Alert archive / Pennsylvania / Mercer County
Weather alerts in Mercer County, Pennsylvania, 2022
111 weather alerts in 2022, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Mercer County and its neighbors
Each county as a circle sized by its count in 2022. Tap one for its archive.
- Alerts
- 111
- Warnings
- 33
- Watches
- 14
- Advisories
- 23
- Busiest month
- June21 alerts
- Busiest day
- June 1, 20229 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Mercer County, 2022
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 23 | 23 | 0% | 22 | 100% | 22 min |
| Flash flood warnings | 3 | 2 | 33% | 1 | 100% | 13 min |
Each office's whole area, 2022
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Pittsburgh, PA: tornado warnings | 19 | 2 | 89% | 5 | 60% | 17 min |
| NWS Pittsburgh, PA: severe thunderstorm warnings | 224 | 170 | 24% | 543 | 85% | 21 min |
| NWS Pittsburgh, PA: flash flood warnings | 29 | 20 | 31% | 45 | 98% | 40 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 8, 3:20 AM EST | Winter Weather Advisory | PBZ | 28 hr |
| Jan 14, 4:09 AM EST | Winter Storm Watch | PBZ | 32 hr |
| Jan 15, 12:33 PM EST | Winter Storm Warning | PBZ | 54 hr |
| Jan 16, 4:24 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Jan 16, 8:38 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Jan 22, 2:43 PM EST | Winter Weather Advisory | PBZ | 28 hr |
| Jan 24, 8:33 AM EST | Winter Weather Advisory | PBZ | 22 hr |
| Jan 26, 1:17 PM EST | Wind Chill Advisory | PBZ | 19 hr |
| Jan 28, 12:26 PM EST | Wind Chill Advisory | PBZ | 45 hr |
| Feb 1, 3:09 AM EST | Winter Storm Watch | PBZ | 35 hr |
| Feb 2, 1:50 PM EST | Winter Storm Warning | PBZ | 44 hr |
| Feb 3, 5:55 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 16, 11:09 AM EST | Flood Watch | PBZ | 37 hr |
| Feb 19, 5:56 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Feb 19, 7:20 AM EST | Special Weather Statement | PBZ | 40 min |
| Feb 19, 7:41 AM EST | Snow Squall Warning | PBZ | 34 min |
| Feb 19, 8:13 AM EST | Snow Squall Warning | PBZ | 32 min |
| Feb 21, 11:25 PM EST | Flood Watch | PBZ | 18 hr |
| Feb 24, 3:58 AM EST | Winter Weather Advisory | PBZ | 30 hr |
| Feb 24, 6:24 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Mar 5, 12:49 PM EST | Wind Advisory | PBZ | 30 hr |
| Mar 7, 2:26 PM EST | Special Weather Statement | PBZ | 34 min |
| Mar 7, 2:56 PM EST | Special Weather Statement | PBZ | 49 min |
| Mar 11, 3:32 AM EST | Winter Weather Advisory | PBZ | 31 hr |
| Mar 13, 1:58 PM EDT | Special Weather Statement | PBZ | 47 min |
| Mar 29, 12:52 PM EDT | Winter Weather Advisory | PBZ | 21 hr |
| Apr 14, 8:40 AM EDT | Special Weather Statement | PBZ | 65 min |
| Apr 15, 6:30 AM EDT | Wind Advisory | PBZ | 13 hr |
| Apr 25, 3:39 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 28, 11:49 AM EDT | Freeze Warning | PBZ | 21 hr |
| May 1, 7:21 PM EDT | Special Weather Statement | PBZ | 39 min |
| May 1, 7:49 PM EDT | Severe Thunderstorm Warning | PBZ | 26 min |
| May 1, 8:14 PM EDT | Severe Thunderstorm Warning | PBZ | 46 min |
| May 16, 6:23 PM EDT | Mesoscale Discussion | SPC | 67 min |
| May 21, 2:16 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 21, 2:47 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 21, 4:30 PM EDT | Mesoscale Discussion | SPC | 90 min |
| May 21, 7:34 PM EDT | Special Weather Statement | PBZ | 26 min |
| May 21, 7:54 PM EDT | Severe Thunderstorm Warning | PBZ | 36 min |
| Jun 1, 1:00 PM EDT | Mesoscale Discussion | SPC | 90 min |
| Jun 1, 2:19 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 1, 4:47 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Jun 1, 5:35 PM EDT | Severe Thunderstorm Warning | PBZ | 40 min |
| Jun 1, 6:11 PM EDT | Severe Thunderstorm Warning | PBZ | 49 min |
| Jun 1, 6:43 PM EDT | Severe Thunderstorm Warning | PBZ | 47 min |
| Jun 1, 7:04 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Jun 1, 7:21 PM EDT | Severe Thunderstorm Warning | PBZ | 24 min |
| Jun 1, 7:39 PM EDT | Severe Thunderstorm Warning | PBZ | 36 min |
| Jun 7, 2:09 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 14, 1:17 PM EDT | Heat Advisory | PBZ | 32 hr |
| Jun 16, 1:00 PM EDT | Mesoscale Discussion | SPC | 90 min |
| Jun 16, 2:14 PM EDT | Severe Thunderstorm Watch | SPC | 11 hr |
| Jun 16, 3:18 PM EDT | Severe Thunderstorm Warning | PBZ | 42 min |
