Alert archive / Pennsylvania / Westmoreland County
Weather alerts in Westmoreland County, Pennsylvania, 2017
181 weather alerts in 2017, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Westmoreland County and its neighbors
Each county as a circle sized by its count in 2017. Tap one for its archive.
- Alerts
- 181
- Warnings
- 65
- Watches
- 14
- Advisories
- 43
- Busiest month
- June30 alerts
- Busiest day
- August 22, 201712 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Westmoreland County, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 43 | 41 | 5% | 69 | 88% | 20 min |
| Flash flood warnings | 13 | 12 | 8% | 38 | 92% | 84 min |
Each office's whole area, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Pittsburgh, PA: tornado warnings | 14 | 8 | 43% | 18 | 67% | 11 min |
| NWS Pittsburgh, PA: severe thunderstorm warnings | 225 | 186 | 17% | 518 | 88% | 21 min |
| NWS Pittsburgh, PA: flash flood warnings | 76 | 64 | 16% | 268 | 96% | 112 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 1, 9:41 PM EST | Freezing Rain Advisory | PBZ | 8 hr |
| Jan 4, 3:23 PM EST | Winter Weather Advisory | PBZ | 35 hr |
| Jan 5, 4:12 PM EST | Special Weather Statement | PBZ | 3 hr |
| Jan 6, 1:35 PM EST | Wind Chill Advisory | PBZ | 56 hr |
| Jan 9, 6:49 PM EST | Freezing Rain Advisory | PBZ | 17 hr |
| Jan 12, 2:22 PM EST | Mesoscale Discussion | SPC | 2 hr |
| Jan 12, 3:20 PM EST | Special Weather Statement | PBZ | 70 min |
| Jan 12, 5:38 PM EST | River Flood Warning | PBZ | 44 hr |
| Jan 13, 3:19 AM EST | Freezing Rain Advisory | PBZ | 43 hr |
| Jan 14, 2:37 AM EST | Winter Weather Advisory | PBZ | 16 hr |
| Jan 23, 4:28 PM EST | Areal Flood Advisory | PBZ | 8 hr |
| Jan 26, 3:12 AM EST | Winter Weather Advisory | PBZ | 51 hr |
| Jan 29, 6:54 AM EST | Special Weather Statement | PBZ | 81 min |
| Jan 30, 11:12 AM EST | Special Weather Statement | PBZ | 78 min |
| Jan 30, 1:46 PM EST | Winter Weather Advisory | PBZ | 21 hr |
| Feb 8, 3:34 AM EST | Winter Storm Warning | PBZ | 39 hr |
| Feb 8, 3:34 AM EST | Winter Weather Advisory | PBZ | 11 hr |
| Feb 8, 9:40 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 9, 5:05 PM EST | Special Weather Statement | PBZ | 55 min |
| Feb 12, 3:40 AM EST | Wind Advisory | PBZ | 31 hr |
| Feb 12, 3:40 AM EST | Winter Weather Advisory | PBZ | 28 hr |
| Feb 12, 7:02 PM EST | Severe Thunderstorm Warning | PBZ | 58 min |
| Feb 12, 7:59 PM EST | Severe Thunderstorm Warning | PBZ | 61 min |
| Feb 12, 11:43 PM EST | Special Weather Statement | PBZ | 62 min |
| Mar 1, 12:51 AM EST | Flash Flood Watch | PBZ | 12 hr |
| Mar 1, 2:19 AM EST | Mesoscale Discussion | SPC | 86 min |
| Mar 1, 6:13 AM EST | Special Weather Statement | PBZ | 32 min |
| Mar 1, 7:56 AM EST | Areal Flood Warning | PBZ | 9 hr |
| Mar 1, 8:15 AM EST | Severe Thunderstorm Warning | PBZ | 35 min |
| Mar 1, 10:17 AM EST | Severe Thunderstorm Warning | PBZ | 43 min |
| Mar 1, 11:36 AM EST | Areal Flood Advisory | PBZ | 3 hr |
| Mar 1, 12:44 PM EST | Wind Advisory | PBZ | 17 hr |
| Mar 1, 5:00 PM EST | Areal Flood Warning | PBZ | 6 hr |
| Mar 3, 12:27 PM EST | Special Weather Statement | PBZ | 63 min |
| Mar 7, 11:52 AM EST | Wind Advisory | PBZ | 39 hr |
| Mar 7, 10:25 PM EST | Special Weather Statement | PBZ | 35 min |
| Mar 9, 3:43 AM EST | Winter Weather Advisory | PBZ | 33 hr |
