Saturday, May 12, 2018

Hazardous Weather Outlook for McHenry Co., IL

<pre>FLUS43 KLOT 121804 HWOLOT

Hazardous Weather Outlook National Weather Service Chicago/Romeoville IL 104 PM CDT Sat May 12 2018

Winnebago-Boone-McHenry-Lake Illinois-Ogle-Lee-De Kalb-Kane- DuPage-Cook-La Salle-Kendall-Grundy-Will-Kankakee-Livingston- Iroquois-Ford-Lake Indiana-Porter-Newton-Jasper-Benton- 104 PM CDT Sat May 12 2018 /204 PM EDT Sat May 12 2018/

THIS HAZARDOUS WEATHER OUTLOOK IS FOR North Central Illinois… Northeast Illinois AND Northwest Indiana.

.DAY ONE…This Afternoon and Tonight.

WEATHER HAZARDS EXPECTED:

Significant Thunderstorm Risk...with an associated:      Limited Hail Risk...up to half dollar size.  Elevated Flooding Risk.

DISCUSSION:

Showers and thunderstorms are expected early this afternoon across northern Illinois and northwest Indiana. The severe threat with these storms is low. However, some small hail and a brief period of heavy rainfall will be possible with the strongest storms.

Another round of showers and thunderstorms is expected to develop across the area this evening and continue through the overnight hours. Multiple heavy rain producing storms may move over the same areas resulting in an increased threat for flash flooding especially between I-88 and I-80. Some storms could also be severe tonight, particularly along and south of I-80. The primary severe threat is large hail.

.DAYS TWO THROUGH SEVEN…Sunday through Friday.

Sunday…

Limited Flooding Risk.  Limited Severe Thunderstorm Risk.

Monday…

Limited Severe Thunderstorm Risk.

Tuesday…

Elevated Thunderstorm Risk.

Wednesday through Friday…

Limited Thunderstorm Risk.

DISCUSSION:

Periods of showers and thunderstorms will remain possible over the next several days, as a nearly stationary frontal boundary remains just south of the outlook area. There is some potential for strong to severe storms, along with heavy rainfall, again Sunday night and late Monday into Monday night.

.SPOTTER INFORMATION STATEMENT…

Spotters may be needed tonight.

GENERAL STORM MOTION OF THE DAY:

Moving east at 35 to 40 MPH.

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