Alert archive / Pennsylvania / Somerset County
Weather alerts in Somerset County, Pennsylvania, 2019
161 weather alerts in 2019, 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 2019. Tap one for its archive.
- Alerts
- 161
- Warnings
- 25
- Watches
- 28
- Advisories
- 48
- Busiest month
- May35 alerts
- Busiest day
- May 29, 20199 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
1 of 1 tornado warnings covering Somerset County in 2019 had a tornado report inside them.
Somerset County, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 1 | 0% | 0 | ||
| Severe thunderstorm warnings | 9 | 7 | 22% | 7 | 71% | 10 min |
| Flash flood warnings | 5 | 3 | 40% | 10 | 80% | 38 min |
Each office's whole area, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS State College, PA: tornado warnings | 21 | 6 | 71% | 17 | 35% | 7 min |
| NWS State College, PA: severe thunderstorm warnings | 284 | 177 | 38% | 468 | 81% | 22 min |
| NWS State College, PA: flash flood warnings | 22 | 12 | 45% | 30 | 87% | 49 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 |
|---|---|---|---|
| Dec 31, 10:01 PM EST | Wind Advisory | CTP | 12 hr |
| Jan 7, 4:04 AM EST | Winter Weather Advisory | CTP | 32 hr |
| Jan 8, 4:09 AM EST | Winter Weather Advisory | CTP | 57 hr |
| Jan 10, 2:14 AM EST | Wind Advisory | CTP | 11 hr |
| Jan 11, 2:45 PM EST | Winter Weather Advisory | CTP | 52 hr |
| Jan 16, 4:17 AM EST | Winter Weather Advisory | CTP | 6 hr |
| Jan 17, 4:17 AM EST | Winter Storm Watch | CTP | 33 hr |
| Jan 17, 3:40 PM EST | Special Weather Statement | CTP | 50 min |
| Jan 18, 4:45 AM EST | Winter Storm Warning | CTP | 53 hr |
| Jan 19, 6:24 PM EST | Mesoscale Discussion | SPC | 3 hr |
| Jan 20, 4:06 AM EST | Wind Chill Warning | CTP | 39 hr |
| Jan 20, 4:06 AM EST | Wind Chill Advisory | CTP | 33 hr |
| Jan 28, 3:13 PM EST | Wind Chill Watch | CTP | 23 hr |
| Jan 29, 2:31 PM EST | Wind Chill Warning | CTP | 45 hr |
| Jan 29, 2:31 PM EST | Wind Chill Advisory | CTP | 63 hr |
| Jan 30, 6:56 AM EST | Special Weather Statement | CTP | 49 min |
| Jan 31, 2:47 PM EST | Winter Weather Advisory | CTP | 26 hr |
| Feb 7, 1:37 AM EST | Dense Fog Advisory | CTP | 9 hr |
| Feb 8, 3:02 AM EST | Areal Flood Advisory | CTP | 3 hr |
| Feb 10, 12:25 PM EST | Winter Weather Advisory | CTP | 64 hr |
| Feb 10, 3:55 PM EST | Winter Storm Watch | CTP | 21 hr |
| Feb 11, 3:50 AM EST | Winter Storm Warning | CTP | 38 hr |
| Feb 12, 4:16 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 12, 2:20 PM EST | Wind Advisory | CTP | 28 hr |
| Feb 17, 4:05 AM EST | Winter Weather Advisory | CTP | 33 hr |
| Feb 18, 2:38 PM EST | Winter Storm Watch | CTP | 24 hr |
| Feb 19, 2:34 PM EST | Winter Storm Warning | CTP | 37 hr |
| Feb 20, 5:55 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 20, 6:32 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 22, 4:12 AM EST | High Wind Watch | CTP | 34 hr |
| Feb 23, 10:29 AM EST | Winter Weather Advisory | CTP | 21 hr |
| Feb 23, 2:24 PM EST | High Wind Warning | CTP | 47 hr |
| Feb 25, 12:54 PM EST | Wind Advisory | CTP | 6 hr |
| Feb 28, 10:21 AM EST | Winter Weather Advisory | CTP | 20 hr |
| Mar 1, 12:18 PM EST | Winter Weather Advisory | CTP | 17 hr |
| Mar 1, 3:06 PM EST | Winter Storm Watch | CTP | 37 hr |
| Mar 2, 2:37 PM EST | Winter Weather Advisory | CTP | 34 hr |
| Mar 22, 4:19 AM EDT | Wind Advisory | CTP | 15 hr |
| Mar 22, 1:48 PM EDT | Special Weather Statement | CTP | 27 min |
| Apr 2, 10:53 AM EDT | Fire Weather Watch | CTP | 16 hr |
| Apr 3, 3:07 AM EDT | Red Flag Warning | CTP | 18 hr |
| Apr 12, 3:47 PM EDT | Special Weather Statement | CTP | 28 min |
| Apr 12, 4:14 PM EDT | Special Weather Statement | CTP | 31 min |
| Apr 14, 5:57 PM EDT | Mesoscale Discussion | SPC | 63 min |
