District 1 SKYWARN spotters give the National Weather Service real-time ground truth during severe weather across Northwest Indiana.
207 PM CDT Mon Jul 13 2026 / Chicago/Romeoville IL
Spotter activation will not be necessary through tonight.
Heat and humidity will increase this week with peak heat index
values around 100 degrees Tuesday and Thursday and up to 105
degrees on Wednesday. Lake breezes may provide slight relief along
the immediate Lake Michigan shore each afternoon.
Heat Advisory issued July 13 at 12:57PM EDT until July 14 at 8:00PM EDT by NWS Northern Indiana
* WHAT...Heat index values up to around 100 expected. * WHERE...Portions of northern Indiana, southwest Michigan, and northwest Ohio. * WHEN...From noon EDT /11 AM CDT/ to 8 PM EDT /7 PM CDT/ Tuesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.
Air Quality Alert issued July 13 at 12:50PM EDT by NWS Northern Indiana
The officials at the Indiana Department of Environmental Management have declared an Air Quality Action Day, in effect for Today, Monday, July 13th and Tuesday, July 14th. An Air Quality Action Day for Ozone has been issued. Ozone levels are expected to be in the Unhealthy for Sensitive Groups range. Active children and adults, and people with respiratory disease, such as asthma should limit prolonged outdoor exposure. Here are some recommended actions that the public can take: * Walk, bike, carpool or use public transportation. * Avoid using the drive-through and combine errands into one trip. * Avoid refueling your vehicle or using gasoline-powered lawn equipment until after 7pm. * Turn off your engine when idling for more than 30 seconds. * Conserve energy by turning off lights or setting the air conditioner to 75 degrees or above. For additional information, please visit the IDEM Smog page at: http://www.in.gov/idem/airmonitoring/smogwatch/
Air Quality Alert issued July 13 at 11:44AM CDT by NWS Chicago IL
The officials at the Indiana Department of Environmental Management have declared an Air Quality Action Day, IN EFFECT UNTIL MIDNIGHT CDT TUESDAY NIGHT. An Air Quality Action Day for ozone has been issued. Ozone levels are expected to be in the Unhealthy for Sensitive Groups range. Active children and adults, and people with respiratory disease, such as asthma should limit prolonged outdoor exposure. Here are some recommended actions that the public can take: * Walk, bike, carpool or use public transportation. * Avoid using the drive-through and combine errands into one trip. * Avoid refueling your vehicle or using gasoline-powered lawn equipment until after 7pm. * Turn off your engine when idling for more than 30 seconds. * Conserve energy by turning off lights or setting the air conditioner to 75 degrees or above. For additional information, please visit the IDEM Smog page at: http://www.in.gov/idem/airmonitoring/smogwatch/
Air Quality Alert issued July 13 at 11:26AM CDT by NWS Chicago IL
The officials at the Indiana Department of Environmental Management have declared an Air Quality Action Day, IN EFFECT UNTIL MIDNIGHT CDT TUESDAY NIGHT. An Air Quality Action Day for ozone has been issued. Ozone levels are expected to be in the Unhealthy for Sensitive Groups range. Active children and adults, and people with respiratory disease, such as asthma should limit prolonged outdoor exposure. Here are some recommended actions that the public can take: * Walk, bike, carpool or use public transportation. * Avoid using the drive-through and combine errands into one trip. * Avoid refueling your vehicle or using gasoline-powered lawn equipment until after 7pm. * Turn off your engine when idling for more than 30 seconds. * Conserve energy by turning off lights or setting the air conditioner to 75 degrees or above. For additional information, please visit the IDEM Smog page at: http://www.in.gov/idem/airmonitoring/smogwatch/
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