Alert archive / Pennsylvania / Fayette County

Weather alerts in Fayette County, Pennsylvania, 2020

123 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Fayette County and its neighbors

Each county as a circle sized by its count in 2020. Tap one for its archive.

Alerts
123
Warnings
47
Watches
15
Advisories
28
Busiest month
August24 alerts
Busiest day
August 25, 202012 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 Fayette County in 2020 had a tornado report inside them.

Fayette County, 2020

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings10100%0
Severe thunderstorm warnings302227%1385%19 min
Flash flood warnings330%1100%63 min

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 11, 3:15 AM ESTHigh Wind WatchPBZ10 hr
Jan 11, 3:15 AM ESTWind AdvisoryPBZ31 hr
Jan 11, 5:41 PM ESTSpecial Weather StatementPBZ79 min
Jan 17, 2:02 PM ESTWinter Weather AdvisoryPBZ28 hr
Jan 24, 2:56 AM ESTWind AdvisoryPBZ16 hr
Feb 5, 3:44 AM ESTWinter Weather AdvisoryPBZ27 hr
Feb 6, 2:58 PM ESTWinter Weather AdvisoryPBZ28 hr
Feb 7, 5:32 AM ESTMesoscale DiscussionSPC3 hr
Feb 7, 4:46 PM ESTSpecial Weather StatementPBZ59 min
Feb 11, 12:59 PM ESTFlash Flood WatchPBZ42 hr
Feb 26, 3:20 AM ESTWinter Weather AdvisoryPBZ33 hr
Feb 28, 2:06 AM ESTWinter Weather AdvisoryPBZ8 hr
Mar 3, 1:22 PM ESTMesoscale DiscussionSPC113 min
Mar 3, 4:27 PM ESTMesoscale DiscussionSPC2 hr
Mar 3, 8:52 PM ESTSpecial Weather StatementPBZ23 min
Mar 3, 9:20 PM ESTSpecial Weather StatementPBZ25 min
Mar 14, 2:12 PM EDTWinter Weather AdvisoryPBZ21 hr
Mar 20, 12:21 PM EDTSpecial Weather StatementPBZ54 min
Mar 20, 4:32 PM EDTSevere Thunderstorm WarningPBZ28 min
Mar 28, 1:42 PM EDTSevere Thunderstorm WatchSPC6 hr
Mar 28, 4:10 PM EDTFlash Flood WarningPBZ9 hr
Mar 28, 4:54 PM EDTSevere Thunderstorm WarningPBZ51 min
Mar 28, 5:04 PM EDTSevere Thunderstorm WarningPBZ41 min
Mar 28, 5:23 PM EDTFlash Flood WarningPBZ3 hr
Mar 28, 5:38 PM EDTSevere Thunderstorm WarningPBZ37 min
Mar 29, 12:32 AM EDTAreal Flood WarningPBZ8 hr
Mar 29, 1:58 PM EDTWind AdvisoryPBZ7 hr
Apr 7, 11:40 PM EDTSevere Thunderstorm WatchSPC6 hr
Apr 8, 1:39 AM EDTSevere Thunderstorm WarningPBZ51 min
Apr 8, 1:52 AM EDTMesoscale DiscussionSPC83 min
Apr 8, 2:06 AM EDTSpecial Weather StatementPBZ24 min
Apr 11, 2:03 PM EDTHigh Wind WatchPBZ24 hr
Apr 12, 1:44 PM EDTHigh Wind WarningPBZ30 hr
Apr 12, 1:44 PM EDTWind AdvisoryPBZ28 hr
Apr 13, 11:18 AM EDTSevere Thunderstorm WarningPBZ27 min
Apr 21, 3:44 AM EDTFreeze WarningPBZ30 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, 8:19 PM EDTSpecial Weather StatementPBZ56 min
May 11, 2:53 AM EDTFreeze WarningPBZ29 hr
May 12, 11:46 AM EDTFrost AdvisoryPBZ21 hr
May 12, 11:46 AM EDTFreeze WarningPBZ21 hr
May 19, 3:20 AM EDTWind AdvisoryPBZ29 hr
May 23, 3:51 AM EDTDense Fog AdvisoryPBZ5 hr
May 29, 4:54 PM EDTSpecial Weather StatementPBZ36 min
May 29, 5:24 PM EDTSpecial Weather StatementPBZ36 min
May 29, 8:37 PM EDTAreal Flood AdvisoryPBZ113 min
Jun 3, 3:10 PM EDTMesoscale DiscussionSPC2 hr
Jun 4, 12:45 PM EDTMesoscale DiscussionSPC90 min
Jun 4, 12:55 PM EDTSevere Thunderstorm WatchSPC6 hr
Jun 4, 4:43 PM EDTSevere Thunderstorm WarningPBZ77 min
Jun 10, 6:32 PM EDTSevere Thunderstorm WarningPBZ31 min
