742
FNUS75 KTFX 301145
FWSTFX

Spot Forecast for Two Calf RX...BLM
National Weather Service Great Falls MT
545 AM MDT Thu May 30 2024

Forecast is based on ignition time of 0700 MDT on May 30.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...
A disturbance in the moderate northwesterly flow aloft will bring
gusty westerly surface winds by afternoon, along with a chance of
light showers and possibly a thunderstorm. The main threat from
these storms will be erratic wind gusts up to 45 mph. The probability
for 0.10 inches or more of precipitation from the showers is 10
percent or less. Weak high pressure aloft will then start to move
into the area tonight into Friday, for decreasing clouds and wind.
Although temperatures today will be below seasonal averages, afternoon
humidity will likely fall below 30 percent, and slight warming
on Friday will likely lower afternoon humidity to near 20 percent.

.REST OF TODAY...

Sky/weather.........Mostly sunny (30-40 percent). Chance of showers
                    in the afternoon with a slight chance of
                    thunderstorms.
CWR.................10 percent.
LAL.................1 until 1200, then 2.
Max temperature.....61-66.
Min humidity........23-28 percent.
Wind (20 ft)........
 Slope/valley.......Breezy. West winds 20 to 25 mph. Gusts to 35 mph
                    possible in the afternoon. Erratic wind gusts to
                    45 mph possible near thunderstorms in the
                    afternoon.
Mixing height.......11500 ft AGL.
Transport winds.....West around 30 mph.
Haines Index........6 or high potential for large plume dominated
                    fire growth.

.TONIGHT...

Sky/weather.........Mostly clear (20-30 percent).
CWR.................0 percent.
LAL.................1.
Min temperature.....41-46.
Max humidity........51-56 percent.
Wind (20 ft)........
 Slope/valley.......West winds 10 to 20 mph. Gusts to 30 mph in the
                    evening.
Mixing height.......500 ft AGL.
Transport winds.....West around 20 mph.
Haines Index........

.FRIDAY...

Sky/weather.........Sunny (10-20 percent).
CWR.................0 percent.
LAL.................1.
Max temperature.....65-70.
Min humidity........18-23 percent.
Wind (20 ft)........
 Slope/valley.......West winds 10 to 15 mph. Gusts to 25 mph in the
                    afternoon.
Mixing height.......10000 ft AGL increasing to 11000 ft AGL late in
                    the afternoon.
Transport winds.....West around 20 mph.
Haines Index........6 or high potential for large plume dominated
                    fire growth.

$$
Forecaster...Coulston
Requested by...Jay Peterman
Type of request...PRESCRIBED
.TAG 2415143.2/TFX
.DELDT 05/30/24
.FormatterVersion 2.0.0
.EMAIL jpeterman@blm.gov, tfx.ops@noaa.gov