Alert archive / Pennsylvania / Perry County
Weather alerts in Perry County, Pennsylvania, 2024
129 weather alerts in 2024, 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 2024. Tap one for its archive.
- Alerts
- 129
- Warnings
- 28
- Watches
- 20
- Advisories
- 41
- Busiest month
- August32 alerts
- Busiest day
- August 6, 20248 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, 2024
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 14 | 11 | 21% | 19 | 47% | 28 min |
| Flash flood warnings | 2 | 1 | 50% | 2 | 100% | 97 min |
Each office's whole area, 2024
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS State College, PA: tornado warnings | 16 | 0 | 100% | 4 | 0% | |
| NWS State College, PA: severe thunderstorm warnings | 188 | 125 | 34% | 422 | 74% | 20 min |
| NWS State College, PA: flash flood warnings | 33 | 23 | 30% | 65 | 78% | 59 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, 2:29 PM EST | Winter Storm Watch | CTP | 22 hr |
| Jan 5, 12:23 PM EST | Winter Storm Warning | CTP | 37 hr |
| Jan 6, 11:47 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Jan 6, 4:27 PM EST | Mesoscale Discussion | SPC | 5 hr |
| Jan 8, 2:14 AM EST | Flood Watch | CTP | 49 hr |
| Jan 8, 4:08 AM EST | Wind Advisory | CTP | 62 hr |
| Jan 9, 11:40 AM EST | Special Weather Statement | CTP | 95 min |
| Jan 9, 6:00 PM EST | Areal Flood Advisory | CTP | 3 hr |
| Jan 9, 9:27 PM EST | Areal Flood Warning | CTP | 7 hr |
| Jan 9, 10:27 PM EST | River Flood Warning | CTP | 15 hr |
| Jan 12, 4:14 AM EST | Wind Advisory | CTP | 41 hr |
| Jan 14, 2:34 AM EST | Wind Advisory | CTP | 14 hr |
| Jan 14, 8:25 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Jan 15, 4:01 AM EST | Winter Weather Advisory | CTP | 34 hr |
| Jan 18, 4:25 AM EST | Winter Weather Advisory | CTP | 66 hr |
| Jan 25, 10:43 AM EST | Dense Fog Advisory | CTP | 22 hr |
| Feb 10, 2:46 PM EST | Winter Storm Watch | CTP | 48 hr |
| Feb 11, 2:49 PM EST | Winter Storm Warning | CTP | 43 hr |
| Feb 15, 3:50 PM EST | Wind Advisory | CTP | 18 hr |
| Feb 16, 3:03 AM EST | Winter Weather Advisory | CTP | 28 hr |
| Feb 16, 1:39 PM EST | Winter Storm Warning | CTP | 17 hr |
| Feb 16, 10:33 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 17, 11:34 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Feb 27, 2:47 PM EST | Wind Advisory | CTP | 37 hr |
| Feb 27, 11:26 PM EST | Special Weather Statement | CTP | 34 min |
| Feb 28, 4:43 PM EST | Special Weather Statement | CTP | 47 min |
| Mar 9, 3:20 AM EST | Wind Advisory | CTP | 62 hr |
| Mar 20, 3:16 AM EDT | Wind Advisory | CTP | 17 hr |
| Apr 1, 2:08 PM EDT | Flood Watch | CTP | 60 hr |
| Apr 3, 3:38 PM EDT | River Flood Warning | CTP | 8 hr |
| Apr 12, 10:25 AM EDT | Wind Advisory | CTP | 32 hr |
| Apr 14, 3:29 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 20, 11:26 AM EDT | Frost Advisory | CTP | 21 hr |
| Apr 21, 11:54 AM EDT | Frost Advisory | CTP | 20 hr |
| Apr 22, 9:45 AM EDT | Frost Advisory | CTP | 22 hr |
| Apr 24, 1:53 PM EDT | Frost Advisory | CTP | 17 hr |
| Apr 25, 1:32 PM EDT | Frost Advisory | CTP | 18 hr |
| May 8, 4:19 AM EDT | Special Weather Statement | CTP | 26 min |
| May 20, 5:18 AM EDT | Dense Fog Advisory | CTP | 4 hr |
