562
FNUS75 KBOU 080418
FWSBOU
SPOT FORECAST FOR DIAMON FIRE...USFS
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
1018 PM MDT TUE JUL 7 2026
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
TEMPERATURES ARE CURRENTLY IN THE LOWER 60S, WITH RHS AROUND 55%
AND LIGHT WINDS. THERE ARE A FEW ISOLATED SHOWERS AROUND THE AREA
LATE THIS EVENING. RAIN CHANCES WILL REMAIN LOW (LESS THAN 20%)
OVER THE NEXT COUPLE OF HOURS, BEFORE CHANCES DECREASE FURTHER.
RAIN, IF ANY, WILL BE LIGHT THIS EVENING. RHS WILL SLOWLY
INCREASE DURING THE OVERNIGHT PERIOD, WITH THE RH PEAKING AROUND
66% AROUND SUNRISE. WINDS WILL GENERALLY REMAIN AROUND 5 TO 10MPH
OVERNIGHT ANYWHERE FROM THE SOUTHWEST TO NORTHWEST.
TOMORROW, RAIN CHANCES WILL RETURN IN THE LATE MORNING TO EARLY
AFTERNOON. THERE IS A MEDIUM CHANCE THIS ACTIVITY COULD CONTAIN
LIGHTNING IN THE AFTERNOON WITH PERIODS OF HEAVY RAINFALL. MOST
AREAS WILL LIKELY SEE A FEW HUNDREDTHS OF RAIN, BUT ISOLATED AREAS
UNDER THE HEAVIER RAINFALL COULD SEE MULTIPLE TENTHS. THE MINIMUM
RH WILL BE AROUND 31% IN THE AFTERNOON. WINDS WILL GENERALLY BE
AROUND 10MPH FROM THE WEST/NORTHWEST. BUT NEARBY THUNDERSTORMS
COULD CREATE BRIEF GUSTY WINDS AND WIND SHIFTS. RAIN IS EXPECTED
TO MOVE OUT OF THE AREA IN THE LATE EVENING, LEAVING LIGHT WINDS
AND HIGHER RHS FOR THE OVERNIGHT PERIOD.
RAIN AND THUNDERSTORM CHANCES WILL RETURN AGAIN FOR THURSDAY
AFTERNOON AND THURSDAY EVENING. LIGHTNING AND GUSTY WINDS WILL BE
POSSIBLE WITH THIS ACTIVITY. MINIMUM RHS WILL BE AROUND 32% WITH
GENERALLY LIGHT WINDS OUTSIDE OF THUNDERSTORMS.
REST OF TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (50-60 PERCENT) UNTIL 0200, THEN
PARTLY CLOUDY (25-35 PERCENT). CHANCE OF RAIN
SHOWERS UNTIL 2400, THEN SLIGHT CHANCE OF RAIN
SHOWERS UNTIL 0100.
CWR.................10 PERCENT DECREASING TO 1 PERCENT OVERNIGHT.
CHANCE OF THUNDER...8 PERCENT.
MIN TEMPERATURE.....AROUND 53.
MAX HUMIDITY........66 PERCENT.
WIND (20 FT)........WEST WINDS 5 TO 12 MPH.
MIXING HEIGHT.......BELOW 1000 FT AGL.
TRANSPORT WINDS.....SOUTHWEST AROUND 10 MPH UNTIL 2300, THEN WEST
11 TO 16 MPH.
SMOKE DISPERSAL.....POOR.
TIME (MDT) 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........59 59 56 54 37 32 29 22
WEATHER COV.....CHC CHC SCH
WEATHER TYPE....RW RW RW
TSTM COV........
CWR.............10 10 10 0 0 0 0 0
CHC OF THDR (%).10 10 0 0 0 0 0 0
TEMP............62 61 60 59 59 58 58 57
RH..............58 60 62 62 60 60 57 59
20 FT WIND DIR..W W W W W W W W
20 FT WIND SPD..6 7 7 6 6 7 7 8
20 FT WIND GUST.9 12 12 9 9 12 12 13
MIX HGT (KFT)...0.6 0.6 0.5 0.6 0.6 0.6 0.6 0.5
TRANSP WIND DIR.SW W W W W W W W
TRANSP WIND SPD.10 12 14 13 13 13 13 13
VRATE KT-FT/1K..5 6 6 6 6 6 6 6
SMOKEDISPERSION.P P P P P P P P
WEDNESDAY
SKY/WEATHER.........MOSTLY SUNNY (15-25 PERCENT) UNTIL 1100, THEN
PARTLY CLOUDY (30-40 PERCENT) UNTIL 1200, THEN
MOSTLY CLOUDY (65-75 PERCENT). CHANCE OF RAIN
SHOWERS AND THUNDERSTORMS AFTER 1200.