| Mar 10, 7:59 PM EST | Special Weather Statement | PBZ | 91 min |
| Mar 12, 4:21 AM EDT | Winter Storm Watch | PBZ | 11 hr |
| Mar 12, 3:31 PM EDT | Winter Storm Warning | PBZ | 44 hr |
| Mar 12, 3:31 PM EDT | Winter Weather Advisory | PBZ | 44 hr |
| Mar 14, 11:37 AM EDT | Winter Weather Advisory | PBZ | 47 hr |
| Mar 15, 11:16 AM EDT | Special Weather Statement | PBZ | 29 min |
| Mar 17, 6:18 PM EDT | Special Weather Statement | PBZ | 72 min |
| Mar 17, 8:23 PM EDT | Winter Weather Advisory | PBZ | 13 hr |
| Apr 6, 3:12 AM EDT | Winter Weather Advisory | PBZ | 35 hr |
| Apr 16, 2:15 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Apr 16, 5:42 PM EDT | Severe Thunderstorm Warning | PBZ | 35 min |
| Apr 20, 12:41 PM EDT | Severe Thunderstorm Warning | PBZ | 49 min |
| Apr 20, 1:29 PM EDT | Special Weather Statement | PBZ | 61 min |
| Apr 20, 2:16 PM EDT | Special Weather Statement | PBZ | 29 min |
| Apr 20, 2:28 PM EDT | Severe Thunderstorm Warning | PBZ | 47 min |
| Apr 20, 2:40 PM EDT | Mesoscale Discussion | SPC | 65 min |
| Apr 20, 3:04 PM EDT | Severe Thunderstorm Warning | PBZ | 41 min |
| Apr 27, 8:59 PM EDT | Severe Thunderstorm Warning | PBZ | 46 min |
| Apr 27, 9:15 PM EDT | Special Weather Statement | PBZ | 60 min |
| Apr 30, 2:58 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 1, 11:59 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 1, 12:32 PM EDT | Tornado Watch | SPC | 4 hr |
| May 1, 2:47 PM EDT | Severe Thunderstorm Warning | PBZ | 58 min |
| May 1, 2:54 PM EDT | Severe Thunderstorm Warning | PBZ | 66 min |
| May 1, 3:03 PM EDT | Areal Flood Advisory | PBZ | 3 hr |
| May 1, 3:34 PM EDT | Severe Thunderstorm Warning | PBZ | 56 min |
| May 2, 4:37 AM EDT | Wind Advisory | PBZ | 14 hr |
| May 5, 4:07 PM EDT | Mesoscale Discussion | SPC | 113 min |
| May 5, 5:30 PM EDT | Flash Flood Warning | PBZ | 2 hr |
| May 5, 7:53 PM EDT | Severe Thunderstorm Warning | PBZ | 38 min |
| May 7, 1:59 PM EDT | Frost Advisory | PBZ | 19 hr |
| May 8, 3:20 AM EDT | Frost Advisory | PBZ | 30 hr |
| May 18, 4:35 PM EDT | Mesoscale Discussion | SPC | 85 min |
| May 19, 5:12 PM EDT | Severe Thunderstorm Warning | PBZ | 48 min |
| May 28, 11:11 AM EDT | Flash Flood Watch | PBZ | 8 hr |
| May 30, 12:03 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 30, 12:39 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 30, 1:27 PM EDT | Severe Thunderstorm Warning | PBZ | 25 min |
| May 30, 2:33 PM EDT | Special Weather Statement | PBZ | 42 min |
| May 31, 4:06 PM EDT | Severe Thunderstorm Warning | PBZ | 39 min |
| May 31, 4:47 PM EDT | Special Weather Statement | PBZ | 43 min |
| Jun 5, 3:00 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 5, 3:14 PM EDT | Special Weather Statement | PBZ | 31 min |
| Jun 13, 3:54 PM EDT | Severe Thunderstorm Warning | PBZ | 51 min |
| Jun 13, 4:21 PM EDT | Flash Flood Warning | PBZ | 3 hr |
| Jun 13, 4:42 PM EDT | Severe Thunderstorm Warning | PBZ | 48 min |
| Jun 13, 4:45 PM EDT | Severe Thunderstorm Warning | PBZ | 45 min |
| Jun 13, 4:54 PM EDT | Flash Flood Warning | PBZ | 3 hr |
| Jun 13, 5:29 PM EDT | Severe Thunderstorm Warning | PBZ | 18 min |
| Jun 14, 2:20 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 14, 4:30 PM EDT | Flash Flood Warning | PBZ | 3 hr |
