377
FLUS43 KLOT 200827
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
327 AM CDT Mon May 20 2024

ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-210830-
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-
327 AM CDT Mon May 20 2024 /427 AM EDT Mon May 20 2024/

This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.

.DAY ONE...Today and Tonight.

Weather hazards expected...

  Elevated Thunderstorm Risk...with an associated:
     Limited Hail Risk...up to half dollar size.
     Limited Damaging Wind Risk...up to 60 mph.
  Limited Flooding Risk.

DISCUSSION...

There is a chance for thunderstorms this morning, mainly
northwest of a Peru Illinois to Waukegan Illinois line. Severe
weather is unlikely this morning.

Additional scattered thunderstorms are expected to develop midday
and continue into the afternoon. A few of these storms could
become severe, with the main threats being large hail and locally
damaging winds. While there is a severe weather threat across the
outlook area, the highest probabilities appear to be north of
Interstate 80 with Noon to 7 PM the most favored timing for the
severe weather potential.

In addition, thunderstorms will be capable of producing torrential
downpours which could lead to some localized flooding, particularly
in more suburban and urban areas.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Tuesday...
  Limited Thunderstorm Risk.
Tuesday night...
  Significant Thunderstorm Risk with an:
    Elevated Severe Thunderstorm Risk.
  Limited Flooding Risk.
Friday through Sunday...
  Limited Thunderstorm Risk.

DISCUSSION...

There is a chance for thunderstorms early Tuesday morning, mainly
across northern Illinois northwest of Interstate 55. There is
also a slight chance of thunderstorms area wide Tuesday afternoon
If any storms do occur during the day Tuesday, the threat of
severe weather appears rather low.

Additional thunderstorms are likely Tuesday evening into Tuesday
night. Some of these storms could become severe, with the
potential for damaging winds and perhaps brief tornadoes. While
there is a threat of severe weather across the entire outlook
area, the severe weather threat appears greatest near and west of
the Interstate 39 corridor.

.SPOTTER INFORMATION STATEMENT...

  Spotters may be needed this afternoon.

GENERAL STORM MOTION OF THE DAY:

  Moving toward the east to northeast at around 25 mph.

$$

LMZ740>745-210830-
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-
327 AM CDT Mon May 20 2024

This Hazardous Weather Outlook is for portions of the Illinois
nearshore waters of Lake Michigan and the Indiana nearshore
waters of Lake Michigan.

.DAY ONE...Today and Tonight.

Weather hazards expected...

  Elevated Thunderstorm Risk...with an associated:
     Limited Hail Risk...up to half dollar size.
     Limited Thunderstorm Wind Gust Risk...up to 50 knots.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Tuesday...
  Hazardous conditions for small craft are likely.
Tuesday night...
  Hazardous conditions for small craft are likely.
  Elevated Thunderstorm Risk with a:
    Limited Severe Thunderstorm Risk.
Friday through Sunday...
  Limited Thunderstorm Risk.

$$

- Izzi

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