Alert archive / Pennsylvania / Union County

Weather alerts in Union County, Pennsylvania, 2022

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

Union County and its neighbors

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

Alerts
124
Warnings
26
Watches
17
Advisories
26
Busiest month
March28 alerts
Busiest day
March 31, 20227 alerts

Over time

By month

Warning verification

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

Union County, 2022

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings10820%0
Flash flood warnings00

Each office's whole area, 2022

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS State College, PA: tornado warnings40100%40%
NWS State College, PA: severe thunderstorm warnings15210829%27886%21 min
NWS State College, PA: flash flood warnings3167%3100%28 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 5, 2:07 PM ESTWinter Weather AdvisoryCTP59 hr
Jan 8, 3:22 AM ESTWinter Weather AdvisoryCTP34 hr
Jan 9, 2:35 AM ESTMesoscale DiscussionSPC5 hr
Jan 9, 6:08 AM ESTIce Storm WarningCTP6 hr
Jan 10, 8:37 PM ESTMesoscale DiscussionSPC2 hr
Jan 10, 10:12 PM ESTSpecial Weather StatementCTP48 min
Jan 10, 10:57 PM ESTSpecial Weather StatementCTP48 min
Jan 14, 4:05 AM ESTWinter Storm WatchCTP35 hr
Jan 15, 2:58 PM ESTWinter Weather AdvisoryCTP43 hr
Jan 16, 3:24 PM ESTMesoscale DiscussionSPC5 hr
Jan 18, 8:51 AM ESTSpecial Weather StatementCTP54 min
Jan 18, 9:50 AM ESTSpecial Weather StatementCTP55 min
Jan 23, 2:09 PM ESTSpecial Weather StatementCTP2 hr
Feb 2, 10:45 PM ESTWinter Weather AdvisoryCTP40 hr
Feb 3, 10:35 AM ESTSpecial Weather StatementCTP85 min
Feb 3, 3:26 PM ESTSpecial Weather StatementCTP2 hr
Feb 3, 9:27 PM ESTAreal Flood AdvisoryCTP3 hr
Feb 4, 12:34 AM ESTAreal Flood AdvisoryCTP8 hr
Feb 4, 5:32 AM ESTMesoscale DiscussionSPC4 hr
Feb 4, 11:03 AM ESTWinter Weather AdvisoryCTP117 min
Feb 17, 3:41 AM ESTWind AdvisoryCTP29 hr
Feb 18, 2:47 PM ESTWind AdvisoryCTP28 hr
Feb 19, 10:09 AM ESTMesoscale DiscussionSPC4 hr
Feb 19, 11:02 AM ESTSnow Squall WarningCTP73 min
Feb 24, 4:11 AM ESTWinter Weather AdvisoryCTP30 hr
Feb 24, 9:13 PM ESTMesoscale DiscussionSPC5 hr
Mar 7, 4:15 AM ESTWind AdvisoryCTP21 hr
Mar 7, 3:53 PM ESTMesoscale DiscussionSPC2 hr
Mar 7, 4:54 PM ESTSevere Thunderstorm WatchSPC4 hr
Mar 7, 5:59 PM ESTSevere Thunderstorm WarningCTP46 min
Mar 7, 6:44 PM ESTSevere Thunderstorm WarningCTP61 min
Mar 8, 3:13 PM ESTWinter Weather AdvisoryCTP26 hr
Mar 11, 4:26 AM ESTWinter Storm WarningCTP37 hr
Mar 12, 9:19 AM ESTSpecial Weather StatementCTP56 min
Mar 12, 10:50 AM ESTSpecial Weather StatementCTP55 min
Mar 12, 12:29 PM ESTSpecial Weather StatementCTP61 min
Mar 12, 1:00 PM ESTSpecial Weather StatementCTP75 min
Mar 12, 5:03 PM ESTWinter Weather AdvisoryCTP8 hr
Mar 18, 12:29 AM EDTDense Fog AdvisoryCTP11 hr
Mar 19, 2:33 PM EDTMesoscale DiscussionSPC3 hr
Mar 28, 12:13 PM EDTSnow Squall WarningCTP77 min
Mar 28, 12:44 PM EDTSnow Squall WarningCTP91 min
Mar 28, 1:29 PM EDTSnow Squall WarningCTP76 min
Mar 28, 2:00 PM EDTSnow Squall WarningCTP60 min
Mar 28, 2:27 PM EDTSnow Squall WarningCTP48 min
Mar 28, 3:06 PM EDTSnow Squall WarningCTP69 min
Mar 29, 1:38 PM EDTWinter Weather AdvisoryCTP24 hr
Mar 31, 12:07 PM EDTMesoscale DiscussionSPC83 min
Mar 31, 2:01 PM EDTSevere Thunderstorm WatchSPC8 hr
Mar 31, 3:40 PM EDTMesoscale DiscussionSPC2 hr
Mar 31, 3:45 PM EDTSevere Thunderstorm WarningCTP30 min
Mar 31, 4:01 PM EDTSevere Thunderstorm WarningCTP44 min
Mar 31, 4:25 PM EDTSevere Thunderstorm Warning Considerable damage threatCTP53 min
