732
FXUS63 KABR 291823
AFDABR
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE ABERDEEN SD
123 PM CDT MON JUN 29 2026
KEY MESSAGES
- A HEAT ADVISORY REMAINS IN EFFECT THROUGH EARLY THIS EVENING
ACROSS FAR NORTHEAST SOUTH DAKOTA AND WEST CENTRAL MINNESOTA
FOR HEAT INDEX TEMPERATURES IN THE 100F TO 107F DEGREE RANGE.
- THERE IS A SLIGHT (2 OF 5) TO MARGINAL RISK (1 OF 5) FOR
SEVERE WEATHER THIS AFTERNOON INTO THIS EVENING ACROSS NORTH
PORTIONS OF CENTRAL AND NORTHEAST SOUTH DAKOTA AND WEST
CENTRAL MINNESOTA, AS WELL AS A PORTION OF CENTRAL SOUTH
DAKOTA. MAIN HAZARDS ARE THUNDERSTORM WIND GUSTS UP TO 75 MPH
AND 1-2IN HAIL. ADDITIONALLY, THE DEVELOPMENT OF A TORNADO OR
TWO CANNOT BE RULED OUT.
- THERE IS A MARGINAL RISK (1 OF 5) FOR SEVERE WEATHER LATE
TUESDAY NIGHT THROUGH THE DAY WEDNESDAY ACROSS PORTIONS OF
CENTRAL AND NORTHEAST SOUTH DAKOTA AND WEST CENTRAL MINNESOTA.
MAIN HAZARDS ARE LARGE HAIL UP TO 1 INCH IN DIAMETER AND WIND
GUSTS OF 60 MPH.
- WESTERN U.S. WILDFIRE SMOKE (ALOFT) WILL BE OVER THE REGION
THROUGH WEDNESDAY; POTENTIALLY LONGER DEPENDING ON HOW
STEERING FLOW WINDS EVOLVE THIS WEEK. SOME MINOR
CONCENTRATIONS OF NEAR SURFACE SMOKE COULD HAPPEN LATE TUESDAY
NIGHT INTO THE DAY ON WEDNESDAY.
- ABOVE NORMAL TEMPERATURES ARE EXPECTED TO PERSIST FOR MOST OF
THIS WEEK. WITH HIGHS IN THE MID 80S TO MID 90S AND DEWPOINTS
WELL INTO THE 60S, AND EVEN 70S FOR SOME LOCATIONS,
ESPECIALLY FROM THURSDAY ONWARD, HEAT-RELATED ILLNESSES BECOME
A CONCERN.
DISCUSSION
ISSUED AT 121 PM CDT MON JUN 29 2026
AT 1 PM CDT, SKIES ARE SMOKY AND PARTLY CLOUDY. TEMPERATURES ARE
WARMING THROUGH THE 70S AND 80S. HEAT INDEX VALUES ARE BEGINNING TO
RESPOND TO THE COMBINATION OF WARMING TEMPERATURES AND DEWPOINTS IN
THE 70S; WITH READINGS RISING INTO THE MID TO UPPER 90S. THE HEAT
ADVISORY CONTINUES. WINDS HAVE A SOUTHEAST COMPONENT THIS AFTERNOON,
GENERALLY 10 TO 20 MPH WITH SOME OCCASIONAL GUSTS UP TO 30 MPH. A
FRONTAL BOUNDARY IS POSITIONED EAST OF THE MISSOURI RIVER VALLEY,
SLOWLY WORKING ITS WAY EAST. THIS IS THE FOCUSING MECHANISM FOR A
POTENTIAL NEXT ROUND OF THUNDERSTORMS BY LATE THIS AFTERNOON/EARLY
THIS EVENING.
IF CONVECTION INITIATES IN THE EASTERN PART OF THIS CWA BEFORE
PUSHING OFF INTO MINNESOTA, LARGE HAIL AND DAMAGING WINDS WOULD BE
THE PRIMARY CONCERNS. LOW LEVEL SHEAR AND CAPE APPEARS TO ACTIVATE
ACROSS THE FAR EASTERN FORECAST ZONES, AS WELL, AOA 22Z TODAY. THIS
WOULD TEND TO INCREASE THE RISK OF A TORNADO OR TWO WITH ANY STORMS
THAT FORM. HOWEVER, WITH WARM MID-LEVEL (700HPA) TEMPERATURES
BETWEEN +12C AND +15C POSITIONED ACROSS THE EASTERN HALF OF THE CWA
LATE THIS AFTERNOON THROUGH LATE THIS EVENING, THUNDERSTORMS ARE NOT
LIKELY TO DEVELOP (CAPPING TOO STRONG). THIS BOUNDARY IS MODELED TO
SAG SOUTH INTO NEBRASKA ON TUESDAY AND STALL OUT. MODEL PROGS THEN
SHOW IT WORKING BACK NORTHWARD INTO THE CWA LATE TUESDAY NIGHT INTO
WEDNESDAY MORNING AS A WARM FRONT. EXPECTING THIS COULD BE THE NEXT
CHANCE FOR SHOWERS AND THUNDERSTORMS (MID-LEVEL WAA COUPLED WITH LOW
LEVEL MOISTURE ADVECTION, A WARM-FRONTAL ZONE OF ASCENT AND PERHAPS
EVEN SOME ENERGY ALOFT).
