Tornado Watch 408

Issued

Jun 12, 2001, 2:00 PM MDT (20:00 UTC)

Expired

Jun 12, 2001, 8:00 PM MDT

In force

6 hr

Issued by

the Storm Prediction Center

The Rapid City radar (KUDX), 105 km from the middle of the area, began a volume at 20:02 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.

000 
WWUS9 KMKC 121945
SEL8  

SEL8  
MKC WW 121938
MTZ000-NEZ000-SDZ000-WYZ000-130200-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 408
STORM PREDICTION CENTER NORMAN OK
138 PM MDT TUE JUN 12 2001

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

   SOUTHEAST MONTANA                            
   THE NEBRASKA PANHANDLE                           
   WESTERN SOUTH DAKOTA                       
   EASTERN WYOMING                            

EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 200 PM UNTIL 800
PM MDT.

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 ALONG AND 65 STATUTE MILES EAST AND WEST
OF A LINE FROM 40 MILES NORTHEAST OF BROADUS MONTANA TO 40 MILES
WEST OF SIDNEY NEBRASKA.

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 406...WW 407...

DISCUSSION...THUNDERSTORMS ARE INCREASING OVER THE HIGHER TERRAIN
OF ERN WY IN ADVANCE OF UPPER TROUGH DIGGING ACROSS THE NWRN
STATES.  VERTICAL WIND PROFILES EXHIBIT STRONG VEERING WITH
HEIGHT...AND WHEN COUPLED WITH 40-50 KT SWLY FLOW IN THE MID LEVELS
ARE RESULTING IN STRONG VERTICAL SHEAR.  AIR MASS IS MODERATELY
UNSTABLE WITH MLCAPE OF 2500 J/KG.  SEVERE STORMS...INCLUDING THE
THREAT FOR TORNADIC SUPERCELLS...ARE EXPECTED TO SPREAD ENEWD
ACROSS THE HIGH PLAINS THIS AFTERNOON AND EVENING.


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 500. 
MEAN STORM MOTION VECTOR 22035.


...WEISS

;454,1032 410,1023 410,1050 454,1060;

Tornado Watches in Nebraska, 2001Tornado Watches in Wyoming, 2001Tornado 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.