250
WWUS20 KWNS 201736
SEL7
SPC WW 201736
ILZ000-WIZ000-LMZ000-202200-

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 267
NWS Storm Prediction Center Norman OK
1240 PM CDT Mon May 20 2024

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of
  Northern Illinois
  Southeast Wisconsin
  Lake Michigan

* Effective this Monday afternoon from 1240 PM until 500 PM CDT.

* Primary threats include...
  Scattered large hail and isolated very large hail events to 2
    inches in diameter possible
  Scattered damaging wind gusts to 65 mph possible
  A tornado or two possible

SUMMARY...Scattered thunderstorms are developing ahead of a low over
southwest Wisconsin.  These storms may pose a risk of hail and
damaging wind gusts through the afternoon.  There is also a small
area of extreme southeast WI with a risk of a tornado or two.

The severe thunderstorm watch area is approximately along and 60
statute miles north and south of a line from 15 miles west northwest
of Janesville WI to 5 miles south southeast of Racine WI. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU7).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

AVIATION...A few severe thunderstorms with hail surface and aloft to
2 inches. Extreme turbulence and surface wind gusts to 55 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
26030.

...Hart