Alert archive / Pennsylvania / Potter County

Weather alerts in Potter County, Pennsylvania, 2018

122 weather alerts in 2018, 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 2018. Tap one for its archive.

Alerts
122
Warnings
25
Watches
18
Advisories
32
Busiest month
July21 alerts
Busiest day
October 2, 201810 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 3 tornado warnings covering Potter County in 2018 had a tornado report inside them.

Potter County, 2018

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings30100%0
Severe thunderstorm warnings7529%2100%34 min
Flash flood warnings3167%333%123 min

Each office's whole area, 2018

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS State College, PA: tornado warnings22577%1050%7 min
NWS State College, PA: severe thunderstorm warnings1228134%24480%30 min
NWS State College, PA: flash flood warnings573637%8988%96 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, 3:29 AM ESTWind Chill WatchCTP24 hr
Jan 4, 3:46 AM ESTWind Chill WarningCTP62 hr
Jan 4, 3:46 AM ESTWind Chill AdvisoryCTP3 days
Jan 10, 3:07 PM ESTWinter Storm WatchCTP38 hr
Jan 11, 4:34 AM ESTFlood WatchCTP51 hr
Jan 11, 4:16 PM ESTWinter Storm WarningCTP41 hr
Jan 12, 8:59 AM ESTAreal Flood AdvisoryCTP3 hr
Jan 12, 1:23 PM ESTAreal Flood AdvisoryCTP6 hr
Jan 12, 7:04 PM ESTMesoscale DiscussionSPC6 hr
Jan 12, 7:12 PM ESTAreal Flood WarningCTP3 hr
Jan 12, 10:03 PM ESTAreal Flood WarningCTP3 hr
Jan 13, 3:47 AM ESTMesoscale DiscussionSPC6 hr
Jan 13, 1:21 PM ESTWind Chill AdvisoryCTP21 hr
Jan 29, 4:32 AM ESTWinter Weather AdvisoryCTP38 hr
Feb 1, 4:59 PM ESTSpecial Weather StatementCTP2 hr
Feb 1, 7:15 PM ESTSpecial Weather StatementCTP90 min
Feb 3, 2:44 PM ESTWinter Weather AdvisoryCTP42 hr
Feb 5, 2:40 PM ESTWinter Storm WatchCTP24 hr
Feb 6, 2:41 PM ESTWinter Storm WarningCTP27 hr
Feb 7, 5:28 AM ESTMesoscale DiscussionSPC5 hr
Feb 7, 11:25 AM ESTMesoscale DiscussionSPC6 hr
Feb 10, 6:21 AM ESTSpecial Weather StatementCTP54 min
Feb 10, 2:38 PM ESTWinter Weather AdvisoryCTP19 hr
Feb 11, 12:01 AM ESTDense Fog AdvisoryCTP10 hr
Feb 13, 10:50 PM ESTSpecial Weather StatementCTP25 min
Feb 21, 2:14 PM ESTWinter Weather AdvisoryCTP46 hr
Feb 22, 11:29 AM ESTFlood WatchCTP68 hr
Feb 28, 3:10 PM ESTWinter Storm WatchCTP25 hr
Mar 1, 3:48 PM ESTWinter Storm WarningCTP23 hr
Mar 1, 8:43 PM ESTMesoscale DiscussionSPC6 hr
Mar 27, 5:00 AM EDTWinter Weather AdvisoryCTP12 hr
Mar 29, 2:28 AM EDTDense Fog AdvisoryCTP8 hr
Apr 3, 3:25 PM EDTWind AdvisoryCTP12 hr
Apr 4, 3:36 AM EDTHigh Wind WarningCTP16 hr
Apr 4, 12:33 PM EDTSpecial Weather StatementCTP57 min
Apr 4, 1:37 PM EDTSpecial Weather StatementCTP53 min
Apr 16, 1:45 PM EDTSpecial Weather StatementCTP45 min
Apr 18, 2:51 PM EDTWinter Weather AdvisoryCTP13 hr
May 2, 4:45 AM EDTRed Flag WarningCTP16 hr
May 4, 2:23 PM EDTMesoscale DiscussionSPC97 min
May 4, 2:44 PM EDTSevere Thunderstorm WatchSPC6 hr
May 4, 4:20 PM EDTMesoscale DiscussionSPC55 min
May 4, 5:09 PM EDTSevere Thunderstorm WarningCTP96 min
May 10, 2:13 PM EDTSpecial Weather StatementCTP77 min
May 12, 2:13 PM EDTAreal Flood AdvisoryCTP5 hr
May 15, 11:43 AM EDTMesoscale DiscussionSPC3 hr
May 15, 12:26 PM EDTSevere Thunderstorm WatchSPC7 hr
May 15, 12:43 PM EDTSevere Thunderstorm WarningCTP47 min
May 15, 12:46 PM EDTTornado WarningCTP44 min
May 15, 1:25 PM EDTTornado WarningCTP65 min
May 28, 2:16 PM EDTMesoscale DiscussionSPC2 hr
Jun 13, 3:30 PM EDTMesoscale DiscussionSPC60 min
