Alert archive / Pennsylvania / Allegheny County
Weather alerts in Allegheny County, Pennsylvania, 2010
209 weather alerts in 2010, 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 2010. Tap one for its archive.
- Alerts
- 209
- Warnings
- 56
- Watches
- 54
- Advisories
- 33
- Busiest month
- June54 alerts
- Busiest day
- December 1, 201019 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 Allegheny County in 2010 had a tornado report inside them.
Allegheny County, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 26 | 19 | 27% | 22 | 86% | 29 min |
| Flash flood warnings | 4 | 3 | 25% | 5 | 80% | 89 min |
Each office's whole area, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Pittsburgh, PA: tornado warnings | 13 | 1 | 92% | 4 | 25% | 4 min |
| NWS Pittsburgh, PA: severe thunderstorm warnings | 204 | 124 | 39% | 290 | 82% | 26 min |
| NWS Pittsburgh, PA: flash flood warnings | 24 | 15 | 38% | 29 | 90% | 73 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, 2:11 PM EST | Winter Weather Advisory | PBZ | 5 days |
| Jan 6, 8:56 AM EST | Winter Weather Advisory | PBZ | 3 hr |
| Jan 6, 3:27 PM EST | Winter Weather Advisory | PBZ | 67 hr |
| Jan 21, 2:31 PM EST | Winter Weather Advisory | PBZ | 22 hr |
| Jan 24, 4:34 AM EST | Flood Watch | PBZ | 38 hr |
| Jan 24, 12:46 PM EST | River Flood Advisory | PBZ | 24 hr |
| Jan 24, 9:54 PM EST | River Flood Watch | PBZ | 14 hr |
| Jan 24, 9:54 PM EST | River Flood Watch | PBZ | 14 hr |
| Jan 24, 9:54 PM EST | River Flood Watch | PBZ | 14 hr |
| Jan 25, 11:50 AM EST | River Flood Warning | PBZ | 32 hr |
| Jan 25, 11:50 AM EST | River Flood Warning | PBZ | 26 hr |
| Jan 25, 5:38 PM EST | River Flood Warning | PBZ | 13 hr |
| Jan 26, 8:45 PM EST | River Flood Advisory | PBZ | 43 hr |
| Jan 28, 9:41 AM EST | Winter Weather Advisory | PBZ | 6 hr |
| Feb 3, 3:00 PM EST | Winter Storm Watch | PBZ | 24 hr |
| Feb 4, 2:31 PM EST | Winter Storm Warning | PBZ | 50 hr |
| Feb 7, 3:04 PM EST | Winter Storm Watch | PBZ | 24 hr |
| Feb 8, 3:19 PM EST | Winter Storm Warning | PBZ | 54 hr |
| Feb 14, 4:52 PM EST | Winter Weather Advisory | PBZ | 4 days |
| Feb 15, 1:41 PM EST | Mesoscale Discussion | SPC | 5 hr |
| Feb 18, 12:05 PM EST | Winter Weather Advisory | PBZ | 4 hr |
| Feb 25, 2:54 AM EST | Winter Weather Advisory | PBZ | 50 hr |
| Mar 10, 4:19 AM EST | Flood Watch | PBZ | 4 days |
| Mar 11, 12:31 PM EST | River Flood Advisory | PBZ | 5 days |
| Mar 11, 12:42 PM EST | River Flood Watch | PBZ | 58 hr |
| Mar 11, 12:42 PM EST | River Flood Watch | PBZ | 47 hr |
| Mar 11, 12:42 PM EST | River Flood Watch | PBZ | 23 hr |
| Mar 11, 12:42 PM EST | River Flood Watch | PBZ | 58 hr |
| Mar 11, 12:42 PM EST | River Flood Watch | PBZ | 58 hr |
| Mar 11, 12:42 PM EST | River Flood Watch | PBZ | 47 hr |
