Severe Thunderstorm Watch 532

Issued

Jul 27, 2012, 2:43 PM EDT (18:43 UTC)

Expired

Jul 27, 2012, 10:55 PM EDT

In force

8 hr

Issued by

the Storm Prediction Center

Largest hail expected

1.5 in

Strongest gust expected

65 kt

The Northern Indiana radar (KIWX), 123 km from the middle of the area, began a volume at 18:46 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

5%

Ten or more severe wind reports

90%

One or more gusts of 65 knots or more

30%

Ten or more severe hail reports

40%

One or more hailstones of 2 inches or more

10%

Six or more combined severe hail and wind reports

95%

• Mesoscale Discussion 1621Jul 27, 1:52 PM EDT
• Mesoscale Discussion 1625Jul 27, 5:15 PM EDT
• Mesoscale Discussion 1628Jul 27, 8:28 PM EDT

244 
WWUS20 KWNS 271851
SEL2
SPC WW 271851
INZ000-KYZ000-MIZ000-OHZ000-LEZ000-280300-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 532
NWS STORM PREDICTION CENTER NORMAN OK
245 PM EDT FRI JUL 27 2012

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

       INDIANA
       NORTHERN KENTUCKY
       SOUTHERN LOWER MICHIGAN
       WESTERN AND NORTHERN OHIO
       LAKE ERIE

EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 245 PM UNTIL
1100 PM EDT.

HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 75
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 115
STATUTE MILES EAST AND WEST OF A LINE FROM 45 MILES NORTHEAST OF
TOLEDO OHIO TO 70 MILES SOUTHEAST OF BLOOMINGTON INDIANA.  FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU2).

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 531...

DISCUSSION...TSTMS EXPECTED TO INCREASE IN COVERAGE AND STRENGTH IN
SEVERAL AREAS OF LOW LVL MESOSCALE ASCENT OVER THE MIDWEST/OH VLY
LATER THIS AFTN THROUGH EARLY TNGT.  STORMS SHOULD CONTINUE TO FORM
INVOF EWD-MOVING SRN LWR MI SFC WAVE...AND ALONG TRAILING COLD FRONT
TO ITS SW. OTHER STORMS MAY FORM/STRENGTHEN INTO THE BOUNDARY LAYER
FROM EXISTING ELEVATED CONVECTION ALONG ERN EDGE OF APPARENT EML NOW
OVER CNTRL IND. COMBINATION OF FAIRLY RICH MOISTURE...AMPLE DEEP
SHEAR...AND LARGE SCALE FORCING FOR ASCENT WITH CONTINUING
AMPLIFICATION OF LARGER SCALE UPR TROUGH SUGGEST POTENTIAL FOR
UPSCALE DEVELOPMENT INTO BOWING SEGMENTS WITH DMGG WIND/SVR HAIL.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 65
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM
MOTION VECTOR 27030.


...CORFIDI

Severe Thunderstorm Watches in Indiana, 2012Severe Thunderstorm Watches in Ohio, 2012Severe Thunderstorm Watches in Kentucky, 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.