Alert archive / Pennsylvania / Mercer County
Weather alerts in Mercer County, Pennsylvania, 2013
132 weather alerts in 2013, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Mercer County and its neighbors
Each county as a circle sized by its count in 2013. Tap one for its archive.
- Alerts
- 132
- Warnings
- 27
- Watches
- 22
- Advisories
- 30
- Busiest month
- June19 alerts
- Busiest day
- April 10, 20138 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Mercer County, 2013
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 17 | 15 | 12% | 31 | 94% | 21 min |
| Flash flood warnings | 1 | 1 | 0% | 1 | 100% | 211 min |
Each office's whole area, 2013
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Pittsburgh, PA: tornado warnings | 15 | 3 | 80% | 5 | 60% | 15 min |
| NWS Pittsburgh, PA: severe thunderstorm warnings | 262 | 223 | 15% | 746 | 84% | 24 min |
| NWS Pittsburgh, PA: flash flood warnings | 48 | 37 | 23% | 127 | 87% | 80 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, 6:33 PM EST | Dense Fog Advisory | PBZ | 16 hr |
| Jan 20, 5:16 AM EST | Wind Advisory | PBZ | 6 hr |
| Jan 20, 4:09 PM EST | Winter Weather Advisory | PBZ | 50 hr |
| Jan 21, 3:04 AM EST | Wind Chill Advisory | PBZ | 58 hr |
| Jan 24, 7:23 AM EST | Special Weather Statement | PBZ | 52 min |
| Jan 24, 3:18 PM EST | Winter Weather Advisory | PBZ | 27 hr |
| Jan 27, 4:04 AM EST | Winter Weather Advisory | PBZ | 31 hr |
| Jan 27, 10:21 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Jan 28, 12:22 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Jan 30, 4:30 AM EST | Wind Advisory | PBZ | 29 hr |
| Feb 1, 3:39 AM EST | Lake Effect Snow Advisory | PBZ | 11 hr |
| Feb 1, 3:32 PM EST | Winter Weather Advisory | PBZ | 55 hr |
| Feb 7, 2:30 PM EST | Winter Weather Advisory | PBZ | 43 hr |
| Feb 11, 3:54 AM EST | Wind Advisory | PBZ | 28 hr |
| Feb 18, 11:52 PM EST | Wind Advisory | PBZ | 11 hr |
| Feb 20, 1:25 PM EST | Special Weather Statement | PBZ | 3 hr |
| Feb 21, 3:03 PM EST | Winter Weather Advisory | PBZ | 31 hr |
| Mar 16, 8:00 AM EDT | Special Weather Statement | PBZ | 45 min |
| Mar 16, 8:47 AM EDT | Special Weather Statement | PBZ | 58 min |
| Mar 16, 9:58 AM EDT | Special Weather Statement | PBZ | 47 min |
| Mar 16, 10:47 AM EDT | Special Weather Statement | PBZ | 88 min |
| Mar 17, 3:27 AM EDT | Winter Storm Warning | PBZ | 39 hr |
| Mar 17, 3:27 AM EDT | Winter Weather Advisory | PBZ | 35 hr |
| Mar 18, 3:44 PM EDT | Winter Weather Advisory | PBZ | 6 hr |
| Mar 21, 4:00 AM EDT | Lake Effect Snow Advisory | PBZ | 31 hr |
| Mar 23, 3:53 AM EDT | Winter Storm Watch | PBZ | 16 hr |
| Mar 23, 8:21 PM EDT | Winter Weather Advisory | PBZ | 42 hr |
| Mar 25, 5:31 AM EDT | Mesoscale Discussion | SPC | 6 hr |
| Apr 5, 11:21 AM EDT | Red Flag Warning | PBZ | 10 hr |
| Apr 9, 12:37 AM EDT | Special Weather Statement | PBZ | 23 min |
| Apr 10, 12:55 PM EDT | Special Weather Statement | PBZ | 65 min |
| Apr 10, 1:33 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Apr 10, 2:56 PM EDT | Special Weather Statement | PBZ | 34 min |
| Apr 10, 3:12 PM EDT | Special Weather Statement | PBZ | 33 min |
