One product issued by NWS for: Marengo IL
Hazardous Weather Outlook
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
214 PM CDT Sun Aug 16 2026
ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-171915-
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-
214 PM CDT Sun Aug 16 2026 /314 PM EDT Sun Aug 16 2026/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Tonight.
Weather hazards expected...
Limited Thunderstorm Risk.
DISCUSSION...
Isolated to scattered thunderstorms are expected ahead of a cold
front into this evening. Torrential downpours are expected to
accompany these storms. A few storms may also produce locally
gusty winds to 50 mph.
.DAYS TWO THROUGH SEVEN...Monday through Saturday.
Tuesday...
Elevated Flooding Risk.
Limited Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
Wednesday...
Limited Flooding Risk.
Limited Thunderstorm Risk.
DISCUSSION...
Thunderstorm chances return late Tuesday into Wednesday, some
could be strong to severe and produce torrential rainfall which
may lead to flooding.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonight.
GENERAL STORM MOTION OF THE DAY:
Moving toward the east-southeast around 25 mph
$$