440
WHUS53 KLOT 180259
SMWLOT
LMZ740-741-745-777-779-180430-
/O.NEW.KLOT.MA.W.0029.260418T0259Z-260418T0430Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Special Marine Warning
National Weather Service Chicago/Romeoville
959 PM CDT Fri Apr 17 2026

The National Weather Service in Chicago has issued a

* Special Marine Warning for...

  Nearshore Waters from Winthrop Harbor to Northerly Island...
  Nearshore Waters from Burns Harbor to Michigan City...
  Open Waters from Winthrop Harbor to Michigan City out to Mid
Lake...

* Until 1130 PM CDT.

* At 959 PM CDT, strong thunderstorms were located along a line
  extending from Waukegan Harbor to near Wilmette Harbor to near
  Montrose Harbor to 16 nm south of Joliet, moving northeast at 45
  knots.

  HAZARD...Wind gusts to nearly 50 knots.

  SOURCE...Radar.

  IMPACT...Small craft could be damaged in briefly higher winds and
           suddenly higher waves.

* Locations impacted include...
  Harrison-Dever Crib, Wilmette Harbor, Winthrop Harbor, Montrose
  Harbor, Monroe Harbor, Waukegan Harbor, Burns Harbor, Belmont
  Harbor, Diversy Harbor, and DuSable Harbor.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 1100 PM CDT for northeastern
Illinois...and the adjacent waters of Lake Michigan.

Move to safe harbor until hazardous weather passes.

&&

LAT...LON 4172 8691 4165 8715 4178 8721 4198 8726
      4187 8762 4189 8762 4189 8760 4190 8762
      4206 8767 4214 8775 4227 8783 4248 8780
      4246 8702 4213 8696 4179 8697 4179 8696
TIME...MOT...LOC 0259Z 239DEG 44KT 4236 8782 4214 8773 4197 8772 4127
8798

HAIL...0.00IN
WIND...49KTS

$$

Izzi