Active Weather Alerts
Severe Thunderstorm Warning
Issued: 9:39 PM Jul. 27, 2026 – National Weather Service
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM CDT FOR PORTER AND LAKE COUNTIES... At 439 PM CDT, severe thunderstorms were located along a line extending from 6 miles east of Hyde Park to 7 miles northeast of Whiting to 7 miles northeast of East Chicago to near Burns Harbor to near Town of Pines to near Three Oaks, moving south at 35 mph. HAZARD...Ping pong ball size hail and 60 mph wind gusts. SOURCE...Radar indicated. IMPACT...People and animals outdoors will be injured. Expect hail damage to roofs, siding, windows, and vehicles. Expect wind damage to roofs, siding, and trees. Locations impacted include... Hammond, Gary, Portage, Merrillville, Valparaiso, East Chicago, Schererville, Hobart, Crown Point, Highland, Munster, Chesterton, Cedar Lake, Lowell, Hebron, Griffith, Dyer, St. John, Lake Station, Lakes of the Four Seasons, South Haven, Whiting, Porter, Winfield, and New Chicago. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && HAIL THREAT...RADAR INDICATED; MAX HAIL SIZE...1.50 IN; WIND THREAT...RADAR INDICATED; MAX WIND GUST...60 MPH
Special Marine Warning
Issued: 8:39 PM Jul. 27, 2026 – National Weather Service
The National Weather Service in Chicago has issued a * Special Marine Warning for... Nearshore Waters from Wilmette Harbor to Calumet Harbor... Nearshore Waters from Calumet Harbor to Michigan City... Open Waters from Wilmette Harbor to Michigan City out to Mid Lake... * Until 545 PM CDT. * At 338 PM CDT, strong thunderstorms were located along a line extending from near Waukegan Harbor to 29 nm northwest of St. Joseph Light, moving south at 30 knots. HAZARD...Wind gusts to nearly 50 knots and small hail. SOURCE...Radar. IMPACT...Small craft could be damaged in briefly higher winds and suddenly higher waves. * Locations impacted include... Harrison-Dever Crib, Wilmette Harbor, 31st Street Harbor, Monroe Harbor, Burns Harbor, Calumet Harbor, Indiana Harbor, Montrose Harbor, Burnham Harbor, Hammond Marina, Jackson Park Harbor, and Belmont Harbor. PRECAUTIONARY/PREPAREDNESS ACTIONS... Move to safe harbor until hazardous weather passes. Move to safe harbor immediately as gusty winds and high waves are expected. && HAIL...<.75IN; WIND...49KTS
River Flood Warning
Issued: 8:09 PM Jul. 27, 2026 – National Weather Service
...FLOOD WARNING IN EFFECT UNTIL EARLY TOMORROW AFTERNOON... * WHAT...Minor flooding is forecast. * WHERE...Little Calumet River from IN-912 in Hammond downstream to confluence with Thorn Creek in South Holland, including the Munster (Hohman Avenue) gauge. * WHEN...Until early tomorrow afternoon. * IMPACTS...At 12.5 feet, Most areas outside of the levee-protected area are inundated in Hammond and Munster. * ADDITIONAL DETAILS... - At 2:00 PM CDT Monday the stage was 9.3 feet. - The river has begun rising quickly due to earlier heavy rainfall. - Forecast...The river is expected to rise above flood stage by this evening and crest near 12.5 feet late this evening. - Flood stage is 12.0 feet. - http://www.weather.gov/safety/flood &&
Severe Thunderstorm Watch
Issued: 7:22 PM Jul. 27, 2026 – National Weather Service
THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH 520 IN EFFECT UNTIL 7 PM CDT /8 PM EDT/ THIS EVENING FOR THE FOLLOWING AREAS IN ILLINOIS THIS WATCH INCLUDES 6 COUNTIES IN EAST CENTRAL ILLINOIS IROQUOIS IN NORTHEAST ILLINOIS COOK DUPAGE KANKAKEE LAKE IL WILL IN INDIANA THIS WATCH INCLUDES 5 COUNTIES IN NORTHWEST INDIANA BENTON JASPER LAKE IN NEWTON PORTER THIS INCLUDES THE CITIES OF BOLINGBROOK, BOURBONNAIS, BUFFALO GROVE, CAROL STREAM, CHESTERTON, CHICAGO, DEMOTTE, DOWNERS GROVE, EVANSTON, FOWLER, GARY, GILMAN, GURNEE, HAMMOND, JOLIET, KANKAKEE, KENTLAND, LEMONT, LOMBARD, MERRILLVILLE, MOROCCO, MUNDELEIN, NAPERVILLE, OAK LAWN, ORLAND PARK, OXFORD, PARK FOREST, PORTAGE, RENSSELAER, ROSELAWN, SCHAUMBURG, VALPARAISO, WATSEKA, WAUKEGAN, WHEATON, AND WILMINGTON.
