Alert archive / Pennsylvania / Perry County

Weather alerts in Perry County, Pennsylvania, 2025

104 weather alerts in 2025, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Perry County and its neighbors

Each county as a circle sized by its count in 2025. Tap one for its archive.

Alerts
104
Warnings
25
Watches
23
Advisories
27
Busiest month
July28 alerts
Busiest day
May 16, 20256 alerts

Over time

By month

Warning verification

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

Perry County, 2025

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings171229%367%30 min
Flash flood warnings30100%0

Each office's whole area, 2025

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS State College, PA: tornado warnings14379%560%13 min
NWS State College, PA: severe thunderstorm warnings21212939%35489%22 min
NWS State College, PA: flash flood warnings783555%10594%77 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 4, 6:01 PM ESTSpecial Weather StatementCTP59 min
Jan 5, 3:11 AM ESTWinter Weather AdvisoryCTP42 hr
Jan 17, 2:43 PM ESTWinter Storm WatchCTP24 hr
Jan 18, 2:37 PM ESTWinter Storm WarningCTP42 hr
Jan 19, 3:38 AM ESTCold Weather AdvisoryCTP3 days
Jan 19, 1:00 PM ESTMesoscale DiscussionSPC5 hr
Jan 19, 1:52 PM ESTSpecial Weather StatementCTP53 min
Jan 28, 1:20 PM ESTWind AdvisoryCTP28 hr
Feb 4, 2:22 PM ESTWinter Weather AdvisoryCTP46 hr
Feb 6, 4:00 AM ESTMesoscale DiscussionSPC5 hr
Feb 7, 1:06 PM ESTWinter Weather AdvisoryCTP38 hr
Feb 8, 3:42 PM ESTMesoscale DiscussionSPC4 hr
Feb 11, 2:59 PM ESTWinter Weather AdvisoryCTP37 hr
Feb 13, 4:31 PM ESTWind AdvisoryCTP5 hr
Feb 14, 4:20 AM ESTWinter Weather AdvisoryCTP53 hr
Feb 15, 2:33 AM ESTHigh Wind WatchCTP25 hr
Feb 15, 12:50 PM ESTMesoscale DiscussionSPC4 hr
Feb 16, 3:12 AM ESTHigh Wind WarningCTP37 hr
Feb 16, 3:12 AM ESTWind AdvisoryCTP37 hr
Feb 16, 10:08 AM ESTDense Fog AdvisoryCTP4 hr
Feb 21, 11:56 AM ESTAreal Flood AdvisoryCTP2 hr
Mar 5, 8:29 PM ESTSpecial Weather StatementCTP31 min
Mar 6, 2:08 AM ESTWind AdvisoryCTP26 hr
Mar 16, 12:50 PM EDTTornado WatchSPC7 hr
Mar 16, 2:07 PM EDTMesoscale DiscussionSPC53 min
Mar 16, 3:58 PM EDTSevere Thunderstorm WarningCTP62 min
Mar 16, 4:26 PM EDTMesoscale DiscussionSPC94 min
Apr 14, 4:05 AM EDTWind AdvisoryCTP40 hr
Apr 16, 3:38 AM EDTFrost AdvisoryCTP29 hr
Apr 29, 3:26 PM EDTSevere Thunderstorm WatchSPC6 hr
Apr 29, 7:16 PM EDTSevere Thunderstorm WarningCTP59 min
May 1, 6:35 PM EDTSevere Thunderstorm WatchSPC4 hr
May 1, 8:30 PM EDTSevere Thunderstorm WarningCTP45 min
May 1, 10:06 PM EDTMesoscale DiscussionSPC114 min
May 3, 2:50 PM EDTMesoscale DiscussionSPC115 min
May 16, 2:32 PM EDTSevere Thunderstorm WatchSPC5 hr
May 16, 4:14 PM EDTMesoscale DiscussionSPC2 hr
May 16, 4:30 PM EDTSevere Thunderstorm WarningCTP75 min
May 16, 5:24 PM EDTSevere Thunderstorm WarningCTP66 min
May 16, 5:37 PM EDTSevere Thunderstorm WarningCTP38 min
May 16, 6:01 PM EDTSevere Thunderstorm WarningCTP44 min
Jun 6, 1:01 PM EDTFlood WatchCTP7 hr
Jun 6, 1:26 PM EDTFlash Flood WarningCTP62 min
