Alert archive / Pennsylvania / Indiana County

Weather alerts in Indiana County, Pennsylvania, 2011

129 weather alerts in 2011, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Indiana County and its neighbors

Each county as a circle sized by its count in 2011. Tap one for its archive.

Alerts
129
Warnings
31
Watches
14
Advisories
4
Busiest month
July26 alerts
Busiest day
April 26, 20118 alerts

Over time

By month

Warning verification

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

0 of 1 tornado warnings covering Indiana County in 2011 had a tornado report inside them.

Indiana County, 2011

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings10100%0
Severe thunderstorm warnings241825%1275%28 min
Flash flood warnings110%1100%112 min

Each office's whole area, 2011

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Pittsburgh, PA: tornado warnings9189%1100%8 min
NWS Pittsburgh, PA: severe thunderstorm warnings23116130%42883%22 min
NWS Pittsburgh, PA: flash flood warnings211148%2391%81 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, 10:40 PM ESTSpecial Weather StatementPBZ110 min
Jan 7, 7:09 AM ESTSpecial Weather StatementPBZ51 min
Jan 7, 7:59 AM ESTSpecial Weather StatementPBZ61 min
Jan 26, 7:30 AM ESTMesoscale DiscussionSPC5 hr
Feb 1, 12:12 AM ESTMesoscale DiscussionSPC5 hr
Feb 1, 8:39 PM ESTMesoscale DiscussionSPC6 hr
Feb 20, 7:46 PM ESTMesoscale DiscussionSPC4 hr
Feb 20, 11:50 PM ESTMesoscale DiscussionSPC5 hr
Feb 21, 5:58 PM ESTMesoscale DiscussionSPC4 hr
Feb 28, 5:47 AM ESTTornado WatchSPC5 hr
Feb 28, 6:32 AM ESTSpecial Weather StatementPBZ28 min
Feb 28, 8:14 AM ESTAreal Flood WarningPBZ10 hr
Mar 8, 9:53 PM ESTRiver Flood WatchPBZ30 hr
Mar 10, 3:54 PM ESTAreal Flood AdvisoryPBZ7 hr
Mar 10, 9:54 PM ESTAreal Flood WarningPBZ12 hr
Mar 21, 4:03 AM EDTSpecial Weather StatementPBZ57 min
Mar 23, 3:45 PM EDTSevere Thunderstorm WarningPBZ60 min
Mar 23, 3:54 PM EDTMesoscale DiscussionSPC96 min
Mar 23, 4:25 PM EDTSevere Thunderstorm WarningPBZ65 min
Mar 23, 4:34 PM EDTSevere Thunderstorm WarningPBZ56 min
Mar 23, 4:54 PM EDTTornado WarningPBZ36 min
Mar 23, 5:22 PM EDTSevere Thunderstorm WarningPBZ42 min
Apr 4, 10:59 AM EDTSpecial Weather StatementPBZ2 hr
Apr 4, 2:55 PM EDTSpecial Weather StatementPBZ65 min
Apr 4, 6:00 PM EDTMesoscale DiscussionSPC90 min
Apr 19, 8:43 PM EDTSpecial Weather StatementPBZ47 min
Apr 20, 2:22 AM EDTSevere Thunderstorm WatchSPC3 hr
Apr 20, 3:20 AM EDTMesoscale DiscussionSPC85 min
Apr 25, 1:52 PM EDTMesoscale DiscussionSPC83 min
Apr 25, 2:47 PM EDTSevere Thunderstorm WatchSPC7 hr
Apr 25, 6:00 PM EDTMesoscale DiscussionSPC60 min
