Alert archive / Indiana / Benton County

Weather alerts in Benton County, Indiana, 2009

99 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Benton County and its neighbors

Each county as a circle sized by its count in 2009. Tap one for its archive.

Alerts
99
Warnings
22
Watches
20
Advisories
33
Busiest month
June19 alerts
Busiest day
June 19, 20098 alerts

Over time

By month

Warning verification

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

Benton County, 2009

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings13746%475%21 min
Flash flood warnings4250%367%38 min

Each office's whole area, 2009

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Chicago, IL: tornado warnings12375%1173%11 min
NWS Chicago, IL: severe thunderstorm warnings974752%18368%26 min
NWS Chicago, IL: flash flood warnings251060%3187%80 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 6, 4:43 AM ESTFreezing Rain AdvisoryLOT14 hr
Jan 8, 3:53 PM ESTWinter Weather AdvisoryLOT51 hr
Jan 9, 11:05 AM ESTAreal Flood AdvisoryLOT294 days
Jan 10, 12:53 AM ESTMesoscale DiscussionSPC6 hr
Jan 11, 11:49 AM ESTAreal Flood AdvisoryLOT292 days
Jan 11, 12:07 PM ESTAreal Flood AdvisoryLOT292 days
Jan 12, 5:21 AM ESTWinter Weather AdvisoryLOT28 hr
Jan 12, 4:40 PM ESTBlizzard WatchLOT19 hr
Jan 13, 3:07 PM ESTWind Chill WatchLOT13 hr
Jan 13, 4:02 PM ESTWinter Weather AdvisoryLOT33 hr
Jan 14, 12:38 AM ESTMesoscale DiscussionSPC4 hr
Jan 14, 4:23 AM ESTWind Chill WarningLOT57 hr
Jan 16, 9:56 AM ESTAreal Flood AdvisoryLOT137 days
Jan 16, 4:08 PM ESTWind Chill AdvisoryLOT9 hr
Jan 27, 3:29 PM ESTWinter Weather AdvisoryLOT14 hr
Jan 28, 5:52 AM ESTWinter Weather AdvisoryLOT4 hr
Feb 10, 5:00 AM ESTFlood WatchLOT41 hr
Feb 11, 4:40 AM ESTWind AdvisoryLOT18 hr
Feb 11, 3:16 PM ESTMesoscale DiscussionSPC89 min
Feb 20, 4:41 AM ESTWinter Weather AdvisoryLOT41 hr
Feb 26, 4:50 AM ESTDense Fog AdvisoryLOT11 hr
Mar 6, 4:28 PM ESTFlash Flood WatchLOT48 hr
Mar 8, 10:13 AM EDTWind AdvisoryLOT12 hr
Mar 8, 11:39 AM EDTTornado WatchSPC7 hr
Mar 8, 2:54 PM EDTSevere Thunderstorm WarningLOT51 min
Mar 8, 5:36 PM EDTHigh Wind WarningLOT2 hr
Mar 9, 4:39 AM EDTFlash Flood WatchLOT24 hr
Mar 10, 3:03 AM EDTAreal Flood WarningLOT36 hr
Mar 10, 4:37 AM EDTWind AdvisoryLOT27 hr
Mar 10, 10:43 PM EDTFlash Flood WarningLOT8 hr
Mar 24, 5:08 AM EDTWind AdvisoryLOT16 hr
Apr 5, 11:50 AM EDTMesoscale DiscussionSPC115 min
Apr 26, 1:13 PM EDTAreal Flood AdvisoryLOT54 days
Apr 26, 3:17 PM EDTWind AdvisoryLOT5 hr
Apr 27, 4:55 AM EDTWind AdvisoryLOT10 hr
Apr 28, 1:44 AM EDTAreal Flood AdvisoryLOT55 days
May 13, 11:17 PM EDTMesoscale DiscussionSPC58 min
May 13, 11:51 PM EDTSevere Thunderstorm WatchSPC4 hr
May 14, 12:13 AM EDTSevere Thunderstorm WarningLOT62 min
May 14, 1:15 AM EDTSevere Thunderstorm WarningLOT43 min
May 14, 4:34 PM EDTFlash Flood WatchLOT30 hr
May 15, 6:31 PM EDTMesoscale DiscussionSPC119 min
