Tornado Watch 613

Issued

Jul 12, 2004, 6:20 PM CDT (23:20 UTC)

Expired

Jul 13, 2004, 1:00 AM CDT

In force

7 hr

Issued by

the Storm Prediction Center

The Omaha radar (KOAX), 141 km from the middle of the area, began a volume at 23:23 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 1635Jul 12, 5:41 PM CDT
• Mesoscale Discussion 1636Jul 12, 7:45 PM CDT
• Mesoscale Discussion 1637Jul 12, 9:19 PM CDT
• Mesoscale Discussion 1638Jul 12, 11:19 PM CDT
• Mesoscale Discussion 1639Jul 12, 11:52 PM CDT

000 
WWUS20 KWNS 122318
SEL3  
SPC WW 122320
IAZ000-MNZ000-NEZ000-SDZ000-130600-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 613
NWS STORM PREDICTION CENTER NORMAN OK
620 PM CDT MON JUL 12 2004

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

       WESTERN IOWA
       SOUTHWEST MINNESOTA
       NORTHEAST AND CENTRAL NEBRASKA
       SOUTHEAST SOUTH DAKOTA

EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 620 PM UNTIL
100 AM 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 ALONG AND 80 STATUTE MILES EAST AND WEST
OF A LINE FROM 30 MILES NORTHEAST OF SIOUX FALLS SOUTH DAKOTA TO
10 MILES SOUTHWEST OF COLUMBUS 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...THIS TORNADO WATCH REPLACES TORNADO
WATCH NUMBER 612. WATCH NUMBER 612 WILL NOT BE IN EFFECT AFTER 620
PM CDT. 

DISCUSSION...SUPERCELL STORMS CONTINUE TO INTENSIFY OVER NORTHERN
NEB AND SOUTHEAST SD.  THESE STORMS...AS WELL AS NEW DEVELOPMENT
INTO CENTRAL NEB...WILL TRACK SOUTHEASTWARD THROUGH THE EVENING
HOURS. VERY LARGE HAIL AND DAMAGING WINDS WILL BE POSSIBLE...ALONG
WITH A RISK OF ISOLATED TORNADOES.

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 30030.


...HART

435,0944 412,0955 412,0990 435,0975

Tornado Watches in Nebraska, 2004Tornado Watches in Iowa, 2004Tornado Watches in South Dakota, 2004Every tornado 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.