Apr 26, 1:18 PM EDTMesoscale DiscussionSPC57 min
Apr 26, 1:49 PM EDTSevere Thunderstorm WatchSPC7 hr
Apr 26, 3:01 PM EDTSpecial Weather StatementPBZ14 min
Apr 26, 4:12 PM EDTMesoscale DiscussionSPC63 min
Apr 26, 4:28 PM EDTSevere Thunderstorm WarningPBZ47 min
Apr 26, 4:44 PM EDTSevere Thunderstorm WarningPBZ46 min
Apr 26, 5:16 PM EDTSevere Thunderstorm WarningPBZ14 min
Apr 26, 6:51 PM EDTMesoscale DiscussionSPC54 min
Apr 27, 1:24 PM EDTMesoscale DiscussionSPC96 min
Apr 27, 3:10 PM EDTTornado WatchSPC7 hr
Apr 27, 4:06 PM EDTSpecial Weather StatementPBZ54 min
Apr 27, 4:30 PM EDTSevere Thunderstorm WarningPBZ30 min
Apr 27, 4:32 PM EDTSevere Thunderstorm WarningPBZ58 min
Apr 27, 5:01 PM EDTSevere Thunderstorm WarningPBZ44 min
May 15, 8:42 AM EDTSpecial Weather StatementPBZ3 hr
May 15, 10:28 AM EDTAreal Flood WarningPBZ6 hr
May 15, 6:28 PM EDTSpecial Weather StatementPBZ47 min
May 18, 11:55 AM EDTMesoscale DiscussionSPC65 min
May 18, 12:55 PM EDTSevere Thunderstorm WatchSPC8 hr
May 18, 3:08 PM EDTMesoscale DiscussionSPC67 min
May 23, 10:33 AM EDTMesoscale DiscussionSPC87 min
May 24, 12:10 AM EDTSpecial Weather StatementPBZ35 min
May 26, 4:53 PM EDTSevere Thunderstorm WarningPBZ52 min
May 26, 4:56 PM EDTSevere Thunderstorm WarningPBZ50 min
May 26, 5:25 PM EDTSevere Thunderstorm WarningPBZ50 min
May 26, 5:40 PM EDTSevere Thunderstorm WarningPBZ33 min
May 26, 5:49 PM EDTMesoscale DiscussionSPC56 min
May 26, 6:06 PM EDTSevere Thunderstorm WatchSPC6 hr
May 27, 5:51 PM EDTSpecial Weather StatementPBZ39 min
May 27, 6:28 PM EDTSpecial Weather StatementPBZ62 min
Jun 4, 2:22 PM EDTSpecial Weather StatementPBZ53 min
Jun 9, 10:36 AM EDTMesoscale DiscussionSPC84 min
Jun 9, 11:33 AM EDTMesoscale DiscussionSPC57 min
Jun 9, 12:53 PM EDTSevere Thunderstorm WatchSPC7 hr
Jun 9, 2:51 PM EDTSevere Thunderstorm WarningPBZ54 min
Jun 10, 2:52 PM EDTSpecial Weather StatementPBZ53 min
Jun 16, 5:53 PM EDTSpecial Weather StatementPBZ52 min
Jun 16, 6:01 PM EDTMesoscale DiscussionSPC89 min
Jun 16, 6:58 PM EDTAreal Flood AdvisoryPBZ3 hr
Jun 16, 7:04 PM EDTSpecial Weather StatementPBZ26 min
Jun 23, 12:33 PM EDTMesoscale DiscussionSPC117 min
Jun 23, 3:21 PM EDTSpecial Weather StatementPBZ54 min
Jun 23, 3:27 PM EDTMesoscale DiscussionSPC2 hr
Jun 23, 4:54 PM EDTSpecial Weather StatementPBZ66 min
Jun 28, 1:19 PM EDTMesoscale DiscussionSPC86 min
Jul 11, 5:14 PM EDTSevere Thunderstorm WarningPBZ61 min
Jul 11, 5:54 PM EDTMesoscale DiscussionSPC96 min
Jul 18, 1:18 PM EDTMesoscale DiscussionSPC117 min
Jul 18, 2:53 PM EDTSpecial Weather StatementPBZ22 min
Jul 22, 5:19 PM EDTMesoscale DiscussionSPC56 min
