Alert archive / Indiana / Lake County

Weather alerts in Lake County, Indiana, 2017

148 weather alerts in 2017, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Lake County and its neighbors

Each county as a circle sized by its count in 2017. Tap one for its archive.

Alerts
148
Warnings
32
Watches
16
Advisories
43
Busiest month
July26 alerts
Busiest day
March 1, 20179 alerts

Over time

By month

Warning verification

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

Lake County, 2017

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings10550%1070%6 min
Flash flood warnings00

Each office's whole area, 2017

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Chicago, IL: tornado warnings14657%1776%17 min
NWS Chicago, IL: severe thunderstorm warnings1587652%31072%21 min
NWS Chicago, IL: flash flood warnings12650%2781%129 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 2, 6:30 PM CSTDense Fog AdvisoryLOT17 hr
Jan 9, 7:12 AM CSTRiver Flood WarningLOT3 days
Jan 10, 3:38 AM CSTWind AdvisoryLOT17 hr
Jan 10, 11:55 AM CSTHigh Wind WarningLOT9 hr
Jan 11, 10:02 AM CSTFreezing Rain AdvisoryLOT23 hr
Jan 11, 1:15 PM CSTDense Fog AdvisoryLOT7 hr
Jan 12, 3:05 AM CSTMesoscale DiscussionSPC6 hr
Jan 13, 10:19 AM CSTRiver Flood WarningLOT17 days
Jan 16, 12:13 PM CSTDense Fog AdvisoryLOT17 hr
Jan 20, 4:29 PM CSTDense Fog AdvisoryLOT19 hr
Jan 21, 9:08 PM CSTDense Fog AdvisoryLOT15 hr
Jan 22, 2:41 PM CSTDense Fog AdvisoryLOT15 hr
Feb 6, 7:07 PM CSTDense Fog AdvisoryLOT19 hr
Feb 9, 10:43 AM CSTRiver Flood WarningLOT4 days
Feb 12, 9:45 AM CSTRiver Flood AdvisoryLOT29 hr
Feb 20, 3:41 AM CSTDense Fog AdvisoryLOT6 hr
Feb 21, 11:34 PM CSTDense Fog AdvisoryLOT11 hr
Feb 23, 7:02 AM CSTDense Fog AdvisoryLOT3 hr
Feb 28, 2:03 PM CSTMesoscale DiscussionSPC2 hr
Feb 28, 2:57 PM CSTTornado WatchSPC7 hr
Feb 28, 5:24 PM CSTMesoscale DiscussionSPC96 min
Feb 28, 6:31 PM CSTSevere Thunderstorm WarningLOT59 min
Feb 28, 8:51 PM CSTAreal Flood AdvisoryLOT6 hr
Feb 28, 8:57 PM CSTSevere Thunderstorm WarningLOT37 min
Feb 28, 9:09 PM CSTAreal Flood WarningLOT6 hr
Feb 28, 9:51 PM CSTTornado WatchSPC6 hr
Feb 28, 11:20 PM CSTSpecial Weather StatementLOT25 min
Feb 28, 11:25 PM CSTRiver Flood WarningLOT29 hr
Feb 28, 11:32 PM CSTSevere Thunderstorm WarningLOT28 min
Mar 1, 12:21 AM CSTRiver Flood WarningLOT32 hr
Mar 7, 1:49 AM CSTSpecial Weather StatementLOT41 min
Mar 7, 1:53 AM CSTMesoscale DiscussionSPC97 min
Mar 7, 7:38 PM CSTWind AdvisoryLOT22 hr
Mar 8, 9:35 AM CSTRed Flag WarningLOT7 hr
Mar 8, 11:23 AM CSTHigh Wind WarningLOT6 hr
Mar 11, 3:43 PM CSTWinter Weather AdvisoryLOT44 hr
Mar 13, 10:22 AM CDTLake Effect Snow WarningLOT48 hr
Mar 13, 2:52 PM CDTLake Effect Snow AdvisoryLOT23 hr
Mar 27, 9:49 AM CDTRiver Flood WatchLOT5 days
