Alert archive / Indiana / Porter County

Weather alerts in Porter County, Indiana, 2018

110 weather alerts in 2018, 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 2018. Tap one for its archive.

Alerts
110
Warnings
17
Watches
12
Advisories
43
Busiest month
May17 alerts
Busiest day
May 3, 20185 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, 2018

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings7529%757%13 min
Flash flood warnings00

Each office's whole area, 2018

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Chicago, IL: tornado warnings3167%933%0 min
NWS Chicago, IL: severe thunderstorm warnings743849%15760%22 min
NWS Chicago, IL: flash flood warnings12833%3269%74 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 3, 2:57 AM CSTWinter Weather AdvisoryLOT45 hr
Jan 7, 2:53 AM CSTWinter Weather AdvisoryLOT27 hr
Jan 7, 1:49 PM CSTMesoscale DiscussionSPC4 hr
Jan 7, 2:00 PM CSTMesoscale DiscussionSPC4 hr
Jan 7, 6:16 PM CSTMesoscale DiscussionSPC6 hr
Jan 8, 9:53 PM CSTDense Fog AdvisoryLOT14 hr
Jan 10, 8:56 AM CSTDense Fog AdvisoryLOT10 hr
Jan 11, 3:58 AM CSTWinter Weather AdvisoryLOT32 hr
Jan 12, 11:25 AM CSTLakeshore Flood AdvisoryLOT17 hr
Jan 14, 1:45 PM CSTWinter Weather AdvisoryLOT25 hr
Jan 15, 3:03 AM CSTWinter Storm WatchLOT31 hr
Jan 16, 3:37 AM CSTWinter Weather AdvisoryLOT20 hr
Jan 16, 8:55 AM CSTSpecial Weather StatementLOT35 min
Jan 21, 3:52 AM CSTDense Fog AdvisoryLOT26 hr
Jan 24, 4:49 AM CSTWinter Weather AdvisoryLOT7 hr
Feb 3, 3:02 AM CSTWinter Weather AdvisoryLOT39 hr
Feb 4, 2:44 PM CSTWinter Weather AdvisoryLOT33 hr
Feb 7, 3:32 AM CSTWinter Storm WatchLOT23 hr
Feb 8, 2:54 AM CSTWinter Storm WarningLOT42 hr
Feb 9, 3:08 AM CSTMesoscale DiscussionSPC6 hr
Feb 10, 2:37 PM CSTWinter Weather AdvisoryLOT21 hr
Feb 14, 5:14 PM CSTDense Fog AdvisoryLOT25 hr
Feb 18, 3:36 AM CSTDense Fog AdvisoryLOT6 hr
Feb 18, 8:00 PM CSTFlood WatchLOT55 hr
Feb 19, 10:37 AM CSTRiver Flood WarningLOT31 days
Feb 19, 10:37 AM CSTRiver Flood WarningLOT30 days
Feb 19, 10:44 PM CSTAreal Flood WarningLOT12 hr
Feb 20, 10:45 AM CSTAreal Flood WarningLOT24 hr
Feb 20, 2:26 PM CSTSpecial Weather StatementLOT64 min
Feb 20, 3:31 PM CSTWinter Weather AdvisoryLOT15 hr
Mar 16, 3:07 AM CDTWinter Weather AdvisoryLOT29 hr
Mar 17, 3:59 AM CDTMesoscale DiscussionSPC4 hr
Mar 31, 5:38 AM CDTWind AdvisoryLOT11 hr
Apr 16, 10:07 AM CDTRiver Flood AdvisoryLOT3 days
Apr 16, 10:07 AM CDTRiver Flood AdvisoryLOT4 days
Apr 30, 4:35 PM CDTRed Flag WarningLOT26 hr
May 2, 3:56 PM CDTSevere Thunderstorm WatchSPC9 hr
May 2, 5:29 PM CDTMesoscale DiscussionSPC91 min
May 2, 5:46 PM CDTSevere Thunderstorm WarningLOT44 min
May 2, 7:21 PM CDTMesoscale DiscussionSPC84 min
May 2, 8:09 PM CDTSevere Thunderstorm WarningLOT51 min
May 2, 8:51 PM CDTFlash Flood WatchLOT11 hr
May 2, 10:51 PM CDTSevere Thunderstorm WatchSPC4 hr
May 3, 1:57 AM CDTMesoscale DiscussionSPC93 min
May 9, 6:18 PM CDTSevere Thunderstorm WarningLOT42 min
May 9, 6:34 PM CDTSevere Thunderstorm WarningLOT26 min
May 12, 12:34 PM CDTFlash Flood WatchLOT15 hr
May 14, 7:27 AM CDTSpecial Weather StatementLOT33 min
