834
FNUS75 KBOU 181240
FWSBOU

Spot Forecast for Front Country Rx...NPS
National Weather Service Denver/Boulder CO
540 AM MST Tue Nov 18 2025

If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...Generally quiet and dry conditions are forecast over
the next two days. Southwest winds this morning will weaken and
shift more to the south by the early afternoon hours. Temperatures
should reach 50F today with minimum humidity values near 30-35
percent. Relative humidity should recover back into the 65-75
percent range tonight with lows near 30F. Wednesday will see
similar temperatures with slightly higher RH during the day. Winds
are expected to remain out of the west or southwest with a
weakening trend during the day. Fair to good smoke dispersal is
forecast during most of the day.

.TODAY...

Sky/weather.........Mostly cloudy (45-55 percent).
CWR.................2 percent.
Chance of pcpn......10 percent.
Chance of thunder...0 percent.
Max temperature.....Around 50.
Min humidity........33 percent.
Wind (20 ft)........West winds 6 to 11 mph until 1000, then south 5
                    to 7 mph until 1600, then variable up to 5 mph.
Mixing height.......3700 ft AGL until 1100, then 6600 ft AGL until
                    1600, then 3800 ft AGL.
Transport winds.....West 9 to 14 mph until 1100, then southwest
                    until 1700, then light.
Smoke dispersal.....Poor until 1100, then fair until 1200, then
                    good until 1500, then fair until 1600, then
                    poor.

TIME (MST)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........52  49  46  47  48  47  49  49  48  50  49  53
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............31  32  35  42  46  48  49  50  49  48  46  40
RH..............63  60  57  45  38  35  34  33  36  36  38  49
20 FT wind dir..W   W   W   SW  SW  S   S   SE  S   S   S   SW
20 FT wind spd..7   8   8   7   5   5   5   6   6   5   3   3
20 FT wind gust.11  12  13  12  7   7   7   9   9   7   6   6
Mix hgt (kft)...2.3 2.3 2.2 3.0 4.2 5.6 6.5 6.6 6.5 5.9 4.1 2.5
Transp wind dir.W   W   W   W   SW  S   SW  S   SW  SW  S   S
Transp wind spd.13  12  12  9   9   9   13  12  13  12  9   6
Vrate kt-ft/1K..26  23  22  24  34  45  71  66  72  59  33  12
SmokeDispersion.P   P   P   P   P   F   G   G   G   F   P   P

.TONIGHT...

Sky/weather.........Mostly cloudy (55-65 percent) until 2300, then
                    partly cloudy (35-45 percent).
CWR.................2 percent.
Chance of pcpn......10 percent.
Chance of thunder...0 percent.
Min temperature.....Around 29.
Max humidity........72 percent.
Wind (20 ft)........Variable up to 5 mph until 2100, then west 5 to
                    8 mph.
Mixing height.......2300 ft AGL.
Transport winds.....Southwest 8 to 10 mph until 2100. West 18 to 23
                    mph after 0300.
Smoke dispersal.....Poor until 0200, then fair.

TIME (MST)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........59  58  55  64  55  47  43  32  31  30  36  50
Weather cov.....
Weather type....
Tstm cov........
CWR.............0   0   0   0   0   0   0   0   0   0   0   0
Chc of pcpn (%).10  10  10  10  10  0   0   0   0   0   0   0
Chc of thdr (%).0   0   0   0   0   0   0   0   0   0   0   0
Temp............38  36  35  35  34  33  33  32  33  32  33  32
RH..............51  54  56  56  58  63  63  68  67  69  70  69
20 FT wind dir..SW  W   W   W   W   W   W   W   W   W   W   W
20 FT wind spd..2   3   3   5   5   5   6   7   7   8   8   8
20 FT wind gust.3   6   6   7   7   7   9   12  12  13  13  13
Mix hgt (kft)...2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.4 2.5 2.4 2.4 2.4
Transp wind dir.SW  SW  W   W   W   W   W   W   W   W   W   W
Transp wind spd.6   7   8   9   12  13  14  16  18  20  21  21
Vrate kt-ft/1K..11  14  16  19  23  26  28  33  40  41  42  42
SmokeDispersion.P   P   P   P   P   P   P   P   F   F   F   F

.WEDNESDAY...

Sky/weather.........Mostly cloudy (55-65 percent) until 1700, then
                    partly cloudy (45-55 percent).
CWR.................3 percent.
Chance of pcpn......10 percent.
Chance of thunder...0 percent.
Max temperature.....Around 51.
Min humidity........36 percent.
Wind (20 ft)........West winds 5 to 8 mph until 1600, then
                    southwest around 5 mph.
Mixing height.......5100 ft AGL until 1700, then 2100 ft AGL.
Transport winds.....West 14 to 21 mph until 1600. Light after 1700.
Smoke dispersal.....Poor until 0900, then good until 1500, then
                    fair until 1600, then poor.

TIME (MST)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........56  57  60  63  60  55  56  56  57  55  52  50
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   0
Temp............31  34  36  43  46  48  49  50  51  49  47  44
RH..............72  65  63  49  45  41  41  38  36  38  40  45
20 FT wind dir..W   W   W   W   W   W   W   SW  SW  SW  SW  W
20 FT wind spd..8   7   7   7   7   7   7   6   6   5   3   3
20 FT wind gust.13  12  12  12  12  12  12  9   9   7   6   6
Mix hgt (kft)...2.3 2.4 2.9 3.8 4.6 5.5 5.8 5.9 6.0 4.7 3.4 2.1
Transp wind dir.W   W   W   W   W   W   W   W   W   W   W   W
Transp wind spd.17  14  14  21  20  18  17  17  17  14  10  7
Vrate kt-ft/1K..35  28  35  69  78  89  88  89  89  56  31  13
SmokeDispersion.P   P   P   G   G   G   G   G   G   F   P   P

$$
Forecaster...Hiris
Requested by...Aaron Klee
Type of request...PRESCRIBED
.TAG 2526184.0/BOU
.DELDT 11/18/25
.FormatterVersion 2.0.0
.EMAIL Aaron_Klee@nps.gov,Nathan_Hallam@nps.gov