Alert archive / Pennsylvania / Tioga County
Weather alerts in Tioga County, Pennsylvania, 2023
88 weather alerts in 2023, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Tioga County and its neighbors
Each county as a circle sized by its count in 2023. Tap one for its archive.
- Alerts
- 88
- Warnings
- 10
- Watches
- 16
- Advisories
- 25
- Busiest month
- August14 alerts
- Busiest day
- September 9, 20236 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 Tioga County in 2023 had a tornado report inside them.
Tioga County, 2023
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 2 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 5 | 3 | 40% | 5 | 100% | 21 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2023
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS State College, PA: tornado warnings | 18 | 5 | 72% | 15 | 40% | 3 min |
| NWS State College, PA: severe thunderstorm warnings | 186 | 136 | 27% | 381 | 83% | 19 min |
| NWS State College, PA: flash flood warnings | 8 | 3 | 63% | 8 | 63% | 42 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 3, 2:21 AM EST | Dense Fog Advisory | CTP | 7 hr |
| Jan 16, 2:04 PM EST | Winter Weather Advisory | CTP | 20 hr |
| Jan 18, 2:33 PM EST | Winter Weather Advisory | CTP | 22 hr |
| Jan 21, 2:13 PM EST | Winter Weather Advisory | CTP | 43 hr |
| Jan 24, 4:16 AM EST | Winter Storm Watch | CTP | 23 hr |
| Jan 24, 4:16 AM EST | Winter Weather Advisory | CTP | 42 hr |
| Feb 2, 3:32 AM EST | Wind Chill Advisory | CTP | 52 hr |
| Feb 2, 10:39 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 9, 1:18 AM EST | Winter Weather Advisory | CTP | 8 hr |
| Feb 10, 11:03 PM EST | Special Weather Statement | CTP | 72 min |
| Feb 21, 2:15 PM EST | Special Weather Statement | CTP | 30 min |
| Feb 21, 3:45 PM EST | Winter Weather Advisory | CTP | 28 hr |
| Feb 25, 8:16 AM EST | Special Weather Statement | CTP | 44 min |
| Feb 26, 3:45 PM EST | Winter Weather Advisory | CTP | 43 hr |
| Mar 2, 1:39 PM EST | Winter Weather Advisory | CTP | 43 hr |
| Mar 6, 3:44 AM EST | Winter Weather Advisory | CTP | 25 hr |
| Mar 6, 6:51 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Mar 9, 10:33 AM EST | Winter Weather Advisory | CTP | 40 hr |
| Mar 13, 4:22 AM EDT | Winter Weather Advisory | CTP | 38 hr |
| Mar 29, 5:05 PM EDT | Mesoscale Discussion | SPC | 4 hr |
| Mar 29, 7:16 PM EDT | Special Weather Statement | CTP | 59 min |
| Mar 29, 8:03 PM EDT | Special Weather Statement | CTP | 57 min |
| Mar 31, 3:22 PM EDT | Wind Advisory | CTP | 35 hr |
| Apr 1, 2:02 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Apr 1, 2:27 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Apr 1, 3:31 PM EDT | Severe Thunderstorm Warning | CTP | 59 min |
| Apr 5, 10:05 PM EDT | Special Weather Statement | CTP | 55 min |
| Apr 11, 3:49 PM EDT | Fire Weather Watch | CTP | 17 hr |
| Apr 12, 8:54 AM EDT | Red Flag Warning | CTP | 11 hr |
| Apr 16, 11:37 PM EDT | Special Weather Statement | CTP | 23 min |
| Apr 17, 12:05 AM EDT | Special Weather Statement | CTP | 70 min |
| May 14, 1:03 PM EDT | Frost Advisory | CTP | 18 hr |
| May 16, 3:09 PM EDT | Freeze Watch | CTP | 20 hr |
| May 17, 11:05 AM EDT | Freeze Warning | CTP | 21 hr |
| May 25, 2:45 AM EDT | Frost Advisory | CTP | 28 hr |
| May 26, 1:00 PM EDT | Frost Advisory | CTP | 19 hr |
| Jun 5, 3:30 PM EDT | Fire Weather Watch | CTP | 17 hr |
| Jun 6, 8:26 AM EDT | Red Flag Warning | CTP | 12 hr |
| Jun 15, 7:59 AM EDT | Special Weather Statement | CTP | 2 hr |
| Jun 26, 9:37 AM EDT | Mesoscale Discussion | SPC | 83 min |
| Jun 26, 12:36 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 26, 12:45 PM EDT | Special Weather Statement | CTP | 30 min |