AFTER THAT, THE FORECAST SHOULD BE DRY UNTIL THURSDAY AFTERNOON WHEN
THE NEXT POTENTIAL ROUND OF STORMS COULD GET GOING. CURRENT MODEL
TIMING HAS SHORTWAVE ENERGY ENTERING THE REGION BOTH THURSDAY AND
FRIDAY, SO BOTH OF THESE AFTERNOONS/EVENINGS COULD HAVE SOME STRONG
THUNDERSTORMS TO DEAL WITH. IT'S NOT CLEAR WHETHER AN ADDITIONAL
ROUND OF STORMS COULD BE PUTTING A DENT IN 4TH OF JULY PLANS
SATURDAY AFTERNOON/EVENING, BUT THERE ARE POPS (~20-40%) IN THE
FORECAST FOR FRIDAY AFTERNOON/EVENING.
THINGS SHOULD DRY OUT AFTER THAT FOR SUNDAY AND MONDAY WHEN THE
UPPER RIDGE EAST OF HERE SLOSHES BACK TO THE WEST. CLUSTER ANALYSIS
SHOWS THIS WELL. IN FACT, CLUSTERS ANALYSIS WOULD HAVE ONE BELIEVING
THAT THE UPPER RIDGE WILL SLOSH BACK TO THE EAST AT SOME POINT
DURING THAT FIRST FULL WEEK OF JULY. HOW WARM/UNCOMFORTABLE IT GETS
OUTSIDE IS TIED TO THE STRENGTH/POSITION OF THIS UPPER RIDGE, WHICH
IS NOT SHOWN TO BE ALL THAT STRONG JUST NOW FOR THE WEEKEND INTO
NEXT WEEK. PRESENTLY, THURSDAY AND FRIDAY MAY BE THE ONLY DAYS THAT
SEE THE TEMPERATURE WARM TO 90 OR ABOVE. HEAT INDEX VALUES FROM
TUESDAY ONWARD DO NOT APPEAR TO BE ALL THAT MUCH OF A CONCERN AT THE
MOMENT.
THE LATEST HRRR OUTPUT SHOWS THIS SMOKE ALOFT NEVER REALLY GOING
AWAY. NOT PUTTING TOO MUCH WEIGHT ON ITS OUTPUT LATE IN THE PERIOD,
BUT IT DOES PROG BOTH NEAR SURFACE SMOKE AND SMOKE ALOFT TO CORK-
SCREW AROUND AND START INTO THIS REGION FROM THE NORTHWEST, AS WELL
AS FROM THE SOUTHWEST, BY WEDNESDAY MORNING. IF THE CONCENTRATIONS
OF NEAR SURFACE SMOKE BEING GENERATED IN THE 12Z HRRR RUN END UP
PANNING OUT, SOME VISBY RESTRICTION AND AIR-QUALITY/HEALTH CONCERNS
MAY START POPPING UP.
AVIATION /18Z TAFS THROUGH 18Z TUESDAY/
ISSUED AT 1226 PM CDT MON JUN 29 2026
TERMINALS KABR,KATY,KPIR,KMBG
A MIX OF VFR/MVFR CIGS RIGHT NOW FOR KPIR/KABR/KATY/KMBG IS
FORECAST TO BECOME ALL VFR BY MID-AFTERNOON. MONITORING A
FRONTAL BOUNDARY STUCK BACK ALONG THE MISSOURI RIVER VALLEY
(KPIR/KMBG) RIGHT NOW. IT IS FORECAST TO MOVE EAST INTO
MINNESOTA THROUGH MID-EVENING, TURNING WINDS FROM THE SOUTHEAST
TO THE WEST OR SOUTHWEST. THIS BOUNDARY COULD BE THE FOCUS FOR
THUNDERSTORM RE-DEVELOPMENT LATE THIS AFTERNOON THROUGH LATE
THIS EVENING MAINLY ACROSS NORTHEAST SOUTH DAKOTA (KABR/KATY)
INTO WEST CENTRAL MINNESOTA. THUNDERSTORM WIND GUSTS OF 60-75MPH
AND 1-2IN DIAMETER HAIL ARE THE PRIMARY THREATS.
ABR WATCHES/WARNINGS/ADVISORIES
SD...HEAT ADVISORY UNTIL 8 PM CDT THIS EVENING FOR SDZ008-020>023.
MN...HEAT ADVISORY UNTIL 8 PM CDT THIS EVENING FOR MNZ039-046.
DISCUSSION...10
AVIATION...10
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page