Alert archive / Pennsylvania / Mercer County
Weather alerts in Mercer County, Pennsylvania, 2014
114 weather alerts in 2014, 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 2014. Tap one for its archive.
- Alerts
- 114
- Warnings
- 21
- Watches
- 15
- Advisories
- 39
- Busiest month
- June21 alerts
- Busiest day
- June 18, 20149 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
1 of 1 tornado warnings covering Mercer County in 2014 had a tornado report inside them; 2 of 2 tornado reports fell inside a warning, on average 2 minutes after it went out.
Mercer County, 2014
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 1 | 0% | 2 | 100% | 2 min |
| Severe thunderstorm warnings | 13 | 9 | 31% | 16 | 50% | 26 min |
| Flash flood warnings | 1 | 1 | 0% | 3 | 67% | 40 min |
Each office's whole area, 2014
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Pittsburgh, PA: tornado warnings | 9 | 2 | 78% | 6 | 67% | 6 min |
| NWS Pittsburgh, PA: severe thunderstorm warnings | 147 | 106 | 28% | 399 | 80% | 22 min |
| NWS Pittsburgh, PA: flash flood warnings | 15 | 10 | 33% | 31 | 87% | 51 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, 2:28 PM EST | Wind Chill Advisory | PBZ | 61 hr |
| Jan 1, 2:28 PM EST | Winter Weather Advisory | PBZ | 46 hr |
| Jan 4, 3:37 AM EST | Wind Chill Watch | PBZ | 24 hr |
| Jan 5, 3:53 AM EST | Wind Chill Warning | PBZ | 61 hr |
| Jan 5, 3:05 PM EST | Winter Weather Advisory | PBZ | 26 hr |
| Jan 6, 1:01 AM EST | Special Weather Statement | PBZ | 59 min |
| Jan 7, 5:18 PM EST | Wind Chill Advisory | PBZ | 15 hr |
| Jan 21, 3:16 AM EST | Wind Chill Advisory | PBZ | 33 hr |
| Jan 23, 3:56 AM EST | Wind Chill Advisory | PBZ | 32 hr |
| Jan 23, 3:22 PM EST | Winter Weather Advisory | PBZ | 62 hr |
| Jan 24, 9:44 PM EST | Wind Chill Advisory | PBZ | 37 hr |
| Jan 25, 3:24 PM EST | Special Weather Statement | PBZ | 51 min |
| Jan 26, 3:34 AM EST | Wind Chill Watch | PBZ | 23 hr |
| Jan 26, 3:18 PM EST | Wind Chill Advisory | PBZ | 33 hr |
| Jan 26, 3:18 PM EST | Winter Weather Advisory | PBZ | 23 hr |
| Jan 27, 2:13 AM EST | Wind Chill Warning | PBZ | 58 hr |
| Jan 28, 11:58 AM EST | Wind Chill Advisory | PBZ | 24 hr |
| Feb 3, 3:25 AM EST | Winter Storm Watch | PBZ | 24 hr |
| Feb 4, 3:40 AM EST | Winter Storm Warning | PBZ | 32 hr |
| Feb 4, 8:12 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 17, 3:45 AM EST | Winter Weather Advisory | PBZ | 30 hr |
| Feb 20, 3:47 AM EST | Wind Advisory | PBZ | 37 hr |
| Feb 26, 2:50 PM EST | Wind Chill Advisory | PBZ | 18 hr |
| Feb 27, 9:14 AM EST | Wind Chill Advisory | PBZ | 12 hr |
| Feb 27, 9:45 AM EST | Special Weather Statement | PBZ | 2 hr |
| Feb 27, 10:18 AM EST | Winter Weather Advisory | PBZ | 3 hr |
| Feb 28, 10:00 AM EST | Winter Storm Watch | PBZ | 30 hr |
| Mar 1, 4:24 PM EST | Winter Weather Advisory | PBZ | 22 hr |
| Mar 2, 5:16 PM EST | Wind Chill Advisory | PBZ | 13 hr |
| Mar 11, 3:08 PM EDT | Winter Weather Advisory | PBZ | 31 hr |
| Mar 12, 4:19 AM EDT | Wind Chill Advisory | PBZ | 30 hr |
| Mar 25, 7:10 PM EDT | Special Weather Statement | PBZ | 65 min |
| Mar 29, 2:11 PM EDT | Winter Weather Advisory | PBZ | 22 hr |
| Apr 4, 5:03 PM EDT | Special Weather Statement | PBZ | 42 min |
| Apr 4, 5:27 PM EDT | Severe Thunderstorm Warning | PBZ | 33 min |
| Apr 4, 5:54 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Apr 12, 4:15 AM EDT | Dense Fog Advisory | PBZ | 5 hr |
| May 12, 10:53 PM EDT | Areal Flood Advisory | PBZ | 3 hr |
| May 14, 4:45 AM EDT | Areal Flood Advisory | PBZ | 4 hr |
| May 14, 5:50 PM EDT | Mesoscale Discussion | SPC | 85 min |
| May 14, 7:01 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| May 14, 7:08 PM EDT | Severe Thunderstorm Warning | PBZ | 52 min |
| May 14, 7:40 PM EDT | Flash Flood Watch | PBZ | 30 hr |
| May 14, 7:57 PM EDT | Severe Thunderstorm Warning | PBZ | 48 min |
| May 14, 9:33 PM EDT | Mesoscale Discussion | SPC | 87 min |
| May 17, 2:35 PM EDT | Frost Advisory | PBZ | 17 hr |
| May 18, 2:30 PM EDT | Frost Advisory | PBZ | 18 hr |
| May 21, 11:25 PM EDT | Special Weather Statement | PBZ | 50 min |
| May 21, 11:31 PM EDT | Severe Thunderstorm Warning | PBZ | 59 min |
