Tornado Watch 501

Issued

Sep 10, 2014, 1:54 PM EDT (17:54 UTC)

Expired

Sep 10, 2014, 11:00 PM EDT

In force

9 hr

Issued by

the Storm Prediction Center

Largest hail expected

0.5 in

Strongest gust expected

60 kt

The Northern Indiana radar (KIWX), 105 km from the middle of the area, began a volume at 17:53 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

60%

One or more EF2 to EF5 tornadoes

20%

Ten or more severe wind reports

50%

One or more gusts of 65 knots or more

10%

Ten or more severe hail reports

5%

One or more hailstones of 2 inches or more

5%

Six or more combined severe hail and wind reports

80%

• Mesoscale Discussion 1707Sep 10, 11:34 AM EDT
• Mesoscale Discussion 1708Sep 10, 2:48 PM EDT
• Mesoscale Discussion 1709Sep 10, 4:08 PM EDT
• Mesoscale Discussion 1711Sep 10, 6:11 PM EDT
• Mesoscale Discussion 1713Sep 10, 8:51 PM EDT

742 
WWUS20 KWNS 101800
SEL1  
SPC WW 101800
INZ000-MIZ000-OHZ000-LEZ000-110100-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 501
NWS STORM PREDICTION CENTER NORMAN OK
155 PM EDT WED SEP 10 2014

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* TORNADO WATCH FOR PORTIONS OF 
  WEST CENTRAL THROUGH EASTERN INDIANA
  SOUTHEAST LOWER MICHIGAN
  WESTERN AND NORTHERN OHIO
  LAKE ERIE

* EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 155 PM
  UNTIL 900 PM EDT.

* PRIMARY THREATS INCLUDE...
  A FEW TORNADOES LIKELY
  SCATTERED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 60 STATUTE
MILES EAST AND WEST OF A LINE FROM 50 MILES NORTHEAST OF TOLEDO
OHIO TO 20 MILES EAST OF BLOOMINGTON INDIANA.  FOR A COMPLETE
DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE
(WOUS64 KWNS WOU1).

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.

&&

DISCUSSION...SHOWERS AND POSSIBLE WEAK TSTMS EXPECTED TO CONTINUE
FORMING ALONG RESIDUAL LOW-LVL CONFLUENCE BAND EXTENDING ROUGHLY NNE
FROM TERRE HAUTE IND TO W OF DETROIT MI. COMBINATION OF VERY STRONG
LOW-LVL SPEED/DIRECTIONAL SHEAR /WITH 0-1 KM SRH AOA 250 M2 PER S2/
COUPLED WITH PERSISTENT...VERY MOIST LOW-LVL INFLOW /PW AROUND 2
INCHES/ AND MODEST SFC HEATING SUGGESTS POTENTIAL FOR LOW-LVL
SHOWER/STORM ROTATION AND POSSIBLE TORNADOES/LOCALLY DMGG WIND
GUSTS...DESPITE RELATIVELY MEAGER LOW TO MID-LVL BUOYANCY.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
300. MEAN STORM MOTION VECTOR 24040.


...CORFIDI

Tornado Watches in Indiana, 2014Tornado Watches in Ohio, 2014Tornado Watches in Michigan, 2014Every tornado watch in 2014

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.