Alert archive / Pennsylvania / Jefferson County
Weather alerts in Jefferson County, Pennsylvania, 2013
182 weather alerts in 2013, 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 2013. Tap one for its archive.
- Alerts
- 182
- Warnings
- 50
- Watches
- 23
- Advisories
- 32
- Busiest month
- June33 alerts
- Busiest day
- June 25, 20139 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Jefferson County, 2013
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 29 | 26 | 10% | 30 | 83% | 21 min |
| Flash flood warnings | 5 | 4 | 20% | 7 | 86% | 53 min |
Each office's whole area, 2013
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Pittsburgh, PA: tornado warnings | 15 | 3 | 80% | 5 | 60% | 15 min |
| NWS Pittsburgh, PA: severe thunderstorm warnings | 262 | 223 | 15% | 746 | 84% | 24 min |
| NWS Pittsburgh, PA: flash flood warnings | 48 | 37 | 23% | 127 | 87% | 80 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 4, 8:56 AM EST | Special Weather Statement | PBZ | 49 min |
| Jan 11, 6:33 PM EST | Dense Fog Advisory | PBZ | 16 hr |
| Jan 15, 11:29 AM EST | Winter Weather Advisory | PBZ | 23 hr |
| Jan 17, 10:44 PM EST | Special Weather Statement | PBZ | 76 min |
| Jan 20, 5:16 AM EST | Wind Advisory | PBZ | 6 hr |
| Jan 21, 3:04 AM EST | Wind Chill Advisory | PBZ | 58 hr |
| Jan 21, 4:16 PM EST | Special Weather Statement | PBZ | 59 min |
| Jan 24, 3:18 PM EST | Winter Weather Advisory | PBZ | 27 hr |
| Jan 27, 4:04 AM EST | Winter Storm Warning | PBZ | 33 hr |
| Jan 28, 12:22 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Jan 30, 4:32 AM EST | Flood Watch | PBZ | 23 hr |
| Jan 30, 10:17 AM EST | Special Weather Statement | PBZ | 43 min |
| Jan 30, 10:19 AM EST | Mesoscale Discussion | SPC | 86 min |
| Jan 30, 11:00 AM EST | Special Weather Statement | PBZ | 30 min |
| Jan 30, 3:14 PM EST | Wind Advisory | PBZ | 18 hr |
| Feb 1, 3:32 PM EST | Winter Weather Advisory | PBZ | 55 hr |
| Feb 7, 2:30 PM EST | Winter Weather Advisory | PBZ | 43 hr |
| Feb 10, 2:40 PM EST | Freezing Rain Advisory | PBZ | 13 hr |
| Feb 11, 3:54 AM EST | Wind Advisory | PBZ | 28 hr |
| Feb 18, 2:53 PM EST | Winter Weather Advisory | PBZ | 12 hr |
| Feb 18, 11:52 PM EST | Wind Advisory | PBZ | 11 hr |
| Feb 20, 1:25 PM EST | Special Weather Statement | PBZ | 3 hr |
| Feb 21, 3:03 PM EST | Winter Weather Advisory | PBZ | 31 hr |
| Feb 25, 1:55 PM EST | Winter Weather Advisory | PBZ | 35 hr |
| Mar 16, 8:47 AM EDT | Special Weather Statement | PBZ | 58 min |
| Mar 16, 9:58 AM EDT | Special Weather Statement | PBZ | 47 min |
| Mar 16, 10:47 AM EDT | Special Weather Statement | PBZ | 88 min |
| Mar 16, 12:16 PM EDT | Special Weather Statement | PBZ | 59 min |
| Mar 17, 3:27 AM EDT | Winter Storm Warning | PBZ | 39 hr |
| Mar 17, 3:27 AM EDT | Winter Weather Advisory | PBZ | 35 hr |
| Mar 18, 3:44 PM EDT | Winter Weather Advisory | PBZ | 6 hr |
| Mar 22, 5:11 AM EDT | Winter Weather Advisory | PBZ | 6 hr |
| Mar 23, 8:21 PM EDT | Winter Storm Warning | PBZ | 45 hr |
| Mar 23, 8:21 PM EDT | Winter Weather Advisory | PBZ | 42 hr |
| Mar 25, 5:31 AM EDT | Mesoscale Discussion | SPC | 6 hr |
| Apr 5, 11:21 AM EDT | Red Flag Warning | PBZ | 10 hr |
| Apr 10, 1:33 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Apr 10, 2:07 PM EDT | Severe Thunderstorm Warning | PBZ | 38 min |
