Alert archive / Pennsylvania / Washington County
Weather alerts in Washington County, Pennsylvania, 2023
96 weather alerts in 2023, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Washington County and its neighbors
Each county as a circle sized by its count in 2023. Tap one for its archive.
- Alerts
- 96
- Warnings
- 35
- Watches
- 16
- Advisories
- 13
- Busiest month
- August22 alerts
- Busiest day
- August 12, 20238 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
2 of 3 tornado warnings covering Washington County in 2023 had a tornado report inside them; 4 of 4 tornado reports fell inside a warning, on average 15 minutes after it went out.
Washington County, 2023
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 3 | 2 | 33% | 4 | 100% | 15 min |
| Severe thunderstorm warnings | 23 | 18 | 22% | 47 | 74% | 19 min |
| Flash flood warnings | 4 | 1 | 75% | 0 |
Each office's whole area, 2023
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Pittsburgh, PA: tornado warnings | 15 | 2 | 87% | 7 | 57% | 15 min |
| NWS Pittsburgh, PA: severe thunderstorm warnings | 133 | 98 | 26% | 502 | 76% | 21 min |
| NWS Pittsburgh, PA: flash flood warnings | 32 | 19 | 41% | 63 | 71% | 49 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 3, 9:36 AM EST | Special Weather Statement | PBZ | 24 min |
| Jan 3, 10:50 AM EST | Areal Flood Advisory | PBZ | 38 min |
| Jan 3, 11:28 AM EST | Areal Flood Warning | PBZ | 6 hr |
| Jan 19, 6:57 PM EST | Special Weather Statement | PBZ | 48 min |
| Jan 19, 7:38 PM EST | Special Weather Statement | PBZ | 37 min |
| Jan 19, 8:13 PM EST | Special Weather Statement | PBZ | 47 min |
| Jan 27, 6:41 AM EST | Special Weather Statement | PBZ | 34 min |
| Feb 8, 11:21 AM EST | Wind Advisory | PBZ | 43 hr |
| Feb 17, 3:49 AM EST | Special Weather Statement | PBZ | 56 min |
| Mar 2, 1:13 PM EST | Wind Advisory | PBZ | 48 hr |
| Mar 13, 3:48 PM EDT | Special Weather Statement | PBZ | 42 min |
| Mar 14, 12:25 AM EDT | Special Weather Statement | PBZ | 50 min |
| Mar 18, 1:56 PM EDT | Special Weather Statement | PBZ | 49 min |
| Mar 24, 12:25 AM EDT | Areal Flood Advisory | PBZ | 3 hr |
| Mar 24, 1:26 PM EDT | Wind Advisory | PBZ | 34 hr |
| Mar 25, 11:50 AM EDT | Mesoscale Discussion | SPC | 85 min |
| Mar 25, 1:01 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Mar 25, 2:07 PM EDT | Mesoscale Discussion | SPC | 53 min |
| Mar 30, 1:45 PM EDT | High Wind Watch | PBZ | 24 hr |
| Mar 31, 1:32 PM EDT | High Wind Warning | PBZ | 36 hr |
| Apr 1, 11:15 AM EDT | Mesoscale Discussion | SPC | 3 hr |
| Apr 1, 11:59 AM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Apr 1, 2:22 PM EDT | Severe Thunderstorm Warning | PBZ | 23 min |
| Apr 1, 2:45 PM EDT | Severe Thunderstorm Warning | PBZ | 45 min |
| Apr 5, 2:02 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Apr 5, 6:46 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Apr 5, 6:54 PM EDT | Severe Thunderstorm Warning | PBZ | 66 min |
| Apr 5, 6:57 PM EDT | Severe Thunderstorm Warning | PBZ | 63 min |
| Apr 5, 7:43 PM EDT | Severe Thunderstorm Warning | PBZ | 32 min |
| Apr 5, 7:59 PM EDT | Severe Thunderstorm Warning | PBZ | 46 min |
| Apr 11, 4:04 PM EDT | Fire Weather Watch | PBZ | 18 hr |
| Apr 12, 9:38 AM EDT | Red Flag Warning | PBZ | 10 hr |
| Apr 18, 11:39 AM EDT | Frost Advisory | PBZ | 21 hr |
| Apr 24, 2:48 AM EDT | Freeze Watch | PBZ | 9 hr |
| Apr 24, 11:22 AM EDT | Freeze Warning | PBZ | 22 hr |
| Apr 25, 8:00 PM EDT | Freeze Watch | PBZ | 17 hr |
| Apr 26, 12:59 PM EDT | Frost Advisory | PBZ | 20 hr |
| Jun 3, 1:27 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 3, 4:59 PM EDT | Special Weather Statement | PBZ | 31 min |
| Jun 3, 5:14 PM EDT | Severe Thunderstorm Warning | PBZ | 31 min |
| Jun 3, 5:44 PM EDT | Severe Thunderstorm Warning | PBZ | 31 min |
| Jun 26, 6:28 PM EDT | Special Weather Statement | PBZ | 32 min |
| Jun 26, 6:32 PM EDT | Severe Thunderstorm Warning | PBZ | 28 min |
| Jul 2, 7:56 PM EDT | Severe Thunderstorm Warning | PBZ | 34 min |
