Alert archive / Pennsylvania / Blair County
Weather alerts in Blair County, Pennsylvania, 2015
145 weather alerts in 2015, 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 2015. Tap one for its archive.
- Alerts
- 145
- Warnings
- 25
- Watches
- 18
- Advisories
- 48
- Busiest month
- June34 alerts
- Busiest day
- February 18, 20157 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, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 15 | 11 | 27% | 8 | 75% | 19 min |
| Flash flood warnings | 1 | 1 | 0% | 1 | 100% | 45 min |
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 5, 2:32 PM EST | Winter Weather Advisory | CTP | 24 hr |
| Jan 6, 3:28 PM EST | Wind Chill Advisory | CTP | 46 hr |
| Jan 7, 1:04 PM EST | Special Weather Statement | CTP | 26 min |
| Jan 7, 1:50 PM EST | Special Weather Statement | CTP | 25 min |
| Jan 7, 2:40 PM EST | Special Weather Statement | CTP | 80 min |
| Jan 7, 4:59 PM EST | Special Weather Statement | CTP | 31 min |
| Jan 7, 5:39 PM EST | Special Weather Statement | CTP | 51 min |
| Jan 7, 6:51 PM EST | Special Weather Statement | CTP | 54 min |
| Jan 9, 4:23 AM EST | Wind Chill Advisory | CTP | 32 hr |
| Jan 9, 11:12 AM EST | Special Weather Statement | CTP | 63 min |
| Jan 9, 12:05 PM EST | Special Weather Statement | CTP | 55 min |
| 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 20, 2:54 PM EST | Winter Weather Advisory | CTP | 34 hr |
| Jan 23, 3:58 AM EST | Winter Weather Advisory | CTP | 32 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, 3:42 PM EST | Winter Storm Watch | CTP | 23 hr |
| Jan 31, 2:57 PM EST | Winter Storm Warning | CTP | 43 hr |
| Jan 31, 2:57 PM EST | Winter Weather Advisory | CTP | 43 hr |
| Feb 2, 11:38 AM EST | Wind Advisory | CTP | 8 hr |
| Feb 12, 3:10 AM EST | Wind Chill Advisory | CTP | 32 hr |
| Feb 12, 6:02 PM EST | Special Weather Statement | CTP | 28 min |
| 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, 3:12 AM EST | Wind Advisory | CTP | 37 hr |
| Feb 14, 3:42 AM EST | Wind Chill Warning | CTP | 54 hr |
| Feb 14, 1:33 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 14, 3:28 PM EST | Special Weather Statement | CTP | 62 min |
| Feb 14, 4:27 PM EST | Special Weather Statement | CTP | 48 min |
| Feb 16, 2:47 AM EST | Winter Weather Advisory | CTP | 28 hr |
| Feb 18, 4:05 AM EST | Wind Chill Warning | CTP | 56 hr |
| Feb 18, 4:05 AM EST | Wind Chill Advisory | CTP | 56 hr |
| Feb 18, 3:15 PM EST | Special Weather Statement | CTP | 30 min |
| Feb 18, 3:50 PM EST | Special Weather Statement | CTP | 25 min |
| Feb 18, 4:23 PM EST | Special Weather Statement | CTP | 37 min |
| Feb 18, 4:42 PM EST | Special Weather Statement | CTP | 33 min |
| Feb 18, 5:15 PM EST | Special Weather Statement | CTP | 75 min |
| Feb 20, 10:26 AM EST | Winter Storm Watch | CTP | 5 hr |
| Feb 20, 3:10 PM EST | Winter Storm Warning | CTP | 39 hr |
| Feb 20, 3:10 PM EST | Winter Weather Advisory | CTP | 39 hr |
| Feb 22, 3:13 AM EST | Wind Chill Advisory | CTP | 54 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 Watch | CTP | 14 hr |
| Mar 3, 10:39 PM EST | Areal Flood Advisory | CTP | 4 hr |
| Mar 4, 2:28 AM EST | Areal Flood Advisory | CTP | 16 hr |
| Mar 4, 3:02 AM EST | Flood Watch | CTP | 16 hr |
| Mar 4, 4:13 AM EST | Winter Storm Warning | CTP | 39 hr |
| Mar 4, 9:41 AM EST | Winter Weather Advisory | CTP | 30 hr |
| Mar 10, 5:30 PM EDT | Dense Fog Advisory | CTP | 16 hr |
| Mar 19, 4:09 AM EDT | Winter Weather Advisory | CTP | 38 hr |
| Mar 25, 2:54 AM EDT | Freezing Rain Advisory | CTP | 9 hr |
| Apr 9, 7:26 PM EDT | Mesoscale Discussion | SPC | 64 min |
| 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, 5:01 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Apr 20, 6:18 PM EDT | Special Weather Statement | CTP | 42 min |
| Apr 20, 6:31 PM EDT | Severe Thunderstorm Warning | CTP | 59 min |
| Apr 20, 7:21 PM EDT | Severe Thunderstorm Warning | CTP | 54 min |
| Apr 20, 8:08 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Apr 30, 7:32 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| May 6, 3:21 PM EDT | Mesoscale Discussion | SPC | 114 min |
| May 6, 3:50 PM EDT | Special Weather Statement | CTP | 55 min |
| May 6, 4:42 PM EDT | Severe Thunderstorm Warning | CTP | 63 min |
| May 11, 10:37 PM EDT | Severe Thunderstorm Warning | CTP | 38 min |
| May 11, 11:06 PM EDT | Severe Thunderstorm Warning | CTP | 54 min |