Jun 10, 1:40 AM EDTFlash Flood WarningCTP3 hr
Jun 17, 3:14 AM EDTFlood WatchCTP19 hr
Jun 19, 1:22 PM EDTMesoscale DiscussionSPC113 min
Jun 19, 1:46 PM EDTSevere Thunderstorm WatchSPC9 hr
Jun 20, 3:42 AM EDTExtreme Heat WatchCTP23 hr
Jun 21, 3:02 AM EDTExtreme Heat WarningCTP5 days
Jun 26, 12:36 PM EDTFlood WatchCTP10 hr
Jun 26, 1:54 PM EDTMesoscale DiscussionSPC2 hr
Jun 26, 2:20 PM EDTSevere Thunderstorm WatchSPC8 hr
Jun 28, 10:51 AM EDTMesoscale DiscussionSPC114 min
Jun 28, 11:48 AM EDTSevere Thunderstorm WatchSPC8 hr
Jun 28, 2:33 PM EDTMesoscale DiscussionSPC87 min
Jun 28, 4:40 PM EDTMesoscale DiscussionSPC95 min
Jun 30, 12:07 PM EDTMesoscale DiscussionSPC113 min
Jul 1, 2:23 AM EDTFlood WatchCTP20 hr
Jul 1, 11:48 AM EDTMesoscale DiscussionSPC117 min
Jul 1, 12:59 PM EDTSevere Thunderstorm WatchSPC9 hr
Jul 1, 2:27 PM EDTFlash Flood WarningCTP3 hr
Jul 1, 3:17 PM EDTSevere Thunderstorm WarningCTP58 min
Jul 7, 8:20 PM EDTSevere Thunderstorm WarningCTP55 min
Jul 8, 1:42 PM EDTSevere Thunderstorm WatchSPC7 hr
Jul 8, 2:17 PM EDTSevere Thunderstorm WarningCTP43 min
Jul 8, 2:47 PM EDTSevere Thunderstorm WarningCTP43 min
Jul 9, 12:49 PM EDTMesoscale DiscussionSPC116 min
Jul 13, 10:32 AM EDTFlood WatchCTP14 hr
Jul 13, 1:23 PM EDTMesoscale DiscussionSPC3 hr
Jul 14, 2:22 AM EDTFlood WatchCTP17 hr
Jul 16, 12:03 PM EDTFlood WatchCTP12 hr
Jul 17, 3:07 AM EDTHeat AdvisoryCTP17 hr
Jul 24, 1:35 AM EDTHeat AdvisoryCTP41 hr
Jul 25, 1:41 PM EDTSevere Thunderstorm WatchSPC7 hr
Jul 25, 2:44 PM EDTSevere Thunderstorm WarningCTP46 min
Jul 25, 3:22 PM EDTSevere Thunderstorm WarningCTP38 min
Jul 25, 4:19 PM EDTSevere Thunderstorm WarningCTP41 min
Jul 25, 4:58 PM EDTSevere Thunderstorm WarningCTP47 min
Jul 25, 7:09 PM EDTMesoscale DiscussionSPC96 min
Jul 26, 1:00 PM EDTSevere Thunderstorm WarningCTP45 min
Jul 26, 1:51 PM EDTMesoscale DiscussionSPC2 hr
Jul 26, 7:00 PM EDTMesoscale DiscussionSPC90 min
Jul 29, 1:34 AM EDTHeat AdvisoryCTP42 hr
Jul 30, 2:19 PM EDTFlood WatchCTP29 hr
Jul 31, 1:15 PM EDTSevere Thunderstorm WatchSPC7 hr
Aug 16, 1:38 PM EDTSevere Thunderstorm WarningCTP37 min
Aug 17, 3:25 PM EDTMesoscale DiscussionSPC2 hr
Sep 23, 9:57 PM EDTDense Fog AdvisoryCTP12 hr
Sep 25, 3:22 PM EDTMesoscale DiscussionSPC113 min
Sep 28, 3:31 AM EDTDense Fog AdvisoryCTP5 hr
Oct 9, 1:41 AM EDTFreeze WarningCTP31 hr
Oct 19, 7:59 PM EDTMesoscale DiscussionSPC3 hr
Oct 30, 12:46 PM EDTWind AdvisoryCTP35 hr
Nov 4, 1:08 PM ESTWind AdvisoryCTP39 hr
Nov 15, 12:39 PM ESTWind AdvisoryCTP31 hr
Nov 19, 11:28 PM ESTDense Fog AdvisoryCTP12 hr
Nov 28, 4:31 PM ESTSnow Squall WarningCTP29 min
Dec 1, 1:57 AM ESTWinter Weather AdvisoryCTP44 hr
Dec 2, 9:51 AM ESTMesoscale DiscussionSPC3 hr
Dec 18, 1:47 AM ESTWind AdvisoryCTP46 hr
Dec 24, 2:17 AM ESTWinter Storm WatchCTP36 hr
Dec 25, 2:15 PM ESTWinter Weather AdvisoryCTP41 hr
Dec 26, 11:13 AM ESTMesoscale DiscussionSPC5 hr
Dec 28, 12:49 PM ESTWind AdvisoryCTP51 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 archive20242026

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.