Alert archive / Pennsylvania / Potter County
Weather alerts in Potter County, Pennsylvania, 2017
113 weather alerts in 2017, 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 2017. Tap one for its archive.
- Alerts
- 113
- Warnings
- 21
- Watches
- 13
- Advisories
- 33
- Busiest month
- May20 alerts
- Busiest day
- August 22, 201710 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 2 tornado warnings covering Potter County in 2017 had a tornado report inside them.
Potter County, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 2 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 15 | 8 | 47% | 3 | 100% | 45 min |
| Flash flood warnings | 1 | 1 | 0% | 0 |
Each office's whole area, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS State College, PA: tornado warnings | 16 | 4 | 75% | 10 | 40% | 19 min |
| NWS State College, PA: severe thunderstorm warnings | 190 | 121 | 36% | 342 | 88% | 32 min |
| NWS State College, PA: flash flood warnings | 20 | 15 | 25% | 45 | 84% | 81 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, 3:06 PM EST | Freezing Rain Advisory | CTP | 22 hr |
| Jan 9, 2:41 PM EST | Winter Weather Advisory | CTP | 37 hr |
| Jan 10, 6:13 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Jan 10, 7:10 PM EST | Special Weather Statement | CTP | 35 min |
| Jan 12, 4:57 AM EST | Flood Watch | CTP | 15 hr |
| Jan 12, 2:26 PM EST | Special Weather Statement | CTP | 49 min |
| Jan 16, 3:54 AM EST | Freezing Rain Advisory | CTP | 30 hr |
| Jan 17, 8:08 PM EST | Dense Fog Advisory | CTP | 8 hr |
| Jan 20, 11:05 PM EST | Dense Fog Advisory | CTP | 14 hr |
| Jan 21, 4:52 PM EST | Dense Fog Advisory | CTP | 20 hr |
| Jan 22, 1:58 PM EST | Winter Storm Watch | CTP | 323 days |
| Jan 23, 4:11 AM EST | Winter Storm Warning | CTP | 30 hr |
| Jan 30, 1:58 PM EST | Winter Weather Advisory | CTP | 34 hr |
| Feb 1, 11:29 AM EST | Special Weather Statement | CTP | 31 min |
| Feb 8, 4:13 AM EST | Winter Weather Advisory | CTP | 30 hr |
| Feb 12, 4:00 AM EST | Freezing Rain Advisory | CTP | 13 hr |
| Feb 12, 4:22 AM EST | Wind Advisory | CTP | 37 hr |
| Feb 15, 12:54 PM EST | Special Weather Statement | CTP | 3 hr |
| Feb 15, 1:07 PM EST | Special Weather Statement | CTP | 3 hr |
| Feb 25, 9:26 AM EST | Special Weather Statement | CTP | 34 min |
| Mar 1, 3:43 PM EST | Wind Advisory | CTP | 17 hr |
| Mar 3, 11:00 AM EST | Special Weather Statement | CTP | 60 min |
| Mar 3, 11:53 AM EST | Special Weather Statement | CTP | 67 min |
| Mar 7, 1:22 PM EST | Wind Advisory | CTP | 36 hr |
| Mar 11, 8:54 PM EST | Winter Storm Watch | CTP | 18 hr |
| Mar 12, 3:24 PM EDT | Winter Storm Warning | CTP | 48 hr |
| Mar 14, 2:56 PM EDT | Winter Weather Advisory | CTP | 41 hr |
| Mar 17, 3:40 PM EDT | Winter Weather Advisory | CTP | 19 hr |
| Mar 23, 2:18 PM EDT | Winter Weather Advisory | CTP | 21 hr |
| Mar 31, 3:03 AM EDT | Areal Flood Advisory | CTP | 3 hr |
| Apr 16, 2:15 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Apr 16, 3:56 PM EDT | Special Weather Statement | CTP | 34 min |
| Apr 20, 10:13 PM EDT | Severe Thunderstorm Warning | CTP | 62 min |
| Apr 20, 10:28 PM EDT | Special Weather Statement | CTP | 32 min |
| Apr 30, 7:10 PM EDT | Severe Thunderstorm Warning | CTP | 65 min |
| May 1, 1:41 PM EDT | Mesoscale Discussion | SPC | 64 min |
| May 1, 2:12 PM EDT | Tornado Watch | SPC | 8 hr |
| May 1, 4:22 PM EDT | Severe Thunderstorm Warning | CTP | 68 min |
| May 1, 4:35 PM EDT | Tornado Warning | CTP | 55 min |
| May 1, 4:36 PM EDT | Mesoscale Discussion | SPC | 84 min |
| May 1, 5:25 PM EDT | Severe Thunderstorm Warning | CTP | 95 min |
| May 1, 5:58 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| May 6, 1:01 AM EDT | Areal Flood Advisory | CTP | 3 hr |
| May 18, 2:04 PM EDT | Mesoscale Discussion | SPC | 116 min |
| May 18, 3:17 PM EDT | Special Weather Statement | CTP | 28 min |
| May 18, 3:36 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 18, 3:47 PM EDT | Special Weather Statement | CTP | 28 min |
| May 18, 5:36 PM EDT | Mesoscale Discussion | SPC | 84 min |
| May 18, 7:04 PM EDT | Special Weather Statement | CTP | 26 min |
| May 30, 12:03 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 30, 12:17 PM EDT | Special Weather Statement | CTP | 43 min |
| May 30, 12:39 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 30, 12:44 PM EDT | Special Weather Statement | CTP | 46 min |
| May 30, 4:03 PM EDT | Mesoscale Discussion | SPC | 117 min |
| May 31, 2:03 PM EDT | Special Weather Statement | CTP | 87 min |
