041
FNUS75 KTFX 270021
FWSTFX

Spot Forecast for Dalton 39A...USFS
National Weather Service Great Falls MT
621 PM MDT Thu Sep 26 2024

Forecast is based on ignition time of 1800 MDT on September 26.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...

Broad upper level high pressure builds over the interior western
US through the upcoming weekend for continued dry conditions with
temperatures warming back to above seasonal averages. Afternoon
humidity will fall to around 20% Friday and Saturday with moderate
overnight humidity recovery. A west to southwest flow aloft
prevails over the Northern Rockies with winds overnight tonight
and again Friday night becoming light and mainly down-
slope/drainage outside of exposed ridgetops areas. Afternoon winds
will become breezy from the west Friday afternoon with somewhat
lighter south to southwest winds expected Saturday afternoon.

.TONIGHT...

Sky/weather.........Mostly clear (5-15 percent).
CWR.................0 percent.
LAL.................1.
Min temperature.....40-45.
Max humidity........50-55 percent.
Wind (20 ft)........
 Slope/valley.......West winds 5 to 10 mph, but becoming light
                    down-slope in more sheltered lower
                    slope/drainage locations.
Mixing height.......0 ft AGL.
Transport winds.....Southwest around 10 mph.

.FRIDAY...

Sky/weather.........Sunny (5-15 percent).
CWR.................0 percent.
LAL.................1.
Max temperature.....66-71.
Min humidity........22-27 percent.
Wind (20 ft)........
 Slope/valley.......South winds up to 5 mph in the morning...becoming
                    west 10 to 15 mph with gusts up to 25 mph in
                    the afternoon.
Mixing height.......4500 ft AGL.
Transport winds.....West around 15 mph.
Haines Index........2 or very low potential for large plume
                    dominated fire growth.

.FRIDAY NIGHT...

Sky/weather.........Mostly clear (0-10 percent).
CWR.................0 percent.
LAL.................1.
Min temperature.....43-48.
Max humidity........55-60 percent.
Wind (20 ft)........
 Slope/valley.......West winds up to 10 mph...becoming light
                    down-slope in more sheltered lower
                    slope/drainage locations.
Mixing height.......0 ft AGL.
Transport winds.....West around 5 mph.

.SATURDAY...

Sky/weather.........Sunny (0-10 percent).
CWR.................0 percent.
LAL.................1.
Max temperature.....73-78.
Min humidity........18-23 percent.
Wind (20 ft)........
 Slope/valley.......Light and variable winds in the
                    morning...becoming south 5 to 10 mph
                    with gusts to 15 mph in the afternoon.
Mixing height.......6000 ft AGL.
Transport winds.....South around 10 mph.

$$
Forecaster...Hoenisch
Requested by...Nick Boucher
Type of request...PRESCRIBED
.TAG 2422964.3/TFX
.DELDT 09/26/24
.FormatterVersion 2.0.0
.EMAIL jason.l.gilbert@usda.gov,nicholas.boucher@usda.gov,donald.iles@usda.gov,jarel.kurtz@usda.gov, tfx.ops@noaa.gov