Tornado Watch 145

Issued

May 11, 2014, 7:49 PM CDT (00:49 UTC)

Expired

May 12, 2014, 3:00 AM CDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

60 kt

The Des Moines radar (KDMX), 33 km from the middle of the area, began a volume at 00:52 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.

Two or more tornadoes

50%

One or more EF2 to EF5 tornadoes

20%

Ten or more severe wind reports

40%

One or more gusts of 65 knots or more

20%

Ten or more severe hail reports

60%

One or more hailstones of 2 inches or more

30%

Six or more combined severe hail and wind reports

80%

• Mesoscale Discussion 567May 11, 5:09 PM CDT
• Mesoscale Discussion 570May 11, 6:23 PM CDT
• Mesoscale Discussion 571May 11, 7:04 PM CDT
• Mesoscale Discussion 575May 11, 9:31 PM CDT
• Mesoscale Discussion 576May 11, 11:01 PM CDT

554 
WWUS20 KWNS 120045
SEL5  
SPC WW 120045
IAZ000-120800-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 145
NWS STORM PREDICTION CENTER NORMAN OK
745 PM CDT SUN MAY 11 2014

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* TORNADO WATCH FOR PORTIONS OF 
  CENTRAL AND SOUTHERN IOWA

* EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 745 PM
  UNTIL 300 AM CDT.

* PRIMARY THREATS INCLUDE...
  A FEW TORNADOES POSSIBLE
  SCATTERED LARGE HAIL LIKELY WITH ISOLATED VERY LARGE HAIL EVENTS
    TO 2 INCHES IN DIAMETER POSSIBLE
  SCATTERED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 75 STATUTE
MILES EAST AND WEST OF A LINE FROM 10 MILES EAST OF LAMONI IOWA
TO 35 MILES NORTHEAST OF FORT DODGE IOWA.  FOR A COMPLETE
DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE
(WOUS64 KWNS WOU5).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 142...WW 143...WW 144...

DISCUSSION...ORGANIZED CLUSTER OF SEVERE THUNDERSTORMS...WITH
EMBEDDED SUPERCELLS...WILL PROGRESS ACROSS WESTERN INTO
CENTRAL/SOUTHERN IA OVER THE NEXT FEW HOURS.  LARGE HAIL AND
DAMAGING WINDS ARE LIKELY.  ADDITIONALLY...TORNADOES REMAIN POSSIBLE
WITH SUPERCELL STRUCTURES.

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 24035.


...DARROW

Tornado Watches in Iowa, 2014Every tornado watch in 2014

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.