CWR.................2 PERCENT INCREASING TO 17 PERCENT IN THE
AFTERNOON.
CHANCE OF THUNDER...44 PERCENT.
MAX TEMPERATURE.....AROUND 79.
MIN HUMIDITY........31 PERCENT.
WIND (20 FT)........WEST WINDS 6 TO 11 MPH UNTIL 1200, THEN
NORTHWEST UNTIL 1500, THEN NORTHWEST 6 TO 11
MPH UNTIL 1700, THEN SOUTH AROUND 7 MPH. GUSTY
AND ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS
AFTER 1200.
MIXING HEIGHT.......BELOW 1000 FT AGL UNTIL 0800, THEN 2000 FT AGL
UNTIL 0900, THEN 5200 FT AGL UNTIL 1000, THEN
9800 FT AGL UNTIL 1400, THEN 7000 FT AGL UNTIL
1700, THEN 4300 FT AGL.
TRANSPORT WINDS.....WEST 13 TO 20 MPH UNTIL 1400, THEN NORTHWEST
AROUND 14 MPH UNTIL 1500, THEN 12 TO 17 MPH
UNTIL 1700, THEN SOUTHWEST.
SMOKE DISPERSAL.....POOR UNTIL 0900, THEN GOOD UNTIL 1000, THEN
VERY GOOD UNTIL 1100, THEN EXCELLENT UNTIL
1300, THEN VERY GOOD UNTIL 1400, THEN GOOD
UNTIL 1700, THEN FAIR.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........19 21 16 13 22 37 73 72 65 67 67 69
WEATHER COV..... CHC CHC CHC CHC CHC CHC
WEATHER TYPE.... RW RW RW RW RW RW
TSTM COV........ CHC CHC CHC CHC CHC CHC
CWR.............0 0 0 0 0 0 20 20 20 20 20 20
CHC OF THDR (%).0 0 0 0 10 10 40 40 40 40 40 40
TEMP............54 59 64 68 72 74 76 74 74 76 73 73
RH..............66 60 50 44 38 34 31 34 35 34 38 38
20 FT WIND DIR..W W W W W W NW NW W NW NW S
20 FT WIND SPD..8 8 9 9 9 9 9 8 8 9 8 7
20 FT WIND GUST.13 13 15 15 15 15 15 13 13 15 13 12
MIX HGT (KFT)...0.6 0.6 2.0 5.2 8.2 10 11 8.2 6.3 7.8 5.4 4.3
TRANSP WIND DIR.W W W W W W W W NW W NW SW
TRANSP WIND SPD.14 13 15 17 18 20 17 20 14 14 14 12
VRATE KT-FT/1K..7 7 26 78 131 178 164 140 76 93 65 43
SMOKEDISPERSION.P P P G VG E E VG G G G F
WEDNESDAY NIGHT
SKY/WEATHER.........MOSTLY CLOUDY (50-60 PERCENT) UNTIL 2200, THEN
PARTLY CLOUDY (40-50 PERCENT) UNTIL 2300, THEN
MOSTLY CLOUDY (45-55 PERCENT) UNTIL 2400, THEN
PARTLY CLOUDY (40-50 PERCENT) UNTIL 0100, THEN
MOSTLY CLOUDY (60-70 PERCENT). CHANCE OF RAIN
SHOWERS AND THUNDERSTORMS UNTIL 2100, THEN
SLIGHT CHANCE OF RAIN SHOWERS UNTIL 2200.
CWR.................7 PERCENT.
CHANCE OF THUNDER...30 PERCENT.
MIN TEMPERATURE.....AROUND 50.
MAX HUMIDITY........77 PERCENT.
WIND (20 FT)........WEST WINDS 5 TO 8 MPH UNTIL 2000, THEN
SOUTHEAST UNTIL 2400, THEN SOUTH 5 TO 7 MPH
UNTIL 0200, THEN SOUTHWEST UNTIL 0400, THEN
WEST. GUSTY AND ERRATIC WINDS EXPECTED NEAR
THUNDERSTORMS UNTIL 2100.
MIXING HEIGHT.......4300 FT AGL UNTIL 1900. BELOW 1000 FT AGL AFTER
2000.
