Severe Thunderstorm Watch 211

Issued

Apr 30, 2012, 6:04 PM EDT (22:04 UTC)

Expired

May 1, 2012, 1:00 AM EDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

1.5 in

Strongest gust expected

60 kt

The Cincinnati radar (KILN), 37 km from the middle of the area, began a volume at 22:06 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

10%

Ten or more severe wind reports

70%

One or more gusts of 65 knots or more

10%

Ten or more severe hail reports

30%

One or more hailstones of 2 inches or more

5%

Six or more combined severe hail and wind reports

95%

• Mesoscale Discussion 634Apr 30, 4:52 PM EDT
• Mesoscale Discussion 638Apr 30, 9:07 PM EDT

228 
WWUS20 KWNS 302209
SEL1
SPC WW 302209
INZ000-KYZ000-OHZ000-LEZ000-010500-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 211
NWS STORM PREDICTION CENTER NORMAN OK
605 PM EDT MON APR 30 2012

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

       EASTERN INDIANA
       CENTRAL AND EASTERN KENTUCKY
       WESTERN AND CENTRAL OHIO
       LAKE ERIE

EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 605 PM UNTIL
100 AM EDT.

HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 65
STATUTE MILES EAST AND WEST OF A LINE FROM 50 MILES NORTHEAST OF
FINDLAY OHIO TO 60 MILES EAST SOUTHEAST OF BOWLING GREEN
KENTUCKY.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).

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 208...WW 209...WW 210...

DISCUSSION...NE-SE IND-KY SQLN EXPECTED TO CONTINUE EWD AT ABOUT 30
KTS.  AREA VWP DATA N OF THE OH RVR SHOW 30-50 KT UNIDIRECTIONAL
WSWLY 700-500 MB FLOW...WITH SOMEWHAT WEAKER SPEEDS FARTHER S.
COUPLED WITH 1000-1500 J/KG CAPE AHEAD OF LINE...SETUP MAY CONTINUE
TO YIELD EMBEDDED ROTATING STRUCTURES/TRANSIENT SUPERCELLS WITH A
RISK FOR DMGG WIND...MARGINALLY SVR HAIL...AND PERHAPS A BRIEF
TORNADO OR TWO.  THIS THREAT MAY BUILD E ALONG FRONT STALLED ROUGHLY
W-E ACROSS NRN OH LATER THIS EVE AS UPR IMPULSE NOW CROSSING THE MID
MS VLY CONTINUES ENEWD.

AVIATION...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 450. MEAN STORM
MOTION VECTOR 24030.


...CORFIDI

Severe Thunderstorm Watches in Ohio, 2012Severe Thunderstorm Watches in Kentucky, 2012Severe Thunderstorm Watches in Indiana, 2012Every severe thunderstorm watch in 2012

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.