Alert archive / Indiana / DeKalb County

Weather alerts in DeKalb County, Indiana, 2017

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

DeKalb County and its neighbors

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

Alerts
120
Warnings
28
Watches
14
Advisories
26
Busiest month
March18 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.

DeKalb County, 2017

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings151127%771%10 min
Flash flood warnings00

Each office's whole area, 2017

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Northern Indiana: tornado warnings26677%1771%10 min
NWS Northern Indiana: severe thunderstorm warnings1266152%26356%17 min
NWS Northern Indiana: flash flood warnings9367%1275%103 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 3, 4:01 AM ESTDense Fog AdvisoryIWX8 hr
Jan 8, 12:06 AM ESTSpecial Weather StatementIWX39 min
Jan 8, 12:55 AM ESTSpecial Weather StatementIWX35 min
Jan 9, 2:25 PM ESTWinter Weather AdvisoryIWX21 hr
Jan 10, 4:05 AM ESTWind AdvisoryIWX19 hr
Jan 10, 6:49 PM ESTSpecial Weather StatementIWX41 min
Jan 12, 7:53 AM ESTSpecial Weather StatementIWX37 min
Jan 12, 4:26 PM ESTRiver Flood WarningIWX5 days
Jan 16, 1:21 PM ESTDense Fog AdvisoryIWX11 hr
Jan 21, 2:28 PM ESTDense Fog AdvisoryIWX38 hr
Jan 22, 3:37 PM ESTDense Fog AdvisoryIWX12 hr
Jan 28, 5:02 PM ESTSpecial Weather StatementIWX58 min
Jan 30, 3:10 PM ESTWinter Weather AdvisoryIWX18 hr
Feb 7, 12:40 AM ESTDense Fog AdvisoryIWX6 hr
Feb 11, 8:47 PM ESTRiver Flood WarningIWX44 hr
Feb 12, 10:45 AM ESTWind AdvisoryIWX9 hr
Feb 19, 7:43 AM ESTDense Fog AdvisoryIWX3 hr
Feb 24, 3:07 PM ESTMesoscale DiscussionSPC2 hr
Feb 24, 3:44 PM ESTSevere Thunderstorm WatchSPC6 hr
Feb 24, 5:56 PM ESTMesoscale DiscussionSPC94 min
Feb 27, 10:06 AM ESTRiver Flood WarningIWX3 days
Feb 28, 6:13 PM ESTSpecial Weather StatementIWX47 min
Feb 28, 6:26 PM ESTSevere Thunderstorm WarningIWX34 min
Feb 28, 6:45 PM ESTSevere Thunderstorm WarningIWX30 min
Feb 28, 7:00 PM ESTMesoscale DiscussionSPC90 min
Feb 28, 7:37 PM ESTSevere Thunderstorm WatchSPC8 hr
Feb 28, 9:41 PM ESTMesoscale DiscussionSPC94 min
Feb 28, 11:03 PM ESTMesoscale DiscussionSPC117 min
Feb 28, 11:29 PM ESTTornado WatchSPC8 hr
Mar 1, 1:44 AM ESTMesoscale DiscussionSPC61 min
Mar 1, 2:06 AM ESTSevere Thunderstorm WarningIWX39 min
Mar 1, 2:29 AM ESTSevere Thunderstorm WarningIWX61 min
Mar 1, 10:54 AM ESTWind AdvisoryIWX11 hr
Mar 7, 4:15 AM ESTSpecial Weather StatementIWX60 min
Mar 7, 12:36 PM ESTHigh Wind WatchIWX9 hr
Mar 7, 9:46 PM ESTHigh Wind WarningIWX20 hr
Mar 12, 4:01 AM EDTWinter Weather AdvisoryIWX35 hr
Mar 16, 3:34 PM EDTWinter Weather AdvisoryIWX24 hr
Mar 17, 11:45 PM EDTDense Fog AdvisoryIWX6 hr
Mar 21, 1:13 AM EDTDense Fog AdvisoryIWX9 hr
Mar 30, 6:02 PM EDTSpecial Weather StatementIWX58 min
Mar 31, 6:38 AM EDTRiver Flood WarningIWX13 days
Apr 5, 3:25 PM EDTWind AdvisoryIWX30 hr
Apr 10, 4:25 PM EDTMesoscale DiscussionSPC2 hr
Apr 10, 9:30 PM EDTSpecial Weather StatementIWX30 min
Apr 19, 2:50 PM EDTMesoscale DiscussionSPC115 min
Apr 19, 8:13 PM EDTSevere Thunderstorm WarningIWX47 min
Apr 20, 1:36 PM EDTMesoscale DiscussionSPC84 min
Apr 20, 2:08 PM EDTSevere Thunderstorm WatchSPC6 hr
Apr 20, 4:31 PM EDTMesoscale DiscussionSPC119 min
Apr 20, 5:59 PM EDTSpecial Weather StatementIWX31 min
Apr 20, 7:01 PM EDTMesoscale DiscussionSPC59 min
Apr 26, 5:58 PM EDTSevere Thunderstorm WatchSPC4 hr
