Spot Forecast
Issued by NWS Great Falls, MT

000
FNUS75 KTFX 221908
FWSTFX

Spot Forecast for poorman...USFS
National Weather Service Great Falls MT
108 PM MDT Mon Apr 22 2024

Forecast is based on ignition time of 0000 MDT on April 23.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...

High pressure at the surface and aloft gradually shifts east
across the Northern Rockies through Wednesday for a warming trend
with just some scattered cloud-cover at times. West winds will
diminish this evening with light terrain-driven winds developing
in drainages where it is likely to continue through Tuesday night.
At ridgetops, west winds diminish tonight and become east to
southeasterly on Tuesday. Wednesday is likely to be the warmest day
with a more persistent general west to southwest wind across the
area.

.TONIGHT...

Sky/weather.........Mostly clear (5-15 percent).
CWR.................0 percent.
LAL.................1.
Min temperature.....25-30.
Max humidity........56-61 percent.
Wind (20 ft)........
 Slope/valley.......West winds 5-10 mph in the evening, becoming
                    down-drainage 3-7 mph by midnight.
Mixing height.......500 ft AGL.
Transport winds.....West up to 10 mph in the evening, turning to
                    east early Tuesday morning.

.TUESDAY...

Sky/weather.........Mostly sunny (25-35 percent).
CWR.................0 percent.
LAL.................1.
Max temperature.....51-56.
Min humidity........21-26 percent.
Wind (20 ft)........
 Slope/valley.......Becoming up-slope/up-valley 3 to 7 mph in the
                    afternoon. South winds to 10 mph on ridgetops.
Mixing height.......6500 ft AGL.
Transport winds.....Southeast around 10 mph.
Haines Index........2 or very low potential for large plume
                    dominated fire growth.

.TUESDAY NIGHT...

Sky/weather.........Partly cloudy (40-50 percent).
CWR.................0 percent.
LAL.................1.
Min temperature.....32-37.
Max humidity........49-54 percent.
Wind (20 ft)........
 Slope/valley.......Becoming down-drainage 3-7 mph in the evening.
                    Southwest winds around 10 mph on ridgetops,
                    increasing to 10-15 mph by Wednesday morning.
Mixing height.......0 ft AGL.
Transport winds.....Southwest around 10 mph.

.WEDNESDAY...

Sky/weather.........Mostly sunny (35-45 percent).
CWR.................5 percent.
LAL.................1.
Max temperature.....57-62.
Min humidity........24-29 percent.
Wind (20 ft)........
 Slope/valley.......West winds 6 to 12 mph with afternoon gusts to
                    18 mph. West 10-15 mph on ridgetops with
                    afternoon gusts to 20 mph.
Mixing height.......8000 ft AGL.
Transport winds.....West around 20 mph.
Haines Index........3 or very low potential for large plume
                    dominated fire growth.

$$
Forecaster...Hoenisch
Requested by...Jesse Riddle
Type of request...PRESCRIBED
.TAG 2411774.0/TFX
.DELDT 04/22/24
.FormatterVersion 2.0.0
.EMAIL jesse.riddle@usda.gov