| Mar 12, 11:54 AM EST | River Flood Warning | PBZ | 52 hr |
| Mar 12, 12:09 PM EST | River Flood Watch | PBZ | 23 hr |
| Mar 13, 7:41 AM EST | River Flood Watch | PBZ | 32 hr |
| Mar 13, 7:41 AM EST | River Flood Watch | PBZ | 7 hr |
| Mar 13, 7:41 AM EST | River Flood Watch | PBZ | 7 hr |
| Mar 13, 7:41 AM EST | River Flood Watch | PBZ | 7 hr |
| Mar 13, 7:41 AM EST | River Flood Watch | PBZ | 7 hr |
| Mar 13, 7:41 AM EST | River Flood Watch | PBZ | 7 hr |
| Mar 13, 7:41 AM EST | River Flood Watch | PBZ | 7 hr |
| Mar 13, 7:41 AM EST | River Flood Watch | PBZ | 7 hr |
| Mar 13, 7:41 AM EST | River Flood Watch | PBZ | 7 hr |
| Mar 13, 7:41 AM EST | River Flood Watch | PBZ | 7 hr |
| Mar 16, 10:31 PM EDT | River Flood Advisory | PBZ | 27 hr |
| Mar 22, 12:44 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 22, 6:53 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Apr 3, 3:50 AM EDT | Fire Weather Watch | PBZ | 12 hr |
| Apr 3, 10:18 AM EDT | Red Flag Warning | PBZ | 10 hr |
| Apr 7, 10:01 AM EDT | Red Flag Warning | PBZ | 9 hr |
| Apr 16, 12:44 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 16, 1:28 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Apr 16, 3:23 PM EDT | Severe Thunderstorm Warning | PBZ | 67 min |
| Apr 16, 4:34 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Apr 16, 6:14 PM EDT | Mesoscale Discussion | SPC | 61 min |
| Apr 22, 2:23 PM EDT | Frost Advisory | PBZ | 18 hr |
| Apr 25, 10:56 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 25, 11:54 AM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Apr 25, 2:26 PM EDT | Mesoscale Discussion | SPC | 94 min |
| Apr 25, 2:56 PM EDT | Severe Thunderstorm Warning | PBZ | 49 min |
| Apr 25, 3:43 PM EDT | Severe Thunderstorm Warning | PBZ | 47 min |
| Apr 25, 3:45 PM EDT | Severe Thunderstorm Warning | PBZ | 45 min |
| Apr 27, 3:17 AM EDT | Freeze Watch | PBZ | 11 hr |
| Apr 27, 2:31 PM EDT | Freeze Warning | PBZ | 18 hr |
| Apr 28, 3:09 PM EDT | Frost Advisory | PBZ | 18 hr |
| May 7, 2:38 PM EDT | Wind Advisory | PBZ | 30 hr |
| May 7, 7:25 PM EDT | Mesoscale Discussion | SPC | 95 min |
| May 7, 9:31 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 8, 12:32 AM EDT | Severe Thunderstorm Warning | PBZ | 43 min |
| May 8, 3:04 PM EDT | Freeze Watch | PBZ | 12 hr |
| May 9, 3:22 AM EDT | Freeze Warning | PBZ | 29 hr |
| May 14, 2:29 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 14, 3:52 PM EDT | Severe Thunderstorm Warning | PBZ | 53 min |
| May 23, 2:11 AM EDT | Dense Fog Advisory | PBZ | 7 hr |
| May 28, 5:34 PM EDT | Special Weather Statement | PBZ | 41 min |
| May 28, 6:22 PM EDT | Severe Thunderstorm Warning | PBZ | 38 min |
| May 31, 1:33 PM EDT | Severe Thunderstorm Warning | PBZ | 27 min |
| May 31, 2:23 PM EDT | Special Weather Statement | PBZ | 52 min |
| May 31, 3:20 PM EDT | Flash Flood Watch | PBZ | 12 hr |
