Alert archive / Pennsylvania / Somerset County
Weather alerts in Somerset County, Pennsylvania, 2015
130 weather alerts in 2015, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Somerset County and its neighbors
Each county as a circle sized by its count in 2015. Tap one for its archive.
- Alerts
- 130
- Warnings
- 16
- Watches
- 19
- Advisories
- 48
- Busiest month
- June40 alerts
- Busiest day
- June 15, 20158 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Somerset County, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 10 | 5 | 50% | 5 | 80% | 28 min |
| Flash flood warnings | 0 | 0 |
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 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 6, 3:28 PM EST | Winter Weather Advisory | CTP | 30 hr |
| Jan 9, 1:30 AM EST | Wind Advisory | CTP | 10 hr |
| Jan 9, 4:23 AM EST | Wind Chill Advisory | CTP | 32 hr |
| Jan 9, 9:39 AM EST | Special Weather Statement | CTP | 111 min |
| Jan 9, 11:12 AM EST | Special Weather Statement | CTP | 63 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 24, 5:35 PM EST | Freezing Rain Advisory | CTP | 11 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, 3:19 AM EST | Wind Chill Advisory | CTP | 29 hr |
| Jan 30, 3:42 PM EST | Winter Storm Watch | CTP | 23 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 5, 3:50 AM EST | Wind Chill Advisory | CTP | 29 hr |
| Feb 11, 2:54 PM EST | Winter Storm Watch | CTP | 4 hr |
| Feb 11, 7:21 PM EST | Winter Weather Advisory | CTP | 26 hr |
| Feb 12, 3:10 AM EST | Wind Chill Advisory | CTP | 32 hr |
| 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 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 | Winter Weather Advisory | CTP | 31 hr |
| Feb 18, 3:28 PM EST | Special Weather Statement | CTP | 77 min |
| Feb 18, 4:09 PM EST | Special Weather Statement | CTP | 21 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 4, 2:59 PM EST | River Flood Warning | CTP | 7 hr |
| Mar 4, 6:42 PM EST | Areal Flood Advisory | CTP | 3 hr |
| Mar 10, 5:30 PM EDT | Dense Fog Advisory | CTP | 16 hr |
| Mar 13, 2:41 AM EDT | Flood Watch | CTP | 41 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, 4:57 PM EDT | Special Weather Statement | CTP | 33 min |
| Apr 20, 3:08 PM EDT | Tornado Watch | SPC | 9 hr |
| Apr 20, 6:48 PM EDT | Special Weather Statement | CTP | 57 min |
| 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, 5:45 PM EDT | Special Weather Statement | CTP | 60 min |
| May 11, 7:26 PM EDT | Mesoscale Discussion | SPC | 64 min |
| May 13, 4:18 AM EDT | Frost Advisory | CTP | 28 hr |
| May 16, 1:35 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 16, 1:44 PM EDT | Special Weather Statement | CTP | 46 min |
| May 16, 2:25 PM EDT | Areal Flood Advisory | CTP | 3 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 |
| Jun 5, 8:42 PM EDT | Special Weather Statement | CTP | 33 min |
| Jun 8, 1:31 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Jun 8, 2:44 PM EDT | Severe Thunderstorm Warning | CTP | 61 min |
| Jun 8, 2:57 PM EDT | Special Weather Statement | CTP | 33 min |
| Jun 12, 6:53 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Jun 12, 7:25 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 12, 7:52 PM EDT | Severe Thunderstorm Warning | CTP | 53 min |
| Jun 14, 11:46 AM EDT | Special Weather Statement | CTP | 44 min |
| Jun 14, 2:06 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Jun 14, 2:51 PM EDT | Flash Flood Watch | CTP | 14 hr |
| Jun 14, 8:49 PM EDT | Mesoscale Discussion | SPC | 56 min |
| Jun 14, 10:18 PM EDT | Severe Thunderstorm Warning | CTP | 72 min |
| Jun 14, 10:56 PM EDT | Areal Flood Advisory | CTP | 4 hr |
