Alert archive / Pennsylvania / Mercer County
Weather alerts in Mercer County, Pennsylvania, 2016
90 weather alerts in 2016, 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 2016. Tap one for its archive.
- Alerts
- 90
- Warnings
- 16
- Watches
- 7
- Advisories
- 28
- Busiest month
- September16 alerts
- Busiest day
- September 10, 20166 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 Mercer County in 2016 had a tornado report inside them.
Mercer County, 2016
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 9 | 8 | 11% | 18 | 89% | 17 min |
| Flash flood warnings | 1 | 1 | 0% | 2 | 100% | 37 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 3, 12:25 PM EST | Lake Effect Snow Advisory | PBZ | 20 hr |
| 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 17, 4:04 AM EST | Wind Chill Advisory | PBZ | 57 hr |
| Feb 7, 8:26 PM EST | Winter Weather Advisory | PBZ | 4 days |
| Feb 10, 4:32 PM EST | Special Weather Statement | PBZ | 88 min |
| Feb 12, 3:29 AM EST | Wind Chill Advisory | PBZ | 54 hr |
| Feb 12, 11:58 AM EST | Lake Effect Snow Advisory | PBZ | 30 hr |
| Feb 12, 7:26 PM EST | Special Weather Statement | PBZ | 79 min |
| Feb 13, 6:49 AM EST | Special Weather Statement | PBZ | 116 min |
| Feb 14, 3:45 PM EST | Winter Weather Advisory | PBZ | 45 hr |
| Feb 15, 3:29 PM EST | Winter Storm Warning | PBZ | 21 hr |
| Feb 25, 3:05 AM EST | Winter Weather Advisory | PBZ | 30 hr |
| Feb 29, 2:12 AM EST | Wind Advisory | PBZ | 7 hr |
| Mar 1, 3:34 AM EST | Wind Advisory | PBZ | 27 hr |
| Mar 24, 11:49 PM EDT | Special Weather Statement | PBZ | 26 min |
| Mar 28, 2:56 AM EDT | Special Weather Statement | PBZ | 49 min |
| Apr 2, 2:07 AM EDT | Wind Advisory | PBZ | 26 hr |
| Apr 8, 3:33 AM EDT | Winter Weather Advisory | PBZ | 39 hr |
| May 15, 2:22 AM EDT | Freeze Watch | PBZ | 12 hr |
| May 15, 2:18 PM EDT | Freeze Warning | PBZ | 18 hr |
| Jun 5, 2:38 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 5, 4:24 PM EDT | Severe Thunderstorm Warning | PBZ | 51 min |
| Jun 5, 4:33 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Jun 6, 11:41 AM EDT | Mesoscale Discussion | SPC | 64 min |
| Jun 6, 3:11 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 6, 10:09 PM EDT | Severe Thunderstorm Warning | PBZ | 36 min |
| Jun 16, 8:53 AM EDT | Special Weather Statement | PBZ | 67 min |
| Jun 16, 1:58 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 16, 3:55 PM EDT | Flash Flood Watch | PBZ | 11 hr |
| Jun 16, 9:07 PM EDT | Areal Flood Warning | PBZ | 3 hr |
| Jul 13, 11:36 PM EDT | Special Weather Statement | PBZ | 39 min |
| Jul 22, 9:18 AM EDT | Areal Flood Advisory | PBZ | 3 hr |
| Jul 22, 9:33 AM EDT | Severe Thunderstorm Warning | PBZ | 28 min |
| Jul 24, 3:14 PM EDT | Severe Thunderstorm Warning | PBZ | 46 min |
| Jul 31, 4:28 PM EDT | Special Weather Statement | PBZ | 47 min |
| Aug 10, 4:28 PM EDT | Special Weather Statement | PBZ | 47 min |
| Aug 10, 5:04 PM EDT | Special Weather Statement | PBZ | 41 min |
| Aug 11, 2:25 PM EDT | Special Weather Statement | PBZ | 35 min |
| Aug 11, 3:32 PM EDT | Special Weather Statement | PBZ | 28 min |
| Aug 11, 5:29 PM EDT | Special Weather Statement | PBZ | 46 min |
| Aug 12, 10:35 PM EDT | Special Weather Statement | PBZ | 40 min |
| Aug 16, 2:57 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 19, 7:28 PM EDT | Areal Flood Advisory | PBZ | 62 min |
| Aug 19, 7:59 PM EDT | Special Weather Statement | PBZ | 46 min |
| Aug 25, 5:42 PM EDT | Mesoscale Discussion | SPC | 93 min |
| Sep 8, 4:23 PM EDT | Special Weather Statement | PBZ | 37 min |
| Sep 8, 5:15 PM EDT | Special Weather Statement | PBZ | 30 min |
| Sep 8, 5:48 PM EDT | Severe Thunderstorm Warning | PBZ | 42 min |
| Sep 10, 1:16 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 10, 3:30 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Sep 10, 4:38 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 10, 7:26 PM EDT | Special Weather Statement | PBZ | 49 min |
| Sep 10, 7:31 PM EDT | Severe Thunderstorm Warning | PBZ | 44 min |
| Sep 10, 7:51 PM EDT | Severe Thunderstorm Warning | PBZ | 39 min |
| Sep 10, 8:06 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Sep 17, 4:08 PM EDT | Special Weather Statement | PBZ | 37 min |
| Sep 17, 4:23 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 17, 5:46 PM EDT | Special Weather Statement | PBZ | 29 min |
| Sep 17, 5:49 PM EDT | Severe Thunderstorm Warning | PBZ | 26 min |
| Sep 17, 6:01 PM EDT | Tornado Warning | PBZ | 29 min |
| Sep 17, 7:17 PM EDT | Severe Thunderstorm Warning | PBZ | 28 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, 6:23 AM EDT | Flash Flood Warning | PBZ | 4 hr |
| Oct 20, 11:45 AM EDT | Flash Flood Watch | PBZ | 21 hr |
| Oct 30, 11:44 AM EDT | Special Weather Statement | PBZ | 31 min |
| Nov 17, 3:18 AM EST | Dense Fog Advisory | PBZ | 7 hr |
| Nov 18, 3:01 PM EST | Lake Effect Snow Advisory | PBZ | 61 hr |
| Dec 9, 1:38 PM EST | Lake Effect Snow Advisory | PBZ | 13 hr |
| Dec 9, 7:13 PM EST | Special Weather Statement | PBZ | 47 min |
| Dec 10, 1:37 PM EST | Winter Weather Advisory | PBZ | 39 hr |
| Dec 11, 10:05 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Dec 14, 10:28 AM EST | Wind Chill Advisory | PBZ | 47 hr |
| Dec 14, 2:49 PM EST | Winter Weather Advisory | PBZ | 23 hr |
| Dec 15, 8:59 AM EST | Special Weather Statement | PBZ | 61 min |
| 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 17, 3:08 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Dec 18, 4:26 AM EST | Special Weather Statement | PBZ | 3 hr |
| Dec 18, 6:23 AM EST | Winter Weather Advisory | PBZ | 6 hr |
| Dec 29, 3:55 AM EST | Lake Effect Snow Advisory | PBZ | 39 hr |
| Dec 29, 8:47 PM EST | Special Weather Statement | PBZ | 118 min |
| Dec 30, 9:33 AM EST | Lake Effect Snow Warning | PBZ | 9 hr |
| Dec 30, 11:33 AM EST | Special Weather Statement | PBZ | 87 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 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.