2 products issued by NWS for: Saint John IN
Hazardous Weather Outlook
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
237 PM CDT Tue Jul 15 2025
ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-161945-
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-
237 PM CDT Tue Jul 15 2025 /337 PM EDT Tue Jul 15 2025/
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 thunderstorms will continue through this evening,
especially south of I-80. No severe weather is expected.
.DAYS TWO THROUGH SEVEN...Wednesday through Monday.
Wednesday...
Elevated Thunderstorm Risk...with an associated:
Level 2 of 5 Severe Thunderstorm Risk.
Level 2 of 4 Flash Flooding Risk.
Limited Excessive Heat Risk.
Thursday...
Limited Flooding Risk.
Limited Thunderstorm Risk.
High Swim Risk Lake Michigan Beaches.
Friday...
High Swim Risk Lake Michigan Beaches.
Saturday through Monday...
Limited to Elevated Flooding Risk.
Limited to Elevated Thunderstorm Risk.
DISCUSSION...
Scattered severe storms are possible Wednesday afternoon with
damaging winds and damaging hail as the main threats. Flash
flooding may also occur where thunderstorms train.
High waves will cause dangerous swimming conditions at Lake
Michigan beaches Thursday through Friday.
There will be periodic bouts of showers and thunderstorms
Saturday through Monday. Any storm during this period may be
severe with damaging winds and flash flooding.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonight.
GENERAL STORM MOTION OF THE DAY:
Moving toward the north at 10 mph.
$$
Air Quality Alert
INZ001-002-010-011-160500- Lake IN-Porter-Newton-Jasper- Including the cities of Gary, Hammond, Merrillville, Portage, Valparaiso, Chesterton, Roselawn, Kentland, Morocco, Rensselaer, and DeMotte 1142 AM CDT Tue Jul 15 2025 ...AIR QUALITY ALERT IN EFFECT UNTIL MIDNIGHT CDT WEDNESDAY NIGHT... An Air Quality Action Day has been forecast for Northwest Indiana for elevated ozone levels and is in effect until midnight CDT Wednesday night. Ozone Levels are expected to be at unhealthy levels for sensitive groups. For additional information...please visit the IDEM SMOG Watch web site at www.SmogWatch.IN.gov or the EPA AIRNOW web site at www.airnow.gov and click on Indiana. $$