Alert archive / Pennsylvania / Fayette County
Weather alerts in Fayette County, Pennsylvania, 2020
123 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Fayette County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 123
- Warnings
- 47
- Watches
- 15
- Advisories
- 28
- Busiest month
- August24 alerts
- Busiest day
- August 25, 202012 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 1 tornado warnings covering Fayette County in 2020 had a tornado report inside them.
Fayette County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 30 | 22 | 27% | 13 | 85% | 19 min |
| Flash flood warnings | 3 | 3 | 0% | 1 | 100% | 63 min |
Each office's whole area, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Pittsburgh, PA: tornado warnings | 10 | 3 | 70% | 8 | 38% | 4 min |
| NWS Pittsburgh, PA: severe thunderstorm warnings | 213 | 143 | 33% | 555 | 83% | 19 min |
| NWS Pittsburgh, PA: flash flood warnings | 24 | 19 | 21% | 49 | 90% | 83 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 11, 3:15 AM EST | High Wind Watch | PBZ | 10 hr |
| Jan 11, 3:15 AM EST | Wind Advisory | PBZ | 31 hr |
| Jan 11, 5:41 PM EST | Special Weather Statement | PBZ | 79 min |
| Jan 17, 2:02 PM EST | Winter Weather Advisory | PBZ | 28 hr |
| Jan 24, 2:56 AM EST | Wind Advisory | PBZ | 16 hr |
| Feb 5, 3:44 AM EST | Winter Weather Advisory | PBZ | 27 hr |
| Feb 6, 2:58 PM EST | Winter Weather Advisory | PBZ | 28 hr |
| Feb 7, 5:32 AM EST | Mesoscale Discussion | SPC | 3 hr |
| Feb 7, 4:46 PM EST | Special Weather Statement | PBZ | 59 min |
| Feb 11, 12:59 PM EST | Flash Flood Watch | PBZ | 42 hr |
| Feb 26, 3:20 AM EST | Winter Weather Advisory | PBZ | 33 hr |
| Feb 28, 2:06 AM EST | Winter Weather Advisory | PBZ | 8 hr |
| Mar 3, 1:22 PM EST | Mesoscale Discussion | SPC | 113 min |
| Mar 3, 4:27 PM EST | Mesoscale Discussion | SPC | 2 hr |
| Mar 3, 8:52 PM EST | Special Weather Statement | PBZ | 23 min |
| Mar 3, 9:20 PM EST | Special Weather Statement | PBZ | 25 min |
| Mar 14, 2:12 PM EDT | Winter Weather Advisory | PBZ | 21 hr |
| Mar 20, 12:21 PM EDT | Special Weather Statement | PBZ | 54 min |
| Mar 20, 4:32 PM EDT | Severe Thunderstorm Warning | PBZ | 28 min |
| Mar 28, 1:42 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Mar 28, 4:10 PM EDT | Flash Flood Warning | PBZ | 9 hr |
| Mar 28, 4:54 PM EDT | Severe Thunderstorm Warning | PBZ | 51 min |
| Mar 28, 5:04 PM EDT | Severe Thunderstorm Warning | PBZ | 41 min |
| Mar 28, 5:23 PM EDT | Flash Flood Warning | PBZ | 3 hr |
| Mar 28, 5:38 PM EDT | Severe Thunderstorm Warning | PBZ | 37 min |
| Mar 29, 12:32 AM EDT | Areal Flood Warning | PBZ | 8 hr |
| Mar 29, 1:58 PM EDT | Wind Advisory | PBZ | 7 hr |
| Apr 7, 11:40 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Apr 8, 1:39 AM EDT | Severe Thunderstorm Warning | PBZ | 51 min |
| Apr 8, 1:52 AM EDT | Mesoscale Discussion | SPC | 83 min |
| Apr 8, 2:06 AM EDT | Special Weather Statement | PBZ | 24 min |
| Apr 11, 2:03 PM EDT | High Wind Watch | PBZ | 24 hr |
| Apr 12, 1:44 PM EDT | High Wind Warning | PBZ | 30 hr |
| Apr 12, 1:44 PM EDT | Wind Advisory | PBZ | 28 hr |
| Apr 13, 11:18 AM EDT | Severe Thunderstorm Warning | PBZ | 27 min |
