Alert archive / Pennsylvania / Lawrence County

Weather alerts in Lawrence County, Pennsylvania, 2015

128 weather alerts in 2015, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Lawrence County and its neighbors

Each county as a circle sized by its count in 2015. Tap one for its archive.

Alerts
128
Warnings
35
Watches
14
Advisories
34
Busiest month
June47 alerts
Busiest day
June 23, 20158 alerts

Over time

By month

Warning verification

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

Lawrence County, 2015

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings231822%3391%12 min
Flash flood warnings5420%367%164 min

Each office's whole area, 2015

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Pittsburgh, PA: tornado warnings13192%250%5 min
NWS Pittsburgh, PA: severe thunderstorm warnings17413324%50584%19 min
NWS Pittsburgh, PA: flash flood warnings493822%14091%106 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 2, 3:25 PM ESTFreezing Rain AdvisoryPBZ18 hr
Jan 3, 9:52 AM ESTFreezing Rain AdvisoryPBZ9 hr
Jan 6, 3:30 PM ESTWind Chill AdvisoryPBZ46 hr
Jan 9, 4:55 AM ESTWind Chill AdvisoryPBZ32 hr
Jan 9, 7:45 AM ESTSpecial Weather StatementPBZ60 min
Jan 11, 3:30 AM ESTWinter Weather AdvisoryPBZ36 hr
Jan 20, 3:30 PM ESTWinter Weather AdvisoryPBZ27 hr
Jan 24, 3:30 PM ESTWinter Weather AdvisoryPBZ62 hr
Jan 24, 5:51 PM ESTFreezing Rain AdvisoryPBZ7 hr
Jan 28, 7:58 PM ESTFreezing Rain AdvisoryPBZ18 hr
Jan 30, 12:06 PM ESTWinter Storm WatchPBZ26 hr
Jan 31, 2:28 PM ESTWinter Storm WarningPBZ44 hr
Jan 31, 2:28 PM ESTWinter Weather AdvisoryPBZ53 hr
Feb 4, 6:17 PM ESTSpecial Weather StatementPBZ3 hr
Feb 9, 12:30 AM ESTFreezing Rain AdvisoryPBZ8 hr
Feb 12, 3:22 AM ESTWind Chill AdvisoryPBZ32 hr
Feb 13, 3:08 AM ESTWind Chill WatchPBZ24 hr
Feb 13, 2:45 PM ESTWinter Weather AdvisoryPBZ33 hr
Feb 14, 2:59 AM ESTWind Chill WarningPBZ55 hr
Feb 14, 1:02 PM ESTSpecial Weather StatementPBZ58 min
Feb 14, 1:33 PM ESTMesoscale DiscussionSPC4 hr
Feb 15, 11:12 AM ESTWind Chill AdvisoryPBZ16 hr
Feb 18, 4:08 AM ESTWind Chill AdvisoryPBZ56 hr
Feb 18, 12:03 PM ESTSpecial Weather StatementPBZ57 min
Feb 18, 9:42 PM ESTWind Chill WarningPBZ38 hr
Feb 20, 2:45 PM ESTWinter Storm WarningPBZ30 hr
Feb 21, 8:15 PM ESTFreezing Rain AdvisoryPBZ8 hr
Feb 22, 4:36 AM ESTWind Chill AdvisoryPBZ54 hr
Feb 23, 4:32 AM ESTWind Chill AdvisoryPBZ30 hr
Feb 27, 3:22 PM ESTWinter Storm WatchPBZ24 hr
Feb 28, 3:11 PM ESTWinter Weather AdvisoryPBZ30 hr
Mar 2, 2:41 PM ESTWinter Weather AdvisoryPBZ28 hr
