Alert archive / Pennsylvania / Somerset County
Weather alerts in Somerset County, Pennsylvania, 2018
181 weather alerts in 2018, 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 2018. Tap one for its archive.
- Alerts
- 181
- Warnings
- 33
- Watches
- 27
- Advisories
- 66
- Busiest month
- May33 alerts
- Busiest day
- May 12, 20189 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 Somerset County in 2018 had a tornado report inside them; 0 of 2 tornado reports fell inside a warning.
Somerset County, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 2 | 0% | |
| Severe thunderstorm warnings | 14 | 9 | 36% | 17 | 94% | 31 min |
| Flash flood warnings | 2 | 2 | 0% | 5 | 80% | 133 min |
Each office's whole area, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS State College, PA: tornado warnings | 22 | 5 | 77% | 10 | 50% | 7 min |
| NWS State College, PA: severe thunderstorm warnings | 122 | 81 | 34% | 244 | 80% | 30 min |
| NWS State College, PA: flash flood warnings | 57 | 36 | 37% | 89 | 88% | 96 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, 3:29 AM EST | Wind Chill Watch | CTP | 24 hr |
| Jan 4, 3:46 AM EST | Wind Chill Warning | CTP | 62 hr |
| Jan 4, 3:46 AM EST | Wind Chill Advisory | CTP | 3 days |
| Jan 7, 2:38 PM EST | Winter Weather Advisory | CTP | 40 hr |
| Jan 10, 3:07 PM EST | Winter Storm Watch | CTP | 38 hr |
| Jan 12, 4:46 AM EST | Winter Weather Advisory | CTP | 29 hr |
| Jan 12, 7:04 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Jan 13, 1:21 PM EST | Wind Chill Advisory | CTP | 21 hr |
| Jan 15, 2:22 PM EST | Winter Weather Advisory | CTP | 41 hr |
| Jan 29, 4:32 AM EST | Winter Weather Advisory | CTP | 38 hr |
| Jan 30, 11:47 AM EST | Special Weather Statement | CTP | 58 min |
| Feb 1, 7:15 PM EST | Special Weather Statement | CTP | 90 min |
| Feb 2, 5:32 AM EST | Winter Weather Advisory | CTP | 4 hr |
| Feb 3, 2:44 PM EST | Winter Weather Advisory | CTP | 42 hr |
| Feb 5, 2:40 PM EST | Winter Storm Watch | CTP | 24 hr |
| Feb 6, 2:41 PM EST | Winter Storm Warning | CTP | 27 hr |
| Feb 7, 5:28 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Feb 11, 12:01 AM EST | Dense Fog Advisory | CTP | 10 hr |
| Feb 14, 2:59 PM EST | Flood Watch | CTP | 50 hr |
| Feb 15, 7:32 PM EST | Areal Flood Advisory | CTP | 3 hr |
| Feb 15, 10:30 PM EST | Areal Flood Advisory | CTP | 3 hr |
| Feb 16, 1:27 AM EST | Areal Flood Warning | CTP | 6 hr |
| Feb 16, 8:15 AM EST | Areal Flood Advisory | CTP | 3 hr |
| Feb 16, 2:39 PM EST | River Flood Warning | CTP | 11 hr |
| Feb 16, 5:03 PM EST | Areal Flood Advisory | CTP | 9 hr |
| Feb 16, 7:14 PM EST | Winter Weather Advisory | CTP | 33 hr |
| Feb 17, 6:33 PM EST | Winter Storm Warning | CTP | 9 hr |
| Feb 22, 11:29 AM EST | Flood Watch | CTP | 68 hr |
| Feb 25, 4:28 AM EST | Areal Flood Advisory | CTP | 5 hr |
| Mar 1, 3:26 AM EST | High Wind Watch | CTP | 13 hr |
| Mar 1, 3:48 PM EST | Winter Weather Advisory | CTP | 23 hr |
| Mar 1, 4:03 PM EST | High Wind Warning | CTP | 30 hr |
| Mar 8, 3:32 AM EST | Winter Weather Advisory | CTP | 39 hr |
| Mar 13, 3:24 AM EDT | Winter Weather Advisory | CTP | 41 hr |