| Apr 10, 4:09 PM EDT | Special Weather Statement | PBZ | 51 min |
| Apr 10, 5:34 PM EDT | Severe Thunderstorm Warning | PBZ | 56 min |
| Apr 10, 5:59 PM EDT | Mesoscale Discussion | SPC | 61 min |
| Apr 10, 6:12 PM EDT | Severe Thunderstorm Warning | PBZ | 63 min |
| Apr 11, 3:53 AM EDT | Flood Watch | PBZ | 24 hr |
| Apr 16, 3:42 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Apr 19, 11:30 AM EDT | Special Weather Statement | PBZ | 60 min |
| Apr 19, 12:29 PM EDT | Special Weather Statement | PBZ | 61 min |
| May 10, 2:21 PM EDT | Mesoscale Discussion | SPC | 54 min |
| May 10, 4:40 PM EDT | Special Weather Statement | PBZ | 65 min |
| May 12, 3:39 AM EDT | Freeze Watch | PBZ | 34 hr |
| May 12, 2:31 PM EDT | Freeze Warning | PBZ | 18 hr |
| May 13, 1:43 PM EDT | Freeze Warning | PBZ | 18 hr |
| May 22, 2:08 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 22, 2:27 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 24, 3:41 AM EDT | Freeze Warning | PBZ | 28 hr |
| May 25, 3:50 AM EDT | Frost Advisory | PBZ | 28 hr |
| May 25, 3:50 AM EDT | Freeze Warning | PBZ | 28 hr |
| May 25, 3:04 PM EDT | Freeze Watch | PBZ | 23 hr |
| May 26, 1:52 PM EDT | Frost Advisory | PBZ | 18 hr |
| May 28, 8:24 PM EDT | Severe Thunderstorm Warning | PBZ | 51 min |
| May 28, 8:42 PM EDT | Mesoscale Discussion | SPC | 93 min |
| May 31, 6:13 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 2, 11:07 AM EDT | Special Weather Statement | PBZ | 38 min |
| Jun 12, 4:10 AM EDT | Flash Flood Watch | PBZ | 37 hr |
| Jun 12, 11:53 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 13, 2:40 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 13, 3:18 AM EDT | Severe Thunderstorm Warning | PBZ | 57 min |
| Jun 13, 3:51 AM EDT | Severe Thunderstorm Warning | PBZ | 54 min |
| Jun 25, 12:22 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 25, 3:04 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Jun 25, 3:37 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 25, 4:42 PM EDT | Severe Thunderstorm Warning | PBZ | 63 min |
| Jun 25, 5:03 PM EDT | Severe Thunderstorm Warning | PBZ | 57 min |
| Jun 25, 5:27 PM EDT | Mesoscale Discussion | SPC | 93 min |
| Jun 25, 5:37 PM EDT | Severe Thunderstorm Warning | PBZ | 68 min |
| Jun 25, 8:44 PM EDT | Mesoscale Discussion | SPC | 61 min |
| Jun 25, 9:34 PM EDT | Severe Thunderstorm Warning | PBZ | 56 min |
| Jun 26, 11:34 AM EDT | Flash Flood Watch | PBZ | 14 hr |
| Jun 27, 8:50 AM EDT | Flood Watch | PBZ | 9 hr |
| Jun 27, 9:09 AM EDT | Special Weather Statement | PBZ | 51 min |
| Jun 28, 1:02 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Jul 9, 1:03 PM EDT | Flash Flood Watch | PBZ | 31 hr |
| Jul 10, 6:59 AM EDT | Special Weather Statement | PBZ | 91 min |
| Jul 10, 12:31 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 10, 2:45 PM EDT | Special Weather Statement | PBZ | 30 min |
| Jul 10, 2:51 PM EDT | Severe Thunderstorm Warning | PBZ | 24 min |
| Jul 10, 3:10 PM EDT | Severe Thunderstorm Warning | PBZ | 50 min |
| Jul 10, 3:29 PM EDT | Flash Flood Warning | PBZ | 4 hr |
| Jul 10, 3:37 PM EDT | Severe Thunderstorm Warning | PBZ | 38 min |
