Alert archive / Pennsylvania / Washington County

Weather alerts in Washington County, Pennsylvania, 2016

132 weather alerts in 2016, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Washington County and its neighbors

Each county as a circle sized by its count in 2016. Tap one for its archive.

Alerts
132
Warnings
43
Watches
8
Advisories
36
Busiest month
July26 alerts
Busiest day
June 16, 201612 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 Washington County in 2016 had a tornado report inside them; 0 of 1 tornado reports fell inside a warning.

Washington County, 2016

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings10100%10%
Severe thunderstorm warnings272219%1164%13 min
Flash flood warnings550%0

Each office's whole area, 2016

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Pittsburgh, PA: tornado warnings13469%667%3 min
NWS Pittsburgh, PA: severe thunderstorm warnings15511327%34581%20 min
NWS Pittsburgh, PA: flash flood warnings241633%6085%49 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
Dec 31, 8:12 PM ESTWinter Weather AdvisoryPBZ5 hr
Jan 4, 7:13 AM ESTSpecial Weather StatementPBZ92 min
Jan 10, 3:31 AM ESTWind AdvisoryPBZ14 hr
Jan 11, 2:37 PM ESTWinter Weather AdvisoryPBZ40 hr
Jan 12, 11:29 AM ESTSpecial Weather StatementPBZ91 min
Jan 12, 12:57 PM ESTSpecial Weather StatementPBZ93 min
Jan 17, 4:04 AM ESTWind Chill AdvisoryPBZ57 hr
Jan 20, 4:37 PM ESTSpecial Weather StatementPBZ83 min
Jan 21, 3:16 AM ESTWinter Storm WarningPBZ64 hr
Jan 21, 3:16 AM ESTWinter Weather AdvisoryPBZ58 hr
Jan 29, 6:18 AM ESTSpecial Weather StatementPBZ72 min
Feb 7, 8:26 PM ESTWinter Weather AdvisoryPBZ4 days
Feb 12, 3:29 AM ESTWind Chill AdvisoryPBZ54 hr
Feb 12, 9:33 PM ESTSpecial Weather StatementPBZ57 min
Feb 14, 3:45 PM ESTWinter Weather AdvisoryPBZ45 hr
Feb 17, 5:54 PM ESTSpecial Weather StatementPBZ51 min
Feb 17, 8:38 PM ESTSpecial Weather StatementPBZ22 min
Feb 24, 12:33 PM ESTSpecial Weather StatementPBZ3 hr
Feb 29, 2:12 AM ESTWind AdvisoryPBZ7 hr
Mar 1, 3:34 AM ESTWind AdvisoryPBZ27 hr
Mar 14, 8:42 PM EDTSpecial Weather StatementPBZ33 min
Mar 17, 10:31 AM EDTRed Flag WarningPBZ9 hr
Apr 2, 2:07 AM EDTWind AdvisoryPBZ26 hr
Apr 2, 10:43 PM EDTSpecial Weather StatementPBZ47 min
Apr 5, 5:39 AM EDTSpecial Weather StatementPBZ51 min
Apr 5, 6:27 AM EDTSpecial Weather StatementPBZ63 min
Apr 23, 2:07 PM EDTFrost AdvisoryPBZ18 hr
Apr 26, 5:23 AM EDTSpecial Weather StatementPBZ52 min
Apr 26, 3:36 PM EDTSpecial Weather StatementPBZ39 min
May 2, 3:14 AM EDTSevere Thunderstorm WarningPBZ31 min
May 2, 3:58 AM EDTSevere Thunderstorm WarningPBZ32 min