| May 22, 12:31 AM EDT | Severe Thunderstorm Warning | PBZ | 44 min |
| Jun 3, 12:10 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 8, 11:37 AM EDT | Mesoscale Discussion | SPC | 53 min |
| Jun 8, 1:20 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 11, 5:50 PM EDT | Severe Thunderstorm Warning | PBZ | 25 min |
| Jun 16, 2:01 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Jun 16, 4:10 PM EDT | Special Weather Statement | PBZ | 65 min |
| Jun 17, 10:44 PM EDT | Special Weather Statement | PBZ | 46 min |
| Jun 17, 11:06 PM EDT | Severe Thunderstorm Warning | PBZ | 24 min |
| Jun 17, 11:28 PM EDT | Severe Thunderstorm Warning | PBZ | 47 min |
| Jun 18, 5:46 PM EDT | Flash Flood Watch | PBZ | 15 hr |
| Jun 18, 6:30 PM EDT | Mesoscale Discussion | SPC | 60 min |
| Jun 18, 6:33 PM EDT | Special Weather Statement | PBZ | 27 min |
| Jun 18, 6:45 PM EDT | Severe Thunderstorm Warning | PBZ | 60 min |
| Jun 18, 7:00 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 18, 7:46 PM EDT | Severe Thunderstorm Warning | PBZ | 44 min |
| Jun 18, 8:15 PM EDT | Areal Flood Warning | PBZ | 6 hr |
| Jun 23, 5:53 PM EDT | Special Weather Statement | PBZ | 37 min |
| Jun 23, 6:46 PM EDT | Special Weather Statement | PBZ | 44 min |
| Jun 23, 7:24 PM EDT | Severe Thunderstorm Warning | PBZ | 51 min |
| Jun 24, 12:02 PM EDT | Flash Flood Watch | PBZ | 26 hr |
| Jun 24, 2:18 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Jul 1, 3:22 PM EDT | Mesoscale Discussion | SPC | 53 min |
| Jul 7, 2:10 PM EDT | Mesoscale Discussion | SPC | 65 min |
| Jul 7, 2:45 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 8, 8:58 AM EDT | Mesoscale Discussion | SPC | 62 min |
| Jul 8, 11:29 AM EDT | Mesoscale Discussion | SPC | 91 min |
| Jul 8, 1:04 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 8, 2:47 PM EDT | Tornado Warning | PBZ | 32 min |
| Jul 13, 12:37 PM EDT | Mesoscale Discussion | SPC | 53 min |
| Jul 13, 1:17 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 14, 9:50 PM EDT | Special Weather Statement | PBZ | 40 min |
| Jul 27, 1:44 PM EDT | Tornado Watch | SPC | 9 hr |
| Jul 27, 5:37 PM EDT | Areal Flood Warning | PBZ | 8 hr |
| Jul 27, 8:49 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Jul 27, 9:50 PM EDT | Severe Thunderstorm Warning | PBZ | 44 min |
| Aug 3, 5:46 PM EDT | Areal Flood Warning | PBZ | 3 hr |
| Aug 12, 12:26 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 12, 5:06 PM EDT | Special Weather Statement | PBZ | 24 min |
| Aug 21, 2:24 PM EDT | Special Weather Statement | PBZ | 36 min |
| Aug 21, 3:53 PM EDT | Flash Flood Warning | PBZ | 5 hr |
| Sep 2, 2:25 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 2, 3:37 PM EDT | Severe Thunderstorm Warning | PBZ | 25 min |
| Sep 3, 5:57 AM EDT | Dense Fog Advisory | PBZ | 3 hr |
| Sep 10, 6:11 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Sep 21, 1:20 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Oct 2, 3:48 AM EDT | Dense Fog Advisory | PBZ | 6 hr |
| Oct 10, 3:25 PM EDT | Freeze Watch | PBZ | 23 hr |
| Oct 11, 2:31 PM EDT | Frost Advisory | PBZ | 18 hr |
| Oct 16, 4:08 AM EDT | Dense Fog Advisory | PBZ | 5 hr |
| Nov 16, 3:34 AM EST | Winter Weather Advisory | PBZ | 35 hr |
| Nov 21, 9:32 PM EST | Freezing Rain Advisory | PBZ | 16 hr |
| Nov 23, 2:42 PM EST | Wind Advisory | PBZ | 29 hr |
| Nov 24, 10:17 AM EST | Mesoscale Discussion | SPC | 2 hr |
| Nov 27, 11:08 PM EST | Lake Effect Snow Advisory | PBZ | 11 hr |
| Dec 1, 9:40 PM EST | Winter Weather Advisory | PBZ | 21 hr |
| Dec 11, 10:47 AM EST | Winter Weather Advisory | PBZ | 12 hr |
| Dec 12, 9:19 PM EST | Special Weather Statement | PBZ | 3 hr |
| Dec 13, 4:45 PM EST | Freezing Rain Advisory | PBZ | 16 hr |
| Dec 18, 10:39 PM EST | Winter Weather Advisory | PBZ | 10 hr |
| Dec 24, 3:47 AM EST | Wind Advisory | PBZ | 24 hr |
| Dec 24, 4:23 PM EST | Severe Thunderstorm Watch | SPC | 5 hr |
| Dec 24, 7:48 PM EST | Mesoscale Discussion | SPC | 57 min |
| Dec 24, 8:39 PM EST | Special Weather Statement | PBZ | 51 min |
| Dec 24, 8:40 PM EST | Special Weather Statement | PBZ | 50 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 archive20132015
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.