Alert archive / Pennsylvania / Allegheny County
Weather alerts in Allegheny County, Pennsylvania, 2016
146 weather alerts in 2016, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Allegheny County and its neighbors
Each county as a circle sized by its count in 2016. Tap one for its archive.
- Alerts
- 146
- Warnings
- 41
- Watches
- 9
- Advisories
- 42
- Busiest month
- July31 alerts
- Busiest day
- June 16, 201610 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Allegheny County, 2016
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 21 | 14 | 33% | 41 | 80% | 15 min |
| Flash flood warnings | 6 | 6 | 0% | 21 | 95% | 41 min |
Each office's whole area, 2016
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Pittsburgh, PA: tornado warnings | 13 | 4 | 69% | 6 | 67% | 3 min |
| NWS Pittsburgh, PA: severe thunderstorm warnings | 155 | 113 | 27% | 345 | 81% | 20 min |
| NWS Pittsburgh, PA: flash flood warnings | 24 | 16 | 33% | 60 | 85% | 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 |
|---|---|---|---|
| Dec 31, 8:12 PM EST | Winter Weather Advisory | PBZ | 5 hr |
| Jan 4, 7:13 AM EST | Special Weather Statement | PBZ | 92 min |
| Jan 9, 6:48 AM EST | Special Weather Statement | PBZ | 117 min |
| Jan 10, 3:31 AM EST | Wind Advisory | PBZ | 14 hr |
| Jan 11, 2:37 PM EST | Winter Weather Advisory | PBZ | 40 hr |
| Jan 12, 10:24 AM EST | Special Weather Statement | PBZ | 66 min |
| Jan 12, 11:29 AM EST | Special Weather Statement | PBZ | 91 min |
| Jan 17, 4:04 AM EST | Wind Chill Advisory | PBZ | 57 hr |
| Jan 17, 5:14 PM EST | Special Weather Statement | PBZ | 61 min |
| Jan 20, 4:37 PM EST | Special Weather Statement | PBZ | 83 min |
| Jan 21, 3:16 AM EST | Winter Storm Warning | PBZ | 64 hr |
| Jan 21, 3:16 AM EST | Winter Weather Advisory | PBZ | 58 hr |
| Jan 29, 6:18 AM EST | Special Weather Statement | PBZ | 72 min |
| Feb 7, 8:26 PM EST | Winter Weather Advisory | PBZ | 4 days |
| Feb 10, 2:30 AM EST | Winter Weather Advisory | PBZ | 24 hr |
| Feb 12, 3:29 AM EST | Wind Chill Advisory | PBZ | 54 hr |
| Feb 12, 9:33 PM EST | Special Weather Statement | PBZ | 57 min |
| Feb 14, 3:45 PM EST | Winter Weather Advisory | PBZ | 45 hr |
| Feb 17, 4:40 PM EST | Special Weather Statement | PBZ | 50 min |
| Feb 17, 5:54 PM EST | Special Weather Statement | PBZ | 51 min |
| Feb 24, 12:33 PM EST | Special Weather Statement | PBZ | 3 hr |
| Feb 25, 11:31 AM EST | River Flood Advisory | PBZ | 36 hr |
| Feb 29, 2:12 AM EST | Wind Advisory | PBZ | 7 hr |
| Mar 1, 3:34 AM EST | Wind Advisory | PBZ | 27 hr |
| Mar 17, 10:31 AM EDT | Red Flag Warning | PBZ | 9 hr |
| Apr 2, 2:07 AM EDT | Wind Advisory | PBZ | 26 hr |
| Apr 2, 10:43 PM EDT | Special Weather Statement | PBZ | 47 min |
| Apr 5, 5:39 AM EDT | Special Weather Statement | PBZ | 51 min |
| Apr 5, 6:27 AM EDT | Special Weather Statement | PBZ | 63 min |
| Apr 8, 3:33 AM EDT | Winter Weather Advisory | PBZ | 39 hr |
| Apr 23, 2:07 PM EDT | Frost Advisory | PBZ | 18 hr |
| Apr 26, 5:23 AM EDT | Special Weather Statement | PBZ | 52 min |
| Apr 26, 1:54 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 2, 3:58 AM EDT | Severe Thunderstorm Warning | PBZ | 32 min |
| May 5, 3:18 PM EDT | Special Weather Statement | PBZ | 27 min |
| May 15, 2:22 AM EDT | Freeze Watch | PBZ | 12 hr |
| May 15, 2:18 PM EDT | Freeze Warning | PBZ | 18 hr |
| May 29, 1:01 PM EDT | Flash Flood Warning | PBZ | 3 hr |
| May 29, 1:30 PM EDT | Flash Flood Warning | PBZ | 3 hr |
| Jun 3, 5:11 AM EDT | Areal Flood Advisory | PBZ | 3 hr |
| Jun 3, 6:16 AM EDT | Flash Flood Warning | PBZ | 3 hr |
| Jun 6, 11:41 AM EDT | Mesoscale Discussion | SPC | 64 min |
