Tuesday, July 27, 2021

Hazardous Weather Outlook for McHenry Co., IL

<pre>FLUS43 KLOT 270858
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
358 AM CDT Tue Jul 27 2021


Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
358 AM CDT Tue Jul 27 2021 /458 AM EDT Tue Jul 27 2021/

This Hazardous Weather Outlook is for portions of North Central
Illinois...Northeast Illinois and Northwest Indiana.

.DAY ONE...Today and Tonight.

Weather hazards expected...

Limited Thunderstorm Risk tonight...with an associated:
Limited damaging wind risk...up to 60 mph.

DISCUSSION...

Isolated thunderstorms are possible late tonight in far northern
Illinois. If some do develop, they could have a marginally
severe wind threat.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Wednesday...
Limited Excessive Heat Risk.
Limited Severe Thunderstorm Risk.
Limited Flooding Risk.
Thursday...
Limited Excessive Heat Risk south of I-80.
Limited Severe Thunderstorm Risk south of I-80.
High Swim Risk.
Friday...
High Swim Risk.
Saturday...
Limited Thunderstorm Risk.

DISCUSSION:

Heat index readings will likely top 100 degrees in parts of
north central Illinois Wednesday afternoon.

Isolated thunderstorms are possible during the day Wednesday,
some of which could be strong. On Wednesday night, organized
thunderstorms are likely to move from Wisconsin into northeast
Illinois and northwest Indiana, bringing potential for severe
winds, as well as locally heavy rainfall. Some storms are
likely to continue into early Thursday morning in these areas.

Scattered thunderstorms are possible south of I-80 on Thursday
afternoon. A few of these could be severe.

Increased wave action will develop along southern Lake
Michigan beaches Thursday afternoon through midday Friday,
creating dangerous swimming conditions.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated today or tonight.

GENERAL STORM MOTION OF THE DAY:

Moving toward the southeast at 35 mph.
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