| Mar 13, 4:26 PM EDT | Special Weather Statement | CTP | 49 min |
| Mar 13, 5:29 PM EDT | Special Weather Statement | CTP | 61 min |
| Mar 13, 6:42 PM EDT | Special Weather Statement | CTP | 63 min |
| Mar 19, 3:32 PM EDT | Winter Storm Watch | CTP | 13 hr |
| Mar 20, 4:36 AM EDT | Winter Storm Warning | CTP | 39 hr |
| Mar 27, 5:00 AM EDT | Winter Weather Advisory | CTP | 12 hr |
| Mar 29, 2:28 AM EDT | Dense Fog Advisory | CTP | 8 hr |
| Apr 1, 4:17 AM EDT | Winter Storm Watch | CTP | 10 hr |
| Apr 1, 2:32 PM EDT | Winter Storm Warning | CTP | 17 hr |
| Apr 3, 3:08 PM EDT | Areal Flood Advisory | CTP | 6 hr |
| Apr 3, 3:25 PM EDT | Wind Advisory | CTP | 12 hr |
| Apr 3, 6:38 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 3, 9:13 PM EDT | Special Weather Statement | CTP | 62 min |
| Apr 4, 3:36 AM EDT | High Wind Warning | CTP | 16 hr |
| Apr 4, 1:56 PM EDT | Wind Advisory | CTP | 12 hr |
| Apr 16, 1:45 PM EDT | Special Weather Statement | CTP | 45 min |
| Apr 17, 6:02 PM EDT | Special Weather Statement | CTP | 58 min |
| May 4, 2:44 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 4, 7:33 PM EDT | Special Weather Statement | CTP | 42 min |
| May 4, 8:23 PM EDT | Mesoscale Discussion | SPC | 67 min |
| May 4, 8:34 PM EDT | Special Weather Statement | CTP | 41 min |
| May 7, 1:15 AM EDT | Dense Fog Advisory | CTP | 8 hr |
| May 10, 3:13 PM EDT | Special Weather Statement | CTP | 62 min |
| May 10, 4:19 PM EDT | Special Weather Statement | CTP | 56 min |
| May 12, 1:51 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 12, 2:47 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 12, 3:23 PM EDT | Severe Thunderstorm Warning | CTP | 67 min |
| May 12, 4:19 PM EDT | Severe Thunderstorm Warning | CTP | 56 min |
| May 12, 4:52 PM EDT | Special Weather Statement | CTP | 53 min |
| May 12, 5:05 PM EDT | Mesoscale Discussion | SPC | 115 min |
| May 12, 5:48 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| May 12, 6:21 PM EDT | Severe Thunderstorm Warning | CTP | 39 min |
| May 12, 6:39 PM EDT | Special Weather Statement | CTP | 51 min |
| May 13, 4:28 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 13, 4:36 PM EDT | Severe Thunderstorm Warning | CTP | 69 min |
| May 13, 5:44 PM EDT | Severe Thunderstorm Warning | CTP | 61 min |
| May 14, 11:56 AM EDT | Mesoscale Discussion | SPC | 64 min |
| May 14, 12:29 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| May 14, 1:59 PM EDT | Severe Thunderstorm Warning | CTP | 91 min |
| May 14, 2:45 PM EDT | Severe Thunderstorm Warning | CTP | 75 min |
| May 14, 3:26 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 14, 3:59 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| May 15, 3:47 AM EDT | Flash Flood Watch | CTP | 15 hr |
| May 15, 12:26 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 15, 2:14 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 16, 1:26 PM EDT | Flood Watch | CTP | 72 hr |
| May 16, 4:16 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| May 16, 6:44 PM EDT | Areal Flood Warning | CTP | 3 hr |
| May 27, 1:14 PM EDT | Flash Flood Watch | CTP | 7 hr |
