Area Forecast Discussion
Issued by NWS Riverton, WY

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FXUS65 KRIW 012042
AFDRIW

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE RIVERTON WY
242 PM MDT WED JUL 1 2015

.SHORT TERM...TONIGHT THROUGH THURSDAY

RADAR INDICATING SOME SHOWER DEVELOPMENT AROUND THE WASHAKIE NEEDLES
THIS AFTERNOON...WITH ACTIVITY STREAMING EASTWARD AND WEAKENING OVER
THE OWL CREEK MOUNTAINS AND INTO THE WIND RIVER BASIN.
ADDITIONALLY...SHOWER ACTIVITY CONTINUES TO MOVE ACROSS EASTERN
SWEETWATER COUNTY WHERE IT HAS BEEN MOST CONSISTENT THIS
AFTERNOON. THE FORECAST HAS BEEN UPDATED TO REFLECT THIS
POTENTIAL ACROSS SOUTHERN WYOMING. ISOLATED ACTIVITY MAY SPREAD
TO INCLUDE MUCH OF THE AREA EAST OF THE DIVIDE THROUGH THIS
EVENING.

SHOWER ACTIVITY WILL WANE WITH THE LOSS OF DAYLIGHT THIS
EVENING...WITH WIDESPREAD DRY CONDITIONS EXPECTED OVERNIGHT. ANOTHER
SURGE OF MOISTURE WILL BRING A FEW SHOWERS AND THUNDERSTORMS OVER
THE AREA THURSDAY AFTERNOON. MOST ACTIVITY IS EXPECTED TO REMAIN
CONFINED TO THE MOUNTAIN AREAS.

.LONG TERM...THURSDAY NIGHT THROUGH WEDNESDAY

OVERALL...WEST-NORTHWEST FLOW ALOFT WILL PERSIST OVER WEST CENTRAL
WYOMING. GENERALLY DRY AND VERY WARM ON FRIDAY AND FOR THE FOURTH OF
JULY...ALTHOUGH A FEW THUNDERSTORMS COULD DEVELOP OVER MOUNTAIN
RANGES DURING THE AFTERNOON HOURS.

ACTIVE NORTHERN STREAM THEN BRINGS A COLD FRONT ACROSS WYOMING ON
SUNDAY. AFTERNOON HEATING COMBINED WITH THIS BOUNDARY SHOULD RESULT
IN SCATTERED AFTERNOON AND EVENING THUNDERSTORMS. COULD BE SOME
LINGERING SHOWERS ESPECIALLY EAST OF THE DIVIDE THROUGH SUNDAY
NIGHT...SO SUNDAY AND EARLY MONDAY LOOK TO BE THE WETTEST DAYS OF
THE WEEK.

COOLER...MORE STABLE AIR THEN MOVES INTO THE FORECAST AREA MONDAY
NIGHT AND TUESDAY. MEDIUM RANGE PATTERN LOOKS TO BE WEAK WESTERLY
FLOW ALOFT WITH MARGINAL INSTABILITY. SO AFTER SUNDAY NIGHT...SHOULD
BE THE TYPICAL ISOLATED TO WIDELY SCATTERED AFTERNOON AND EVENING
THUNDERSTORMS FOR BOTH MOUNTAINS AND BASINS. TEMPERATURES WILL BE
AROUND NORMAL THROUGH THE EXTENDED PERIOD.

&&

.AVIATION.../00Z ISSUANCE/

SHOWERS AND THUNDERSTORMS TO CONTINUE THROUGH 03Z THIS EVENING.
ACTIVITY EXPECTED TO REMAIN OVER AREAS OF SOUTHERN WYOMING WITH AN
INCREASING PRESENCE EAST OF THE DIVIDE AS WELL. THESE THUNDERSTORMS
MAY PRODUCE PERIODS OF MVFR CONDITIONS WITH RAIN...AND MAY BRING
INSTANCES OF GUSTY AND ERRATIC WIND. IMPACTED TERMINALS HAVE HAD
VCTS INCLUDED IN THEIR FORECAST. THE HIGHER TERRAINS WILL ALSO
CONTINUE TO SEE SHOWER AND THUNDERSTORM ACTIVITY WHICH MAY
INCREASE THEIR TURBULENCE ACTIVITY THIS AFTERNOON AND INTO THE
EVENING. CLEARING CONDITIONS EXPECTED AFTER 04Z THIS EVENING WITH
WIDESPREAD VFR CONDITIONS EXPECTED THROUGH 18Z THURSDAY. ANOTHER
WEAK SURGE OF MOISTURE CAN INITIATE SHOWERS AND THUNDERSTORMS OVER
THE MOUNTAINS AFTER 18Z...WITH SOME ACTIVITY POSSIBLE TO MOVE OVER
THEIR ADJACENT TERMINALS. VCTS HAS BEEN INCLUDED AT POSSIBLE WITH
A RISK OF STORM DEVELOPMENT.

&&

.FIRE WEATHER...

WARM AND MOSTLY DRY CONDITIONS EXPECTED THROUGH INDEPENDENCE DAY.
SOME ISOLATED SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE OVER THE
MOUNTAIN AREAS EACH AFTERNOON...WHICH MAY SEND SOME GUSTY AND
ERRATIC WIND INTO THE LOWER ELEVATIONS. ADDITIONAL SHOWER AND
THUNDERSTORM ACTIVITY ANTICIPATED STARTING SUNDAY AS MORE MOISTURE
AND INSTABILITY MOVES OVER THE AREA.

&&

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

$$

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



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