002
FNUS75 KBOU 012155
FWSBOU

Spot Forecast for MBRTB Piles Old Park...USFS
National Weather Service Denver/Boulder CO
255 PM MST Mon Dec 1 2025

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

.DISCUSSION... Light snow is possible in the morning and early
afternoon with minimal snow amounts. The chance for snow increases
in the late afternoon and is likely throughout Tuesday night.
Generally 2-5" is expected for the spot location. West or
southwest winds will gust up to 20-25 mph throughout the day. This
may be able to push vent rates up to 3 kft at times but vent rates
will mostly be around 2 kft. This will keep smoke dispersal poor
although it could approach fair conditions in the afternoon.
During Tuesday night, winds will weaken with speeds decreasing to
5-10 mph. Snow will continue into Wednesday morning before coming
to an end.

.TUESDAY...

Sky/weather.........Mostly cloudy (70-80 percent). Chance of snow
                    until 1100, then snow likely.
Chance of pcpn......70 percent.
Max temperature.....Around 24.
Min humidity........71 percent.
Wind (20 ft)........Southwest winds 5 to 13 mph.
Mixing height.......Below 1000 FT AGL until 1100, then 1500 ft AGL
                    until 1500, then Below 1000 FT AGL.
Transport winds.....Southwest 10 to 16 mph.
Smoke dispersal.....Poor.

TIME (MST)      7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........64  69  70  80  84  87  88  89  89  88  90
Weather cov.....CHC CHC CHC CHC LKY LKY LKY LKY LKY LKY LKY
Weather type....SN  SN  SN  SN  SN  SN  SN  SN  SN  SN  SN
Tstm cov........
Chc of pcpn (%).30  30  30  30  60  60  60  60  60  70  70
Temp............9   13  15  18  20  22  24  22  23  21  20
RH..............96  87  88  80  77  74  71  81  81  88  92
20 FT wind dir..SW  SW  SW  SW  SW  SW  SW  SW  SW  SW  SW
20 FT wind spd..7   7   8   8   8   9   9   9   8   7   6
20 FT wind gust.12  12  13  13  13  15  15  15  13  12  15
Mix hgt (kft)...0.1 0.1 0.5 0.7 1.2 1.4 1.5 1.3 0.8 0.5 0.4
Transp wind dir.SW  SW  SW  SW  SW  W   SW  SW  W   SW  W
Transp wind spd.12  10  12  15  16  16  16  16  14  12  10
Vrate kt-ft/1K..0   0   5   9   17  20  21  18  10  5   4
SmokeDispersion.P   P   P   P   P   P   P   P   P   P   P

.TUESDAY NIGHT...

Sky/weather.........Mostly cloudy (80-90 percent). Snow likely
                    until 2300, then snow until 0500, then snow
                    likely.
Chance of pcpn......80 percent.
Min temperature.....Around 13.
Max humidity........100 percent.
Wind (20 ft)........Southwest winds 5 to 7 mph until 2200, then
                    west around 5 mph until 2400, then variable up
                    to 5 mph.
Mixing height.......Below 1000 FT AGL.
Transport winds.....West 8 to 12 mph until 0200. 8 to 10 mph after
                    0400.
Smoke dispersal.....Poor.

TIME (MST)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........90  85  91  82  86  89  89  89  89  89  89  86
Weather cov.....LKY LKY LKY LKY LKY DEF DEF DEF DEF DEF DEF LKY
Weather type....SN  SN  SN  SN  SN  SN  SN  SN  SN  SN  SN  SN
Tstm cov........
Chc of pcpn (%).70  70  70  70  70  80  80  80  80  80  80  70
Temp............20  18  17  17  16  16  16  16  16  16  15  15
RH..............92  100 100 100 100 100 100 95  96  97  94  96
20 FT wind dir..SW  SW  W   W   W   W   W   W   W   W   NW  NW
20 FT wind spd..5   5   5   5   3   3   3   2   2   2   2   2
20 FT wind gust.14  13  13  13  12  12  10  9   8   7   7   7
Mix hgt (kft)...0.3 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1
Transp wind dir.W   W   W   W   W   W   W   W   W   W   W   W
Transp wind spd.10  9   10  9   10  10  9   8   7   7   7   7
Vrate kt-ft/1K..3   0   0   0   0   0   0   0   0   0   0   0
SmokeDispersion.P   P   P   P   P   P   P   P   P   P   P   P

$$
Forecaster...Danielson
Requested by...Chris Green
Type of request...PRESCRIBED
.TAG 2526738.0/BOU
.DELDT 12/01/25
.FormatterVersion 2.0.0
.EMAIL christopher.e.green@usda.gov