Alert archive / Pennsylvania / Butler County
Weather alerts in Butler County, Pennsylvania, 2018
115 weather alerts in 2018, 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 2018. Tap one for its archive.
- Alerts
- 115
- Warnings
- 39
- Watches
- 14
- Advisories
- 22
- Busiest month
- May18 alerts
- Busiest day
- May 4, 20186 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Butler County, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 22 | 17 | 23% | 14 | 86% | 22 min |
| Flash flood warnings | 4 | 3 | 25% | 1 | 100% | 67 min |
Each office's whole area, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Pittsburgh, PA: tornado warnings | 21 | 4 | 81% | 14 | 43% | 12 min |
| NWS Pittsburgh, PA: severe thunderstorm warnings | 207 | 154 | 26% | 416 | 80% | 19 min |
| NWS Pittsburgh, PA: flash flood warnings | 79 | 54 | 32% | 204 | 84% | 62 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, 3:42 PM EST | Wind Chill Advisory | PBZ | 4 days |
| Jan 7, 2:08 PM EST | Winter Weather Advisory | PBZ | 36 hr |
| Jan 11, 3:07 AM EST | Winter Storm Watch | PBZ | 12 hr |
| Jan 11, 12:45 PM EST | Flood Watch | PBZ | 32 hr |
| Jan 11, 3:06 PM EST | Winter Storm Warning | PBZ | 43 hr |
| Jan 12, 1:03 AM EST | Areal Flood Advisory | PBZ | 8 hr |
| Jan 12, 2:38 AM EST | Areal Flood Warning | PBZ | 12 hr |
| Jan 12, 2:30 PM EST | Areal Flood Warning | PBZ | 3 hr |
| Jan 12, 5:21 PM EST | Areal Flood Warning | PBZ | 18 hr |
| Jan 12, 7:04 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Jan 13, 11:15 AM EST | Areal Flood Warning | PBZ | 6 hr |
| Jan 23, 2:16 AM EST | Special Weather Statement | PBZ | 44 min |
| Jan 25, 6:10 AM EST | Special Weather Statement | PBZ | 35 min |
| Jan 30, 8:22 AM EST | Special Weather Statement | PBZ | 53 min |
| Jan 30, 9:27 AM EST | Special Weather Statement | PBZ | 63 min |
| Jan 30, 10:40 AM EST | Special Weather Statement | PBZ | 65 min |
| Jan 30, 11:57 AM EST | Special Weather Statement | PBZ | 63 min |
| Feb 2, 12:01 PM EST | Special Weather Statement | PBZ | 74 min |
| Feb 4, 8:27 PM EST | Special Weather Statement | PBZ | 108 min |
| Feb 4, 10:16 PM EST | Special Weather Statement | PBZ | 119 min |
| Feb 6, 2:56 AM EST | Winter Weather Advisory | PBZ | 34 hr |
| Feb 6, 3:25 PM EST | Winter Storm Warning | PBZ | 24 hr |
| Feb 7, 5:28 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Feb 14, 3:23 PM EST | Flood Watch | PBZ | 51 hr |
| Feb 15, 8:34 PM EST | Areal Flood Warning | PBZ | 17 hr |
| Feb 19, 5:44 PM EST | Areal Flood Advisory | PBZ | 3 hr |
| Feb 21, 2:48 PM EST | Winter Weather Advisory | PBZ | 22 hr |
| Feb 22, 3:15 AM EST | Flood Watch | PBZ | 3 days |
| Feb 23, 10:13 AM EST | Areal Flood Advisory | PBZ | 3 hr |
| Feb 25, 1:03 AM EST | Areal Flood Warning | PBZ | 9 hr |
| Mar 1, 10:10 AM EST | High Wind Watch | PBZ | 5 hr |
| Mar 1, 10:10 AM EST | High Wind Warning | PBZ | 28 hr |
| Mar 7, 6:45 AM EST | Special Weather Statement | PBZ | 2 hr |
| Mar 13, 12:54 PM EDT | Special Weather Statement | PBZ | 66 min |
| Mar 13, 1:56 PM EDT | Special Weather Statement | PBZ | 64 min |
| Mar 15, 9:29 AM EDT | Special Weather Statement | PBZ | 76 min |
| Mar 15, 10:02 AM EDT | Snow Squall Warning | PBZ | 43 min |
| Mar 16, 4:21 AM EDT | Special Weather Statement | PBZ | 54 min |
| Mar 19, 3:19 PM EDT | Winter Weather Advisory | PBZ | 53 hr |
| Mar 20, 12:06 PM EDT | Winter Weather Advisory | PBZ | 32 hr |
| Mar 28, 11:36 PM EDT | Dense Fog Advisory | PBZ | 7 hr |
| Apr 1, 1:32 PM EDT | Winter Weather Advisory | PBZ | 17 hr |
| Apr 3, 1:58 PM EDT | Wind Advisory | PBZ | 30 hr |
| Apr 3, 6:38 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 3, 8:20 PM EDT | Areal Flood Advisory | PBZ | 11 hr |
| Apr 7, 12:44 AM EDT | Special Weather Statement | PBZ | 61 min |
| May 3, 3:13 PM EDT | Special Weather Statement | PBZ | 32 min |
| May 3, 3:45 PM EDT | Special Weather Statement | PBZ | 30 min |
| May 4, 2:23 PM EDT | Mesoscale Discussion | SPC | 97 min |
| May 4, 2:44 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 4, 3:45 PM EDT | Severe Thunderstorm Warning | PBZ | 45 min |
| May 4, 4:20 PM EDT | Mesoscale Discussion | SPC | 55 min |
| May 4, 4:26 PM EDT | Severe Thunderstorm Warning | PBZ | 34 min |
| May 4, 5:51 PM EDT | Severe Thunderstorm Warning | PBZ | 54 min |