| May 22, 3:00 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 22, 4:39 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 22, 6:31 PM EDT | Severe Thunderstorm Warning | CTP | 59 min |
| May 25, 4:18 PM EDT | Special Weather Statement | CTP | 27 min |
| May 25, 5:44 PM EDT | Areal Flood Advisory | CTP | 91 min |
| May 25, 6:50 PM EDT | Special Weather Statement | CTP | 25 min |
| May 26, 12:09 AM EDT | Dense Fog Advisory | CTP | 10 hr |
| May 27, 11:53 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 27, 1:42 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 27, 4:40 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Jun 14, 2:34 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Jun 16, 3:20 PM EDT | Heat Advisory | CTP | 7 days |
| Jun 17, 7:50 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Jun 23, 3:23 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 23, 4:33 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 23, 7:20 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Jun 26, 4:02 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Jun 26, 9:52 PM EDT | Severe Thunderstorm Warning | CTP | 38 min |
| Jun 26, 10:30 PM EDT | Severe Thunderstorm Warning | CTP | 45 min |
| Jun 29, 1:11 PM EDT | Tornado Watch | SPC | 7 hr |
| Jun 29, 4:09 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Jun 29, 5:14 PM EDT | Severe Thunderstorm Warning | CTP | 46 min |
| Jun 29, 5:40 PM EDT | Severe Thunderstorm Warning | CTP | 50 min |
| Jun 29, 5:57 PM EDT | Severe Thunderstorm Warning | CTP | 48 min |
| Jun 30, 11:09 AM EDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Jul 4, 5:54 PM EDT | Areal Flood Advisory | CTP | 96 min |
| Jul 5, 2:48 AM EDT | Heat Advisory | CTP | 41 hr |
| Jul 7, 2:40 PM EDT | Heat Advisory | CTP | 3 days |
| Jul 10, 12:06 PM EDT | Tornado Watch | SPC | 11 hr |
| Jul 10, 7:17 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Jul 10, 7:48 PM EDT | Severe Thunderstorm Warning | CTP | 72 min |
| Jul 13, 2:42 AM EDT | Excessive Heat Watch | CTP | 35 hr |
| Jul 13, 2:42 AM EDT | Heat Advisory | CTP | 4 days |
| Jul 14, 1:54 PM EDT | Excessive Heat Warning | CTP | 54 hr |
| Jul 15, 10:56 AM EDT | Heat Advisory | CTP | 57 hr |
| Jul 16, 2:35 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Jul 30, 12:39 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 30, 7:31 PM EDT | Areal Flood Advisory | CTP | 59 min |
| Jul 31, 4:17 AM EDT | Heat Advisory | CTP | 64 hr |
| Aug 3, 12:14 PM EDT | Flood Watch | CTP | 9 hr |
| Aug 3, 1:01 PM EDT | Severe Thunderstorm Warning | CTP | 44 min |
| Aug 3, 1:42 PM EDT | Flash Flood Warning | CTP | 76 min |
| Aug 3, 2:53 PM EDT | Mesoscale Discussion | SPC | 67 min |
| Aug 6, 10:59 AM EDT | Mesoscale Discussion | SPC | 91 min |
| Aug 6, 11:42 AM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 6, 2:10 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Aug 6, 4:29 PM EDT | Mesoscale Discussion | SPC | 61 min |
| Aug 6, 4:33 PM EDT | Severe Thunderstorm Warning | CTP | 57 min |
| Aug 6, 4:52 PM EDT | Severe Thunderstorm Warning | CTP | 38 min |
| Aug 6, 5:23 PM EDT | Severe Thunderstorm Warning | CTP | 37 min |