| Jul 2, 8:10 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Jul 2, 8:41 PM EDT | Flash Flood Warning | PBZ | 3 hr |
| Jul 6, 6:19 PM EDT | Severe Thunderstorm Warning | PBZ | 26 min |
| Jul 6, 6:49 PM EDT | Severe Thunderstorm Warning | PBZ | 26 min |
| Jul 13, 7:34 PM EDT | Severe Thunderstorm Warning | PBZ | 26 min |
| Jul 13, 7:58 PM EDT | Severe Thunderstorm Warning | PBZ | 32 min |
| Jul 13, 8:21 PM EDT | Severe Thunderstorm Warning | PBZ | 24 min |
| Jul 13, 8:39 PM EDT | Severe Thunderstorm Warning | PBZ | 21 min |
| Jul 17, 1:53 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 20, 4:56 PM EDT | Mesoscale Discussion | SPC | 94 min |
| Jul 20, 6:19 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jul 20, 10:03 PM EDT | Special Weather Statement | PBZ | 27 min |
| Jul 20, 10:29 PM EDT | Flash Flood Warning | PBZ | 3 hr |
| Jul 20, 11:02 PM EDT | Flash Flood Warning | PBZ | 3 hr |
| Jul 27, 3:05 AM EDT | Heat Advisory | PBZ | 38 hr |
| Jul 28, 2:18 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 28, 4:12 PM EDT | Mesoscale Discussion | SPC | 93 min |
| Jul 29, 2:52 AM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 29, 6:06 AM EDT | Mesoscale Discussion | SPC | 114 min |
| Aug 7, 10:57 AM EDT | Tornado Watch | SPC | 7 hr |
| Aug 12, 12:50 PM EDT | Tornado Watch | SPC | 8 hr |
| Aug 12, 1:36 PM EDT | Flood Watch | PBZ | 8 hr |
| Aug 12, 4:04 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Aug 12, 6:24 PM EDT | Severe Thunderstorm Warning | PBZ | 51 min |
| Aug 12, 6:54 PM EDT | Severe Thunderstorm Warning | PBZ | 51 min |
| Aug 12, 7:12 PM EDT | Special Weather Statement | PBZ | 48 min |
| Aug 12, 7:31 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Aug 12, 7:36 PM EDT | Severe Thunderstorm Warning | PBZ | 39 min |
| Aug 12, 8:03 PM EDT | Tornado Warning | PBZ | 27 min |
| Aug 12, 8:06 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Aug 12, 8:24 PM EDT | Tornado Warning | PBZ | 36 min |
| Aug 12, 8:52 PM EDT | Severe Thunderstorm Warning | PBZ | 38 min |
| Aug 12, 9:08 PM EDT | Flash Flood Warning | PBZ | 63 min |
| Aug 12, 9:08 PM EDT | Tornado Warning | PBZ | 22 min |
| Aug 12, 9:28 PM EDT | Severe Thunderstorm Warning | PBZ | 33 min |
| Aug 14, 7:02 PM EDT | Areal Flood Advisory | PBZ | 96 min |
| Aug 25, 12:35 AM EDT | Special Weather Statement | PBZ | 25 min |
| Aug 25, 12:52 AM EDT | Severe Thunderstorm Warning | PBZ | 53 min |
| Aug 25, 1:38 AM EDT | Severe Thunderstorm Warning | PBZ | 52 min |
| Aug 25, 2:02 AM EDT | Mesoscale Discussion | SPC | 118 min |
| Aug 25, 2:20 AM EDT | Areal Flood Advisory | PBZ | 3 hr |
| Sep 30, 2:41 AM EDT | Dense Fog Advisory | PBZ | 7 hr |
| Oct 1, 2:56 AM EDT | Dense Fog Advisory | PBZ | 7 hr |
| Oct 21, 2:03 PM EDT | Freeze Watch | PBZ | 23 hr |
| Oct 22, 1:17 PM EDT | Frost Advisory | PBZ | 20 hr |
| Oct 29, 2:48 PM EDT | Freeze Watch | PBZ | 12 hr |
| Oct 30, 2:47 AM EDT | Freeze Warning | PBZ | 31 hr |
| Nov 28, 2:20 PM EST | Special Weather Statement | PBZ | 25 min |
| Nov 28, 2:47 PM EST | Special Weather Statement | PBZ | 28 min |
| Nov 28, 4:30 PM EST | Special Weather Statement | PBZ | 15 min |
| Dec 3, 5:21 PM EST | Special Weather Statement | PBZ | 24 min |
| Dec 19, 6:36 AM EST | Special Weather Statement | PBZ | 39 min |
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 |
| Tornado Warning | 3 |
| Severe Thunderstorm Watch | 7 |
| Tornado Watch | 2 |
| Mesoscale Discussion | 13 |
| Special Weather Statement | 19 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flash Flood Warning | 4 |
| Flood Watch | 1 |
| Areal Flood Advisory | 4 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Freeze Warning | 2 |
| Freeze Watch | 4 |
| Frost Advisory | 3 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 1 |
| Wind Advisory | 3 |
| Fire | |
| Red Flag Warning | 1 |
| Fire Weather Watch | 1 |
| 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 archive20222024
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.