Jun 10, 6:51 PM EDTSevere Thunderstorm WatchSPC6 hr
Jun 10, 11:24 PM EDTSpecial Weather StatementPBZ51 min
Jun 22, 1:58 PM EDTMesoscale DiscussionSPC3 hr
Jul 7, 6:04 PM EDTSpecial Weather StatementPBZ26 min
Jul 7, 6:20 PM EDTAreal Flood AdvisoryPBZ3 hr
Jul 7, 7:25 PM EDTAreal Flood AdvisoryPBZ2 hr
Jul 8, 3:41 PM EDTHeat AdvisoryPBZ28 hr
Jul 10, 5:27 PM EDTSevere Thunderstorm WarningPBZ33 min
Jul 10, 5:33 PM EDTSevere Thunderstorm WarningPBZ29 min
Jul 10, 5:42 PM EDTFlash Flood WarningPBZ2 hr
Jul 10, 6:12 PM EDTSevere Thunderstorm WarningPBZ33 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 16, 7:57 PM EDTSpecial Weather StatementCTP18 min
Jul 18, 1:26 PM EDTHeat AdvisoryPBZ28 hr
Jul 21, 12:14 PM EDTSpecial Weather StatementPBZ46 min
Jul 22, 10:48 AM EDTMesoscale DiscussionSPC117 min
Jul 27, 8:58 PM EDTSevere Thunderstorm WarningPBZ32 min
Aug 1, 3:57 PM EDTSevere Thunderstorm WatchSPC7 hr
Aug 1, 4:33 PM EDTSpecial Weather StatementPBZ42 min
Aug 24, 1:25 PM EDTSpecial Weather StatementPBZ35 min
Aug 25, 8:18 AM EDTSevere Thunderstorm WarningPBZ27 min
Aug 25, 9:05 AM EDTSevere Thunderstorm WarningPBZ25 min
Aug 25, 1:21 PM EDTSevere Thunderstorm WatchSPC6 hr
Aug 25, 2:26 PM EDTSevere Thunderstorm WarningPBZ23 min
Aug 25, 3:15 PM EDTSevere Thunderstorm WarningPBZ45 min
Aug 25, 3:39 PM EDTSevere Thunderstorm WarningPBZ51 min
Aug 25, 4:20 PM EDTSevere Thunderstorm WarningPBZ40 min
Aug 25, 4:35 PM EDTMesoscale DiscussionSPC85 min
Aug 25, 4:40 PM EDTSpecial Weather StatementPBZ50 min
Aug 25, 5:01 PM EDTSevere Thunderstorm WarningPBZ29 min
Aug 25, 5:05 PM EDTSevere Thunderstorm WarningPBZ25 min
Aug 25, 5:34 PM EDTSpecial Weather StatementPBZ26 min
Aug 27, 2:14 PM EDTMesoscale DiscussionSPC2 hr
Aug 27, 5:32 PM EDTSevere Thunderstorm WatchSPC4 hr
Aug 27, 6:35 PM EDTMesoscale DiscussionSPC115 min
Aug 27, 6:41 PM EDTSevere Thunderstorm WarningPBZ64 min
Aug 27, 7:40 PM EDTSevere Thunderstorm WarningPBZ65 min
Aug 27, 8:42 PM EDTSevere Thunderstorm WarningPBZ48 min
Aug 28, 3:03 PM EDTSevere Thunderstorm WarningPBZ42 min
Aug 28, 3:26 PM EDTSpecial Weather StatementPBZ34 min
Aug 28, 3:28 PM EDTTornado WarningPBZ32 min
Sep 3, 12:20 PM EDTSpecial Weather StatementPBZ25 min
Sep 19, 1:17 PM EDTFrost AdvisoryPBZ20 hr
Sep 21, 3:35 PM EDTFrost AdvisoryPBZ17 hr
Oct 2, 1:10 PM EDTFrost AdvisoryPBZ20 hr
Oct 15, 5:04 PM EDTFreeze WatchPBZ21 hr
Oct 16, 1:34 PM EDTFrost AdvisoryPBZ19 hr
Oct 16, 1:34 PM EDTFreeze WarningPBZ19 hr
Nov 1, 4:00 AM ESTWinter Weather AdvisoryPBZ27 hr
Nov 14, 1:10 PM ESTWind AdvisoryPBZ42 hr
Nov 15, 2:36 PM ESTSevere Thunderstorm WarningPBZ39 min
Nov 15, 3:02 PM ESTSevere Thunderstorm WarningPBZ43 min
Nov 15, 3:16 PM ESTSevere Thunderstorm WarningPBZ44 min
Nov 15, 3:33 PM ESTSevere Thunderstorm WarningPBZ27 min
Nov 15, 3:46 PM ESTSevere Thunderstorm WarningPBZ44 min
Nov 29, 7:35 PM ESTWinter Weather AdvisoryPBZ56 hr
Nov 30, 3:18 AM ESTWinter Storm WarningPBZ48 hr
Dec 14, 4:35 AM ESTWinter Storm WatchPBZ23 hr
Dec 15, 3:46 AM ESTWinter Storm WatchPBZ9 hr
Dec 15, 3:46 AM ESTWinter Storm WarningPBZ49 hr
Dec 16, 5:41 PM ESTSpecial Weather StatementPBZ2 hr
Dec 21, 3:25 AM ESTWinter Weather AdvisoryPBZ30 hr
Dec 23, 4:01 AM ESTWinter Storm WatchPBZ24 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.