937
FNUS75 KBOU 201110
FWSBOU
SPOT FORECAST FOR HARTMAN HILL FIRE...NORTHERN COLORADO INTERAGENCY DISPATCH CENTER
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
510 AM MDT MON JUL 20 2026
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
IT WILL BE PARTLY CLOUDY UNTIL 1500 WITH A SLIGHT
CHANCE OF SHOWERS AND THUNDERSTORMS. AFTER 1500, MOSTLY CLOUDY
WITH A CHANCE OF SHOWERS AND THUNDERSTORMS. MINIMUM HUMIDITY
IN THE AFTERNOON WILL BE AROUND 20 PERCENT. WINDS WILL BE LIGHT
AND VARIABLE AROUND 5 MPH UNTIL 1200, THEN NORTHEAST 5 TO 8 MPH.
WINDS WILL BE GUSTY AND ERRACTIC NEAR THUNDERSTORMS.
FOR TONIGHT, MOSTLY CLOUDY WITH A CHANCE OF SHOWERS AND THUNDERSTORMS
UNTIL 2100. HUMIDITY RECOVERY WILL BE AROUND 55 PERCENT OVERNIGHT.
WINDS WILL BE NORTHEAST 5 TO 8 MPH UNTIL 0400, THEN LIGHT EAST AROUND
5 MPH.
REST OF TODAY
SKY/WEATHER.........PARTLY CLOUDY (40-50 PERCENT) UNTIL 1500, THEN
MOSTLY CLOUDY (60-70 PERCENT). SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS AFTER 1200 UNTIL
1500, THEN CHANCE OF SHOWERS AND THUNDERSTORMS.
CWR.................7 PERCENT.
CHANCE OF THUNDER...40 PERCENT.
MAX TEMPERATURE.....AROUND 92.
MIN HUMIDITY........19 PERCENT.
WIND (20 FT)........VARIABLE UP TO 5 MPH UNTIL 1200, THEN NORTHEAST
5 TO 8 MPH. GUSTY AND ERRATIC WINDS EXPECTED
NEAR THUNDERSTORMS AFTER 1200.
MIXING HEIGHT.......2000 FT AGL UNTIL 1000, THEN 3600 FT AGL UNTIL
1100, THEN 9200 FT AGL UNTIL 1300, THEN 11800
FT AGL UNTIL 1600, THEN 8400 FT AGL.
TRANSPORT WINDS.....LIGHT WINDS UNTIL 0900, THEN NORTHEAST AROUND 8
MPH UNTIL 1100, THEN 8 TO 9 MPH UNTIL 1300,
THEN 8 TO 10 MPH UNTIL 1700, THEN EAST AROUND
12 MPH.
SMOKE DISPERSAL.....POOR UNTIL 1200, THEN FAIR UNTIL 1500, THEN
GOOD.
TIME (MDT) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........9 6 6 12 43 43 43 60 61 71
WEATHER COV..... SCH SCH SCH CHC CHC CHC
WEATHER TYPE.... RW RW RW RW RW RW
TSTM COV........ SCH SCH SCH CHC CHC CHC
CWR.............0 0 0 0 10 10 10 10 10 10
CHC OF THDR (%).0 0 0 0 20 20 20 40 40 40
TEMP............66 70 79 85 89 90 90 91 89 87
RH..............48 43 32 26 22 19 19 19 21 24
20 FT WIND DIR..NE N N N NE NE NE NE NE NE
20 FT WIND SPD..1 1 2 3 5 6 7 8 7 6
20 FT WIND GUST.2 2 3 6 7 7 9 12 13 13
MIX HGT (KFT)...1.1 2.0 3.6 7.6 9.8 11 12 11 8.9 6.9
TRANSP WIND DIR.E NE NE NE NE NE NE NE E E
TRANSP WIND SPD.2 5 5 6 7 6 7 8 8 12
VRATE KT-FT/1K..2 8 14 38 59 56 59 76 63 69
SMOKEDISPERSION.P P P P F F F G G G
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (55-65 PERCENT) UNTIL 2200, THEN
PARTLY CLOUDY (25-35 PERCENT). CHANCE OF
SHOWERS AND THUNDERSTORMS UNTIL 2100.
CWR.................11 PERCENT DECREASING TO 1 PERCENT OVERNIGHT.
CHANCE OF THUNDER...18 PERCENT.
MIN TEMPERATURE.....AROUND 60.
MAX HUMIDITY........55 PERCENT.
WIND (20 FT)........NORTHEAST WINDS 5 TO 7 MPH UNTIL 0400, THEN EAST
AROUND 5 MPH AFTER 0400. GUSTY AND ERRATIC
WINDS EXPECTED NEAR THUNDERSTORMS UNTIL 2100.
MIXING HEIGHT.......5700 FT AGL UNTIL 1900. BELOW 1000 FT AGL AFTER
2000.
