Alert archive / Pennsylvania / Warren County
Weather alerts in Warren County, Pennsylvania, 2009
139 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Warren County and its neighbors
Each county as a circle sized by its count in 2009. Tap one for its archive.
- Alerts
- 139
- Warnings
- 29
- Watches
- 19
- Advisories
- 45
- Busiest month
- August33 alerts
- Busiest day
- August 10, 200912 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Warren County, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 9 | 4 | 56% | 5 | 80% | 24 min |
| Flash flood warnings | 6 | 5 | 17% | 6 | 100% | 50 min |
Each office's whole area, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS State College, PA: tornado warnings | 13 | 3 | 77% | 5 | 80% | 22 min |
| NWS State College, PA: severe thunderstorm warnings | 166 | 86 | 48% | 182 | 80% | 26 min |
| NWS State College, PA: flash flood warnings | 38 | 23 | 39% | 43 | 93% | 64 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 5, 10:11 PM EST | Winter Weather Advisory | CTP | 72 hr |
| Jan 7, 12:10 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Jan 8, 8:31 AM EST | Lake Effect Snow Warning | CTP | 25 hr |
| Jan 8, 3:30 PM EST | Winter Storm Watch | CTP | 23 hr |
| Jan 9, 2:32 PM EST | Winter Storm Warning | CTP | 30 hr |
| Jan 9, 2:32 PM EST | Winter Weather Advisory | CTP | 37 hr |
| Jan 10, 6:33 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Jan 14, 4:25 AM EST | Lake Effect Snow Watch | CTP | 23 hr |
| Jan 15, 3:30 AM EST | Lake Effect Snow Warning | CTP | 21 hr |
| Jan 15, 3:30 AM EST | Wind Chill Warning | CTP | 32 hr |
| Jan 15, 3:30 AM EST | Wind Chill Advisory | CTP | 56 hr |
| Jan 17, 2:44 PM EST | Winter Weather Advisory | CTP | 31 hr |
| Jan 26, 3:30 AM EST | Winter Storm Watch | CTP | 32 hr |
| Jan 27, 11:40 AM EST | Winter Storm Warning | CTP | 31 hr |
| Jan 28, 12:31 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Feb 10, 3:31 PM EST | High Wind Watch | CTP | 24 hr |
| Feb 11, 3:09 PM EST | High Wind Warning | CTP | 28 hr |
| Feb 11, 3:09 PM EST | Wind Advisory | CTP | 32 hr |
| Feb 11, 5:53 PM EST | Severe Thunderstorm Watch | SPC | 4 hr |
| Feb 11, 8:00 PM EST | Mesoscale Discussion | SPC | 60 min |
| Feb 17, 2:45 PM EST | Winter Weather Advisory | CTP | 34 hr |
| Feb 19, 4:22 AM EST | Winter Weather Advisory | CTP | 31 hr |
| Feb 22, 3:28 AM EST | Lake Effect Snow Advisory | CTP | 35 hr |
| Mar 2, 2:38 PM EST | Wind Chill Advisory | CTP | 18 hr |
| Mar 8, 3:29 PM EDT | Wind Advisory | CTP | 24 hr |
| Mar 9, 6:36 AM EDT | Areal Flood Advisory | CTP | 3 hr |
| Mar 10, 4:07 AM EDT | Flood Watch | CTP | 23 hr |
| Mar 10, 3:48 PM EDT | Wind Advisory | CTP | 28 hr |
| Mar 10, 8:00 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Mar 10, 10:51 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Mar 25, 7:08 AM EDT | Red Flag Warning | CTP | 9 hr |
| Mar 27, 3:55 AM EDT | Dense Fog Advisory | CTP | 6 hr |
| Apr 3, 3:04 AM EDT | High Wind Watch | CTP | 9 hr |
| Apr 3, 11:47 AM EDT | Wind Advisory | CTP | 28 hr |
| Apr 6, 2:56 PM EDT | Lake Effect Snow Advisory | CTP | 39 hr |
| Apr 24, 6:51 PM EDT | Mesoscale Discussion | SPC | 54 min |
| Apr 25, 1:24 PM EDT | Mesoscale Discussion | SPC | 66 min |
