Area Forecast Discussion
Issued by NWS Riverton, WY

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000
FXUS65 KRIW 260954
AFDRIW

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE RIVERTON WY
354 AM MDT THU MAR 26 2015

.SHORT TERM...TODAY THROUGH SATURDAY NIGHT
SATELLITE DEMONSTRATES SOME OF THE LAST MOISTURE TO BE ARRIVING
ACROSS NORTHERN WYOMING THIS MORNING. THIS PUSH OF MOISTURE MAY
GENERATE A FEW SHOWERS THROUGH THE EARLY MORNING HOURS. SHOWERS WILL
TAPER OFF THROUGH THE MORNING AND AFTERNOON AS HIGH PRESSURE BUILDS
OVER THE AREA. GENERALLY DRY CONDITIONS ARE EXPECTED BY AROUND
MIDNIGHT.

THIS HIGH PRESSURE WILL REMAIN THE PREVAILING WEATHER PATTERN FOR
THE NEXT COUPLE OF DAYS...WITH WARMING TEMPERATURES AND DRY
CONDITIONS. AN APPROACHING WAVE OF LOW PRESSURE WILL ENTER THE
PACIFIC NORTHWEST EARLY SATURDAY...AND MOVE INTO THE INTERMOUNTAIN
WEST BY SATURDAY AFTERNOON. AS THIS SYSTEM APPROACHES THE AREA...IT
WILL GENERATE SOME SHOWER ACTIVITY ACROSS NORTHERN WYOMING...MAINLY
THROUGH SATURDAY EVENING. MODELS DO HAVE SOME DISAGREEMENT WITH
TIMING REGARDING THIS LATE PERIOD SYSTEM...RESULTING IN LOWERED
PRECIPITATION PROBABILITIES IN THE FORECAST. REGARDLESS TO
TIMING...MODELS DO INDICATE SOME DECENT INSTABILITY ACROSS THE AREA
SATURDAY AFTERNOON...POTENTIALLY RESULTING IN A FEW THUNDERSTORMS
WITH THE APPROACHING SYSTEM. CONDITIONS WILL CONTINUE TO BE
MONITORED.

.LONG TERM...SUNDAY THROUGH WEDNESDAY
WEAK RIDGING OVER THE ROCKIES THROUGH MOST OF THE EXTENDED PERIOD. A
SHORTWAVE FINALLY BREAKS DOWN RIDGE BY TUESDAY AFTERNOON. IMPACT
FROM THIS SHORTWAVE MAINLY TO BE FELT OVER THE WESTERN AND
NORTHERN MOUNTAINS OF WYOMING. THERE SHOULD BE AT LEAST WIDELY
SCATTERED SHOWERS DUE TO LIFT ALONE LATER ON TUESDAY. TUESDAY
EVENING AND NIGHT COULD BRING MORE WIDESPREAD SNOW SHOWERS TO BOTH
THE BIGHORN AND ABSAROKA RANGES. STRONG WESTERLY FLOW TO RESULT IN
BREEZY TO STRONG SURFACE WIND OVER THE MOUNTAINS AND LOWER
ELEVATIONS EAST OF THE DIVIDE TUESDAY INTO TUESDAY NIGHT.

DAYTIME TEMPERATURES WILL BE MILD MONDAY AND CONTINUED WARM ON
TUESDAY...ESPECIALLY EAST OF THE DIVIDE. COLD FRONT ASSOCIATED WITH
AFOREMENTIONED SHORTWAVE THEN MOVES ACROSS FORECAST AREA BY TUESDAY
EVENING. THIS WILL BRING COOLER TEMPERATURES FOR WEDNESDAY. MOST OF
WEST CENTRAL WYOMING GENERALLY UNDER THE INFLUENCE OF DRY WESTERLY
FLOW ON WEDNESDAY INTO WEDNESDAY NIGHT.

&&

.AVIATION.../12Z ISSUANCE/
VFR CONDITIONS WILL PREVAIL ACROSS THE AREA THROUGH 12Z FRIDAY.
GUSTY W-NW WINDS ALONG THE LEE SLOPES OF THE DIVIDE...VCNTY
KCOD-KRIW...WILL CONTINUE AT TIMES. THE WIND IN THESE AREAS WILL
LIKELY INCREASE AGAIN LATER THIS AFTERNOON INTO THE EVENING.
OTHERWISE...THE SKY SHOULD BE MOSTLY CLEAR THROUGH FRIDAY.

&&

.FIRE WEATHER...
SHOWER ACTIVITY WILL TAPER OFF THROUGH THE EVENING HOURS...WITH
WIDESPREAD DRY CONDITIONS EXPECTED BY THE OVERNIGHT HOURS. HIGH
PRESSURE WILL BEING WARMING AND GENERALLY DRY CONDITIONS THROUGH
FRIDAY NIGHT ACROSS THE AREA. DURING THIS TIME...DAYTIME RELATIVE
HUMIDITY WILL DECREASE...WITH SOME TEENS ANTICIPATED BY SATURDAY.
THESE LOWERED HUMIDITIES WILL BE FOUND AHEAD OF AN APPROACHING WAVE
OF LOW PRESSURE...WHICH SHOULD REACH INTO THE STATE BY SATURDAY
MORNING. SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE WITH THIS SYSTEM
AS IT MOVES THROUGH THE FORECAST AREA...POTENTIALLY BRINGING SOME
GUSTY AND ERRATIC WIND.

&&

.RIW WATCHES/WARNINGS/ADVISORIES...NONE.
&&

$$

SHORT TERM...BRANHAM
LONG TERM...KPL
AVIATION...KPL
FIRE WEATHER...BRANHAM




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