Alert archive / Indiana / Randolph County

Weather alerts in Randolph County, Indiana, 2009

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

Randolph County and its neighbors

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

Alerts
93
Warnings
12
Watches
21
Advisories
31
Busiest month
January15 alerts
Busiest day
June 19, 20097 alerts

Over time

By month

Warning verification

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

Randolph County, 2009

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings330%0
Flash flood warnings110%1100%15 min

Each office's whole area, 2009

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Indianapolis, IN: tornado warnings26388%743%11 min
NWS Indianapolis, IN: severe thunderstorm warnings1367049%20169%21 min
NWS Indianapolis, IN: flash flood warnings431663%2882%46 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 4, 8:15 AM ESTDense Fog AdvisoryIND3 hr
Jan 5, 3:20 PM ESTWinter Weather AdvisoryIND33 hr
Jan 6, 5:53 AM ESTMesoscale DiscussionSPC3 hr
Jan 9, 4:02 AM ESTWinter Weather AdvisoryIND39 hr
Jan 10, 12:53 AM ESTMesoscale DiscussionSPC6 hr
Jan 10, 6:33 AM ESTMesoscale DiscussionSPC5 hr
Jan 12, 3:18 PM ESTWinter Weather AdvisoryIND12 hr
Jan 13, 3:11 PM ESTWind Chill WatchIND13 hr
Jan 13, 3:11 PM ESTWinter Weather AdvisoryIND28 hr
Jan 14, 3:50 AM ESTWind Chill WarningIND57 hr
Jan 14, 3:50 AM ESTWind Chill AdvisoryIND3 days
Jan 14, 7:07 PM ESTWinter Weather AdvisoryIND8 hr
Jan 26, 3:25 PM ESTWinter Storm WarningIND45 hr
Jan 26, 3:25 PM ESTWinter Weather AdvisoryIND45 hr
Jan 28, 12:31 AM ESTMesoscale DiscussionSPC5 hr
Feb 3, 8:26 AM ESTWinter Weather AdvisoryIND4 hr
Feb 3, 12:16 PM ESTWinter Weather AdvisoryIND7 hr
Feb 10, 3:42 AM ESTHigh Wind WatchIND11 hr
Feb 10, 2:37 PM ESTHigh Wind WarningIND34 hr
Feb 11, 3:16 PM ESTMesoscale DiscussionSPC89 min
Feb 11, 10:13 PM ESTAreal Flood AdvisoryIND111 days
Feb 12, 12:56 AM ESTWind AdvisoryIND17 hr
Mar 5, 2:10 PM ESTWind AdvisoryIND4 hr
Mar 8, 5:13 AM EDTWind AdvisoryIND23 hr
Mar 8, 2:31 PM EDTMesoscale DiscussionSPC119 min
Mar 8, 2:52 PM EDTTornado WatchSPC5 hr
Mar 8, 4:14 PM EDTMesoscale DiscussionSPC91 min
Mar 10, 10:59 PM EDTWind AdvisoryIND9 hr
Mar 11, 12:19 AM EDTSevere Thunderstorm WarningIND26 min
Apr 2, 9:02 PM EDTMesoscale DiscussionSPC118 min
Apr 3, 9:20 AM EDTWind AdvisoryIND6 hr
Apr 5, 7:45 PM EDTAreal Flood AdvisoryIND67 days
Apr 5, 10:30 PM EDTFreeze WarningIND35 hr
Apr 6, 3:49 AM EDTFreeze WatchIND35 hr
Apr 7, 3:05 PM EDTFreeze WarningIND18 hr
Apr 10, 1:20 PM EDTFreeze WatchIND23 hr
Apr 11, 12:45 PM EDTFreeze WarningIND20 hr
May 7, 3:01 AM EDTDense Fog AdvisoryIND5 hr
