WW 417 SEVERE TSTM IL IN MI LM 291810Z – 300000Z
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 417
NWS Storm Prediction Center Norman OK
210 PM EDT Thu Jun 29 2023
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Southern Illinois
Western and Central Indiana
Southwest Lower Michigan
Lake Michigan
* Effective this Thursday afternoon and evening from 210 PM until
800 PM EDT.
* Primary threats include...
Scattered damaging winds likely with isolated significant gusts
to 75 mph possible
Isolated very large hail events to 2 inches in diameter possible
A tornado or two possible
SUMMARY...An intense/fast-moving squall line will continue generally
eastward into Indiana, southern Illinois and possibly far southwest
Lower Michigan this afternoon. It may eventually weaken as it moves
across Indiana, but damaging winds, some hail, and possibly a brief
tornado will all be possible, especially across western Indiana
through early/mid-afternoon.
The severe thunderstorm watch area is approximately along and 45
statute miles east and west of a line from 15 miles west northwest
of South Bend IN to 10 miles east southeast of Evansville IN. 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.
&&
OTHER WATCH INFORMATION...CONTINUE...WW 415...WW 416...
AVIATION...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 600. Mean storm motion vector
28045.
...Guyer