| Jun 16, 3:31 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Jun 16, 3:55 PM EDT | Severe Thunderstorm Warning | PBZ | 50 min |
| Jun 16, 3:57 PM EDT | Severe Thunderstorm Warning | PBZ | 48 min |
| Jun 16, 4:40 PM EDT | Special Weather Statement | PBZ | 35 min |
| Jun 22, 2:24 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Jun 26, 6:13 PM EDT | Special Weather Statement | PBZ | 32 min |
| Jun 26, 7:02 PM EDT | Areal Flood Advisory | PBZ | 3 hr |
| Jul 1, 8:35 PM EDT | Mesoscale Discussion | SPC | 85 min |
| Jul 20, 8:31 PM EDT | Mesoscale Discussion | SPC | 59 min |
| Jul 22, 12:50 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Jul 24, 1:00 PM EDT | Severe Thunderstorm Warning | PBZ | 45 min |
| Jul 24, 1:10 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 24, 2:30 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 24, 3:49 PM EDT | Severe Thunderstorm Warning | PBZ | 26 min |
| Jul 24, 4:10 PM EDT | Severe Thunderstorm Warning | PBZ | 50 min |
| Jul 24, 6:20 PM EDT | Special Weather Statement | PBZ | 25 min |
| Jul 24, 6:58 PM EDT | Severe Thunderstorm Warning | PBZ | 32 min |
| Jul 24, 7:07 PM EDT | Severe Thunderstorm Warning | PBZ | 38 min |
| Jul 25, 12:44 AM EDT | Severe Thunderstorm Warning | PBZ | 61 min |
| Jul 25, 1:40 AM EDT | Tornado Watch | SPC | 3 hr |
| Jul 25, 1:46 AM EDT | Severe Thunderstorm Warning | PBZ | 59 min |
| Jul 25, 1:58 AM EDT | Severe Thunderstorm Warning | PBZ | 62 min |
| Jul 25, 2:23 AM EDT | Severe Thunderstorm Warning | PBZ | 67 min |
| Aug 4, 12:58 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 4, 1:00 PM EDT | Severe Thunderstorm Warning | PBZ | 45 min |
| Aug 4, 1:51 PM EDT | Severe Thunderstorm Warning | PBZ | 24 min |
| Aug 5, 6:54 PM EDT | Flash Flood Warning | PBZ | 7 hr |
| Aug 8, 7:29 PM EDT | Mesoscale Discussion | SPC | 61 min |
| Aug 20, 5:49 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Aug 29, 1:08 PM EDT | Special Weather Statement | PBZ | 52 min |
| Sep 4, 6:37 PM EDT | Flash Flood Warning | PBZ | 2 hr |
| Sep 4, 8:39 PM EDT | Areal Flood Advisory | PBZ | 3 hr |
| Sep 4, 10:17 PM EDT | Flash Flood Warning | PBZ | 3 hr |
| Sep 5, 3:04 AM EDT | Flood Watch | PBZ | 20 hr |
| Sep 21, 1:31 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Sep 22, 12:58 AM EDT | Severe Thunderstorm Warning | PBZ | 47 min |
| Oct 2, 11:58 AM EDT | Frost Advisory | PBZ | 20 hr |
| Oct 8, 9:09 AM EDT | Frost Advisory | PBZ | 24 hr |
| Oct 15, 11:40 AM EDT | Frost Advisory | PBZ | 20 hr |
| Oct 16, 9:13 AM EDT | Freeze Watch | PBZ | 27 hr |
| Oct 19, 3:22 AM EDT | Freeze Watch | PBZ | 8 hr |
| Oct 19, 11:38 AM EDT | Freeze Warning | PBZ | 21 hr |
| Nov 2, 2:19 AM EDT | Dense Fog Advisory | PBZ | 8 hr |
| Nov 2, 10:58 PM EDT | Dense Fog Advisory | PBZ | 12 hr |
| Nov 11, 7:14 PM EST | Areal Flood Advisory | PBZ | 4 hr |
| Nov 17, 10:36 AM EST | Special Weather Statement | PBZ | 39 min |
| Nov 19, 8:25 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Nov 19, 9:45 PM EST | Special Weather Statement | PBZ | 75 min |
| Nov 30, 9:31 AM EST | Special Weather Statement | PBZ | 44 min |
| Dec 3, 10:09 AM EST | Special Weather Statement | PBZ | 51 min |
| Dec 14, 3:05 AM EST | Winter Weather Advisory | PBZ | 34 hr |
| Dec 21, 2:35 PM EST | Wind Chill Watch | PBZ | 20 hr |
| Dec 22, 3:02 AM EST | High Wind Watch | PBZ | 8 hr |
| Dec 22, 11:01 AM EST | Wind Chill Warning | PBZ | 62 hr |
| Dec 22, 11:01 AM EST | Winter Weather Advisory | PBZ | 25 hr |
| Dec 22, 11:04 AM EST | Wind Advisory | PBZ | 40 hr |
| Dec 23, 7:49 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Dec 24, 9:09 AM EST | Wind Chill Advisory | PBZ | 16 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 | 23 |
| Severe Thunderstorm Watch | 4 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 26 |
| Special Weather Statement | 15 |
| Flooding | |
| Flash Flood Warning | 3 |
| Flood Watch | 3 |
| Areal Flood Advisory | 3 |
| Winter | |
| Snow Squall Warning | 2 |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 2 |
| Winter Weather Advisory | 8 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Freeze Warning | 2 |
| Wind Chill Warning | 1 |
| Freeze Watch | 2 |
| Wind Chill Watch | 1 |
| Frost Advisory | 3 |
| Wind Chill 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 archive20212023
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.