Alert archive / Pennsylvania / Butler County
Weather alerts in Butler County, Pennsylvania, 2016
113 weather alerts in 2016, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Butler County and its neighbors
Each county as a circle sized by its count in 2016. Tap one for its archive.
- Alerts
- 113
- Warnings
- 21
- Watches
- 8
- Advisories
- 27
- Busiest month
- July20 alerts
- Busiest day
- July 24, 20168 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
2 of 4 tornado warnings covering Butler County in 2016 had a tornado report inside them; 2 of 2 tornado reports fell inside a warning, on average 3 minutes after it went out.
Butler County, 2016
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 4 | 2 | 50% | 2 | 100% | 3 min |
| Severe thunderstorm warnings | 12 | 10 | 17% | 9 | 44% | 25 min |
| Flash flood warnings | 1 | 1 | 0% | 0 |
Each office's whole area, 2016
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Pittsburgh, PA: tornado warnings | 13 | 4 | 69% | 6 | 67% | 3 min |
| NWS Pittsburgh, PA: severe thunderstorm warnings | 155 | 113 | 27% | 345 | 81% | 20 min |
| NWS Pittsburgh, PA: flash flood warnings | 24 | 16 | 33% | 60 | 85% | 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, 8:12 PM EST | Winter Weather Advisory | PBZ | 5 hr |
| Jan 9, 6:48 AM EST | Special Weather Statement | PBZ | 117 min |
| Jan 10, 3:31 AM EST | Wind Advisory | PBZ | 14 hr |
| Jan 11, 2:37 PM EST | Winter Weather Advisory | PBZ | 40 hr |
| Jan 12, 10:24 AM EST | Special Weather Statement | PBZ | 66 min |
| Jan 12, 11:29 AM EST | Special Weather Statement | PBZ | 91 min |
| Jan 17, 4:04 AM EST | Wind Chill Advisory | PBZ | 57 hr |
| Jan 17, 5:14 PM EST | Special Weather Statement | PBZ | 61 min |
| Jan 20, 4:37 PM EST | Special Weather Statement | PBZ | 83 min |
| Feb 7, 8:26 PM EST | Winter Weather Advisory | PBZ | 4 days |
| Feb 10, 4:32 PM EST | Special Weather Statement | PBZ | 88 min |
| Feb 10, 5:57 PM EST | Special Weather Statement | PBZ | 93 min |
| Feb 11, 12:24 AM EST | Special Weather Statement | PBZ | 111 min |
| Feb 11, 2:10 AM EST | Special Weather Statement | PBZ | 2 hr |
| Feb 12, 3:29 AM EST | Wind Chill Advisory | PBZ | 54 hr |
| Feb 12, 7:26 PM EST | Special Weather Statement | PBZ | 79 min |
| Feb 12, 8:33 PM EST | Special Weather Statement | PBZ | 57 min |
| Feb 13, 8:29 AM EST | Special Weather Statement | PBZ | 61 min |
| Feb 13, 9:51 AM EST | Special Weather Statement | PBZ | 54 min |
| Feb 14, 3:45 PM EST | Winter Weather Advisory | PBZ | 45 hr |
| Feb 24, 12:33 PM EST | Special Weather Statement | PBZ | 3 hr |
| Feb 29, 2:12 AM EST | Wind Advisory | PBZ | 7 hr |
| Mar 1, 3:34 AM EST | Wind Advisory | PBZ | 27 hr |
| Mar 2, 8:05 AM EST | Special Weather Statement | PBZ | 40 min |
| Mar 2, 8:46 AM EST | Special Weather Statement | PBZ | 44 min |
| Mar 17, 10:31 AM EDT | Red Flag Warning | PBZ | 9 hr |
| Apr 2, 2:07 AM EDT | Wind Advisory | PBZ | 26 hr |
| Apr 5, 5:39 AM EDT | Special Weather Statement | PBZ | 51 min |
| Apr 8, 3:33 AM EDT | Winter Weather Advisory | PBZ | 39 hr |
