Tornado Watch 436

Issued

Jul 18, 2015, 1:31 PM CDT (18:31 UTC)

Expired

Jul 18, 2015, 6:28 PM CDT

In force

5 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

60 kt

The Milwaukee radar (KMKX), 52 km from the middle of the area, began a volume at 18:30 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

50%

One or more EF2 to EF5 tornadoes

20%

Ten or more severe wind reports

70%

One or more gusts of 65 knots or more

20%

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

95%

• Mesoscale Discussion 1464Jul 18, 12:31 PM CDT
• Mesoscale Discussion 1470Jul 18, 5:43 PM CDT

567 
WWUS20 KWNS 181829
SEL6  
SPC WW 181829
IAZ000-ILZ000-INZ000-WIZ000-LMZ000-190300-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 436
NWS STORM PREDICTION CENTER NORMAN OK
130 PM CDT SAT JUL 18 2015

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* TORNADO WATCH FOR PORTIONS OF 
  FAR EASTERN IOWA
  NORTHERN ILLINOIS
  NORTHWEST INDIANA
  SOUTHERN AND EASTERN WISCONSIN
  LAKE MICHIGAN

* EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 130 PM UNTIL
  1000 PM CDT.

* PRIMARY THREATS INCLUDE...
  A FEW TORNADOES POSSIBLE
  SCATTERED DAMAGING WIND GUSTS TO 70 MPH LIKELY
  SCATTERED LARGE HAIL AND ISOLATED VERY LARGE HAIL EVENTS TO 2
    INCHES IN DIAMETER POSSIBLE

SUMMARY...THUNDERSTORMS EXPECTED TO INCREASE IN COVERAGE/STRENGTH
OVER SOUTHERN WI OVER THE NEXT COUPLE HOURS...WITH OTHER DEVELOPMENT
POSSIBLE LATER THIS AFTERNOON OVER FAR EASTERN IA AND NORTHERN IL.
POTENTIAL WILL EXIST FOR SUPERCELLS WITH DAMAGING WIND...HAIL...AND
POSSIBLY A FEW TORNADOES THROUGH EARLY TONIGHT...WITH THE TORNADO
THREAT GREATEST OVER SOUTHERN/EASTERN WI AND NORTHERN IL THIS
AFTERNOON.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 85 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 50 MILES SOUTH SOUTHWEST OF
LONEROCK WISCONSIN TO 50 MILES NORTH NORTHEAST OF VALPARAISO
INDIANA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU6).

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.

&&

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
550. MEAN STORM MOTION VECTOR 28030.


...CORFIDI

Tornado Watches in Illinois, 2015Tornado Watches in Wisconsin, 2015Tornado Watches in Indiana, 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.