Severe Thunderstorm Watch
Issued: 7:22 PM Jul. 27, 2026 – National Weather Service
THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH 520 IN EFFECT UNTIL 7 PM CDT THIS EVENING FOR THE FOLLOWING AREAS THIS WATCH INCLUDES THE FOLLOWING ADJACENT COASTAL WATERS 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 LAKE MICHIGAN FROM WINTHROP HARBOR TO WILMETTE HARBOR IL 5NM OFFSHORE TO MID LAKE LAKE MICHIGAN FROM WILMETTE HARBOR IL TO MICHIGAN CITY IN 5NM OFFSHORE TO MID LAKE
Small Craft Advisory
Issued: 7:12 PM Jul. 27, 2026 – National Weather Service
...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 1 AM TUESDAY TO 7 AM CDT WEDNESDAY... * WHAT...North winds to 30 kt and significant waves to 9 ft occasionally to 12 ft expected. * WHERE...Illinois and Indiana nearshore from Winthrop Harbor IL to Michigan City IN. * WHEN...From 1 AM Tuesday to 7 AM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. &&
Flash Flood Warning
Issued: 6:57 PM Jul. 27, 2026 – National Weather Service
The National Weather Service in Chicago has issued a * Flash Flood Warning for... Lake IN County in northwestern Indiana... * Until 600 PM CDT. * At 157 PM CDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 1 and 2 inches of rain have fallen. Flash flooding is ongoing or expected to begin shortly. HAZARD...Flash flooding. SOURCE...Radar and automated gauges. IMPACT...Rapid-onset flooding of creeks, streams, drainage ditches, streets, underpasses, low-lying areas, and other poor drainage areas. * Some locations that will experience flash flooding include... Hammond, Gary, Portage, Merrillville, East Chicago, Schererville, Hobart, Crown Point, Highland, Munster, Cedar Lake, Lowell, Griffith, Dyer, St. John, Lake Station, Lakes of the Four Seasons, Whiting, Winfield and New Chicago. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Warning means rapid-onset flooding is imminent or may already be occurring. Persons along creeks, drainage ditches, and other waterways should take immediate precautions to protect life and property. && FLASH FLOOD...RADAR INDICATED
Beach Hazard Statement
Issued: 4:20 PM Jul. 27, 2026 – National Weather Service
...BEACH HAZARDS STATEMENT REMAINS IN EFFECT FROM LATE TONIGHT THROUGH WEDNESDAY MORNING... * WHAT...High wave action and dangerous currents expected at Lake Michigan beaches. Waves 5 to 9 ft expected. * WHERE...In Illinois, Lake, Northern Cook and Central Cook Counties. In Indiana, Lake and Porter Counties. * WHEN...From late tonight through Wednesday morning. * IMPACTS...Swimming conditions will be life threatening, especially for inexperienced swimmers. For information on swim advisories or bans at Chicago beaches: www. cpdbeaches. com. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain out of the water to avoid dangerous swimming conditions and do not venture out onto piers, jetties, breakwalls, or other shoreline structures. &&
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