Spot Forecast
Issued by NWS Riverton, WY

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Spot Forecast for Seedskadee NWR pile burn...USFWS
National Weather Service Riverton WY
1143 AM MDT Mon Mar 25 2024

Forecast is based on ignition time of 1200 MDT on March 25.
If conditions become unrepresentative, contact the National Weather
Service

.DISCUSSION...

Temperatures slightly cooler than normal Tuesday, with a mainly west
wind. Winds fairly light in the morning, ranging from 5 to 10 mph,
increasing to around 15 mph in the afternoon, with gusts 20 to 25
mph. There is a 10% to 15% chance of snow showers Tuesday
afternoon. Showers should be coming from the west-to-northwest and
will be isolated in nature, therefore is a `hit or miss` type
chance, warranting the 10% to 15% chances. Nearby showers could
also bring stronger gusts in the vicinity of them, with gusts up
to 30 mph.

Dry Wednesday as brief high pressure passes through. Winds stay
mainly out of the west, and may increase to around 15 mph in the
afternoon, gusting to around 25 mph. An active pattern starts
Thursday, with daily rain and snow chances through the weekend.

...Thunderstorms imply strong gusty and erratic winds...
...Haines index is high level haines both day and night...

.TUESDAY...

Sky/weather.........Partly sunny (50-60 percent).
CWR.................0 percent.
Chance of pcpn......15 percent.
LAL.................1.
Max temperature.....Around 42.
Min humidity........40-45 percent.
Wind (20 ft)........Northwest winds around 6 mph early morning
                    shifting to the west 8 to 14 mph by mid-morning,
                    then increasing to 14 to 18 mph with gusts to
                    around 25 mph in the afternoon.
Ridgetop wind.......West 15 to 20 mph increasing to around 25 mph
                    late in the afternoon.
Mixing height.......700 ft AGL increasing to 5700 ft AGL.
Transport winds.....West 15 to 20 mph increasing to around 25 mph
                    late in the afternoon.
Smoke dispersal.....Poor (8800 knot-ft) early in the morning
                    increasing to good (90900 knot-ft) in the
                    afternoon increasing to very good (119200
                    knot-ft) late in the afternoon.
Haines Index........3 or very low potential for large plume
                    dominated fire growth.

TIME (MDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........37  45  60  61  58  49  61  62  67  68  71  68
Weather cov.....
Weather type....
Tstm cov........
CWR.............0   0   0   0   0   0   0   0   0   0   0   0
Chc of pcpn (%).0   0   0   0   0   0   0   0   10  10  10  10
LAL.............1   1   1   1   1   1   1   1   1   1   1   1
Temp............22  21  23  26  32  35  37  40  40  41  42  41
RH..............90  89  85  76  66  56  50  46  45  43  43  44
20 FT wind dir..N   NW  W   W   W   W   W   W   W   W   W   W
20 FT wind spd..6   6   6   7   8   10  13  16  16  16  15  17
20 FT wind gust.7   10  10  10  11  14  17  20  20  20  19  23
Ridge wind dir..W   W   W   W   W   W   W   W   W   W   W   W
Ridge wind spd..15  15  15  15  15  15  20  20  20  25  25  25
Mix hgt (kft)...0.7 0.7 0.7 1.8 1.8 1.8 5.1 5.1 5.1 5.7 5.7 5.7
Transp wind dir.W   W   W   W   W   W   W   W   W   W   W   W
Transp wind spd.14  14  14  16  16  16  21  21  21  24  24  24
Haines index....3   3   3   3   3   3   3   3   3   3   3   3
SDspl kt-ft/10009   9   9   25  25  25  91  91  91  119 119 119

.FORECAST DAYS 3 THROUGH 5...
.WEDNESDAY...
Partly cloudy. Lows in the lower 20s. Highs in the mid 40s. West
winds around 12 mph.
.THURSDAY...
Mostly cloudy with chance of rain and snow. Lows in the mid 20s.
Highs in the lower 50s. Southwest winds around 8 mph.
.FRIDAY...
Mostly cloudy with chance of snow and rain. Lows in the upper
20s. Highs around 50. Southwest winds around 9 mph.

$$
Forecaster...Wittmann
Requested by...Andy Buyers
Type of request...PRESCRIBED
.TAG 2408394.0/RIW
.DELDT 03/25/24
.FormatterVersion 2.0.0
.EMAIL andrew_buyers@fws.gov


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