Alert archive / Pennsylvania / Lawrence County

Weather alerts in Lawrence County, Pennsylvania, 2020

126 weather alerts in 2020, 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 2020. Tap one for its archive.

Alerts
126
Warnings
47
Watches
10
Advisories
22
Busiest month
June23 alerts
Busiest day
March 28, 202010 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, 2020

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings322619%4269%20 min
Flash flood warnings220%0

Each office's whole area, 2020

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Pittsburgh, PA: tornado warnings10370%838%4 min
NWS Pittsburgh, PA: severe thunderstorm warnings21314333%55583%19 min
NWS Pittsburgh, PA: flash flood warnings241921%4990%83 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 8, 8:16 AM ESTSpecial Weather StatementPBZ59 min
Jan 8, 8:29 AM ESTSnow Squall WarningPBZ61 min
Jan 8, 9:21 AM ESTSnow Squall WarningPBZ39 min
Jan 11, 3:15 AM ESTWind AdvisoryPBZ31 hr
Jan 16, 4:50 PM ESTSpecial Weather StatementPBZ55 min
Jan 16, 5:55 PM ESTSpecial Weather StatementPBZ65 min
Jan 17, 2:02 PM ESTWinter Weather AdvisoryPBZ28 hr
Feb 5, 3:44 AM ESTWinter Weather AdvisoryPBZ27 hr
Feb 6, 2:58 PM ESTWinter Weather AdvisoryPBZ28 hr
Feb 7, 9:14 PM ESTSpecial Weather StatementPBZ61 min
Feb 13, 7:34 PM ESTSpecial Weather StatementPBZ41 min
Feb 13, 8:10 PM ESTSpecial Weather StatementPBZ50 min
Feb 27, 6:00 PM ESTSpecial Weather StatementPBZ45 min
Feb 27, 6:44 PM ESTSpecial Weather StatementPBZ61 min
Feb 27, 10:50 PM ESTSpecial Weather StatementPBZ55 min
Mar 20, 12:40 PM EDTMesoscale DiscussionSPC2 hr
Mar 20, 12:54 PM EDTSpecial Weather StatementPBZ51 min
Mar 20, 1:42 PM EDTSevere Thunderstorm WarningPBZ33 min
Mar 20, 2:03 PM EDTAreal Flood WarningPBZ3 hr
Mar 28, 10:32 AM EDTMesoscale DiscussionSPC88 min
Mar 28, 11:42 AM EDTSpecial Weather StatementPBZ48 min
Mar 28, 12:06 PM EDTSevere Thunderstorm WarningPBZ24 min
Mar 28, 1:42 PM EDTSevere Thunderstorm WatchSPC6 hr
Mar 28, 1:49 PM EDTSevere Thunderstorm WarningPBZ26 min
Mar 28, 2:25 PM EDTSevere Thunderstorm WarningPBZ35 min
Mar 28, 3:17 PM EDTSpecial Weather StatementPBZ28 min
Mar 28, 4:03 PM EDTMesoscale DiscussionSPC87 min
Mar 28, 4:19 PM EDTFlash Flood WarningPBZ3 hr
Mar 28, 7:09 PM EDTAreal Flood WarningPBZ3 hr
Mar 28, 9:58 PM EDTAreal Flood WarningPBZ5 hr
Mar 29, 12:05 PM EDTSevere Thunderstorm WatchSPC4 hr
Mar 29, 1:58 PM EDTWind AdvisoryPBZ7 hr
