Alert archive / Indiana / Porter County

Weather alerts in Porter County, Indiana, 2025

112 weather alerts in 2025, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Porter County and its neighbors

Each county as a circle sized by its count in 2025. Tap one for its archive.

Alerts
112
Warnings
15
Watches
16
Advisories
38
Busiest month
July22 alerts
Busiest day
March 14, 20254 alerts

Over time

By month

Warning verification

How often warnings here had a storm report inside them, and how much warning the reports had.

Porter County, 2025

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings7614%3087%32 min
Flash flood warnings20100%10%

Each office's whole area, 2025

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Chicago, IL: tornado warnings19668%2348%11 min
NWS Chicago, IL: severe thunderstorm warnings1379531%62886%25 min
NWS Chicago, IL: flash flood warnings341944%13078%56 min

An office's figures cover every county it serves, including across state lines.

Verified by the Iowa Environmental Mesonet's Cow, which matches each storm-based warning with the local storm reports inside its polygon while it was in force, within 15 km of its edge: a tornado warning counts as verified on a tornado report, a severe thunderstorm warning on hail of 1 inch or more, a gust of 58 mph or more, or wind damage, a flash flood warning on a flash flood report. The false alarm ratio is the share of warnings with no such report; "inside a warning" is the probability of detection, the share of reports that fell inside one; lead time runs from the warning's issue to each report inside it, counting zero for a report that came first. A warning with no report is not proof nothing happened: reports come from spotters, the public and damage surveys, and are thin where few people live.

The alerts

Every alert, in the order issued. Times are local, Central Time. Each opens its own page with the text, the map, the radar and the sounding.