| Apr 10, 5:59 PM EDT | Mesoscale Discussion | SPC | 61 min |
| Apr 10, 6:12 PM EDT | Severe Thunderstorm Warning | PBZ | 63 min |
| Apr 10, 6:13 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Apr 10, 6:39 PM EDT | Severe Thunderstorm Warning | PBZ | 51 min |
| Apr 11, 3:53 AM EDT | Flood Watch | PBZ | 24 hr |
| Apr 16, 3:42 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Apr 19, 1:29 PM EDT | Special Weather Statement | PBZ | 61 min |
| May 10, 2:21 PM EDT | Mesoscale Discussion | SPC | 54 min |
| May 10, 4:40 PM EDT | Special Weather Statement | PBZ | 65 min |
| May 10, 4:51 PM EDT | Severe Thunderstorm Warning | PBZ | 39 min |
| May 10, 5:11 PM EDT | Mesoscale Discussion | SPC | 94 min |
| May 10, 6:08 PM EDT | Special Weather Statement | PBZ | 37 min |
| May 12, 3:39 AM EDT | Freeze Watch | PBZ | 34 hr |
| May 12, 2:31 PM EDT | Freeze Warning | PBZ | 18 hr |
| May 13, 1:43 PM EDT | Freeze Warning | PBZ | 18 hr |
| May 22, 2:27 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 22, 4:38 PM EDT | Special Weather Statement | PBZ | 37 min |
| May 23, 10:57 AM EDT | Mesoscale Discussion | SPC | 3 hr |
| May 24, 3:41 AM EDT | Freeze Warning | PBZ | 28 hr |
| May 25, 3:50 AM EDT | Freeze Warning | PBZ | 28 hr |
| May 25, 3:04 PM EDT | Freeze Watch | PBZ | 23 hr |
| May 26, 1:52 PM EDT | Frost Advisory | PBZ | 18 hr |
| May 28, 8:42 PM EDT | Mesoscale Discussion | SPC | 93 min |
| May 29, 11:38 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 12, 4:10 AM EDT | Flash Flood Watch | PBZ | 37 hr |
| Jun 12, 11:53 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 13, 2:40 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 13, 4:43 AM EDT | Severe Thunderstorm Warning | PBZ | 77 min |
| Jun 13, 5:27 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 25, 11:59 AM EDT | Special Weather Statement | PBZ | 16 min |
| Jun 25, 12:22 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 25, 3:04 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Jun 25, 3:37 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 25, 5:06 PM EDT | Special Weather Statement | PBZ | 39 min |
| Jun 25, 5:27 PM EDT | Mesoscale Discussion | SPC | 93 min |
| Jun 25, 5:47 PM EDT | Severe Thunderstorm Warning | PBZ | 73 min |
| Jun 25, 5:50 PM EDT | Severe Thunderstorm Warning | PBZ | 40 min |
| Jun 25, 6:23 PM EDT | Severe Thunderstorm Warning | PBZ | 82 min |
| Jun 25, 11:01 PM EDT | Special Weather Statement | PBZ | 59 min |
| Jun 26, 11:34 AM EDT | Flash Flood Watch | PBZ | 14 hr |
| Jun 27, 8:50 AM EDT | Flood Watch | PBZ | 9 hr |
| Jun 27, 9:09 AM EDT | Special Weather Statement | PBZ | 51 min |
| Jun 27, 9:34 AM EDT | Areal Flood Warning | PBZ | 3 hr |
| Jun 27, 12:32 PM EDT | Areal Flood Warning | PBZ | 33 hr |
| Jun 27, 12:59 PM EDT | Flash Flood Warning | PBZ | 3 hr |
| Jun 28, 1:02 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Jun 28, 2:47 PM EDT | Special Weather Statement | PBZ | 43 min |
| Jun 28, 2:50 PM EDT | Severe Thunderstorm Warning | PBZ | 55 min |
| Jun 28, 2:55 PM EDT | Flash Flood Warning | PBZ | 3 hr |
| Jun 28, 3:30 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 28, 9:37 PM EDT | Areal Flood Warning | PBZ | 18 hr |
| Jun 29, 7:26 PM EDT | Areal Flood Advisory | PBZ | 3 hr |
| Jun 29, 7:41 PM EDT | Flash Flood Warning | PBZ | 3 hr |