| Jun 6, 3:11 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 6, 9:51 PM EDT | Areal Flood Advisory | PBZ | 4 hr |
| Jun 7, 2:01 PM EDT | Special Weather Statement | PBZ | 29 min |
| Jun 7, 2:31 PM EDT | Special Weather Statement | PBZ | 29 min |
| Jun 11, 2:32 PM EDT | Mesoscale Discussion | SPC | 58 min |
| Jun 11, 5:32 PM EDT | Special Weather Statement | PBZ | 43 min |
| Jun 11, 6:08 PM EDT | Special Weather Statement | PBZ | 22 min |
| Jun 11, 6:09 PM EDT | Special Weather Statement | PBZ | 21 min |
| Jun 16, 12:14 PM EDT | Special Weather Statement | PBZ | 46 min |
| Jun 16, 1:08 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Jun 16, 1:58 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 16, 3:32 PM EDT | Areal Flood Advisory | PBZ | 3 hr |
| Jun 16, 3:43 PM EDT | Severe Thunderstorm Warning | PBZ | 62 min |
| Jun 16, 3:49 PM EDT | Flash Flood Warning | PBZ | 3 hr |
| Jun 16, 3:55 PM EDT | Flash Flood Watch | PBZ | 11 hr |
| Jun 16, 3:57 PM EDT | Flash Flood Warning | PBZ | 4 hr |
| Jun 16, 4:12 PM EDT | Flash Flood Warning | PBZ | 3 hr |
| Jun 16, 4:20 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Jun 16, 10:17 PM EDT | Areal Flood Advisory | PBZ | 3 hr |
| Jun 16, 10:28 PM EDT | Areal Flood Warning | PBZ | 3 hr |
| Jun 16, 11:24 PM EDT | Areal Flood Warning | PBZ | 3 hr |
| Jun 22, 3:59 AM EDT | Flash Flood Watch | PBZ | 32 hr |
| Jul 7, 8:30 PM EDT | Areal Flood Advisory | PBZ | 2 hr |
| Jul 7, 8:46 PM EDT | Areal Flood Advisory | PBZ | 119 min |
| Jul 7, 9:08 PM EDT | Areal Flood Advisory | PBZ | 3 hr |
| Jul 14, 7:40 PM EDT | Special Weather Statement | PBZ | 35 min |
| Jul 14, 8:17 PM EDT | Areal Flood Advisory | PBZ | 118 min |
| Jul 23, 2:34 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 23, 3:04 PM EDT | Special Weather Statement | PBZ | 26 min |
| Jul 23, 3:30 PM EDT | Special Weather Statement | PBZ | 45 min |
| Jul 23, 4:12 PM EDT | Areal Flood Warning | PBZ | 3 hr |
| Jul 23, 4:33 PM EDT | Severe Thunderstorm Warning | PBZ | 42 min |
| Jul 23, 6:28 PM EDT | Areal Flood Advisory | PBZ | 3 hr |
| Jul 24, 1:47 AM EDT | Heat Advisory | PBZ | 18 hr |
| Jul 24, 1:03 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 24, 2:59 PM EDT | Severe Thunderstorm Warning | PBZ | 46 min |
| Jul 24, 3:49 PM EDT | Severe Thunderstorm Warning | PBZ | 41 min |
| Jul 24, 3:54 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 24, 4:25 PM EDT | Severe Thunderstorm Warning | PBZ | 50 min |
| Jul 25, 12:41 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Jul 25, 2:24 PM EDT | Severe Thunderstorm Warning | PBZ | 36 min |
| Jul 25, 3:03 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Jul 25, 3:07 PM EDT | Severe Thunderstorm Warning | PBZ | 38 min |
| Jul 25, 3:12 PM EDT | Severe Thunderstorm Warning | PBZ | 37 min |
| Jul 25, 3:41 PM EDT | Severe Thunderstorm Warning | PBZ | 49 min |
| Jul 25, 4:52 PM EDT | Mesoscale Discussion | SPC | 83 min |
| Jul 30, 9:10 AM EDT | Areal Flood Advisory | PBZ | 2 hr |
| Jul 30, 10:21 AM EDT | Areal Flood Warning | PBZ | 114 min |
| Jul 30, 11:15 AM EDT | Areal Flood Warning | PBZ | 3 hr |
| Jul 30, 1:06 PM EDT | Areal Flood Advisory | PBZ | 3 hr |
| Jul 30, 8:00 PM EDT | Special Weather Statement | PBZ | 30 min |
| Jul 30, 8:43 PM EDT | Areal Flood Advisory | PBZ | 3 hr |
| Jul 30, 9:05 PM EDT | Areal Flood Warning | PBZ | 3 hr |
| Jul 31, 9:23 PM EDT | Special Weather Statement | PBZ | 37 min |
| Aug 12, 4:45 PM EDT | Areal Flood Advisory | PBZ | 3 hr |
| Aug 14, 2:56 PM EDT | Areal Flood Advisory | PBZ | 3 hr |
| Aug 15, 12:46 PM EDT | Special Weather Statement | PBZ | 29 min |
| Aug 16, 5:16 PM EDT | Special Weather Statement | PBZ | 29 min |