Mar 7, 12:16 PM ESTSpecial Weather StatementPBZ89 min
Mar 10, 6:03 PM EDTDense Fog AdvisoryPBZ15 hr
Mar 13, 3:03 AM EDTFlood WatchPBZ34 hr
Mar 14, 3:55 PM EDTAreal Flood WarningPBZ20 hr
Apr 9, 4:29 PM EDTSevere Thunderstorm WatchSPC6 hr
Apr 9, 5:05 PM EDTSevere Thunderstorm WarningPBZ25 min
Apr 9, 5:35 PM EDTSpecial Weather StatementPBZ25 min
Apr 9, 5:56 PM EDTSevere Thunderstorm WarningPBZ34 min
Apr 20, 5:17 PM EDTSevere Thunderstorm WarningPBZ43 min
Apr 21, 4:06 AM EDTWind AdvisoryPBZ14 hr
May 11, 4:24 PM EDTMesoscale DiscussionSPC2 hr
May 11, 5:47 PM EDTSevere Thunderstorm WatchSPC4 hr
May 11, 7:26 PM EDTMesoscale DiscussionSPC64 min
May 11, 7:46 PM EDTSevere Thunderstorm WarningPBZ29 min
May 11, 8:02 PM EDTSevere Thunderstorm WarningPBZ43 min
May 11, 8:17 PM EDTSevere Thunderstorm WarningPBZ43 min
May 13, 2:17 PM EDTFrost AdvisoryPBZ18 hr
May 18, 5:32 PM EDTSpecial Weather StatementPBZ28 min
May 22, 3:17 AM EDTFrost AdvisoryPBZ28 hr
May 27, 10:15 PM EDTSpecial Weather StatementPBZ45 min
May 30, 7:23 PM EDTMesoscale DiscussionSPC67 min
May 31, 8:34 AM EDTSpecial Weather StatementPBZ26 min
May 31, 12:51 PM EDTMesoscale DiscussionSPC114 min
May 31, 4:29 PM EDTSevere Thunderstorm WarningPBZ31 min
Jun 5, 4:36 PM EDTSpecial Weather StatementPBZ24 min
Jun 11, 2:47 PM EDTMesoscale DiscussionSPC118 min
Jun 11, 4:30 PM EDTSpecial Weather StatementPBZ30 min
Jun 11, 4:49 PM EDTSevere Thunderstorm WarningPBZ26 min
Jun 11, 6:00 PM EDTSevere Thunderstorm WarningPBZ30 min
Jun 12, 12:52 PM EDTMesoscale DiscussionSPC113 min
Jun 12, 1:14 PM EDTSevere Thunderstorm WatchSPC8 hr
Jun 12, 4:21 PM EDTMesoscale DiscussionSPC84 min
Jun 12, 4:59 PM EDTSevere Thunderstorm WarningPBZ31 min
Jun 12, 5:00 PM EDTSpecial Weather StatementPBZ45 min
Jun 12, 5:22 PM EDTSevere Thunderstorm WarningPBZ23 min
Jun 12, 5:30 PM EDTSevere Thunderstorm WarningPBZ30 min
Jun 14, 2:06 PM EDTMesoscale DiscussionSPC84 min
Jun 14, 3:15 PM EDTFlash Flood WatchPBZ41 hr
Jun 14, 3:30 PM EDTSevere Thunderstorm WarningPBZ45 min
Jun 14, 4:16 PM EDTAreal Flood AdvisoryPBZ3 hr
Jun 14, 6:58 PM EDTSpecial Weather StatementPBZ47 min
Jun 14, 7:59 PM EDTMesoscale DiscussionSPC61 min
Jun 14, 8:11 PM EDTSevere Thunderstorm WarningPBZ49 min
Jun 14, 8:49 PM EDTMesoscale DiscussionSPC56 min
Jun 14, 8:56 PM EDTAreal Flood AdvisoryPBZ3 hr
Jun 14, 8:59 PM EDTSevere Thunderstorm WarningPBZ46 min
Jun 14, 10:01 PM EDTFlash Flood WarningPBZ6 hr
Jun 15, 5:09 PM EDTFlash Flood WarningPBZ3 hr
Jun 15, 8:56 PM EDTFlash Flood WarningPBZ3 hr
