUMIDITY........96 PERCENT.
WIND (20 FT)........VARIABLE UP TO 5 MPH UNTIL 0100, THEN SOUTH 5
TO 8 MPH.
MIXING HEIGHT.......BELOW 1000 FT AGL.
TRANSPORT WINDS.....NORTH 8 TO 9 MPH UNTIL 2000, THEN NORTHEAST
AROUND 8 MPH UNTIL 2200, THEN LIGHT UNTIL 2300,
THEN SOUTHEAST AROUND 8 MPH UNTIL 0100, THEN
LIGHT UNTIL 0200, THEN SOUTH 8 TO 11 MPH.
SMOKE DISPERSAL.....POOR.
TIME (MST) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........51 51 47 58 48 37 37 36 36 36 35 35
WEATHER COV.....SCH SCH
WEATHER TYPE....SN SN
TSTM COV........
CWR.............10 10 0 0 0 0 0 0 0 0 0 0
CHC OF PCPN (%).20 20 10 10 10 0 0 0 0 0 0 0
TEMP............12 11 10 10 9 8 7 7 6 5 4 4
RH..............96 91 87 83 80 76 76 72 76 79 83 83
20 FT WIND DIR..N NE E E SE SE S S S S S S
20 FT WIND SPD..5 3 2 3 3 3 3 5 5 6 7 7
20 FT WIND GUST.7 6 3 6 6 6 6 7 7 9 12 12
MIX HGT (KFT)...0.8 0.9 0.8 0.9 0.9 0.9 0.9 0.8 0.8 0.8 0.9 0.9
TRANSP WIND DIR.N N N NE E SE SE S S S S S
TRANSP WIND SPD.7 5 5 5 5 5 5 7 8 8 9 9
VRATE KT-FT/1K..5 3 3 3 3 3 3 5 6 6 7 7
SMOKEDISPERSION.P P P P P P P P P P P P
THURSDAY
SKY/WEATHER.........PARTLY CLOUDY (30-40 PERCENT).
CWR.................4 PERCENT.
CHANCE OF PCPN......10 PERCENT.
MAX TEMPERATURE.....AROUND 23.
MIN HUMIDITY........59 PERCENT.
WIND (20 FT)........SOUTH WINDS 7 TO 12 MPH UNTIL 1000, THEN
SOUTHWEST 11 TO 16 MPH WITH GUSTS TO AROUND 25
MPH.
MIXING HEIGHT.......BELOW 1000 FT AGL UNTIL 0900, THEN 2600 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 10 TO 16 MPH UNTIL 1000, THEN WEST 18
TO 25 MPH UNTIL 1700, THEN AROUND 15 MPH.
SMOKE DISPERSAL.....POOR UNTIL 1100, THEN FAIR UNTIL 1300, THEN
GOOD UNTIL 1500, THEN FAIR UNTIL 1600, THEN
POOR.
TIME (MST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........38 41 44 39 34 29 34 39 44 42 41 39
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 10 10 10 10 10 10 10
TEMP............5 6 8 12 15 19 21 23 23 21 19 17
RH..............79 79 76 73 73 67 65 59 59 65 70 73
20 FT WIND DIR..S S S SW SW SW SW W W W SW SW
20 FT WIND SPD..8 8 9 10 12 13 15 15 15 14 13 12
20 FT WIND GUST.13 13 15 16 18 21 24 24 24 22 21 18
MIX HGT (KFT)...0.9 0.8 0.8 1.5 2.1 2.7 2.9 3.1 3.2 2.5 1.8 1.1
TRANSP WIND DIR.S SW SW SW W W W W W W W W
TRANSP WIND SPD.10 12 13 16 18 22 23 24 25 22 18 15
VRATE KT-FT/1K..8 8 9 20 34 52 58 64 71 48 29 15
SMOKEDISPERSION.P P P P P F F G G F P P
FORECASTER...MEIER
REQUESTED BY...MATTHEW POLLEY
TYPE OF REQUEST...PRESCRIBED
.TAG 2526907.0/BOU
.DELDT 12/02/25
.FORMATTERVERSION 2.0.0
.EMAIL SEAN.CAREY@USDA.GOV,KEVIN.THOMPSON@USDA.GOV,MATTHEW.POLLEY@USDA.GOV
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