IssuedProductOfficeLasted
Jan 18, 1:21 PM CSTCold Weather AdvisoryLOT46 hr
Jan 19, 12:58 PM CSTCold Weather AdvisoryLOT59 hr
Jan 30, 8:28 PM CSTDense Fog AdvisoryLOT13 hr
Jan 31, 1:07 AM CSTFlood WatchLOT14 hr
Feb 4, 2:21 PM CSTWinter Weather AdvisoryLOT40 hr
Feb 8, 2:00 AM CSTWinter Weather AdvisoryLOT16 hr
Feb 10, 1:15 PM CSTWinter Storm WatchLOT22 hr
Feb 11, 11:41 AM CSTWinter Weather AdvisoryLOT39 hr
Feb 27, 1:55 PM CSTWind AdvisoryLOT31 hr
Mar 4, 3:06 PM CSTWind AdvisoryLOT33 hr
Mar 4, 3:08 PM CSTLakeshore Flood AdvisoryLOT37 hr
Mar 5, 11:07 AM CSTAreal Flood AdvisoryLOT6 hr
Mar 13, 3:40 AM CDTHigh Wind WatchLOT35 hr
Mar 13, 3:40 AM CDTWind AdvisoryLOT51 hr
Mar 13, 10:36 AM CDTFire Weather WatchLOT24 hr
Mar 14, 4:11 AM CDTRed Flag WarningLOT20 hr
Mar 14, 2:26 PM CDTHigh Wind WarningLOT18 hr
Mar 14, 2:26 PM CDTWind AdvisoryLOT26 hr
Mar 14, 6:55 PM CDTSevere Thunderstorm WatchSPC8 hr
Mar 14, 11:57 PM CDTMesoscale DiscussionSPC63 min
Mar 15, 1:02 AM CDTSpecial Weather StatementLOT73 min
Mar 19, 2:57 AM CDTWind AdvisoryLOT28 hr
Mar 19, 5:27 PM CDTSevere Thunderstorm WarningLOT56 min
Mar 23, 3:15 AM CDTWind AdvisoryLOT21 hr
Mar 28, 10:33 AM CDTSpecial Weather StatementLOT27 min
Mar 30, 12:43 PM CDTMesoscale DiscussionSPC2 hr
Mar 30, 1:13 PM CDTTornado WatchSPC5 hr
Mar 30, 2:05 PM CDTMesoscale DiscussionSPC115 min
Mar 30, 2:28 PM CDTSevere Thunderstorm Warning Considerable damage threatLOT56 min
Apr 2, 3:17 PM CDTTornado WatchSPC7 hr
May 15, 5:15 PM CDTTornado WatchSPC4 hr
May 15, 8:13 PM CDTSevere Thunderstorm Warning Considerable damage threatLOT62 min
May 16, 10:56 AM CDTWind AdvisoryLOT10 hr
May 16, 5:32 PM CDTDust Storm WarningLOT94 min
May 16, 6:00 PM CDTDust Storm WarningLOT75 min
May 21, 3:09 AM CDTBeach Hazards StatementLOT46 hr
Jun 8, 5:35 PM CDTSpecial Weather StatementLOT40 min
Jun 18, 10:57 AM CDTMesoscale DiscussionSPC2 hr
Jun 18, 12:01 PM CDTTornado WatchSPC7 hr
Jun 18, 12:44 PM CDTMesoscale DiscussionSPC2 hr
Jun 18, 1:57 PM CDTSevere Thunderstorm WarningLOT63 min
Jun 19, 3:33 PM CDTSpecial Weather StatementLOT27 min
Jun 19, 3:52 PM CDTSpecial Weather StatementLOT23 min
Jun 19, 4:10 PM CDTSpecial Weather StatementLOT20 min
Jun 20, 3:50 AM CDTHeat AdvisoryLOT5 days
Jun 24, 12:36 PM CDTMesoscale DiscussionSPC114 min
Jun 26, 8:04 PM CDTSevere Thunderstorm WarningLOT37 min
Jul 5, 8:55 PM CDTBeach Hazards StatementLOT48 hr
Jul 8, 5:19 PM CDTAreal Flood AdvisoryLOT116 min
Jul 9, 2:55 AM CDTBeach Hazards StatementLOT31 hr
Jul 16, 12:37 PM CDTSevere Thunderstorm WatchSPC5 hr
Jul 16, 3:41 PM CDTBeach Hazards StatementLOT36 hr
Jul 16, 4:08 PM CDTSevere Thunderstorm WarningLOT67 min
Jul 16, 4:28 PM CDTMesoscale DiscussionSPC62 min
Jul 19, 2:43 PM CDTAreal Flood AdvisoryLOT3 hr
Jul 19, 4:23 PM CDTBeach Hazards StatementLOT41 hr
Jul 22, 3:21 AM CDTHeat AdvisoryLOT64 hr
Jul 24, 2:10 PM CDTMesoscale DiscussionSPC2 hr
Jul 24, 2:31 PM CDTSevere Thunderstorm WatchSPC5 hr
Jul 24, 3:42 PM CDTSpecial Weather StatementLOT33 min
Jul 24, 4:39 PM CDTMesoscale DiscussionSPC96 min
Jul 26, 11:27 AM CDTAreal Flood AdvisoryLOT2 hr
Jul 26, 12:37 PM CDTAreal Flood AdvisoryLOT113 min
Jul 27, 1:27 PM CDTHeat AdvisoryLOT31 hr
Jul 29, 3:28 PM CDTBeach Hazards StatementLOT3 days
Jul 30, 3:18 AM CDTFlood WatchLOT25 hr
Jul 30, 12:02 PM CDTMesoscale DiscussionSPC2 hr
Jul 30, 12:57 PM CDTAreal Flood AdvisoryLOT5 hr
Jul 30, 1:56 PM CDTFlash Flood WarningLOT3 hr
Aug 12, 2:44 PM CDTMesoscale DiscussionSPC2 hr
Aug 12, 3:57 PM CDTSpecial Weather StatementLOT48 min
Aug 12, 4:09 PM CDTAreal Flood AdvisoryLOT3 hr
Aug 16, 1:56 PM CDTSevere Thunderstorm WatchSPC5 hr
Aug 16, 2:34 PM CDTMesoscale DiscussionSPC86 min
Aug 16, 4:44 PM CDTMesoscale DiscussionSPC61 min
Aug 16, 6:45 PM CDTSevere Thunderstorm WarningLOT45 min
Aug 17, 1:21 AM CDTAreal Flood AdvisoryLOT3 hr
Aug 17, 2:04 AM CDTAreal Flood AdvisoryLOT3 hr
Aug 17, 5:16 AM CDTBeach Hazards StatementLOT34 hr
Aug 18, 2:21 PM CDTFlood WatchLOT13 hr
Aug 18, 5:34 PM CDTMesoscale DiscussionSPC86 min
Aug 18, 9:12 PM CDTFlash Flood WarningLOT2 hr
Aug 18, 11:33 PM CDTAreal Flood AdvisoryLOT13 hr
Aug 19, 4:18 AM CDTBeach Hazards StatementLOT57 hr
Aug 19, 10:53 AM CDTAreal Flood AdvisoryLOT6 hr
Aug 23, 3:20 AM CDTBeach Hazards StatementLOT4 days
Aug 27, 2:44 PM CDTBeach Hazards StatementLOT47 hr
Sep 3, 3:39 AM CDTBeach Hazards StatementLOT35 hr
Sep 4, 2:46 PM CDTBeach Hazards StatementLOT28 hr
Sep 5, 10:58 PM CDTBeach Hazards StatementLOT5 hr
Sep 13, 8:21 AM CDTSpecial Weather StatementLOT39 min
Sep 21, 6:22 PM CDTSpecial Weather StatementLOT38 min
Sep 23, 4:56 PM CDTBeach Hazards StatementLOT44 hr
Oct 8, 1:33 PM CDTFrost AdvisoryLOT18 hr
Oct 23, 3:07 AM CDTFrost AdvisoryLOT29 hr
Nov 8, 2:27 AM CSTWinter Storm WatchLOT24 hr
Nov 9, 2:24 AM CSTWinter Storm WarningLOT31 hr
Nov 9, 2:24 AM CSTWinter Weather AdvisoryLOT36 hr
Nov 9, 9:55 PM CSTMesoscale DiscussionSPC5 hr
Nov 10, 3:52 AM CSTMesoscale DiscussionSPC3 hr
Nov 10, 8:47 AM CSTMesoscale DiscussionSPC5 hr
Nov 25, 2:03 AM CSTWind AdvisoryLOT42 hr
Nov 27, 3:07 AM CSTWinter Storm WatchLOT32 hr
Nov 28, 2:03 AM CSTWinter Storm WarningLOT48 hr
Nov 30, 1:51 AM CSTWinter Weather AdvisoryLOT10 hr
Dec 1, 1:54 AM CSTWinter Weather AdvisoryLOT25 hr
Dec 6, 2:34 AM CSTWinter Weather AdvisoryLOT32 hr
Dec 10, 9:12 AM CSTSpecial Weather StatementLOT63 min
Dec 26, 5:19 AM CSTDense Fog AdvisoryLOT6 hr
Dec 27, 1:25 PM CSTWind AdvisoryLOT50 hr
Dec 28, 10:44 AM CSTMesoscale DiscussionSPC2 hr
Dec 28, 1:17 PM CSTAreal Flood AdvisoryLOT5 hr

By product

Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force nowTornadoes on recordForecastThe radar archive20242026

Sources

National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Warning verification from the Mesonet's Cow. Rebuilt daily.