| May 1, 5:11 PM EDT | Special Weather Statement | CTP | 34 min |
| May 9, 3:38 AM EDT | Wind Advisory | CTP | 23 hr |
| May 16, 12:05 PM EDT | Mesoscale Discussion | SPC | 55 min |
| May 16, 1:00 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 16, 9:50 PM EDT | Freeze Watch | CTP | 6 hr |
| May 17, 3:20 AM EDT | Freeze Warning | CTP | 30 hr |
| May 18, 3:28 PM EDT | Freeze Warning | CTP | 17 hr |
| May 28, 2:58 PM EDT | Special Weather Statement | CTP | 2 hr |
| May 28, 4:09 PM EDT | Severe Thunderstorm Warning | CTP | 81 min |
| May 28, 4:54 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| May 28, 4:54 PM EDT | Mesoscale Discussion | SPC | 66 min |
| May 28, 5:16 PM EDT | Severe Thunderstorm Warning | CTP | 59 min |
| May 28, 6:03 PM EDT | Flash Flood Warning | CTP | 3 hr |
| May 30, 3:37 PM EDT | Freeze Watch | CTP | 14 hr |
| May 31, 5:50 AM EDT | Frost Advisory | CTP | 26 hr |
| Jun 11, 5:38 PM EDT | Areal Flood Advisory | CTP | 112 min |
| Jun 20, 2:52 AM EDT | Special Weather Statement | CTP | 113 min |
| Jun 20, 9:39 AM EDT | Areal Flood Advisory | CTP | 3 hr |
| Jun 20, 5:47 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Jun 25, 3:51 PM EDT | Mesoscale Discussion | SPC | 54 min |
| Jun 25, 4:08 PM EDT | Special Weather Statement | CTP | 37 min |
| Jul 11, 10:31 AM EDT | Mesoscale Discussion | SPC | 59 min |
| Jul 11, 12:23 PM EDT | Special Weather Statement | CTP | 82 min |
| Jul 11, 12:46 PM EDT | Special Weather Statement | CTP | 74 min |
| Jul 11, 12:57 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Jul 11, 5:38 PM EDT | Special Weather Statement | CTP | 37 min |
| Jul 11, 5:46 PM EDT | Severe Thunderstorm Warning | CTP | 59 min |
| Jul 11, 7:06 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Jul 11, 8:44 PM EDT | Special Weather Statement | CTP | 46 min |
| Jul 11, 10:03 PM EDT | Special Weather Statement | CTP | 27 min |
| Jul 11, 10:34 PM EDT | Special Weather Statement | CTP | 56 min |
| Jul 21, 8:56 AM EDT | Areal Flood Advisory | CTP | 3 hr |
| Jul 21, 10:44 AM EDT | Flash Flood Watch | CTP | 15 hr |
| Jul 21, 12:16 PM EDT | Flash Flood Warning | CTP | 6 hr |
| Jul 21, 1:56 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Jul 23, 5:08 AM EDT | Areal Flood Advisory | CTP | 5 hr |
| Jul 26, 12:56 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 26, 7:02 PM EDT | Special Weather Statement | CTP | 28 min |
| Jul 26, 9:22 PM EDT | Special Weather Statement | CTP | 53 min |
| Aug 1, 4:05 AM EDT | Dense Fog Advisory | CTP | 5 hr |
| Aug 4, 6:09 PM EDT | Mesoscale Discussion | SPC | 66 min |
| Aug 9, 11:36 AM EDT | Mesoscale Discussion | SPC | 24 min |
| Aug 9, 11:57 AM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 9, 2:26 PM EDT | Severe Thunderstorm Warning | CTP | 79 min |
| Aug 9, 2:45 PM EDT | Mesoscale Discussion | SPC | 60 min |
| Aug 9, 7:11 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 9, 10:44 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Aug 9, 10:47 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Aug 9, 11:24 PM EDT | Special Weather Statement | CTP | 51 min |
| Aug 10, 12:09 AM EDT | Severe Thunderstorm Warning | CTP | 81 min |
| Aug 10, 12:52 AM EDT | Areal Flood Advisory | CTP | 3 hr |
| Aug 10, 6:55 AM EDT | Special Weather Statement | CTP | 35 min |