| Aug 6, 5:32 PM EDT | Severe Thunderstorm Warning | CTP | 43 min |
| Aug 7, 3:24 PM EDT | Flood Watch | CTP | 48 hr |
| Aug 9, 4:38 AM EDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 9, 6:17 AM EDT | Tornado Watch | SPC | 8 hr |
| Aug 9, 8:34 AM EDT | Areal Flood Warning | CTP | 7 hr |
| Aug 9, 9:00 AM EDT | Areal Flood Warning | CTP | 6 hr |
| Aug 9, 10:26 AM EDT | Mesoscale Discussion | SPC | 94 min |
| Aug 17, 4:59 AM EDT | Flood Watch | CTP | 42 hr |
| Aug 18, 1:09 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Aug 18, 2:02 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 18, 2:09 PM EDT | Severe Thunderstorm Warning | CTP | 51 min |
| Aug 18, 4:30 PM EDT | Mesoscale Discussion | SPC | 90 min |
| Aug 27, 4:05 AM EDT | Heat Advisory | CTP | 40 hr |
| Aug 29, 2:34 PM EDT | Flood Watch | CTP | 9 hr |
| Aug 29, 3:54 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 29, 5:40 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Aug 29, 9:42 PM EDT | Severe Thunderstorm Warning | CTP | 48 min |
| Aug 29, 10:28 PM EDT | Special Weather Statement | CTP | 32 min |
| Aug 29, 10:48 PM EDT | Flash Flood Warning | CTP | 3 hr |
| Aug 30, 12:58 AM EDT | Areal Flood Advisory | CTP | 92 min |
| Aug 30, 1:56 AM EDT | Areal Flood Warning | CTP | 64 min |
| Sep 4, 7:07 AM EDT | Special Weather Statement | CTP | 83 min |
| Sep 5, 4:46 AM EDT | Special Weather Statement | CTP | 4 hr |
| Sep 21, 2:37 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 21, 11:28 PM EDT | Special Weather Statement | CTP | 62 min |
| Oct 2, 10:27 PM EDT | Dense Fog Advisory | CTP | 12 hr |
| Oct 14, 2:34 PM EDT | Frost Advisory | CTP | 18 hr |
| Oct 15, 12:36 PM EDT | Frost Advisory | CTP | 20 hr |
| Oct 16, 1:44 PM EDT | Frost Advisory | CTP | 19 hr |
| Oct 17, 4:18 PM EDT | Frost Advisory | CTP | 16 hr |
| Nov 1, 4:09 AM EDT | Fire Weather Watch | CTP | 6 hr |
| Nov 1, 9:53 AM EDT | Red Flag Warning | CTP | 9 hr |
| Nov 7, 1:57 PM EST | Red Flag Warning | CTP | 28 hr |
| Nov 20, 11:28 AM EST | Wind Advisory | CTP | 14 hr |
| Dec 3, 2:37 PM EST | Wind Advisory | CTP | 52 hr |
| Dec 5, 2:35 AM EST | Special Weather Statement | CTP | 40 min |
| Dec 5, 3:12 AM EST | Special Weather Statement | CTP | 48 min |
| Dec 9, 9:44 PM EST | Dense Fog Advisory | CTP | 11 hr |
| Dec 14, 3:30 AM EST | Winter Weather Advisory | CTP | 55 hr |
| Dec 28, 5:40 PM EST | Dense Fog Advisory | CTP | 15 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 | 14 |
| Severe Thunderstorm Watch | 7 |
| Tornado Watch | 3 |
| Mesoscale Discussion | 28 |
| Special Weather Statement | 12 |
| Flooding | |
| Areal Flood Warning | 4 |
| Flash Flood Warning | 2 |
| River Flood Warning | 2 |
| Flood Watch | 6 |
| Areal Flood Advisory | 5 |
| Winter | |
| Winter Storm Warning | 3 |
| Winter Storm Watch | 2 |
| Winter Weather Advisory | 4 |
| Heat | |
| Excessive Heat Warning | 1 |
| Excessive Heat Watch | 1 |
| Heat Advisory | 7 |
| Cold | |
| Frost Advisory | 9 |
| Wind and dust | |
| Wind Advisory | 10 |
| Fire | |
| Red Flag Warning | 2 |
| Fire Weather Watch | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 6 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20232025
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.