| May 31, 5:21 PM EDT | Special Weather Statement | PBZ | 54 min |
| May 31, 6:30 PM EDT | Special Weather Statement | PBZ | 60 min |
| May 31, 7:55 PM EDT | Areal Flood Advisory | PBZ | 3 hr |
| Jun 2, 1:39 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 2, 3:24 PM EDT | Severe Thunderstorm Warning | PBZ | 51 min |
| Jun 2, 4:14 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Jun 2, 4:23 PM EDT | Special Weather Statement | PBZ | 37 min |
| Jun 2, 4:35 PM EDT | Special Weather Statement | PBZ | 40 min |
| Jun 2, 6:29 PM EDT | Severe Thunderstorm Warning | PBZ | 46 min |
| Jun 2, 6:37 PM EDT | Tornado Warning | PBZ | 38 min |
| Jun 2, 7:13 PM EDT | Severe Thunderstorm Warning | PBZ | 47 min |
| Jun 2, 7:19 PM EDT | Mesoscale Discussion | SPC | 56 min |
| Jun 2, 7:56 PM EDT | Severe Thunderstorm Warning | PBZ | 64 min |
| Jun 2, 8:03 PM EDT | Areal Flood Advisory | PBZ | 6 hr |
| Jun 2, 9:49 PM EDT | Special Weather Statement | PBZ | 56 min |
| Jun 2, 10:03 PM EDT | Severe Thunderstorm Warning | PBZ | 57 min |
| Jun 2, 11:31 PM EDT | Special Weather Statement | PBZ | 59 min |
| Jun 4, 1:14 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 4, 4:20 PM EDT | Special Weather Statement | PBZ | 55 min |
| Jun 4, 4:50 PM EDT | Severe Thunderstorm Warning | PBZ | 55 min |
| Jun 4, 6:42 PM EDT | Severe Thunderstorm Warning | PBZ | 63 min |
| Jun 5, 3:15 AM EDT | Flash Flood Watch | PBZ | 32 hr |
| Jun 5, 8:51 AM EDT | Mesoscale Discussion | SPC | 114 min |
| Jun 5, 1:35 PM EDT | Mesoscale Discussion | SPC | 85 min |
| Jun 5, 2:08 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 5, 3:13 PM EDT | Tornado Watch | SPC | 4 hr |
| Jun 5, 4:26 PM EDT | Severe Thunderstorm Warning | PBZ | 64 min |
| Jun 5, 5:02 PM EDT | Flash Flood Warning | PBZ | 3 hr |
| Jun 5, 7:59 PM EDT | Areal Flood Warning | PBZ | 3 hr |
| Jun 6, 2:03 AM EDT | Tornado Watch | SPC | 7 hr |
| Jun 6, 3:38 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 6, 7:05 AM EDT | Mesoscale Discussion | SPC | 115 min |
| Jun 6, 7:51 AM EDT | Tornado Watch | SPC | 7 hr |
| Jun 6, 9:54 AM EDT | Special Weather Statement | PBZ | 21 min |
| Jun 6, 10:22 AM EDT | Special Weather Statement | PBZ | 23 min |
| Jun 13, 2:00 AM EDT | Special Weather Statement | PBZ | 60 min |
| Jun 13, 3:06 AM EDT | Special Weather Statement | PBZ | 54 min |
| Jun 16, 1:39 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Jun 19, 5:03 PM EDT | Special Weather Statement | PBZ | 42 min |
| Jun 19, 5:52 PM EDT | Special Weather Statement | PBZ | 53 min |
| Jun 19, 6:04 PM EDT | Mesoscale Discussion | SPC | 56 min |
| Jun 22, 4:25 AM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 22, 6:49 AM EDT | Special Weather Statement | PBZ | 56 min |
| Jun 22, 7:35 AM EDT | Special Weather Statement | PBZ | 55 min |