Mar 28, 11:02 AM CDTRiver Flood WarningLOT22 days
Mar 28, 7:17 PM CDTDense Fog AdvisoryLOT14 hr
Mar 30, 5:49 AM CDTAreal Flood AdvisoryLOT3 hr
Mar 30, 7:58 AM CDTRiver Flood WarningLOT24 hr
Mar 31, 9:22 AM CDTRiver Flood AdvisoryLOT36 hr
Apr 4, 3:58 AM CDTLakeshore Flood WatchLOT24 hr
Apr 4, 3:21 PM CDTHigh Wind WatchLOT24 hr
Apr 5, 4:07 AM CDTLakeshore Flood WarningLOT45 hr
Apr 5, 3:25 PM CDTHigh Wind WarningLOT26 hr
Apr 5, 3:25 PM CDTWind AdvisoryLOT23 hr
Apr 6, 11:05 AM CDTRiver Flood AdvisoryLOT36 hr
Apr 10, 11:57 AM CDTMesoscale DiscussionSPC3 hr
Apr 10, 1:10 PM CDTSevere Thunderstorm WarningLOT29 min
Apr 10, 1:48 PM CDTSevere Thunderstorm WatchSPC8 hr
Apr 10, 3:25 PM CDTMesoscale DiscussionSPC2 hr
Apr 10, 6:22 PM CDTMesoscale DiscussionSPC53 min
Apr 10, 8:27 PM CDTSevere Thunderstorm WarningLOT37 min
Apr 10, 8:58 PM CDTMesoscale DiscussionSPC62 min
Apr 11, 3:42 AM CDTDense Fog AdvisoryLOT3 hr
Apr 28, 10:47 AM CDTRiver Flood WarningLOT5 days
Apr 28, 12:09 PM CDTRiver Flood WatchLOT47 hr
Apr 28, 12:09 PM CDTRiver Flood WatchLOT5 days
Apr 28, 3:05 PM CDTFlash Flood WatchLOT61 hr
Apr 29, 7:04 PM CDTAreal Flood AdvisoryLOT3 hr
Apr 30, 10:17 AM CDTRiver Flood WarningLOT55 hr
Apr 30, 11:22 AM CDTRiver Flood WarningLOT16 days
May 6, 2:39 PM CDTFrost AdvisoryLOT17 hr
May 7, 3:04 AM CDTFrost AdvisoryLOT27 hr
May 17, 3:30 AM CDTWind AdvisoryLOT19 hr
May 21, 10:41 AM CDTRiver Flood WarningLOT10 days
May 24, 10:30 AM CDTBeach Hazards StatementLOT36 hr
May 26, 6:45 PM CDTSpecial Weather StatementLOT45 min
Jun 4, 3:42 PM CDTBeach Hazards StatementLOT60 hr
Jun 4, 4:32 PM CDTSpecial Weather StatementLOT43 min
Jun 9, 9:33 AM CDTBeach Hazards StatementLOT7 hr
Jun 13, 2:25 PM CDTMesoscale DiscussionSPC3 hr
Jun 14, 12:40 PM CDTSevere Thunderstorm WatchSPC7 hr
Jun 14, 3:02 PM CDTMesoscale DiscussionSPC118 min
Jun 14, 4:59 PM CDTMesoscale DiscussionSPC91 min
Jun 17, 2:44 PM CDTMesoscale DiscussionSPC2 hr
Jun 17, 8:17 PM CDTMesoscale DiscussionSPC58 min
Jun 19, 12:44 PM CDTMesoscale DiscussionSPC3 hr
Jun 20, 2:05 PM CDTMesoscale DiscussionSPC2 hr
Jun 20, 2:47 PM CDTSpecial Weather StatementLOT13 min
Jun 20, 3:02 PM CDTSevere Thunderstorm WarningLOT28 min
Jun 20, 5:41 PM CDTBeach Hazards StatementLOT4 hr
Jun 23, 6:08 AM CDTSevere Thunderstorm WarningLOT23 min
Jun 25, 4:15 PM CDTBeach Hazards StatementLOT36 hr
Jul 2, 6:36 PM CDTSpecial Weather StatementLOT24 min
Jul 2, 6:56 PM CDTSpecial Weather StatementLOT34 min
Jul 7, 11:49 AM CDTSevere Thunderstorm WarningLOT41 min
Jul 7, 1:13 PM CDTSevere Thunderstorm WarningLOT47 min
Jul 8, 6:58 AM CDTBeach Hazards StatementLOT8 hr
Jul 10, 3:58 PM CDTSevere Thunderstorm WatchSPC7 hr
Jul 10, 6:18 PM CDTMesoscale DiscussionSPC87 min
Jul 12, 8:33 AM CDTMesoscale DiscussionSPC117 min