TRANSPORT WINDS.....EAST 8 TO 12 MPH UNTIL 2200, THEN 8 TO 10 MPH
UNTIL 2400, THEN EAST 8 TO 10 MPH UNTIL 0400,
THEN 8 TO 9 MPH.
SMOKE DISPERSAL.....FAIR UNTIL 1900. POOR AFTER 0500.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........64 64 59 56 44 42 21 18 16 14 21 22
WEATHER COV.....CHC CHC CHC
WEATHER TYPE....RW RW RW
TSTM COV........CHC CHC CHC
CWR.............10 10 10 10 10 10 0 0 0 0 0 0
CHC OF THDR (%).20 20 20 10 10 10 0 0 0 0 0 0
TEMP............86 82 77 76 72 72 71 68 67 64 62 61
RH..............23 27 32 33 39 39 38 41 42 47 51 51
20 FT WIND DIR..NE E E E E E E E E E E E
20 FT WIND SPD..5 5 6 6 6 5 5 5 5 5 3 3
20 FT WIND GUST.9 7 7 9 7 7 7 7 7 7 6 6
MIX HGT (KFT)...5.7 3.9 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.5
TRANSP WIND DIR.E E E E E E E E E E E E
TRANSP WIND SPD.10 10 8 8 7 7 7 7 7 7 7 6
VRATE KT-FT/1K..51 35 4 4 3 4 3 3 4 4 3 3
SMOKEDISPERSION.F P P P P P P P P P P P
TUESDAY
SKY/WEATHER.........PARTLY CLOUDY (30-40 PERCENT) UNTIL 0800, THEN
MOSTLY SUNNY (10-20 PERCENT) UNTIL 1200, THEN
MOSTLY CLOUDY (65-75 PERCENT). CHANCE OF
SHOWERS AFTER 1200 UNTIL 1500. CHANCE OF
THUNDERSTORMS AFTER 1200. SHOWERS LIKELY AFTER
1500.
CWR.................0 PERCENT INCREASING TO 37 PERCENT IN THE
AFTERNOON.
CHANCE OF THUNDER...49 PERCENT.
MAX TEMPERATURE.....AROUND 91.
MIN HUMIDITY........22 PERCENT.
WIND (20 FT)........EAST WINDS AROUND 5 MPH UNTIL 1000, THEN
VARIABLE UP TO 5 MPH UNTIL 1100, THEN SOUTHEAST
5 TO 8 MPH. GUSTY AND ERRATIC WINDS EXPECTED
NEAR THUNDERSTORMS AFTER 1200.
MIXING HEIGHT.......BELOW 1000 FT AGL UNTIL 0800, THEN 2200 FT AGL
UNTIL 1000, THEN 4600 FT AGL UNTIL 1100, THEN
9100 FT AGL UNTIL 1500, THEN 6400 FT AGL UNTIL
1700, THEN 3600 FT AGL.
TRANSPORT WINDS.....EAST AROUND 8 MPH UNTIL 0800, THEN 8 TO 9 MPH
UNTIL 1000, THEN LIGHT UNTIL 1100, THEN
SOUTHEAST 8 TO 13 MPH.
SMOKE DISPERSAL.....POOR UNTIL 1100, THEN FAIR UNTIL 1300, THEN
GOOD UNTIL 1600, THEN FAIR UNTIL 1700, THEN
POOR.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........30 35 19 10 9 23 61 61 61 74 82 74
WEATHER COV..... CHC CHC CHC LKY LKY LKY
WEATHER TYPE.... RW RW RW RW RW RW
TSTM COV........ CHC CHC CHC CHC CHC CHC
CWR.............0 0 0 0 0 0 30 30 30 40 40 40
CHC OF THDR (%).0 0 0 0 0 0 30 20 50 50 50 50
TEMP............60 61 67 72 81 86 89 90 87 86 85 81
RH..............57 57 50 43 31 27 23 22 24 28 29 36
20 FT WIND DIR..E E E E E SE SE SE SE SE SE E
20 FT WIND SPD..3 3 3 3 3 5 5 6 7 7 7 6
20 FT WIND GUST.9 10 8 8 8 8 10 13 14 15 15 15
MIX HGT (KFT)...0.6 0.6 1.2 2.2 4.6 8.6 8.5 9.4 7.8 6.4 5.7 3.6
TRANSP WIND DIR.E E E SE SE SE E E S SE SE E
TRANSP WIND SPD.6 5 6 7 7 8 8 10 10 12 9 12
VRATE KT-FT/1K..3 2 6 13 27 60 60 85 71 64 46 36
SMOKEDISPERSION.P P P P P G F G G G F P
FORECASTER...RPK
REQUESTED BY...NOCO DISPATCH
TYPE OF REQUEST...WILDFIRE
.TAG 2617782.0/BOU
.DELDT 07/20/26
.FORMATTERVERSION 2.0.0
.EMAIL CONCC@FIRENET.GOV
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page