Alert archive / Pennsylvania / Tioga County
Weather alerts in Tioga County, Pennsylvania, 2009
140 weather alerts in 2009, 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 2009. Tap one for its archive.
- Alerts
- 140
- Warnings
- 21
- Watches
- 18
- Advisories
- 45
- Busiest month
- August26 alerts
- Busiest day
- June 26, 200910 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 1 tornado warnings covering Tioga County in 2009 had a tornado report inside them.
Tioga County, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 10 | 7 | 30% | 16 | 75% | 33 min |
| Flash flood warnings | 0 | 0 |
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, 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, 12:56 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Jan 14, 4:25 AM EST | Winter Weather Advisory | CTP | 38 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 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 |
| Jan 28, 7:53 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Feb 11, 3:09 PM EST | Wind Advisory | CTP | 32 hr |
| Feb 11, 8:00 PM EST | Mesoscale Discussion | SPC | 60 min |
| Feb 11, 8:19 PM EST | Severe Thunderstorm Watch | SPC | 3 hr |
| Feb 17, 2:45 PM EST | Winter Weather Advisory | CTP | 34 hr |
| Feb 18, 12:38 PM EST | Mesoscale Discussion | SPC | 3 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 10, 4:07 AM EDT | Flood Watch | CTP | 23 hr |
| Mar 10, 3:48 PM EDT | Wind Advisory | CTP | 28 hr |
| Mar 10, 9:17 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Mar 23, 4:48 AM EDT | Red Flag Warning | CTP | 15 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 21, 5:54 PM EDT | Special Weather Statement | CTP | 51 min |
| Apr 28, 10:43 AM EDT | Red Flag Warning | CTP | 9 hr |
| May 9, 3:38 AM EDT | Wind Advisory | CTP | 23 hr |
| May 10, 2:37 AM EDT | Frost Advisory | CTP | 29 hr |
| May 11, 2:59 PM EDT | Frost Advisory | CTP | 18 hr |
| May 12, 3:55 AM EDT | Frost Advisory | CTP | 29 hr |
| May 15, 2:39 AM EDT | Dense Fog Advisory | CTP | 5 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, 1:33 PM EDT | Severe Thunderstorm Warning | CTP | 57 min |
| May 16, 1:42 PM EDT | Tornado Warning | CTP | 33 min |
| May 16, 3:38 PM EDT | Special Weather Statement | CTP | 37 min |
| May 16, 3:55 PM EDT | Mesoscale Discussion | SPC | 65 min |
| May 16, 4:16 PM EDT | Special Weather Statement | CTP | 29 min |
| May 16, 4:25 PM EDT | Severe Thunderstorm Warning | CTP | 65 min |
| May 16, 6:29 PM EDT | Mesoscale Discussion | SPC | 2 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 23, 12:49 PM EDT | Mesoscale Discussion | SPC | 56 min |
| May 30, 3:37 PM EDT | Freeze Watch | CTP | 14 hr |
| May 31, 5:50 AM EDT | Frost Advisory | CTP | 26 hr |
| Jun 9, 11:48 AM EDT | Mesoscale Discussion | SPC | 87 min |
| Jun 9, 1:31 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 11, 4:04 AM EDT | Flash Flood Watch | CTP | 23 hr |
| Jun 20, 10:52 AM EDT | Areal Flood Advisory | CTP | 3 hr |
| Jun 25, 3:51 PM EDT | Mesoscale Discussion | SPC | 54 min |
| Jun 25, 5:05 PM EDT | Special Weather Statement | CTP | 25 min |
| Jun 25, 5:13 PM EDT | Severe Thunderstorm Warning | CTP | 62 min |
| Jun 26, 12:32 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 26, 12:54 PM EDT | Special Weather Statement | CTP | 36 min |
| Jun 26, 1:19 PM EDT | Areal Flood Advisory | CTP | 116 min |
| Jun 26, 1:21 PM EDT | Special Weather Statement | CTP | 24 min |
| Jun 26, 1:29 PM EDT | Special Weather Statement | CTP | 31 min |
| Jun 26, 1:43 PM EDT | Severe Thunderstorm Warning | CTP | 62 min |
| Jun 26, 1:51 PM EDT | Special Weather Statement | CTP | 39 min |
| Jun 26, 2:59 PM EDT | Special Weather Statement | CTP | 46 min |
| Jun 26, 3:16 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Jun 26, 6:29 PM EDT | Mesoscale Discussion | SPC | 61 min |
| Jun 29, 10:35 PM EDT | Special Weather Statement | CTP | 25 min |
| Jun 30, 3:22 PM EDT | Special Weather Statement | CTP | 38 min |
| Jun 30, 4:50 PM EDT | Severe Thunderstorm Warning | CTP | 55 min |
| Jul 2, 6:44 PM EDT | Special Weather Statement | CTP | 31 min |
| Jul 11, 10:31 AM EDT | Mesoscale Discussion | SPC | 59 min |
| Jul 11, 2:35 PM EDT | Areal Flood Advisory | CTP | 117 min |
