Alert archive / Pennsylvania / Jefferson County
Weather alerts in Jefferson County, Pennsylvania, 2014
135 weather alerts in 2014, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Jefferson County and its neighbors
Each county as a circle sized by its count in 2014. Tap one for its archive.
- Alerts
- 135
- Warnings
- 29
- Watches
- 17
- Advisories
- 45
- Busiest month
- June27 alerts
- Busiest day
- July 7, 20148 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 3 tornado warnings covering Jefferson County in 2014 had a tornado report inside them; 2 of 2 tornado reports fell inside a warning, on average 10 minutes after it went out.
Jefferson County, 2014
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 3 | 1 | 67% | 2 | 100% | 10 min |
| Severe thunderstorm warnings | 18 | 15 | 17% | 27 | 74% | 23 min |
| Flash flood warnings | 2 | 2 | 0% | 4 | 100% | 40 min |
Each office's whole area, 2014
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Pittsburgh, PA: tornado warnings | 9 | 2 | 78% | 6 | 67% | 6 min |
| NWS Pittsburgh, PA: severe thunderstorm warnings | 147 | 106 | 28% | 399 | 80% | 22 min |
| NWS Pittsburgh, PA: flash flood warnings | 15 | 10 | 33% | 31 | 87% | 51 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 1, 2:28 PM EST | Wind Chill Advisory | PBZ | 61 hr |
| Jan 1, 2:28 PM EST | Winter Weather Advisory | PBZ | 46 hr |
| Jan 4, 3:37 AM EST | Wind Chill Watch | PBZ | 24 hr |
| Jan 5, 3:53 AM EST | Wind Chill Warning | PBZ | 61 hr |
| Jan 5, 3:05 PM EST | Winter Weather Advisory | PBZ | 26 hr |
| Jan 6, 2:08 AM EST | Special Weather Statement | PBZ | 52 min |
| Jan 7, 5:18 PM EST | Wind Chill Advisory | PBZ | 15 hr |
| Jan 9, 2:43 PM EST | Winter Weather Advisory | PBZ | 19 hr |
| Jan 11, 4:56 PM EST | Special Weather Statement | PBZ | 2 hr |
| Jan 21, 3:16 AM EST | Wind Chill Advisory | PBZ | 33 hr |
| Jan 23, 3:56 AM EST | Wind Chill Advisory | PBZ | 32 hr |
| Jan 23, 3:22 PM EST | Winter Weather Advisory | PBZ | 62 hr |
| Jan 24, 9:44 PM EST | Wind Chill Advisory | PBZ | 37 hr |
| Jan 25, 4:14 PM EST | Special Weather Statement | PBZ | 2 hr |
| Jan 25, 6:08 PM EST | Special Weather Statement | PBZ | 67 min |
| Jan 26, 3:34 AM EST | Wind Chill Watch | PBZ | 23 hr |
| Jan 26, 3:18 PM EST | Wind Chill Advisory | PBZ | 33 hr |
| Jan 26, 3:18 PM EST | Winter Weather Advisory | PBZ | 23 hr |
| Jan 27, 2:13 AM EST | Wind Chill Warning | PBZ | 58 hr |
| Jan 28, 11:58 AM EST | Wind Chill Advisory | PBZ | 24 hr |
| Feb 3, 3:25 AM EST | Winter Storm Watch | PBZ | 24 hr |
| Feb 4, 3:40 AM EST | Winter Storm Warning | PBZ | 32 hr |
| Feb 4, 8:12 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 17, 3:45 AM EST | Winter Weather Advisory | PBZ | 30 hr |
| Feb 19, 4:17 AM EST | Freezing Rain Advisory | PBZ | 5 hr |
| Feb 20, 3:47 AM EST | Wind Advisory | PBZ | 37 hr |
| Feb 26, 2:50 PM EST | Wind Chill Advisory | PBZ | 18 hr |
| Feb 27, 9:14 AM EST | Wind Chill Advisory | PBZ | 12 hr |
| Feb 27, 9:45 AM EST | Special Weather Statement | PBZ | 2 hr |
| Feb 27, 10:18 AM EST | Winter Weather Advisory | PBZ | 3 hr |
| Feb 28, 10:00 AM EST | Winter Storm Watch | PBZ | 30 hr |
| Mar 1, 4:24 PM EST | Winter Weather Advisory | PBZ | 22 hr |
| Mar 2, 5:16 PM EST | Wind Chill Advisory | PBZ | 13 hr |
