878  
FXUS63 KABR 080658  
AFDABR  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE ABERDEEN SD  
158 AM CDT FRI AUG 8 2025  
   
KEY MESSAGES  
 
- TWO SCENARIOS FOR TODAY. WARM AIR ALOFT KEEPS US CAPPED. THE OTHER  
OPTION, IF WE GET CONVECTION, IS FOR EITHER AN ISOLATED STORM  
THROUGH DURING THE MORNING HOURS ALONG THE SD/ND STATE LINE, OR A  
STRONGER STORM OR TWO LATE AFTERNOON/EVENING (30-45%) MAINLY IN FAR  
NORTHEASTERN SD/WEST CENTRAL MN.  
 
- THERE IS A SLIGHT RISK (LEVEL 2 OUT OF 5) FOR HIGHWAY 281 AND  
POINTS EAST. MARGINAL RISK (1 OF 5) ELSEWHERE. HAIL/HIGH WINDS ARE  
THE PRIMARY THREAT. ISOLATED TORNADO RISK IS FOCUSED IN WESTERN  
MINNESOTA.  
 
 
   
DISCUSSION  
 
ISSUED AT 157 AM CDT FRI AUG 8 2025  
 
A LINE OF STORMS HAVE SET UP FROM HETTINGER ALL THE WAY NORTHEAST TO  
DEVILS LAKE PROCEEDING TO THE EAST. THE SOUTH END OF THIS LINE IS  
ENCOUNTERING VERY WARM AIR LOFT, WITH 700 TEMPERATURES RUNNING AT  
APPROXIMATELY 15 TO 16 CELSIUS. THAT IS BETWEEN ONE TO TWO STANDARD  
DEVIATIONS ABOVE CLIMATOLOGY. THIS STRONG CAP IS SITUATED ABOVE A  
LAYER OF STRATUS. THUS THE MAIN CONCERN GOING FORWARD IS THE IMPACT  
OF THESE STABLE BOUNDARY LAYER CONDITIONS ON FUTURE CONVECTIVE  
INITIATION. CONVECTIVE ALLOWING MODELS SEEM TO HAVE A VERY GOOD  
GRASP OF THESE CONDITIONS AND ARE LIMITING CONVECTION ACROSS MUCH OF  
THE CWA THROUGH THE COURSE OF THE LATE MORNING AND INTO THE  
AFTERNOON HOURS, WITH A FEW INDICATING CELLS PENETRATING INTO SOUTH  
DAKOTA BEFORE DISSIPATING. THERE ARE SOME HINTS IN THESE CONVECTIVE  
ALLOWING MODELS THAT SOME OF THE BETTER CHANCES FOR ELEVATED  
CONVECTION SETS UP ACROSS THE FAR NORTHEAST LATER THIS MORNING AHEAD  
OF THE WARMEST AIR ALOFT. A SURFACE BOUNDARY WILL THEN PROVIDE THE  
FOCUS FOR RE-DEVELOPMANT AS IT MOVES ACROSS THE AREA THROUGH THE  
DAYLIGHT HOURS AND JUDGING BY BUFKIT PROFILES WE HAVE A VERY TENUOUS  
ABILITY TO BREACH THE CAP WITH THIS FEATURE ON OUR NORTHERN  
PERIPHERY. THAT SAID STEEP LAPSE RATES ALOFT WILL ENHANCE THE SEVERE  
WEATHER POTENTIAL FOR ANY STORMS THAT DO MANAGE, WITH NAM/HREF  
MLCAPE > 4000J/KG... BUT IF WE LOOK AT BUFKIT THIS WOULD PROBABLY BE  
CLOSER TO 3000-35000J/KG ELEVATED CAPE SINCE ITS GENERATED FROM THE  
TOP OF THE INVERSION WITH THE PASSAGE OF THE BOUNDARY. SHEAR IS  
QUITE GOOD FOR SEVERE WEATHER AS WELL, AT ABOUT 40KTS WITH STRONG  
MID-LEVEL SOUTHWESTERLIES THIS EVENING. OVERNIGHT WITH WARM  
ADVECTION AND ENHANCING LOW LEVEL FLOW WITH DECOUPLING, ELEVATED  
CONVECTION COULD GET GOING IN THE FAR NORTHEAST AND WESTERN  
MINNESOTA PRIOR TO MIDNIGHT BEFORE MOVING OUT OF THE CWA.  
 
ONCE THE FRONT MOVES THROUGH WE'LL SEE COLD AIR ADVECTION TONIGHT  
WITH THE CORE OF COLDEST AIR ALOFT MOVING THROUGH SUNDAY. THE HRRR  
AND RUC CURRENTLY DO NOT RUN FAR ENOUGH, HOWEVER SMOKE ALOFT AND  
NEAR SURFACE SITUATED JUST WEST OF THE AREA BY THE END OF THESE RUNS  
WILL BE A CONCERN FOR THE WEEKEND AND INTO NEXT WEEK AS THE SOURCE  
REGION IS OUT OF CANADA. THE NORTHWEST FLOW REGIME DEGRADES ON  
TUESDAY WITH A ZONAL/WOBBLY PATTERN FOR THE REST OF THE EXTENDED.  
ITS ABOUT THAT TIME OF YEAR WHERE THIS FETCH WOULD GENERATE LESS  
CONVECTIVE ACTIVITY AND AS SUCH NBM POPS ARE TOO LOW FOR A MENTION  
OF STORMS UNTIL WE GET INTO LATE IN THE WORK WEEK.  
 
 
   
AVIATION /06Z TAFS THROUGH 06Z FRIDAY/  
 
ISSUED AT 1218 AM CDT FRI AUG 8 2025  
 
TERMINALS KABR,KATY,KPIR,KMBG  
 
MVFR CIGS IN KABR/KATY WILL PERSIST, AND DEVELOP INTO KMBG  
THROUGH THE EARLY MORNING HOURS. CIGS MAY DROP TO IFR AT SOME  
POINT IN THE MORNING FOR KABR/KATY TERMINALS AS WELL. OTHERWISE,  
TRACKING CONVECTION UP IN NORTH DAKOTA CURRENTLY COULD IMPACT THE  
KMBG TERMINAL BUT NOT A HIGH ENOUGH PROBABILITY OF OCCURRENCE FOR  
INCLUDING IN KABR TAF. LATER THIS AFTERNOON, CONVECTIVE  
REDEVELOPMENT IS MORE PROBABLE FOR KABR/KATY. WILL ALSO SEE A WIND  
SHIFT FROM SE/E TO NW WITH THE PASSAGE OF A FRONT THROUGH THE  
AFTERNOON/EVENING.  
 
 
   
ABR WATCHES/WARNINGS/ADVISORIES  
 
SD...NONE.  
MN...NONE.  
 
 
 
 
DISCUSSION...07  
AVIATION...07  
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