Severe Thunderstorm Watch 607

Issued

Jul 11, 2004, 6:20 PM MDT (00:20 UTC)

Expired

Jul 12, 2004, 2:00 AM MDT

In force

8 hr

Issued by

the Storm Prediction Center

The Bismarck radar (KBIS), 93 km from the middle of the area, began a volume at 00:19 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 1621Jul 11, 5:34 PM MDT
• Mesoscale Discussion 1623Jul 11, 8:19 PM MDT
• Mesoscale Discussion 1625Jul 11, 10:34 PM MDT
• Mesoscale Discussion 1626Jul 12, 12:29 AM MDT

000 
WWUS20 KWNS 120020
SEL7  
SPC WW 120020
NDZ000-SDZ000-120800-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 607
NWS STORM PREDICTION CENTER NORMAN OK
620 PM MDT SUN JUL 11 2004

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

       WESTERN NORTH DAKOTA
       NORTHWEST SOUTH DAKOTA

EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 620 PM UNTIL
200 AM MDT.

HAIL TO 2 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 75 STATUTE MILES
EAST AND WEST OF A LINE FROM 65 MILES NORTHWEST OF MINOT NORTH
DAKOTA TO 95 MILES SOUTHEAST OF REDIG SOUTH 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
TORNADOES.

OTHER WATCH INFORMATION...CONTINUE...WW 604...WW 605...WW 606...

DISCUSSION...LINES/CLUSTERS OF INTENSE CONVECTION OVER MT WILL
SPREAD EASTWARD INTO THE WESTERN DAKOTAS THIS EVENING. STRONG
INSTABILITY AND INCREASING VERTICAL SHEAR WILL PROMOTE A RISK OF
SUPERCELLS CAPABLE OF LARGE HAIL AND DAMAGING WINDS.  STORMS MAY
EVENTUALLY ORGANIZE INTO LINEAR MCS LATER THIS EVENING.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 27035.


...HART

485,1003 441,1004 441,1034 485,1035

Severe Thunderstorm Watches in North Dakota, 2004Severe Thunderstorm Watches in South Dakota, 2004Every severe thunderstorm watch in 2004

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.