Apr 7, 10:04 PM EDTMesoscale DiscussionSPC86 min
Apr 7, 11:35 PM EDTSevere Thunderstorm WarningPBZ40 min
Apr 7, 11:40 PM EDTSevere Thunderstorm WatchSPC6 hr
Apr 8, 12:12 AM EDTSpecial Weather StatementPBZ48 min
Apr 8, 12:23 AM EDTSevere Thunderstorm WarningPBZ52 min
Apr 8, 12:30 AM EDTSevere Thunderstorm WarningPBZ30 min
Apr 11, 2:03 PM EDTHigh Wind WatchPBZ24 hr
Apr 12, 1:44 PM EDTWind AdvisoryPBZ28 hr
Apr 29, 10:15 PM EDTSpecial Weather StatementPBZ60 min
May 4, 1:18 PM EDTFrost AdvisoryPBZ19 hr
May 6, 1:01 PM EDTFreeze WarningPBZ20 hr
May 7, 1:13 PM EDTFreeze WarningPBZ45 hr
May 9, 3:17 AM EDTFreeze WarningPBZ28 hr
May 10, 7:28 PM EDTSpecial Weather StatementPBZ47 min
May 11, 2:53 AM EDTFreeze WarningPBZ29 hr
May 12, 11:46 AM EDTFreeze WarningPBZ21 hr
May 15, 1:52 PM EDTMesoscale DiscussionSPC83 min
May 23, 3:51 AM EDTDense Fog AdvisoryPBZ5 hr
May 29, 10:47 AM EDTMesoscale DiscussionSPC118 min
May 29, 2:38 PM EDTSpecial Weather StatementPBZ67 min
May 29, 3:19 PM EDTSpecial Weather StatementPBZ41 min
Jun 3, 8:32 AM EDTMesoscale DiscussionSPC118 min
Jun 4, 12:45 PM EDTMesoscale DiscussionSPC90 min
Jun 4, 12:55 PM EDTSevere Thunderstorm WatchSPC6 hr
Jun 4, 2:14 PM EDTMesoscale DiscussionSPC61 min
Jun 4, 3:05 PM EDTSevere Thunderstorm WarningPBZ55 min
Jun 4, 4:00 PM EDTMesoscale DiscussionSPC90 min
Jun 4, 4:03 PM EDTSevere Thunderstorm WarningPBZ42 min
Jun 4, 4:16 PM EDTSevere Thunderstorm WarningPBZ59 min
Jun 4, 5:11 PM EDTSevere Thunderstorm WarningPBZ23 min
Jun 10, 6:35 PM EDTMesoscale DiscussionSPC85 min
Jun 10, 6:51 PM EDTSevere Thunderstorm WatchSPC6 hr
Jun 10, 9:03 PM EDTMesoscale DiscussionSPC57 min
Jun 10, 9:23 PM EDTSevere Thunderstorm WarningPBZ37 min
Jun 10, 9:52 PM EDTSevere Thunderstorm WarningPBZ38 min
Jun 21, 3:04 PM EDTSpecial Weather StatementPBZ26 min
Jun 21, 3:42 PM EDTSpecial Weather StatementPBZ18 min
Jun 21, 4:38 PM EDTSpecial Weather StatementPBZ37 min
Jun 21, 5:43 PM EDTSevere Thunderstorm WarningPBZ32 min
Jun 21, 5:48 PM EDTSevere Thunderstorm WarningPBZ27 min
Jun 22, 1:58 PM EDTMesoscale DiscussionSPC3 hr
Jun 22, 2:11 PM EDTSpecial Weather StatementPBZ79 min
Jun 27, 2:25 PM EDTSpecial Weather StatementPBZ35 min
Jun 27, 4:27 PM EDTFlash Flood WarningPBZ57 min
Jul 7, 4:28 PM EDTSevere Thunderstorm WarningPBZ32 min
Jul 10, 2:44 PM EDTAreal Flood AdvisoryPBZ4 hr
Jul 10, 2:59 PM EDTSpecial Weather StatementPBZ31 min
Jul 10, 3:25 PM EDTSpecial Weather StatementPBZ50 min