Jun 15, 9:13 PM EDTSpecial Weather StatementPBZ47 min
Jun 16, 6:14 AM EDTAreal Flood WarningPBZ15 hr
Jun 18, 4:26 PM EDTSevere Thunderstorm WatchSPC7 hr
Jun 18, 8:10 PM EDTSevere Thunderstorm WarningPBZ50 min
Jun 20, 5:57 PM EDTSpecial Weather StatementPBZ93 min
Jun 21, 4:46 PM EDTSpecial Weather StatementPBZ29 min
Jun 21, 4:55 PM EDTSevere Thunderstorm WarningPBZ35 min
Jun 22, 4:47 PM EDTSevere Thunderstorm WatchSPC3 hr
Jun 23, 5:30 AM EDTMesoscale DiscussionSPC60 min
Jun 23, 8:35 AM EDTSpecial Weather StatementPBZ55 min
Jun 23, 9:42 AM EDTFlash Flood WarningPBZ3 hr
Jun 23, 9:57 AM EDTSevere Thunderstorm WarningPBZ37 min
Jun 23, 11:32 AM EDTSevere Thunderstorm WarningPBZ28 min
Jun 23, 12:02 PM EDTAreal Flood AdvisoryPBZ118 min
Jun 23, 12:38 PM EDTFlash Flood WarningPBZ3 hr
Jun 23, 3:28 PM EDTAreal Flood WarningPBZ6 hr
Jun 26, 3:58 AM EDTFlood WatchPBZ45 hr
Jun 27, 12:29 PM EDTAreal Flood AdvisoryPBZ3 hr
Jun 27, 6:43 PM EDTAreal Flood AdvisoryPBZ5 hr
Jun 30, 12:03 PM EDTMesoscale DiscussionSPC2 hr
Jun 30, 12:58 PM EDTSevere Thunderstorm WatchSPC8 hr
Jun 30, 3:48 PM EDTMesoscale DiscussionSPC117 min
Jul 6, 1:46 PM EDTAreal Flood AdvisoryPBZ3 hr
Jul 7, 4:31 PM EDTMesoscale DiscussionSPC2 hr
Jul 7, 7:05 PM EDTSevere Thunderstorm WarningPBZ25 min
Jul 9, 2:05 PM EDTSevere Thunderstorm WarningPBZ40 min
Jul 14, 11:44 AM EDTMesoscale DiscussionSPC61 min
Jul 14, 12:40 PM EDTSevere Thunderstorm WatchSPC7 hr
Jul 14, 3:12 PM EDTMesoscale DiscussionSPC93 min
Jul 14, 4:20 PM EDTSpecial Weather StatementPBZ40 min
Jul 14, 4:37 PM EDTMesoscale DiscussionSPC83 min
Jul 19, 2:11 PM EDTMesoscale DiscussionSPC2 hr
Jul 19, 3:18 PM EDTSevere Thunderstorm WatchSPC7 hr
Jul 19, 8:32 PM EDTMesoscale DiscussionSPC88 min
Jul 26, 3:34 PM EDTSpecial Weather StatementPBZ26 min
Jul 26, 3:34 PM EDTMesoscale DiscussionSPC116 min
Aug 3, 9:22 PM EDTSevere Thunderstorm WarningPBZ38 min
Aug 10, 9:27 PM EDTSpecial Weather StatementPBZ33 min
Aug 15, 4:28 PM EDTSpecial Weather StatementPBZ17 min
Aug 15, 4:30 PM EDTSevere Thunderstorm WarningPBZ30 min
Sep 11, 4:36 AM EDTDense Fog AdvisoryPBZ5 hr
Sep 19, 4:10 PM EDTMesoscale DiscussionSPC3 hr
Nov 11, 2:14 PM ESTWind AdvisoryPBZ29 hr
Nov 21, 9:18 PM ESTSpecial Weather StatementPBZ72 min
Dec 5, 1:22 AM ESTDense Fog AdvisoryPBZ11 hr
Dec 5, 6:50 PM ESTDense Fog AdvisoryPBZ17 hr
Dec 18, 7:13 PM ESTSpecial Weather StatementPBZ3 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 archive20142016

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.