Tornado Watch 216

Issued

Apr 26, 2011, 2:02 PM CDT (19:02 UTC)

Expired

Apr 26, 2011, 9:00 PM CDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

60 kt

The Grand Rapids radar (KGRR), 63 km from the middle of the area, began a volume at 19:02 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

40%

One or more EF2 to EF5 tornadoes

20%

Ten or more severe wind reports

30%

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

30%

Six or more combined severe hail and wind reports

80%

• Mesoscale Discussion 587Apr 26, 12:26 PM CDT
• Mesoscale Discussion 596Apr 26, 3:53 PM CDT
• Mesoscale Discussion 598Apr 26, 4:38 PM CDT
• Mesoscale Discussion 605Apr 26, 7:33 PM CDT
• Mesoscale Discussion 607Apr 26, 8:35 PM CDT

119 
WWUS20 KWNS 261904
SEL6
SPC WW 261904
ILZ000-INZ000-MIZ000-OHZ000-LEZ000-LHZ000-LMZ000-270200-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 216
NWS STORM PREDICTION CENTER NORMAN OK
305 PM EDT TUE APR 26 2011

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

       EASTERN ILLINOIS
       NORTHERN AND CENTRAL INDIANA
       MUCH OF LOWER MICHIGAN
       NORTHWEST OHIO
       LAKE ERIE
       LAKE HURON
       LAKE MICHIGAN

EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 305 PM UNTIL
1000 PM EDT.

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 90 STATUTE
MILES EAST AND WEST OF A LINE FROM 50 MILES NORTHWEST OF BAD AXE
MICHIGAN TO 20 MILES SOUTHWEST OF INDIANAPOLIS INDIANA.  FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU6).

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 213...WW 214...WW 215...

DISCUSSION...AS A SURFACE LOW CONTINUES TO DEVELOP NORTHEASTWARD
TOWARD LAKE MICHIGAN...RELATIVELY LOW TOPPED STORMS ARE EXPECTED TO
INCREASE THROUGH THE AFTERNOON AHEAD OF A COLD FRONT. AS THE AIRMASS
CONTINUES TO GRADUALLY DESTABILIZE...STRONG SOUTHWESTERLY DEEP
TROPOSPHERIC FLOW WILL SUPPORT THE DEVELOPMENT OF SOME
SUPERCELLS/ORGANIZED LINEAR CLUSTERS CAPABLE OF DAMAGING
WINDS...SEVERE HAIL...AND A FEW 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
400. MEAN STORM MOTION VECTOR 24040.


...GUYER/HART

Tornado Watches in Indiana, 2011Tornado Watches in Michigan, 2011Tornado Watches in Ohio, 2011Every tornado watch in 2011

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.