| Apr 14, 6:46 PM EDT | Tornado Watch | SPC | 8 hr |
| Apr 14, 9:14 PM EDT | Mesoscale Discussion | SPC | 61 min |
| Apr 14, 9:42 PM EDT | Special Weather Statement | CTP | 48 min |
| Apr 14, 10:17 PM EDT | Severe Thunderstorm Warning | CTP | 43 min |
| Apr 15, 3:49 AM EDT | Wind Advisory | CTP | 16 hr |
| Apr 27, 4:12 AM EDT | Wind Advisory | CTP | 11 hr |
| May 3, 2:21 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 3, 4:45 PM EDT | Mesoscale Discussion | SPC | 60 min |
| May 9, 8:41 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| May 9, 9:06 PM EDT | Flash Flood Warning | CTP | 114 min |
| May 19, 1:27 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 19, 2:36 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 23, 11:31 AM EDT | Special Weather Statement | CTP | 29 min |
| May 23, 11:52 AM EDT | Mesoscale Discussion | SPC | 83 min |
| May 23, 11:57 AM EDT | Special Weather Statement | CTP | 33 min |
| May 23, 8:58 PM EDT | Severe Thunderstorm Warning | CTP | 32 min |
| May 23, 9:09 PM EDT | Tornado Warning | CTP | 34 min |
| May 23, 9:20 PM EDT | Severe Thunderstorm Watch | SPC | 3 hr |
| May 23, 9:24 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 23, 9:30 PM EDT | Severe Thunderstorm Warning | CTP | 45 min |
| May 23, 11:42 PM EDT | Severe Thunderstorm Warning | CTP | 33 min |
| May 24, 12:18 AM EDT | Special Weather Statement | CTP | 42 min |
| May 25, 12:53 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 25, 2:47 PM EDT | Special Weather Statement | CTP | 58 min |
| May 25, 4:50 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 25, 8:16 PM EDT | Mesoscale Discussion | SPC | 59 min |
| May 25, 9:10 PM EDT | Special Weather Statement | CTP | 50 min |
| May 28, 1:02 PM EDT | Mesoscale Discussion | SPC | 118 min |
| May 28, 1:13 PM EDT | Flash Flood Watch | CTP | 32 hr |
| May 28, 1:48 PM EDT | Tornado Watch | SPC | 8 hr |
| May 28, 4:43 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 28, 8:07 PM EDT | Mesoscale Discussion | SPC | 113 min |
| May 28, 10:24 PM EDT | Special Weather Statement | CTP | 36 min |
| May 28, 10:37 PM EDT | Severe Thunderstorm Warning | CTP | 26 min |
| May 29, 12:06 PM EDT | Mesoscale Discussion | SPC | 84 min |
| May 29, 1:10 PM EDT | Tornado Watch | SPC | 8 hr |
| May 29, 3:17 PM EDT | Mesoscale Discussion | SPC | 118 min |
| May 29, 3:41 PM EDT | Severe Thunderstorm Warning | CTP | 49 min |
| May 29, 4:24 PM EDT | Severe Thunderstorm Warning | CTP | 36 min |
| May 29, 4:37 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| May 30, 3:48 AM EDT | Flash Flood Watch | CTP | 18 hr |
| Jun 13, 3:51 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Jun 17, 3:30 AM EDT | Flash Flood Watch | CTP | 42 hr |
| Jun 19, 1:49 PM EDT | Flash Flood Watch | CTP | 10 hr |
| Jun 19, 5:07 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Jun 19, 7:51 PM EDT | Areal Flood Advisory | CTP | 114 min |
| Jun 20, 4:17 AM EDT | Flash Flood Watch | CTP | 24 hr |
| Jun 24, 7:17 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 29, 12:08 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 29, 7:07 PM EDT | Special Weather Statement | CTP | 23 min |
| Jun 29, 8:03 PM EDT | Special Weather Statement | CTP | 27 min |
| Jul 2, 3:10 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Jul 2, 4:18 PM EDT | Severe Thunderstorm Warning | CTP | 57 min |
| Jul 2, 4:29 PM EDT | Special Weather Statement | CTP | 46 min |
| Jul 2, 7:12 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Jul 4, 11:51 AM EDT | Flash Flood Watch | CTP | 7 hr |
| Jul 4, 1:38 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Jul 5, 5:25 AM EDT | Flash Flood Watch | CTP | 16 hr |
| Jul 5, 1:47 PM EDT | Areal Flood Advisory | CTP | 118 min |
