Alert archive / Pennsylvania / Jefferson County
Weather alerts in Jefferson County, Pennsylvania, 2021
115 weather alerts in 2021, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Jefferson County and its neighbors
Each county as a circle sized by its count in 2021. Tap one for its archive.
- Alerts
- 115
- Warnings
- 37
- Watches
- 18
- Advisories
- 18
- Busiest month
- August26 alerts
- Busiest day
- August 12, 202111 alerts
Over time
By month
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 1, 12:55 PM EST | Winter Weather Advisory | PBZ | 5 hr |
| Jan 2, 3:35 PM EST | Winter Weather Advisory | PBZ | 21 hr |
| Jan 16, 8:51 PM EST | Special Weather Statement | PBZ | 39 min |
| Jan 16, 9:32 PM EST | Special Weather Statement | PBZ | 43 min |
| Jan 25, 3:47 AM EST | Winter Weather Advisory | PBZ | 30 hr |
| Jan 26, 8:46 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Jan 30, 3:42 AM EST | Winter Weather Advisory | PBZ | 71 hr |
| Feb 4, 10:13 PM EST | Special Weather Statement | PBZ | 62 min |
| Feb 8, 1:45 PM EST | Winter Weather Advisory | PBZ | 21 hr |
| Feb 13, 8:11 AM EST | Winter Weather Advisory | PBZ | 24 hr |
| Feb 13, 1:55 PM EST | Winter Storm Watch | PBZ | 24 hr |
| Feb 14, 1:49 PM EST | Winter Storm Warning | PBZ | 40 hr |
| Feb 15, 2:44 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 15, 9:16 PM EST | Mesoscale Discussion | SPC | 5 hr |
| Feb 21, 3:30 PM EST | Winter Weather Advisory | PBZ | 20 hr |
| Mar 15, 2:41 PM EDT | Winter Weather Advisory | PBZ | 19 hr |
| Mar 24, 1:03 PM EDT | High Wind Watch | PBZ | 24 hr |
| Mar 25, 1:12 PM EDT | Wind Advisory | PBZ | 27 hr |
| Apr 28, 1:06 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Apr 30, 12:59 AM EDT | Freeze Watch | PBZ | 12 hr |
| Apr 30, 12:59 AM EDT | Wind Advisory | PBZ | 20 hr |
| Apr 30, 12:59 PM EDT | Freeze Warning | PBZ | 20 hr |
| May 4, 2:56 PM EDT | Tornado Warning | PBZ | 19 min |
| May 4, 3:28 PM EDT | Mesoscale Discussion | SPC | 62 min |
| May 8, 4:09 AM EDT | Frost Advisory | PBZ | 28 hr |
| May 10, 12:44 PM EDT | Frost Advisory | PBZ | 14 hr |
| May 12, 11:40 AM EDT | Frost Advisory | PBZ | 20 hr |
| May 23, 1:20 PM EDT | Mesoscale Discussion | SPC | 115 min |
| May 26, 12:16 PM EDT | Mesoscale Discussion | SPC | 119 min |
| May 26, 12:59 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 26, 1:13 PM EDT | Severe Thunderstorm Warning | PBZ | 17 min |
| Jun 9, 1:16 PM EDT | Special Weather Statement | PBZ | 14 min |
| Jun 13, 12:50 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 13, 3:26 PM EDT | Mesoscale Discussion | SPC | 94 min |
| Jun 13, 4:56 PM EDT | Mesoscale Discussion | SPC | 94 min |
| Jun 14, 11:31 AM EDT | Mesoscale Discussion | SPC | 89 min |
| Jun 14, 11:46 AM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 21, 11:59 AM EDT | Mesoscale Discussion | SPC | 91 min |
| Jun 21, 12:31 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 21, 3:37 PM EDT | Severe Thunderstorm Warning | PBZ | 23 min |
| Jun 21, 3:47 PM EDT | Mesoscale Discussion | SPC | 58 min |
| Jun 21, 3:57 PM EDT | Severe Thunderstorm Warning | PBZ | 33 min |
| Jun 29, 2:33 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Jun 30, 11:30 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 30, 11:47 AM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 30, 3:55 PM EDT | Special Weather Statement | PBZ | 35 min |
| Jul 7, 3:31 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 7, 4:33 PM EDT | Severe Thunderstorm Warning | PBZ | 27 min |
| Jul 7, 4:59 PM EDT | Severe Thunderstorm Warning | PBZ | 31 min |
| Jul 7, 5:01 PM EDT | Severe Thunderstorm Warning | PBZ | 29 min |
| Jul 7, 5:06 PM EDT | Severe Thunderstorm Warning | PBZ | 24 min |
| Jul 7, 5:24 PM EDT | Severe Thunderstorm Warning | PBZ | 51 min |
| Jul 11, 2:05 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Jul 11, 2:40 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 11, 4:41 PM EDT | Tornado Warning | PBZ | 14 min |
| Jul 13, 12:48 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Jul 13, 1:37 PM EDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Jul 13, 4:07 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Jul 13, 4:25 PM EDT | Severe Thunderstorm Warning | PBZ | 50 min |
| Jul 13, 4:47 PM EDT | Severe Thunderstorm Warning | PBZ | 43 min |
