Alert archive / Pennsylvania / Perry County

Weather alerts in Perry County, Pennsylvania, 2019

150 weather alerts in 2019, 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 2019. Tap one for its archive.

Alerts
150
Warnings
34
Watches
28
Advisories
30
Busiest month
May35 alerts
Busiest day
May 29, 201910 alerts

Over time

By month

Warning verification

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

1 of 1 tornado warnings covering Perry County in 2019 had a tornado report inside them; 0 of 2 tornado reports fell inside a warning.

Perry County, 2019

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings110%20%
Severe thunderstorm warnings201430%1182%27 min
Flash flood warnings10100%0

Each office's whole area, 2019

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS State College, PA: tornado warnings21671%1735%7 min
NWS State College, PA: severe thunderstorm warnings28417738%46881%22 min
NWS State College, PA: flash flood warnings221245%3087%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
Jan 7, 4:04 AM ESTWinter Weather AdvisoryCTP32 hr
Jan 11, 2:45 PM ESTWinter Weather AdvisoryCTP52 hr
Jan 17, 4:17 AM ESTWinter Storm WatchCTP33 hr
Jan 17, 4:57 PM ESTSpecial Weather StatementCTP63 min
Jan 17, 5:18 PM ESTWinter Weather AdvisoryCTP11 hr
Jan 18, 4:45 AM ESTWinter Storm WarningCTP53 hr
Jan 19, 2:32 PM ESTWinter Weather AdvisoryCTP20 hr
Jan 19, 6:24 PM ESTMesoscale DiscussionSPC3 hr
Jan 19, 9:33 PM ESTMesoscale DiscussionSPC3 hr
Jan 20, 4:06 AM ESTWind Chill AdvisoryCTP33 hr
Jan 22, 12:45 PM ESTWinter Weather AdvisoryCTP30 hr
Jan 28, 1:27 PM ESTWinter Weather AdvisoryCTP30 hr
Jan 29, 2:31 PM ESTWind Chill AdvisoryCTP63 hr
Jan 30, 9:13 AM ESTSnow Squall WarningCTP47 min
Jan 30, 10:04 AM ESTSnow Squall WarningCTP71 min
Jan 30, 11:07 AM ESTSnow Squall WarningCTP2 hr
Feb 7, 1:37 AM ESTDense Fog AdvisoryCTP9 hr
Feb 10, 12:25 PM ESTWinter Weather AdvisoryCTP64 hr
Feb 10, 3:55 PM ESTWinter Storm WatchCTP21 hr
Feb 11, 3:50 AM ESTWinter Storm WarningCTP38 hr
Feb 11, 3:50 AM ESTWinter Weather AdvisoryCTP9 hr
Feb 12, 4:16 AM ESTMesoscale DiscussionSPC6 hr
Feb 12, 10:48 AM ESTMesoscale DiscussionSPC4 hr
Feb 17, 4:05 AM ESTWinter Weather AdvisoryCTP33 hr
Feb 18, 2:38 PM ESTWinter Storm WatchCTP24 hr
Feb 19, 2:34 PM ESTWinter Storm WarningCTP37 hr
Feb 20, 5:55 AM ESTMesoscale DiscussionSPC6 hr
Feb 20, 6:32 PM ESTMesoscale DiscussionSPC4 hr
Feb 22, 4:12 AM ESTHigh Wind WatchCTP34 hr
Feb 23, 2:24 PM ESTHigh Wind WarningCTP47 hr
Feb 25, 12:54 PM ESTWind AdvisoryCTP6 hr
Mar 1, 12:18 PM ESTWinter Weather AdvisoryCTP17 hr
Mar 1, 3:06 PM ESTWinter Storm WatchCTP37 hr
Mar 3, 4:30 AM ESTWinter Storm WarningCTP20 hr
Mar 22, 4:19 AM EDTWind AdvisoryCTP15 hr
Apr 2, 10:53 AM EDTFire Weather WatchCTP16 hr
Apr 3, 3:07 AM EDTRed Flag WarningCTP18 hr
Apr 14, 5:22 PM EDTFlash Flood WatchCTP10 hr
