867
FNUS75 KBYZ 170402
FWSBYZ

Spot Forecast for Jack...DNRC
National Weather Service Billings MT
1002 PM MDT Fri Aug 16 2024

Forecast is based on forecast start time of 2200 MDT on August 16.
If conditions become unrepresentative...contact the National Weather
Service.

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

.DISCUSSION...

A thunderstorm outflow gust front is expected in the fire area
around 1040pm this evening, with westerly winds gusting up to 30
mph. Thunderstorms will likely stay to the north of the fire area
but can`t rule out one developing along this boundary.

Threat for thunderstorms ends around midnight. Watch for those
westerly winds to shift northerly as any storms pass north of the
area. Overnight skies clear with winds becoming light
northwesterly. Saturday will be sunny and dry with temperatures in
the low 90s and RH values in the lower 20s and light winds
turning easterly in the afternoon. Occasional thermal gusts to 20
mph in the heat of the day. Light winds and clear dry conditions
for Saturday night. Chambers

.REST OF TONIGHT...

Sky/weather.........Mostly clear. Isolated shower or thunderstorm
                    until midnight.
CWR.................5 percent.
LAL.................2...1 to 8 strikes/15 min/cell.
Min temperature.....55-59.
Max humidity........68-72 percent.
Wind (20 ft)........
 Slope/valley.......Southeast winds around 10 mph shifting to the
                    northwest 4 to 8 mph overnight. Gusty and erratic
                    winds expected near thunderstorms.
 Ridgetop...........Southwest around 10 mph.
Mixing height.......400 ft AGL.
Transport winds.....Southeast around 9 mph.

.SATURDAY...

Sky/weather.........Sunny.
CWR.................0 percent.
LAL.................1...no thunderstorms.
Max temperature.....87-91.
Min humidity........20-25 percent.
Wind (20 ft)........
 Slope/valley.......West winds 3 to 6 mph shifting to the northeast
                    4 to 8 mph in the afternoon. Occasional thermal
                    gusts to 20 mph in the afternoon.
 Ridgetop...........West around 7 mph shifting to the east in the
                    afternoon.
Mixing height.......7100 ft AGL in the afternoon.
Transport winds.....West around 8 mph.
Haines index........4.

.SATURDAY NIGHT...

Sky/weather.........Partly cloudy.
CWR.................0 percent.
LAL.................1...no thunderstorms.
Min temperature.....60-64.
Max humidity........54-58 percent.
Wind (20 ft)........
 Slope/valley.......East winds 4 to 8 mph.
 Ridgetop...........East around 8 mph.
Mixing height.......300 ft AGL.
Transport winds.....Southeast around 11 mph.

$$
Forecaster...Chambers
Requested by...Jeff Brown
Type of request...WILDFIRE
.TAG 2420423.0/BYZ
.DELDT 08/16/24
.FormatterVersion 2.0.0
.EMAIL mtbdc@firenet.gov