May 10, 6:57 PM EDTSpecial Weather StatementPBZ33 min
May 10, 7:36 PM EDTSpecial Weather StatementPBZ39 min
May 15, 2:22 AM EDTFreeze WatchPBZ12 hr
May 15, 2:18 PM EDTFreeze WarningPBZ18 hr
May 29, 1:30 PM EDTFlash Flood WarningPBZ3 hr
Jun 6, 11:41 AM EDTMesoscale DiscussionSPC64 min
Jun 6, 3:11 PM EDTMesoscale DiscussionSPC3 hr
Jun 6, 9:51 PM EDTAreal Flood AdvisoryPBZ4 hr
Jun 6, 9:58 PM EDTSevere Thunderstorm WarningPBZ12 min
Jun 6, 10:33 PM EDTSevere Thunderstorm WarningPBZ27 min
Jun 11, 2:32 PM EDTMesoscale DiscussionSPC58 min
Jun 16, 10:13 AM EDTSevere Thunderstorm WarningPBZ62 min
Jun 16, 1:08 PM EDTMesoscale DiscussionSPC97 min
Jun 16, 1:58 PM EDTSevere Thunderstorm WatchSPC8 hr
Jun 16, 3:07 PM EDTSevere Thunderstorm WarningPBZ38 min
Jun 16, 3:32 PM EDTAreal Flood AdvisoryPBZ3 hr
Jun 16, 3:43 PM EDTSevere Thunderstorm WarningPBZ62 min
Jun 16, 3:55 PM EDTFlash Flood WatchPBZ11 hr
Jun 16, 3:57 PM EDTFlash Flood WarningPBZ4 hr
Jun 16, 4:12 PM EDTFlash Flood WarningPBZ3 hr
Jun 16, 4:16 PM EDTSevere Thunderstorm WarningPBZ44 min
Jun 16, 4:20 PM EDTMesoscale DiscussionSPC55 min
Jun 16, 4:28 PM EDTFlash Flood WarningPBZ4 hr
Jun 16, 11:53 PM EDTAreal Flood WarningPBZ2 hr
Jun 22, 3:59 AM EDTFlash Flood WatchPBZ32 hr
Jun 23, 9:43 AM EDTSpecial Weather StatementPBZ32 min
Jul 7, 9:08 PM EDTAreal Flood AdvisoryPBZ3 hr
Jul 14, 8:58 PM EDTSevere Thunderstorm WarningPBZ32 min
Jul 19, 12:49 AM EDTSpecial Weather StatementPBZ26 min
Jul 23, 2:34 PM EDTMesoscale DiscussionSPC2 hr
Jul 23, 4:12 PM EDTAreal Flood WarningPBZ3 hr
Jul 23, 4:33 PM EDTSevere Thunderstorm WarningPBZ42 min
Jul 23, 4:57 PM EDTSpecial Weather StatementPBZ48 min
Jul 23, 5:32 PM EDTSevere Thunderstorm WarningPBZ43 min
Jul 23, 5:47 PM EDTSevere Thunderstorm WarningPBZ41 min
Jul 23, 6:28 PM EDTAreal Flood AdvisoryPBZ3 hr
Jul 23, 7:04 PM EDTSpecial Weather StatementPBZ41 min
Jul 24, 1:47 AM EDTHeat AdvisoryPBZ18 hr
Jul 24, 1:03 PM EDTMesoscale DiscussionSPC2 hr
Jul 24, 3:49 PM EDTSevere Thunderstorm WarningPBZ41 min
Jul 24, 3:54 PM EDTMesoscale DiscussionSPC3 hr
Jul 24, 5:45 PM EDTSevere Thunderstorm WarningPBZ28 min
Jul 25, 12:41 PM EDTMesoscale DiscussionSPC64 min
Jul 25, 2:24 PM EDTSevere Thunderstorm WarningPBZ36 min
Jul 25, 3:07 PM EDTSevere Thunderstorm WarningPBZ38 min
Jul 25, 3:41 PM EDTSevere Thunderstorm WarningPBZ49 min
Jul 25, 4:23 PM EDTSevere Thunderstorm WarningPBZ38 min
Jul 30, 9:10 AM EDTAreal Flood AdvisoryPBZ2 hr
Jul 30, 11:15 AM EDTAreal Flood WarningPBZ3 hr
Jul 30, 1:06 PM EDTAreal Flood AdvisoryPBZ3 hr
Jul 30, 8:43 PM EDTAreal Flood AdvisoryPBZ3 hr