| Apr 21, 3:44 AM EDT | Freeze Warning | PBZ | 30 hr |
| May 6, 1:01 PM EDT | Freeze Warning | PBZ | 20 hr |
| May 7, 1:13 PM EDT | Freeze Warning | PBZ | 45 hr |
| May 9, 3:17 AM EDT | Freeze Warning | PBZ | 28 hr |
| May 10, 8:19 PM EDT | Special Weather Statement | PBZ | 56 min |
| May 11, 2:53 AM EDT | Freeze Warning | PBZ | 29 hr |
| May 12, 11:46 AM EDT | Frost Advisory | PBZ | 21 hr |
| May 12, 11:46 AM EDT | Freeze Warning | PBZ | 21 hr |
| May 19, 3:20 AM EDT | Wind Advisory | PBZ | 29 hr |
| May 23, 3:51 AM EDT | Dense Fog Advisory | PBZ | 5 hr |
| May 29, 4:54 PM EDT | Special Weather Statement | PBZ | 36 min |
| May 29, 5:24 PM EDT | Special Weather Statement | PBZ | 36 min |
| May 29, 8:37 PM EDT | Areal Flood Advisory | PBZ | 113 min |
| Jun 3, 3:10 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 4, 12:45 PM EDT | Mesoscale Discussion | SPC | 90 min |
| Jun 4, 12:55 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 4, 4:43 PM EDT | Severe Thunderstorm Warning | PBZ | 77 min |
| Jun 10, 6:32 PM EDT | Severe Thunderstorm Warning | PBZ | 31 min |
| Jun 10, 6:51 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 10, 11:24 PM EDT | Special Weather Statement | PBZ | 51 min |
| Jun 22, 1:58 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 7, 6:04 PM EDT | Special Weather Statement | PBZ | 26 min |
| Jul 7, 6:20 PM EDT | Areal Flood Advisory | PBZ | 3 hr |
| Jul 7, 7:25 PM EDT | Areal Flood Advisory | PBZ | 2 hr |
| Jul 8, 3:41 PM EDT | Heat Advisory | PBZ | 28 hr |
| Jul 10, 5:27 PM EDT | Severe Thunderstorm Warning | PBZ | 33 min |
| Jul 10, 5:33 PM EDT | Severe Thunderstorm Warning | PBZ | 29 min |
| Jul 10, 5:42 PM EDT | Flash Flood Warning | PBZ | 2 hr |
| Jul 10, 6:12 PM EDT | Severe Thunderstorm Warning | PBZ | 33 min |
| Jul 10, 6:30 PM EDT | Severe Thunderstorm Warning | PBZ | 45 min |
| Jul 10, 6:56 PM EDT | Areal Flood Advisory | PBZ | 18 min |
| Jul 10, 7:13 PM EDT | Areal Flood Warning | PBZ | 107 min |
| Jul 16, 12:18 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Jul 16, 1:20 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 16, 3:51 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Jul 16, 7:57 PM EDT | Special Weather Statement | CTP | 18 min |
| Jul 18, 1:26 PM EDT | Heat Advisory | PBZ | 28 hr |
| Jul 21, 12:14 PM EDT | Special Weather Statement | PBZ | 46 min |
| Jul 22, 10:48 AM EDT | Mesoscale Discussion | SPC | 117 min |
| Jul 27, 8:58 PM EDT | Severe Thunderstorm Warning | PBZ | 32 min |
| Aug 1, 3:57 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 1, 4:33 PM EDT | Special Weather Statement | PBZ | 42 min |
| Aug 24, 1:25 PM EDT | Special Weather Statement | PBZ | 35 min |
| Aug 25, 8:18 AM EDT | Severe Thunderstorm Warning | PBZ | 27 min |
| Aug 25, 9:05 AM EDT | Severe Thunderstorm Warning | PBZ | 25 min |
| Aug 25, 1:21 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 25, 2:26 PM EDT | Severe Thunderstorm Warning | PBZ | 23 min |
| Aug 25, 3:15 PM EDT | Severe Thunderstorm Warning | PBZ | 45 min |
| Aug 25, 3:39 PM EDT | Severe Thunderstorm Warning | PBZ | 51 min |
| Aug 25, 4:20 PM EDT | Severe Thunderstorm Warning | PBZ | 40 min |