TRANSPORT WINDS.....SOUTH 10 TO 15 MPH UNTIL 2100, THEN 9 TO 14 MPH
UNTIL 0300, THEN SOUTHWEST.
SMOKE DISPERSAL.....FAIR UNTIL 1900, THEN POOR.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........63 61 51 53 46 51 47 52 53 75 68 56
WEATHER COV.....CHC CHC CHC SCH
WEATHER TYPE....RW RW RW RW
TSTM COV........CHC CHC CHC
CWR.............0 10 10 10 10 0 0 0 0 0 0 0
CHC OF THDR (%).30 30 30 10 10 10 0 0 0 0 0 0
TEMP............71 68 66 61 59 58 57 56 56 54 55 54
RH..............41 47 54 65 72 75 75 74 74 77 69 71
20 FT WIND DIR..W W SE SE SE SE S S SW SW SW W
20 FT WIND SPD..7 6 6 7 6 5 5 5 5 5 5 5
20 FT WIND GUST.14 10 9 10 8 7 8 7 7 7 7 7
MIX HGT (KFT)...4.3 2.5 0.8 0.8 0.8 0.8 0.5 0.6 0.6 0.6 0.6 0.6
TRANSP WIND DIR.SW S S SE S S S S S S SW SW
TRANSP WIND SPD.14 14 10 9 9 12 13 13 13 12 12 10
VRATE KT-FT/1K..52 30 7 7 6 8 6 6 6 6 6 5
SMOKEDISPERSION.F P P P P P P P P P P P
THURSDAY
SKY/WEATHER.........PARTLY CLOUDY (25-35 PERCENT) UNTIL 0900, THEN
MOSTLY SUNNY (20-30 PERCENT) UNTIL 1000, THEN
PARTLY CLOUDY (40-50 PERCENT) UNTIL 1100, THEN
MOSTLY CLOUDY (65-75 PERCENT). SLIGHT CHANCE OF
RAIN SHOWERS UNTIL 1200, THEN RAIN SHOWERS
LIKELY AND CHANCE OF THUNDERSTORMS.
CWR.................4 PERCENT.
CHANCE OF THUNDER...39 PERCENT.
MAX TEMPERATURE.....AROUND 77.
MIN HUMIDITY........32 PERCENT.
WIND (20 FT)........WEST WINDS 5 TO 8 MPH UNTIL 1000, THEN
NORTHWEST 6 TO 11 MPH. GUSTY AND ERRATIC WINDS
EXPECTED NEAR THUNDERSTORMS AFTER 1200.
MIXING HEIGHT.......BELOW 1000 FT AGL UNTIL 0800. 8400 FT AGL AFTER
1100.
TRANSPORT WINDS.....WEST 12 TO 21 MPH.
SMOKE DISPERSAL.....POOR UNTIL 0900, 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 (%).........32 33 29 25 43 60 78 78 78 78 78 78
WEATHER COV.....SCH SCH SCH SCH SCH SCH LKY LKY LKY LKY LKY LKY
WEATHER TYPE....RW RW RW RW RW RW RW RW RW RW RW RW
TSTM COV........ CHC CHC CHC CHC CHC CHC
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
CHC OF THDR (%).0 0 0 10 10 10 40 40 40 40 40 40
TEMP............52 56 60 64 67 70 72 74 75 75 74 73
RH..............77 69 60 52 45 39 35 33 32 32 33 34
20 FT WIND DIR..W W W W W NW NW NW W W W W
20 FT WIND SPD..5 5 6 7 8 8 8 8 8 8 8 8
20 FT WIND GUST.7 8 10 14 16 17 17 17 17 17 17 16
MIX HGT (KFT)...0.6 0.7 2.6 4.5 5.5 6.4 7.4 8.0 8.5 9.1 8.1 7.1
TRANSP WIND DIR.W W W W W W W W W W W W
TRANSP WIND SPD.12 12 14 16 16 16 16 17 20 21 18 17
VRATE KT-FT/1K..6 7 32 64 77 90 103 119 145 164 130 106
SMOKEDISPERSION.P P P G G G VG VG VG E VG VG
FORECASTER...PETTETT
REQUESTED BY...JS
TYPE OF REQUEST...WILDFIRE
.TAG 2616964.0/BOU
.DELDT 07/07/26
.FORMATTERVERSION 2.0.0
.EMAIL CONCC@FIRENET.GOV
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