May 14, 6:36 PM CDTMesoscale DiscussionSPC84 min
May 14, 7:36 PM CDTSpecial Weather StatementLOT24 min
May 21, 9:52 PM CDTDense Fog AdvisoryLOT12 hr
May 22, 11:58 PM CDTDense Fog AdvisoryLOT9 hr
May 31, 3:24 PM CDTBeach Hazards StatementLOT43 hr
Jun 5, 2:26 PM CDTBeach Hazards StatementLOT14 hr
Jun 9, 5:23 PM CDTDense Fog AdvisoryLOT10 hr
Jun 16, 9:21 AM CDTHeat AdvisoryLOT58 hr
Jun 19, 2:54 PM CDTAreal Flood AdvisoryLOT3 hr
Jun 21, 3:28 AM CDTFlash Flood WatchLOT34 hr
Jun 21, 4:07 PM CDTRiver Flood AdvisoryLOT6 hr
Jun 21, 9:34 PM CDTRiver Flood AdvisoryLOT13 hr
Jun 21, 9:46 PM CDTRiver Flood WarningLOT6 days
Jun 27, 3:09 PM CDTExcessive Heat WatchLOT36 hr
Jun 28, 2:44 PM CDTExcessive Heat WarningLOT3 days
Jul 1, 12:58 PM CDTSevere Thunderstorm WatchSPC7 hr
Jul 1, 3:37 PM CDTMesoscale DiscussionSPC83 min
Jul 1, 6:08 PM CDTSpecial Weather StatementLOT37 min
Jul 1, 6:51 PM CDTMesoscale DiscussionSPC114 min
Jul 3, 2:38 PM CDTHeat AdvisoryLOT49 hr
Jul 4, 8:30 PM CDTSpecial Weather StatementLOT30 min
Jul 4, 9:51 PM CDTAreal Flood AdvisoryLOT3 hr
Jul 5, 3:22 PM CDTSevere Thunderstorm WarningLOT53 min
Jul 5, 3:43 PM CDTBeach Hazards StatementLOT33 hr
Jul 16, 1:26 PM CDTAreal Flood AdvisoryLOT3 hr
Jul 16, 3:18 PM CDTBeach Hazards StatementLOT39 hr
Jul 17, 3:59 AM CDTDense Fog AdvisoryLOT3 hr
Jul 20, 4:07 PM CDTBeach Hazards StatementLOT60 hr
Jul 23, 9:17 AM CDTBeach Hazards StatementLOT13 hr
Jul 27, 3:03 AM CDTBeach Hazards StatementLOT10 hr
Aug 6, 5:19 PM CDTSevere Thunderstorm WarningLOT23 min
Aug 6, 5:21 PM CDTMesoscale DiscussionSPC114 min
Aug 19, 4:21 AM CDTDense Fog AdvisoryLOT5 hr
Aug 20, 3:37 PM CDTBeach Hazards StatementLOT51 hr
Aug 21, 12:30 AM CDTAreal Flood AdvisoryLOT3 hr
Aug 26, 2:56 PM CDTHeat AdvisoryLOT28 hr
Aug 28, 4:45 PM CDTBeach Hazards StatementLOT34 hr
Aug 28, 7:37 PM CDTSevere Thunderstorm WatchSPC4 hr
Aug 28, 9:54 PM CDTMesoscale DiscussionSPC66 min
Aug 29, 5:56 AM CDTSpecial Weather StatementLOT64 min
Sep 3, 3:43 PM CDTSpecial Weather StatementLOT47 min
Sep 5, 3:23 AM CDTBeach Hazards StatementLOT5 days
Sep 6, 3:51 PM CDTBeach Hazards StatementLOT11 hr
Sep 7, 3:07 AM CDTBeach Hazards StatementLOT3 days
Sep 11, 4:36 AM CDTDense Fog AdvisoryLOT4 hr
Sep 18, 8:39 AM CDTBeach Hazards StatementLOT7 hr
Sep 20, 3:16 PM CDTMesoscale DiscussionSPC89 min
Sep 20, 3:44 PM CDTBeach Hazards StatementLOT51 hr
Sep 25, 1:36 PM CDTSevere Thunderstorm WatchSPC8 hr
Sep 25, 2:49 PM CDTBeach Hazards StatementLOT25 hr
Sep 25, 6:47 PM CDTSevere Thunderstorm WarningLOT28 min
Sep 28, 4:06 AM CDTBeach Hazards StatementLOT27 hr
Oct 11, 3:23 AM CDTFrost AdvisoryLOT28 hr
Oct 12, 2:37 PM CDTFrost AdvisoryLOT18 hr
Oct 15, 1:14 PM CDTFreeze WarningLOT19 hr
Oct 20, 9:47 AM CDTWind AdvisoryLOT8 hr
Nov 24, 1:44 PM CSTWinter Weather AdvisoryLOT46 hr
Nov 24, 8:05 PM CSTLakeshore Flood WarningLOT40 hr
Nov 30, 8:09 PM CSTDense Fog AdvisoryLOT10 hr
Dec 14, 4:10 PM CSTDense Fog AdvisoryLOT18 hr
Dec 27, 12:22 PM CSTWind AdvisoryLOT4 hr
Dec 29, 8:18 AM CSTWinter Weather AdvisoryLOT3 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 archive20172019

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.