Area Forecast Discussion
Issued by NWS Riverton, WY

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FXUS65 KRIW 311808
AFDRIW

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE RIVERTON WY
1108 AM MST SUN JAN 31 2016

.SHORT TERM...TODAY THROUGH TUESDAY NIGHT

ISSUED WINTER WEATHER ADVISORY FROM MONDAY MORNING THROUGH
TUESDAY MORNING FOR SNOW AND BLOWING SNOW ACROSS NATRONA...
FREMONT...SWEETWATER AND SOUTHERN LINCOLN COUNTIES.
CENTRAL AND SOUTHERN WYOMING WILL BE ON THE NORTHWEST EDGE OF A
LARGE WINTER STORM THAT WILL BE MOVING THROUGH THE SOUTHERN AND
CENTRAL ROCKIES MONDAY AND MONDAY NIGHT. NATRONA...FREMONT...
SWEETWATER AND SOUTHERN LINCOLN COUNTIES ARE EXPECTED TO SEE SNOW
DEVELOP MONDAY MORNING WITH BRISK NORTHEAST WINDS. BY MONDAY
AFTERNOON SIGNIFICANT SNOW AND BLOWING SNOW IS EXPECTED. THE SNOW
AND BLOWING SNOW SHOULD CONTINUE THROUGH MONDAY NIGHT AND TAPER
OFF TUESDAY MORNING.

&&

.LONG TERM...WEDNESDAY THROUGH SUNDAY

NW FLOW ALOFT FOR WEDNESDAY. DRY FOR THE LOWER ELEVATIONS.
SCATTERED SNOW FOR THE WESTERN MOUNTAINS AS SOME MOISTURE IN THE
FLOW. NORTHERN BIGHORN MOUNTAINS MAY SEE SCATTERED SNOW AS WELL.
DRY WEDNESDAY NIGHT EAST OF THE DIVIDE AND OVER THE SW. SOME LIGHT
SNOW TO LINGER IN THE NW MOUNTAINS AS UPGLIDE PERSISTS. ON
THURSDAY MOISTURE INCREASES OVER THE WEST AHEAD OF A WEATHER
SYSTEM THAT ARRIVES THURS NIGHT AND DEPARTS FRIDAY AFTERNOON.
THIS WILL BRING ANOTHER SHOT OF SNOW TO THE WEST. EAST OF THE
DIVIDE...DRY THURSDAY. THEN A CHANCE OF LIGHT SNOW THURS NIGHT
INTO FRIDAY AS THE WEATHER SYSTEM PASSES BY. DRY FRI NIGHT.
SATURDAY LOOKS DRY AS WELL. GFS/ECMWF MODELS HINT AT ANOTHER
WEATHER SYSTEM IMPACTING THE WEST NEXT SUNDAY. LOW PRECIP CHANCE
IN THE FAR WEST FOR NOW AND SEE HOW THINGS LOOK TONIGHT. AS FOR
TEMPS...COLD WEDNESDAY...LITTLE MILDER THURS AND FRI. EVEN MILDER
NEXT SATURDAY/SUNDAY. HOWEVER...POTENTIAL FOR BASIN INVERSIONS TO
DEVELOP WHICH WOULD HOLD DOWN HIGHS IN THE SNOW COVERED BASINS.

&&

.AVIATION.../18Z ISSUANCE/

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

ISOLATED TO LOCALLY SCATTERED SNOW SHOWERS OVER THE WEST/NORTHWEST...
MAINLY NW OF KAFO-KPNA LINE. WINDS WILL BE LIGHT TODAY.
TONIGHT...AS A STORM SYSTEM BEGINS TO DEVELOP...NORTHEAST WINDS
ARE EXPECTED TOO DEVELOP IN MOST AREA...WITH BREEZY TO WINDY
NORTHEAST WINDS ACROSS MUCH OF SWEETWATER COUNTY AFTER 06Z MONDAY.
ALTHOUGH SOME SNOW COULD BEGIN TO BREAK OUT OVER THE SOUTH AFTER
06Z MONDAY...MOST OF THE SNOWFALL SHOULD HOLD OFF UNTIL AFTER 12Z
MONDAY. WIDESPREAD IFR CONDITIONS ARE EXPECTED BY 15Z MONDAY
ACROSS THE SOUTH. TO THE NORTH...AREAS OF MVFR CEILINGS WITH LIGHT
SNOW CAN BE EXPECTED...ESPECIALLY OVER THE MOUNTAINS.

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

EXPECT VFR CONDITIONS AND MAINLY LIGHT WINDS TODAY. AFTER 06Z
MONDAY...NORTHEAST WINDS ARE EXPECTED TO DEVELOP IN RESPONSE TO A
SURFACE LOW PUSHING INTO THE FOUR CORNERS REGION. SOME LOW
CEILINGS AND LIGHT SNOW COULD BEGIN TO FORM BETWEEN 08Z AND
12Z...WITH KCPR BEING IMPACTED THE MOST FROM THIS ACTIVITY.
WIDESPREAD IFR CONDITIONS ARE EXPECTED BY 15Z MONDAY ACROSS
NATRONA...FREMONT AND SWEETWATER COUNTIES. TO THE NORTH...AREAS
OF MVFR CEILINGS WITH LIGHT SNOW CAN BE EXPECTED...ESPECIALLY OVER
THE MOUNTAINS.

&&

.FIRE WEATHER...

ISSUED WINTER WEATHER ADVISORY FROM MONDAY MORNING THROUGH
TUESDAY MORNING FOR SNOW AND BLOWING SNOW ACROSS NATRONA...
FREMONT...SWEETWATER AND SOUTHERN LINCOLN COUNTIES.
CENTRAL AND SOUTHERN WYOMING WILL BE ON THE NORTHWEST EDGE OF A
LARGE WINTER STORM THAT WILL BE MOVING THROUGH THE SOUTHERN AND
CENTRAL ROCKIES MONDAY AND MONDAY NIGHT. NATRONA...FREMONT...
SWEETWATER AND SOUTHERN LINCOLN COUNTIES ARE EXPECTED TO SEE SNOW
DEVELOP MONDAY MORNING WITH BRISK NORTHEAST WINDS. BY MONDAY
AFTERNOON SIGNIFICANT SNOW AND BLOWING SNOW IS EXPECTED. THE SNOW
AND BLOWING SNOW SHOULD CONTINUE THROUGH MONDAY NIGHT AND TAPER
OFF TUESDAY MORNING. HIGH RELATIVE HUMIDITY WITH LOW MIXING
HEIGHTS AND POOR SMOKE DISPERSAL IS EXPECTED THROUGH TUESDAY.

&&

.RIW WATCHES/WARNINGS/ADVISORIES...
WINTER WEATHER ADVISORY FROM 9 AM MONDAY TO 9 AM MST TUESDAY FOR
WYZ015-018>020-022-027>030.

&&

$$

SHORT TERM...C.BAKER
LONG TERM...AR
AVIATION...C.BAKER
FIRE WEATHER...ALLEN


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