May 7, 8:04 AM EDTDense Fog AdvisoryIND116 min
May 13, 3:31 PM EDTFlood WatchIND15 hr
May 14, 1:42 AM EDTSevere Thunderstorm WatchSPC4 hr
May 14, 3:19 AM EDTSevere Thunderstorm WarningIND44 min
May 15, 7:39 PM EDTTornado WatchSPC6 hr
May 15, 9:14 PM EDTMesoscale DiscussionSPC2 hr
May 15, 11:28 PM EDTMesoscale DiscussionSPC2 hr
May 17, 3:49 AM EDTFrost AdvisoryIND28 hr
May 29, 4:17 PM EDTMesoscale DiscussionSPC88 min
May 30, 7:01 PM EDTMesoscale DiscussionSPC59 min
May 30, 7:29 PM EDTSevere Thunderstorm WatchSPC4 hr
May 30, 9:53 PM EDTMesoscale DiscussionSPC67 min
Jun 1, 3:37 PM EDTSevere Thunderstorm WatchSPC7 hr
Jun 1, 7:34 PM EDTMesoscale DiscussionSPC86 min
Jun 1, 9:57 PM EDTMesoscale DiscussionSPC63 min
Jun 2, 3:18 PM EDTSevere Thunderstorm WatchSPC8 hr
Jun 14, 12:33 PM EDTMesoscale DiscussionSPC87 min
Jun 17, 2:27 AM EDTDense Fog AdvisoryIND4 hr
Jun 19, 3:38 AM EDTMesoscale DiscussionSPC97 min
Jun 19, 4:16 AM EDTSevere Thunderstorm WatchSPC6 hr
Jun 19, 11:27 AM EDTMesoscale DiscussionSPC63 min
Jun 19, 11:50 AM EDTTornado WatchSPC7 hr
Jun 19, 2:37 PM EDTMesoscale DiscussionSPC83 min
Jun 19, 6:11 PM EDTMesoscale DiscussionSPC94 min
Jun 19, 6:59 PM EDTTornado WatchSPC8 hr
Jun 19, 9:34 PM EDTMesoscale DiscussionSPC86 min
Jun 26, 12:28 AM EDTFlash Flood WarningIND3 hr
Jul 24, 5:21 AM EDTDense Fog AdvisoryIND4 hr
Jul 25, 4:09 AM EDTMesoscale DiscussionSPC96 min
Aug 4, 5:37 AM EDTMesoscale DiscussionSPC53 min
Aug 4, 9:41 AM EDTSevere Thunderstorm WatchSPC6 hr
Aug 4, 1:15 PM EDTSevere Thunderstorm WarningIND18 min
Aug 8, 3:40 PM EDTHeat AdvisoryIND27 hr
Aug 11, 12:39 PM EDTMesoscale DiscussionSPC2 hr
Aug 19, 5:36 PM EDTMesoscale DiscussionSPC84 min
Aug 19, 6:11 PM EDTTornado WatchSPC5 hr
Aug 20, 11:42 AM EDTMesoscale DiscussionSPC2 hr
Aug 28, 2:57 PM EDTMesoscale DiscussionSPC3 hr
Sep 9, 5:37 AM EDTDense Fog AdvisoryIND5 hr
Sep 27, 3:54 PM EDTWind AdvisoryIND28 hr
Sep 28, 12:04 AM EDTMesoscale DiscussionSPC86 min
Sep 28, 12:21 AM EDTSevere Thunderstorm WatchSPC3 hr
Sep 30, 2:12 PM EDTFrost AdvisoryIND18 hr
Oct 7, 2:52 PM EDTFlood WatchIND47 hr
Oct 10, 3:17 AM EDTFreeze WatchIND12 hr
Oct 10, 3:00 PM EDTFreeze WarningIND18 hr
Oct 16, 3:44 PM EDTFreeze WatchIND23 hr
Oct 17, 3:05 PM EDTFreeze WarningIND17 hr
Oct 23, 2:44 PM EDTMesoscale DiscussionSPC91 min
Dec 7, 3:15 PM ESTHigh Wind WatchIND24 hr
Dec 8, 3:04 PM ESTWind AdvisoryIND30 hr
Dec 13, 4:07 AM ESTWinter Weather AdvisoryIND3 hr
Dec 23, 9:34 AM ESTFreezing Rain AdvisoryIND4 hr
Dec 24, 5:48 AM ESTFreezing Rain AdvisoryIND10 hr
Dec 27, 4:12 AM ESTWinter Weather AdvisoryIND17 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.