SEL0

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 520
NWS Storm Prediction Center Norman OK
1245 PM EDT Mon Jul 27 2026

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of
Northeast Illinois
Northern Indiana
Western Lower Michigan
Lake Michigan

* Effective this Monday afternoon and evening from 1245 PM until
800 PM EDT.

* Primary threats include...
Scattered damaging winds and isolated significant gusts to 75
mph likely
Scattered large hail and isolated very large hail events to 2
inches in diameter possible
A tornado or two possible

SUMMARY...Clusters of thunderstorms will track southeastward through
the afternoon across the watch area. Damaging winds, large hail,
and even a tornado or two are possible.

The severe thunderstorm watch area is approximately along and 70
statute miles east and west of a line from 70 miles north of
Muskegon MI to 60 miles south southeast of Valparaiso IN. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU0).

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 519...

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 500. Mean storm motion vector
31030.

...Hart

WOUS64 KWNS 271641
WOU0

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH OUTLINE UPDATE FOR WS 520
NWS STORM PREDICTION CENTER NORMAN OK
1245 PM EDT MON JUL 27 2026

SEVERE THUNDERSTORM WATCH 520 IS IN EFFECT UNTIL 800 PM EDT
FOR THE FOLLOWING LOCATIONS

ILC031-043-075-091-097-197-280000-
/O.NEW.KWNS.SV.A.0520.260727T1645Z-260728T0000Z/

IL
. ILLINOIS COUNTIES INCLUDED ARE

COOK DUPAGE IROQUOIS
KANKAKEE LAKE WILL


INC003-007-017-033-039-049-069-073-085-087-089-091-099-103-111-
113-127-131-141-149-151-169-181-183-280000-
/O.NEW.KWNS.SV.A.0520.260727T1645Z-260728T0000Z/

IN
. INDIANA COUNTIES INCLUDED ARE

ALLEN BENTON CASS
DE KALB ELKHART FULTON
HUNTINGTON JASPER KOSCIUSKO
LAGRANGE LAKE LA PORTE
MARSHALL MIAMI NEWTON
NOBLE PORTER PULASKI
ST. JOSEPH STARKE STEUBEN
WABASH WHITE WHITLEY


MIC005-015-021-023-025-027-035-037-045-057-059-065-067-073-075-
077-081-085-105-107-117-121-123-127-133-139-149-159-280000-
/O.NEW.KWNS.SV.A.0520.260727T1645Z-260728T0000Z/

MI
. MICHIGAN COUNTIES INCLUDED ARE

ALLEGAN BARRY BERRIEN
BRANCH CALHOUN CASS
CLARE CLINTON EATON
GRATIOT HILLSDALE INGHAM
IONIA ISABELLA JACKSON
KALAMAZOO KENT LAKE
MASON MECOSTA MONTCALM
MUSKEGON NEWAYGO OCEANA
OSCEOLA OTTAWA ST. JOSEPH
VAN BUREN


LMZ043-046-080-669-671-673-675-740-741-742-743-744-745-777-779-
844-845-846-847-848-849-868-870-872-874-876-878-280000-
/O.NEW.KWNS.SV.A.0520.260727T1645Z-260728T0000Z/

CW

. ADJACENT COASTAL WATERS INCLUDED ARE

NEW BUFFALO MI TO ST JOSEPH MI

MICHIGAN CITY IN TO NEW BUFFALO MI

LAKE MICHIGAN MICHIGAN CITY IN TO ST. JOSEPH MI 5 NM OFFSHORE TO
MID-LINE OF LAKE.

LAKE MICHIGAN FROM SHEBOYGAN TO PORT WASHINGTON WI 5NM OFFSHORE
TO MID LAKE

LAKE MICHIGAN FROM PORT WASHINGTON TO NORTH POINT LIGHT WI 5NM
OFFSHORE TO MID LAKE

LAKE MICHIGAN FROM NORTH POINT LIGHT TO WIND POINT WI 5NM
OFFSHORE TO MID LAKE

LAKE MICHIGAN FROM WIND POINT WI TO WINTHROP HARBOR IL 5NM
OFFSHORE TO MID LAKE

WINTHROP HARBOR TO WILMETTE HARBOR IL

WILMETTE HARBOR TO NORTHERLY ISLAND IL

NORTHERLY ISLAND TO CALUMET HARBOR IL

CALUMET HARBOR IL TO GARY IN

GARY TO BURNS HARBOR IN

BURNS HARBOR TO MICHIGAN CITY IN

LAKE MICHIGAN FROM WINTHROP HARBOR TO WILMETTE HARBOR IL 5NM
OFFSHORE TO MID LAKE

LAKE MICHIGAN FROM WILMETTE HARBOR TO MICHIGAN CITY IN 5NM
OFFSHORE TO MID LAKE

ST JOSEPH TO SOUTH HAVEN MI

SOUTH HAVEN TO HOLLAND MI

HOLLAND TO GRAND HAVEN MI

GRAND HAVEN TO WHITEHALL MI

WHITEHALL TO PENTWATER MI

PENTWATER TO MANISTEE MI

LAKE MICHIGAN FROM PENTWATER TO MANISTEE MI 5NM OFFSHORE TO MID
LAKE

LAKE MICHIGAN FROM WHITEHALL TO PENTWATER MI 5NM OFFSHORE TO MID
LAKE

LAKE MICHIGAN FROM GRAND HAVEN TO WHITEHALL MI 5NM OFFSHORE TO
MID LAKE

LAKE MICHIGAN FROM HOLLAND TO GRAND HAVEN MI 5NM OFFSHORE TO MID
LAKE

LAKE MICHIGAN FROM SOUTH HAVEN TO HOLLAND MI 5NM OFFSHORE TO MID
LAKE

LAKE MICHIGAN FROM ST JOSEPH TO SOUTH HAVEN MI 5NM OFFSHORE TO
MID LAKE

ATTN...WFO...LOT...GRR...MKX...IWX...