Apr 14, 6:46 PM EDTTornado WatchSPC8 hr
Apr 14, 9:14 PM EDTMesoscale DiscussionSPC61 min
Apr 14, 11:41 PM EDTSevere Thunderstorm WarningCTP49 min
Apr 14, 11:56 PM EDTMesoscale DiscussionSPC2 hr
Apr 15, 3:49 AM EDTWind AdvisoryCTP16 hr
Apr 18, 2:01 PM EDTFlash Flood WatchCTP42 hr
Apr 19, 5:59 PM EDTMesoscale DiscussionSPC2 hr
Apr 19, 6:34 PM EDTSevere Thunderstorm WatchSPC4 hr
Apr 19, 8:54 PM EDTMesoscale DiscussionSPC96 min
Apr 19, 9:11 PM EDTSevere Thunderstorm WarningCTP34 min
Apr 19, 9:44 PM EDTAreal Flood AdvisoryCTP3 hr
Apr 26, 11:37 AM EDTMesoscale DiscussionSPC113 min
Apr 26, 1:33 PM EDTTornado WatchSPC6 hr
Apr 26, 2:09 PM EDTMesoscale DiscussionSPC2 hr
Apr 26, 2:51 PM EDTSevere Thunderstorm WarningCTP54 min
Apr 26, 3:45 PM EDTSevere Thunderstorm WarningCTP64 min
Apr 27, 4:12 AM EDTWind AdvisoryCTP11 hr
Apr 28, 10:57 AM EDTFrost AdvisoryCTP21 hr
May 3, 6:27 PM EDTMesoscale DiscussionSPC63 min
May 19, 1:27 PM EDTMesoscale DiscussionSPC2 hr
May 19, 2:36 PM EDTSevere Thunderstorm WatchSPC8 hr
May 19, 3:15 PM EDTSpecial Weather StatementCTP45 min
May 19, 3:44 PM EDTSevere Thunderstorm WarningCTP46 min
May 19, 4:23 PM EDTSevere Thunderstorm WarningCTP52 min
May 19, 4:41 PM EDTMesoscale DiscussionSPC94 min
May 19, 5:45 PM EDTSevere Thunderstorm WarningCTP30 min
May 19, 6:16 PM EDTSpecial Weather StatementCTP29 min
May 23, 11:52 AM EDTMesoscale DiscussionSPC83 min
May 23, 1:02 PM EDTSevere Thunderstorm WatchSPC5 hr
May 23, 7:10 PM EDTMesoscale DiscussionSPC65 min
May 23, 9:20 PM EDTSevere Thunderstorm WatchSPC3 hr
May 23, 9:24 PM EDTMesoscale DiscussionSPC2 hr
May 23, 9:26 PM EDTSevere Thunderstorm WarningCTP34 min
May 23, 10:05 PM EDTSevere Thunderstorm WarningCTP55 min
May 25, 8:16 PM EDTMesoscale DiscussionSPC59 min
May 26, 11:14 AM EDTMesoscale DiscussionSPC3 hr
May 28, 1:02 PM EDTMesoscale DiscussionSPC118 min
May 28, 1:13 PM EDTFlash Flood WatchCTP32 hr
May 28, 1:48 PM EDTTornado WatchSPC8 hr
May 28, 4:43 PM EDTMesoscale DiscussionSPC2 hr
May 28, 8:07 PM EDTMesoscale DiscussionSPC113 min
May 29, 12:06 PM EDTMesoscale DiscussionSPC84 min
May 29, 1:10 PM EDTTornado WatchSPC8 hr
May 29, 2:10 PM EDTSpecial Weather StatementCTP35 min
May 29, 3:47 PM EDTSevere Thunderstorm WarningCTP58 min
May 29, 3:47 PM EDTMesoscale DiscussionSPC118 min
May 29, 3:53 PM EDTSevere Thunderstorm WarningCTP32 min
May 29, 4:18 PM EDTTornado WarningCTP16 min
May 29, 4:36 PM EDTSevere Thunderstorm WarningCTP54 min
May 29, 4:58 PM EDTSevere Thunderstorm WarningCTP47 min
May 30, 3:48 AM EDTFlash Flood WatchCTP18 hr
May 30, 12:15 PM EDTMesoscale DiscussionSPC2 hr
May 30, 2:01 PM EDTSevere Thunderstorm WatchSPC5 hr
Jun 1, 7:42 PM EDTSpecial Weather StatementCTP33 min
Jun 1, 8:22 PM EDTSpecial Weather StatementCTP53 min
Jun 1, 8:40 PM EDTAreal Flood AdvisoryCTP3 hr
Jun 17, 3:30 AM EDTFlash Flood WatchCTP42 hr
