Alert archive / Pennsylvania / Clarion County

Weather alerts in Clarion County, Pennsylvania, 2018

104 weather alerts in 2018, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Clarion County and its neighbors

Each county as a circle sized by its count in 2018. Tap one for its archive.

Alerts
104
Warnings
41
Watches
12
Advisories
23
Busiest month
June17 alerts
Busiest day
January 12, 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.

0 of 4 tornado warnings covering Clarion County in 2018 had a tornado report inside them.

Clarion County, 2018

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings40100%0
Severe thunderstorm warnings18176%14100%15 min
Flash flood warnings5420%5100%33 min

Each office's whole area, 2018

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Pittsburgh, PA: tornado warnings21481%1443%12 min
NWS Pittsburgh, PA: severe thunderstorm warnings20715426%41680%19 min
NWS Pittsburgh, PA: flash flood warnings795432%20484%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.

IssuedProductOfficeLasted
Jan 3, 3:42 PM ESTWind Chill AdvisoryPBZ4 days
Jan 7, 2:08 PM ESTWinter Weather AdvisoryPBZ36 hr
Jan 11, 3:07 AM ESTWinter Storm WatchPBZ12 hr
Jan 11, 12:45 PM ESTFlood WatchPBZ32 hr
Jan 11, 3:06 PM ESTWinter Storm WarningPBZ43 hr
Jan 12, 1:03 AM ESTAreal Flood AdvisoryPBZ8 hr
Jan 12, 2:38 AM ESTAreal Flood WarningPBZ12 hr
Jan 12, 9:30 AM ESTRiver Flood WarningPBZ18 hr
Jan 12, 9:40 AM ESTRiver Flood WarningPBZ22 hr
Jan 12, 2:30 PM ESTAreal Flood WarningPBZ3 hr
Jan 12, 5:21 PM ESTAreal Flood WarningPBZ18 hr
Jan 12, 7:04 PM ESTMesoscale DiscussionSPC6 hr
Jan 12, 11:47 PM ESTRiver Flood WarningPBZ13 hr
Jan 23, 2:59 AM ESTSpecial Weather StatementPBZ61 min
Jan 29, 3:58 AM ESTWinter Weather AdvisoryPBZ39 hr
Feb 2, 12:01 PM ESTSpecial Weather StatementPBZ74 min
Feb 3, 3:18 PM ESTWinter Weather AdvisoryPBZ24 hr
Feb 4, 10:16 PM ESTSpecial Weather StatementPBZ119 min
Feb 6, 2:56 AM ESTWinter Weather AdvisoryPBZ34 hr
Feb 6, 3:25 PM ESTWinter Storm WarningPBZ24 hr
Feb 7, 5:28 AM ESTMesoscale DiscussionSPC5 hr
Feb 10, 7:59 AM ESTSpecial Weather StatementPBZ61 min
Feb 19, 5:44 PM ESTAreal Flood AdvisoryPBZ3 hr
Feb 21, 2:48 PM ESTWinter Weather AdvisoryPBZ22 hr
Feb 22, 3:15 AM ESTFlood WatchPBZ3 days
Mar 1, 10:10 AM ESTHigh Wind WatchPBZ5 hr
Mar 1, 10:10 AM ESTHigh Wind WarningPBZ28 hr
Mar 6, 3:51 PM ESTWinter Weather AdvisoryPBZ29 hr
Mar 7, 6:45 AM ESTSpecial Weather StatementPBZ2 hr
Mar 8, 3:29 AM ESTWinter Weather AdvisoryPBZ34 hr
Mar 15, 9:29 AM EDTSpecial Weather StatementPBZ76 min
Mar 15, 10:02 AM EDTSnow Squall WarningPBZ43 min
Mar 15, 10:44 AM EDTSnow Squall WarningPBZ46 min
Mar 20, 12:06 PM EDTWinter Weather AdvisoryPBZ32 hr
Mar 21, 4:16 AM EDTSpecial Weather StatementPBZ59 min
Mar 28, 11:36 PM EDTDense Fog AdvisoryPBZ7 hr
Apr 1, 1:32 PM EDTWinter Weather AdvisoryPBZ17 hr
Apr 3, 1:58 PM EDTWind AdvisoryPBZ30 hr
Apr 3, 6:38 PM EDTMesoscale DiscussionSPC2 hr
Apr 7, 12:44 AM EDTSpecial Weather StatementPBZ61 min
Apr 13, 10:53 AM EDTRiver Flood WatchPBZ47 hr
Apr 27, 7:03 PM EDTSpecial Weather StatementPBZ42 min
May 3, 3:45 PM EDTSpecial Weather StatementPBZ30 min
