Alert archive / Indiana / Marion County

Weather alerts in Marion County, Indiana, 2016

142 weather alerts in 2016, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Marion County and its neighbors

Each county as a circle sized by its count in 2016. Tap one for its archive.

Alerts
142
Warnings
52
Watches
19
Advisories
33
Busiest month
August31 alerts
Busiest day
August 24, 201612 alerts

Over time

By month

Warning verification

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

1 of 8 tornado warnings covering Marion County in 2016 had a tornado report inside them.

Marion County, 2016

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings8188%0
Severe thunderstorm warnings221627%4163%25 min
Flash flood warnings3233%13100%77 min

Each office's whole area, 2016

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Indianapolis, IN: tornado warnings531081%1974%18 min
NWS Indianapolis, IN: severe thunderstorm warnings1437349%22564%19 min
NWS Indianapolis, IN: flash flood warnings221245%26100%73 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, Eastern Time. Each opens its own page with the text, the map, the radar and the sounding.

IssuedProductOfficeLasted
Jan 9, 4:00 PM ESTWinter Weather AdvisoryIND18 hr
Jan 11, 3:51 PM ESTWinter Weather AdvisoryIND23 hr
Jan 17, 3:55 AM ESTWind Chill AdvisoryIND32 hr
Jan 19, 4:11 AM ESTWinter Weather AdvisoryIND29 hr
Feb 13, 3:58 PM ESTWinter Weather AdvisoryIND35 hr
Feb 18, 2:44 PM ESTWind AdvisoryIND28 hr
Feb 23, 4:05 PM ESTWinter Weather AdvisoryIND49 hr
Feb 24, 10:23 PM ESTRiver Flood WarningIND25 hr
Feb 28, 5:03 AM ESTWind AdvisoryIND14 hr
Mar 9, 11:23 AM ESTRiver Flood WarningIND3 days
Mar 10, 12:19 AM ESTDense Fog AdvisoryIND5 hr
Mar 15, 2:57 PM EDTWind AdvisoryIND29 hr
Mar 24, 1:54 PM EDTMesoscale DiscussionSPC3 hr
Mar 27, 3:23 PM EDTMesoscale DiscussionSPC2 hr
Mar 27, 4:50 PM EDTSevere Thunderstorm WatchSPC6 hr
Mar 27, 5:42 PM EDTSevere Thunderstorm WarningIND48 min
Mar 27, 6:15 PM EDTMesoscale DiscussionSPC2 hr
Mar 27, 8:08 PM EDTSevere Thunderstorm WarningIND37 min
Mar 27, 8:17 PM EDTSevere Thunderstorm WarningIND28 min
Mar 27, 8:39 PM EDTSevere Thunderstorm WarningIND51 min
Mar 31, 1:36 PM EDTMesoscale DiscussionSPC84 min
Mar 31, 6:09 PM EDTMesoscale DiscussionSPC96 min
Apr 1, 2:29 PM EDTFreeze WatchIND13 hr
Apr 1, 2:29 PM EDTWind AdvisoryIND26 hr
Apr 2, 3:45 AM EDTFreeze WarningIND29 hr
Apr 2, 4:33 PM EDTHigh Wind WarningIND3 hr
Apr 3, 3:20 PM EDTFreeze WatchIND13 hr
Apr 4, 3:50 AM EDTFreeze WarningIND29 hr
Apr 6, 8:59 AM EDTWind AdvisoryIND11 hr
Apr 7, 3:44 AM EDTFreeze WatchIND12 hr
Apr 7, 3:26 PM EDTFreeze WatchIND12 hr
Apr 7, 3:26 PM EDTFreeze WarningIND18 hr
Apr 8, 3:34 AM EDTFreeze WarningIND31 hr
