Alert archive / Pennsylvania / Tioga County

Weather alerts in Tioga County, Pennsylvania, 2018

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

Tioga County and its neighbors

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

Alerts
138
Warnings
28
Watches
21
Advisories
36
Busiest month
July22 alerts
Busiest day
October 2, 201816 alerts

Over time

By month

Warning verification

How often warnings here had a storm report inside them, and how much warning the reports had.

1 of 5 tornado warnings covering Tioga County in 2018 had a tornado report inside them; 0 of 1 tornado reports fell inside a warning.

Tioga County, 2018

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings5180%10%
Severe thunderstorm warnings10640%1479%20 min
Flash flood warnings30100%0

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 12, 4:46 AM ESTWinter Weather AdvisoryCTP29 hr
Jan 12, 1:23 PM ESTAreal Flood AdvisoryCTP6 hr
Jan 12, 7:04 PM ESTMesoscale DiscussionSPC6 hr
Jan 12, 7:24 PM ESTAreal Flood AdvisoryCTP3 hr
Jan 13, 3:47 AM ESTMesoscale DiscussionSPC6 hr
Jan 13, 1:21 PM ESTWind Chill AdvisoryCTP21 hr
Jan 15, 2:22 PM ESTWinter Weather AdvisoryCTP41 hr
Jan 29, 4:32 AM ESTWinter Weather AdvisoryCTP38 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, 2:38 PM ESTWinter Weather AdvisoryCTP19 hr
Feb 11, 12:01 AM ESTDense Fog AdvisoryCTP10 hr
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 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 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, 5:54 PM EDTSevere Thunderstorm WarningCTP81 min
May 10, 2:13 PM EDTSpecial Weather StatementCTP77 min
May 12, 2:13 PM EDTAreal Flood AdvisoryCTP5 hr
May 15, 8:16 AM EDTSpecial Weather StatementCTP44 min
May 15, 11:43 AM EDTMesoscale DiscussionSPC3 hr
May 15, 12:26 PM EDTSevere Thunderstorm WatchSPC7 hr
May 15, 1:03 PM EDTSpecial Weather StatementCTP42 min
May 15, 1:14 PM EDTSevere Thunderstorm WarningCTP61 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, 6:54 PM EDTSpecial Weather StatementCTP66 min
Jun 13, 7:12 PM EDTMesoscale DiscussionSPC93 min
Jun 13, 7:31 PM EDTSevere Thunderstorm WarningCTP59 min
Jun 13, 7:57 PM EDTTornado WarningCTP33 min
Jun 18, 9:24 PM EDTSpecial Weather StatementCTP36 min
Jun 29, 2:28 PM EDTHeat AdvisoryCTP4 days
Jul 2, 1:03 PM EDTMesoscale DiscussionSPC72 min
Jul 2, 3:13 PM EDTSpecial Weather StatementCTP47 min
Jul 2, 4:25 PM EDTSpecial Weather StatementCTP35 min
Jul 2, 5:46 PM EDTSpecial Weather StatementCTP44 min
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 14, 7:09 PM EDTSpecial Weather StatementCTP51 min
Jul 16, 9:23 PM EDTFlash Flood WarningCTP112 min
Jul 16, 9:33 PM EDTSpecial Weather StatementCTP42 min
Jul 16, 9:59 PM EDTSpecial Weather StatementCTP31 min
Jul 16, 10:04 PM EDTSevere Thunderstorm WarningCTP41 min