| Jul 5, 2:22 PM EDT | Special Weather Statement | CTP | 38 min |
| Jul 5, 2:41 PM EDT | Flash Flood Warning | CTP | 2 hr |
| Jul 5, 2:51 PM EDT | Areal Flood Advisory | CTP | 114 min |
| Jul 5, 4:39 PM EDT | Areal Flood Warning | CTP | 2 hr |
| Jul 6, 11:49 AM EDT | Flash Flood Watch | CTP | 8 hr |
| Jul 6, 4:42 PM EDT | Severe Thunderstorm Warning | CTP | 63 min |
| Jul 7, 12:01 PM EDT | Flash Flood Watch | CTP | 22 hr |
| Jul 7, 3:30 PM EDT | Areal Flood Advisory | CTP | 2 hr |
| Jul 7, 4:40 PM EDT | Flash Flood Warning | CTP | 3 hr |
| Jul 7, 5:58 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Jul 7, 6:35 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Jul 7, 7:08 PM EDT | Flash Flood Warning | CTP | 3 hr |
| Jul 10, 3:56 PM EDT | Areal Flood Advisory | CTP | 2 hr |
| Jul 11, 1:34 PM EDT | Special Weather Statement | CTP | 41 min |
| Jul 18, 3:02 PM EDT | Heat Advisory | CTP | 53 hr |
| Jul 20, 7:36 PM EDT | Special Weather Statement | CTP | 54 min |
| Jul 21, 12:00 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 21, 3:07 PM EDT | Flash Flood Watch | CTP | 35 hr |
| Jul 21, 3:17 PM EDT | Special Weather Statement | CTP | 58 min |
| Jul 21, 7:15 PM EDT | Special Weather Statement | CTP | 45 min |
| Jul 21, 7:42 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Jul 30, 12:56 PM EDT | Special Weather Statement | CTP | 49 min |
| Jul 30, 12:59 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 31, 1:09 AM EDT | Areal Flood Advisory | CTP | 3 hr |
| Jul 31, 1:15 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Jul 31, 1:50 PM EDT | Flash Flood Warning | CTP | 2 hr |
| Aug 2, 2:29 PM EDT | Special Weather Statement | PBZ | 31 min |
| Aug 8, 12:37 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 8, 5:54 PM EDT | Special Weather Statement | CTP | 51 min |
| Aug 8, 6:34 PM EDT | Special Weather Statement | CTP | 41 min |
| Aug 8, 7:14 PM EDT | Special Weather Statement | CTP | 46 min |
| Aug 15, 1:15 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 18, 3:39 PM EDT | Special Weather Statement | CTP | 21 min |
| Aug 20, 12:40 PM EDT | Special Weather Statement | CTP | 50 min |
| Aug 20, 4:39 PM EDT | Special Weather Statement | CTP | 36 min |
| Aug 20, 11:52 PM EDT | Special Weather Statement | CTP | 68 min |
| Sep 3, 5:27 AM EDT | Dense Fog Advisory | CTP | 4 hr |
| Sep 11, 3:08 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 28, 5:51 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Sep 28, 7:45 PM EDT | Special Weather Statement | CTP | 60 min |
| Oct 4, 6:08 AM EDT | Frost Advisory | CTP | 27 hr |
| Oct 12, 3:06 AM EDT | Frost Advisory | CTP | 31 hr |
| Oct 16, 4:40 AM EDT | Wind Advisory | CTP | 37 hr |
| Oct 31, 4:32 AM EDT | Wind Advisory | CTP | 29 hr |
| Oct 31, 11:12 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 31, 2:56 PM EDT | Tornado Watch | SPC | 10 hr |
| Oct 31, 4:07 PM EDT | Special Weather Statement | CTP | 53 min |
| Nov 12, 4:48 PM EST | Special Weather Statement | CTP | 57 min |
| Nov 26, 2:32 PM EST | Wind Advisory | CTP | 45 hr |
| Nov 29, 2:17 PM EST | Winter Storm Watch | CTP | 29 hr |
| Nov 30, 3:54 AM EST | Ice Storm Warning | CTP | 16 hr |
| Nov 30, 7:29 PM EST | Ice Storm Warning | CTP | 23 hr |
| Nov 30, 7:29 PM EST | Winter Weather Advisory | CTP | 63 hr |
| Dec 1, 5:45 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Dec 4, 3:10 AM EST | Winter Weather Advisory | CTP | 30 hr |
| Dec 13, 2:26 AM EST | Winter Weather Advisory | CTP | 12 hr |
| Dec 15, 1:52 PM EST | Winter Weather Advisory | CTP | 45 hr |
| Dec 18, 3:53 PM EST | Special Weather Statement | CTP | 52 min |
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 archive20182020
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.