678
WWUS20 KWNS 110046
SEL2
SPC WW 110046
SDZ000-110800-
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 562
NWS STORM PREDICTION CENTER NORMAN OK
645 PM MDT MON AUG 10 2026
THE NWS STORM PREDICTION CENTER HAS ISSUED A
* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
WESTERN INTO CENTRAL SOUTH DAKOTA
* EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 645 PM
UNTIL 200 AM MDT.
* PRIMARY THREATS INCLUDE...
SCATTERED DAMAGING WINDS AND ISOLATED SIGNIFICANT GUSTS TO 75
MPH LIKELY
SCATTERED LARGE HAIL AND ISOLATED VERY LARGE HAIL EVENTS TO 2
INCHES IN DIAMETER LIKELY
A TORNADO OR TWO POSSIBLE
SUMMARY...ONGOING SUPERCELLS ACROSS FAR SOUTHWEST NORTH DAKOTA ARE
EXPECTED TO PROGRESS SOUTHEASTWARD INTO NORTHWEST SOUTH DAKOTA SOON.
THE AIRMASS ACROSS SOUTH DAKOTA IS VERY UNSTABLE AND STRONGLY
SHEARED, SUGGESTING THESE SUPERCELLS WILL MAINTAIN THEIR INTENSITY.
UPSCALE GROWTH OF THESE STORMS IS POSSIBLE, WITH THE RESULTING
CONVECTIVE LINE THEN TRACKING SOUTHEASTWARD INTO MORE OF CENTRAL
SOUTH DAKOTA. IF THIS CONVECTIVE LINE IS REALIZED, ENVIRONMENTAL
CONDITIONAL SUPPORT THE POTENTIAL FOR STRONG TO SEVERE GUST (I.E.
75+ MPH). ADDITIONALLY, STRONG LOW-LEVEL SHEAR WILL DEVELOP ACROSS
CENTRAL SOUTH DAKOTA SO THERE IS RISK FOR A LINE-EMBEDDED TORNADO OR
TWO, IF A MATURE CONVECTIVE LINE MATERIALIZES.
THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 95
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 55 MILES SOUTHWEST OF
LEMMON SD TO 40 MILES EAST OF PIERRE SD. FOR A COMPLETE DEPICTION OF
THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS
WOU2).
PRECAUTIONARY/PREPAREDNESS ACTIONS...
REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA.
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
TORNADOES.
OTHER WATCH INFORMATION...CONTINUE...WW 558...WW 559...WW
560...WW 561...
AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO
2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 65 KNOTS. A
FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR
30035.
...MOSIER
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