| Apr 26, 5:23 AM EDT | Special Weather Statement | PBZ | 52 min |
| Apr 26, 1:54 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 2, 3:58 AM EDT | Severe Thunderstorm Warning | PBZ | 32 min |
| May 7, 10:37 PM EDT | Special Weather Statement | PBZ | 23 min |
| May 15, 2:22 AM EDT | Freeze Watch | PBZ | 12 hr |
| May 15, 2:18 PM EDT | Freeze Warning | PBZ | 18 hr |
| Jun 2, 9:37 PM EDT | Special Weather Statement | PBZ | 23 min |
| Jun 5, 4:33 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Jun 6, 11:41 AM EDT | Mesoscale Discussion | SPC | 64 min |
| Jun 6, 3:11 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 6, 6:02 PM EDT | Special Weather Statement | PBZ | 43 min |
| Jun 11, 2:32 PM EDT | Mesoscale Discussion | SPC | 58 min |
| Jun 11, 5:21 PM EDT | Special Weather Statement | PBZ | 24 min |
| Jun 11, 5:52 PM EDT | Special Weather Statement | PBZ | 23 min |
| Jun 16, 9:56 AM EDT | Special Weather Statement | PBZ | 49 min |
| Jun 16, 1:58 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 16, 3:55 PM EDT | Flash Flood Watch | PBZ | 11 hr |
| Jul 7, 6:01 PM EDT | Special Weather Statement | PBZ | 29 min |
| Jul 13, 11:36 PM EDT | Special Weather Statement | PBZ | 39 min |
| Jul 14, 12:15 AM EDT | Special Weather Statement | PBZ | 45 min |
| Jul 16, 5:10 PM EDT | Special Weather Statement | PBZ | 20 min |
| Jul 16, 5:27 PM EDT | Special Weather Statement | PBZ | 33 min |
| Jul 16, 5:53 PM EDT | Severe Thunderstorm Warning | PBZ | 52 min |
| Jul 22, 8:34 AM EDT | Special Weather Statement | PBZ | 26 min |
| Jul 22, 9:21 AM EDT | Special Weather Statement | PBZ | 39 min |
| Jul 22, 10:00 AM EDT | Special Weather Statement | PBZ | 45 min |
| Jul 24, 1:03 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 24, 2:47 PM EDT | Severe Thunderstorm Warning | PBZ | 28 min |
| Jul 24, 2:59 PM EDT | Severe Thunderstorm Warning | PBZ | 46 min |
| Jul 24, 3:14 PM EDT | Severe Thunderstorm Warning | PBZ | 46 min |
| Jul 24, 3:42 PM EDT | Severe Thunderstorm Warning | PBZ | 48 min |
| Jul 24, 3:58 PM EDT | Severe Thunderstorm Warning | PBZ | 32 min |
| Jul 24, 4:09 PM EDT | Areal Flood Advisory | PBZ | 3 hr |
| Jul 24, 4:25 PM EDT | Severe Thunderstorm Warning | PBZ | 50 min |
| Jul 25, 12:41 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Jul 25, 3:03 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Jul 30, 11:45 AM EDT | Areal Flood Advisory | PBZ | 2 hr |
| Aug 11, 7:03 PM EDT | Flash Flood Warning | PBZ | 3 hr |
| Aug 16, 2:57 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 19, 5:40 PM EDT | Special Weather Statement | PBZ | 35 min |
| Aug 19, 5:48 PM EDT | Areal Flood Advisory | PBZ | 117 min |
| Aug 19, 6:17 PM EDT | Special Weather Statement | PBZ | 13 min |
| Aug 25, 5:42 PM EDT | Mesoscale Discussion | SPC | 93 min |
| Aug 25, 9:43 PM EDT | Tornado Warning | PBZ | 18 min |
| Aug 25, 10:25 PM EDT | Severe Thunderstorm Warning | PBZ | 50 min |
| Sep 8, 5:48 PM EDT | Severe Thunderstorm Warning | PBZ | 42 min |
| Sep 8, 6:43 PM EDT | Special Weather Statement | PBZ | 32 min |
| Sep 8, 9:15 PM EDT | Areal Flood Advisory | PBZ | 3 hr |
