Alert archive / Pennsylvania / Jefferson County

Weather alerts in Jefferson County, Pennsylvania, 2022

104 weather alerts in 2022, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Jefferson County and its neighbors

Each county as a circle sized by its count in 2022. Tap one for its archive.

Alerts
104
Warnings
26
Watches
16
Advisories
17
Busiest month
June20 alerts
Busiest day
June 16, 20225 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 2 tornado warnings covering Jefferson County in 2022 had a tornado report inside them.

Jefferson County, 2022

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings20100%0
Severe thunderstorm warnings141029%989%12 min
Flash flood warnings00

Each office's whole area, 2022

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Pittsburgh, PA: tornado warnings19289%560%17 min
NWS Pittsburgh, PA: severe thunderstorm warnings22417024%54385%21 min
NWS Pittsburgh, PA: flash flood warnings292031%4598%40 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, 3:20 AM ESTWinter Weather AdvisoryPBZ28 hr
Jan 8, 10:37 PM ESTMesoscale DiscussionSPC4 hr
Jan 14, 4:09 AM ESTWinter Storm WatchPBZ32 hr
Jan 15, 12:33 PM ESTWinter Storm WarningPBZ54 hr
Jan 16, 4:24 PM ESTMesoscale DiscussionSPC6 hr
Jan 22, 2:43 PM ESTWinter Weather AdvisoryPBZ28 hr
Jan 24, 8:33 AM ESTWinter Weather AdvisoryPBZ22 hr
Jan 26, 1:17 PM ESTWind Chill AdvisoryPBZ19 hr
Jan 28, 12:26 PM ESTWind Chill AdvisoryPBZ45 hr
Feb 2, 1:50 PM ESTWinter Weather AdvisoryPBZ44 hr
Feb 3, 10:50 PM ESTMesoscale DiscussionSPC4 hr
Feb 16, 11:09 AM ESTFlood WatchPBZ37 hr
Feb 16, 12:10 PM ESTRiver Flood WatchPBZ34 hr
Feb 17, 10:58 AM ESTRiver Flood WarningPBZ41 hr
Feb 19, 5:56 AM ESTMesoscale DiscussionSPC5 hr
Feb 19, 9:13 AM ESTSpecial Weather StatementPBZ47 min
Feb 21, 11:25 PM ESTFlood WatchPBZ18 hr
Feb 24, 3:58 AM ESTWinter Weather AdvisoryPBZ30 hr
Feb 24, 9:13 PM ESTMesoscale DiscussionSPC5 hr
Mar 5, 12:49 PM ESTWind AdvisoryPBZ30 hr
Mar 7, 3:53 PM ESTMesoscale DiscussionSPC2 hr
Mar 7, 4:38 PM ESTSpecial Weather StatementPBZ52 min
Mar 10, 2:43 AM ESTWinter Storm WatchPBZ25 hr
Mar 11, 3:32 AM ESTWinter Storm WarningPBZ37 hr
Mar 12, 2:33 AM ESTMesoscale DiscussionSPC6 hr
Mar 13, 1:58 PM EDTSpecial Weather StatementPBZ47 min
Mar 13, 2:43 PM EDTSpecial Weather StatementPBZ62 min
Mar 29, 12:52 PM EDTWinter Weather AdvisoryPBZ21 hr
Mar 31, 11:54 AM EDTTornado WarningPBZ21 min
Mar 31, 11:57 AM EDTSevere Thunderstorm Warning Considerable damage threatPBZ48 min
Mar 31, 12:06 PM EDTTornado WarningPBZ24 min
Mar 31, 12:07 PM EDTMesoscale DiscussionSPC83 min
Apr 14, 9:37 AM EDTSpecial Weather StatementPBZ83 min
Apr 15, 6:30 AM EDTWind AdvisoryPBZ13 hr
May 6, 7:29 AM EDTFlood WatchPBZ25 hr
May 7, 12:27 AM EDTAreal Flood WarningPBZ20 hr
May 16, 8:40 PM EDTSpecial Weather StatementPBZ50 min
May 21, 8:41 PM EDTSpecial Weather StatementPBZ34 min
May 21, 9:26 PM EDTSpecial Weather StatementPBZ19 min
Jun 1, 1:00 PM EDTMesoscale DiscussionSPC90 min
Jun 1, 2:19 PM EDTSevere Thunderstorm WatchSPC8 hr
Jun 1, 4:47 PM EDTMesoscale DiscussionSPC88 min
Jun 1, 7:04 PM EDTMesoscale DiscussionSPC86 min
Jun 1, 8:08 PM EDTSevere Thunderstorm WarningPBZ37 min
