Alert archive / Pennsylvania / Potter County
Weather alerts in Potter County, Pennsylvania, 2015
109 weather alerts in 2015, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Potter County and its neighbors
Each county as a circle sized by its count in 2015. Tap one for its archive.
- Alerts
- 109
- Warnings
- 20
- Watches
- 18
- Advisories
- 28
- Busiest month
- February21 alerts
- Busiest day
- February 18, 20155 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Potter County, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 11 | 8 | 27% | 14 | 79% | 37 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS State College, PA: tornado warnings | 12 | 1 | 92% | 7 | 14% | 11 min |
| NWS State College, PA: severe thunderstorm warnings | 174 | 111 | 36% | 302 | 78% | 27 min |
| NWS State College, PA: flash flood warnings | 17 | 9 | 47% | 15 | 93% | 47 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 2, 3:04 PM EST | Winter Weather Advisory | CTP | 29 hr |
| Jan 3, 9:59 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Jan 4, 12:08 PM EST | Special Weather Statement | CTP | 52 min |
| Jan 6, 3:28 PM EST | Wind Chill Advisory | CTP | 46 hr |
| Jan 7, 9:42 AM EST | Special Weather Statement | CTP | 63 min |
| Jan 9, 4:23 AM EST | Wind Chill Advisory | CTP | 32 hr |
| Jan 11, 4:49 AM EST | Winter Weather Advisory | CTP | 38 hr |
| Jan 18, 6:48 PM EST | Special Weather Statement | CTP | 3 hr |
| Jan 24, 5:35 PM EST | Freezing Rain Advisory | CTP | 11 hr |
| Jan 25, 5:15 AM EST | Winter Weather Advisory | CTP | 50 hr |
| Jan 28, 2:38 PM EST | Winter Weather Advisory | CTP | 40 hr |
| Jan 30, 3:19 AM EST | Wind Chill Advisory | CTP | 29 hr |
| Jan 30, 3:42 PM EST | Winter Storm Watch | CTP | 23 hr |
| Jan 31, 2:57 PM EST | Winter Storm Warning | CTP | 43 hr |
| Feb 1, 9:52 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 2, 2:48 PM EST | Wind Chill Advisory | CTP | 17 hr |
| Feb 5, 3:50 AM EST | Wind Chill Advisory | CTP | 29 hr |
| Feb 8, 4:23 AM EST | Winter Weather Advisory | CTP | 34 hr |
| Feb 11, 4:02 AM EST | Wind Chill Watch | CTP | 23 hr |
| Feb 12, 3:10 AM EST | Wind Chill Warning | CTP | 32 hr |
| Feb 13, 3:22 AM EST | Wind Chill Watch | CTP | 24 hr |
| Feb 13, 2:16 PM EST | Winter Weather Advisory | CTP | 41 hr |
| Feb 14, 3:42 AM EST | Wind Chill Warning | CTP | 54 hr |
| Feb 14, 2:07 PM EST | Special Weather Statement | CTP | 53 min |
| Feb 14, 3:28 PM EST | Special Weather Statement | CTP | 62 min |
| Feb 18, 4:05 AM EST | Wind Chill Warning | CTP | 56 hr |
| Feb 18, 3:39 PM EST | Special Weather Statement | CTP | 21 min |
| Feb 18, 4:05 PM EST | Special Weather Statement | CTP | 25 min |
| Feb 18, 4:35 PM EST | Special Weather Statement | CTP | 70 min |
| Feb 18, 5:44 PM EST | Special Weather Statement | CTP | 31 min |
| Feb 20, 3:10 PM EST | Winter Weather Advisory | CTP | 39 hr |
| Feb 22, 3:13 AM EST | Wind Chill Watch | CTP | 10 hr |
| Feb 22, 3:13 AM EST | Wind Chill Advisory | CTP | 54 hr |
| Feb 23, 3:39 AM EST | Wind Chill Warning | CTP | 29 hr |
| Feb 28, 12:14 PM EST | Winter Weather Advisory | CTP | 43 hr |
| Mar 2, 1:54 PM EST | Winter Weather Advisory | CTP | 41 hr |
| Mar 3, 2:30 PM EST | Winter Storm Warning | CTP | 7 hr |
| Mar 10, 5:30 PM EDT | Dense Fog Advisory | CTP | 16 hr |
| Mar 10, 9:55 PM EDT | Special Weather Statement | CTP | 3 hr |
| Mar 13, 2:41 AM EDT | Flood Watch | CTP | 41 hr |
| Mar 19, 4:09 AM EDT | Winter Weather Advisory | CTP | 38 hr |
| Mar 26, 4:07 AM EDT | Special Weather Statement | CTP | 3 hr |
| Mar 30, 4:00 PM EDT | Special Weather Statement | CTP | 3 hr |
| Mar 30, 7:45 PM EDT | Special Weather Statement | CTP | 9 hr |
| Mar 31, 3:11 AM EDT | Winter Weather Advisory | CTP | 17 hr |
| Apr 17, 2:39 PM EDT | Fire Weather Watch | CTP | 12 hr |
| Apr 18, 2:54 AM EDT | Red Flag Warning | CTP | 17 hr |
| Apr 20, 3:08 PM EDT | Tornado Watch | SPC | 9 hr |