Jun 18, 12:23 PM EDTMesoscale DiscussionSPC97 min
Jun 19, 1:49 PM EDTFlash Flood WatchCTP10 hr
Jun 20, 4:17 AM EDTFlash Flood WatchCTP24 hr
Jun 20, 1:53 PM EDTMesoscale DiscussionSPC2 hr
Jun 24, 7:17 PM EDTMesoscale DiscussionSPC2 hr
Jun 29, 11:34 AM EDTMesoscale DiscussionSPC86 min
Jun 29, 12:08 PM EDTSevere Thunderstorm WatchSPC9 hr
Jun 29, 12:59 PM EDTSevere Thunderstorm WarningCTP61 min
Jun 29, 1:10 PM EDTSevere Thunderstorm WarningCTP65 min
Jun 29, 1:45 PM EDTMesoscale DiscussionSPC90 min
Jul 2, 3:10 PM EDTMesoscale DiscussionSPC95 min
Jul 4, 3:15 PM EDTAreal Flood AdvisoryCTP3 hr
Jul 6, 1:48 PM EDTMesoscale DiscussionSPC2 hr
Jul 6, 5:46 PM EDTSpecial Weather StatementCTP44 min
Jul 6, 6:50 PM EDTFlash Flood WarningCTP3 hr
Jul 7, 12:01 PM EDTFlash Flood WatchCTP22 hr
Jul 9, 3:48 AM EDTDense Fog AdvisoryCTP5 hr
Jul 16, 3:28 PM EDTMesoscale DiscussionSPC3 hr
Jul 17, 1:03 PM EDTMesoscale DiscussionSPC2 hr
Jul 17, 3:00 PM EDTExcessive Heat WatchCTP24 hr
Jul 18, 3:02 PM EDTExcessive Heat WarningCTP3 days
Jul 18, 3:02 PM EDTHeat AdvisoryCTP53 hr
Jul 20, 4:22 AM EDTExcessive Heat WarningCTP40 hr
Jul 21, 3:07 PM EDTFlash Flood WatchCTP35 hr
Jul 22, 1:11 PM EDTMesoscale DiscussionSPC94 min
Jul 22, 1:55 PM EDTSpecial Weather StatementCTP35 min
Jul 22, 6:40 PM EDTSpecial Weather StatementCTP50 min
Aug 15, 1:15 PM EDTMesoscale DiscussionSPC2 hr
Aug 15, 6:55 PM EDTSevere Thunderstorm WarningCTP65 min
Aug 15, 7:59 PM EDTSevere Thunderstorm WarningCTP61 min
Aug 15, 9:04 PM EDTSpecial Weather StatementCTP26 min
Aug 16, 1:28 PM EDTMesoscale DiscussionSPC2 hr
Aug 18, 6:01 PM EDTSevere Thunderstorm WarningCTP44 min
Aug 20, 4:33 PM EDTSpecial Weather StatementCTP42 min
Aug 22, 2:53 PM EDTMesoscale DiscussionSPC2 hr
Sep 2, 5:03 AM EDTSpecial Weather StatementCTP27 min
Sep 11, 3:08 PM EDTMesoscale DiscussionSPC2 hr
Sep 12, 2:02 PM EDTMesoscale DiscussionSPC118 min
Sep 28, 5:51 PM EDTMesoscale DiscussionSPC114 min
Sep 28, 7:02 PM EDTSpecial Weather StatementCTP28 min
Oct 16, 4:40 AM EDTWind AdvisoryCTP37 hr
Oct 18, 2:48 AM EDTFrost AdvisoryCTP29 hr
Oct 27, 7:37 AM EDTSpecial Weather StatementCTP23 min
Oct 27, 8:06 AM EDTSpecial Weather StatementCTP54 min
Oct 31, 2:56 PM EDTTornado WatchSPC10 hr
Oct 31, 6:27 PM EDTSevere Thunderstorm WarningCTP63 min
Oct 31, 7:08 PM EDTSevere Thunderstorm WarningCTP67 min
Oct 31, 7:58 PM EDTAreal Flood AdvisoryCTP3 hr
Nov 1, 4:17 AM EDTFreeze WatchCTP10 hr
Nov 1, 2:01 PM EDTFreeze WarningCTP19 hr
Nov 26, 2:32 PM ESTWind AdvisoryCTP45 hr
Nov 29, 2:17 PM ESTWinter Weather AdvisoryCTP71 hr
Dec 1, 5:45 AM ESTMesoscale DiscussionSPC6 hr
Dec 13, 8:21 PM ESTDense Fog AdvisoryCTP4 hr
Dec 16, 4:24 AM ESTWinter Weather AdvisoryCTP31 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 archive20182020

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.