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

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings4250%2100%3 min
Severe thunderstorm warnings121017%944%25 min
Flash flood warnings110%0

Each office's whole area, 2016

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Pittsburgh, PA: tornado warnings13469%667%3 min
NWS Pittsburgh, PA: severe thunderstorm warnings15511327%34581%20 min
NWS Pittsburgh, PA: flash flood warnings241633%6085%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.

IssuedProductOfficeLasted
Dec 31, 8:12 PM ESTWinter Weather AdvisoryPBZ5 hr
Jan 9, 6:48 AM ESTSpecial Weather StatementPBZ117 min
Jan 10, 3:31 AM ESTWind AdvisoryPBZ14 hr
Jan 11, 2:37 PM ESTWinter Weather AdvisoryPBZ40 hr
Jan 12, 10:24 AM ESTSpecial Weather StatementPBZ66 min
Jan 12, 11:29 AM ESTSpecial Weather StatementPBZ91 min
Jan 17, 4:04 AM ESTWind Chill AdvisoryPBZ57 hr
Jan 17, 5:14 PM ESTSpecial Weather StatementPBZ61 min
Jan 20, 4:37 PM ESTSpecial Weather StatementPBZ83 min
Feb 7, 8:26 PM ESTWinter Weather AdvisoryPBZ4 days
Feb 10, 4:32 PM ESTSpecial Weather StatementPBZ88 min
Feb 10, 5:57 PM ESTSpecial Weather StatementPBZ93 min
Feb 11, 12:24 AM ESTSpecial Weather StatementPBZ111 min
Feb 11, 2:10 AM ESTSpecial Weather StatementPBZ2 hr
Feb 12, 3:29 AM ESTWind Chill AdvisoryPBZ54 hr
Feb 12, 7:26 PM ESTSpecial Weather StatementPBZ79 min
Feb 12, 8:33 PM ESTSpecial Weather StatementPBZ57 min
Feb 13, 8:29 AM ESTSpecial Weather StatementPBZ61 min
Feb 13, 9:51 AM ESTSpecial Weather StatementPBZ54 min
Feb 14, 3:45 PM ESTWinter Weather AdvisoryPBZ45 hr
Feb 24, 12:33 PM ESTSpecial Weather StatementPBZ3 hr
Feb 29, 2:12 AM ESTWind AdvisoryPBZ7 hr
Mar 1, 3:34 AM ESTWind AdvisoryPBZ27 hr
Mar 2, 8:05 AM ESTSpecial Weather StatementPBZ40 min
Mar 2, 8:46 AM ESTSpecial Weather StatementPBZ44 min
Mar 17, 10:31 AM EDTRed Flag WarningPBZ9 hr
Apr 2, 2:07 AM EDTWind AdvisoryPBZ26 hr
Apr 5, 5:39 AM EDTSpecial Weather StatementPBZ51 min
Apr 8, 3:33 AM EDTWinter Weather AdvisoryPBZ39 hr
Apr 26, 5:23 AM EDTSpecial Weather StatementPBZ52 min
Apr 26, 1:54 PM EDTSevere Thunderstorm WatchSPC6 hr
May 2, 3:58 AM EDTSevere Thunderstorm WarningPBZ32 min
May 7, 10:37 PM EDTSpecial Weather StatementPBZ23 min
May 15, 2:22 AM EDTFreeze WatchPBZ12 hr
May 15, 2:18 PM EDTFreeze WarningPBZ18 hr
Jun 2, 9:37 PM EDTSpecial Weather StatementPBZ23 min
Jun 5, 4:33 PM EDTMesoscale DiscussionSPC87 min
Jun 6, 11:41 AM EDTMesoscale DiscussionSPC64 min
Jun 6, 3:11 PM EDTMesoscale DiscussionSPC3 hr
Jun 6, 6:02 PM EDTSpecial Weather StatementPBZ43 min
Jun 11, 2:32 PM EDTMesoscale DiscussionSPC58 min
Jun 11, 5:21 PM EDTSpecial Weather StatementPBZ24 min
Jun 11, 5:52 PM EDTSpecial Weather StatementPBZ23 min
Jun 16, 9:56 AM EDTSpecial Weather StatementPBZ49 min
Jun 16, 1:58 PM EDTSevere Thunderstorm WatchSPC8 hr
Jun 16, 3:55 PM EDTFlash Flood WatchPBZ11 hr
Jul 7, 6:01 PM EDTSpecial Weather StatementPBZ29 min
Jul 13, 11:36 PM EDTSpecial Weather StatementPBZ39 min
Jul 14, 12:15 AM EDTSpecial Weather StatementPBZ45 min
Jul 16, 5:10 PM EDTSpecial Weather StatementPBZ20 min
Jul 16, 5:27 PM EDTSpecial Weather StatementPBZ33 min
Jul 16, 5:53 PM EDTSevere Thunderstorm WarningPBZ52 min