| Jun 23, 1:37 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 23, 3:13 PM EDT | Mesoscale Discussion | SPC | 92 min |
| Jun 23, 5:29 PM EDT | Severe Thunderstorm Warning | PBZ | 61 min |
| Jun 23, 6:10 PM EDT | Severe Thunderstorm Warning | PBZ | 65 min |
| Jun 23, 6:53 PM EDT | Areal Flood Advisory | PBZ | 3 hr |
| Jun 24, 9:38 AM EDT | Mesoscale Discussion | SPC | 97 min |
| Jun 24, 10:19 AM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 24, 12:16 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Jun 27, 2:07 PM EDT | Special Weather Statement | PBZ | 53 min |
| Jun 27, 3:04 PM EDT | Special Weather Statement | PBZ | 56 min |
| Jun 27, 3:49 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Jun 28, 5:05 PM EDT | Special Weather Statement | PBZ | 55 min |
| Jun 28, 8:07 PM EDT | Special Weather Statement | PBZ | 23 min |
| Jul 9, 2:41 PM EDT | Flash Flood Warning | PBZ | 3 hr |
| Jul 9, 3:43 PM EDT | Special Weather Statement | PBZ | 62 min |
| Jul 13, 7:27 PM EDT | Flash Flood Warning | PBZ | 3 hr |
| Jul 13, 10:08 PM EDT | Flash Flood Watch | PBZ | 5 hr |
| Jul 13, 10:12 PM EDT | Flash Flood Warning | PBZ | 3 hr |
| Jul 19, 7:06 PM EDT | Special Weather Statement | PBZ | 54 min |
| Jul 21, 2:45 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 21, 6:22 PM EDT | Special Weather Statement | PBZ | 23 min |
| Jul 21, 6:34 PM EDT | Severe Thunderstorm Warning | PBZ | 26 min |
| Jul 23, 3:30 AM EDT | Heat Advisory | PBZ | 40 hr |
| Jul 24, 6:10 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jul 24, 8:50 PM EDT | Severe Thunderstorm Warning | PBZ | 55 min |
| Jul 24, 9:36 PM EDT | Mesoscale Discussion | SPC | 54 min |
| Aug 4, 3:52 PM EDT | Mesoscale Discussion | SPC | 53 min |
| Aug 4, 4:17 PM EDT | Severe Thunderstorm Warning | PBZ | 58 min |
| Aug 4, 4:36 PM EDT | Severe Thunderstorm Warning | PBZ | 39 min |
| Aug 4, 10:08 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 4, 11:52 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Aug 12, 1:35 AM EDT | Areal Flood Advisory | PBZ | 6 hr |
| Aug 14, 7:04 PM EDT | Special Weather Statement | PBZ | 116 min |
| Aug 14, 8:44 PM EDT | Areal Flood Advisory | PBZ | 3 hr |
| Sep 16, 6:04 PM EDT | Mesoscale Discussion | SPC | 56 min |
| Sep 22, 2:34 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Sep 22, 3:18 PM EDT | Special Weather Statement | PBZ | 27 min |
| Sep 22, 3:22 PM EDT | Severe Thunderstorm Warning | PBZ | 53 min |
| Sep 22, 3:44 PM EDT | Severe Thunderstorm Warning | PBZ | 31 min |
| Sep 22, 4:12 PM EDT | Severe Thunderstorm Warning | PBZ | 48 min |
| Sep 28, 4:35 AM EDT | Special Weather Statement | PBZ | 55 min |
| Oct 14, 1:50 PM EDT | Special Weather Statement | PBZ | 25 min |
| Oct 16, 6:34 PM EDT | Frost Advisory | PBZ | 8 hr |
| Oct 19, 2:17 PM EDT | Frost Advisory | PBZ | 19 hr |