| Jun 15, 3:45 PM EDT | Severe Thunderstorm Warning | PBZ | 30 min |
| Jun 15, 3:45 PM EDT | Severe Thunderstorm Warning | PBZ | 45 min |
| Jun 15, 4:01 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Jun 15, 9:20 PM EDT | Special Weather Statement | PBZ | 55 min |
| Jun 15, 10:19 PM EDT | Areal Flood Advisory | PBZ | 4 hr |
| Jun 16, 2:51 PM EDT | Severe Thunderstorm Warning | PBZ | 39 min |
| Jun 16, 3:17 PM EDT | Severe Thunderstorm Warning | PBZ | 28 min |
| Jun 16, 3:34 PM EDT | Flash Flood Warning | PBZ | 3 hr |
| Jun 18, 12:31 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Jun 18, 1:37 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 19, 8:17 PM EDT | Special Weather Statement | PBZ | 58 min |
| Jun 21, 2:38 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 21, 2:45 PM EDT | Special Weather Statement | PBZ | 30 min |
| Jun 22, 12:26 PM EDT | Flash Flood Watch | PBZ | 38 hr |
| Jun 23, 2:20 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 23, 3:09 PM EDT | Severe Thunderstorm Warning | PBZ | 36 min |
| Jun 23, 3:47 PM EDT | Severe Thunderstorm Warning | PBZ | 43 min |
| Jun 23, 4:30 PM EDT | Severe Thunderstorm Warning | PBZ | 30 min |
| Jun 23, 4:38 PM EDT | Flash Flood Warning | PBZ | 8 hr |
| Jun 24, 12:22 AM EDT | Areal Flood Warning | PBZ | 9 hr |
| Jul 3, 5:43 PM EDT | Special Weather Statement | PBZ | 47 min |
| Jul 10, 3:08 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 13, 9:25 AM EDT | Flash Flood Watch | PBZ | 31 hr |
| Jul 14, 10:09 PM EDT | Areal Flood Advisory | PBZ | 2 hr |
| Jul 20, 3:50 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 20, 5:50 PM EDT | Special Weather Statement | PBZ | 25 min |
| Jul 22, 8:34 AM EDT | Mesoscale Discussion | SPC | 86 min |
| Jul 23, 8:28 PM EDT | Areal Flood Advisory | PBZ | 3 hr |
| Jul 23, 9:12 PM EDT | Flash Flood Warning | PBZ | 3 hr |
| Jul 23, 9:28 PM EDT | Flash Flood Warning | PBZ | 3 hr |
| Jul 23, 9:41 PM EDT | Areal Flood Advisory | PBZ | 3 hr |
| Jul 24, 2:17 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Jul 27, 2:13 PM EDT | Flash Flood Watch | PBZ | 42 hr |
| Jul 28, 1:42 PM EDT | Flash Flood Warning | PBZ | 3 hr |
| Jul 28, 2:29 PM EDT | Flash Flood Warning | PBZ | 4 hr |
| Jul 28, 8:30 PM EDT | Areal Flood Advisory | PBZ | 4 hr |
| Jul 28, 8:36 PM EDT | Areal Flood Advisory | PBZ | 3 hr |
| Jul 28, 8:45 PM EDT | Flash Flood Warning | PBZ | 9 hr |
| Jul 28, 11:14 PM EDT | Flash Flood Warning | PBZ | 9 hr |
| Jul 28, 11:51 PM EDT | Flash Flood Warning | PBZ | 8 hr |
| Jul 29, 7:40 AM EDT | Areal Flood Warning | PBZ | 6 hr |
| Jul 29, 11:33 AM EDT | River Flood Warning | PBZ | 34 hr |
| Jul 29, 11:33 AM EDT | River Flood Warning | PBZ | 34 hr |
| Aug 4, 11:38 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 4, 1:25 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 4, 2:46 PM EDT | Special Weather Statement | PBZ | 29 min |
| Aug 4, 2:56 PM EDT | Severe Thunderstorm Warning | PBZ | 34 min |
| Aug 4, 3:46 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Aug 4, 7:41 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 19, 2:13 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 19, 2:45 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 19, 3:54 PM EDT | Severe Thunderstorm Warning | PBZ | 51 min |
| Aug 19, 4:32 PM EDT | Severe Thunderstorm Warning | PBZ | 43 min |
