Area Forecast Discussion
Issued by NWS Riverton, WY

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FXUS65 KRIW 062201
AFDRIW

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE RIVERTON WY
301 PM MST SAT FEB 6 2016

.SHORT TERM...TONIGHT THROUGH SUNDAY

PERIODS OF LIGHT SNOWFALL WILL CONTINUE OVER WESTERN WYOMING WITH
INSIGNIFICANT ANTICIPATED NEW ACCUMULATIONS. SNOWFALL WILL WORK TO
TAPER OFF OVERNIGHT AS HIGH PRESSURE GAINS STRENGTH OVER THE AREA.
GENERALLY DRY CONDITIONS EXPECTED BY SUNDAY AFTERNOON.

THE BIGGER STORY FOR TODAY REMAINS WIND ACROSS THE AREA. THE
STRONGEST WINDS ARE ANTICIPATED OVER NATRONA AND SOUTHEASTERN
FREMONT COUNTIES. A HIGH WIND WARNING REMAINS IN EFFECT FOR THIS
AREA...WITH GUSTS TO 60 MPH POSSIBLE THROUGH THE EARLY EVENING
HOURS. WIND SHOULD WEAKEN DURING THE OVERNIGHT HOURS.

PERIODS OF GUSTY WIND WILL RETURN ON SUNDAY AFTERNOON...THOUGH
WIND IS NOT EXPECTED TO REACH THE SAME MAGNITUDE AS THIS
AFTERNOON.

.LONG TERM...SUNDAY NIGHT THROUGH SATURDAY

A LONG WAVE HIGH PRESSURE RIDGE OVER THE WESTERN U.S. WEST OF
WYOMING WILL DOMINATE THE WEATHER ACROSS WESTERN AND CENTRAL WYOMING
THROUGH NEXT WEEK WITH NORTHWEST FLOW ALOFT.  SOME CLOUDS MAY
SPILLOVER THE RIDGE AND SOME LEE ENHANCED CLOUDS MAY ALSO FORM BUT
OVERALL THE AIR MASS WILL BE DRY WITH FEW CLOUDS OVERALL.  WINDS
SHOULD PICK UP SOME WEDNESDAY AND THURSDAY ACROSS THE SOUTHWEST AND
EAST OF THE CONTINENTAL DIVIDE.  TEMPERATURES WILL WARM IN THE WINDY
AREAS AND LOW TEMPERATURES WILL BE THE MAIN FORECAST CHALLENGE IN
THE EXTENDED FORECAST. A PACIFIC TROUGH MAY WORK ITS WAY THROUGH THE
RIDGE LATE THURSDAY AND THURSDAY NIGHT WITH BROKEN CLOUDS AND
ISOLATED SNOW SHOWERS IN THE NORTHWEST MOUNTAINS.  ACROSS THE SOUTH
AND ALONG AND NEAR THE EAST SLOPES OF THE MOUNTAINS INCREASED
DOWNSLOPE WINDS EAST OF THE CONTINENTAL DIVIDE ARE EXPECTED WITH
INCREASED WARMING.  THE RIDGE WILL QUICKLY REBUILD FRIDAY AND FRIDAY
NIGHT BEFORE ANOTHER PACIFIC TROUGH WORKS ITS WAY EAST INTO
WESTERN WYOMING SATURDAY AFTERNOON WITH MORE ISOLATED SNOW SHOWERS
IN THE NORTHERN AND WESTERN MOUNTAINS.


&&

.AVIATION.../00Z ISSUANCE/

WEST OF THE CONTINENTAL DIVIDE...KBPI/KJAC/KPNA/KRKS

PERIODS OF LIGHT SNOW MAY BRING INSTANCES OF MVFR CONDITIONS TO
KJAC THROUGH 07Z THIS EVENING. OTHERWISE...THE WESTERN MOUNTAINS
WILL CONTINUE TO SEE LIGHT SNOWFALL THROUGH THE PERIOD WITH
ANTICIPATED MOUNTAIN TOP OBSCURATIONS. OTHER TERMINALS ACROSS THE
AREA WILL GENERALLY REMAIN VFR...THOUGH PERIODS OF GUSTY WIND WILL
BE NOTED ACROSS THE AREA. THE STRONGEST WIND LOOKS TO IMPACT KRKS
THROUGH AROUND 03Z THIS EVENING. BUILDING HIGH PRESSURE WILL TAPER
OFF LINGERING SNOWFALL BY 20Z SUNDAY. SOME INSTANCES OF GUSTY
WIND MAY RETURN AFTER 18Z SUNDAY.

EAST OF THE CONTINENTAL DIVIDE...KCOD/KCPR/KLND/KRIW/KWRL

STRONG WIND WILL BE FOUND ACROSS THE AREA TODAY...ESPECIALLY
IMPACTING KCPR AND AREAS AROUND THE KCPR TERMINAL. WIND GUSTS TO
50KT MAY BE POSSIBLE AT TIMES...ESPECIALLY CLOSER TO CASPER
MOUNTAIN. ELSEWHERE GUSTY WIND WILL BE FOUND ACROSS KBYG THROUGH
THE AFTERNOON...WITH OTHER TERMINALS REMAINING GENERALLY LIGHT.
CONDITIONS TO REMAIN VFR AS SNOWFALL REMAINS MOSTLY WEST OF THE
CONTINENTAL DIVIDE. ADJACENT MOUNTAINS COULD SEE SOME LIGHT
SNOWFALL WITH OBSCURED MOUNTAIN TOPS THROUGH THE AFTERNOON AND
EVENING. HIGH PRESSURE WILL END SNOWFALL BY 20Z SUNDAY WITH
WIDESPREAD VFR CONDITIONS. A RETURN OF GUSTY WIND AFTER 18Z IS
POSSIBLE...BUT WIND IS NOT CURRENTLY EXPECTED TO BE AS STRONG AS
TODAY.


&&

.FIRE WEATHER...

PERIODS OF STRONG WIND WILL REMAIN ACROSS PORTIONS OF CENTRAL AND
EASTERN WYOMING THROUGH THIS EVENING. SNOWFALL WILL ALSO REMAIN
PRESENT OVER AREAS OF WESTERN WYOMING...WITH SNOWFALL GENERALLY
TAPERING OFF THROUGH THE OVERNIGHT HOURS. HIGH PRESSURE WILL GAIN
DOMINANCE OVER THE AREA ON SUNDAY AFTERNOON...THOUGH A RETURN OF
GUSTY WIND IS POSSIBLE. AS HIGH PRESSURE SETTLES FURTHER DURING
THE WORK WEEK...WIND WILL RELAX ACROSS THE AREA. MIXING HEIGHTS
ARE EXPECTED TO REMAIN LOW ACROSS THE LOWER ELEVATIONS...KEEPING
SMOKE DISPERSAL CATEGORIES ON THE LOWER SIDE.

&&

.RIW WATCHES/WARNINGS/ADVISORIES...
HIGH WIND WARNING UNTIL 11 PM MST THIS EVENING FOR WYZ019-020.

&&

$$

SHORT TERM...BRANHAM
LONG TERM...C.BAKER
AVIATION...BRANHAM
FIRE WEATHER...BRANHAM


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