Alert archive / Pennsylvania / Lancaster County

Weather alerts in Lancaster County, Pennsylvania, 2025

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

Lancaster County and its neighbors

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

Alerts
174
Warnings
64
Watches
28
Advisories
38
Busiest month
July64 alerts
Busiest day
July 1, 202515 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 reports fell inside a warning.

Lancaster County, 2025

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings020%
Severe thunderstorm warnings332621%2796%21 min
Flash flood warnings191426%3697%88 min

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, 3:40 AM ESTWinter Storm WatchCTP24 hr
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 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 6, 7:07 PM ESTDense Fog AdvisoryCTP10 hr
Feb 7, 1:06 PM ESTWinter Weather AdvisoryCTP38 hr
Feb 8, 3:42 PM ESTMesoscale DiscussionSPC4 hr
Feb 8, 6:24 PM ESTMesoscale DiscussionSPC4 hr
Feb 10, 2:31 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 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 16, 3:33 PM ESTSpecial Weather StatementCTP42 min
Mar 6, 2:08 AM ESTWind AdvisoryCTP26 hr
Mar 16, 2:49 AM EDTWind AdvisoryCTP15 hr
Mar 16, 4:26 PM EDTMesoscale DiscussionSPC94 min
Mar 16, 9:32 PM EDTSevere Thunderstorm WarningCTP43 min
Mar 31, 3:33 PM EDTMesoscale DiscussionSPC117 min
Mar 31, 7:00 PM EDTSpecial Weather StatementCTP15 min
Mar 31, 7:13 PM EDTSpecial Weather StatementCTP32 min
Apr 4, 3:25 AM EDTSpecial Weather StatementCTP35 min
Apr 4, 4:02 AM EDTSpecial Weather StatementCTP13 min
Apr 8, 1:21 PM EDTFreeze WarningCTP20 hr
Apr 14, 4:05 AM EDTWind AdvisoryCTP40 hr
Apr 15, 5:05 PM EDTSevere Thunderstorm WarningCTP40 min
Apr 16, 3:38 AM EDTFrost AdvisoryCTP29 hr
Apr 19, 10:58 PM EDTSpecial Weather StatementCTP17 min
May 3, 2:50 PM EDTMesoscale DiscussionSPC115 min
May 3, 4:36 PM EDTSevere Thunderstorm WatchSPC5 hr
May 3, 6:46 PM EDTMesoscale DiscussionSPC59 min
May 6, 12:01 PM EDTMesoscale DiscussionSPC119 min
May 6, 12:46 PM EDTSevere Thunderstorm WarningCTP29 min
May 6, 1:06 PM EDTSevere Thunderstorm WatchSPC6 hr
May 6, 2:43 PM EDTMesoscale DiscussionSPC92 min
May 16, 9:46 AM EDTMesoscale DiscussionSPC119 min
May 16, 2:32 PM EDTSevere Thunderstorm WatchSPC5 hr
May 16, 6:01 PM EDTSevere Thunderstorm WarningCTP44 min
May 30, 2:29 AM EDTFlood WatchCTP23 hr
May 30, 5:01 PM EDTTornado WatchSPC7 hr
May 30, 8:37 PM EDTMesoscale DiscussionSPC113 min
Jun 6, 1:01 PM EDTFlood WatchCTP7 hr
Jun 10, 6:49 AM EDTFlash Flood WarningCTP3 hr
Jun 10, 7:44 AM EDTSevere Thunderstorm WarningCTP31 min
Jun 18, 11:36 AM EDTMesoscale DiscussionSPC114 min
Jun 18, 12:43 PM EDTSevere Thunderstorm WatchSPC6 hr
Jun 18, 2:52 PM EDTMesoscale DiscussionSPC113 min
