Area Forecast Discussion
Issued by NWS Riverton, WY

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FXUS65 KRIW 282127
AFDRIW

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE RIVERTON WY
327 PM MDT TUE JUL 28 2015

.SHORT TERM...TONIGHT THROUGH WEDNESDAY

WV SHOWING UNUSUALLY STRONG UPPER LEVEL LOW...THAT BROUGHT
YESTERDAYS ACTIVE WEATHER...CURRENTLY ACROSS SOUTHERN
SASKATCHEWAN WILL PUSH EASTWARD INTO MANITOBA TONIGHT. THE
LINGERING PRESSURE GRADIENT FROM THIS SYSTEM HAS CAUSED
BREEZY...ALTHOUGH NOT AS BREEZY WINDS AS YESTERDAY...TO LINGER
THROUGH THE EARLY AFTERNOON TODAY. EXPECT THESE WINDS TO DIMINISH
FROM WEST TO EAST LATE THIS AFTERNOON THROUGH THE EARLY EVENING
HOURS AS THE TIGHT GRADIENT MOVES INTO THE DAKOTAS. SOME MOISTURE
WRAPPING AROUND THIS SYSTEM HAS ALLOWED DEVELOPMENT OF A FEW
CLOUDS ACROSS NORTHERN WY. GENERALLY DRY CONDITIONS ARE EXPECTED
THIS AFTERNOON THROUGH TONIGHT...ALTHOUGH CAN NOT RULE OUT A VERY
ISOLATED SHOWER ACROSS NW WYOMING THROUGH EARLY THIS EVENING.
SKIES WILL CLEAR TONIGHT...AND WITH DIMINISHING WINDS...COOL TEMPS
WILL ONCE AGAIN BE FOUND. PORTIONS OF WESTERN WYOMING MAY ONCE
AGAIN SEE LOW TEMPERATURES TONIGHT BELOW FREEZING...WITH NEAR
FREEZING TEMPS POSSIBLY GETTING INTO THE WESTERN VALLEYS.

WEDNESDAY...HIGH PRESSURE WILL BUILD ACROSS THE GREAT BASIN AND
SEND VERY DRY WESTERLY FLOW ACROSS THE REGION. WINDS WILL REMAIN
LIGHT DURING THE DAY...HOWEVER...DRY AIR WILL REMAIN...WITH AFTERNOON
RH VALUES EXPECTED TO BE IN THE TEENS ACROSS THE SOUTH AND AREAS EAST
OF THE DIVIDE...WITH 20S IN THE WEST. WARMING TREND WILL BEGIN
WEDNESDAY...HOWEVER TEMPS WILL STILL BE SLIGHTLY BELOW NORMAL.
WITH DRY AIR OVERHEAD...NO PRECIPITATION IS EXPECTED FOR
WEDNESDAY.

.LONG TERM...WEDNESDAY NIGHT THROUGH TUESDAY

QUIET SHORT TERM AS UPPER RIDGE AROUND THE 4-CORNERS REGION. MAIN
WEATHER WILL CONSIST OF A WARMING TREND WITH A VERY LOW AFTERNOON
RH. OVER THE WEEKEND...A LITTLE BIT OF MAINLY MID/HI LEVEL MOISTURE
AND WEAK DISTURBANCES ROTATE AROUND THIS HIGH INTO THE NORTH WITH A
FEW THUNDERSTORMS LIKELY STARTING TO FORM IN THE AFTERNOON AND
EVENING. EARLY NEXT WEEK...IT LOOKS LIKE A LITTLE MORE MOISTURE
ROTATES AROUND THE 4-CORNERS HIGH AND COMBINES WITH A POTENTIAL COOL
FRONT THAT DROPS DOWN INTO THE NRN ZONES. SO ISOLATED TSTMS AT LEAST
FOR THE HIGHER TERRAIN AND DOWNWIND AREAS. A FEW WILL LIKELY TRACK
SE ONTO THE LOWER ELEVATIONS BY EVENING. A LITTLE BETTER MOISTURE
YET ON TUESDAY WILL PRODUCE A FEW MORE STORMS ACROSS MOST OF THE
AREA WITH THE SERN ZONES SEEING VERY LITTLE OR JUST A STRAY STORM OR
TWO. GUSTY WIND AND LIGHTNING WILL BE THE MAIN THREAT FROM THESE
STORMS WITH STILL LIMITED LOW LEVEL MOISTURE. BECOMING QUITE WARM TO
HOT THROUGH THE WEEKEND WITH COOLING MONDAY INTO TUESDAY...
ESPECIALLY BEHIND THE FRONT IN THE NORTH HALF.


&&

.AVIATION.../00Z ISSUANCE/

BREEZY WEST FLOW WILL DIMINISH FROM WEST TO EAST EARLY THIS
EVENING...WITH SOME LINGERING WIND GUSTS IN THE KCPR AREA OF
AROUND 2O KNOTS THROUGH 03Z WEDNESDAY. SCT CLOUDS ACROSS NORTHERN
WYOMING COULD CONTINUE THROUGH THE EARLY EVENING HOURS...THEN
DIMINISH SHORTLY AFTER SUNSET THIS EVENING...OR BY 06Z WEDNESDAY.
AN ISOLATED SHOWER IS ALSO POSSIBLE ACROSS NW WYOMING EARLY THIS
EVENING...MAINLY WEST OF KCOD...AND THROUGH 03Z WEDNESDAY. SKIES
WILL CLEAR AND WINDS WILL DIMINISH TONIGHT. VFR CONDITIONS...WITH
ONLY A FEW MID LEVEL CU WILL THEN BE IN STORE FOR WEDNESDAY.

&&

.FIRE WEATHER...

BREEZY WINDS...CURRENTLY FOUND ACROSS CENTRAL AND EASTERN
WYOMING...WILL BEGIN TO DIMINISH DURING THE LATE AFTERNOON AND
EARLY EVENING HOURS. WITH RH VALUES CURRENTLY IN THE LOW TO MID
TEENS...ELEVATED FIRE DANGER WILL CONTINUE UNTIL WINDS COMPLETELY
DIMINISH THIS EVENING. ANOTHER COOL...DRY...AND MAINLY CLEAR
NIGHT IS THEN EXPECTED. A WARMING TREND WILL THEN BEGIN
WEDNESDAY...AND CONTINUE THROUGH THE WEEKEND. LIGHT WINDS WILL BE
FOUND THROUGH THE END OF THE WEEK...HOWEVER...VERY DRY AIR WILL
CONTINUE ACROSS THE AREA...WITH MIN RH IN THE LOW TO MID TEENS
EACH DAY ACROSS THE SOUTH AND AREAS EAST OF THE DIVIDE...AND IN
THE 20S ACROSS THE WEST. NO PRECIPITATION IS EXPECTED THROUGH THE
END OF THE WORK WEEK.

&&

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

$$

SHORT TERM...ANGLIN
LONG TERM...SKRBAC
AVIATION...ANGLIN
FIRE WEATHER...ANGLIN



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