| May 16, 1:35 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 16, 3:45 PM EDT | Flash Flood Watch | CTP | 26 hr |
| May 22, 2:18 AM EDT | Frost Advisory | CTP | 30 hr |
| May 31, 12:51 PM EDT | Mesoscale Discussion | SPC | 114 min |
| May 31, 4:14 PM EDT | Severe Thunderstorm Warning | CTP | 44 min |
| Jun 8, 1:31 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Jun 8, 2:06 PM EDT | Special Weather Statement | CTP | 39 min |
| Jun 8, 2:34 PM EDT | Tornado Watch | SPC | 5 hr |
| Jun 8, 2:44 PM EDT | Severe Thunderstorm Warning | CTP | 61 min |
| Jun 11, 2:47 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Jun 11, 6:14 PM EDT | Severe Thunderstorm Warning | CTP | 61 min |
| Jun 12, 6:32 PM EDT | Severe Thunderstorm Warning | CTP | 73 min |
| Jun 12, 7:02 PM EDT | Severe Thunderstorm Warning | CTP | 73 min |
| Jun 12, 7:25 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 12, 7:42 PM EDT | Severe Thunderstorm Warning | CTP | 63 min |
| Jun 12, 7:52 PM EDT | Severe Thunderstorm Warning | CTP | 53 min |
| Jun 14, 2:06 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Jun 15, 1:57 AM EDT | Areal Flood Advisory | CTP | 4 hr |
| Jun 15, 2:36 PM EDT | Flash Flood Watch | CTP | 18 hr |
| Jun 15, 11:08 PM EDT | Special Weather Statement | CTP | 82 min |
| Jun 20, 6:19 PM EDT | Severe Thunderstorm Warning | CTP | 56 min |
| Jun 20, 6:24 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Jun 20, 6:31 PM EDT | Special Weather Statement | CTP | 44 min |
| Jun 20, 7:05 PM EDT | Flash Flood Warning | CTP | 3 hr |
| Jun 20, 7:17 PM EDT | Special Weather Statement | CTP | 28 min |
| Jun 21, 12:12 PM EDT | Special Weather Statement | CTP | 48 min |
| Jun 23, 10:20 AM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 23, 12:15 PM EDT | Special Weather Statement | CTP | 30 min |
| Jun 23, 2:45 PM EDT | Special Weather Statement | CTP | 45 min |
| Jun 23, 3:25 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Jun 26, 3:55 AM EDT | Flood Watch | CTP | 44 hr |
| Jun 27, 2:35 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Jun 27, 5:13 PM EDT | River Flood Warning | CTP | 10 hr |
| Jun 27, 9:22 PM EDT | Areal Flood Advisory | CTP | 6 hr |
| Jun 30, 1:21 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 30, 1:23 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Jun 30, 3:48 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Jun 30, 7:38 PM EDT | Mesoscale Discussion | SPC | 67 min |
| Jun 30, 7:55 PM EDT | Special Weather Statement | CTP | 65 min |
| Jul 4, 12:35 AM EDT | Areal Flood Advisory | CTP | 14 hr |
| Jul 4, 11:49 AM EDT | Areal Flood Advisory | CTP | 3 hr |
| Jul 5, 3:57 AM EDT | Dense Fog Advisory | CTP | 5 hr |
| Jul 7, 9:26 PM EDT | Severe Thunderstorm Warning | CTP | 49 min |
| Jul 9, 12:59 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 9, 1:27 PM EDT | Tornado Watch | SPC | 6 hr |
| Jul 9, 3:09 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Jul 9, 4:55 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Jul 14, 3:55 PM EDT | Special Weather Statement | CTP | 65 min |
| Jul 14, 3:58 PM EDT | Mesoscale Discussion | SPC | 62 min |
| Jul 14, 4:48 PM EDT | Severe Thunderstorm Warning | CTP | 72 min |
| Jul 14, 6:22 PM EDT | Special Weather Statement | CTP | 23 min |
| Jul 14, 9:48 PM EDT | Special Weather Statement | CTP | 27 min |
| Jul 18, 4:51 AM EDT | Areal Flood Advisory | CTP | 3 hr |
| Jul 21, 12:53 PM EDT | Mesoscale Discussion | SPC | 67 min |
| Aug 20, 11:49 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 23, 7:23 AM EDT | Special Weather Statement | CTP | 82 min |
| Sep 2, 5:13 PM EDT | Special Weather Statement | CTP | 32 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 |
| Oct 16, 1:49 PM EDT | Freeze Watch | CTP | 14 hr |
| Oct 16, 1:49 PM EDT | Freeze Watch | CTP | 38 hr |
| Oct 17, 3:45 AM EDT | Freeze Warning | CTP | 29 hr |
| Oct 18, 3:26 AM EDT | Freeze Warning | CTP | 30 hr |
| Nov 13, 9:51 AM EST | Wind Advisory | CTP | 8 hr |
| Nov 30, 4:17 PM EST | Freezing Rain Advisory | CTP | 6 hr |
| Dec 5, 7:03 PM EST | Dense Fog Advisory | CTP | 16 hr |
| Dec 6, 11:07 AM EST | Dense Fog Advisory | CTP | 114 min |
| Dec 6, 7:44 PM EST | Dense Fog Advisory | CTP | 16 hr |
| Dec 8, 10:07 PM EST | Dense Fog Advisory | CTP | 3 hr |
| Dec 9, 1:34 AM EST | Freezing Fog Advisory | CTP | 10 hr |
| 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 22, 9:30 PM EST | Dense Fog Advisory | CTP | 15 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.