Tornado Watch 338

Issued

Jun 22, 2015, 8:17 PM CDT (01:17 UTC)

Expired

Jun 23, 2015, 2:00 AM CDT

In force

6 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

65 kt

The Grand Rapids radar (KGRR), 76 km from the middle of the area, began a volume at 01:19 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

30%

One or more EF2 to EF5 tornadoes

20%

Ten or more severe wind reports

50%

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

40%

Six or more combined severe hail and wind reports

80%

• Mesoscale Discussion 1124Jun 22, 7:31 PM CDT
• Mesoscale Discussion 1128Jun 22, 10:00 PM CDT
• Mesoscale Discussion 1129Jun 23, 1:43 AM CDT

761 
WWUS20 KWNS 230114
SEL8  
SPC WW 230114
ILZ000-INZ000-MIZ000-OHZ000-LEZ000-LHZ000-230700-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 338
NWS STORM PREDICTION CENTER NORMAN OK
915 PM EDT MON JUN 22 2015

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* TORNADO WATCH FOR PORTIONS OF 
  NORTHEAST ILLINOIS
  NORTHERN INDIANA
  SOUTHERN LOWER MICHIGAN
  NORTHWEST OHIO
  LAKE ERIE
  LAKE HURON

* EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 915 PM
  UNTIL 300 AM EDT.

* PRIMARY THREATS INCLUDE...
  A COUPLE TORNADOES POSSIBLE
  SCATTERED DAMAGING WINDS AND ISOLATED SIGNIFICANT GUSTS TO 75
    MPH POSSIBLE
  SCATTERED LARGE HAIL AND ISOLATED VERY LARGE HAIL EVENTS TO 2
    INCHES IN DIAMETER POSSIBLE

SUMMARY...THUNDERSTORMS ARE LIKELY TO INCREASE IN COVERAGE AND
INTENSITY THIS EVENING AS A STRONG UPPER JET AND COLD FRONT APPROACH
THE REGION FROM THE WEST. A WARM AND VERY MOIST AIRMASS ACROSS THE
WATCH AREA WILL FUEL ROBUST STORM UPDRAFTS AMIDST INTENSIFYING
DEEP-LAYER WIND FIELDS. THIS SHOULD SUPPORT BOTH SUPERCELL AND
FAST-MOVING LINE SEGMENTS WITH DAMAGING WINDS...LARGE HAIL...AND
POSSIBLY A COUPLE TORNADOES.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 70 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 35 MILES NORTH OF MOUNT
CLEMENS MICHIGAN TO 45 MILES NORTH OF CHAMPAIGN ILLINOIS.  FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU8).

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 335...WW 336...WW 337...

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 65 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 27035.


...CARBIN

Tornado Watches in Michigan, 2015Tornado Watches in Indiana, 2015Tornado Watches in Ohio, 2015Every tornado watch in 2015

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.