| Apr 20, 3:23 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 20, 5:57 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 20, 7:19 PM EDT | Special Weather Statement | CTP | 41 min |
| Apr 20, 7:42 PM EDT | Severe Thunderstorm Warning | CTP | 42 min |
| May 11, 1:32 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 11, 8:18 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| May 11, 10:53 PM EDT | Special Weather Statement | CTP | 52 min |
| May 11, 10:59 PM EDT | Severe Thunderstorm Warning | CTP | 61 min |
| May 16, 1:35 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 18, 7:49 PM EDT | Special Weather Statement | CTP | 56 min |
| May 21, 3:42 AM EDT | Freeze Watch | CTP | 23 hr |
| May 22, 2:18 AM EDT | Freeze Warning | CTP | 30 hr |
| Jun 3, 5:46 AM EDT | Dense Fog Advisory | CTP | 2 hr |
| Jun 8, 2:35 PM EDT | Severe Thunderstorm Warning | CTP | 70 min |
| Jun 12, 2:54 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 12, 5:36 PM EDT | Severe Thunderstorm Warning | CTP | 69 min |
| Jun 12, 6:40 PM EDT | Severe Thunderstorm Warning | CTP | 80 min |
| Jun 12, 6:53 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Jun 14, 2:51 PM EDT | Flash Flood Watch | CTP | 14 hr |
| Jun 15, 2:36 PM EDT | Flash Flood Watch | CTP | 18 hr |
| Jun 23, 4:24 AM EDT | Mesoscale Discussion | SPC | 66 min |
| Jun 23, 5:30 AM EDT | Mesoscale Discussion | SPC | 60 min |
| Jun 23, 5:50 AM EDT | Severe Thunderstorm Warning | CTP | 55 min |
| Jun 23, 6:08 AM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 23, 6:36 AM EDT | Severe Thunderstorm Warning | CTP | 54 min |
| Jun 26, 3:55 AM EDT | Flood Watch | CTP | 44 hr |
| Jun 30, 1:21 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 30, 5:37 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Jun 30, 7:38 PM EDT | Mesoscale Discussion | SPC | 67 min |
| Jul 7, 4:31 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 7, 5:41 PM EDT | Severe Thunderstorm Warning | CTP | 34 min |
| Jul 9, 4:50 AM EDT | Flash Flood Watch | CTP | 12 hr |
| Jul 9, 2:46 PM EDT | Special Weather Statement | CTP | 29 min |
| Jul 14, 3:58 PM EDT | Mesoscale Discussion | SPC | 62 min |
| Jul 14, 4:27 PM EDT | Special Weather Statement | CTP | 33 min |
| Jul 14, 5:30 PM EDT | Severe Thunderstorm Warning | CTP | 90 min |
| Jul 19, 2:11 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 19, 3:18 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 19, 8:09 PM EDT | Severe Thunderstorm Warning | CTP | 34 min |
| Jul 19, 8:30 PM EDT | Severe Thunderstorm Warning | CTP | 60 min |
| Jul 19, 8:32 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Jul 20, 12:43 AM EDT | Special Weather Statement | CTP | 47 min |
| Jul 20, 1:21 AM EDT | Special Weather Statement | CTP | 39 min |
| Jul 26, 3:34 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Aug 10, 11:28 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Aug 15, 3:08 PM EDT | Special Weather Statement | CTP | 52 min |
| Aug 15, 4:46 PM EDT | Special Weather Statement | CTP | 29 min |
| Aug 20, 11:49 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 1, 8:51 AM EDT | Special Weather Statement | CTP | 114 min |
| Sep 4, 8:48 AM EDT | Special Weather Statement | CTP | 117 min |
| Sep 6, 6:48 AM EDT | Special Weather Statement | CTP | 3 hr |
| Sep 29, 4:19 AM EDT | Flash Flood Watch | CTP | 24 hr |
| Sep 29, 6:50 PM EDT | Areal Flood Advisory | CTP | 6 hr |
| Sep 29, 8:29 PM EDT | Areal Flood Warning | CTP | 6 hr |
| Nov 11, 2:44 PM EST | Wind Advisory | CTP | 31 hr |
| Nov 12, 2:13 PM EST | Special Weather Statement | CTP | 92 min |
| Dec 10, 5:35 AM EST | Dense Fog Advisory | CTP | 4 hr |
| Dec 10, 10:03 AM EST | Dense Fog Advisory | CTP | 117 min |
| Dec 24, 1:52 AM EST | Special Weather Statement | CTP | 38 min |
| Dec 27, 8:01 AM EST | Areal Flood Advisory | CTP | 3 hr |
| Dec 28, 3:44 AM EST | Winter Weather Advisory | CTP | 30 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 archive20142016
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.