| Oct 26, 3:40 AM EDT | Wind Advisory | PBZ | 15 hr |
| Oct 26, 1:09 PM EDT | Mesoscale Discussion | SPC | 66 min |
| Oct 26, 1:36 PM EDT | Tornado Watch | SPC | 7 hr |
| Oct 26, 4:34 PM EDT | Severe Thunderstorm Warning | PBZ | 56 min |
| Oct 26, 5:45 PM EDT | Mesoscale Discussion | SPC | 90 min |
| Nov 16, 7:37 PM EST | Special Weather Statement | PBZ | 53 min |
| Nov 17, 12:09 AM EST | Special Weather Statement | PBZ | 51 min |
| Nov 17, 1:10 AM EST | Special Weather Statement | PBZ | 110 min |
| Nov 23, 4:16 AM EST | Special Weather Statement | PBZ | 59 min |
| Nov 23, 5:15 AM EST | Special Weather Statement | PBZ | 60 min |
| Nov 29, 1:09 PM EST | Flood Watch | PBZ | 39 hr |
| Nov 29, 1:09 PM EST | Wind Advisory | PBZ | 32 hr |
| Nov 29, 1:20 PM EST | River Flood Advisory | PBZ | 69 hr |
| Nov 30, 10:00 AM EST | River Flood Watch | PBZ | 26 hr |
| Nov 30, 10:00 AM EST | River Flood Watch | PBZ | 18 hr |
| Nov 30, 3:10 PM EST | River Flood Watch | PBZ | 13 hr |
| Nov 30, 8:57 PM EST | Areal Flood Advisory | PBZ | 4 hr |
| Nov 30, 10:30 PM EST | River Flood Watch | PBZ | 5 hr |
| Dec 1, 12:52 AM EST | Areal Flood Advisory | PBZ | 6 hr |
| Dec 1, 3:24 AM EST | River Flood Warning | PBZ | 13 hr |
| Dec 1, 3:24 AM EST | River Flood Warning | PBZ | 7 hr |
| Dec 1, 3:24 AM EST | River Flood Warning | PBZ | 7 hr |
| Dec 1, 7:54 AM EST | Areal Flood Advisory | PBZ | 6 hr |
| Dec 1, 10:57 AM EST | River Flood Warning | PBZ | 11 hr |
| Dec 1, 10:57 AM EST | River Flood Warning | PBZ | 11 hr |
| Dec 1, 10:57 AM EST | River Flood Warning | PBZ | 18 hr |
| Dec 1, 10:57 AM EST | River Flood Warning | PBZ | 11 hr |
| Dec 1, 10:57 AM EST | River Flood Warning | PBZ | 6 hr |
| Dec 1, 10:57 AM EST | River Flood Warning | PBZ | 6 hr |
| Dec 1, 10:57 AM EST | River Flood Warning | PBZ | 18 hr |
| Dec 1, 10:57 AM EST | River Flood Warning | PBZ | 18 hr |
| Dec 1, 10:57 AM EST | River Flood Warning | PBZ | 11 hr |
| Dec 1, 11:04 AM EST | River Flood Warning | PBZ | 22 hr |
| Dec 1, 11:04 AM EST | River Flood Warning | PBZ | 10 hr |
| Dec 1, 1:50 PM EST | Areal Flood Advisory | PBZ | 6 hr |
| Dec 10, 2:34 PM EST | Winter Storm Watch | PBZ | 38 hr |
| Dec 12, 3:43 AM EST | Winter Weather Advisory | PBZ | 63 hr |
| Dec 13, 8:13 AM EST | Special Weather Statement | PBZ | 25 hr |
| Dec 13, 9:38 AM EST | Special Weather Statement | PBZ | 52 min |
| Dec 13, 5:09 PM EST | Special Weather Statement | PBZ | 111 min |
| Dec 13, 7:11 PM EST | Special Weather Statement | PBZ | 109 min |
| Dec 14, 6:45 AM EST | Special Weather Statement | PBZ | 2 hr |
| Dec 14, 8:33 AM EST | Special Weather Statement | PBZ | 57 min |
| Dec 29, 10:30 PM EST | Freezing Rain Advisory | PBZ | 13 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20092011
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.