Apr 8, 4:12 PM EDTFreeze WatchIND11 hr
Apr 9, 3:40 AM EDTFreeze WarningIND28 hr
Apr 10, 10:30 AM EDTRiver Flood WarningIND4 days
Apr 11, 3:05 PM EDTFreeze WarningIND18 hr
Apr 12, 3:28 AM EDTFreeze WatchIND12 hr
Apr 12, 3:36 PM EDTFreeze WarningIND17 hr
Apr 26, 1:58 PM EDTMesoscale DiscussionSPC3 hr
Apr 26, 4:27 PM EDTSevere Thunderstorm WarningIND33 min
Apr 26, 4:51 PM EDTSevere Thunderstorm WarningIND24 min
Apr 28, 3:53 PM EDTMesoscale DiscussionSPC97 min
May 1, 6:06 PM EDTMesoscale DiscussionSPC114 min
May 1, 7:58 PM EDTSevere Thunderstorm WatchSPC4 hr
May 1, 8:56 PM EDTSevere Thunderstorm WarningIND64 min
May 1, 9:14 PM EDTTornado WarningIND46 min
May 1, 9:21 PM EDTMesoscale DiscussionSPC114 min
May 1, 9:48 PM EDTSevere Thunderstorm WarningIND42 min
May 11, 4:39 PM EDTMesoscale DiscussionSPC66 min
May 11, 4:55 PM EDTSevere Thunderstorm WatchSPC5 hr
May 11, 8:30 PM EDTSevere Thunderstorm WarningIND30 min
May 15, 12:41 PM EDTFrost AdvisoryIND19 hr
May 26, 10:05 AM EDTMesoscale DiscussionSPC85 min
Jun 1, 2:32 PM EDTSpecial Weather StatementIND28 min
Jun 1, 3:38 PM EDTSpecial Weather StatementIND52 min
Jun 6, 3:11 PM EDTMesoscale DiscussionSPC3 hr
Jun 15, 3:23 PM EDTMesoscale DiscussionSPC97 min
Jun 15, 3:38 PM EDTSevere Thunderstorm WarningIND37 min
Jun 15, 4:00 PM EDTSevere Thunderstorm WatchSPC5 hr
Jun 15, 4:23 PM EDTSevere Thunderstorm WarningIND37 min
Jun 15, 4:30 PM EDTAreal Flood AdvisoryIND2 hr
Jun 15, 4:45 PM EDTSevere Thunderstorm WarningIND30 min
Jun 15, 6:16 PM EDTFlash Flood WarningIND3 hr
Jun 15, 9:40 PM EDTAreal Flood WarningIND3 hr
Jun 16, 12:28 AM EDTAreal Flood WarningIND6 hr
Jun 20, 4:03 PM EDTSevere Thunderstorm WatchSPC7 hr
Jun 20, 7:05 PM EDTMesoscale DiscussionSPC85 min
Jun 22, 10:33 PM EDTTornado WatchSPC8 hr
Jun 23, 12:51 AM EDTMesoscale DiscussionSPC84 min
Jun 23, 2:42 AM EDTSevere Thunderstorm WarningIND33 min
Jun 23, 3:44 AM EDTAreal Flood AdvisoryIND5 hr
Jun 26, 3:39 PM EDTMesoscale DiscussionSPC96 min
Jul 3, 3:44 AM EDTFlash Flood WatchIND19 hr
Jul 3, 10:59 PM EDTFlash Flood WatchIND16 hr
Jul 6, 8:53 AM EDTAreal Flood AdvisoryIND3 hr
Jul 13, 3:03 PM EDTMesoscale DiscussionSPC87 min
Jul 13, 4:16 PM EDTSevere Thunderstorm WatchSPC3 hr
Jul 13, 4:42 PM EDTSevere Thunderstorm WarningIND33 min
Jul 13, 5:13 PM EDTSpecial Weather StatementIND32 min
Jul 13, 6:01 PM EDTSevere Thunderstorm WarningIND29 min
Jul 13, 6:26 PM EDTSevere Thunderstorm WarningIND34 min
Jul 13, 6:47 PM EDTAreal Flood AdvisoryIND3 hr
Jul 13, 6:56 PM EDTSevere Thunderstorm WarningIND34 min
Jul 13, 7:15 PM EDTSevere Thunderstorm WatchSPC6 hr
Jul 13, 8:01 PM EDTSevere Thunderstorm WarningIND44 min
Jul 13, 9:26 PM EDTMesoscale DiscussionSPC2 hr
Jul 17, 1:20 PM EDTMesoscale DiscussionSPC115 min
