Severe Thunderstorm Watch 680

Issued

Aug 11, 2000, 9:45 PM CDT (02:45 UTC)

Expired

Aug 12, 2000, 2:00 AM CDT

In force

4 hr

Issued by

the Storm Prediction Center

942 
WWUS9 KMKC 120219
SEL0  

SEL0  
MKC WW 120212
NDZ000-120700-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 680
STORM PREDICTION CENTER NORMAN OK
912 PM CDT FRI AUG 11 2000

THE STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

   CENTRAL AND EASTERN NORTH DAKOTA                       

EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 945 PM UNTIL
200 AM CDT.

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

THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 65 STATUTE MILES
NORTH AND SOUTH OF A LINE FROM 25 MILES NORTHWEST OF ROSEGLEN NORTH
DAKOTA TO 5 MILES NORTHEAST OF GRAND FORKS NORTH DAKOTA.

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.

OTHER WATCH INFORMATION...  CONTINUE...WW 679...

DISCUSSION...LINE OF SEVERE THUNDERSTORMS IS DEVELOPING OVER WRN ND
AS CONVECTION INTENSIFIES NORTH OF FORMER BOW ECHO IN DUNN COUNTY
ND.  STORMS ARE EXPECTED TO MOVE INTO INCREASINGLY MOIST AND
UNSTABLE ENVIRONMENT OVER CENTRAL/ERN ND WHERE SURFACE DEW POINTS
ARE NEAR 70F AND MUCAPE ABOVE 4000 J/KG.  SEVERE THREAT SHOULD
CONTINUE INTO THE OVERNIGHT HOURS AS MID LEVEL JET STREAK MOVES
ACROSS NRN ND AND LOW LEVEL JET STRENGTHENS OVER THE ERN
DAKOTAS...PROVIDING SUFFICIENT VERTICAL SHEAR FOR ORGANIZED SEVERE
STORMS.  


AVIATION...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 25040.


...WEISS

485,1021 485,0970 470,0970 470,1021

Severe Thunderstorm Watches in North Dakota, 2000Every severe thunderstorm watch in 2000

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.