670
FNUS75 KBOU 120800
FWSBOU
SPOT FORECAST FOR TOWER MACHINE PILES...USFS
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
100 AM MST MON JAN 12 2026
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
WINDS WILL MAINTAIN A WESTERLY COMPONENT THROUGH
THE FORECAST PERIOD. ON MONDAY, WINDS ARE EXPECTED TO BE 15-20
MPH WITH GUSTS BETWEEN 25-30 MPH. TEMPERATURES WILL BE IN THE LOW
TO MID 30S WITH MINIMUM RELATIVE HUMIDITY VALUES BETWEEN 40-45%.
EXPECTING POOR SMOKE DISPERSAL THROUGH MONDAY WITH MIXING HEIGHTS
STAYING BELOW 1,500 FEET AND SUBSIDENCE ALOFT.
SLIGHTLY STRONGER WINDS AND HIGHER MIXING HEIGHTS ARE EXPECTED ON
TUESDAY THAT WILL ALLOW FOR A FEW HOURS OF FAIR SMOKE DISPERSAL
CONDITIONS AFTER NOON. WESTERLY WINDS ARE EXPECTED TO BE 15-25
MPH WITH GUSTS BETWEEN 35-40 MPH, AND MIXING HEIGHTS WILL CLIMB TO
ABOUT 1,800 FEET. RELATIVE HUMIDITY VALUES WILL ALSO BE SLIGHTLY
HIGHER, RANGING FROM 45-50% IN THE AFTERNOON.
TODAY
SKY/WEATHER.........PARTLY CLOUDY (25-35 PERCENT) UNTIL 0700, THEN
MOSTLY SUNNY (10-20 PERCENT).
CWR.................0 PERCENT.
CHANCE OF PCPN......0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....AROUND 34.
MIN HUMIDITY........42 PERCENT.
WIND (20 FT)........WEST WINDS 12 TO 20 MPH WITH GUSTS TO AROUND 29
MPH.
MIXING HEIGHT.......BELOW 1000 FT AGL UNTIL 1300, THEN 1300 FT AGL
UNTIL 1600, THEN BELOW 1000 FT AGL.
TRANSPORT WINDS.....WEST 18 TO 23 MPH.
SMOKE DISPERSAL.....POOR.
TIME (MST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........30 20 21 15 15 17 16 12 9 12 15 22
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 0 0 0 0
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............18 19 20 25 29 32 32 33 34 32 30 28
RH..............59 59 56 48 42 42 43 43 44 46 48 53
20 FT WIND DIR..W W W W W W W W W W W W
20 FT WIND SPD..17 16 16 15 15 15 15 15 16 16 16 16
20 FT WIND GUST.28 28 29 29 28 26 26 28 28 28 29 26
MIX HGT (KFT)...0.1 0.1 0.1 0.1 0.4 0.7 0.8 1.1 1.3 1.0 0.1 0.1
TRANSP WIND DIR.W W W W W W W W W W W W
TRANSP WIND SPD.20 20 20 20 20 21 22 23 23 22 18 18
VRATE KT-FT/1K..0 0 0 0 6 13 15 23 25 19 0 0
SMOKEDISPERSION.P P P P P P P P P P P P
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR (20-30 PERCENT).
CWR.................0 PERCENT.
CHANCE OF PCPN......0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MIN TEMPERATURE.....AROUND 19.
MAX HUMIDITY........71 PERCENT.
WIND (20 FT)........WEST WINDS 13 TO 21 MPH WITH GUSTS TO AROUND 32
MPH.
MIXING HEIGHT.......BELOW 1000 FT AGL.
TRANSPORT WINDS.....WEST 18 TO 23 MPH.
SMOKE DISPERSAL.....POOR.
TIME (MST) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........28 20 16 10 14 23 24 25 26 31 37 34
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 0 0 0 0
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............24 24 23 23 22 22 22 21 21 21 21 20
RH..............62 59 59 59 62 60 60 66 65 65 69 71
20 FT WIND DIR..W W W W W W W W W W W W
20 FT WIND SPD..16 15 15 15 15 15 16 17 18 18 17 16
20 FT WIND GUST.28 29 29 29 30 30 30 31 31 31 32 32
MIX HGT (KFT)...0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1
TRANSP WIND DIR.W W W W W W W W W W W W
TRANSP WIND SPD.18 20 20 20 20 20 20 21 21 22 23 21
VRATE KT-FT/1K..0 0 0 0 0 0 0 0 0 0 0 0
SMOKEDISPERSION.P P P P P P P P P P P P
TUESDAY
SKY/WEATHER.........MOSTLY CLOUDY (50-60 PERCENT) UNTIL 0800, THEN
PARTLY CLOUDY (40-50 PERCENT).
CWR.................4 PERCENT.
CHANCE OF PCPN......10 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....AROUND 33.
MIN HUMIDITY........48 PERCENT.
WIND (20 FT)........WEST WINDS 14 TO 22 MPH WITH GUSTS TO AROUND 37
MPH.
MIXING HEIGHT.......BELOW 1000 FT AGL UNTIL 1100, THEN 1800 FT AGL
UNTIL 1600, THEN BELOW 1000 FT AGL.
TRANSPORT WINDS.....WEST 24 TO 32 MPH.
SMOKE DISPERSAL.....POOR UNTIL 1200, THEN FAIR UNTIL 1500, THEN
POOR.
TIME (MST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........60 51 41 44 44 43 42 42 41 43 46 48
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 0 0 0 10
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............21 22 23 26 29 31 32 33 33 31 29 27
RH..............66 66 63 56 51 49 48 48 50 52 55 59
20 FT WIND DIR..W W W W W W W W W W W W
20 FT WIND SPD..17 17 17 17 17 17 17 18 18 18 18 18
20 FT WIND GUST.32 32 32 32 32 33 35 36 37 37 37 36
MIX HGT (KFT)...0.1 0.1 0.1 0.2 0.7 1.2 1.6 1.8 1.7 1.2 0.6 0.1
TRANSP WIND DIR.W W W W W W W W W W W W
TRANSP WIND SPD.24 24 25 26 29 31 32 32 32 31 29 28
VRATE KT-FT/1K..0 0 0 5 17 32 44 50 48 34 14 0
SMOKEDISPERSION.P P P P P P F F F P P P
FORECASTER...BONNER
REQUESTED BY...WILLIAM KALEY
TYPE OF REQUEST...PRESCRIBED
.TAG 2528649.0/BOU
.DELDT 01/12/26
.FORMATTERVERSION 2.0.0
.EMAIL WILL.KALEY@USDA.GOV
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