Spot Forecast
Issued by NWS Denver/Boulder, CO
Issued by NWS Denver/Boulder, CO
623
FNUS75 KBOU 171817
FWSBOU
Spot Forecast for Logan Fire...USFS
National Weather Service Denver/Boulder CO
1217 PM MDT Sun Aug 17 2025
If conditions become unrepresentative...contact the National Weather
Service.
.DISCUSSION...Partly to mostly cloudy skies are expected this
afternoon, with a slight (20%) chance of a brief shower or
thunderstorm after 3 PM. Winds should generally remain out of the
south to southwest, with a few gusts up to around 15 mph possible.
Light winds are forecast overnight, with an eventual shift to the
north to northwest. Tomorrow will see a modest increase in
precipitation chances (30-40%), but wetting rain chances will
remain low. Winds should shift from the northwest to the southeast
through the day. Temperatures will again reach the upper 60s to
low 70s with minimum relative humidity near 20%.
.REST OF TODAY...
Sky/weather.........Mostly cloudy (55-65 percent). Slight chance of
showers and thunderstorms after 1500.
CWR.................5 percent.
Chance of thunder...19 percent.
Max temperature.....Around 70.
Min humidity........23 percent.
Wind (20 ft)........South winds 5 to 8 mph until 1600, then 5 to 7
mph. Gusty and erratic winds expected near
thunderstorms after 1500.
Mixing height.......9800 ft AGL.
Transport winds.....West 9 to 14 mph.
Smoke dispersal.....Very good until 1400, then good.
TIME (MDT) 1PM 2PM 3PM 4PM 5PM
Sky (%).........59 59 65 65 65
Weather cov..... SCH SCH SCH
Weather type.... RW RW RW
Tstm cov........ SCH SCH SCH
CWR.............0 0 5 5 5
Chc of thdr (%).10 10 10 20 20
Temp............68 68 69 68 70
RH..............27 24 23 23 23
20 FT wind dir..SW S S S S
20 FT wind spd..6 6 6 6 5
20 FT wind gust.9 9 9 9 7
Mix hgt (kft)...9.7 9.9 9.8 9.3 8.7
Transp wind dir.W W W W W
Transp wind spd.13 12 12 9 10
Vrate kt-ft/1K..107 99 98 74 79
SmokeDispersion.VG G G G G
.TONIGHT...
Sky/weather.........Mostly cloudy (50-60 percent) until 2100, then
partly cloudy (25-35 percent). Slight chance of
rain showers until 2100.
CWR.................7 percent.
Chance of thunder...19 percent.
Min temperature.....Around 51.
Max humidity........50 percent.
Wind (20 ft)........West winds around 5 mph until 1900, then variable
around 5 mph until 2200, then northwest.
Mixing height.......6500 ft AGL until 1900. Below 1000 FT AGL after
2000.
Transport winds.....West around 8 mph until 1900, then light until
2000, then east around 8 mph until 2200, then
light until 2300, then west 8 to 11 mph.
Smoke dispersal.....Fair until 1900, then poor.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........58 51 54 44 35 40 44 35 25 16 13 11
Weather cov.....SCH SCH SCH
Weather type....RW RW RW
Tstm cov........
CWR.............10 10 10 0 0 0 0 0 0 0 0 0
Chc of thdr (%).10 10 10 0 0 0 0 0 0 0 0 0
Temp............68 67 63 58 57 56 55 55 54 54 52 52
RH..............25 28 34 42 43 45 47 47 48 48 50 50
20 FT wind dir..W E E E W NW NW NW NW NW NW NW
20 FT wind spd..5 5 5 6 6 7 7 7 7 8 9 9
20 FT wind gust.7 7 7 9 9 12 12 12 12 13 15 15
Mix hgt (kft)...6.5 3.5 0.6 0.3 0.4 0.4 0.5 0.5 0.5 0.5 0.5 0.5
Transp wind dir.W SW E E E W W W W W W W
Transp wind spd.8 5 5 6 6 7 7 8 8 8 9 9
Vrate kt-ft/1K..45 14 2 1 2 2 2 4 4 3 4 4
SmokeDispersion.F P P P P P P P P P P P
.MONDAY...
Sky/weather.........Mostly sunny (0-10 percent) until 1100, then
partly cloudy (30-40 percent) until 1200, then
mostly cloudy (55-65 percent). Chance of rain
showers and thunderstorms after 1200.
CWR.................2 percent increasing to 12 percent in the
afternoon.
Chance of thunder...40 percent.
Max temperature.....Around 71.
Min humidity........21 percent.
Wind (20 ft)........Northwest winds 6 to 11 mph until 0900. East 5
to 8 mph after 1400. Gusty and erratic winds
expected near thunderstorms after 1200.
Mixing height.......Below 1000 FT AGL until 0900, then 2900 ft AGL
until 1000, then 7600 ft AGL until 1200, then
8400 ft AGL until 1600, then 5700 ft AGL.
Transport winds.....Northwest 8 to 11 mph until 0800, then light
until 0900, then southwest 8 to 10 mph until
1400, then southeast 8 to 11 mph until 1700,
then light.
Smoke dispersal.....Poor until 1100, then fair until 1200, then
good until 1500, then fair until 1600, then
poor.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........4 12 4 2 5 33 60 60 60 60 60 60
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 10 10 10 10 10 10
Chc of thdr (%).0 0 0 10 10 10 40 40 40 40 40 40
Temp............52 51 55 59 64 67 68 69 70 70 69 68
RH..............46 48 43 37 29 24 22 21 22 22 24 27
20 FT wind dir..NW NW W W W S S SE E E E E
20 FT wind spd..9 8 7 6 6 6 6 6 7 7 7 6
20 FT wind gust.15 13 12 12 12 12 13 14 15 16 16 15
Mix hgt (kft)...0.5 0.5 0.6 2.9 6.3 7.9 9.4 8.5 7.6 6.7 5.7 4.7
Transp wind dir.NW NW NW SW SW SW SW S S SE SE E
Transp wind spd.9 8 7 6 7 8 9 9 9 9 8 7
Vrate kt-ft/1K..4 4 3 12 38 55 75 68 61 53 40 28
SmokeDispersion.P P P P P F G G G F P P
$$
Forecaster...Hiris
Requested by...Pautz
Type of request...WILDFIRE
.TAG 2520085.0/BOU
.DELDT 08/17/25
.FormatterVersion 2.0.0
.EMAIL lukas.pautz@usda.gov