Alert archive / Pennsylvania / Mercer County
Weather alerts in Mercer County, Pennsylvania, 2008
105 weather alerts in 2008, 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 2008. Tap one for its archive.
- Alerts
- 105
- Warnings
- 25
- Watches
- 17
- Advisories
- 33
- Busiest month
- June27 alerts
- Busiest day
- June 16, 20085 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, 2008
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 14 | 8 | 43% | 15 | 73% | 22 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2008
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Pittsburgh, PA: tornado warnings | 8 | 2 | 75% | 5 | 40% | 11 min |
| NWS Pittsburgh, PA: severe thunderstorm warnings | 179 | 102 | 43% | 169 | 83% | 23 min |
| NWS Pittsburgh, PA: flash flood warnings | 23 | 10 | 57% | 18 | 83% | 65 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, 9:44 PM EST | Winter Storm Warning | PBZ | 39 hr |
| Jan 8, 2:47 PM EST | Wind Advisory | PBZ | 16 hr |
| Jan 29, 3:02 AM EST | Wind Advisory | PBZ | 12 hr |
| Jan 29, 2:47 PM EST | High Wind Warning | PBZ | 18 hr |
| Jan 31, 3:21 PM EST | Winter Storm Warning | PBZ | 26 hr |
| Feb 1, 1:43 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Feb 1, 7:36 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Feb 3, 10:47 PM EST | Winter Weather Advisory | PBZ | 5 hr |
| Feb 5, 3:24 AM EST | Flood Watch | PBZ | 37 hr |
| Feb 9, 3:59 AM EST | Wind Advisory | PBZ | 40 hr |
| Feb 9, 3:35 PM EST | Wind Chill Advisory | PBZ | 41 hr |
| Feb 11, 4:07 AM EST | Winter Storm Watch | PBZ | 10 hr |
| Feb 11, 8:59 AM EST | Wind Chill Advisory | PBZ | 3 hr |
| Feb 11, 2:12 PM EST | Winter Storm Warning | PBZ | 37 hr |
| Feb 12, 1:06 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 12, 7:41 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 21, 3:15 AM EST | Winter Weather Advisory | PBZ | 40 hr |
| Feb 25, 2:37 PM EST | Winter Weather Advisory | PBZ | 37 hr |
| Feb 29, 6:52 PM EST | Winter Weather Advisory | PBZ | 8 hr |
| Mar 3, 3:34 AM EST | Flood Watch | PBZ | 45 hr |
| Mar 3, 3:35 AM EST | Winter Storm Watch | PBZ | 12 hr |
| Mar 3, 3:57 PM EST | Freezing Rain Advisory | PBZ | 27 hr |
| Mar 4, 9:08 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Mar 6, 3:34 PM EST | Winter Storm Watch | PBZ | 12 hr |
| Mar 7, 3:36 AM EST | Winter Storm Warning | PBZ | 39 hr |
| Mar 7, 10:05 PM EST | Mesoscale Discussion | SPC | 5 hr |
| Mar 8, 6:16 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Mar 15, 4:03 AM EDT | Dense Fog Advisory | PBZ | 5 hr |
| Mar 18, 3:54 AM EDT | Flood Watch | PBZ | 42 hr |
| Mar 19, 9:57 AM EDT | Areal Flood Warning | PBZ | 4 hr |
| Mar 21, 3:13 AM EDT | Snow Advisory | PBZ | 30 hr |
| May 28, 5:21 PM EDT | Frost Advisory | PBZ | 13 hr |
| May 31, 2:56 AM EDT | Mesoscale Discussion | SPC | 94 min |
| Jun 5, 7:23 AM EDT | Areal Flood Advisory | PBZ | 109 min |
| Jun 5, 2:34 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Jun 5, 2:55 PM EDT | Severe Thunderstorm Warning | PBZ | 50 min |
| Jun 8, 8:32 PM EDT | Severe Thunderstorm Warning | PBZ | 43 min |
| Jun 10, 1:25 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Jun 13, 8:16 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Jun 13, 9:23 PM EDT | Severe Thunderstorm Warning | PBZ | 67 min |
| Jun 15, 9:08 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Jun 16, 10:19 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 16, 11:28 AM EDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Jun 16, 2:41 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Jun 16, 3:08 PM EDT | Severe Thunderstorm Warning | PBZ | 37 min |
| Jun 21, 4:36 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 21, 7:04 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Jun 21, 7:12 PM EDT | Severe Thunderstorm Warning | PBZ | 78 min |