| Aug 10, 7:50 AM EDT | Flash Flood Warning | CTP | 4 hr |
| Aug 10, 11:43 AM EDT | Flash Flood Warning | CTP | 3 hr |
| Aug 10, 2:26 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 10, 3:12 PM EDT | Flash Flood Warning | CTP | 3 hr |
| Aug 10, 3:13 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 10, 3:19 PM EDT | Special Weather Statement | CTP | 26 min |
| Aug 11, 12:39 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 11, 12:42 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Aug 11, 3:08 PM EDT | Flash Flood Warning | CTP | 3 hr |
| Aug 11, 3:10 PM EDT | Special Weather Statement | CTP | 35 min |
| Aug 12, 6:20 PM EDT | Areal Flood Advisory | CTP | 115 min |
| Aug 13, 4:15 AM EDT | Dense Fog Advisory | CTP | 5 hr |
| Aug 14, 4:04 AM EDT | Dense Fog Advisory | CTP | 6 hr |
| Aug 18, 2:32 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Aug 18, 3:52 PM EDT | Severe Thunderstorm Warning | CTP | 53 min |
| Aug 18, 6:30 PM EDT | Special Weather Statement | CTP | 75 min |
| Aug 20, 6:20 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Aug 20, 6:54 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 20, 8:18 PM EDT | Severe Thunderstorm Warning | CTP | 57 min |
| Aug 20, 9:27 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Sep 27, 2:18 PM EDT | Wind Advisory | CTP | 29 hr |
| Sep 30, 2:11 PM EDT | Frost Advisory | CTP | 14 hr |
| Oct 6, 2:59 PM EDT | Wind Advisory | CTP | 29 hr |
| Oct 7, 2:24 AM EDT | Special Weather Statement | CTP | 66 min |
| Oct 7, 12:16 PM EDT | High Wind Warning | CTP | 5 hr |
| Oct 10, 3:49 AM EDT | Frost Advisory | CTP | 29 hr |
| Oct 10, 2:45 PM EDT | Freeze Watch | CTP | 24 hr |
| Oct 11, 2:51 PM EDT | Freeze Warning | CTP | 17 hr |
| Oct 14, 3:35 PM EDT | Winter Storm Watch | CTP | 13 hr |
| Oct 15, 4:26 AM EDT | Winter Storm Warning | CTP | 34 hr |
| Nov 5, 7:28 PM EST | Special Weather Statement | CTP | 107 min |
| Dec 7, 2:41 PM EST | Winter Storm Watch | CTP | 21 hr |
| Dec 8, 6:12 AM EST | Winter Weather Advisory | CTP | 26 hr |
| Dec 8, 1:57 PM EST | High Wind Watch | CTP | 14 hr |
| Dec 8, 11:32 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Dec 9, 3:38 AM EST | Wind Advisory | CTP | 26 hr |
| Dec 9, 11:02 AM EST | Mesoscale Discussion | SPC | 88 min |
| Dec 9, 1:04 PM EST | Severe Thunderstorm Warning | CTP | 56 min |
| Dec 9, 1:31 PM EST | Severe Thunderstorm Warning | CTP | 59 min |
| Dec 10, 9:49 PM EST | Wind Chill Advisory | CTP | 10 hr |
| Dec 11, 4:04 AM EST | Lake Effect Snow Warning | CTP | 18 hr |
| Dec 11, 9:27 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Dec 12, 3:17 PM EST | Freezing Rain Advisory | CTP | 25 hr |
| Dec 13, 5:16 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Dec 24, 2:05 PM EST | Winter Weather Advisory | CTP | 29 hr |
| Dec 25, 7:50 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Dec 27, 3:58 PM EST | Winter Weather Advisory | CTP | 14 hr |
| Dec 28, 5:31 AM EST | Lake Effect Snow Advisory | CTP | 17 hr |
| Dec 28, 2:33 PM EST | Wind Advisory | CTP | 28 hr |
| Dec 28, 10:59 PM EST | Lake Effect Snow Warning | CTP | 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 archive20082010
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.