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
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 2 | 0% | |||
| Severe thunderstorm warnings | 33 | 26 | 21% | 27 | 96% | 21 min |
| Flash flood warnings | 19 | 14 | 26% | 36 | 97% | 88 min |
Each office's whole area, 2025
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS State College, PA: tornado warnings | 14 | 3 | 79% | 5 | 60% | 13 min |
| NWS State College, PA: severe thunderstorm warnings | 212 | 129 | 39% | 354 | 89% | 22 min |
| NWS State College, PA: flash flood warnings | 78 | 35 | 55% | 105 | 94% | 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.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 4, 3:40 AM EST | Winter Storm Watch | CTP | 24 hr |
| Jan 5, 3:11 AM EST | Winter Weather Advisory | CTP | 42 hr |
| Jan 17, 2:43 PM EST | Winter Storm Watch | CTP | 24 hr |
| Jan 18, 2:37 PM EST | Winter Storm Warning | CTP | 42 hr |
| Jan 19, 3:38 AM EST | Cold Weather Advisory | CTP | 3 days |
| Jan 19, 1:00 PM EST | Mesoscale Discussion | SPC | 5 hr |
| Jan 28, 1:20 PM EST | Wind Advisory | CTP | 28 hr |
| Feb 4, 2:22 PM EST | Winter Weather Advisory | CTP | 46 hr |
| Feb 6, 4:00 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Feb 6, 7:07 PM EST | Dense Fog Advisory | CTP | 10 hr |
| Feb 7, 1:06 PM EST | Winter Weather Advisory | CTP | 38 hr |
| Feb 8, 3:42 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 8, 6:24 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 10, 2:31 PM EST | Winter Weather Advisory | CTP | 37 hr |
| Feb 13, 4:31 PM EST | Wind Advisory | CTP | 5 hr |
| Feb 14, 4:20 AM EST | Winter Weather Advisory | CTP | 53 hr |
| Feb 15, 2:33 AM EST | High Wind Watch | CTP | 25 hr |
| Feb 16, 3:12 AM EST | High Wind Warning | CTP | 37 hr |
| Feb 16, 3:12 AM EST | Wind Advisory | CTP | 37 hr |
| Feb 16, 10:08 AM EST | Dense Fog Advisory | CTP | 4 hr |
| Feb 16, 3:33 PM EST | Special Weather Statement | CTP | 42 min |
| Mar 6, 2:08 AM EST | Wind Advisory | CTP | 26 hr |
| Mar 16, 2:49 AM EDT | Wind Advisory | CTP | 15 hr |
| Mar 16, 4:26 PM EDT | Mesoscale Discussion | SPC | 94 min |
| Mar 16, 9:32 PM EDT | Severe Thunderstorm Warning | CTP | 43 min |
| Mar 31, 3:33 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Mar 31, 7:00 PM EDT | Special Weather Statement | CTP | 15 min |
| Mar 31, 7:13 PM EDT | Special Weather Statement | CTP | 32 min |
| Apr 4, 3:25 AM EDT | Special Weather Statement | CTP | 35 min |
| Apr 4, 4:02 AM EDT | Special Weather Statement | CTP | 13 min |
| Apr 8, 1:21 PM EDT | Freeze Warning | CTP | 20 hr |
| Apr 14, 4:05 AM EDT | Wind Advisory | CTP | 40 hr |
| Apr 15, 5:05 PM EDT | Severe Thunderstorm Warning | CTP | 40 min |
| Apr 16, 3:38 AM EDT | Frost Advisory | CTP | 29 hr |
| Apr 19, 10:58 PM EDT | Special Weather Statement | CTP | 17 min |
| May 3, 2:50 PM EDT | Mesoscale Discussion | SPC | 115 min |
| May 3, 4:36 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 3, 6:46 PM EDT | Mesoscale Discussion | SPC | 59 min |
| May 6, 12:01 PM EDT | Mesoscale Discussion | SPC | 119 min |
