Tornado Watch 680

Issued

Jul 25, 2005, 3:30 PM CDT (20:30 UTC)

Expired

Jul 25, 2005, 10:00 PM CDT

In force

7 hr

Issued by

the Storm Prediction Center

The Minneapolis radar (KMPX), 130 km from the middle of the area, began a volume at 20:33 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 1863Jul 25, 1:55 PM CDT
• Mesoscale Discussion 1866Jul 25, 4:22 PM CDT
• Mesoscale Discussion 1872Jul 25, 6:56 PM CDT
• Mesoscale Discussion 1875Jul 25, 9:09 PM CDT

000 
WWUS20 KWNS 252028
SEL0  
SPC WW 252028
IAZ000-MNZ000-260300-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 680
NWS STORM PREDICTION CENTER NORMAN OK
330 PM CDT MON JUL 25 2005

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

       NORTHERN IOWA
       SOUTHERN MINNESOTA

EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 330 PM UNTIL 1000
PM CDT.

TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 65 STATUTE MILES
NORTH AND SOUTH OF A LINE FROM 15 MILES SOUTHWEST OF WORTHINGTON
MINNESOTA TO 55 MILES EAST SOUTHEAST OF ROCHESTER MINNESOTA.  FOR
A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU0).

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 677...WW 678...WW 679...

DISCUSSION...A WARM FRONT IS BECOMING BETTER DEFINED ACROSS NRN
IA...AND THIS BOUNDARY SHOULD LIFT NWD INTO SRN MN IN ADVANCE OF A
SURFACE LOW DEVELOPING ENEWD FROM NEB. STRONG INSTABILITY IS
PRESENT ALONG AND S OF THE WARM FRONT ACROSS IA...WHILE VERTICAL
SHEAR IS GRADUALLY INCREASING ALONG AND N OF THE BOUNDARY. 
WIDESPREAD CONVECTION IS EXPECTED ALONG AND N OF THE WARM FRONT
THROUGH THIS EVENING...AND IT IS POSSIBLE THAT A FEW SUPERCELLS WILL
OCCUR WITHIN THE LARGE STORM AREA...WITH THE POSSIBILITY OF LARGE
HAIL/DAMAGING WINDS AND A COUPLE OF TORNADOES.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550.
MEAN STORM MOTION VECTOR 27025.


...THOMPSON

442,0954 443,0912 424,0912 423,0954

Tornado Watches in Iowa, 2005Tornado Watches in Minnesota, 2005Tornado Watches in Wisconsin, 2005Every tornado watch in 2005

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.