| May 12, 2:47 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 12, 5:05 PM EDT | Mesoscale Discussion | SPC | 115 min |
| May 13, 8:04 AM EDT | Severe Thunderstorm Warning | PBZ | 41 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 15, 11:44 AM EDT | Severe Thunderstorm Warning | PBZ | 46 min |
| May 19, 5:35 PM EDT | Severe Thunderstorm Warning | PBZ | 40 min |
| May 22, 1:42 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 22, 3:48 PM EDT | Mesoscale Discussion | SPC | 117 min |
| May 22, 6:36 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Jun 5, 3:03 PM EDT | Severe Thunderstorm Warning | PBZ | 27 min |
| Jun 5, 3:05 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 5, 3:43 PM EDT | Special Weather Statement | PBZ | 32 min |
| Jun 13, 5:28 PM EDT | Special Weather Statement | PBZ | 47 min |
| Jun 13, 5:44 PM EDT | Severe Thunderstorm Warning | PBZ | 46 min |
| Jun 13, 6:05 PM EDT | Severe Thunderstorm Warning | PBZ | 34 min |
| 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 18, 10:30 PM EDT | Severe Thunderstorm Warning | PBZ | 45 min |
| Jul 2, 5:01 PM EDT | Severe Thunderstorm Warning | PBZ | 44 min |
| Jul 2, 5:16 PM EDT | Severe Thunderstorm Warning | PBZ | 29 min |
| Jul 2, 5:41 PM EDT | Severe Thunderstorm Warning | PBZ | 49 min |
| Jul 2, 6:23 PM EDT | Flash Flood Warning | PBZ | 2 hr |
| Jul 2, 6:47 PM EDT | Flash Flood Warning | PBZ | 118 min |
| Jul 3, 2:09 PM EDT | Heat Advisory | PBZ | 29 hr |
| Jul 4, 9:26 PM EDT | Severe Thunderstorm Warning | PBZ | 34 min |
| Jul 5, 4:10 AM EDT | Flash Flood Watch | PBZ | 19 hr |
| Jul 5, 1:02 PM EDT | Special Weather Statement | PBZ | 28 min |
| Jul 5, 1:55 PM EDT | Severe Thunderstorm Warning | PBZ | 35 min |
| Jul 5, 2:00 PM EDT | Severe Thunderstorm Warning | PBZ | 30 min |
| Jul 5, 2:44 PM EDT | Severe Thunderstorm Warning | PBZ | 31 min |
| Jul 15, 2:56 PM EDT | Special Weather Statement | PBZ | 34 min |
| Jul 24, 5:38 PM EDT | Areal Flood Advisory | PBZ | 2 hr |
| Aug 3, 9:45 AM EDT | Flash Flood Warning | PBZ | 2 hr |
| Aug 4, 6:55 AM EDT | Dense Fog Advisory | PBZ | 2 hr |
| Aug 5, 4:03 PM EDT | Severe Thunderstorm Warning | PBZ | 27 min |
| Aug 5, 4:33 PM EDT | Flash Flood Warning | PBZ | 88 min |
| Aug 5, 5:07 PM EDT | Special Weather Statement | PBZ | 23 min |
| Aug 21, 5:29 PM EDT | Special Weather Statement | PBZ | 31 min |
| Aug 29, 6:52 PM EDT | Severe Thunderstorm Warning | PBZ | 53 min |
| Sep 6, 10:49 AM EDT | Special Weather Statement | PBZ | 41 min |
| Sep 8, 3:34 AM EDT | Flood Watch | PBZ | 49 hr |
| Sep 9, 3:00 PM EDT | Areal Flood Warning | PBZ | 18 hr |
| Sep 9, 4:15 PM EDT | Areal Flood Warning | PBZ | 18 hr |
| Sep 9, 9:48 PM EDT | Areal Flood Advisory | PBZ | 116 min |
| Sep 9, 11:44 PM EDT | Areal Flood Warning | PBZ | 12 hr |
| Sep 21, 4:32 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Sep 21, 6:32 PM EDT | Severe Thunderstorm Warning | PBZ | 43 min |
| Sep 21, 7:04 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Sep 21, 7:09 PM EDT | Severe Thunderstorm Warning | PBZ | 51 min |
| Sep 21, 7:14 PM EDT | Severe Thunderstorm Warning | PBZ | 46 min |
| Oct 2, 2:26 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 2, 2:55 PM EDT | Tornado Watch | SPC | 8 hr |
| Oct 2, 4:43 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 2, 7:24 PM EDT | Mesoscale Discussion | SPC | 81 min |
| Oct 15, 2:22 PM EDT | Frost Advisory | PBZ | 13 hr |
| Oct 18, 2:16 PM EDT | Frost Advisory | PBZ | 19 hr |
| Nov 14, 2:47 PM EST | Winter Weather Advisory | PBZ | 34 hr |
| Nov 23, 3:46 AM EST | Winter Weather Advisory | PBZ | 32 hr |
| Nov 29, 6:17 PM EST | Winter Weather Advisory | PBZ | 8 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 | 22 |
| Severe Thunderstorm Watch | 6 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 16 |
| Special Weather Statement | 24 |
| Flooding | |
| Areal Flood Warning | 9 |
| Flash Flood Warning | 4 |
| Flash Flood Watch | 1 |
| Flood Watch | 4 |
| Areal Flood Advisory | 6 |
| Winter | |
| Snow Squall Warning | 1 |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 9 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Frost Advisory | 2 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 1 |
| Wind Advisory | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 2 |
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.