361
FNUS75 KBYZ 051232
FWSBYZ

Spot Forecast for Hyalite Rx...USFS
National Weather Service Billings MT
632 AM MDT Sat Oct 5 2024

Forecast is based on ignition time of 0600 MDT on October 05.
If conditions become unrepresentative...contact the National Weather
Service.

Please contact our office if you have questions
or concerns with this forecast.

...RED FLAG WARNING IN EFFECT UNTIL 6 PM MDT THIS EVENING...

.DISCUSSION...

West to northwest winds will prevail today as relative humidities
drop into the upper teens to lower 20s. A gust around 20 mph is
possible during the day at the burn site. Westerly ridgetop winds
around 35 mph this morning will decrease to around 20 mph around
noon. Light terrain driven winds will develop tonight under
relatively poor relative humidity recoveries. Sunday will be
mostly sunny with light westerly winds developing during the day.
Minimum relative humidities will be similar to today in the upper
teens to lower 20s.

.TODAY...

Sky/weather.........Mostly sunny.
CWR.................0 percent.
LAL.................1...no thunderstorms.
Max temperature.....54-58.
Min humidity........19-23 percent.
Wind (20 ft)........
 Slope/valley.......West becoming northwest by noon 9 to 14 mph
                    with gusts to around 20 mph.
 Ridgetop...........West around 35 mph early decreasing to 20 mph
                    around noon.
Mixing height.......Increasing to 4500 ft AGL.
Transport winds.....West around 20 mph.
Haines index........3.

.TONIGHT...

Sky/weather.........Partly cloudy.
CWR.................0 percent.
LAL.................1...no thunderstorms.
Min temperature.....37-41.
Max humidity........40-44 percent.
Wind (20 ft)........
 Slope/valley.......Downslope/downvalley 4 to 7 mph.
 Ridgetop...........West around 15 mph.
Mixing height.......Decreasing to 400 ft AGL.
Transport winds.....West around 15 mph.

.SUNDAY...

Sky/weather.........Mostly sunny.
CWR.................0 percent.
LAL.................1...no thunderstorms.
Max temperature.....63-67.
Min humidity........19-23 percent.
Wind (20 ft)........
 Slope/valley.......Downslope/downvalley 4 to 7 mph early becoming
                    west 7 to 11 mph the afternoon.
 Ridgetop...........West around 15 mph.
Mixing height.......Increasing to 6000 ft AGL.
Transport winds.....West around 15 mph.
Haines index........3.

$$
Forecaster...Arends/Setzenfand
Requested by...James Ray
Type of request...PRESCRIBED
.TAG 2423362.2/BYZ
.DELDT 10/05/24
.FormatterVersion 2.0.0
.EMAIL James.M.Ray@usda.gov,liam.t.dillaway@usda.gov