| Jun 30, 2:24 PM EDT | Special Weather Statement | PBZ | 51 min |
| Jun 30, 2:33 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 30, 2:40 PM EDT | Severe Thunderstorm Warning | PBZ | 50 min |
| Jun 30, 3:00 PM EDT | Areal Flood Warning | PBZ | 3 hr |
| Jul 1, 11:17 AM EDT | Areal Flood Advisory | PBZ | 3 hr |
| Jul 1, 11:40 AM EDT | Areal Flood Warning | PBZ | 6 hr |
| Jul 2, 12:01 AM EDT | Areal Flood Warning | PBZ | 3 hr |
| Jul 2, 2:45 PM EDT | Special Weather Statement | PBZ | 75 min |
| Jul 3, 6:52 PM EDT | Special Weather Statement | PBZ | 23 min |
| Jul 4, 5:55 PM EDT | Severe Thunderstorm Warning | PBZ | 50 min |
| Jul 6, 1:46 PM EDT | Flash Flood Watch | PBZ | 27 hr |
| Jul 6, 8:47 PM EDT | Special Weather Statement | PBZ | 58 min |
| Jul 6, 9:41 PM EDT | Special Weather Statement | PBZ | 49 min |
| Jul 6, 9:50 PM EDT | Severe Thunderstorm Warning | PBZ | 25 min |
| Jul 9, 1:03 PM EDT | Flash Flood Watch | PBZ | 31 hr |
| Jul 10, 12:31 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 10, 3:45 PM EDT | Mesoscale Discussion | SPC | 30 min |
| Jul 10, 5:52 PM EDT | Severe Thunderstorm Warning | PBZ | 38 min |
| Jul 10, 6:19 PM EDT | Flash Flood Warning | PBZ | 4 hr |
| Jul 10, 6:26 PM EDT | Severe Thunderstorm Warning | PBZ | 49 min |
| Jul 17, 2:56 PM EDT | Severe Thunderstorm Warning | PBZ | 49 min |
| Jul 17, 2:57 PM EDT | Severe Thunderstorm Warning | PBZ | 33 min |
| Jul 18, 4:48 PM EDT | Severe Thunderstorm Warning | PBZ | 12 min |
| Jul 18, 5:35 PM EDT | Flash Flood Warning | PBZ | 3 hr |
| Jul 18, 5:43 PM EDT | Special Weather Statement | PBZ | 47 min |
| Jul 18, 5:46 PM EDT | Severe Thunderstorm Warning | PBZ | 29 min |
| Jul 18, 6:28 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 20, 5:11 AM EDT | Special Weather Statement | PBZ | 64 min |
| Jul 20, 3:39 PM EDT | Special Weather Statement | PBZ | 21 min |
| Jul 20, 4:20 PM EDT | Special Weather Statement | PBZ | 25 min |
| Jul 23, 1:54 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 23, 4:02 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Jul 27, 5:02 PM EDT | Special Weather Statement | PBZ | 58 min |
| Aug 7, 3:24 PM EDT | Mesoscale Discussion | SPC | 66 min |
| Aug 7, 3:49 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 7, 4:18 PM EDT | Special Weather Statement | PBZ | 42 min |
| Aug 7, 4:29 PM EDT | Severe Thunderstorm Warning | PBZ | 46 min |
| Aug 22, 1:25 PM EDT | Special Weather Statement | PBZ | 35 min |
| Aug 22, 2:03 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 31, 5:26 PM EDT | Special Weather Statement | PBZ | 64 min |
| Aug 31, 6:02 PM EDT | Severe Thunderstorm Warning | PBZ | 43 min |
| Aug 31, 10:05 PM EDT | Special Weather Statement | PBZ | 70 min |
| Aug 31, 10:53 PM EDT | Areal Flood Advisory | PBZ | 3 hr |
| Sep 2, 12:33 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Sep 2, 1:24 PM EDT | Special Weather Statement | PBZ | 36 min |
| Sep 2, 1:42 PM EDT | Severe Thunderstorm Warning | PBZ | 33 min |
| Sep 2, 3:18 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Sep 2, 4:51 PM EDT | Special Weather Statement | PBZ | 39 min |
| Sep 2, 5:01 PM EDT | Special Weather Statement | PBZ | 44 min |
| Sep 2, 5:09 PM EDT | Severe Thunderstorm Warning | PBZ | 51 min |
| Sep 2, 6:52 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Sep 11, 11:42 AM EDT | Mesoscale Discussion | SPC | 63 min |