Apr 26, 8:13 PM EDTMesoscale DiscussionSPC62 min
Apr 26, 8:36 PM EDTSpecial Weather StatementIWX24 min
Apr 26, 9:26 PM EDTSevere Thunderstorm WarningIWX34 min
Apr 30, 12:03 AM EDTSpecial Weather StatementIWX27 min
May 3, 3:53 AM EDTFlood WatchIWX47 hr
May 3, 12:22 PM EDTRiver Flood WarningIWX6 days
May 6, 2:58 PM EDTFreeze WatchIWX13 hr
May 7, 3:40 AM EDTFreeze WarningIWX28 hr
May 27, 12:25 PM EDTRiver Flood WarningIWX4 days
May 28, 1:16 PM EDTMesoscale DiscussionSPC119 min
May 28, 1:56 PM EDTSevere Thunderstorm WatchSPC6 hr
May 28, 2:19 PM EDTSpecial Weather StatementIWX26 min
May 28, 2:29 PM EDTSevere Thunderstorm WarningIWX46 min
May 28, 3:17 PM EDTSpecial Weather StatementIWX28 min
May 28, 3:33 PM EDTSevere Thunderstorm WarningIWX42 min
May 28, 4:09 PM EDTMesoscale DiscussionSPC66 min
May 28, 5:46 PM EDTMesoscale DiscussionSPC59 min
Jun 4, 4:06 PM EDTMesoscale DiscussionSPC54 min
Jun 4, 4:08 PM EDTSevere Thunderstorm WarningIWX30 min
Jun 4, 4:52 PM EDTSpecial Weather StatementIWX23 min
Jun 13, 4:05 PM EDTSevere Thunderstorm WarningIWX40 min
Jun 14, 4:02 PM EDTMesoscale DiscussionSPC118 min
Jun 19, 2:09 PM EDTSpecial Weather StatementIWX51 min
Jun 19, 2:19 PM EDTSevere Thunderstorm WarningIWX41 min
Jun 19, 6:50 PM EDTSpecial Weather StatementIWX25 min
Jun 19, 7:15 PM EDTSpecial Weather StatementIWX30 min
Jun 30, 1:56 PM EDTMesoscale DiscussionSPC2 hr
Jul 7, 8:51 AM EDTMesoscale DiscussionSPC114 min
Jul 7, 9:46 AM EDTSevere Thunderstorm WatchSPC7 hr
Jul 7, 9:57 AM EDTSpecial Weather StatementIWX33 min
Jul 7, 10:53 AM EDTFlash Flood WatchIWX6 hr
Jul 7, 11:22 AM EDTMesoscale DiscussionSPC53 min
Jul 10, 9:54 AM EDTAreal Flood AdvisoryIWX111 min
Jul 12, 9:33 AM EDTMesoscale DiscussionSPC117 min
Jul 12, 11:25 AM EDTFlood WatchIWX17 hr
Jul 13, 3:19 AM EDTMesoscale DiscussionSPC3 hr
Jul 20, 1:46 AM EDTSpecial Weather StatementIWX44 min
Jul 23, 2:03 PM EDTMesoscale DiscussionSPC2 hr
Jul 23, 4:18 PM EDTSpecial Weather StatementIWX42 min
Aug 17, 12:04 PM EDTMesoscale DiscussionSPC116 min
Aug 30, 12:02 AM EDTDense Fog AdvisoryIWX10 hr
Sep 4, 3:17 PM EDTMesoscale DiscussionSPC118 min
Sep 4, 4:32 PM EDTSevere Thunderstorm WatchSPC6 hr
Sep 4, 6:32 PM EDTSpecial Weather StatementIWX43 min
Sep 4, 6:50 PM EDTMesoscale DiscussionSPC115 min
Sep 14, 1:59 AM EDTDense Fog AdvisoryIWX8 hr
Sep 20, 3:33 AM EDTDense Fog AdvisoryIWX6 hr
Oct 7, 5:40 PM EDTMesoscale DiscussionSPC3 hr
Oct 7, 8:18 PM EDTSpecial Weather StatementIWX27 min
Oct 7, 8:47 PM EDTSpecial Weather StatementIWX43 min
Oct 25, 3:43 AM EDTFrost AdvisoryIWX29 hr
Nov 5, 1:09 AM EDTDense Fog AdvisoryIWX11 hr
Nov 5, 3:23 AM ESTFlash Flood WatchIWX13 hr
Nov 5, 10:31 AM ESTSevere Thunderstorm WarningIWX44 min
Nov 5, 11:05 AM ESTSevere Thunderstorm WarningIWX40 min
Nov 5, 11:15 AM ESTSevere Thunderstorm WarningIWX30 min
Nov 5, 11:35 AM ESTSevere Thunderstorm WarningIWX40 min
Nov 5, 11:54 AM ESTAreal Flood WarningIWX3 hr
Nov 5, 1:06 PM ESTAreal Flood WarningIWX6 hr
Nov 6, 9:36 AM ESTRiver Flood WarningIWX4 days
Nov 14, 2:25 AM ESTDense Fog AdvisoryIWX7 hr
Nov 18, 10:01 AM ESTRiver Flood WarningIWX35 hr
Nov 20, 10:55 AM ESTRiver Flood WarningIWX4 days
Dec 4, 9:14 PM ESTWind AdvisoryIWX28 hr
Dec 13, 4:11 PM ESTSpecial Weather StatementIWX79 min
Dec 23, 3:11 PM ESTWinter Weather AdvisoryIWX31 hr
Dec 26, 3:50 AM ESTWind Chill AdvisoryIWX31 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.