May 3, 4:00 PM EDTSpecial Weather StatementPBZ60 min
May 4, 2:23 PM EDTMesoscale DiscussionSPC97 min
May 4, 2:44 PM EDTSevere Thunderstorm WatchSPC6 hr
May 4, 4:10 PM EDTSevere Thunderstorm WarningPBZ50 min
May 4, 4:20 PM EDTMesoscale DiscussionSPC55 min
May 4, 4:26 PM EDTSevere Thunderstorm WarningPBZ34 min
May 15, 11:43 AM EDTMesoscale DiscussionSPC3 hr
May 15, 11:56 AM EDTSevere Thunderstorm WarningPBZ34 min
May 15, 12:23 PM EDTSevere Thunderstorm WarningPBZ52 min
May 22, 6:36 PM EDTMesoscale DiscussionSPC114 min
May 29, 7:04 PM EDTSpecial Weather StatementPBZ26 min
May 31, 8:12 PM EDTAreal Flood AdvisoryPBZ2 hr
May 31, 8:26 PM EDTFlash Flood WarningPBZ2 hr
Jun 5, 3:05 PM EDTMesoscale DiscussionSPC2 hr
Jun 13, 6:10 PM EDTMesoscale DiscussionSPC95 min
Jun 13, 6:33 PM EDTSevere Thunderstorm WatchSPC4 hr
Jun 13, 6:53 PM EDTSevere Thunderstorm WarningPBZ52 min
Jun 13, 7:06 PM EDTTornado WarningPBZ24 min
Jun 13, 8:43 PM EDTMesoscale DiscussionSPC62 min
Jun 18, 3:11 PM EDTSpecial Weather StatementPBZ34 min
Jun 18, 3:19 PM EDTSevere Thunderstorm WarningPBZ26 min
Jun 18, 3:45 PM EDTSevere Thunderstorm WarningPBZ45 min
Jun 18, 8:20 PM EDTSevere Thunderstorm WarningPBZ40 min
Jun 18, 9:00 PM EDTSevere Thunderstorm WarningPBZ60 min
Jun 18, 9:27 PM EDTSevere Thunderstorm WarningPBZ63 min
Jun 18, 9:57 PM EDTSevere Thunderstorm WarningPBZ33 min
Jun 18, 10:26 PM EDTSevere Thunderstorm WarningPBZ34 min
Jun 18, 10:30 PM EDTSevere Thunderstorm WarningPBZ45 min
Jul 2, 6:06 PM EDTSevere Thunderstorm WarningPBZ24 min
Jul 2, 6:40 PM EDTFlash Flood WarningPBZ2 hr
Jul 2, 7:09 PM EDTFlash Flood WarningPBZ2 hr
Jul 5, 4:10 AM EDTFlash Flood WatchPBZ19 hr
Jul 5, 3:03 PM EDTAreal Flood AdvisoryPBZ73 min
Aug 3, 9:45 AM EDTFlash Flood WarningPBZ2 hr
Aug 4, 6:55 AM EDTDense Fog AdvisoryPBZ2 hr
Aug 21, 2:16 PM EDTMesoscale DiscussionSPC119 min
Aug 21, 2:35 PM EDTTornado WarningPBZ25 min
Aug 21, 2:41 PM EDTSevere Thunderstorm WatchSPC7 hr
Aug 21, 7:13 PM EDTFlash Flood WarningPBZ3 hr
Aug 29, 6:02 PM EDTSevere Thunderstorm WarningPBZ43 min
Aug 29, 6:40 PM EDTSevere Thunderstorm WarningPBZ35 min
Sep 8, 3:34 AM EDTFlood WatchPBZ49 hr
Sep 9, 4:15 PM EDTAreal Flood WarningPBZ18 hr
Sep 9, 9:48 PM EDTAreal Flood AdvisoryPBZ116 min
Sep 9, 11:44 PM EDTAreal Flood WarningPBZ12 hr
Sep 21, 4:32 PM EDTSevere Thunderstorm WatchSPC4 hr
Sep 21, 6:32 PM EDTSevere Thunderstorm WarningPBZ43 min
Sep 21, 6:53 PM EDTTornado WarningPBZ37 min
Sep 21, 7:04 PM EDTMesoscale DiscussionSPC116 min
Sep 21, 7:14 PM EDTSevere Thunderstorm WarningPBZ46 min
Oct 2, 2:26 PM EDTMesoscale DiscussionSPC2 hr
Oct 2, 2:55 PM EDTTornado WatchSPC8 hr
Oct 2, 4:43 PM EDTMesoscale DiscussionSPC2 hr
Oct 2, 7:24 PM EDTTornado WarningPBZ20 min
Oct 2, 7:24 PM EDTMesoscale DiscussionSPC81 min
Oct 13, 2:18 PM EDTFrost AdvisoryPBZ13 hr
Oct 15, 2:22 PM EDTFrost AdvisoryPBZ13 hr
Nov 14, 2:47 PM ESTWinter Storm WarningPBZ38 hr
Nov 14, 2:47 PM ESTWinter Weather AdvisoryPBZ34 hr
Nov 23, 3:46 AM ESTWinter Weather AdvisoryPBZ32 hr
Nov 27, 2:00 AM ESTWinter Weather AdvisoryPBZ32 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 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.