Alert archive / Pennsylvania / Potter County

Weather alerts in Potter County, Pennsylvania, 2017

113 weather alerts in 2017, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Potter County and its neighbors

Each county as a circle sized by its count in 2017. Tap one for its archive.

Alerts
113
Warnings
21
Watches
13
Advisories
33
Busiest month
May20 alerts
Busiest day
August 22, 201710 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 2 tornado warnings covering Potter County in 2017 had a tornado report inside them.

Potter County, 2017

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings20100%0
Severe thunderstorm warnings15847%3100%45 min
Flash flood warnings110%0

Each office's whole area, 2017

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS State College, PA: tornado warnings16475%1040%19 min
NWS State College, PA: severe thunderstorm warnings19012136%34288%32 min
NWS State College, PA: flash flood warnings201525%4584%81 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 1, 3:06 PM ESTFreezing Rain AdvisoryCTP22 hr
Jan 9, 2:41 PM ESTWinter Weather AdvisoryCTP37 hr
Jan 10, 6:13 PM ESTMesoscale DiscussionSPC6 hr
Jan 10, 7:10 PM ESTSpecial Weather StatementCTP35 min
Jan 12, 4:57 AM ESTFlood WatchCTP15 hr
Jan 12, 2:26 PM ESTSpecial Weather StatementCTP49 min
Jan 16, 3:54 AM ESTFreezing Rain AdvisoryCTP30 hr
Jan 17, 8:08 PM ESTDense Fog AdvisoryCTP8 hr
Jan 20, 11:05 PM ESTDense Fog AdvisoryCTP14 hr
Jan 21, 4:52 PM ESTDense Fog AdvisoryCTP20 hr
Jan 22, 1:58 PM ESTWinter Storm WatchCTP323 days
Jan 23, 4:11 AM ESTWinter Storm WarningCTP30 hr
Jan 30, 1:58 PM ESTWinter Weather AdvisoryCTP34 hr
Feb 1, 11:29 AM ESTSpecial Weather StatementCTP31 min
Feb 8, 4:13 AM ESTWinter Weather AdvisoryCTP30 hr
Feb 12, 4:00 AM ESTFreezing Rain AdvisoryCTP13 hr
Feb 12, 4:22 AM ESTWind AdvisoryCTP37 hr
Feb 15, 12:54 PM ESTSpecial Weather StatementCTP3 hr
Feb 15, 1:07 PM ESTSpecial Weather StatementCTP3 hr
Feb 25, 9:26 AM ESTSpecial Weather StatementCTP34 min
Mar 1, 3:43 PM ESTWind AdvisoryCTP17 hr
Mar 3, 11:00 AM ESTSpecial Weather StatementCTP60 min
Mar 3, 11:53 AM ESTSpecial Weather StatementCTP67 min
Mar 7, 1:22 PM ESTWind AdvisoryCTP36 hr
Mar 11, 8:54 PM ESTWinter Storm WatchCTP18 hr
Mar 12, 3:24 PM EDTWinter Storm WarningCTP48 hr
Mar 14, 2:56 PM EDTWinter Weather AdvisoryCTP41 hr
Mar 17, 3:40 PM EDTWinter Weather AdvisoryCTP19 hr
Mar 23, 2:18 PM EDTWinter Weather AdvisoryCTP21 hr
Mar 31, 3:03 AM EDTAreal Flood AdvisoryCTP3 hr
Apr 16, 2:15 PM EDTMesoscale DiscussionSPC3 hr
Apr 16, 3:56 PM EDTSpecial Weather StatementCTP34 min
Apr 20, 10:13 PM EDTSevere Thunderstorm WarningCTP62 min
Apr 20, 10:28 PM EDTSpecial Weather StatementCTP32 min
Apr 30, 7:10 PM EDTSevere Thunderstorm WarningCTP65 min
May 1, 1:41 PM EDTMesoscale DiscussionSPC64 min
May 1, 2:12 PM EDTTornado WatchSPC8 hr
May 1, 4:22 PM EDTSevere Thunderstorm WarningCTP68 min
May 1, 4:35 PM EDTTornado WarningCTP55 min
May 1, 4:36 PM EDTMesoscale DiscussionSPC84 min
May 1, 5:25 PM EDTSevere Thunderstorm WarningCTP95 min
May 1, 5:58 PM EDTAreal Flood AdvisoryCTP3 hr
May 6, 1:01 AM EDTAreal Flood AdvisoryCTP3 hr
May 18, 2:04 PM EDTMesoscale DiscussionSPC116 min
May 18, 3:17 PM EDTSpecial Weather StatementCTP28 min
May 18, 3:36 PM EDTSevere Thunderstorm WatchSPC6 hr
May 18, 3:47 PM EDTSpecial Weather StatementCTP28 min
May 18, 5:36 PM EDTMesoscale DiscussionSPC84 min