| Jul 13, 5:08 PM EDT | Severe Thunderstorm Warning | PBZ | 52 min |
| Jul 13, 5:12 PM EDT | Severe Thunderstorm Warning | PBZ | 48 min |
| Jul 13, 5:25 PM EDT | Severe Thunderstorm Warning | PBZ | 50 min |
| Jul 13, 6:08 PM EDT | Severe Thunderstorm Warning | PBZ | 37 min |
| Jul 13, 6:44 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Jul 16, 3:30 PM EDT | Severe Thunderstorm Warning | PBZ | 45 min |
| Jul 16, 3:56 PM EDT | Severe Thunderstorm Warning | PBZ | 49 min |
| Jul 17, 2:46 AM EDT | Flash Flood Watch | PBZ | 15 hr |
| Jul 20, 7:54 PM EDT | Severe Thunderstorm Warning | PBZ | 51 min |
| Jul 20, 8:32 PM EDT | Severe Thunderstorm Warning | PBZ | 43 min |
| Aug 1, 1:50 PM EDT | Severe Thunderstorm Warning | PBZ | 25 min |
| Aug 1, 1:52 PM EDT | Special Weather Statement | PBZ | 38 min |
| Aug 1, 2:21 PM EDT | Special Weather Statement | PBZ | 39 min |
| Aug 11, 11:50 AM EDT | Mesoscale Discussion | SPC | 115 min |
| Aug 11, 2:03 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Aug 12, 12:19 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Aug 12, 1:05 PM EDT | Severe Thunderstorm Warning | PBZ | 25 min |
| Aug 12, 1:11 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Aug 12, 1:26 PM EDT | Severe Thunderstorm Warning | PBZ | 49 min |
| Aug 12, 3:48 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 12, 5:20 PM EDT | Severe Thunderstorm Warning | PBZ | 40 min |
| Aug 12, 6:10 PM EDT | Severe Thunderstorm Warning | PBZ | 50 min |
| Aug 12, 6:13 PM EDT | Flash Flood Warning | PBZ | 3 hr |
| Aug 12, 6:22 PM EDT | Mesoscale Discussion | SPC | 83 min |
| Aug 12, 6:38 PM EDT | Severe Thunderstorm Warning | PBZ | 67 min |
| Aug 12, 6:53 PM EDT | Severe Thunderstorm Warning | PBZ | 37 min |
| Aug 13, 4:46 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 13, 7:49 PM EDT | Mesoscale Discussion | SPC | 56 min |
| Aug 17, 1:28 PM EDT | Flash Flood Watch | PBZ | 27 hr |
| Aug 18, 10:58 AM EDT | Mesoscale Discussion | SPC | 92 min |
| Aug 20, 1:57 AM EDT | Dense Fog Advisory | PBZ | 7 hr |
| Aug 26, 10:31 PM EDT | Flash Flood Warning | PBZ | 3 hr |
| Aug 29, 1:07 PM EDT | Mesoscale Discussion | SPC | 83 min |
| Aug 29, 5:22 PM EDT | Special Weather Statement | PBZ | 38 min |
| Aug 29, 6:22 PM EDT | Areal Flood Advisory | PBZ | 113 min |
| Aug 30, 2:11 AM EDT | Areal Flood Warning | PBZ | 117 min |
| Sep 9, 6:28 AM EDT | Special Weather Statement | PBZ | 2 hr |
| Sep 13, 5:53 PM EDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Sep 13, 5:59 PM EDT | Severe Thunderstorm Warning | PBZ | 46 min |
| Sep 13, 6:44 PM EDT | Severe Thunderstorm Warning | PBZ | 31 min |
| Sep 13, 7:07 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Sep 22, 2:23 PM EDT | Tornado Watch | SPC | 6 hr |
| Sep 22, 4:08 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Sep 22, 6:13 PM EDT | Mesoscale Discussion | SPC | 92 min |
| Oct 15, 11:36 AM EDT | Special Weather Statement | PBZ | 39 min |
| Oct 15, 12:36 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Oct 16, 7:40 AM EDT | Severe Thunderstorm Warning | PBZ | 35 min |
| Oct 16, 8:13 AM EDT | Severe Thunderstorm Warning | PBZ | 17 min |
| Oct 21, 4:32 PM EDT | Special Weather Statement | PBZ | 43 min |
| Oct 21, 5:48 PM EDT | Severe Thunderstorm Warning | PBZ | 27 min |
| Oct 21, 7:56 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Dec 10, 11:02 AM EST | Wind Advisory | PBZ | 34 hr |
| Dec 26, 5:43 PM EST | Winter Weather Advisory | PBZ | 19 hr |
| Dec 27, 6:58 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Dec 29, 4:51 AM EST | Dense Fog Advisory | PBZ | 3 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 | 30 |
| Tornado Warning | 2 |
| Severe Thunderstorm Watch | 12 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 31 |
| Special Weather Statement | 11 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flash Flood Warning | 2 |
| Flash Flood Watch | 2 |
| Areal Flood Advisory | 1 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 9 |
| Cold | |
| Freeze Warning | 1 |
| Freeze Watch | 1 |
| Frost Advisory | 3 |
| Wind and dust | |
| High Wind Watch | 1 |
| Wind Advisory | 3 |
| Fog and smoke | |
| Dense Fog Advisory | 2 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20202022
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. Rebuilt daily.