| Sep 8, 11:05 PM EDT | Areal Flood Warning | PBZ | 115 min |
| Sep 10, 3:30 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Sep 10, 8:06 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Sep 10, 8:45 PM EDT | Special Weather Statement | PBZ | 60 min |
| Sep 17, 4:23 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 17, 5:49 PM EDT | Severe Thunderstorm Warning | PBZ | 26 min |
| Sep 17, 6:01 PM EDT | Tornado Warning | PBZ | 29 min |
| Sep 17, 6:25 PM EDT | Tornado Warning | PBZ | 35 min |
| Sep 17, 6:55 PM EDT | Mesoscale Discussion | SPC | 65 min |
| Sep 17, 7:17 PM EDT | Severe Thunderstorm Warning | PBZ | 28 min |
| Sep 17, 7:38 PM EDT | Tornado Warning | PBZ | 37 min |
| Oct 1, 4:01 PM EDT | Special Weather Statement | PBZ | 44 min |
| Oct 3, 12:39 AM EDT | Dense Fog Advisory | PBZ | 9 hr |
| Oct 4, 12:46 AM EDT | Dense Fog Advisory | PBZ | 9 hr |
| Oct 10, 10:15 AM EDT | Frost Advisory | PBZ | 23 hr |
| Oct 13, 2:16 PM EDT | Frost Advisory | PBZ | 19 hr |
| Oct 20, 11:45 AM EDT | Flash Flood Watch | PBZ | 21 hr |
| Oct 20, 2:28 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Oct 20, 3:46 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Oct 30, 10:29 AM EDT | Special Weather Statement | PBZ | 46 min |
| Oct 30, 12:37 PM EDT | Special Weather Statement | PBZ | 38 min |
| Nov 17, 3:18 AM EST | Dense Fog Advisory | PBZ | 7 hr |
| Nov 18, 3:01 PM EST | Lake Effect Snow Advisory | PBZ | 61 hr |
| Dec 10, 1:37 PM EST | Winter Weather Advisory | PBZ | 39 hr |
| Dec 11, 10:05 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Dec 13, 1:43 PM EST | Winter Weather Advisory | PBZ | 8 hr |
| Dec 14, 10:28 AM EST | Wind Chill Advisory | PBZ | 47 hr |
| Dec 14, 2:49 PM EST | Winter Weather Advisory | PBZ | 23 hr |
| Dec 15, 2:27 PM EST | Winter Storm Watch | PBZ | 15 hr |
| Dec 16, 5:05 AM EST | Winter Storm Warning | PBZ | 35 hr |
| Dec 17, 3:08 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Dec 18, 4:26 AM EST | Special Weather Statement | PBZ | 3 hr |
| Dec 18, 6:23 AM EST | Winter Weather Advisory | PBZ | 6 hr |
| Dec 29, 7:46 AM EST | Winter Weather Advisory | PBZ | 35 hr |
| Dec 29, 8:47 PM EST | Special Weather Statement | PBZ | 118 min |
| Dec 29, 10:25 PM EST | Special Weather Statement | PBZ | 2 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 | 12 |
| Tornado Warning | 4 |
| Severe Thunderstorm Watch | 4 |
| Mesoscale Discussion | 15 |
| Special Weather Statement | 42 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flash Flood Warning | 1 |
| Flash Flood Watch | 2 |
| Areal Flood Advisory | 4 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 1 |
| Lake Effect Snow Advisory | 1 |
| Winter Weather Advisory | 10 |
| Cold | |
| Freeze Warning | 1 |
| Freeze Watch | 1 |
| Frost Advisory | 2 |
| Wind Chill Advisory | 3 |
| Wind and dust | |
| Wind Advisory | 4 |
| Fire | |
| Red Flag Warning | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 3 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20152017
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.