113
FNUS75 KBOU 051143
FWSBOU
SPOT FORECAST FOR 31A...USFWS
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
443 AM MST THU MAR 5 2026
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
TODAY WILL BE WARM AND DRY WITH RELATIVE HUMIDITY
DROPPING TO 13 PERCENT. LIGHT WINDS IN THE MORNING WILL INCREASE
OUT OF THE SOUTH IN THE AFTERNOON WITH GUSTS UP TO 30 MPH
POSSIBLE. THERE WILL BE EXCELLENT SMOKE DISPERSAL. THE TRICKY
PART OF THE FORECAST WILL BE FORECASTING WIND DIRECTION IN THE
LATE AFTERNOON. THERE WILL BE A BOUNDARY THAT WILL SETUP VERY
CLOSE TO THE SPOT LOCATION. IF THE BOUNDARY STAYS TO THE SOUTH,
GUSTY NORTHEAST WINDS WILL MOVE OVER THE SPOT LOCATION. IF THE
BOUNDARY SETS UP ON THE NORTH SIDE, SOUTH WINDS WILL CONTINUE INTO
THE EARLY EVENING. THE MOST LIKELY SCENARIO IS SOUTHERLY WINDS
THIS AFTERNOON BUT BE PREPARED FOR A POSSIBLE SHIFT TO NORTHEAST
WINDS.
THIS EVENING, A STRONG COLD FRONT WILL MOVE ACROSS DENVER WITH
NORTHERLY WINDS GUSTING UP TO 45 MPH FOR A SHORT TIME. THE NORTH
WINDS WILL CONTINUE THROUGH THE NIGHT AND TOWARDS SUNRISE ON
FRIDAY, SNOW WILL BEGIN TO FORM. THIS SNOW WILL BE MODERATE IN
INTENSITY AND 1-3" OF SNOW ACCUMULATION IS EXPECTED. SNOW WILL END
IN THE AFTERNOON BUT WITH GUSTY NORTHERLY WINDS CONTINUING, GOOD
SMOKE DISPERSAL IS FORECAST.
TODAY
SKY/WEATHER.........PARTLY CLOUDY (35-45 PERCENT).
CWR.................3 PERCENT.
CHANCE OF PCPN......10 PERCENT.
CHANCE OF THUNDER...8 PERCENT.
MAX TEMPERATURE.....AROUND 68.
MIN HUMIDITY........13 PERCENT.
WIND (20 FT)........SOUTH WINDS 5 TO 8 MPH UNTIL 1100. SOUTHWEST
AROUND 12 MPH WITH GUSTS TO AROUND 30 MPH AFTER
1700.
MIXING HEIGHT.......BELOW 1000 FT AGL UNTIL 1000, THEN 3700 FT AGL
UNTIL 1200, THEN 6900 FT AGL UNTIL 1300, THEN
9700 FT AGL UNTIL 1400, THEN 12000 FT AGL UNTIL
1600, THEN 8400 FT AGL UNTIL 1700, THEN 4400 FT
AGL.
TRANSPORT WINDS.....SOUTHWEST 8 TO 11 MPH UNTIL 0800, THEN SOUTH 8
TO 17 MPH.
SMOKE DISPERSAL.....POOR UNTIL 1200, THEN GOOD UNTIL 1300, THEN
VERY GOOD UNTIL 1400, THEN EXCELLENT UNTIL
1600, THEN VERY GOOD UNTIL 1700, THEN FAIR.
TIME (MST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........67 56 50 33 25 16 12 11 19 33 52 67
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
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0 10
TEMP............35 38 42 51 56 60 65 66 67 68 66 64
RH..............56 50 45 32 24 19 16 15 14 13 14 17
20 FT WIND DIR..SW SW S S S S S S SE S S SW
20 FT WIND SPD..6 6 6 6 6 6 7 9 10 12 12 12
20 FT WIND GUST.12 12 12 9 9 9 13 15 16 21 23 23
MIX HGT (KFT)...0.5 0.5 0.4 0.9 2.5 3.9 6.9 9.7 12 11 8.4 4.4
TRANSP WIND DIR.SW SW SW S S S S S S S S SW
TRANSP WIND SPD.8 8 6 7 8 9 13 15 16 17 16 14
VRATE KT-FT/1K..3 4 2 5 18 31 76 126 171 161 118 53
SMOKEDISPERSION.P P P P P P G VG E E VG F
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (60-70 PERCENT) UNTIL 2000, THEN
PARTLY CLOUDY (40-50 PERCENT) UNTIL 2200, THEN
MOSTLY CLOUDY (70-80 PERCENT). CHANCE OF RAIN.
SNOW AFTER 2400.
CWR.................4 PERCENT INCREASING TO 74 PERCENT.
CHANCE OF PCPN......100 PERCENT.