| Jun 26, 1:11 PM EDT | Severe Thunderstorm Watch | SPC | 11 hr |
| Jul 1, 1:54 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 4, 4:10 AM EDT | Dense Fog Advisory | CTP | 5 hr |
| Jul 8, 3:12 PM EDT | Flood Watch | CTP | 26 hr |
| Jul 12, 2:21 PM EDT | Special Weather Statement | CTP | 24 min |
| Jul 13, 8:08 PM EDT | Special Weather Statement | CTP | 52 min |
| Jul 15, 5:50 AM EDT | Dense Fog Advisory | CTP | 3 hr |
| Jul 20, 4:56 PM EDT | Mesoscale Discussion | SPC | 94 min |
| Jul 20, 6:19 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jul 20, 9:44 PM EDT | Severe Thunderstorm Warning | CTP | 46 min |
| Jul 20, 10:07 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Jul 20, 10:31 PM EDT | Severe Thunderstorm Warning | CTP | 44 min |
| Jul 29, 1:58 AM EDT | Areal Flood Advisory | CTP | 2 hr |
| Jul 29, 4:59 PM EDT | Special Weather Statement | CTP | 61 min |
| Aug 4, 11:21 AM EDT | Mesoscale Discussion | SPC | 114 min |
| Aug 4, 12:10 PM EDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Aug 4, 1:12 PM EDT | Special Weather Statement | CTP | 48 min |
| Aug 4, 1:36 PM EDT | Severe Thunderstorm Warning | CTP | 39 min |
| Aug 5, 5:57 AM EDT | Dense Fog Advisory | CTP | 3 hr |
| Aug 7, 12:39 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 7, 1:20 PM EDT | Tornado Watch | SPC | 11 hr |
| Aug 7, 3:17 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Aug 7, 3:18 PM EDT | Tornado Warning | CTP | 27 min |
| Aug 7, 5:11 PM EDT | Areal Flood Advisory | CTP | 2 hr |
| Aug 12, 12:50 PM EDT | Tornado Watch | SPC | 8 hr |
| Aug 12, 4:04 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Aug 15, 7:05 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Aug 29, 1:57 PM EDT | Flood Watch | CTP | 14 hr |
| Sep 7, 11:58 AM EDT | Mesoscale Discussion | SPC | 3 hr |
| Sep 7, 1:14 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Sep 7, 3:46 PM EDT | Special Weather Statement | CTP | 44 min |
| Sep 8, 7:38 PM EDT | Special Weather Statement | CTP | 37 min |
| Sep 9, 2:08 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Sep 9, 3:02 PM EDT | Special Weather Statement | CTP | 28 min |
| Sep 9, 4:23 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Sep 9, 4:40 PM EDT | Severe Thunderstorm Warning | CTP | 50 min |
| Sep 9, 4:48 PM EDT | Tornado Warning | CTP | 27 min |
| Sep 9, 6:06 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Sep 9, 8:08 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 12, 3:19 PM EDT | Flood Watch | CTP | 12 hr |
| Oct 1, 2:31 AM EDT | Dense Fog Advisory | CTP | 7 hr |
| Oct 3, 3:46 AM EDT | Dense Fog Advisory | CTP | 6 hr |
| Oct 4, 2:53 AM EDT | Dense Fog Advisory | CTP | 7 hr |
| Nov 28, 6:15 AM EST | Special Weather Statement | CTP | 75 min |
| Nov 28, 7:26 AM EST | Special Weather Statement | CTP | 64 min |
| Dec 16, 1:39 PM EST | Flood Watch | CTP | 46 hr |
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 | 5 |
| Tornado Warning | 2 |
| Severe Thunderstorm Watch | 6 |
| Tornado Watch | 2 |
| Mesoscale Discussion | 18 |
| Special Weather Statement | 19 |
| Flooding | |
| Flood Watch | 4 |
| Areal Flood Advisory | 2 |
| Winter | |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 11 |
| Cold | |
| Freeze Warning | 1 |
| Freeze Watch | 1 |
| Frost Advisory | 3 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| Wind Advisory | 1 |
| Fire | |
| Red Flag Warning | 2 |
| Fire Weather Watch | 2 |
| Fog and smoke | |
| Dense Fog Advisory | 7 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20222024
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.