| May 31, 4:10 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Jun 2, 5:40 AM EDT | Flash Flood Watch | CTP | 22 hr |
| Jun 2, 3:44 PM EDT | Areal Flood Advisory | CTP | 2 hr |
| Jun 5, 3:05 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 5, 4:59 PM EDT | Special Weather Statement | CTP | 31 min |
| Jun 5, 5:48 PM EDT | Special Weather Statement | CTP | 27 min |
| Jun 10, 7:07 PM EDT | Special Weather Statement | CTP | 23 min |
| Jun 10, 8:12 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Jun 10, 11:07 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Jun 13, 6:10 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Jun 13, 6:33 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 13, 8:43 PM EDT | Mesoscale Discussion | SPC | 62 min |
| Jun 20, 10:00 AM EDT | Flash Flood Watch | CTP | 12 hr |
| Jun 20, 11:50 AM EDT | Areal Flood Advisory | CTP | 3 hr |
| Jun 20, 1:04 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Jun 20, 2:44 PM EDT | Flash Flood Warning | CTP | 4 hr |
| Jun 20, 3:23 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 20, 4:06 PM EDT | Flash Flood Warning | CTP | 3 hr |
| Jun 20, 5:07 PM EDT | Areal Flood Advisory | CTP | 113 min |
| Jun 20, 6:46 PM EDT | Areal Flood Warning | CTP | 6 hr |
| Jun 20, 6:58 PM EDT | Areal Flood Advisory | CTP | 6 hr |
| Jun 21, 12:43 AM EDT | Areal Flood Warning | CTP | 3 hr |
| Jun 27, 7:37 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 2, 1:03 PM EDT | Mesoscale Discussion | SPC | 72 min |
| Jul 2, 2:11 PM EDT | Areal Flood Advisory | CTP | 2 hr |
| Jul 2, 2:24 PM EDT | Special Weather Statement | CTP | 66 min |
| Jul 2, 3:22 PM EDT | Special Weather Statement | CTP | 38 min |
| Jul 2, 4:20 PM EDT | Areal Flood Advisory | CTP | 115 min |
| Jul 2, 4:23 PM EDT | Special Weather Statement | CTP | 37 min |
| Jul 2, 4:49 PM EDT | Special Weather Statement | CTP | 26 min |
| Jul 2, 4:58 PM EDT | Severe Thunderstorm Warning | CTP | 36 min |
| Jul 3, 7:55 PM EDT | Special Weather Statement | CTP | 35 min |
| Jul 5, 4:17 AM EDT | Flash Flood Watch | CTP | 30 hr |
| Jul 5, 12:45 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Jul 5, 1:35 PM EDT | Special Weather Statement | CTP | 40 min |
| Jul 5, 2:29 PM EDT | Special Weather Statement | CTP | 46 min |
| Jul 5, 3:03 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Jul 16, 5:15 PM EDT | Areal Flood Advisory | CTP | 2 hr |
| Aug 1, 4:06 AM EDT | Flash Flood Watch | CTP | 3 days |
| Aug 2, 10:31 PM EDT | Areal Flood Advisory | CTP | 119 min |
| Aug 3, 12:25 AM EDT | Areal Flood Advisory | CTP | 3 hr |
| Aug 3, 9:16 AM EDT | Areal Flood Advisory | CTP | 3 hr |
| Aug 4, 2:59 AM EDT | Dense Fog Advisory | CTP | 6 hr |
| Aug 7, 2:00 PM EDT | Special Weather Statement | CTP | 30 min |
| Aug 7, 2:24 PM EDT | Areal Flood Advisory | CTP | 2 hr |
| Aug 8, 6:01 PM EDT | Special Weather Statement | CTP | 29 min |
| Aug 8, 6:31 PM EDT | Special Weather Statement | CTP | 29 min |
| Aug 12, 5:34 PM EDT | Special Weather Statement | CTP | 26 min |
| Aug 12, 6:03 PM EDT | Areal Flood Advisory | CTP | 117 min |
| Aug 12, 6:09 PM EDT | Severe Thunderstorm Warning | CTP | 20 min |
