Tornado Watch 428

Issued

Jun 7, 2005, 2:45 PM MDT (20:45 UTC)

Expired

Jun 7, 2005, 11:00 PM MDT

In force

8 hr

Issued by

the Storm Prediction Center

Counties Box Butte County, NE, Cherry County, NE, Dawes County, NE, Sheridan County, NE, Sioux County, NE, Bennett County, SD, Custer County, SD, Fall River County, SD, Haakon County, SD, Hughes County, SD, Jackson County, SD, Jones County, SD, Mellette County, SD, Oglala Lakota County, SD, Pennington County, SD, Stanley County, SD, Sully County, SD, Todd County, SD

The Rapid City radar (KUDX), 65 km from the middle of the area, began a volume at 20:45 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.

• Mesoscale Discussion 1225Jun 7, 1:53 PM MDT
• Mesoscale Discussion 1231Jun 7, 6:14 PM MDT

000 
WWUS20 KWNS 072047
SEL8  
SPC WW 072047
NEZ000-SDZ000-080500-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 428
NWS STORM PREDICTION CENTER NORMAN OK
345 PM CDT TUE JUN 7 2005

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

       NORTH CENTRAL NEBRASKA AND THE NRN PANHANDLE
       SOUTHWEST AND CENTRAL SOUTH DAKOTA

EFFECTIVE THIS TUESDAY AFTERNOON FROM 345 PM UNTIL MIDNIGHT CDT.

TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 75 STATUTE MILES
NORTH AND SOUTH OF A LINE FROM 55 MILES WEST NORTHWEST OF CHADRON
NEBRASKA TO 45 MILES SOUTH SOUTHEAST OF PIERRE SOUTH DAKOTA.  FOR
A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU8).

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.

OTHER WATCH INFORMATION...CONTINUE...WW 425...WW 426...WW 427...

DISCUSSION...AIR MASS CONTINUES TO RAPIDLY DESTABILIZE AS SURFACE
CYCLOGENESIS OCCURS OVER THE SRN NEB PANHANDLE.  CURRENT INDICATIONS
ARE THAT MLCAPE IS BETWEEN 1500 AND 2500 J/KG WITH DEEP LAYER SHEAR
UPSTREAM OVER WY NOW BETWEEN 50 AND 55 KTS.  SURFACE ANALYSIS SHOWS
WARM FRONTAL BOUNDARY EXTENDING NEWD FROM THE NRN NEB PANHANDLE INTO
E CENTRAL SD WITH SURFACE DRYLINE EXTENDING SWD FROM THE CENTRAL NEB
PANHANDLE INTO WRN KS. VSB SATELLITE ALSO SHOWS CIRRUS ASSOCIATED
WITH UPPER LEVEL JET STREAK NOW ACROSS SRN UT INTO W CENTRAL CO
WHICH WILL CONTINUE TO ENHANCE SHEAR AND UVVS IN THE NEXT FEW HOURS
TO SUPPORT SUPERCELLS ACROSS THE AREA. INCREASED SHEAR AND
INSTABILITY INDICATES A FEW TORNADOES WITH LARGE HAIL AS MAIN
THREAT.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550.
MEAN STORM MOTION VECTOR 23035.


...MCCARTHY

441,1040 445,0995 424,0995 420,1040

Tornado Watches in South Dakota, 2005Tornado Watches in Nebraska, 2005Every tornado watch in 2005

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.