Mar 31, 5:17 PM EDTSevere Thunderstorm WarningCTP28 min
Apr 18, 4:43 AM EDTWinter Weather AdvisoryCTP27 hr
Apr 26, 2:49 PM EDTFreeze WatchCTP21 hr
Apr 27, 11:35 AM EDTFreeze WarningCTP20 hr
Apr 27, 2:26 PM EDTFreeze WatchCTP24 hr
Apr 27, 2:54 PM EDTFire Weather WatchCTP36 hr
Apr 28, 1:58 PM EDTFreeze WarningCTP18 hr
Apr 29, 3:16 AM EDTRed Flag WarningCTP19 hr
May 6, 2:58 AM EDTFlood WatchCTP34 hr
May 15, 3:05 PM EDTMesoscale DiscussionSPC85 min
May 15, 3:28 PM EDTSpecial Weather StatementCTP32 min
May 16, 5:27 AM EDTDense Fog AdvisoryCTP4 hr
May 16, 9:44 AM EDTMesoscale DiscussionSPC91 min
May 16, 9:55 AM EDTSevere Thunderstorm WatchSPC4 hr
May 16, 11:22 AM EDTMesoscale DiscussionSPC83 min
May 16, 11:48 AM EDTSpecial Weather StatementCTP42 min
May 20, 10:39 AM EDTMesoscale DiscussionSPC96 min
May 20, 11:35 AM EDTTornado WatchSPC7 hr
May 21, 4:00 AM EDTDense Fog AdvisoryCTP4 hr
May 22, 12:20 PM EDTMesoscale DiscussionSPC2 hr
May 22, 1:53 PM EDTSevere Thunderstorm WatchSPC7 hr
May 27, 12:41 PM EDTSpecial Weather StatementCTP34 min
Jun 1, 2:19 PM EDTSevere Thunderstorm WatchSPC8 hr
Jun 1, 4:47 PM EDTMesoscale DiscussionSPC88 min
Jun 1, 10:47 PM EDTSpecial Weather StatementCTP28 min
Jun 1, 11:21 PM EDTSpecial Weather StatementCTP24 min
Jun 16, 2:43 PM EDTTornado WatchSPC8 hr
Jun 16, 6:21 PM EDTSpecial Weather StatementCTP39 min
Jun 22, 3:46 AM EDTFlood WatchCTP19 hr
Jun 22, 1:16 PM EDTMesoscale DiscussionSPC119 min
Jun 22, 1:34 PM EDTSevere Thunderstorm WatchSPC7 hr
Jun 22, 3:56 PM EDTMesoscale DiscussionSPC94 min
Jun 22, 4:44 PM EDTSpecial Weather StatementCTP31 min
Jun 22, 6:16 PM EDTMesoscale DiscussionSPC119 min
Jul 1, 2:26 PM EDTSevere Thunderstorm WarningCTP49 min
Jul 1, 8:35 PM EDTMesoscale DiscussionSPC85 min
Jul 2, 12:25 AM EDTSevere Thunderstorm WarningCTP32 min
Jul 12, 11:40 AM EDTMesoscale DiscussionSPC2 hr
Jul 12, 1:26 PM EDTSevere Thunderstorm WatchSPC6 hr
Jul 22, 12:50 PM EDTMesoscale DiscussionSPC115 min
Jul 22, 2:42 PM EDTSpecial Weather StatementCTP33 min
Jul 24, 4:45 PM EDTSevere Thunderstorm WarningCTP75 min
Jul 24, 5:00 PM EDTSpecial Weather StatementCTP30 min
Jul 24, 6:13 PM EDTSpecial Weather StatementCTP32 min
Jul 25, 8:00 AM EDTSevere Thunderstorm WarningCTP45 min
Jul 28, 3:32 PM EDTMesoscale DiscussionSPC118 min
Jul 28, 4:15 PM EDTSpecial Weather StatementCTP45 min
Aug 4, 12:19 PM EDTMesoscale DiscussionSPC116 min
Aug 30, 1:01 PM EDTMesoscale DiscussionSPC119 min
Sep 5, 3:41 AM EDTFlood WatchCTP32 hr
Sep 9, 4:16 AM EDTDense Fog AdvisoryCTP5 hr
Sep 25, 5:42 PM EDTSpecial Weather StatementCTP18 min
Sep 25, 6:07 PM EDTSpecial Weather StatementCTP23 min
Oct 8, 11:40 AM EDTFrost AdvisoryCTP20 hr
Oct 13, 12:57 PM EDTMesoscale DiscussionSPC2 hr
Oct 18, 1:21 PM EDTFrost AdvisoryCTP20 hr
Oct 19, 2:27 PM EDTFreeze WarningCTP19 hr
Nov 14, 2:37 PM ESTWinter Weather AdvisoryCTP36 hr
Nov 18, 3:57 PM ESTSnow Squall Warning Significant damage threatCTP93 min
Nov 18, 5:19 PM ESTSnow Squall WarningCTP41 min
Nov 20, 2:07 AM ESTSpecial Weather StatementCTP53 min
Nov 30, 1:23 PM ESTSpecial Weather StatementCTP82 min
Dec 3, 1:33 PM ESTSpecial Weather StatementCTP27 min
Dec 13, 4:24 AM ESTWinter Storm WatchCTP35 hr
Dec 14, 4:17 AM ESTWinter Weather AdvisoryCTP56 hr
Dec 14, 3:53 PM ESTWinter Storm WarningCTP30 hr
Dec 15, 3:27 AM ESTMesoscale DiscussionSPC5 hr
Dec 15, 11:24 AM ESTMesoscale DiscussionSPC4 hr
Dec 21, 3:38 AM ESTWinter Weather AdvisoryCTP37 hr
Dec 22, 1:03 PM ESTWind Chill AdvisoryCTP60 hr
Dec 23, 4:12 AM ESTWinter Weather AdvisoryCTP15 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.