| Aug 25, 4:35 PM EDT | Mesoscale Discussion | SPC | 85 min |
| Aug 25, 4:40 PM EDT | Special Weather Statement | PBZ | 50 min |
| Aug 25, 5:01 PM EDT | Severe Thunderstorm Warning | PBZ | 29 min |
| Aug 25, 5:05 PM EDT | Severe Thunderstorm Warning | PBZ | 25 min |
| Aug 25, 5:34 PM EDT | Special Weather Statement | PBZ | 26 min |
| Aug 27, 2:14 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 27, 5:32 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Aug 27, 6:35 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Aug 27, 6:41 PM EDT | Severe Thunderstorm Warning | PBZ | 64 min |
| Aug 27, 7:40 PM EDT | Severe Thunderstorm Warning | PBZ | 65 min |
| Aug 27, 8:42 PM EDT | Severe Thunderstorm Warning | PBZ | 48 min |
| Aug 28, 3:03 PM EDT | Severe Thunderstorm Warning | PBZ | 42 min |
| Aug 28, 3:26 PM EDT | Special Weather Statement | PBZ | 34 min |
| Aug 28, 3:28 PM EDT | Tornado Warning | PBZ | 32 min |
| Sep 3, 12:20 PM EDT | Special Weather Statement | PBZ | 25 min |
| Sep 19, 1:17 PM EDT | Frost Advisory | PBZ | 20 hr |
| Sep 21, 3:35 PM EDT | Frost Advisory | PBZ | 17 hr |
| Oct 2, 1:10 PM EDT | Frost Advisory | PBZ | 20 hr |
| Oct 15, 5:04 PM EDT | Freeze Watch | PBZ | 21 hr |
| Oct 16, 1:34 PM EDT | Frost Advisory | PBZ | 19 hr |
| Oct 16, 1:34 PM EDT | Freeze Warning | PBZ | 19 hr |
| Nov 1, 4:00 AM EST | Winter Weather Advisory | PBZ | 27 hr |
| Nov 14, 1:10 PM EST | Wind Advisory | PBZ | 42 hr |
| Nov 15, 2:36 PM EST | Severe Thunderstorm Warning | PBZ | 39 min |
| Nov 15, 3:02 PM EST | Severe Thunderstorm Warning | PBZ | 43 min |
| Nov 15, 3:16 PM EST | Severe Thunderstorm Warning | PBZ | 44 min |
| Nov 15, 3:33 PM EST | Severe Thunderstorm Warning | PBZ | 27 min |
| Nov 15, 3:46 PM EST | Severe Thunderstorm Warning | PBZ | 44 min |
| Nov 29, 7:35 PM EST | Winter Weather Advisory | PBZ | 56 hr |
| Nov 30, 3:18 AM EST | Winter Storm Warning | PBZ | 48 hr |
| Dec 14, 4:35 AM EST | Winter Storm Watch | PBZ | 23 hr |
| Dec 15, 3:46 AM EST | Winter Storm Watch | PBZ | 9 hr |
| Dec 15, 3:46 AM EST | Winter Storm Warning | PBZ | 49 hr |
| Dec 16, 5:41 PM EST | Special Weather Statement | PBZ | 2 hr |
| Dec 21, 3:25 AM EST | Winter Weather Advisory | PBZ | 30 hr |
| Dec 23, 4:01 AM EST | Winter Storm Watch | PBZ | 24 hr |
| Dec 23, 12:39 PM EST | Winter Weather Advisory | PBZ | 48 hr |
| Dec 24, 3:48 AM EST | Winter Storm Warning | PBZ | 33 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 | 1 |
| Severe Thunderstorm Watch | 8 |
| Mesoscale Discussion | 13 |
| Special Weather Statement | 20 |
| Flooding | |
| Areal Flood Warning | 2 |
| Flash Flood Warning | 3 |
| Flash Flood Watch | 1 |
| Areal Flood Advisory | 4 |
| Winter | |
| Winter Storm Warning | 3 |
| Winter Storm Watch | 3 |
| Winter Weather Advisory | 10 |
| Heat | |
| Heat Advisory | 2 |
| Cold | |
| Freeze Warning | 7 |
| Freeze Watch | 1 |
| Frost Advisory | 5 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 2 |
| Wind Advisory | 6 |
| Fog and smoke | |
| Dense Fog Advisory | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20192021
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.