| May 6, 12:46 PM EDT | Severe Thunderstorm Warning | CTP | 29 min |
| May 6, 1:06 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 6, 2:43 PM EDT | Mesoscale Discussion | SPC | 92 min |
| May 16, 9:46 AM EDT | Mesoscale Discussion | SPC | 119 min |
| May 16, 2:32 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 16, 6:01 PM EDT | Severe Thunderstorm Warning | CTP | 44 min |
| May 30, 2:29 AM EDT | Flood Watch | CTP | 23 hr |
| May 30, 5:01 PM EDT | Tornado Watch | SPC | 7 hr |
| May 30, 8:37 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Jun 6, 1:01 PM EDT | Flood Watch | CTP | 7 hr |
| Jun 10, 6:49 AM EDT | Flash Flood Warning | CTP | 3 hr |
| Jun 10, 7:44 AM EDT | Severe Thunderstorm Warning | CTP | 31 min |
| Jun 18, 11:36 AM EDT | Mesoscale Discussion | SPC | 114 min |
| Jun 18, 12:43 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 18, 2:52 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Jun 19, 1:22 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Jun 19, 1:46 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 19, 3:22 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Jun 19, 3:56 PM EDT | Severe Thunderstorm Warning | CTP | 64 min |
| Jun 20, 3:42 AM EDT | Extreme Heat Watch | CTP | 23 hr |
| Jun 21, 3:02 AM EDT | Extreme Heat Warning | CTP | 5 days |
| Jun 25, 5:54 PM EDT | Severe Thunderstorm Warning | CTP | 51 min |
| Jun 26, 12:36 PM EDT | Flood Watch | CTP | 10 hr |
| Jun 26, 1:54 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 26, 2:20 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 26, 5:37 PM EDT | Severe Thunderstorm Warning | CTP | 53 min |
| Jun 26, 6:26 PM EDT | Severe Thunderstorm Warning | CTP | 64 min |
| Jun 26, 6:55 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Jun 27, 10:22 AM EDT | Flash Flood Warning | CTP | 3 hr |
| Jun 28, 10:51 AM EDT | Mesoscale Discussion | SPC | 114 min |
| Jun 28, 4:40 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Jun 28, 7:18 PM EDT | Severe Thunderstorm Warning | CTP | 42 min |
| Jun 28, 7:58 PM EDT | Severe Thunderstorm Warning | CTP | 77 min |
| Jun 28, 8:35 PM EDT | Flash Flood Warning | CTP | 3 hr |
| Jun 30, 12:07 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Jun 30, 5:17 PM EDT | Severe Thunderstorm Warning | CTP | 43 min |
| Jun 30, 5:39 PM EDT | Flash Flood Warning | CTP | 3 hr |
| Jun 30, 8:46 PM EDT | Flash Flood Warning | CTP | 4 hr |
| Jun 30, 10:47 PM EDT | Flash Flood Warning | CTP | 4 hr |
| Jun 30, 10:55 PM EDT | Severe Thunderstorm Warning | CTP | 80 min |
| Jul 1, 12:23 AM EDT | Severe Thunderstorm Warning | CTP | 52 min |
| Jul 1, 1:22 AM EDT | River Flood Warning | CTP | 37 hr |
| Jul 1, 2:23 AM EDT | Flood Watch | CTP | 20 hr |
| Jul 1, 2:33 AM EDT | Areal Flood Warning | CTP | 3 hr |
| Jul 1, 11:48 AM EDT | Mesoscale Discussion | SPC | 117 min |
| Jul 1, 12:59 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jul 1, 3:02 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Jul 1, 4:28 PM EDT | Flash Flood Warning | CTP | 3 hr |