Jul 16, 11:47 PM EDTAreal Flood WarningCTP6 hr
Jul 23, 3:59 AM EDTFlash Flood WatchCTP4 days
Jul 23, 2:18 PM EDTSevere Thunderstorm WarningCTP57 min
Jul 23, 7:18 PM EDTSpecial Weather StatementCTP57 min
Jul 23, 10:39 PM EDTAreal Flood AdvisoryCTP3 hr
Jul 24, 12:07 AM EDTFlash Flood WarningCTP4 hr
Jul 24, 5:20 PM EDTAreal Flood AdvisoryCTP115 min
Jul 24, 5:58 PM EDTAreal Flood WarningCTP48 hr
Aug 1, 4:06 AM EDTFlash Flood WatchCTP3 days
Aug 3, 6:26 AM EDTAreal Flood AdvisoryCTP3 hr
Aug 3, 1:43 PM EDTAreal Flood AdvisoryCTP3 hr
Aug 4, 2:59 AM EDTDense Fog AdvisoryCTP6 hr
Aug 11, 8:30 AM EDTAreal Flood AdvisoryCTP3 hr
Aug 11, 10:54 AM EDTFlash Flood WatchCTP8 hr
Aug 13, 1:46 AM EDTFlash Flood WatchCTP43 hr
Aug 14, 2:11 PM EDTAreal Flood AdvisoryCTP3 hr
Aug 29, 8:51 PM EDTSpecial Weather StatementCTP54 min
Sep 6, 12:05 PM EDTSpecial Weather StatementCTP40 min
Sep 6, 12:47 PM EDTSpecial Weather StatementCTP43 min
Sep 6, 1:20 PM EDTMesoscale DiscussionSPC2 hr
Sep 6, 2:44 PM EDTSpecial Weather StatementCTP31 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, 7:04 PM EDTMesoscale DiscussionSPC116 min
Sep 21, 8:58 PM EDTSevere Thunderstorm WarningCTP47 min
Sep 21, 9:22 PM EDTAreal Flood AdvisoryCTP3 hr
Sep 21, 10:46 PM EDTAreal Flood AdvisoryCTP3 hr
Sep 23, 2:53 AM EDTSpecial Weather StatementCTP3 hr
Sep 23, 5:33 AM EDTSpecial Weather StatementCTP3 hr
Sep 26, 2:48 PM EDTMesoscale DiscussionSPC2 hr
Oct 2, 1:12 PM EDTFlash Flood WatchCTP9 hr
Oct 2, 1:59 PM EDTSpecial Weather StatementCTP61 min
Oct 2, 2:26 PM EDTMesoscale DiscussionSPC2 hr
Oct 2, 2:48 PM EDTSpecial Weather StatementCTP42 min
Oct 2, 2:55 PM EDTTornado WatchSPC8 hr
Oct 2, 3:03 PM EDTSevere Thunderstorm WarningCTP42 min
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, 4:48 PM EDTTornado Warning Tornado observedCTP42 min
Oct 2, 4:54 PM EDTSpecial Weather StatementCTP36 min
Oct 2, 5:24 PM EDTSevere Thunderstorm WarningCTP36 min
Oct 2, 5:33 PM EDTTornado WarningCTP42 min
Oct 2, 5:56 PM EDTAreal Flood AdvisoryCTP3 hr
Oct 2, 7:24 PM EDTMesoscale DiscussionSPC81 min
Oct 6, 5:50 PM EDTSpecial Weather StatementCTP40 min
Oct 6, 6:48 PM EDTSpecial Weather StatementCTP57 min
Oct 13, 1:13 PM EDTFrost AdvisoryCTP19 hr
Nov 2, 3:46 AM EDTSpecial Weather StatementCTP29 min
Nov 2, 4:16 AM EDTSpecial Weather StatementCTP29 min
Nov 2, 4:47 AM EDTSpecial Weather StatementCTP28 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 15, 10:06 PM ESTMesoscale DiscussionSPC6 hr
Nov 16, 3:56 AM 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 19, 3:49 AM ESTFlood WatchCTP69 hr
Dec 21, 4:07 PM ESTSpecial Weather StatementCTP23 min
Dec 21, 4:15 PM ESTSevere Thunderstorm WarningCTP45 min
Dec 21, 4:16 PM ESTMesoscale DiscussionSPC59 min
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.