Jun 1, 8:59 PM EDTSpecial Weather StatementPBZ31 min
Jun 1, 9:04 PM EDTSevere Thunderstorm WarningPBZ12 min
Jun 7, 2:09 PM EDTMesoscale DiscussionSPC2 hr
Jun 7, 6:07 PM EDTSpecial Weather StatementPBZ23 min
Jun 8, 11:46 PM EDTSpecial Weather StatementPBZ44 min
Jun 16, 2:14 PM EDTSevere Thunderstorm WatchSPC11 hr
Jun 16, 4:56 PM EDTSevere Thunderstorm WarningPBZ19 min
Jun 16, 5:08 PM EDTSevere Thunderstorm WarningPBZ52 min
Jun 16, 5:17 PM EDTSevere Thunderstorm WarningPBZ13 min
Jun 16, 5:26 PM EDTSpecial Weather StatementPBZ34 min
Jun 22, 2:24 PM EDTMesoscale DiscussionSPC96 min
Jun 22, 3:40 PM EDTSevere Thunderstorm WatchSPC6 hr
Jun 22, 4:13 PM EDTSevere Thunderstorm WarningPBZ32 min
Jun 22, 4:53 PM EDTSevere Thunderstorm WarningPBZ52 min
Jun 22, 5:48 PM EDTSevere Thunderstorm WarningPBZ42 min
Jul 1, 8:35 PM EDTMesoscale DiscussionSPC85 min
Jul 1, 10:08 PM EDTSpecial Weather StatementPBZ37 min
Jul 22, 12:50 PM EDTMesoscale DiscussionSPC115 min
Jul 24, 1:10 PM EDTMesoscale DiscussionSPC2 hr
Jul 24, 2:30 PM EDTSevere Thunderstorm WatchSPC8 hr
Jul 24, 2:53 PM EDTSevere Thunderstorm WarningPBZ52 min
Jul 24, 3:09 PM EDTSevere Thunderstorm WarningPBZ36 min
Jul 24, 7:58 PM EDTSevere Thunderstorm WarningPBZ32 min
Jul 25, 1:24 AM EDTSevere Thunderstorm WarningPBZ81 min
Jul 25, 1:40 AM EDTTornado WatchSPC3 hr
Jul 25, 2:45 AM EDTSpecial Weather StatementPBZ60 min
Jul 25, 3:30 AM EDTSpecial Weather StatementPBZ60 min
Jul 25, 3:54 AM EDTMesoscale DiscussionSPC96 min
Aug 4, 10:26 AM EDTSpecial Weather StatementPBZ34 min
Aug 4, 3:42 PM EDTSpecial Weather StatementPBZ33 min
Aug 21, 5:53 PM EDTSpecial Weather StatementPBZ37 min
Aug 29, 3:30 PM EDTSpecial Weather StatementPBZ15 min
Aug 29, 4:17 PM EDTSpecial Weather StatementPBZ13 min
Aug 29, 5:13 PM EDTSevere Thunderstorm WarningPBZ32 min
Sep 5, 3:04 AM EDTFlood WatchPBZ20 hr
Sep 25, 2:51 PM EDTMesoscale DiscussionSPC84 min
Sep 25, 3:17 PM EDTSpecial Weather StatementPBZ28 min
Sep 25, 3:36 PM EDTSpecial Weather StatementPBZ24 min
Sep 29, 12:27 PM EDTFrost AdvisoryPBZ21 hr
Oct 8, 9:09 AM EDTFrost AdvisoryPBZ24 hr
Oct 15, 11:40 AM EDTFrost AdvisoryPBZ20 hr
Oct 16, 9:13 AM EDTFreeze WatchPBZ27 hr
Oct 17, 12:30 PM EDTFreeze WarningPBZ21 hr
Oct 19, 3:22 AM EDTFreeze WatchPBZ8 hr
Oct 19, 11:38 AM EDTFreeze WarningPBZ21 hr
Nov 11, 8:34 PM ESTAreal Flood AdvisoryPBZ3 hr
Nov 18, 1:50 PM ESTSnow Squall WarningPBZ55 min
Nov 18, 2:46 PM ESTSnow Squall WarningPBZ29 min
Nov 27, 3:56 PM ESTSpecial Weather StatementPBZ49 min
Nov 30, 10:38 AM ESTSpecial Weather StatementPBZ82 min
Dec 3, 11:55 AM ESTSpecial Weather StatementPBZ50 min
Dec 14, 3:05 AM ESTIce Storm WarningPBZ41 hr
Dec 15, 3:27 AM ESTMesoscale DiscussionSPC5 hr
Dec 21, 2:35 PM ESTWind Chill WatchPBZ20 hr
Dec 22, 3:02 AM ESTHigh Wind WatchPBZ8 hr
Dec 22, 11:01 AM ESTWind Chill WarningPBZ62 hr
Dec 22, 11:01 AM ESTWinter Weather AdvisoryPBZ25 hr
Dec 22, 11:04 AM ESTWind AdvisoryPBZ40 hr
Dec 23, 7:49 AM ESTMesoscale DiscussionSPC4 hr
Dec 24, 9:09 AM ESTWind Chill AdvisoryPBZ16 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 archive20212023

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.