| Aug 16, 5:35 PM EDT | Severe Thunderstorm Warning | PBZ | 40 min |
| Aug 17, 2:27 PM EDT | Special Weather Statement | PBZ | 33 min |
| Aug 17, 3:01 PM EDT | Severe Thunderstorm Warning | PBZ | 29 min |
| Aug 17, 3:16 PM EDT | Areal Flood Advisory | PBZ | 119 min |
| Aug 25, 5:42 PM EDT | Mesoscale Discussion | SPC | 93 min |
| Aug 28, 6:16 PM EDT | Severe Thunderstorm Warning | PBZ | 44 min |
| Aug 28, 6:29 PM EDT | Areal Flood Warning | PBZ | 3 hr |
| Aug 28, 7:02 PM EDT | Severe Thunderstorm Warning | PBZ | 28 min |
| Aug 28, 7:13 PM EDT | Areal Flood Warning | PBZ | 3 hr |
| Aug 28, 7:34 PM EDT | Severe Thunderstorm Warning | PBZ | 56 min |
| Aug 28, 7:35 PM EDT | Areal Flood Warning | PBZ | 3 hr |
| Aug 28, 8:08 PM EDT | Special Weather Statement | PBZ | 52 min |
| Sep 7, 3:35 PM EDT | Severe Thunderstorm Warning | PBZ | 25 min |
| Sep 7, 3:48 PM EDT | Severe Thunderstorm Warning | PBZ | 27 min |
| Sep 7, 3:48 PM EDT | Severe Thunderstorm Warning | PBZ | 27 min |
| Sep 7, 4:11 PM EDT | Severe Thunderstorm Warning | PBZ | 19 min |
| Sep 7, 4:30 PM EDT | Severe Thunderstorm Warning | PBZ | 30 min |
| Sep 10, 3:30 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Sep 10, 8:06 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Sep 10, 8:45 PM EDT | Special Weather Statement | PBZ | 60 min |
| Sep 17, 4:23 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 1, 6:07 PM EDT | Special Weather Statement | PBZ | 38 min |
| Oct 1, 6:12 PM EDT | Severe Thunderstorm Warning | PBZ | 33 min |
| Oct 3, 12:39 AM EDT | Dense Fog Advisory | PBZ | 9 hr |
| Oct 4, 12:46 AM EDT | Dense Fog Advisory | PBZ | 9 hr |
| Oct 10, 10:15 AM EDT | Frost Advisory | PBZ | 23 hr |
| Oct 13, 2:16 PM EDT | Frost Advisory | PBZ | 19 hr |
| Oct 20, 2:36 AM EDT | Special Weather Statement | PBZ | 39 min |
| Oct 20, 11:45 AM EDT | Flash Flood Watch | PBZ | 21 hr |
| Oct 20, 2:28 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Oct 20, 3:46 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Oct 20, 5:11 PM EDT | Special Weather Statement | PBZ | 34 min |
| Nov 17, 3:18 AM EST | Dense Fog Advisory | PBZ | 7 hr |
| Dec 11, 2:44 AM EST | Freezing Rain Advisory | PBZ | 26 hr |
| Dec 11, 10:05 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Dec 13, 1:43 PM EST | Winter Weather Advisory | PBZ | 8 hr |
| Dec 14, 10:28 AM EST | Wind Chill Advisory | PBZ | 47 hr |
| Dec 15, 2:27 PM EST | Winter Storm Watch | PBZ | 15 hr |
| Dec 16, 5:05 AM EST | Winter Storm Warning | PBZ | 35 hr |
| Dec 16, 11:42 PM EST | Mesoscale Discussion | SPC | 5 hr |
| Dec 17, 3:08 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Dec 17, 10:59 AM EST | River Flood Advisory | PBZ | 65 hr |
| Dec 18, 3:06 AM EST | Areal Flood Advisory | PBZ | 3 hr |
| Dec 18, 4:07 AM EST | Areal Flood Warning | PBZ | 9 hr |
| Dec 18, 6:23 AM EST | Winter Weather Advisory | PBZ | 6 hr |
| Dec 30, 4:24 AM EST | Special Weather Statement | PBZ | 21 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 | 21 |
| Severe Thunderstorm Watch | 4 |
| Mesoscale Discussion | 18 |
| Special Weather Statement | 36 |
| Flooding | |
| Areal Flood Warning | 10 |
| Flash Flood Warning | 6 |
| Flash Flood Watch | 3 |
| Areal Flood Advisory | 16 |
| River Flood Advisory | 2 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 1 |
| Freezing Rain Advisory | 1 |
| Winter Weather Advisory | 9 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Freeze Warning | 1 |
| Freeze Watch | 1 |
| Frost Advisory | 3 |
| Wind Chill Advisory | 3 |
| Wind and dust | |
| Wind Advisory | 4 |
| Fire | |
| Red Flag Warning | 1 |
| 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 archive20152017
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.