707
FXUS63 KBIS 312353
AFDBIS
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BISMARCK ND
653 PM CDT SAT MAY 31 2025
KEY MESSAGES
- WARM AND MAINLY DRY CONDITIONS EXPECTED THROUGH THE WEEKEND,
WITH WIDESPREAD HIGHS IN THE UPPER 70S AND 80S.
- SMOKE ALOFT WILL CONTINUE THROUGH TOMORROW, WITH WIDESPREAD
SMOKE AT THE SURFACE.
- A SYSTEM WILL BRING SHOWERS AND THUNDERSTORMS TO THE AREA
SUNDAY NIGHT THROUGH MONDAY NIGHT. STRONG TO SEVERE STORMS
SHOULD REMAIN SOUTH AND EAST OF THE FORECAST AREA.
- COOLER TEMPERATURES IN THE 60S AND 70S ARE THEN EXPECTED
THROUGH THE REMAINDER OF THE WORK WEEK WITH HIT AND MISS
SHOWERS AND A FEW THUNDERSTORMS.
UPDATE
ISSUED AT 643 PM CDT SAT MAY 31 2025
OVERALL THE FORECAST REMAINS IN GOOD SHAPE. MAIN IMPACT IS THE
SMOKE FROM CANADIAN WILDFIRES ACROSS THE REGION CONTINUING TO
MOVE IN WITH A WEAK NORTHERLY FLOW ALOFT. VISIBILITY DUE TO THE
SMOKE ROUGHLY RANGES FROM 2-4 MILES OVERALL, WITH OCCASIONAL 1
MILE OR A BIT LESS AT TIMES. AS LOW/MID LEVEL FLOW BECOMES
WEST/SOUTHWEST TONIGHT INTO SUNDAY, SMOKE SHOULD ERODE/DISSIPATE
SOME FROM WEST INTO CENTRAL. HOWEVER, ANOTHER FRONTAL BOUNDARY
PUSHING SOUTHEAST INTO THE REGION LOOKS TO BRING ANOTHER SWATH
OF CANADIAN WILDFIRE SMOKE INTO OUR REGION SUNDAY NIGHT.
DISCUSSION
ISSUED AT 240 PM CDT SAT MAY 31 2025
AN UPPER-LEVEL RIDGE CONTINUES TO MOVE ACROSS THE HIGH PLAINS
TODAY LEADING TO INCREASED TEMPERATURES ACROSS THE HIGH PLAINS
AND NORTHERN PLAINS. HOWEVER THICK SMOKE ALOFT OVER THE
NORTHERN PLAINS IF PREVENTING TEMPERATURES FROM WARMING INTO THE
UPPER 80S TODAY. WIDESPREAD SMOKE IS FORECAST TO LINGER ACROSS
THE STATE TODAY THROUGH MUCH OF SUNDAY. VISIBILITY REDUCTIONS
DOWN TO 1 MILE HAVE BEEN OBSERVED IN ACROSS THE STATE TODAY AS
THICK SURFACE SMOKE STREAMS IN FROM SASKATCHEWAN. OVERNIGHT LOW
TEMPERATURES ARE FORECAST TO REMAIN IN THE 50S.
SMOKE IF FORECAST TO BEGIN TO LEAVE THE WESTERN HALF OF THE
STATE SUNDAY AS NORTH DAKOTA BEGINS TO GET ON THE WESTERN SIDE
OF THE RIDGE LEADING TO SOUTHWESTERLY FLOW ALOFT. IN ADDITION
SOUTHERLY WINDS WILL BEGIN TO TRANSPORT CLEAR AIR FROM THE
CENTRAL AND SOUTHERN PLAINS. SUNDAY IS ALSO FORECAST TO BE THE
WARMEST DAY AS THE RIDGE AXIS STRENGTHENS ACROSS THE NORTHERN
PLAINS. TEMPERATURES ARE FORECAST TO WARM INTO THE 80S TO LOWER
90S. SHOWERS AND THUNDERSTORMS ARE POSSIBLE SUNDAY EVENING FOR
WESTERN NORTH DAKOTA AND OVERNIGHT FOR CENTRAL NORTH DAKOTA AS
AN UPPER-LEVEL SYSTEM DIGS ACROSS THE REGION. A COLD FRONT WILL
INITIATE SHOWERS AND SOME THUNDERSTORMS AS THE FRONT PASSES
THROUGH THE STATE. THERE IS A CHANCES FOR ISOLATED AREAS IN THE
NORTHWEST TO SEE UP TO HALF AN INCH OF RAIN FROM CONVECTIVE
STORMS.
THE UPPER-LEVEL PATTERN WILL BEGIN TO TRANSITION SUNDAY INTO
MONDAY AS THE UPPER-LEVEL RIDGES FLATTENS AND A BROAD TROUGH
DIGS ACROSS THE NORTHERN PLAINS. SEVERE WEATHER CHANCES MONDAY
HAVE SHIFTED FURTHER TO THE SOUTHEAST INTO SOUTH DAKOTA AND
MINNESOTA. MAJORITY OF THE INSTABILITY WILL BE TO OUR SOUTHEAST.
HOWEVER, THERE IS SOME ELEVATED CAPE AND ABUNDANT SHEAR WHICH
COULD LEAD TO A STRONGER POST FRONTAL THUNDERSTORM IN THE JAMES
RIVER VALLEY. PRECIPITATION AMOUNTS CONTINUE TO DIMINISH ACROSS
CENTRAL NORTH DAKOTA WHILE THE MAJORITY OF THE PRECIPITATION
REMAINS FAVORED ACROSS NORTHEASTERN SOUTH DAKOTA INTO MINNESOTA.
HOWEVER, THERE IS A CHANCE FOR ISOLATED AREAS ACROSS CENTRAL
AND EASTERN NORTH DAKOTA TO SEE UP TO A QUARTER INCH OF RAIN.
THIS BROAD TROUGH WILL BRING COOLER TEMPERATURES AND CHANCES OF
PRECIPITATION THROUGH THE MIDDLE OF NEXT WEEK.
AVIATION /00Z TAFS THROUGH 00Z MONDAY/
ISSUED AT 643 PM CDT SAT MAY 31 2025
SMOKE/FU CONTINUES TO RESULT IN WIDESPREAD VISIBILITY
REDUCTIONS ACROSS NORTH DAKOTA. FU WILL CONTINUE TO RESULT IN
LOW VISIBILITY REDUCTIONS TONIGHT INTO THE EARLY MORNING HOURS
TOMORROW. TERMINALS CONTINUE TO REPORT LOW CLOUDS AROUND 2000FT
TO 3500FT, HOWEVER THIS IS A RELIC FROM THE SMOKE AND NOT A TRUE
CEILING. FU IS FORECAST TO START CLEARING OUT OF THE WEST FIRST
TOMORROW MAINLY IMPACT KDIK AND KXWA. CENTRAL NORTH DAKOTA
MIGHT HAVE TO WAIT FOR SUNDAY AFTERNOON AND EVENING TO CLEAR.
WINDS ARE FORECAST TO REMAIN OUT OF THE NORTHWEST EARLY THIS
PERIOD, SWITCHING TO SOUTHWESTERLY TONIGHT/TOMORROW.
BIS WATCHES/WARNINGS/ADVISORIES
NONE.
UPDATE...NH
DISCUSSION...JOHNSON
AVIATION...NH
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