Jul 18, 4:36 AM EDTSpecial Weather StatementIND54 min
Jul 18, 6:25 AM EDTAreal Flood WarningIND6 hr
Jul 18, 12:27 PM EDTAreal Flood WarningIND3 hr
Jul 20, 2:53 PM EDTHeat AdvisoryIND4 days
Jul 28, 7:45 PM EDTAreal Flood AdvisoryIND2 hr
Jul 29, 12:03 PM EDTMesoscale DiscussionSPC117 min
Jul 29, 5:20 PM EDTAreal Flood AdvisoryIND115 min
Jul 29, 7:13 PM EDTAreal Flood WarningIND2 hr
Aug 4, 2:51 PM EDTSpecial Weather StatementIND24 min
Aug 4, 3:44 PM EDTAreal Flood AdvisoryIND3 hr
Aug 13, 3:59 AM EDTFlash Flood WatchIND3 days
Aug 15, 5:44 PM EDTTornado Warning Tornado observedIND31 min
Aug 18, 6:36 AM EDTDense Fog AdvisoryIND3 hr
Aug 24, 2:20 PM EDTMesoscale DiscussionSPC85 min
Aug 24, 3:10 PM EDTTornado WatchSPC8 hr
Aug 24, 3:13 PM EDTSevere Thunderstorm WarningIND32 min
Aug 24, 3:25 PM EDTTornado WarningIND35 min
Aug 24, 3:54 PM EDTTornado WarningIND51 min
Aug 24, 4:40 PM EDTSevere Thunderstorm WarningIND35 min
Aug 24, 4:43 PM EDTMesoscale DiscussionSPC92 min
Aug 24, 4:45 PM EDTAreal Flood AdvisoryIND2 hr
Aug 24, 4:49 PM EDTTornado WarningIND26 min
Aug 24, 5:09 PM EDTTornado WarningIND21 min
Aug 24, 5:13 PM EDTAreal Flood WarningIND3 hr
Aug 24, 5:15 PM EDTTornado WarningIND30 min
Aug 24, 8:18 PM EDTMesoscale DiscussionSPC57 min
Aug 26, 8:28 AM EDTSpecial Weather StatementIND47 min
Aug 26, 8:40 AM EDTSevere Thunderstorm WarningIND35 min
Aug 26, 8:53 AM EDTTornado WarningIND22 min
Aug 26, 9:19 AM EDTAreal Flood AdvisoryIND3 hr
Aug 26, 5:24 PM EDTAreal Flood AdvisoryIND3 hr
Aug 26, 6:12 PM EDTFlash Flood WarningIND3 hr
Aug 26, 9:03 PM EDTAreal Flood WarningIND9 hr
Aug 27, 8:38 AM EDTRiver Flood WarningIND24 hr
Aug 27, 10:19 AM EDTFlash Flood WarningIND4 hr
Aug 28, 5:16 PM EDTSpecial Weather StatementIND59 min
Aug 28, 5:32 PM EDTAreal Flood AdvisoryIND3 hr
Aug 30, 7:54 PM EDTSpecial Weather StatementIND36 min
Aug 30, 8:11 PM EDTAreal Flood AdvisoryIND2 hr
Sep 8, 2:42 PM EDTMesoscale DiscussionSPC3 hr
Sep 9, 3:37 PM EDTMesoscale DiscussionSPC2 hr
Sep 9, 6:08 PM EDTMesoscale DiscussionSPC2 hr
Sep 9, 7:30 PM EDTTornado WatchSPC5 hr
Sep 9, 9:30 PM EDTMesoscale DiscussionSPC60 min
Sep 9, 11:54 PM EDTAreal Flood AdvisoryIND3 hr
Sep 10, 8:28 AM EDTAreal Flood AdvisoryIND3 hr
Sep 16, 3:18 PM EDTSpecial Weather StatementIND42 min
Oct 19, 2:26 PM EDTMesoscale DiscussionSPC2 hr
Nov 18, 5:41 PM ESTSevere Thunderstorm WarningIND49 min
Nov 18, 6:31 PM ESTMesoscale DiscussionSPC59 min
Dec 14, 4:59 AM ESTWind Chill AdvisoryIND30 hr
Dec 16, 3:20 PM ESTWinter Weather AdvisoryIND18 hr
Dec 17, 3:57 AM ESTWinter Weather AdvisoryIND32 hr
Dec 25, 7:02 PM ESTDense Fog AdvisoryIND8 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 archive20152017

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.