| Mar 11, 3:08 PM EDT | Winter Weather Advisory | PBZ | 31 hr |
| Mar 12, 4:19 AM EDT | Wind Chill Advisory | PBZ | 30 hr |
| Mar 12, 11:25 PM EDT | River Flood Warning | PBZ | 13 hr |
| Apr 4, 7:05 PM EDT | Special Weather Statement | PBZ | 40 min |
| Apr 12, 4:15 AM EDT | Dense Fog Advisory | PBZ | 5 hr |
| Apr 29, 6:23 AM EDT | Wind Advisory | PBZ | 10 hr |
| May 14, 1:48 PM EDT | Mesoscale Discussion | SPC | 117 min |
| May 14, 5:50 PM EDT | Mesoscale Discussion | SPC | 85 min |
| May 14, 7:01 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| May 14, 7:40 PM EDT | Flash Flood Watch | PBZ | 30 hr |
| May 17, 2:35 PM EDT | Frost Advisory | PBZ | 17 hr |
| May 18, 2:30 PM EDT | Frost Advisory | PBZ | 18 hr |
| May 21, 12:05 PM EDT | River Flood Warning | PBZ | 22 hr |
| May 22, 11:49 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 27, 1:43 PM EDT | Mesoscale Discussion | SPC | 62 min |
| Jun 3, 12:10 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 3, 3:49 PM EDT | Special Weather Statement | PBZ | 26 min |
| Jun 3, 4:32 PM EDT | Special Weather Statement | PBZ | 43 min |
| Jun 8, 11:37 AM EDT | Mesoscale Discussion | SPC | 53 min |
| Jun 8, 1:20 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 8, 4:51 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Jun 11, 2:59 PM EDT | Tornado Watch | SPC | 6 hr |
| Jun 11, 7:14 PM EDT | Severe Thunderstorm Warning | PBZ | 46 min |
| Jun 11, 7:25 PM EDT | Severe Thunderstorm Warning | PBZ | 50 min |
| Jun 11, 7:50 PM EDT | Severe Thunderstorm Warning | PBZ | 40 min |
| Jun 12, 3:17 AM EDT | Flash Flood Watch | PBZ | 13 hr |
| Jun 13, 2:16 PM EDT | Special Weather Statement | PBZ | 59 min |
| Jun 16, 5:52 PM EDT | Special Weather Statement | PBZ | 23 min |
| Jun 17, 9:57 PM EDT | Severe Thunderstorm Warning | PBZ | 48 min |
| Jun 17, 10:44 PM EDT | Special Weather Statement | PBZ | 46 min |
| Jun 17, 11:00 PM EDT | Severe Thunderstorm Warning | PBZ | 45 min |
| Jun 17, 11:28 PM EDT | Severe Thunderstorm Warning | PBZ | 47 min |
| Jun 18, 5:46 PM EDT | Flash Flood Watch | PBZ | 15 hr |
| Jun 18, 6:30 PM EDT | Mesoscale Discussion | SPC | 60 min |
| Jun 18, 7:00 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 18, 8:28 PM EDT | Special Weather Statement | PBZ | 62 min |
| Jun 18, 8:38 PM EDT | Severe Thunderstorm Warning | PBZ | 52 min |
| Jun 18, 8:54 PM EDT | Severe Thunderstorm Warning | PBZ | 51 min |
| Jun 18, 9:06 PM EDT | Mesoscale Discussion | SPC | 54 min |
| Jun 18, 10:32 PM EDT | Areal Flood Advisory | PBZ | 3 hr |
| Jun 24, 12:02 PM EDT | Flash Flood Watch | PBZ | 26 hr |
| Jun 24, 7:29 PM EDT | Severe Thunderstorm Warning | PBZ | 46 min |
| Jul 1, 3:22 PM EDT | Mesoscale Discussion | SPC | 53 min |
| Jul 3, 12:16 PM EDT | Special Weather Statement | PBZ | 44 min |
| Jul 7, 2:10 PM EDT | Mesoscale Discussion | SPC | 65 min |
| Jul 7, 2:45 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 7, 3:53 PM EDT | Special Weather Statement | PBZ | 52 min |
| Jul 7, 4:15 PM EDT | Severe Thunderstorm Warning | PBZ | 45 min |
| Jul 7, 4:44 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Jul 7, 4:47 PM EDT | Severe Thunderstorm Warning | PBZ | 43 min |
| Jul 7, 5:28 PM EDT | Severe Thunderstorm Warning | PBZ | 36 min |