| Jun 5, 5:08 PM EDT | Special Weather Statement | CTP | 22 min |
| Jun 5, 6:26 PM EDT | Areal Flood Advisory | CTP | 2 hr |
| Jun 15, 11:50 AM EDT | Flash Flood Watch | CTP | 14 hr |
| Jun 15, 6:23 PM EDT | Severe Thunderstorm Warning | CTP | 67 min |
| Jun 18, 12:31 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Jun 18, 1:31 PM EDT | Flash Flood Watch | CTP | 15 hr |
| Jun 18, 1:37 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 18, 4:57 PM EDT | Severe Thunderstorm Warning | CTP | 48 min |
| Jun 18, 5:47 PM EDT | Severe Thunderstorm Warning | CTP | 58 min |
| Jun 22, 1:18 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 25, 6:59 PM EDT | Special Weather Statement | CTP | 31 min |
| Jul 17, 12:14 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 20, 11:36 AM EDT | Mesoscale Discussion | SPC | 114 min |
| Jul 20, 3:31 PM EDT | Severe Thunderstorm Warning | CTP | 59 min |
| Jul 23, 2:27 PM EDT | Flash Flood Watch | CTP | 18 hr |
| Jul 23, 3:40 PM EDT | Severe Thunderstorm Warning | CTP | 80 min |
| Jul 23, 3:44 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 23, 9:30 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Jul 23, 10:09 PM EDT | Flash Flood Warning | CTP | 4 hr |
| Aug 1, 6:45 PM EDT | Special Weather Statement | CTP | 60 min |
| Aug 3, 12:57 PM EDT | Special Weather Statement | CTP | 63 min |
| Aug 4, 1:25 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 4, 3:46 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Aug 4, 5:51 PM EDT | Special Weather Statement | CTP | 39 min |
| Aug 4, 5:59 PM EDT | Severe Thunderstorm Warning | CTP | 61 min |
| Aug 4, 7:41 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 12, 1:41 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 22, 11:55 AM EDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 22, 12:23 PM EDT | Tornado Watch | SPC | 9 hr |
| Aug 22, 2:44 PM EDT | Special Weather Statement | CTP | 31 min |
| Aug 22, 2:44 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 22, 3:14 PM EDT | Severe Thunderstorm Warning | CTP | 76 min |
| Aug 22, 4:48 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Aug 22, 5:09 PM EDT | Severe Thunderstorm Warning | CTP | 66 min |
| Aug 22, 5:38 PM EDT | Severe Thunderstorm Warning | CTP | 37 min |
| Aug 22, 5:51 PM EDT | Tornado Warning | CTP | 39 min |
| Aug 22, 6:13 PM EDT | Severe Thunderstorm Warning | CTP | 53 min |
| Sep 5, 1:22 AM EDT | Special Weather Statement | CTP | 23 min |
| Sep 16, 6:50 AM EDT | Dense Fog Advisory | CTP | 3 hr |
| Sep 30, 3:56 AM EDT | Freeze Watch | CTP | 10 hr |
| Sep 30, 1:58 PM EDT | Freeze Warning | CTP | 19 hr |
| Oct 15, 3:03 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Oct 15, 5:55 PM EDT | Severe Thunderstorm Warning | CTP | 65 min |
| Oct 23, 6:03 PM EDT | Wind Advisory | CTP | 14 hr |
| Oct 29, 4:16 AM EDT | Wind Advisory | CTP | 32 hr |
| Oct 29, 8:30 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Oct 29, 11:54 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Oct 30, 2:50 AM EDT | Areal Flood Advisory | CTP | 3 hr |
| Nov 5, 8:55 PM EST | Special Weather Statement | CTP | 35 min |
| Nov 18, 4:05 AM EST | Wind Advisory | CTP | 32 hr |
| Dec 12, 8:18 AM EST | Special Weather Statement | CTP | 57 min |
| Dec 13, 4:05 AM EST | Winter Weather Advisory | CTP | 28 hr |
| Dec 21, 2:37 AM EST | Winter Weather Advisory | CTP | 34 hr |
| Dec 24, 3:22 AM EST | Winter Weather Advisory | CTP | 37 hr |
| Dec 24, 11:12 AM EST | Wind Advisory | CTP | 29 hr |
| Dec 27, 2:19 PM EST | Wind Chill Advisory | CTP | 21 hr |
| Dec 30, 4:31 AM EST | Wind Chill Advisory | CTP | 4 days |
| Dec 30, 3:48 PM EST | Special Weather Statement | CTP | 72 min |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
| Product | Alerts |
|---|---|
| Severe storms | |
| Severe Thunderstorm Warning | 15 |
| Tornado Warning | 2 |
| Severe Thunderstorm Watch | 4 |
| Tornado Watch | 2 |
| Mesoscale Discussion | 20 |
| Special Weather Statement | 26 |
| Flooding | |
| Flash Flood Warning | 1 |
| Flash Flood Watch | 3 |
| Flood Watch | 1 |
| Areal Flood Advisory | 8 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 2 |
| Freezing Rain Advisory | 3 |
| Winter Weather Advisory | 9 |
| Cold | |
| Freeze Warning | 1 |
| Freeze Watch | 1 |
| Wind Chill Advisory | 2 |
| Wind and dust | |
| Wind Advisory | 7 |
| Fog and smoke | |
| Dense Fog Advisory | 4 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20162018
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.