Jul 12, 2:32 PM CDTFlash Flood WatchLOT12 hr
Jul 12, 11:32 PM CDTAreal Flood AdvisoryLOT4 hr
Jul 14, 10:32 AM CDTBeach Hazards StatementLOT10 hr
Jul 15, 3:36 PM CDTBeach Hazards StatementLOT39 hr
Jul 16, 3:31 AM CDTSpecial Weather StatementLOT44 min
Jul 19, 5:45 PM CDTSevere Thunderstorm WatchSPC6 hr
Jul 19, 9:55 PM CDTSpecial Weather StatementLOT35 min
Jul 20, 7:14 AM CDTAreal Flood AdvisoryLOT2 hr
Jul 21, 4:52 PM CDTSevere Thunderstorm WatchSPC9 hr
Jul 21, 6:28 PM CDTMesoscale DiscussionSPC92 min
Jul 21, 8:35 PM CDTMesoscale DiscussionSPC115 min
Jul 21, 11:11 PM CDTAreal Flood AdvisoryLOT3 hr
Jul 21, 11:23 PM CDTMesoscale DiscussionSPC67 min
Jul 22, 3:38 AM CDTRiver Flood WatchLOT24 hr
Jul 22, 9:46 PM CDTRiver Flood WarningLOT5 days
Jul 23, 1:03 PM CDTMesoscale DiscussionSPC2 hr
Jul 23, 2:55 PM CDTBeach Hazards StatementLOT31 hr
Jul 27, 3:29 AM CDTBeach Hazards StatementLOT66 hr
Aug 3, 1:31 PM CDTSpecial Weather StatementLOT59 min
Aug 3, 3:47 PM CDTSpecial Weather StatementLOT28 min
Aug 3, 4:04 PM CDTBeach Hazards StatementLOT37 hr
Aug 3, 9:05 PM CDTSpecial Weather StatementLOT25 min
Aug 6, 3:52 PM CDTBeach Hazards StatementLOT36 hr
Aug 10, 5:31 PM CDTMesoscale DiscussionSPC89 min
Aug 11, 10:21 AM CDTBeach Hazards StatementLOT36 hr
Aug 21, 3:22 PM CDTBeach Hazards StatementLOT53 hr
Aug 24, 3:25 PM CDTBeach Hazards StatementLOT6 hr
Aug 30, 3:47 AM CDTBeach Hazards StatementLOT66 hr
Aug 30, 4:30 AM CDTDense Fog AdvisoryLOT5 hr
Sep 3, 3:25 PM CDTBeach Hazards StatementLOT4 days
Sep 14, 1:14 AM CDTDense Fog AdvisoryLOT9 hr
Sep 20, 12:31 AM CDTDense Fog AdvisoryLOT8 hr
Sep 26, 3:56 PM CDTBeach Hazards StatementLOT36 hr
Sep 28, 4:11 AM CDTBeach Hazards StatementLOT6 hr
Sep 28, 3:25 PM CDTBeach Hazards StatementLOT43 hr
Oct 14, 9:16 AM CDTRiver Flood AdvisoryLOT36 hr
Oct 14, 6:01 PM CDTMesoscale DiscussionSPC89 min
Oct 14, 8:55 PM CDTSevere Thunderstorm WarningLOT27 min
Oct 14, 9:04 PM CDTMesoscale DiscussionSPC86 min
Oct 14, 11:36 PM CDTSpecial Weather StatementLOT39 min
Oct 25, 3:00 AM CDTFrost AdvisoryLOT29 hr
Oct 27, 3:29 PM CDTFreeze WarningLOT42 hr
Nov 4, 11:33 PM CDTDense Fog AdvisoryLOT10 hr
Nov 18, 3:47 AM CSTLakeshore Flood AdvisoryLOT22 hr
Nov 18, 9:51 AM CSTRiver Flood WatchLOT5 days
Nov 19, 9:17 AM CSTRiver Flood WarningLOT7 days
Dec 4, 3:10 AM CSTWind AdvisoryLOT39 hr
Dec 9, 3:51 AM CSTLakeshore Flood AdvisoryLOT17 hr
Dec 13, 8:44 PM CSTWinter Weather AdvisoryLOT14 hr
Dec 23, 3:21 AM CSTWinter Weather AdvisoryLOT39 hr
Dec 23, 2:22 PM CSTWinter Storm WarningLOT31 hr
Dec 26, 12:54 PM CSTWind Chill AdvisoryLOT22 hr
Dec 28, 8:33 PM CSTWinter Weather AdvisoryLOT24 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 archive20162018

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.