Jun 13, 4:06 PM EDTSevere Thunderstorm WatchSPC7 hr
Jun 13, 6:10 PM EDTMesoscale DiscussionSPC95 min
Jun 13, 6:27 PM EDTSpecial Weather StatementCTP33 min
Jun 13, 6:54 PM EDTSpecial Weather StatementCTP66 min
Jun 13, 7:12 PM EDTMesoscale DiscussionSPC93 min
Jun 13, 7:31 PM EDTSevere Thunderstorm WarningCTP59 min
Jun 18, 8:49 PM EDTSpecial Weather StatementCTP26 min
Jun 24, 2:51 PM EDTSpecial Weather StatementCTP54 min
Jul 2, 12:50 PM EDTSpecial Weather StatementCTP55 min
Jul 2, 1:03 PM EDTMesoscale DiscussionSPC72 min
Jul 2, 1:53 PM EDTSpecial Weather StatementCTP52 min
Jul 2, 4:41 PM EDTSpecial Weather StatementCTP19 min
Jul 2, 6:13 PM EDTAreal Flood AdvisoryCTP3 hr
Jul 4, 9:03 AM EDTAreal Flood AdvisoryCTP117 min
Jul 4, 9:54 AM EDTFlash Flood WatchCTP10 hr
Jul 4, 10:29 AM EDTAreal Flood AdvisoryCTP2 hr
Jul 4, 12:21 PM EDTFlash Flood WarningCTP3 hr
Jul 5, 4:17 AM EDTFlash Flood WatchCTP30 hr
Jul 16, 6:13 PM EDTAreal Flood AdvisoryCTP2 hr
Jul 16, 6:37 PM EDTFlash Flood WarningCTP3 hr
Jul 16, 7:26 PM EDTSpecial Weather StatementCTP64 min
Jul 16, 8:07 PM EDTAreal Flood AdvisoryCTP3 hr
Jul 16, 8:32 PM EDTSpecial Weather StatementCTP58 min
Jul 16, 9:23 PM EDTFlash Flood WarningCTP112 min
Jul 16, 11:47 PM EDTAreal Flood WarningCTP6 hr
Jul 23, 3:59 AM EDTFlash Flood WatchCTP4 days
Jul 23, 6:46 PM EDTSpecial Weather StatementCTP29 min
Jul 23, 10:39 PM EDTAreal Flood AdvisoryCTP3 hr
Jul 28, 12:51 AM EDTSpecial Weather StatementCTP54 min
Aug 4, 2:59 AM EDTDense Fog AdvisoryCTP6 hr
Aug 21, 6:40 PM EDTSpecial Weather StatementCTP35 min
Aug 29, 7:26 PM EDTSpecial Weather StatementCTP34 min
Aug 29, 7:51 PM EDTSpecial Weather StatementCTP39 min
Sep 8, 3:33 AM EDTFlood WatchCTP64 hr
Sep 10, 10:19 AM EDTAreal Flood WarningCTP9 hr
Sep 16, 7:11 AM EDTDense Fog AdvisoryCTP3 hr
Sep 17, 4:51 AM EDTFlash Flood WatchCTP31 hr
Sep 18, 2:02 AM EDTAreal Flood WarningCTP6 hr
Sep 21, 4:50 PM EDTSevere Thunderstorm WatchSPC6 hr
Sep 21, 7:04 PM EDTMesoscale DiscussionSPC116 min
Sep 21, 7:37 PM EDTSevere Thunderstorm WarningCTP83 min
Sep 21, 8:58 PM EDTSevere Thunderstorm WarningCTP47 min
Sep 21, 9:22 PM EDTAreal Flood AdvisoryCTP3 hr
Sep 23, 2:53 AM EDTSpecial Weather StatementCTP3 hr
Sep 23, 5:33 AM EDTSpecial Weather StatementCTP3 hr
Oct 2, 1:12 PM EDTFlash Flood WatchCTP9 hr
Oct 2, 1:20 PM EDTAreal Flood AdvisoryCTP3 hr
Oct 2, 2:26 PM EDTMesoscale DiscussionSPC2 hr
Oct 2, 2:55 PM EDTTornado WatchSPC8 hr
Oct 2, 3:24 PM EDTSevere Thunderstorm WarningCTP96 min
Oct 2, 3:59 PM EDTAreal Flood AdvisoryCTP3 hr
Oct 2, 4:15 PM EDTTornado WarningCTP45 min
Oct 2, 4:43 PM EDTMesoscale DiscussionSPC2 hr
Oct 2, 5:27 PM EDTSevere Thunderstorm WarningCTP93 min
Oct 2, 7:24 PM EDTMesoscale DiscussionSPC81 min
Oct 6, 6:48 PM EDTSpecial Weather StatementCTP57 min
Oct 8, 3:30 AM EDTDense Fog AdvisoryCTP7 hr
Oct 13, 1:13 PM EDTFrost AdvisoryCTP19 hr
Nov 2, 3:46 AM EDTSpecial Weather StatementCTP29 min
Nov 10, 7:40 AM ESTSpecial Weather StatementCTP65 min
Nov 14, 4:31 AM ESTWinter Storm WatchCTP11 hr
Nov 14, 3:40 PM ESTWinter Storm WarningCTP38 hr
Nov 15, 9:56 AM ESTMesoscale DiscussionSPC6 hr
Nov 15, 4:39 PM ESTMesoscale DiscussionSPC6 hr
Nov 23, 11:02 AM ESTWinter Weather AdvisoryCTP27 hr
Nov 24, 10:08 AM ESTMesoscale DiscussionSPC5 hr
Nov 29, 1:26 PM ESTWinter Weather AdvisoryCTP24 hr
Dec 2, 7:37 PM ESTDense Fog AdvisoryCTP8 hr
Dec 15, 3:18 PM ESTWinter Weather AdvisoryCTP20 hr
Dec 30, 1:10 AM ESTWinter Weather AdvisoryCTP6 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.