Tornado Watch 626

Issued

Jul 25, 2001, 2:45 PM MDT (20:45 UTC)

Expired

Jul 25, 2001, 9:00 PM MDT

In force

6 hr

Issued by

the Storm Prediction Center

Counties Bennett County, SD, Custer County, SD, Fall River County, SD, Haakon County, SD, Jackson County, SD, Jones County, SD, Lawrence County, SD, Meade County, SD, Mellette County, SD, Oglala Lakota County, SD, Pennington County, SD, Stanley County, SD, Todd County, SD

The Rapid City radar (KUDX), 15 km from the middle of the area, began a volume at 20:46 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

619 
WWUS9 KMKC 252032
SEL6  
MKC WW 252022
SDZ000-260300-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 626
STORM PREDICTION CENTER NORMAN OK
222 PM MDT WED JUL 25 2001

THE STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

SOUTHWEST SOUTH DAKOTA                       

EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 245 PM UNTIL
900 PM MDT.

TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 55 STATUTE MILES NORTH AND
SOUTH OF A LINE FROM 45 MILES WEST OF RAPID CITY SOUTH DAKOTA TO 50
MILES EAST SOUTHEAST OF PHILIP SOUTH DAKOTA.

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND 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.


DISCUSSION...THUNDERSTORMS ARE EXPECTED TO DEVELOP IN THE NEXT HOUR
AND MOVE SLOWLY EWD ALONG AND OUTFLOW BOUNDARY FROM S OF PHP TO
NEAR RAP...AS WELL AS WHERE THE OUTFLOW BOUNDARY INTERSECTS THE
BLACK HILLS. 18Z RAP SOUNDING SHOWED LARGE SURFACE-BASED CAPE AND
VERY STEEP MID LEVEL LAPSE RATES...WHILE VWP OBSERVATIONS SHOW A
FAVORABLE SHEAR PROFILE FOR SUPERCELLS.  IN ADDITION TO THE THREAT
OF VERY LARGE HAIL AND DAMAGING WINDS...STRONG LOW-LEVEL SHEAR AND
LOW LCL HEIGHTS COULD SUPPORT A COUPLE OF TORNADOES ALONG AND
IMMEDIATELY N OF THE BOUNDARY.


AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3 INCHES.  EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. 
MEAN STORM MOTION VECTOR 28015.


...THOMPSON

445,1035 443,1004 425,1004 431,1035

Tornado Watches in South Dakota, 2001Every tornado watch in 2001

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.