| Jul 10, 3:49 PM EDT | Severe Thunderstorm Warning | PBZ | 41 min |
| Jul 17, 9:09 PM EDT | Heat Advisory | PBZ | 23 hr |
| Jul 19, 1:48 AM EDT | Heat Advisory | PBZ | 16 hr |
| Jul 20, 4:13 AM EDT | Special Weather Statement | PBZ | 62 min |
| Jul 23, 12:44 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Jul 23, 1:54 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 23, 4:02 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Jul 23, 6:57 PM EDT | Mesoscale Discussion | SPC | 93 min |
| Aug 7, 2:59 PM EDT | Special Weather Statement | PBZ | 61 min |
| Aug 7, 3:24 PM EDT | Mesoscale Discussion | SPC | 66 min |
| Aug 7, 3:49 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 8, 3:45 PM EDT | Mesoscale Discussion | SPC | 90 min |
| Aug 8, 3:51 PM EDT | Special Weather Statement | PBZ | 39 min |
| Aug 8, 4:36 PM EDT | Severe Thunderstorm Warning | PBZ | 39 min |
| Aug 8, 5:39 PM EDT | Areal Flood Advisory | PBZ | 3 hr |
| Sep 1, 7:36 PM EDT | Areal Flood Advisory | PBZ | 4 hr |
| Sep 2, 12:33 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Sep 11, 11:42 AM EDT | Mesoscale Discussion | SPC | 63 min |
| Sep 11, 12:33 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Sep 11, 2:47 PM EDT | Mesoscale Discussion | SPC | 58 min |
| Sep 11, 4:30 PM EDT | Special Weather Statement | PBZ | 45 min |
| Sep 11, 4:32 PM EDT | Special Weather Statement | PBZ | 58 min |
| Sep 11, 5:01 PM EDT | Areal Flood Advisory | PBZ | 3 hr |
| Sep 23, 2:49 PM EDT | Frost Advisory | PBZ | 18 hr |
| Nov 1, 12:46 AM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Nov 17, 4:00 AM EST | Wind Advisory | PBZ | 31 hr |
| Nov 17, 7:36 PM EST | Mesoscale Discussion | SPC | 54 min |
| Nov 17, 8:23 PM EST | Severe Thunderstorm Watch | SPC | 4 hr |
| Nov 17, 8:58 PM EST | Severe Thunderstorm Warning | PBZ | 62 min |
| Nov 17, 9:33 PM EST | Severe Thunderstorm Warning | PBZ | 57 min |
| Nov 17, 9:46 PM EST | High Wind Warning | PBZ | 5 hr |
| Nov 17, 9:46 PM EST | Wind Advisory | PBZ | 14 hr |
| Nov 22, 1:59 PM EST | Lake Effect Snow Watch | PBZ | 14 hr |
| Nov 23, 3:29 AM EST | Lake Effect Snow Warning | PBZ | 39 hr |
| Nov 23, 12:52 PM EST | Special Weather Statement | PBZ | 53 min |
| Nov 24, 3:12 PM EST | Winter Storm Watch | PBZ | 24 hr |
| Nov 25, 3:29 PM EST | Winter Storm Warning | PBZ | 60 hr |
| Nov 26, 6:15 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Dec 5, 4:01 PM EST | Winter Weather Advisory | PBZ | 32 hr |
| Dec 6, 4:37 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Dec 6, 4:02 PM EST | Mesoscale Discussion | SPC | 3 hr |
| Dec 7, 3:51 PM EST | Winter Weather Advisory | PBZ | 41 hr |
| Dec 13, 2:56 AM EST | Winter Weather Advisory | PBZ | 47 hr |
| Dec 19, 2:56 PM EST | Flood Watch | PBZ | 3 days |
| Dec 22, 12:55 AM EST | Mesoscale Discussion | SPC | 95 min |
| Dec 22, 1:36 AM EST | Severe Thunderstorm Watch | SPC | 3 hr |
| Dec 22, 1:58 AM EST | Severe Thunderstorm Warning | PBZ | 62 min |
| Dec 31, 5:54 AM EST | Special Weather Statement | PBZ | 51 min |
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 archive20122014
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.