| Jul 7, 6:08 PM EDT | Severe Thunderstorm Warning | PBZ | 37 min |
| Jul 8, 11:29 AM EDT | Mesoscale Discussion | SPC | 91 min |
| Jul 8, 1:04 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 8, 2:43 PM EDT | Severe Thunderstorm Warning | PBZ | 62 min |
| Jul 8, 3:41 PM EDT | Severe Thunderstorm Warning | PBZ | 34 min |
| Jul 8, 4:00 PM EDT | Mesoscale Discussion | SPC | 90 min |
| Jul 9, 12:53 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 13, 12:37 PM EDT | Mesoscale Discussion | SPC | 53 min |
| Jul 13, 1:17 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 13, 4:01 PM EDT | Special Weather Statement | PBZ | 44 min |
| Jul 13, 4:04 PM EDT | Severe Thunderstorm Warning | PBZ | 26 min |
| Jul 13, 4:07 PM EDT | Tornado Warning | PBZ | 23 min |
| Jul 13, 5:11 PM EDT | Areal Flood Advisory | PBZ | 3 hr |
| Jul 15, 11:38 AM EDT | Special Weather Statement | PBZ | 37 min |
| Jul 27, 1:44 PM EDT | Tornado Watch | SPC | 9 hr |
| Jul 27, 5:04 PM EDT | Severe Thunderstorm Warning | PBZ | 26 min |
| Jul 27, 6:09 PM EDT | Mesoscale Discussion | SPC | 66 min |
| Jul 27, 8:49 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Aug 2, 11:04 PM EDT | Areal Flood Warning | PBZ | 6 hr |
| Aug 3, 10:58 AM EDT | Flash Flood Watch | PBZ | 7 hr |
| Aug 12, 12:26 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 12, 5:25 PM EDT | Areal Flood Advisory | PBZ | 95 min |
| Aug 12, 5:52 PM EDT | Severe Thunderstorm Warning | PBZ | 38 min |
| Aug 12, 6:35 PM EDT | Areal Flood Advisory | PBZ | 55 min |
| Aug 20, 9:04 PM EDT | Special Weather Statement | PBZ | 41 min |
| Aug 20, 9:51 PM EDT | Areal Flood Advisory | PBZ | 3 hr |
| Aug 21, 3:09 PM EDT | Special Weather Statement | PBZ | 51 min |
| Aug 21, 3:50 PM EDT | Flash Flood Warning | PBZ | 5 hr |
| Aug 21, 4:16 PM EDT | Tornado Warning | PBZ | 29 min |
| Aug 21, 5:12 PM EDT | Flash Flood Warning | PBZ | 3 hr |
| Aug 21, 11:40 PM EDT | Areal Flood Advisory | PBZ | 110 min |
| Sep 2, 2:25 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 2, 4:30 PM EDT | Tornado Warning | PBZ | 30 min |
| Sep 3, 5:57 AM EDT | Dense Fog Advisory | PBZ | 3 hr |
| Sep 19, 8:22 AM EDT | Special Weather Statement | PBZ | 53 min |
| Sep 21, 1:20 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Oct 2, 3:48 AM EDT | Dense Fog Advisory | PBZ | 6 hr |
| Oct 10, 3:25 PM EDT | Freeze Watch | PBZ | 23 hr |
| Oct 11, 2:31 PM EDT | Frost Advisory | PBZ | 18 hr |
| Oct 16, 4:08 AM EDT | Dense Fog Advisory | PBZ | 5 hr |
| Nov 16, 3:34 AM EST | Winter Weather Advisory | PBZ | 35 hr |
| Nov 21, 9:32 PM EST | Freezing Rain Advisory | PBZ | 16 hr |
| Nov 23, 2:42 PM EST | Wind Advisory | PBZ | 29 hr |
| Nov 27, 11:08 PM EST | Lake Effect Snow Advisory | PBZ | 11 hr |
| Dec 1, 3:48 AM EST | Freezing Rain Advisory | PBZ | 43 hr |
| Dec 11, 10:47 AM EST | Winter Weather Advisory | PBZ | 12 hr |
| Dec 12, 9:19 PM EST | Special Weather Statement | PBZ | 3 hr |
| Dec 13, 4:45 PM EST | Freezing Rain Advisory | PBZ | 16 hr |
| Dec 18, 10:39 PM EST | Winter Weather Advisory | PBZ | 10 hr |
| Dec 24, 3:47 AM EST | Wind Advisory | PBZ | 24 hr |
| Dec 24, 8:50 PM EST | Special Weather Statement | PBZ | 40 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 archive20132015
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.