Jul 10, 3:41 PM EDTSevere Thunderstorm WarningPBZ25 min
Jul 10, 4:11 PM EDTMesoscale DiscussionSPC94 min
Jul 10, 5:43 PM EDTSevere Thunderstorm WarningPBZ47 min
Jul 10, 6:30 PM EDTSevere Thunderstorm WarningPBZ45 min
Jul 10, 6:56 PM EDTAreal Flood AdvisoryPBZ18 min
Jul 10, 7:13 PM EDTAreal Flood WarningPBZ107 min
Jul 16, 12:18 PM EDTMesoscale DiscussionSPC117 min
Jul 16, 1:20 PM EDTSevere Thunderstorm WatchSPC8 hr
Jul 16, 3:51 PM EDTMesoscale DiscussionSPC84 min
Jul 18, 1:26 PM EDTHeat AdvisoryPBZ28 hr
Jul 19, 6:44 PM EDTSevere Thunderstorm WarningPBZ46 min
Jul 19, 6:54 PM EDTMesoscale DiscussionSPC66 min
Jul 19, 7:19 PM EDTSevere Thunderstorm WarningPBZ24 min
Jul 27, 5:16 PM EDTSevere Thunderstorm WarningPBZ29 min
Jul 27, 5:32 PM EDTAreal Flood AdvisoryPBZ3 hr
Jul 27, 5:54 PM EDTSpecial Weather StatementPBZ36 min
Jul 29, 1:36 PM EDTMesoscale DiscussionSPC84 min
Aug 1, 6:37 PM EDTSevere Thunderstorm WarningPBZ38 min
Aug 25, 12:02 PM EDTMesoscale DiscussionSPC118 min
Aug 25, 1:21 PM EDTSevere Thunderstorm WatchSPC6 hr
Aug 27, 4:34 PM EDTMesoscale DiscussionSPC86 min
Aug 27, 4:44 PM EDTSevere Thunderstorm WarningPBZ46 min
Aug 27, 4:56 PM EDTSevere Thunderstorm WarningPBZ34 min
Aug 27, 5:26 PM EDTSevere Thunderstorm WarningPBZ64 min
Aug 27, 5:33 PM EDTSevere Thunderstorm WarningPBZ42 min
Aug 28, 8:56 AM EDTSevere Thunderstorm WarningPBZ49 min
Aug 28, 9:40 AM EDTSevere Thunderstorm WarningPBZ50 min
Aug 28, 10:46 AM EDTAreal Flood AdvisoryPBZ3 hr
Aug 28, 12:57 PM EDTAreal Flood AdvisoryPBZ3 hr
Sep 7, 11:46 AM EDTSevere Thunderstorm WarningPBZ29 min
Sep 7, 11:53 AM EDTAreal Flood AdvisoryPBZ3 hr
Sep 7, 1:44 PM EDTAreal Flood AdvisoryPBZ3 hr
Sep 19, 1:17 PM EDTFrost AdvisoryPBZ20 hr
Oct 2, 1:10 PM EDTFrost AdvisoryPBZ20 hr
Oct 15, 5:04 PM EDTFreeze WatchPBZ21 hr
Nov 14, 1:10 PM ESTWind AdvisoryPBZ42 hr
Nov 15, 11:33 AM ESTMesoscale DiscussionSPC57 min
Nov 15, 11:51 AM ESTSevere Thunderstorm WatchSPC3 hr
Nov 15, 2:01 PM ESTSevere Thunderstorm WarningPBZ44 min
Nov 15, 2:40 PM ESTSevere Thunderstorm WarningPBZ50 min
Nov 29, 7:35 PM ESTWinter Weather AdvisoryPBZ56 hr
Nov 30, 3:18 AM ESTWinter Storm WarningPBZ48 hr
Dec 15, 1:05 PM ESTWinter Weather AdvisoryPBZ40 hr
Dec 16, 3:43 PM ESTSpecial Weather StatementPBZ2 hr
Dec 23, 12:39 PM ESTWinter Weather AdvisoryPBZ48 hr
Dec 24, 3:48 AM ESTWinter Storm WarningPBZ33 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 archive20192021

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.