Jun 19, 1:22 PM EDTMesoscale DiscussionSPC113 min
Jun 19, 1:46 PM EDTSevere Thunderstorm WatchSPC9 hr
Jun 19, 3:22 PM EDTMesoscale DiscussionSPC113 min
Jun 19, 3:56 PM EDTSevere Thunderstorm WarningCTP64 min
Jun 20, 3:42 AM EDTExtreme Heat WatchCTP23 hr
Jun 21, 3:02 AM EDTExtreme Heat WarningCTP5 days
Jun 25, 5:54 PM EDTSevere Thunderstorm WarningCTP51 min
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 26, 5:37 PM EDTSevere Thunderstorm WarningCTP53 min
Jun 26, 6:26 PM EDTSevere Thunderstorm WarningCTP64 min
Jun 26, 6:55 PM EDTMesoscale DiscussionSPC95 min
Jun 27, 10:22 AM EDTFlash Flood WarningCTP3 hr
Jun 28, 10:51 AM EDTMesoscale DiscussionSPC114 min
Jun 28, 4:40 PM EDTMesoscale DiscussionSPC95 min
Jun 28, 7:18 PM EDTSevere Thunderstorm WarningCTP42 min
Jun 28, 7:58 PM EDTSevere Thunderstorm WarningCTP77 min
Jun 28, 8:35 PM EDTFlash Flood WarningCTP3 hr
Jun 30, 12:07 PM EDTMesoscale DiscussionSPC113 min
Jun 30, 5:17 PM EDTSevere Thunderstorm WarningCTP43 min
Jun 30, 5:39 PM EDTFlash Flood WarningCTP3 hr
Jun 30, 8:46 PM EDTFlash Flood WarningCTP4 hr
Jun 30, 10:47 PM EDTFlash Flood Warning EmergencyCatastrophic damage threatCTP4 hr
Jun 30, 10:55 PM EDTSevere Thunderstorm WarningCTP80 min
Jul 1, 12:23 AM EDTSevere Thunderstorm WarningCTP52 min
Jul 1, 1:22 AM EDTRiver Flood WarningCTP37 hr
Jul 1, 2:23 AM EDTFlood WatchCTP20 hr
Jul 1, 2:33 AM EDTAreal Flood WarningCTP3 hr
Jul 1, 11:48 AM EDTMesoscale DiscussionSPC117 min
Jul 1, 12:59 PM EDTSevere Thunderstorm WatchSPC9 hr
Jul 1, 3:02 PM EDTMesoscale DiscussionSPC118 min
Jul 1, 4:28 PM EDTFlash Flood WarningCTP3 hr
Jul 1, 4:29 PM EDTSevere Thunderstorm WarningCTP31 min
Jul 1, 4:32 PM EDTFlash Flood WarningCTP3 hr
Jul 1, 7:27 PM EDTAreal Flood WarningCTP3 hr
Jul 1, 7:32 PM EDTAreal Flood WarningCTP3 hr
Jul 7, 10:01 PM EDTSevere Thunderstorm WarningCTP44 min
Jul 8, 2:18 AM EDTFlood WatchCTP18 hr
Jul 8, 12:34 PM EDTMesoscale DiscussionSPC116 min
Jul 8, 1:42 PM EDTSevere Thunderstorm WatchSPC7 hr
Jul 8, 3:32 PM EDTSevere Thunderstorm WarningCTP43 min
Jul 8, 3:32 PM EDTMesoscale DiscussionSPC118 min
Jul 8, 3:39 PM EDTFlash Flood WarningCTP3 hr
Jul 8, 3:42 PM EDTSevere Thunderstorm WarningCTP48 min
Jul 8, 3:52 PM EDTSevere Thunderstorm WarningCTP38 min
Jul 8, 4:15 PM EDTSevere Thunderstorm WarningCTP45 min
Jul 8, 4:17 PM EDTSevere Thunderstorm WarningCTP43 min
Jul 8, 4:44 PM EDTFlash Flood WarningCTP3 hr
Jul 8, 6:46 PM EDTMesoscale DiscussionSPC119 min
Jul 9, 1:21 AM EDTFlood WatchCTP22 hr
Jul 9, 12:49 PM EDTMesoscale DiscussionSPC116 min
Jul 9, 2:02 PM EDTSevere Thunderstorm WatchSPC8 hr
Jul 9, 4:10 PM EDTSevere Thunderstorm WarningCTP23 min
Jul 9, 4:43 PM EDTMesoscale DiscussionSPC2 hr
Jul 9, 5:52 PM EDTSevere Thunderstorm WarningCTP23 min
