Severe Weather Outlook

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Severe Weather Watches Overview

Watch data currently updates every 15 minutes.

Severe Thunderstorm Watch #0519 for Western Upper Michigan, Northeast Wisconsin, Lake Michigan

Scattered damaging wind gusts to 70 mph possible
Scattered large hail events to 1.5 inches in diameter possible

Severe Thunderstorm Watch #0520 for Northeast Illinois, Northern Indiana, Western Lower Michigan, Lake Michigan

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

Severe Thunderstorm Watch #0521 for East Central Illinois, Central Indiana

Widespread damaging winds and isolated significant gusts to 80 mph likely
Isolated very large hail events to 2 inches in diameter possible
A tornado or two possible

↑ back to the list of watches ↑

Severe Thunderstorm Watch #0519

Locations Affected

Western Upper Michigan

Northeast Wisconsin

Lake Michigan

Severe Thunderstorm Watch Summary

A cluster of intense thunderstorms along the Wisconsin/Michigan border will track southeastward through the late morning, posing a risk of damaging winds and hail.

Severe Weather Threats

Scattered damaging wind gusts to 70 mph possible

Scattered large hail events to 1.5 inches in diameter possible

Severe Thunderstorm Watch Details

SEL9

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 519
NWS Storm Prediction Center Norman OK
840 AM CDT Mon Jul 27 2026

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  Western Upper Michigan
  Northeast Wisconsin
  Lake Michigan

* Effective this Monday morning and afternoon from 840 AM until
  300 PM CDT.

* Primary threats include...
  Scattered damaging wind gusts to 70 mph possible
  Scattered large hail events to 1.5 inches in diameter possible

SUMMARY...A cluster of intense thunderstorms along the
Wisconsin/Michigan border will track southeastward through the late
morning, posing a risk of damaging winds and hail.

The severe thunderstorm watch area is approximately along and 55
statute miles east and west of a line from 55 miles north northeast
of Rhinelander WI to 20 miles east southeast of Manitowoc WI. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU9).

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 518...

AVIATION...A few severe thunderstorms with hail surface and aloft to
1.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
31030.

...Hart

↑ back to the list of watches ↑

Severe Thunderstorm Watch #0520

Locations Affected

Northeast Illinois

Northern Indiana

Western Lower Michigan

Lake Michigan

Severe Thunderstorm Watch 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.

Severe Weather Threats

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

Severe Thunderstorm Watch Details

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

↑ back to the list of watches ↑

Severe Thunderstorm Watch #0521

Locations Affected

East Central Illinois

Central Indiana

Severe Thunderstorm Watch Summary

An intensifying cluster of thunderstorms over northwest Indiana will track southward this afternoon through a very moist and unstable air mass. Severe wind gusts are expected along the leading edge of the storms, along with some risk of large hail and a tornado or two.

Severe Weather Threats

Widespread damaging winds and isolated significant gusts to 80 mph likely

Isolated very large hail events to 2 inches in diameter possible

A tornado or two possible

Severe Thunderstorm Watch Details

SEL1

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 521
NWS Storm Prediction Center Norman OK
240 PM EDT Mon Jul 27 2026

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  East Central Illinois
  Central Indiana

* Effective this Monday afternoon and evening from 240 PM until
  900 PM EDT.

* Primary threats include...
  Widespread damaging winds and isolated significant gusts to 80
    mph likely
  Isolated very large hail events to 2 inches in diameter possible
  A tornado or two possible

SUMMARY...An intensifying cluster of thunderstorms over northwest
Indiana will track southward this afternoon through a very moist and
unstable air mass.  Severe wind gusts are expected along the leading
edge of the storms, along with some risk of large hail and a tornado
or two.

The severe thunderstorm watch area is approximately along and 70
statute miles east and west of a line from 15 miles north northeast
of Lafayette IN to 35 miles south of Bloomington IN. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU1).

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...WW 520...

AVIATION...A few severe thunderstorms with hail surface and aloft to
2 inches. Extreme turbulence and surface wind gusts to 70 knots. A
few cumulonimbi with maximum tops to 550. Mean storm motion vector
31035.

...Hart

National Risk Overview

Monday, July 27: TORNADO: 2%; HAIL: 15%; WIND: 30%
Tuesday, July 28: TORNADO: 5%; HAIL: 15%; WIND: 30%
Wednesday, July 29: ANY SEVERE: 5%
Thursday, July 30: ANY SEVERE: predictability too low
Friday, July 31: ANY SEVERE: predictability too low
Saturday, August 1: ANY SEVERE: potential too low
Sunday, August 2: ANY SEVERE: predictability too low
Monday, August 3: ANY SEVERE: predictability too low

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