| Aug 19, 4:43 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 19, 4:46 PM EDT | Severe Thunderstorm Warning | PBZ | 44 min |
| Aug 19, 5:04 PM EDT | Severe Thunderstorm Warning | PBZ | 28 min |
| Aug 19, 5:07 PM EDT | Severe Thunderstorm Warning | PBZ | 53 min |
| Aug 19, 5:16 PM EDT | Severe Thunderstorm Warning | PBZ | 44 min |
| Aug 19, 5:34 PM EDT | Severe Thunderstorm Warning | PBZ | 24 min |
| Aug 20, 3:26 AM EDT | Dense Fog Advisory | PBZ | 6 hr |
| Aug 22, 11:54 AM EDT | Mesoscale Discussion | SPC | 66 min |
| Aug 22, 12:39 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 22, 1:57 PM EDT | Severe Thunderstorm Warning | PBZ | 48 min |
| Aug 22, 2:36 PM EDT | Severe Thunderstorm Warning | PBZ | 39 min |
| Aug 22, 2:44 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Aug 22, 2:54 PM EDT | Severe Thunderstorm Warning | PBZ | 36 min |
| Aug 22, 3:24 PM EDT | Severe Thunderstorm Warning | PBZ | 36 min |
| Aug 22, 3:40 PM EDT | Areal Flood Advisory | PBZ | 3 hr |
| Aug 22, 3:54 PM EDT | Severe Thunderstorm Warning | PBZ | 36 min |
| Aug 22, 4:26 PM EDT | Severe Thunderstorm Warning | PBZ | 49 min |
| Aug 22, 4:39 PM EDT | Mesoscale Discussion | SPC | 66 min |
| Aug 22, 5:05 PM EDT | Severe Thunderstorm Warning | PBZ | 25 min |
| Sep 14, 9:08 PM EDT | Dense Fog Advisory | PBZ | 13 hr |
| Sep 15, 9:30 PM EDT | Dense Fog Advisory | PBZ | 12 hr |
| Oct 16, 11:21 AM EDT | Frost Advisory | PBZ | 23 hr |
| Oct 29, 3:25 AM EDT | Wind Advisory | PBZ | 26 hr |
| Nov 5, 7:06 PM EST | Mesoscale Discussion | SPC | 84 min |
| Nov 5, 7:57 PM EST | Severe Thunderstorm Warning | PBZ | 34 min |
| Nov 6, 5:04 AM EST | Areal Flood Advisory | PBZ | 3 hr |
| Nov 18, 3:55 AM EST | Wind Advisory | PBZ | 29 hr |
| Nov 18, 9:57 AM EST | Flood Watch | PBZ | 16 hr |
| Nov 19, 12:19 AM EST | Special Weather Statement | PBZ | 56 min |
| Dec 11, 12:05 PM EST | Winter Weather Advisory | PBZ | 39 hr |
| Dec 12, 7:29 AM EST | Special Weather Statement | PBZ | 61 min |
| Dec 12, 4:15 PM EST | Special Weather Statement | PBZ | 30 min |
| Dec 12, 5:01 PM EST | Special Weather Statement | PBZ | 59 min |
| Dec 12, 6:14 PM EST | Special Weather Statement | PBZ | 61 min |
| Dec 13, 2:59 AM EST | Winter Weather Advisory | PBZ | 31 hr |
| Dec 23, 2:04 PM EST | Winter Weather Advisory | PBZ | 46 hr |
| Dec 25, 1:16 AM EST | Special Weather Statement | PBZ | 59 min |
| Dec 25, 3:40 AM EST | Special Weather Statement | PBZ | 65 min |
| Dec 29, 3:53 PM EST | Winter Weather Advisory | PBZ | 29 hr |
| Dec 30, 7:56 PM EST | Wind Chill Advisory | PBZ | 4 days |
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 | 43 |
| Severe Thunderstorm Watch | 6 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 28 |
| Special Weather Statement | 31 |
| Flooding | |
| Areal Flood Warning | 4 |
| Flash Flood Warning | 13 |
| River Flood Warning | 3 |
| Flash Flood Watch | 5 |
| Flood Watch | 1 |
| Areal Flood Advisory | 11 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 1 |
| Freezing Rain Advisory | 3 |
| Winter Weather Advisory | 15 |
| Cold | |
| Frost Advisory | 3 |
| Wind Chill Advisory | 2 |
| Wind and dust | |
| Wind Advisory | 6 |
| Fog and smoke | |
| Dense Fog Advisory | 3 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20162018
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.