| Jun 22, 2:24 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 22, 5:25 PM EDT | Severe Thunderstorm Warning | PBZ | 65 min |
| Jun 23, 2:55 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Jun 26, 5:45 PM EDT | Severe Thunderstorm Warning | PBZ | 60 min |
| Jun 28, 10:39 AM EDT | Mesoscale Discussion | SPC | 66 min |
| Jun 28, 12:59 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 28, 3:52 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Jun 28, 6:47 PM EDT | Mesoscale Discussion | SPC | 58 min |
| Jun 29, 10:46 AM EDT | Mesoscale Discussion | SPC | 119 min |
| Jun 29, 12:11 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 29, 1:07 PM EDT | Severe Thunderstorm Warning | PBZ | 53 min |
| Jun 29, 4:14 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Jul 8, 5:56 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Jul 8, 6:04 PM EDT | Severe Thunderstorm Watch | SPC | 2 hr |
| Jul 8, 6:06 PM EDT | Severe Thunderstorm Warning | PBZ | 54 min |
| Jul 8, 6:58 PM EDT | Severe Thunderstorm Warning | PBZ | 62 min |
| Jul 8, 8:19 PM EDT | Mesoscale Discussion | SPC | 56 min |
| Jul 20, 11:29 AM EDT | Mesoscale Discussion | SPC | 61 min |
| Jul 20, 12:35 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 21, 10:28 AM EDT | Mesoscale Discussion | SPC | 62 min |
| Jul 21, 6:33 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Jul 22, 3:39 PM EDT | Severe Thunderstorm Warning | PBZ | 66 min |
| Jul 26, 10:16 AM EDT | Mesoscale Discussion | SPC | 119 min |
| Jul 26, 4:27 PM EDT | Severe Thunderstorm Warning | PBZ | 63 min |
| Jul 26, 4:53 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Jul 26, 8:29 PM EDT | Areal Flood Advisory | PBZ | 3 hr |
| Jul 26, 8:34 PM EDT | Areal Flood Advisory | PBZ | 3 hr |
| Jul 26, 10:29 PM EDT | Severe Thunderstorm Warning | PBZ | 46 min |
| Aug 1, 10:56 PM EDT | Mesoscale Discussion | SPC | 94 min |
| Aug 7, 7:26 PM EDT | Severe Thunderstorm Warning | PBZ | 64 min |
| Aug 14, 4:57 PM EDT | Areal Flood Advisory | PBZ | 3 hr |
| Sep 14, 3:46 PM EDT | Wind Advisory | PBZ | 11 hr |
| Sep 14, 8:02 PM EDT | High Wind Warning | PBZ | 4 hr |
| Oct 4, 9:37 PM EDT | Frost Advisory | PBZ | 10 hr |
| Oct 6, 7:25 AM EDT | Frost Advisory | PBZ | 26 hr |
| Oct 18, 3:06 AM EDT | Frost Advisory | PBZ | 12 hr |
| Oct 18, 3:06 AM EDT | Freeze Warning | PBZ | 30 hr |
| Oct 29, 3:28 AM EDT | Lake Effect Snow Advisory | PBZ | 17 hr |
| Nov 17, 4:05 AM EST | Lake Effect Snow Advisory | PBZ | 34 hr |
| Nov 19, 4:00 PM EST | Lake Effect Snow Watch | PBZ | 11 hr |
| Nov 20, 2:54 AM EST | Lake Effect Snow Warning | PBZ | 37 hr |
| Nov 21, 3:25 PM EST | Lake Effect Snow Advisory | PBZ | 24 hr |
| Nov 25, 3:01 AM EST | Winter Weather Advisory | PBZ | 24 hr |
| Dec 6, 3:39 AM EST | Lake Effect Snow Watch | PBZ | 12 hr |
| Dec 6, 3:30 PM EST | Lake Effect Snow Warning | PBZ | 26 hr |
| Dec 12, 11:12 AM EST | Lake Effect Snow Advisory | PBZ | 15 hr |
| Dec 15, 3:40 AM EST | Winter Storm Watch | PBZ | 24 hr |
| Dec 16, 3:57 AM EST | Winter Weather Advisory | PBZ | 26 hr |
| Dec 18, 3:08 AM EST | Winter Storm Watch | PBZ | 12 hr |
| Dec 18, 2:43 PM EST | Winter Storm Warning | PBZ | 24 hr |
| Dec 19, 7:22 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Dec 20, 3:11 PM EST | Winter Weather Advisory | PBZ | 18 hr |
| Dec 21, 2:32 PM EST | Wind Chill Advisory | PBZ | 21 hr |
| Dec 23, 4:21 AM EST | Winter Weather Advisory | PBZ | 32 hr |
| Dec 27, 8:07 PM EST | Wind Advisory | PBZ | 19 hr |
| Dec 29, 7:49 PM EST | Wind Advisory | PBZ | 7 hr |
| Dec 30, 3:14 PM EST | Winter Weather Advisory | PBZ | 24 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 archive20072009
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.