Jul 22, 8:34 AM EDTSpecial Weather StatementPBZ26 min
Jul 22, 9:21 AM EDTSpecial Weather StatementPBZ39 min
Jul 22, 10:00 AM EDTSpecial Weather StatementPBZ45 min
Jul 24, 1:03 PM EDTMesoscale DiscussionSPC2 hr
Jul 24, 2:47 PM EDTSevere Thunderstorm WarningPBZ28 min
Jul 24, 2:59 PM EDTSevere Thunderstorm WarningPBZ46 min
Jul 24, 3:14 PM EDTSevere Thunderstorm WarningPBZ46 min
Jul 24, 3:42 PM EDTSevere Thunderstorm WarningPBZ48 min
Jul 24, 3:58 PM EDTSevere Thunderstorm WarningPBZ32 min
Jul 24, 4:09 PM EDTAreal Flood AdvisoryPBZ3 hr
Jul 24, 4:25 PM EDTSevere Thunderstorm WarningPBZ50 min
Jul 25, 12:41 PM EDTMesoscale DiscussionSPC64 min
Jul 25, 3:03 PM EDTMesoscale DiscussionSPC57 min
Jul 30, 11:45 AM EDTAreal Flood AdvisoryPBZ2 hr
Aug 11, 7:03 PM EDTFlash Flood WarningPBZ3 hr
Aug 16, 2:57 PM EDTMesoscale DiscussionSPC2 hr
Aug 19, 5:40 PM EDTSpecial Weather StatementPBZ35 min
Aug 19, 5:48 PM EDTAreal Flood AdvisoryPBZ117 min
Aug 19, 6:17 PM EDTSpecial Weather StatementPBZ13 min
Aug 25, 5:42 PM EDTMesoscale DiscussionSPC93 min
Aug 25, 9:43 PM EDTTornado WarningPBZ18 min
Aug 25, 10:25 PM EDTSevere Thunderstorm WarningPBZ50 min
Sep 8, 5:48 PM EDTSevere Thunderstorm WarningPBZ42 min
Sep 8, 6:43 PM EDTSpecial Weather StatementPBZ32 min
Sep 8, 9:15 PM EDTAreal Flood AdvisoryPBZ3 hr
Sep 8, 11:05 PM EDTAreal Flood WarningPBZ115 min
Sep 10, 3:30 PM EDTSevere Thunderstorm WatchSPC6 hr
Sep 10, 8:06 PM EDTMesoscale DiscussionSPC84 min
Sep 10, 8:45 PM EDTSpecial Weather StatementPBZ60 min
Sep 17, 4:23 PM EDTMesoscale DiscussionSPC2 hr
Sep 17, 5:49 PM EDTSevere Thunderstorm WarningPBZ26 min
Sep 17, 6:01 PM EDTTornado WarningPBZ29 min
Sep 17, 6:25 PM EDTTornado WarningPBZ35 min
Sep 17, 6:55 PM EDTMesoscale DiscussionSPC65 min
Sep 17, 7:17 PM EDTSevere Thunderstorm WarningPBZ28 min
Sep 17, 7:38 PM EDTTornado Warning Tornado observedPBZ37 min
Oct 1, 4:01 PM EDTSpecial Weather StatementPBZ44 min
Oct 3, 12:39 AM EDTDense Fog AdvisoryPBZ9 hr
Oct 4, 12:46 AM EDTDense Fog AdvisoryPBZ9 hr
Oct 10, 10:15 AM EDTFrost AdvisoryPBZ23 hr
Oct 13, 2:16 PM EDTFrost AdvisoryPBZ19 hr
Oct 20, 11:45 AM EDTFlash Flood WatchPBZ21 hr
Oct 20, 2:28 PM EDTMesoscale DiscussionSPC3 hr
Oct 20, 3:46 PM EDTSevere Thunderstorm WatchSPC7 hr
Oct 30, 10:29 AM EDTSpecial Weather StatementPBZ46 min
Oct 30, 12:37 PM EDTSpecial Weather StatementPBZ38 min
Nov 17, 3:18 AM ESTDense Fog AdvisoryPBZ7 hr
Nov 18, 3:01 PM ESTLake Effect Snow AdvisoryPBZ61 hr
Dec 10, 1:37 PM ESTWinter Weather AdvisoryPBZ39 hr
Dec 11, 10:05 PM ESTMesoscale DiscussionSPC4 hr
Dec 13, 1:43 PM ESTWinter Weather AdvisoryPBZ8 hr
Dec 14, 10:28 AM ESTWind Chill AdvisoryPBZ47 hr
Dec 14, 2:49 PM ESTWinter Weather AdvisoryPBZ23 hr
Dec 15, 2:27 PM ESTWinter Storm WatchPBZ15 hr
Dec 16, 5:05 AM ESTWinter Storm WarningPBZ35 hr
Dec 17, 3:08 AM ESTMesoscale DiscussionSPC4 hr
Dec 18, 4:26 AM ESTSpecial Weather StatementPBZ3 hr
Dec 18, 6:23 AM ESTWinter Weather AdvisoryPBZ6 hr
Dec 29, 7:46 AM ESTWinter Weather AdvisoryPBZ35 hr
Dec 29, 8:47 PM ESTSpecial Weather StatementPBZ118 min
Dec 29, 10:25 PM ESTSpecial Weather StatementPBZ2 hr

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 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.