796
WWUS20 KWNS 272010
SEL3
SPC WW 272010
NEZ000-SDZ000-280300-
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 633
NWS STORM PREDICTION CENTER NORMAN OK
210 PM MDT THU AUG 27 2026
THE NWS STORM PREDICTION CENTER HAS ISSUED A
* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
NORTHWEST INTO CENTRAL NEBRASKA
SOUTHWEST SOUTH DAKOTA
* EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 210 PM UNTIL
900 PM MDT.
* PRIMARY THREATS INCLUDE...
SCATTERED DAMAGING WINDS AND ISOLATED SIGNIFICANT GUSTS TO 75
MPH POSSIBLE
SCATTERED LARGE HAIL AND ISOLATED VERY LARGE HAIL EVENTS TO 2.5
INCHES IN DIAMETER POSSIBLE
SUMMARY...THUNDERSTORM DEVELOPMENT IS ONGOING FROM SOUTHWEST SOUTH
DAKOTA INTO NORTH-CENTRAL NEBRASKA. THIS REGION IS CHARACTERIZED BY
VERY STRONG BUOYANCY AND STRONG VERTICAL SHEAR, WITH THE OVERALL
ENVIRONMENTAL CONDITIONS SUPPORTIVE OF SUPERCELLS. LARGE TO VERY
LARGE HAIL (UP TO 2.5" IN DIAMETER) IS THE PRIMARY THREAT INITIALLY,
WITH THE PRIMARY THREAT TRANSITIONING TO DAMAGING GUSTS AS STORMS
CLUSTER WITH TIME. SOME GUSTS UP TO 75 MPH ARE POSSIBLE.
THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 75
STATUTE MILES EAST AND WEST OF A LINE FROM 90 MILES NORTH NORTHEAST
OF CHADRON NE TO 20 MILES SOUTH OF MULLEN NE. FOR A COMPLETE
DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE
(WOUS64 KWNS WOU3).
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 630...WW 631...WW 632...
AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO
2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 65 KNOTS. A
FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR
30020.
...MOSIER
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