Jul 30, 9:05 PM EDTAreal Flood WarningPBZ3 hr
Aug 5, 7:15 PM EDTSevere Thunderstorm WarningPBZ35 min
Aug 14, 2:56 PM EDTAreal Flood AdvisoryPBZ3 hr
Aug 14, 3:31 PM EDTAreal Flood AdvisoryPBZ119 min
Aug 14, 3:52 PM EDTFlash Flood WarningPBZ2 hr
Aug 16, 2:57 PM EDTMesoscale DiscussionSPC2 hr
Aug 16, 5:16 PM EDTSpecial Weather StatementPBZ29 min
Aug 16, 7:04 PM EDTAreal Flood AdvisoryPBZ3 hr
Aug 17, 2:06 PM EDTAreal Flood AdvisoryPBZ3 hr
Aug 17, 3:16 PM EDTAreal Flood AdvisoryPBZ119 min
Aug 19, 2:22 PM EDTSpecial Weather StatementPBZ23 min
Aug 25, 5:42 PM EDTMesoscale DiscussionSPC93 min
Aug 26, 12:27 AM EDTSpecial Weather StatementPBZ33 min
Aug 28, 7:04 PM EDTSevere Thunderstorm WarningPBZ26 min
Aug 28, 7:34 PM EDTSevere Thunderstorm WarningPBZ56 min
Aug 28, 7:35 PM EDTAreal Flood WarningPBZ3 hr
Aug 28, 7:45 PM EDTSpecial Weather StatementPBZ60 min
Sep 7, 3:06 PM EDTMesoscale DiscussionSPC2 hr
Sep 7, 3:48 PM EDTSevere Thunderstorm WarningPBZ27 min
Sep 10, 3:30 PM EDTSevere Thunderstorm WatchSPC6 hr
Sep 10, 8:06 PM EDTMesoscale DiscussionSPC84 min
Sep 17, 4:23 PM EDTMesoscale DiscussionSPC2 hr
Sep 29, 3:13 PM EDTSevere Thunderstorm WarningPBZ62 min
Sep 29, 3:31 PM EDTTornado WarningPBZ29 min
Sep 29, 3:53 PM EDTSevere Thunderstorm WarningPBZ27 min
Sep 29, 3:59 PM EDTSevere Thunderstorm WarningPBZ46 min
Sep 29, 4:28 PM EDTSevere Thunderstorm WarningPBZ32 min
Oct 3, 12:39 AM EDTDense Fog AdvisoryPBZ9 hr
Oct 4, 12:46 AM EDTDense Fog AdvisoryPBZ9 hr
Oct 10, 10:15 AM EDTFrost AdvisoryPBZ23 hr
Oct 13, 2:16 PM EDTFrost AdvisoryPBZ19 hr
Oct 20, 2:36 AM EDTSpecial Weather StatementPBZ39 min
Oct 20, 11:45 AM EDTFlash Flood WatchPBZ21 hr
Oct 20, 2:28 PM EDTMesoscale DiscussionSPC3 hr
Oct 20, 3:46 PM EDTSevere Thunderstorm WatchSPC7 hr
Oct 20, 5:27 PM EDTSevere Thunderstorm WarningPBZ25 min
Nov 17, 3:18 AM ESTDense Fog AdvisoryPBZ7 hr
Dec 11, 2:44 AM ESTFreezing Rain AdvisoryPBZ26 hr
Dec 13, 1:43 PM ESTWinter Weather AdvisoryPBZ8 hr
Dec 14, 10:28 AM ESTWind Chill AdvisoryPBZ47 hr
Dec 15, 2:27 PM ESTWinter Storm WatchPBZ15 hr
Dec 16, 5:05 AM ESTWinter Weather AdvisoryPBZ32 hr
Dec 16, 11:42 PM ESTMesoscale DiscussionSPC5 hr
Dec 18, 3:06 AM ESTAreal Flood AdvisoryPBZ3 hr
Dec 18, 4:07 AM ESTAreal Flood WarningPBZ9 hr
Dec 18, 6:23 AM ESTWinter Weather AdvisoryPBZ6 hr
Dec 18, 5:05 PM ESTAreal Flood WarningPBZ3 hr
Dec 30, 3:07 AM ESTSpecial Weather StatementPBZ53 min
Dec 30, 5:40 AM ESTSpecial Weather StatementPBZ20 min
Dec 30, 10:10 AM ESTSpecial Weather StatementPBZ65 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 archive20152017

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.