| Jul 1, 4:29 PM EDT | Severe Thunderstorm Warning | CTP | 31 min |
| Jul 1, 4:32 PM EDT | Flash Flood Warning | CTP | 3 hr |
| Jul 1, 7:27 PM EDT | Areal Flood Warning | CTP | 3 hr |
| Jul 1, 7:32 PM EDT | Areal Flood Warning | CTP | 3 hr |
| Jul 7, 10:01 PM EDT | Severe Thunderstorm Warning | CTP | 44 min |
| Jul 8, 2:18 AM EDT | Flood Watch | CTP | 18 hr |
| Jul 8, 12:34 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Jul 8, 1:42 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 8, 3:32 PM EDT | Severe Thunderstorm Warning | CTP | 43 min |
| Jul 8, 3:32 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Jul 8, 3:39 PM EDT | Flash Flood Warning | CTP | 3 hr |
| Jul 8, 3:42 PM EDT | Severe Thunderstorm Warning | CTP | 48 min |
| Jul 8, 3:52 PM EDT | Severe Thunderstorm Warning | CTP | 38 min |
| Jul 8, 4:15 PM EDT | Severe Thunderstorm Warning | CTP | 45 min |
| Jul 8, 4:17 PM EDT | Severe Thunderstorm Warning | CTP | 43 min |
| Jul 8, 4:44 PM EDT | Flash Flood Warning | CTP | 3 hr |
| Jul 8, 6:46 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Jul 9, 1:21 AM EDT | Flood Watch | CTP | 22 hr |
| Jul 9, 12:49 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Jul 9, 2:02 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 9, 4:10 PM EDT | Severe Thunderstorm Warning | CTP | 23 min |
| Jul 9, 4:43 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 9, 5:52 PM EDT | Severe Thunderstorm Warning | CTP | 23 min |
| Jul 9, 6:14 PM EDT | Severe Thunderstorm Warning | CTP | 31 min |
| Jul 9, 6:19 PM EDT | Flash Flood Warning | CTP | 2 hr |
| Jul 9, 6:30 PM EDT | Severe Thunderstorm Warning | CTP | 60 min |
| Jul 9, 6:40 PM EDT | Flash Flood Warning | CTP | 3 hr |
| Jul 9, 8:44 PM EDT | Areal Flood Warning | CTP | 2 hr |
| Jul 11, 6:50 AM EDT | Dense Fog Advisory | CTP | 2 hr |
| Jul 13, 10:32 AM EDT | Flood Watch | CTP | 14 hr |
| Jul 14, 2:22 AM EDT | Flood Watch | CTP | 17 hr |
| Jul 14, 2:20 PM EDT | Flash Flood Warning | CTP | 6 hr |
| Jul 14, 2:20 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 14, 3:57 PM EDT | Flash Flood Warning | CTP | 3 hr |
| Jul 14, 4:42 PM EDT | Flash Flood Warning | CTP | 3 hr |
| Jul 14, 5:36 PM EDT | Severe Thunderstorm Warning | CTP | 54 min |
| Jul 14, 6:42 PM EDT | Areal Flood Warning | CTP | 4 hr |
| Jul 14, 8:17 PM EDT | Areal Flood Warning | CTP | 4 hr |
| Jul 16, 12:03 PM EDT | Flood Watch | CTP | 12 hr |
| Jul 17, 3:07 AM EDT | Heat Advisory | CTP | 17 hr |
| Jul 24, 1:35 AM EDT | Heat Advisory | CTP | 41 hr |
| Jul 25, 1:41 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 25, 7:09 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Jul 26, 1:51 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 26, 7:38 PM EDT | Severe Thunderstorm Warning | CTP | 52 min |
| Jul 29, 1:34 AM EDT | Heat Advisory | CTP | 42 hr |
| Jul 30, 2:19 PM EDT | Flood Watch | CTP | 29 hr |
| Jul 31, 11:29 AM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 31, 11:47 AM EDT | Severe Thunderstorm Warning | CTP | 43 min |
| Jul 31, 1:14 PM EDT | Flash Flood Warning | CTP | 3 hr |
