Tornado Watch 599

Issued

Jul 20, 2001, 5:30 PM MDT (23:30 UTC)

Expired

Jul 20, 2001, 11:00 PM MDT

In force

6 hr

Issued by

the Storm Prediction Center

The Glasgow radar (KGGW), 165 km from the middle of the area, began a volume at 23:31 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.

677 
WWUS9 KMKC 202315
SEL9  
MKC WW 202306
MTZ000-NDZ000-210500-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 599
STORM PREDICTION CENTER NORMAN OK
506 PM MDT FRI JUL 20 2001

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

   NORTHEAST MONTANA                            
   WESTERN NORTH DAKOTA                       

EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 530 PM UNTIL 1100
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 170 STATUTE MILES EAST AND WEST
OF A LINE FROM 30 MILES EAST OF GLENDIVE MONTANA TO 65 MILES NORTH
NORTHEAST OF WILLISTON NORTH 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.

OTHER WATCH INFORMATION...THIS TORNADO WATCH REPLACES TORNADO WATCH
NUMBER 596.  WATCH NUMBER 596 WILL NOT BE IN EFFECT AFTER 530 PM
MDT.  CONTINUE...WW 597...WW 598...

DISCUSSION...CONDITIONS EXPECTED TO REMAIN FAVORABLE FOR TORNADIC 
SUPERCELLS OVER NE MT/WRN ND THIS EVENING AS LARGE SCALE ASCENT
AHEAD OF ERN WY/SE MT UPPER IMPULSE AND SURFACE HEATING FURTHER
DESTABILIZE REGION.  THE MOST FAVORABLE LOW LEVEL VEERING WILL
CONTINUE TO EXIST ALONG BOUNDARY STALLED W/E FROM NEAR JDN TO GDV
TO S OF MOT.  NEW STORMS MAY INITIATE ALONG THIS BOUNDARY IN THE
NEXT HOUR OR TWO S OF ISN. 

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 26030.

...CORFIDI

485,0991 470,1003 470,1074 485,1064

Tornado Watches in North Dakota, 2001Tornado Watches in Montana, 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.