Alert archive / Pennsylvania / Blair County
Weather alerts in Blair County, Pennsylvania, 2023
111 weather alerts in 2023, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Blair County and its neighbors
Each county as a circle sized by its count in 2023. Tap one for its archive.
- Alerts
- 111
- Warnings
- 20
- Watches
- 17
- Advisories
- 29
- Busiest month
- July19 alerts
- Busiest day
- April 1, 20237 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Blair County, 2023
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 13 | 8 | 38% | 8 | 100% | 13 min |
| Flash flood warnings | 0 | 1 | 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 19, 2:50 AM EST | Wind Advisory | CTP | 33 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 |
| Jan 26, 6:52 PM EST | Special Weather Statement | CTP | 68 min |
| Jan 26, 7:09 PM EST | Snow Squall Warning | CTP | 36 min |
| Jan 27, 5:51 AM EST | Special Weather Statement | CTP | 54 min |
| Feb 3, 1:29 AM EST | Special Weather Statement | CTP | 46 min |
| Feb 8, 12:41 PM EST | Wind Advisory | CTP | 42 hr |
| Feb 21, 3:22 AM EST | Wind Advisory | CTP | 16 hr |
| Feb 21, 3:45 PM EST | Winter Weather Advisory | CTP | 28 hr |
| 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 3, 4:29 AM EST | High Wind Watch | CTP | 8 hr |
| Mar 3, 12:41 PM EST | High Wind Warning | CTP | 24 hr |
| Mar 3, 12:41 PM EST | Wind Advisory | CTP | 26 hr |
| Mar 9, 10:33 AM EST | Winter Weather Advisory | CTP | 40 hr |
| Mar 13, 2:35 PM EDT | Wind Advisory | CTP | 33 hr |
| Mar 13, 8:12 PM EDT | Special Weather Statement | CTP | 63 min |
| Mar 29, 8:03 PM EDT | Special Weather Statement | CTP | 57 min |
| Mar 30, 3:26 AM EDT | High Wind Watch | CTP | 36 hr |
| Mar 31, 3:22 PM EDT | High Wind Warning | CTP | 30 hr |
| Mar 31, 3:22 PM EDT | Wind Advisory | CTP | 35 hr |
| Apr 1, 11:15 AM EDT | Mesoscale Discussion | SPC | 3 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, 2:50 PM EDT | Special Weather Statement | CTP | 25 min |
| Apr 1, 3:44 PM EDT | Special Weather Statement | CTP | 16 min |
| Apr 1, 3:57 PM EDT | Special Weather Statement | CTP | 48 min |
| Apr 1, 4:25 PM EDT | Special Weather Statement | CTP | 50 min |
| Apr 5, 9:57 PM EDT | Severe Thunderstorm Warning | CTP | 48 min |
| Apr 5, 10:20 PM EDT | Special Weather Statement | CTP | 25 min |
| Apr 5, 10:25 PM EDT | Severe Thunderstorm Warning | CTP | 50 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 23, 12:52 PM EDT | Frost Advisory | CTP | 19 hr |
| Apr 24, 3:14 AM EDT | Freeze Watch | CTP | 11 hr |
| Apr 24, 2:09 PM EDT | Freeze Warning | CTP | 19 hr |
| Apr 25, 6:51 PM EDT | Freeze Watch | CTP | 20 hr |
| Apr 26, 2:55 PM EDT | Frost Advisory | CTP | 8 hr |
| May 4, 12:58 PM EDT | Frost Advisory | CTP | 20 hr |
| May 14, 4:27 AM EDT | Dense Fog Advisory | CTP | 5 hr |
| May 17, 11:05 AM EDT | Frost Advisory | CTP | 21 hr |
| Jun 3, 1:27 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 3, 2:17 PM EDT | Special Weather Statement | CTP | 28 min |
| Jun 3, 6:58 PM EDT | Special Weather Statement | CTP | 47 min |
| Jun 3, 7:05 PM EDT | Severe Thunderstorm Warning | CTP | 40 min |
| 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 16, 2:38 PM EDT | Special Weather Statement | CTP | 37 min |
| Jun 16, 3:11 PM EDT | Special Weather Statement | CTP | 34 min |
| Jun 25, 10:48 PM EDT | Special Weather Statement | CTP | 27 min |
| Jun 26, 1:11 PM EDT | Severe Thunderstorm Watch | SPC | 11 hr |
| Jun 26, 3:10 PM EDT | Special Weather Statement | CTP | 35 min |
| Jun 26, 5:52 PM EDT | Special Weather Statement | CTP | 38 min |
| Jul 1, 1:54 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 1, 4:55 PM EDT | Areal Flood Advisory | CTP | 2 hr |
| Jul 1, 5:24 PM EDT | Areal Flood Advisory | CTP | 2 hr |
