779
FXUS65 KRIW 061837
AFDRIW
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE RIVERTON WY
1237 PM MDT WED MAY 6 2026
KEY MESSAGES
- COOL TODAY, WITH HIGHS IN THE LOW-TO-MID 50S.
- SCATTERED SHOWERS MOVE INTO NORTHWEST WYOMING TONIGHT, WITH
LIGHT RAIN/MOUNTAIN SNOW CHANCES (15-40 PERCENT) ACROSS
NORTHERN AND CENTRAL WYOMING THROUGH THURSDAY.
- DRY AND WARMING TREND INTO THE WEEKEND AND EARLY NEXT WEEK.
UPDATE
ISSUED AT 1236 PM MDT WED MAY 6 2026
NO NOTABLE CHANGES WITH THIS UPDATE. TODAY REMAINS ON THE COOL SIDE,
WITH HIGHS IN THE LOW-TO-MID 50S FOR MOST OF THE AREA. LOWS TONIGHT
SHOULD REMAIN ABOVE FREEZING FOR EAST OF DIVIDE LOCATIONS, EXCEPT IN
LOW-LYING AREAS WHERE NEAR 30 DEGREES IS POSSIBLE. A SHORTWAVE MOVES
THROUGH THE NORTHWEST FLOW TONIGHT, BRINGING SOME LIGHT RAIN SHOWERS
OR LIGHT MOUNTAIN SNOW SHOWERS TO NORTHERN WYOMING, SPREADING TO
CENTRAL AREAS THURSDAY MORNING AND AFTERNOON, WHEN AN ISOLATED
THUNDERSTORM IS ALSO POSSIBLE. OUTSIDE A QUICK SYSTEM SATURDAY, THE
WEEKEND LOOKS TO REMAIN MOSTLY DRY, WITH WARMING TEMPERATURES. EARLY
NEXT WEEK COULD SEE 80S ACROSS THE AREA.
DISCUSSION
ISSUED AT 200 AM MDT WED MAY 6 2026
IR CURRENTLY DEPICTS AMPLE CLOUD COVER ACROSS THE SOUTHERN HALF
OF THE CWA WITH IMPROVED CONDITIONS FURTHER NORTH. THE CLOSED
UPPER LEVEL LOW HAS EMBEDDED INTO THE OVERALL L/W TROUGH PATTERN
WITH A POSITIVE ORIENTED TILT ACROSS THE DAKOTAS TO THE ROCKIES
WITH THE PFJ DIPPING AROUND ITS BASE. A FEW SCATTERED SNOW
SHOWERS LINGER ACROSS MAINLY EASTWARD SWEETWATER COUNTY
EXTENDING FROM SOUTH PASS/SWEETWATER STATION BUT WILL SLOWLY
DIMINISH AS IT EXITS TO THE SOUTHEAST BY SUNRISE WEDNESDAY
MORNING. COLD TEMPERATURES IN THE HARD FREEZE WARNING CRITERIA
CATEGORY FOR WEDNESDAY MORNING FOR LOWER ELEVATIONS EAST OF THE
DIVIDE BEFORE RECOVERING TO SEASONABLE TEMPERATURES BY
AFTERNOON.
OTHERWISE, EXPECT UPPER LEVEL RIDGING TO START BUILDING IN LATER
WEDNESDAY, GIVING WAY TO NORTHWEST FLOW ALOFT AND AMPLE
CONVERGENCE. IMPROVED SKY CONDITIONS AND RELATIVELY LIGHT WINDS
THROUGH THE REST OF WEDNESDAY AND INTO THURSDAY. A SUBTLE
SHORTWAVE PROPAGATES DOWN THE RIDGE, BRINGING SOME SCATTERED
SHOWERS FOR NORTHEASTERN PORTIONS OF THE CWA, MAINLY FOR PARTS
OF THE BIGHORN BASIN AND MOUNTAINS BUT MINIMAL, IF ANY, IMPACTS
EXPECTED. THE PATTERN CONTINUES WITH NORTHWEST FLOW ALOFT WITH
THE PFJ REMAINING IN FAR REACHES OF THE NORTHEAST PART OF THE
STATE WITH ANOTHER SHORTWAVE EFFECTING THE NORTHEASTERN CWA
AGAIN SATURDAY AFTERNOON/EVENING. MINIMAL IMPACTS EXPECTED ONCE
AGAIN BUT THE OVERALL PATTERN LOOKS TO BE A MOSTLY DRY AND
WARMING TREND INTO THE WEEKEND AND NEXT WEEK. RIDGING AND
NORTHWEST FLOW ALOFT CONTINUE WITH NO SIGNIFICANT WEATHER
SYSTEMS OF NOTE ON THE HORIZON AT THIS POINT IN TIME.
AVIATION /18Z TAFS THROUGH 18Z THURSDAY/
ISSUED AT 1200 PM MDT WED MAY 6 2026
NORTHWEST FLOW HAS SET UP OVER THE AREA IN THE WAKE OF THE PREVIOUS
SYSTEM. THIS WILL LEAD TO PREVAILING VFR CONDITIONS AT TERMINALS,
THOUGH WITH OCCASIONAL SHOWERS DEVELOPING THROUGH THE PERIOD. THE
FIRST ROUND OF THIS ACTIVITY WILL COME AROUND SUNSET AT KJAC AND
THEN AT KCOD AROUND 06Z. SHOWERS WILL CONTINUE TO MOVE SOUTHEAST
THROUGH TONIGHT, IMPACTING THE KCPR AREA AROUND SUNRISE THURSDAY.
IMPACTS AT REMAINING TERMINALS ARE LESS CERTAIN AND HAVE OMITTED ANY
MENTION OF PRECIPITATION FOR NOW. OTHERWISE, A BROKEN CLOUD DECK
WILL MOVE IN FOR MOST TERMINALS TONIGHT.
PLEASE SEE THE AVIATION WEATHER CENTER AND/OR CWSU ZDV AND ZLC FOR
THE LATEST INFORMATION ON ICING AND TURBULENCE FORECASTS.
RIW WATCHES/WARNINGS/ADVISORIES
NONE.
UPDATE...WITTMANN
DISCUSSION...LOWE
AVIATION...MYERS
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