| Aug 12, 6:38 PM EDT | Special Weather Statement | CTP | 37 min |
| Aug 13, 1:46 AM EDT | Flash Flood Watch | CTP | 43 hr |
| Aug 13, 11:10 AM EDT | Areal Flood Advisory | CTP | 3 hr |
| Aug 13, 12:05 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Aug 13, 1:05 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Aug 13, 1:57 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 16, 5:40 PM EDT | Special Weather Statement | CTP | 35 min |
| Aug 21, 2:04 PM EDT | Severe Thunderstorm Warning | CTP | 56 min |
| Aug 21, 2:16 PM EDT | Severe Thunderstorm Warning | CTP | 59 min |
| Aug 21, 2:16 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Aug 21, 2:22 PM EDT | Severe Thunderstorm Warning | CTP | 53 min |
| Aug 21, 2:41 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 21, 2:55 PM EDT | Tornado Warning | CTP | 50 min |
| Aug 21, 3:12 PM EDT | Severe Thunderstorm Warning | CTP | 63 min |
| Aug 21, 4:56 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 31, 6:13 PM EDT | Areal Flood Advisory | CTP | 2 hr |
| Sep 1, 3:24 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Sep 5, 5:21 PM EDT | Special Weather Statement | CTP | 54 min |
| Sep 6, 2:56 PM EDT | Areal Flood Advisory | CTP | 2 hr |
| Sep 7, 3:37 PM EDT | Special Weather Statement | CTP | 38 min |
| Sep 7, 7:59 PM EDT | Areal Flood Advisory | CTP | 4 hr |
| Sep 8, 3:33 AM EDT | Flood Watch | CTP | 64 hr |
| Sep 9, 3:52 AM EDT | Areal Flood Advisory | CTP | 3 hr |
| Sep 9, 7:37 AM EDT | Areal Flood Advisory | CTP | 3 hr |
| Sep 9, 10:28 AM EDT | Areal Flood Warning | CTP | 24 hr |
| Sep 9, 11:02 AM EDT | River Flood Warning | CTP | 36 hr |
| Sep 10, 10:19 AM EDT | Areal Flood Warning | CTP | 9 hr |
| Sep 17, 4:51 AM EDT | Flash Flood Watch | CTP | 31 hr |
| Sep 25, 10:25 AM EDT | Areal Flood Advisory | CTP | 3 hr |
| Sep 27, 9:25 PM EDT | Areal Flood Advisory | CTP | 4 hr |
| Oct 2, 2:26 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 2, 2:55 PM EDT | Tornado Watch | SPC | 8 hr |
| Oct 2, 6:06 PM EDT | Severe Thunderstorm Warning | CTP | 32 min |
| Oct 2, 10:13 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Oct 11, 10:12 AM EDT | Areal Flood Advisory | CTP | 3 hr |
| Oct 13, 1:13 PM EDT | Frost Advisory | CTP | 19 hr |
| Oct 20, 2:09 PM EDT | Wind Advisory | CTP | 18 hr |
| Oct 21, 1:13 AM EDT | Special Weather Statement | CTP | 62 min |
| Nov 10, 2:15 AM EST | Wind Advisory | CTP | 13 hr |
| Nov 14, 4:31 AM EST | Winter Storm Watch | CTP | 11 hr |
| Nov 14, 3:40 PM EST | Winter Storm Warning | CTP | 38 hr |
| Nov 15, 3:18 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Nov 15, 9:56 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Nov 16, 8:47 PM EST | Winter Weather Advisory | CTP | 11 hr |
| Nov 23, 11:02 AM EST | Winter Weather Advisory | CTP | 27 hr |
| Nov 29, 1:26 PM EST | Winter Weather Advisory | CTP | 24 hr |
| Dec 5, 3:26 PM EST | Special Weather Statement | CTP | 49 min |
| Dec 21, 2:20 PM EST | Winter Weather Advisory | CTP | 22 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 archive20172019
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.