| Jul 11, 2:59 PM EDT | Special Weather Statement | CTP | 76 min |
| Jul 11, 7:06 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Jul 11, 10:05 PM EDT | Special Weather Statement | CTP | 55 min |
| Jul 11, 10:53 PM EDT | Special Weather Statement | CTP | 52 min |
| Jul 21, 10:44 AM EDT | Flash Flood Watch | CTP | 15 hr |
| Jul 21, 1:56 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Jul 24, 2:20 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Jul 25, 3:05 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Jul 25, 3:33 PM EDT | Severe Thunderstorm Warning | CTP | 42 min |
| Jul 25, 3:50 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 25, 4:38 PM EDT | Special Weather Statement | CTP | 52 min |
| Jul 25, 7:43 PM EDT | Mesoscale Discussion | SPC | 62 min |
| Jul 26, 2:39 PM EDT | Special Weather Statement | CTP | 36 min |
| Aug 1, 4:05 AM EDT | Dense Fog Advisory | CTP | 5 hr |
| 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, 2:20 PM EDT | Severe Thunderstorm Warning | CTP | 70 min |
| Aug 9, 2:45 PM EDT | Mesoscale Discussion | SPC | 60 min |
| Aug 9, 3:01 PM EDT | Severe Thunderstorm Warning | CTP | 59 min |
| Aug 9, 3:47 PM EDT | Severe Thunderstorm Warning | CTP | 43 min |
| Aug 9, 4:05 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| 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 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, 3:13 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 11, 5:05 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Aug 12, 5:33 PM EDT | Areal Flood Advisory | CTP | 87 min |
| 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, 5:45 PM EDT | Special Weather Statement | CTP | 30 min |
| Aug 18, 5:46 PM EDT | Special Weather Statement | CTP | 59 min |
| Aug 18, 6:26 PM EDT | Special Weather Statement | CTP | 34 min |
| Aug 19, 1:21 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Aug 20, 10:40 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Aug 21, 12:18 AM EDT | Special Weather Statement | CTP | 27 min |
| Aug 23, 5:15 PM EDT | Special Weather Statement | CTP | 45 min |
| Aug 23, 5:39 PM EDT | Areal Flood Advisory | CTP | 111 min |
| Sep 19, 3:19 PM EDT | Frost Advisory | CTP | 18 hr |
| Sep 23, 6:16 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Sep 28, 9:56 AM EDT | Special Weather Statement | CTP | 64 min |
| Sep 28, 2:35 PM EDT | Special Weather Statement | CTP | 40 min |
| Sep 28, 2:46 PM EDT | Special Weather Statement | CTP | 29 min |
| Sep 30, 2:11 PM EDT | Frost Advisory | CTP | 14 hr |
| Oct 1, 3:05 PM EDT | Frost Advisory | CTP | 16 hr |
| Oct 6, 2:59 PM EDT | Wind Advisory | CTP | 29 hr |
| Oct 7, 4:54 AM EDT | Special Weather Statement | CTP | 51 min |
| 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 |
| Oct 15, 4:26 AM EDT | Winter Weather Advisory | CTP | 65 hr |
| Oct 17, 5:47 AM EDT | Winter Weather Advisory | CTP | 16 hr |
| Nov 5, 7:28 PM EST | Special Weather Statement | CTP | 107 min |
| Nov 26, 3:07 AM EST | Dense Fog Advisory | CTP | 6 hr |
| Dec 8, 6:12 AM EST | Winter Weather Advisory | CTP | 26 hr |
| Dec 8, 11:32 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Dec 9, 3:38 AM EST | Wind Advisory | CTP | 26 hr |
| Dec 10, 9:49 PM EST | Wind Chill Advisory | CTP | 10 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 27, 3:58 PM EST | Winter Weather Advisory | CTP | 14 hr |
| Dec 28, 11:53 AM EST | Winter Weather Advisory | CTP | 24 hr |
| Dec 28, 2:33 PM EST | Wind Advisory | CTP | 28 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 | 10 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 8 |
| Mesoscale Discussion | 29 |
| Special Weather Statement | 27 |
| Flooding | |
| Flash Flood Watch | 2 |
| Flood Watch | 1 |
| Areal Flood Advisory | 10 |
| Winter | |
| Winter Storm Warning | 3 |
| Winter Storm Watch | 3 |
| Freezing Rain Advisory | 1 |
| Winter Weather Advisory | 10 |
| Cold | |
| Freeze Warning | 3 |
| Wind Chill Warning | 1 |
| Freeze Watch | 3 |
| Frost Advisory | 8 |
| Wind Chill Advisory | 3 |
| Wind and dust | |
| High Wind Watch | 1 |
| Wind Advisory | 8 |
| Fire | |
| Red Flag Warning | 3 |
| Fog and smoke | |
| Dense Fog Advisory | 5 |
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.