| Jul 31, 1:15 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 31, 2:00 PM EDT | Flash Flood Warning | CTP | 3 hr |
| Jul 31, 4:15 PM EDT | Areal Flood Warning | CTP | 2 hr |
| Aug 13, 3:32 PM EDT | Severe Thunderstorm Warning | CTP | 43 min |
| Aug 13, 5:03 PM EDT | Flash Flood Warning | CTP | 117 min |
| Aug 17, 3:25 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 17, 4:21 PM EDT | Severe Thunderstorm Warning | CTP | 54 min |
| Aug 17, 5:14 PM EDT | Severe Thunderstorm Warning | CTP | 46 min |
| Aug 17, 6:28 PM EDT | Mesoscale Discussion | SPC | 62 min |
| Sep 4, 10:32 PM EDT | Dense Fog Advisory | CTP | 11 hr |
| Sep 6, 11:56 AM EDT | Mesoscale Discussion | SPC | 94 min |
| Sep 6, 1:13 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Sep 6, 3:30 PM EDT | Severe Thunderstorm Warning | CTP | 45 min |
| Sep 13, 6:08 AM EDT | Dense Fog Advisory | CTP | 3 hr |
| Sep 23, 6:26 PM EDT | Flash Flood Warning | CTP | 2 hr |
| Sep 23, 9:57 PM EDT | Dense Fog Advisory | CTP | 12 hr |
| Sep 25, 3:22 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Sep 25, 4:02 PM EDT | Severe Thunderstorm Warning | CTP | 43 min |
| Sep 25, 11:14 PM EDT | Dense Fog Advisory | CTP | 10 hr |
| Oct 9, 1:41 AM EDT | Frost Advisory | CTP | 31 hr |
| Oct 16, 1:57 AM EDT | Frost Advisory | CTP | 31 hr |
| Oct 24, 11:55 AM EDT | Frost Advisory | CTP | 21 hr |
| Oct 25, 1:21 PM EDT | Frost Advisory | CTP | 20 hr |
| Oct 30, 12:46 PM EDT | Wind Advisory | CTP | 35 hr |
| Oct 30, 3:16 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Nov 4, 1:08 PM EST | Wind Advisory | CTP | 39 hr |
| Nov 15, 12:39 PM EST | Wind Advisory | CTP | 31 hr |
| Nov 19, 11:28 PM EST | Dense Fog Advisory | CTP | 12 hr |
| Nov 25, 10:28 PM EST | Dense Fog Advisory | CTP | 10 hr |
| Dec 1, 1:57 AM EST | Winter Weather Advisory | CTP | 44 hr |
| Dec 2, 9:51 AM EST | Mesoscale Discussion | SPC | 3 hr |
| Dec 12, 11:50 AM EST | Winter Weather Advisory | CTP | 67 hr |
| Dec 18, 1:47 AM EST | Wind Advisory | CTP | 46 hr |
| Dec 24, 2:17 AM EST | Winter Storm Watch | CTP | 36 hr |
| Dec 25, 2:15 PM EST | Winter Weather Advisory | CTP | 41 hr |
| Dec 28, 12:49 PM EST | Wind Advisory | CTP | 51 hr |
| Dec 28, 9:56 PM EST | Dense Fog Advisory | CTP | 10 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
| Product | Alerts |
|---|---|
| Severe storms | |
| Severe Thunderstorm Warning | 33 |
| Severe Thunderstorm Watch | 12 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 38 |
| Special Weather Statement | 6 |
| Flooding | |
| Areal Flood Warning | 7 |
| Flash Flood Warning | 19 |
| River Flood Warning | 1 |
| Flood Watch | 10 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 3 |
| Winter Weather Advisory | 8 |
| Heat | |
| Extreme Heat Warning | 1 |
| Extreme Heat Watch | 1 |
| Heat Advisory | 3 |
| Cold | |
| Freeze Warning | 1 |
| Cold Weather Advisory | 1 |
| Frost Advisory | 5 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 1 |
| Wind Advisory | 11 |
| Fog and smoke | |
| Dense Fog Advisory | 10 |
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.