| Jul 13, 10:04 PM EDT | Severe Thunderstorm Warning | CTP | 56 min |
| Jul 14, 2:02 PM EDT | Special Weather Statement | CTP | 28 min |
| Jul 14, 2:29 PM EDT | Special Weather Statement | CTP | 31 min |
| Jul 14, 2:51 PM EDT | Special Weather Statement | CTP | 24 min |
| Jul 15, 5:50 AM EDT | Dense Fog Advisory | CTP | 3 hr |
| Jul 15, 9:45 PM EDT | Special Weather Statement | CTP | 45 min |
| Jul 17, 4:04 PM EDT | Special Weather Statement | CTP | 41 min |
| Jul 20, 6:19 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jul 20, 9:58 PM EDT | Special Weather Statement | CTP | 47 min |
| Jul 20, 10:05 PM EDT | Severe Thunderstorm Warning | CTP | 25 min |
| Jul 20, 10:37 PM EDT | Special Weather Statement | CTP | 53 min |
| Jul 20, 10:57 PM EDT | Severe Thunderstorm Warning | CTP | 63 min |
| Jul 20, 11:06 PM EDT | Areal Flood Advisory | CTP | 2 hr |
| Jul 20, 11:46 PM EDT | Severe Thunderstorm Warning | CTP | 74 min |
| Jul 26, 5:36 AM EDT | Heat Advisory | CTP | 62 hr |
| Jul 29, 6:06 AM EDT | Mesoscale Discussion | SPC | 114 min |
| Aug 3, 7:10 PM EDT | Special Weather Statement | CTP | 35 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, 3:05 PM EDT | Special Weather Statement | CTP | 40 min |
| Aug 4, 6:13 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 7, 12:14 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 7, 1:20 PM EDT | Tornado Watch | SPC | 11 hr |
| Aug 7, 1:49 PM EDT | Severe Thunderstorm Warning | CTP | 41 min |
| Aug 12, 12:50 PM EDT | Tornado Watch | SPC | 8 hr |
| Aug 12, 4:04 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Aug 12, 8:06 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Aug 12, 8:36 PM EDT | Severe Thunderstorm Warning | CTP | 39 min |
| Aug 12, 9:10 PM EDT | Severe Thunderstorm Warning | CTP | 50 min |
| Aug 25, 2:02 AM EDT | Mesoscale Discussion | SPC | 118 min |
| Aug 29, 1:57 PM EDT | Flood Watch | CTP | 14 hr |
| Sep 7, 11:58 AM EDT | Mesoscale Discussion | SPC | 3 hr |
| Sep 8, 1:44 PM EDT | Special Weather Statement | CTP | 31 min |
| Sep 8, 6:58 PM EDT | Special Weather Statement | CTP | 32 min |
| Sep 8, 7:46 PM EDT | Areal Flood Advisory | CTP | 2 hr |
| Sep 9, 2:08 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Sep 9, 2:31 PM EDT | Severe Thunderstorm Warning | CTP | 29 min |
| Sep 9, 3:13 PM EDT | Special Weather Statement | CTP | 32 min |
| Sep 9, 3:47 PM EDT | Severe Thunderstorm Warning | CTP | 43 min |
| Sep 9, 4:12 PM EDT | Severe Thunderstorm Warning | CTP | 33 min |
| Sep 9, 4:23 PM EDT | Severe Thunderstorm Watch | SPC | 5 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 |
| Oct 21, 3:45 PM EDT | Freeze Watch | CTP | 23 hr |
| Oct 23, 1:30 PM EDT | Frost Advisory | CTP | 20 hr |
| Oct 30, 3:02 AM EDT | Freeze Warning | CTP | 30 hr |
| Nov 20, 3:14 AM EST | Winter Weather Advisory | CTP | 35 hr |
| Nov 27, 10:43 PM EST | Special Weather Statement | CTP | 32 min |
| Nov 27, 11:24 PM EST | Special Weather Statement | CTP | 36 min |
| Dec 3, 5:17 PM EST | Special Weather Statement | CTP | 28 min |
| Dec 3, 5:28 PM EST | Special Weather Statement | CTP | 32 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 | 13 |
| Severe Thunderstorm Watch | 6 |
| Tornado Watch | 2 |
| Mesoscale Discussion | 12 |
| Special Weather Statement | 33 |
| Flooding | |
| Flood Watch | 1 |
| Areal Flood Advisory | 4 |
| Winter | |
| Snow Squall Warning | 1 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 7 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Freeze Warning | 2 |
| Freeze Watch | 3 |
| Frost Advisory | 5 |
| Wind and dust | |
| High Wind Warning | 2 |
| High Wind Watch | 2 |
| Wind Advisory | 6 |
| Fire | |
| Red Flag Warning | 2 |
| Fire Weather Watch | 2 |
| Fog and smoke | |
| Dense Fog Advisory | 6 |
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.