| Sep 11, 12:33 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Sep 11, 2:47 PM EDT | Mesoscale Discussion | SPC | 58 min |
| Sep 12, 12:12 PM EDT | Severe Thunderstorm Warning | PBZ | 48 min |
| Sep 12, 12:29 PM EDT | Severe Thunderstorm Warning | PBZ | 46 min |
| Sep 17, 11:55 AM EDT | Frost Advisory | PBZ | 17 hr |
| Sep 23, 2:49 PM EDT | Frost Advisory | PBZ | 18 hr |
| Nov 1, 12:46 AM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Nov 1, 3:37 AM EDT | Mesoscale Discussion | SPC | 83 min |
| Nov 1, 4:11 AM EDT | Severe Thunderstorm Warning | PBZ | 34 min |
| Nov 12, 7:50 PM EST | Special Weather Statement | PBZ | 115 min |
| Nov 17, 4:00 AM EST | Wind Advisory | PBZ | 31 hr |
| Nov 17, 7:36 PM EST | Mesoscale Discussion | SPC | 54 min |
| Nov 17, 8:23 PM EST | Severe Thunderstorm Watch | SPC | 4 hr |
| Nov 17, 9:46 PM EST | High Wind Warning | PBZ | 5 hr |
| Nov 17, 9:46 PM EST | Wind Advisory | PBZ | 14 hr |
| Nov 17, 10:01 PM EST | Severe Thunderstorm Warning | PBZ | 74 min |
| Nov 17, 10:19 PM EST | Severe Thunderstorm Warning | PBZ | 56 min |
| Nov 17, 10:24 PM EST | Mesoscale Discussion | SPC | 66 min |
| Nov 22, 1:59 PM EST | Winter Weather Advisory | PBZ | 53 hr |
| Nov 23, 1:47 PM EST | Special Weather Statement | PBZ | 43 min |
| Nov 23, 3:44 PM EST | Special Weather Statement | PBZ | 61 min |
| Nov 24, 3:12 PM EST | Winter Storm Watch | PBZ | 24 hr |
| Nov 25, 3:29 PM EST | Winter Storm Warning | PBZ | 60 hr |
| Nov 27, 11:07 AM EST | Winter Weather Advisory | PBZ | 16 hr |
| Dec 5, 4:01 PM EST | Winter Weather Advisory | PBZ | 32 hr |
| Dec 6, 4:02 PM EST | Mesoscale Discussion | SPC | 3 hr |
| Dec 6, 7:41 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Dec 7, 3:51 PM EST | Winter Weather Advisory | PBZ | 41 hr |
| Dec 13, 2:56 AM EST | Winter Weather Advisory | PBZ | 47 hr |
| Dec 14, 3:02 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Dec 16, 2:33 PM EST | Winter Weather Advisory | PBZ | 14 hr |
| Dec 22, 1:36 AM EST | Severe Thunderstorm Watch | SPC | 3 hr |
| Dec 22, 2:53 AM EST | Severe Thunderstorm Warning | PBZ | 37 min |
| Dec 22, 3:28 AM EST | Severe Thunderstorm Warning | PBZ | 47 min |
| Dec 24, 10:13 AM EST | Special Weather Statement | PBZ | 62 min |
| Dec 24, 2:18 PM EST | Special Weather Statement | PBZ | 72 min |
| Dec 26, 12:43 PM EST | Special Weather Statement | PBZ | 62 min |
| Dec 31, 5:54 AM EST | Special Weather Statement | PBZ | 51 min |
| Dec 31, 11:05 AM EST | Special Weather Statement | PBZ | 85 min |
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 | 29 |
| Severe Thunderstorm Watch | 13 |
| Mesoscale Discussion | 33 |
| Special Weather Statement | 44 |
| Flooding | |
| Areal Flood Warning | 6 |
| Flash Flood Warning | 5 |
| Flash Flood Watch | 4 |
| Flood Watch | 3 |
| Areal Flood Advisory | 3 |
| Winter | |
| Winter Storm Warning | 4 |
| Winter Storm Watch | 1 |
| Freezing Rain Advisory | 1 |
| Winter Weather Advisory | 17 |
| Cold | |
| Freeze Warning | 4 |
| Freeze Watch | 2 |
| Frost Advisory | 3 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| High Wind Warning | 1 |
| Wind Advisory | 6 |
| Fire | |
| Red Flag Warning | 1 |
| 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 archive20122014
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.