Jul 9, 6:14 PM EDTSevere Thunderstorm WarningCTP31 min
Jul 9, 6:19 PM EDTFlash Flood WarningCTP2 hr
Jul 9, 6:30 PM EDTSevere Thunderstorm WarningCTP60 min
Jul 9, 6:40 PM EDTFlash Flood WarningCTP3 hr
Jul 9, 8:44 PM EDTAreal Flood WarningCTP2 hr
Jul 11, 6:50 AM EDTDense Fog AdvisoryCTP2 hr
Jul 13, 10:32 AM EDTFlood WatchCTP14 hr
Jul 14, 2:22 AM EDTFlood WatchCTP17 hr
Jul 14, 2:20 PM EDTFlash Flood WarningCTP6 hr
Jul 14, 2:20 PM EDTMesoscale DiscussionSPC2 hr
Jul 14, 3:57 PM EDTFlash Flood WarningCTP3 hr
Jul 14, 4:42 PM EDTFlash Flood WarningCTP3 hr
Jul 14, 5:36 PM EDTSevere Thunderstorm WarningCTP54 min
Jul 14, 6:42 PM EDTAreal Flood WarningCTP4 hr
Jul 14, 8:17 PM EDTAreal Flood WarningCTP4 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, 7:09 PM EDTMesoscale DiscussionSPC96 min
Jul 26, 1:51 PM EDTMesoscale DiscussionSPC2 hr
Jul 26, 7:38 PM EDTSevere Thunderstorm WarningCTP52 min
Jul 29, 1:34 AM EDTHeat AdvisoryCTP42 hr
Jul 30, 2:19 PM EDTFlood WatchCTP29 hr
Jul 31, 11:29 AM EDTMesoscale DiscussionSPC3 hr
Jul 31, 11:47 AM EDTSevere Thunderstorm WarningCTP43 min
Jul 31, 1:14 PM EDTFlash Flood WarningCTP3 hr
Jul 31, 1:15 PM EDTSevere Thunderstorm WatchSPC7 hr
Jul 31, 2:00 PM EDTFlash Flood WarningCTP3 hr
Jul 31, 4:15 PM EDTAreal Flood WarningCTP2 hr
Aug 13, 3:32 PM EDTSevere Thunderstorm WarningCTP43 min
Aug 13, 5:03 PM EDTFlash Flood WarningCTP117 min
Aug 17, 3:25 PM EDTMesoscale DiscussionSPC2 hr
Aug 17, 4:21 PM EDTSevere Thunderstorm WarningCTP54 min
Aug 17, 5:14 PM EDTSevere Thunderstorm WarningCTP46 min
Aug 17, 6:28 PM EDTMesoscale DiscussionSPC62 min
Sep 4, 10:32 PM EDTDense Fog AdvisoryCTP11 hr
Sep 6, 11:56 AM EDTMesoscale DiscussionSPC94 min
Sep 6, 1:13 PM EDTSevere Thunderstorm WatchSPC7 hr
Sep 6, 3:30 PM EDTSevere Thunderstorm WarningCTP45 min
Sep 13, 6:08 AM EDTDense Fog AdvisoryCTP3 hr
Sep 23, 6:26 PM EDTFlash Flood WarningCTP2 hr
Sep 23, 9:57 PM EDTDense Fog AdvisoryCTP12 hr
Sep 25, 3:22 PM EDTMesoscale DiscussionSPC113 min
Sep 25, 4:02 PM EDTSevere Thunderstorm WarningCTP43 min
Sep 25, 11:14 PM EDTDense Fog AdvisoryCTP10 hr
Oct 9, 1:41 AM EDTFrost AdvisoryCTP31 hr
Oct 16, 1:57 AM EDTFrost AdvisoryCTP31 hr
Oct 24, 11:55 AM EDTFrost AdvisoryCTP21 hr
Oct 25, 1:21 PM EDTFrost AdvisoryCTP20 hr
Oct 30, 12:46 PM EDTWind AdvisoryCTP35 hr
Oct 30, 3:16 PM EDTMesoscale DiscussionSPC119 min
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 25, 10:28 PM ESTDense Fog AdvisoryCTP10 hr
Dec 1, 1:57 AM ESTWinter Weather AdvisoryCTP44 hr
Dec 2, 9:51 AM ESTMesoscale DiscussionSPC3 hr
Dec 12, 11:50 AM ESTWinter Weather AdvisoryCTP67 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 28, 12:49 PM ESTWind AdvisoryCTP51 hr
Dec 28, 9:56 PM ESTDense Fog AdvisoryCTP10 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.