Friday, September 27, 2019

Hazardous Weather Outlook for McHenry Co., IL

<pre>FLUS43 KLOT 271837
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
137 PM CDT Fri Sep 27 2019


Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-Cook-
La Salle-Kendall-Grundy-Will-Kankakee-Livingston-Iroquois-Ford-
Lake IN-Porter-Newton-Jasper-Benton-
137 PM CDT Fri Sep 27 2019 /237 PM EDT Fri Sep 27 2019/

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

.DAY ONE...This Afternoon and Tonight.

Weather hazards expected...

Elevated Thunderstorm Risk...with an associated:
Elevated hail risk...up to quarter size.
Limited damaging wind risk...up to 60 mph.
Significant Flooding Risk.
High Swim Risk Late Tonight.

DISCUSSION...

The first band of showers and thunderstorms is moving through the
area early this afternoon. Backbuilding storms have developed
along and south of I-80, with the most concentrated area from
Pontiac to Kankakee to Valparaiso. Flash flooding is the highest
concern along this corridor initially. The severe threat is
lower, but some winds to 40 to 45 mph or some small hail is also
possible.

A cold front will bring showers and thunderstorms to the area this
evening. More widespread rainfall is expected, and the concern
for flash flooding may expand a bit farther north toward the
I-80 and I-88 corridor. In addition, some stronger to severe
thunderstorms will be possible mainly later afternoon and evening.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

Saturday...
Limited Flooding Risk.
Limited Thunderstorm Risk.
High Swim Risk
Sunday...
Limited Thunderstorm Risk.
High Swim Risk
Monday and Tuesday...
Limited Thunderstorm Risk.
Wednesday and Thursday...
Limited Thunderstorm Risk.
High Swim Risk

DISCUSSION:

Strong northeast winds will generate high waves causing strong
rip currents and dangerous swim conditions to area beaches.

.SPOTTER INFORMATION STATEMENT...

Spotters may be needed this afternoon through this evening.

GENERAL STORM MOTION OF THE DAY:

Moving toward the northeast at 40 to 45 mph.
</pre>


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