865
FNUS75 KPIH 211000
FWSPIH

Spot Forecast for Wino Basin Prescribed Burn...USFS
National Weather Service Pocatello ID
400 AM MDT Tue May 21 2024

Forecast is based on ignition time of 0700 MDT on May 21.
If conditions become unrepresentative, contact the National Weather
Service.

Please contact our office at (208) 232-9357, if you have questions
or concerns with this forecast.

.DISCUSSION...
Seasonably cool and dry weather will continue in the Pahsimeroi
Mountains today outside of a slight chance of showers this
afternoon and evening. Those chances will steadily increase
throughout the day Wednesday as a cold front brings widespread
precipitation to central Idaho. The bulk of this moisture will
fall Wednesday afternoon through Thursday morning with a storm
total liquid amount of around 0.25-0.5" with around a T-2" of snow
below 7000 feet and 2-5" above 7000 feet with locally higher
totals on summits and ridgelines. As this storm departs later in
the day Thursday into Friday, a secondary more quick moving system
will arrive for Saturday into early Sunday with another round of
showers and storms. To round out Memorial Day Weekend, a high
pressure ridge will begin to build in overhead which will support
warmer and drier conditions to return for much of next week. This
will likely be the warmest airmass we have seen so far this year
with highs in the 60s/70s in the mountains.

.TODAY...

Sky/weather.........Partly to mostly sunny. Slight chance of
                    rain/snow showers this afternoon.
CWR.................0 percent.
LAL.................1.
Max temperature.....48 to 52 degrees.
Min humidity........25 to 30 percent.
Wind (20 ft)........West/northwest winds 8 to 14 mph. Gusts up to 24 mph
                    late in the afternoon.
Mixing height.......8000 ft AGL.
Transport winds.....Northwest 7 to 14 mph.
Haines Index........3.
Rainfall amount.....0.00 inches.
Snow level..........5800-6600 ft increasing to 6800-7600 ft in the
                    afternoon.

TIME (MDT)      7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM
Sky (%).........50  43  33  34  41  43  54  53  57  51  57  48
Weather cov.....
Weather type....
Tstm cov........
CWR.............0   0   0   0   0   0   0   0   0   0   0   0
LAL.............1   1   1   1   1   1   1   1   1   1   1   1
Temp............31  32  34  38  40  43  45  47  49  50  50  51
RH..............75  69  64  55  49  40  36  30  27  26  26  26
20 FT wind dir..NW  NW  NW  NW  N   NW  NW  NW  NW  NW  W   W
20 FT wind spd..5   5   5   5   5   6   7   8   9   11  11  12
20 FT wind gust.7   7   8   10  10  12  14  16  17  18  18  19
Mix hgt (kft)...1.1 2.0 2.6 3.5 4.1 5.4 6.4 7.6 8.0 7.8 7.4 7.0
Transp wind dir.NW  N   N   N   NW  NW  NW  W   W   W   W   W
Transp wind spd.7   8   9   9   9   9   9   10  12  14  14  16
Haines index....3   3   3   3   3   3   3   3   3   3   3   3
Snow lvl (kft)..5.8 5.9 6.0 6.2 6.5 6.6 6.8 7.0 7.2 7.4 7.6 7.7

.TONIGHT...

Sky/weather.........Partly to mostly cloudy.
CWR.................0 percent.
LAL.................1.
Min temperature.....36 to 40 degrees.
Max humidity........50 to 55 percent.
Wind (20 ft)........West winds 8 to 12 mph with gusts to around 20
                    mph shifting to the southwest 6 to 10 mph
                    overnight.
Mixing height.......100 ft AGL.
Transport winds.....Southwest 10 to 16 mph.
Haines Index........3.
Rainfall amount.....0.00 inches.
Snow level..........6800-7700 ft decreasing to 6500-6900 ft
                    overnight.

.WEDNESDAY...

Sky/weather.........Mostly cloudy. Chance of rain and snow showers
                    in the morning, then chance of showers and
                    thunderstorms in the afternoon.
CWR.................20 percent increasing to 80 percent in the
                    afternoon.
LAL.................1 until 1200, then 3.
Max temperature.....46 to 50 degrees.
Min humidity........40 to 45 percent.
Wind (20 ft)........West/southwest winds 12 to 15 mph with gusts
                    up to 25 to 30 mph. Gusty and erratic winds
                    expected near thunderstorms in the afternoon.
Mixing height.......5000 ft AGL.
Transport winds.....Southwest 15 to 25 mph.
Haines Index........3.
Rainfall amount.....0.20 inches.
Snow level..........6700-7300 ft increasing to 7700-7900 ft late in
                    the morning.

$$
Forecaster...MacKay
Requested by...Jace James
Type of request...PRESCRIBED
.TAG 2414214.3/PIH
.DELDT 05/21/24
.FormatterVersion 2.0.0
.EMAIL jace.james@usda.gov