| Jun 14, 11:35 PM EDT | Special Weather Statement | CTP | 25 min |
| Jun 15, 12:02 AM EDT | Special Weather Statement | CTP | 28 min |
| Jun 15, 12:21 AM EDT | Special Weather Statement | CTP | 24 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 18, 1:24 PM EDT | Special Weather Statement | CTP | 51 min |
| Jun 18, 10:26 PM EDT | Special Weather Statement | CTP | 34 min |
| Jun 18, 10:59 PM EDT | Special Weather Statement | CTP | 46 min |
| Jun 19, 2:41 PM EDT | Flood Watch | CTP | 39 hr |
| Jun 20, 1:36 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Jun 20, 2:23 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 20, 4:05 PM EDT | Special Weather Statement | CTP | 70 min |
| Jun 20, 4:16 PM EDT | Severe Thunderstorm Warning | CTP | 74 min |
| Jun 20, 5:06 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Jun 20, 5:16 PM EDT | Severe Thunderstorm Warning | CTP | 74 min |
| Jun 20, 6:24 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Jun 23, 10:20 AM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 23, 10:28 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 23, 1:55 PM EDT | Severe Thunderstorm Warning | CTP | 54 min |
| Jun 23, 3:19 PM EDT | Special Weather Statement | CTP | 26 min |
| Jun 23, 3:25 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Jun 23, 3:56 PM EDT | Severe Thunderstorm Warning | CTP | 64 min |
| Jun 26, 3:55 AM EDT | Flood Watch | CTP | 44 hr |
| Jun 27, 4:46 PM EDT | Areal Flood Warning | CTP | 3 hr |
| Jun 30, 1:21 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 30, 3:48 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Jun 30, 7:38 PM EDT | Mesoscale Discussion | SPC | 67 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 7, 9:02 PM EDT | Severe Thunderstorm Warning | CTP | 28 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, 2:21 PM EDT | Severe Thunderstorm Warning | CTP | 54 min |
| Jul 9, 3:09 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Jul 9, 4:55 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Jul 14, 3:16 PM EDT | Special Weather Statement | CTP | 44 min |
| Jul 14, 3:58 PM EDT | Mesoscale Discussion | SPC | 62 min |
| Aug 3, 6:57 PM EDT | Severe Thunderstorm Warning | CTP | 78 min |
| Aug 4, 1:07 AM EDT | Special Weather Statement | PBZ | 23 min |
| Aug 20, 11:49 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 2, 2:30 PM EDT | Special Weather Statement | CTP | 45 min |
| Sep 4, 3:32 PM EDT | Special Weather Statement | CTP | 58 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 27, 1:11 PM EDT | Wind Advisory | CTP | 22 hr |
| Nov 11, 2:44 PM EST | Wind Advisory | CTP | 31 hr |
| Nov 13, 9:51 AM EST | Wind Advisory | CTP | 8 hr |
| Nov 18, 3:01 AM EST | Wind Advisory | CTP | 21 hr |
| Nov 30, 4:17 PM EST | Freezing Rain Advisory | CTP | 6 hr |
| Dec 18, 8:58 PM EST | Special Weather Statement | CTP | 62 min |
| 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.
| Product | Alerts |
|---|---|
| Severe storms | |
| Severe Thunderstorm Warning | 10 |
| Severe Thunderstorm Watch | 4 |
| Tornado Watch | 2 |
| Mesoscale Discussion | 20 |
| Special Weather Statement | 27 |
| Flooding | |
| Areal Flood Warning | 1 |
| River Flood Warning | 1 |
| Flash Flood Watch | 4 |
| Flood Watch | 4 |
| Areal Flood Advisory | 10 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 4 |
| Freezing Rain Advisory | 3 |
| Winter Weather Advisory | 19 |
| Cold | |
| Wind Chill Warning | 2 |
| Wind Chill Watch | 1 |
| Frost Advisory | 2 |
| Wind Chill Advisory | 6 |
| Wind and dust | |
| Wind Advisory | 7 |
| Fog and smoke | |
| Dense Fog Advisory | 1 |
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.