CHANCE OF THUNDER...8 PERCENT.
MIN TEMPERATURE.....AROUND 31.
MAX HUMIDITY........96 PERCENT.
WIND (20 FT)........WEST WINDS AROUND 12 MPH UNTIL 1900, THEN
NORTHWEST AROUND 13 MPH UNTIL 2000, THEN NORTH
9 TO 18 MPH UNTIL 0100, THEN 7 TO 12 MPH UNTIL
0500, THEN AROUND 12 MPH. GUSTS UP TO 45 MPH.
MIXING HEIGHT.......BELOW 1000 FT AGL UNTIL 2000, THEN 1200 FT AGL.
TRANSPORT WINDS.....NORTH 14 TO 21 MPH UNTIL 2300, THEN 15 TO 21
MPH.
SMOKE DISPERSAL.....POOR.
TIME (MST) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........68 58 47 46 51 64 63 60 69 82 88 98
WEATHER COV..... SCH SCH SCH CHC CHC CHC CHC CHC CHC DEF
WEATHER TYPE.... RN RN RN RN RN RN RN RN RN SN
TSTM COV........
CWR.............0 0 0 0 0 20 20 20 20 20 20 70
CHC OF PCPN (%).10 10 20 20 20 40 40 40 40 40 40 100
CHC OF THDR (%).10 10 10 10 10 10 10 10 10 10 10 0
TEMP............59 55 52 49 46 43 41 40 39 38 36 35
RH..............22 29 33 39 47 55 62 64 67 70 79 78
20 FT WIND DIR..W NW N N N N N N N N N N
20 FT WIND SPD..12 13 13 13 12 10 9 9 9 9 10 12
20 FT WIND GUST.23 23 23 25 25 22 23 23 21 22 22 22
MIX HGT (KFT)...0.8 0.9 1.1 1.6 1.4 1.2 1.3 1.4 1.6 1.7 2.2 2.0
TRANSP WIND DIR.NW N N N N N NE N N N N N
TRANSP WIND SPD.14 14 16 21 20 16 16 15 17 21 21 20
VRATE KT-FT/1K..9 11 15 29 24 17 19 18 24 31 39 34
SMOKEDISPERSION.P P P P P P P P P P P P
FRIDAY
SKY/WEATHER.........CLOUDY (90-100 PERCENT). SNOW UNTIL 1700, THEN
CHANCE OF SNOW.
CWR.................74 PERCENT DECREASING TO 9 PERCENT.
CHANCE OF PCPN......100 PERCENT.
CHANCE OF THUNDER...6 PERCENT.
MAX TEMPERATURE.....AROUND 37.
MIN HUMIDITY........59 PERCENT.
WIND (20 FT)........NORTH WINDS 13 TO 21 MPH WITH GUSTS TO AROUND
30 MPH.
MIXING HEIGHT.......4000 FT AGL.
TRANSPORT WINDS.....NORTH 17 TO 25 MPH.
SMOKE DISPERSAL.....POOR UNTIL 0900, THEN FAIR UNTIL 1100, THEN
GOOD.
TIME (MST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........98 98 98 98 98 98 98 98 98 98 98 88
WEATHER COV.....DEF DEF DEF DEF DEF DEF DEF DEF DEF DEF DEF CHC
WEATHER TYPE....SN SN SN SN SN SN SN SN SN SN SN SN
TSTM COV........
CWR.............70 70 70 70 70 40 40 40 40 40 40 10
CHC OF PCPN (%).100 100 100 100 100 90 90 90 90 90 90 50
CHC OF THDR (%).0 0 10 10 10 10 10 10 10 10 10 0
TEMP............33 32 33 34 34 34 35 36 37 37 37 36
RH..............89 96 96 92 89 85 78 72 67 64 59 59
20 FT WIND DIR..N N N N N N N N N N N N
20 FT WIND SPD..13 13 14 15 17 18 20 20 20 20 18 17
20 FT WIND GUST.23 24 25 26 28 29 30 30 30 30 29 28
MIX HGT (KFT)...2.1 2.3 2.4 2.7 2.9 3.1 3.4 3.6 3.9 3.9 3.9 4.0
TRANSP WIND DIR.N N N N N N N N N N N N
TRANSP WIND SPD.20 18 17 20 23 25 25 25 25 24 23 22
VRATE KT-FT/1K..36 36 37 45 58 68 74 79 85 82 79 76
SMOKEDISPERSION.P P P F F G G G G G G G
FORECASTER...DANIELSON
REQUESTED BY...SCOTT WHITEAKER
TYPE OF REQUEST...PRESCRIBED
.TAG 2604799.0/BOU
.DELDT 03/05/26
.FORMATTERVERSION 2.0.0
.EMAIL SCOTT_WHITEAKER@FWS.GOV
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