May 18, 7:04 PM EDTSpecial Weather StatementCTP26 min
May 30, 12:03 PM EDTMesoscale DiscussionSPC2 hr
May 30, 12:17 PM EDTSpecial Weather StatementCTP43 min
May 30, 12:39 PM EDTSevere Thunderstorm WatchSPC6 hr
May 30, 12:44 PM EDTSpecial Weather StatementCTP46 min
May 30, 4:03 PM EDTMesoscale DiscussionSPC117 min
May 31, 2:03 PM EDTSpecial Weather StatementCTP87 min
Jun 5, 5:08 PM EDTSpecial Weather StatementCTP22 min
Jun 5, 6:26 PM EDTAreal Flood AdvisoryCTP2 hr
Jun 15, 11:50 AM EDTFlash Flood WatchCTP14 hr
Jun 15, 6:23 PM EDTSevere Thunderstorm WarningCTP67 min
Jun 18, 12:31 PM EDTMesoscale DiscussionSPC119 min
Jun 18, 1:31 PM EDTFlash Flood WatchCTP15 hr
Jun 18, 1:37 PM EDTSevere Thunderstorm WatchSPC8 hr
Jun 18, 4:57 PM EDTSevere Thunderstorm WarningCTP48 min
Jun 18, 5:47 PM EDTSevere Thunderstorm WarningCTP58 min
Jun 22, 1:18 PM EDTMesoscale DiscussionSPC2 hr
Jun 25, 6:59 PM EDTSpecial Weather StatementCTP31 min
Jul 17, 12:14 PM EDTMesoscale DiscussionSPC2 hr
Jul 20, 11:36 AM EDTMesoscale DiscussionSPC114 min
Jul 20, 3:31 PM EDTSevere Thunderstorm WarningCTP59 min
Jul 23, 2:27 PM EDTFlash Flood WatchCTP18 hr
Jul 23, 3:40 PM EDTSevere Thunderstorm WarningCTP80 min
Jul 23, 3:44 PM EDTMesoscale DiscussionSPC3 hr
Jul 23, 9:30 PM EDTAreal Flood AdvisoryCTP3 hr
Jul 23, 10:09 PM EDTFlash Flood WarningCTP4 hr
Aug 1, 6:45 PM EDTSpecial Weather StatementCTP60 min
Aug 3, 12:57 PM EDTSpecial Weather StatementCTP63 min
Aug 4, 1:25 PM EDTSevere Thunderstorm WatchSPC8 hr
Aug 4, 3:46 PM EDTMesoscale DiscussionSPC119 min
Aug 4, 5:51 PM EDTSpecial Weather StatementCTP39 min
Aug 4, 5:59 PM EDTSevere Thunderstorm WarningCTP61 min
Aug 4, 7:41 PM EDTMesoscale DiscussionSPC2 hr
Aug 12, 1:41 PM EDTMesoscale DiscussionSPC2 hr
Aug 22, 11:55 AM EDTMesoscale DiscussionSPC3 hr
Aug 22, 12:23 PM EDTTornado WatchSPC9 hr
Aug 22, 2:44 PM EDTSpecial Weather StatementCTP31 min
Aug 22, 2:44 PM EDTMesoscale DiscussionSPC2 hr
Aug 22, 3:14 PM EDTSevere Thunderstorm WarningCTP76 min
Aug 22, 4:48 PM EDTMesoscale DiscussionSPC87 min
Aug 22, 5:09 PM EDTSevere Thunderstorm WarningCTP66 min
Aug 22, 5:38 PM EDTSevere Thunderstorm WarningCTP37 min
Aug 22, 5:51 PM EDTTornado WarningCTP39 min
Aug 22, 6:13 PM EDTSevere Thunderstorm WarningCTP53 min
Sep 5, 1:22 AM EDTSpecial Weather StatementCTP23 min
Sep 16, 6:50 AM EDTDense Fog AdvisoryCTP3 hr
Sep 30, 3:56 AM EDTFreeze WatchCTP10 hr
Sep 30, 1:58 PM EDTFreeze WarningCTP19 hr
Oct 15, 3:03 PM EDTMesoscale DiscussionSPC57 min
Oct 15, 5:55 PM EDTSevere Thunderstorm WarningCTP65 min
Oct 23, 6:03 PM EDTWind AdvisoryCTP14 hr
Oct 29, 4:16 AM EDTWind AdvisoryCTP32 hr
Oct 29, 8:30 PM EDTAreal Flood AdvisoryCTP3 hr
Oct 29, 11:54 PM EDTAreal Flood AdvisoryCTP3 hr
Oct 30, 2:50 AM EDTAreal Flood AdvisoryCTP3 hr
Nov 5, 8:55 PM ESTSpecial Weather StatementCTP35 min
Nov 18, 4:05 AM ESTWind AdvisoryCTP32 hr
Dec 12, 8:18 AM ESTSpecial Weather StatementCTP57 min
Dec 13, 4:05 AM ESTWinter Weather AdvisoryCTP28 hr
Dec 21, 2:37 AM ESTWinter Weather AdvisoryCTP34 hr
Dec 24, 3:22 AM ESTWinter Weather AdvisoryCTP37 hr
Dec 24, 11:12 AM ESTWind AdvisoryCTP29 hr
Dec 27, 2:19 PM ESTWind Chill AdvisoryCTP21 hr
Dec 30, 4:31 AM ESTWind Chill AdvisoryCTP4 days
Dec 30, 3:48 PM ESTSpecial Weather StatementCTP72 min

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 archive20162018

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.