Area Forecast Discussion
Issued by NWS Riverton, WY

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary Off
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

000
FXUS65 KRIW 251455
AFDRIW

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE RIVERTON WY
854 AM MDT WED MAR 25 2015

.SHORT TERM...TODAY THROUGH FRIDAY NIGHT
UPDATED TO EXPIRE THE WINTER WEATHER ADVISORY FOR NATRONA COUNTY.

SHOWERS CONTINUE TO MOVE THROUGH THE FORECAST AREA THIS MORNING.
COVERAGE IS WEAKENING OVER WESTERN WYOMING THOUGH SOME LIGHT SHOWERS
ARE NOT OUT OF THE QUESTION. HEAVIER SHOWER ACTIVITY STILL FAVORED
OVER THE BIGHORN MOUNTAINS AND INTO NATRONA COUNTY FOR A FEW MORE
HOURS...AS RADAR CONTINUES TO INDICATE A DECENT STREAM OF MOISTURE
MOVING THROUGH THE AREA. SHOWER COVERAGE AND INTENSITY WILL WEAKEN
THROUGH THE MORNING HOURS AS NORTHWEST FLOW BUILD OVER THE AREA.
SOME ENHANCED CONVECTIVE PARAMETERS THIS AFTERNOON WILL KEEP THE
OPPORTUNITY FOR SHOWER DEVELOPMENT. ACTIVITY WILL WEAKEN THROUGH THE
EVENING AND OVERNIGHT HOURS AS NORTHWEST FLOW STRENGTHENS.

HIGH PRESSURE WILL WORK ITS WAY THROUGH THE INTERMOUNTAIN WEST ON
THURSDAY. SOME ISOLATED AFTERNOON SHOWERS WILL REMAIN POSSIBLE...
MAINLY ACROSS THE NORTH. GUSTY WIND IS ALSO POSSIBLE...ESPECIALLY
ACROSS THE SOUTH. WARMING TEMPERATURES EXPECTED THURSDAY...WITH
GENERALLY DRY CONDITIONS ANTICIPATED BY EARLY FRIDAY MORNING.
FURTHER WARMING EXPECTED ON FRIDAY...WITH DRY CONDITIONS PERSISTING.

.LONG TERM...SATURDAY THROUGH TUESDAY
MODELS IN FAIRLY GOOD AGREEMENT THROUGH THE EXTENDED PERIOD. THE
BIG MESSAGE IS THAT CANNOT SEE ANY SYSTEM THAT WELL ORGANIZED...THEREFORE
SPRINGTIME WEATHER WILL CONTINUE FOR MOST OF THE FORECAST AREA.

THERE IS A NORTHERN STREAM SHORTWAVE APPROACHING WYOMING ON
SATURDAY. IMPACT LOOKS TO BE SOME SNOW IN THE MOUNTAINS WITH GUSTY
WIND ON THE LEE OF THE MOUNTAINS. THIS DOWNSLOPE WIND WILL WARM
TEMPERATURES EAST OF THE DIVIDE ON SATURDAY. A COLD FRONT ASSOCIATED
WITH THE SHORTWAVE SHOULD PUSH ACROSS CENTRAL AND EASTERN WYOMING BY
SATURDAY EVENING.

MODELS INDICATE A WESTERLY FLOW ALOFT TO CONTINUE...BUT CLEARING
IS LIKELY SATURDAY NIGHT. HEIGHTS BUILD ALOFT ON SUNDAY FOR FAIR
CONDITIONS THROUGH EARLY MONDAY. COOL TEMPERATURES FOR SUNDAY NIGHT.

AGAIN...NO CLEAR CUT SHORTWAVE IN THE MONDAY THROUGH EARLY TUESDAY
TIMEFRAME. HOWEVER...SURFACE TEMPERATURES WILL WARM AND AIRMASS
COULD BECOME A BIT UNSTABLE MONDAY AFTERNOON. CANNOT RULE OUT
ISOLATED TO WIDELY SCATTERED SHOWERS...MAINLY OVER AND NEAR THE
MOUNTAINS.

TUESDAY SHOULD START OFF MILD ACROSS THE FORECAST AREA AHEAD OF AN
APPROACHING TROUGH. BEST CHANCE OF PRECIPITATION WILL BE OVER THE
WESTERN MOUNTAINS...INCLUDING YELLOWSTONE NATIONAL PARK...LATER ON TUESDAY.
PATTERN ON TUESDAY COULD ACTUALLY BE QUITE SIMILAR TO SATURDAY
EAST OF THE DIVIDE. THIS GENERALLY RESULTS IN BREEZY TO WINDY CONDITIONS.

&&

.AVIATION.../12Z ISSUANCE/
LOW CLOUDS AND AREAS OF SNOW TO CONTINUE THIS MORNING. MOST OF THE
PRECIPITATION WILL BE FOUND FROM EASTERN FREMONT COUNTY INTO NATRONA
COUNTY. KCPR TO EXPERIENCE BRIEF IFR CONDITIONS BEFORE IMPROVING
LATER THIS MORNING. MVFR POSSIBLE EARLY AT KLND AND KRIW. OTHERWISE...
IMPROVING CONDITIONS FROM WEST TO EAST BY THIS AFTERNOON. SLIGHT
CHANCE OF SNOW SHOWERS TO REMAIN OVER THE MOUNTAINS WITH MORE
WIDESPREAD SNOW OVER THE BIGHORN MOUNTAINS. VFR CONDITIONS THEN
PREVAIL TONIGHT ACROSS WEST CENTRAL WYOMING.

&&

.FIRE WEATHER...
SHOWER ACTIVITY WILL LINGER TODAY AND INTO WEDNESDAY NIGHT...THOUGH
COVERAGE WILL BE LIGHT ONCE THE CURRENT SURGE OF MOISTURE MOVES
THROUGH THE AREA...WITH DRY CONDITIONS EXPECTED BY FRIDAY MORNING.
TEMPERATURES WILL BE SLIGHTLY COOLER TODAY IN RESPONSE TO ACTIVITY
ON TUESDAY... BUT WILL BE ABLE TO WARM THROUGH THE REMAINDER OF THE
WORK WEEK UNDER THE INFLUENCE OF BUILDING HIGH PRESSURE. SOME GUSTY
WIND WILL REMAIN POSSIBLE ACROSS SOUTHERN WYOMING...ESPECIALLY
DURING THE AFTERNOON HOURS.

&&

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

&&

$$

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










USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.