Jul 22, 5:37 PM EDTSevere Thunderstorm WatchSPC4 hr
Jul 22, 5:48 PM EDTSevere Thunderstorm WarningPBZ42 min
Jul 22, 8:13 PM EDTMesoscale DiscussionSPC62 min
Jul 25, 8:58 AM EDTSpecial Weather StatementPBZ62 min
Jul 25, 11:37 AM EDTSevere Thunderstorm WatchSPC7 hr
Jul 25, 3:16 PM EDTMesoscale DiscussionSPC59 min
Jul 25, 3:48 PM EDTSpecial Weather StatementPBZ42 min
Jul 25, 4:29 PM EDTSpecial Weather StatementPBZ46 min
Jul 25, 5:30 PM EDTSpecial Weather StatementPBZ30 min
Jul 25, 6:03 PM EDTSpecial Weather StatementPBZ27 min
Jul 28, 4:03 PM EDTSevere Thunderstorm WatchSPC6 hr
Jul 28, 4:28 PM EDTSevere Thunderstorm WarningPBZ47 min
Jul 28, 5:01 PM EDTSpecial Weather StatementPBZ29 min
Jul 28, 5:01 PM EDTSevere Thunderstorm WarningPBZ44 min
Jul 28, 6:16 PM EDTSevere Thunderstorm WarningPBZ59 min
Jul 28, 7:02 PM EDTMesoscale DiscussionSPC58 min
Jul 28, 7:10 PM EDTAreal Flood AdvisoryPBZ3 hr
Jul 29, 2:06 PM EDTMesoscale DiscussionSPC84 min
Jul 29, 2:17 PM EDTSpecial Weather StatementPBZ28 min
Jul 29, 4:40 PM EDTMesoscale DiscussionSPC95 min
Jul 29, 4:50 PM EDTSevere Thunderstorm WarningPBZ40 min
Aug 1, 3:11 PM EDTSpecial Weather StatementPBZ49 min
Aug 1, 3:20 PM EDTSevere Thunderstorm WarningPBZ40 min
Aug 1, 3:52 PM EDTSevere Thunderstorm WarningPBZ23 min
Aug 1, 4:42 PM EDTSpecial Weather StatementPBZ48 min
Aug 7, 3:08 AM EDTFlash Flood WarningPBZ3 hr
Aug 8, 3:28 PM EDTSpecial Weather StatementPBZ47 min
Aug 19, 10:07 AM EDTSpecial Weather StatementPBZ53 min
Aug 21, 4:13 PM EDTSevere Thunderstorm WarningPBZ62 min
Aug 24, 11:48 PM EDTMesoscale DiscussionSPC87 min
Aug 25, 12:42 AM EDTSevere Thunderstorm WatchSPC5 hr
Aug 25, 2:31 AM EDTMesoscale DiscussionSPC119 min
Aug 25, 5:00 AM EDTSpecial Weather StatementPBZ60 min
Sep 1, 7:49 AM EDTSpecial Weather StatementPBZ56 min
Sep 4, 1:33 PM EDTMesoscale DiscussionSPC87 min
Sep 5, 10:29 PM EDTRiver Flood WatchPBZ35 hr
Sep 9, 8:23 PM EDTSpecial Weather StatementPBZ52 min
Sep 9, 9:25 PM EDTSpecial Weather StatementPBZ50 min
Sep 10, 8:35 AM EDTSpecial Weather StatementPBZ55 min
Sep 10, 9:12 AM EDTAreal Flood AdvisoryPBZ3 hr
Sep 10, 10:48 AM EDTAreal Flood WarningPBZ4 hr
Nov 14, 8:41 PM ESTMesoscale DiscussionSPC2 hr
Nov 14, 9:48 PM ESTSpecial Weather StatementPBZ57 min
Nov 22, 9:07 PM ESTAreal Flood WarningPBZ6 hr
Dec 15, 4:51 PM ESTSpecial Weather StatementPBZ69 min
Dec 15, 6:19 PM ESTSpecial Weather StatementPBZ86 min
Dec 21, 3:49 PM ESTSpecial Weather StatementPBZ26 min
Dec 21, 4:18 PM ESTSpecial Weather StatementPBZ42 min

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 archive20102012

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.