Tornado Watch 183

Issued

May 19, 2013, 2:59 PM CDT (19:59 UTC)

Expired

May 19, 2013, 10:40 PM CDT

In force

8 hr

Issued by

the Storm Prediction Center

Largest hail expected

1.5 in

Strongest gust expected

60 kt

The Des Moines radar (KDMX), 28 km from the middle of the area, began a volume at 19:59 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

20%

One or more EF2 to EF5 tornadoes

20%

Ten or more severe wind reports

30%

One or more gusts of 65 knots or more

10%

Ten or more severe hail reports

20%

One or more hailstones of 2 inches or more

10%

Six or more combined severe hail and wind reports

80%

• Mesoscale Discussion 695May 19, 11:30 AM CDT
• Mesoscale Discussion 710May 19, 7:13 PM CDT
• Mesoscale Discussion 711May 19, 7:46 PM CDT
• Mesoscale Discussion 715May 19, 9:11 PM CDT

924 
WWUS20 KWNS 192003
SEL3  
SPC WW 192003
IAZ000-ILZ000-MOZ000-200300-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 183
NWS STORM PREDICTION CENTER NORMAN OK
300 PM CDT SUN MAY 19 2013

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* TORNADO WATCH FOR PORTIONS OF 
  SOUTHERN IOWA
  NORTHWESTERN ILLINOIS
  NORTHEAST MISSOURI

* EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 300 PM UNTIL
  1000 PM CDT.

* PRIMARY THREATS INCLUDE...
  A FEW TORNADOES POSSIBLE
  SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE
  A FEW LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 55 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 45 MILES NORTH NORTHWEST OF
SHENANDOAH IOWA TO 40 MILES NORTH OF BURLINGTON IOWA.  FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU3).

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 179...WW 180...WW
181...WW 182...

DISCUSSION...STORM DEVELOPMENT CONTINUES SOUTHWARD TOWARD THE
MISSOURI BORDER...ALONG A WIND SHIFT ASSOCIATED WITH THE
CONVECTIVELY GENERATED CYCLONIC VORTICITY CENTER MIGRATING NORTHWARD
THROUGH THE UPPER MISSISSIPPI VALLEY.  ADDITIONAL STORMS CONTINUE TO
DEVELOP AND INTENSIFY...WHILE SPREADING NORTHEASTWARD ACROSS THE
MIDDLE MISSOURI VALLEY...IN THE EXIT REGION OF THE NEXT MID-LEVEL
JET STRONG NOSING THROUGH THE CENTRAL PLAINS.  STRONGEST STORMS MAY
INCLUDE A FEW SUPERCELLS ACROSS THE WATCH AREA INTO EARLY
EVENING...WITH A RISK FOR LARGE HAIL...LOCALLY DAMAGING WIND GUSTS
AND POTENTIAL FOR TORNADOES.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 24035.


...KERR

Tornado Watches in Iowa, 2013Every tornado watch in 2013

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.