May 15, 7:09 PM EDTSevere Thunderstorm WarningLOT66 min
May 15, 7:39 PM EDTTornado WatchSPC6 hr
May 15, 7:47 PM EDTSevere Thunderstorm WarningLOT58 min
May 15, 8:42 PM EDTSevere Thunderstorm WarningLOT51 min
May 15, 9:07 PM EDTFlash Flood WarningLOT6 hr
May 15, 9:14 PM EDTMesoscale DiscussionSPC2 hr
May 16, 12:16 AM EDTAreal Flood WarningLOT12 hr
May 29, 4:17 PM EDTMesoscale DiscussionSPC88 min
May 30, 7:01 PM EDTMesoscale DiscussionSPC59 min
Jun 1, 2:31 PM EDTMesoscale DiscussionSPC59 min
Jun 1, 3:37 PM EDTSevere Thunderstorm WatchSPC7 hr
Jun 1, 5:27 PM EDTSevere Thunderstorm WarningLOT63 min
Jun 1, 7:34 PM EDTMesoscale DiscussionSPC86 min
Jun 1, 7:45 PM EDTFlash Flood WarningLOT6 hr
Jun 1, 9:57 PM EDTMesoscale DiscussionSPC63 min
Jun 8, 12:54 PM EDTMesoscale DiscussionSPC96 min
Jun 19, 11:27 AM EDTMesoscale DiscussionSPC63 min
Jun 19, 11:50 AM EDTTornado WatchSPC7 hr
Jun 19, 2:08 PM EDTFlash Flood WatchLOT8 hr
Jun 19, 3:24 PM EDTSevere Thunderstorm WatchSPC8 hr
Jun 19, 4:08 PM EDTSevere Thunderstorm WarningLOT12 min
Jun 19, 6:37 PM EDTMesoscale DiscussionSPC53 min
Jun 19, 7:23 PM EDTSevere Thunderstorm WarningLOT52 min
Jun 19, 7:56 PM EDTSevere Thunderstorm WarningLOT94 min
Jun 19, 8:59 PM EDTMesoscale DiscussionSPC91 min
Jun 22, 4:15 PM EDTHeat AdvisoryLOT52 hr
Jun 25, 11:18 AM EDTHeat AdvisoryLOT9 hr
Jun 25, 4:57 PM EDTSevere Thunderstorm WatchSPC5 hr
Jul 25, 12:00 AM EDTSevere Thunderstorm WatchSPC3 hr
Jul 25, 12:46 AM EDTMesoscale DiscussionSPC89 min
Jul 25, 1:02 AM EDTSevere Thunderstorm WarningLOT58 min
Jul 28, 5:07 PM EDTFlash Flood WarningLOT8 hr
Jul 28, 5:48 PM EDTSpecial Weather StatementLOT57 min
Jul 28, 6:17 PM EDTSpecial Weather StatementLOT43 min
Jul 28, 7:15 PM EDTSpecial Weather StatementLOT30 min
Aug 4, 1:26 AM EDTSpecial Weather StatementLOT79 min
Aug 4, 5:29 AM EDTDense Fog AdvisoryLOT4 hr
Aug 4, 8:39 AM EDTSevere Thunderstorm WatchSPC4 hr
Aug 4, 11:11 AM EDTSevere Thunderstorm WarningLOT64 min
Aug 8, 5:07 AM EDTHeat AdvisoryLOT38 hr
Aug 17, 7:48 PM EDTAreal Flood AdvisoryLOT4 hr
Aug 19, 1:49 PM EDTTornado WatchSPC6 hr
Aug 19, 4:19 PM EDTMesoscale DiscussionSPC86 min
Aug 19, 5:36 PM EDTMesoscale DiscussionSPC84 min
Sep 9, 10:19 PM EDTDense Fog AdvisoryLOT12 hr
Sep 12, 10:43 PM EDTDense Fog AdvisoryLOT11 hr
Sep 27, 6:55 AM EDTDense Fog AdvisoryLOT4 hr
Sep 27, 9:22 PM EDTTornado WatchSPC3 hr
Sep 27, 11:26 PM EDTSevere Thunderstorm WarningLOT49 min
Sep 28, 12:04 AM EDTMesoscale DiscussionSPC86 min
Oct 9, 5:00 PM EDTFreeze WarningLOT41 hr
Oct 29, 4:13 PM EDTFlood WatchLOT24 hr
Nov 23, 10:40 PM ESTDense Fog AdvisoryLOT11 hr
Dec 9, 5:47 AM ESTWind AdvisoryLOT13 hr
Dec 22, 4:35 PM ESTWinter Weather AdvisoryLOT29 hr
Dec 23, 4:45 AM ESTFlood WatchLOT55 hr
Dec 27, 5:29 AM ESTWinter Weather AdvisoryLOT10 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 archive20082010

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.