Alert archive / Pennsylvania / Columbia County

Weather alerts in Columbia County, Pennsylvania, 2016

91 weather alerts in 2016, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Columbia County and its neighbors

Each county as a circle sized by its count in 2016. Tap one for its archive.

Alerts
91
Warnings
13
Watches
6
Advisories
30
Busiest month
July19 alerts
Busiest day
July 25, 20169 alerts

Over time

By month

Warning verification

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

Columbia County, 2016

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings10820%5100%31 min
Flash flood warnings00

Each office's whole area, 2016

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS State College, PA: tornado warnings4325%771%14 min
NWS State College, PA: severe thunderstorm warnings1047330%19779%29 min
NWS State College, PA: flash flood warnings9633%9100%46 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 12, 4:46 PM ESTSpecial Weather StatementCTP59 min
Jan 21, 2:47 PM ESTWinter Storm WarningCTP53 hr
Jan 22, 4:13 AM ESTWinter Weather AdvisoryCTP36 hr
Jan 23, 2:30 PM ESTSpecial Weather StatementCTP75 min
Jan 25, 9:30 PM ESTFreezing Rain AdvisoryCTP12 hr
Feb 3, 7:43 PM ESTDense Fog AdvisoryCTP11 hr
Feb 12, 4:35 AM ESTWind Chill AdvisoryCTP54 hr
Feb 12, 1:22 PM ESTWind AdvisoryCTP28 hr
Feb 14, 2:32 PM ESTWinter Weather AdvisoryCTP43 hr
Feb 15, 8:29 PM ESTMesoscale DiscussionSPC5 hr
Feb 16, 1:22 PM ESTAreal Flood AdvisoryCTP3 hr
Feb 16, 4:11 PM ESTAreal Flood AdvisoryCTP3 hr
Feb 23, 3:14 PM ESTFreezing Rain AdvisoryCTP17 hr
Feb 24, 6:03 PM ESTAreal Flood AdvisoryCTP3 hr
Feb 24, 6:44 PM ESTSpecial Weather StatementCTP31 min
Feb 24, 11:18 PM ESTAreal Flood AdvisoryCTP3 hr
Feb 26, 8:15 AM ESTSpecial Weather StatementCTP60 min
Mar 16, 4:08 AM EDTDense Fog AdvisoryCTP6 hr
Mar 28, 3:42 AM EDTWind AdvisoryCTP18 hr
Apr 1, 1:46 PM EDTMesoscale DiscussionSPC119 min
Apr 1, 2:04 PM EDTSpecial Weather StatementCTP26 min
Apr 1, 4:20 PM EDTWind AdvisoryCTP40 hr
Apr 8, 3:46 AM EDTWinter Weather AdvisoryCTP36 hr
Apr 18, 1:04 PM EDTFire Weather WatchCTP15 hr
Apr 19, 4:22 AM EDTRed Flag WarningCTP16 hr
Apr 26, 1:54 PM EDTSevere Thunderstorm WatchSPC6 hr
May 1, 7:39 PM EDTSpecial Weather StatementCTP3 hr
May 23, 2:25 AM EDTDense Fog AdvisoryCTP6 hr
Jun 5, 3:10 PM EDTSpecial Weather StatementCTP50 min
Jun 5, 3:11 PM EDTSpecial Weather StatementCTP49 min
Jun 7, 2:06 PM EDTSpecial Weather StatementCTP24 min
Jun 7, 3:34 PM EDTSpecial Weather StatementCTP26 min
Jun 11, 2:32 PM EDTMesoscale DiscussionSPC58 min
Jun 21, 4:08 AM EDTSpecial Weather StatementCTP22 min
Jun 28, 1:09 PM EDTMesoscale DiscussionSPC66 min
Jun 28, 1:41 PM EDTSpecial Weather StatementCTP34 min
Jun 28, 2:15 PM EDTSpecial Weather StatementCTP30 min
Jun 28, 3:20 PM EDTSevere Thunderstorm WarningCTP55 min
Jun 28, 4:12 PM EDTSpecial Weather StatementCTP48 min
Jul 1, 12:46 PM EDTSpecial Weather StatementCTP29 min
Jul 1, 12:51 PM EDTMesoscale DiscussionSPC114 min
Jul 1, 5:21 PM EDTMesoscale DiscussionSPC84 min
Jul 14, 10:05 AM EDTMesoscale DiscussionSPC115 min
Jul 14, 12:07 PM EDTSpecial Weather StatementCTP53 min
Jul 16, 5:42 PM EDTSpecial Weather StatementCTP48 min
Jul 18, 11:40 AM EDTMesoscale DiscussionSPC95 min
Jul 18, 12:30 PM EDTSevere Thunderstorm WarningCTP75 min
Jul 18, 3:21 PM EDTMesoscale DiscussionSPC84 min
Jul 24, 2:26 PM EDTHeat AdvisoryCTP28 hr
Jul 25, 12:41 PM EDTMesoscale DiscussionSPC64 min
Jul 25, 12:43 PM EDTSevere Thunderstorm WatchSPC7 hr
Jul 25, 2:24 PM EDTSpecial Weather StatementCTP66 min
Jul 25, 2:32 PM EDTSevere Thunderstorm WarningCTP43 min
Jul 25, 2:51 PM EDTSevere Thunderstorm WarningCTP69 min
Jul 25, 3:03 PM EDTMesoscale DiscussionSPC57 min
Jul 25, 3:40 PM EDTSevere Thunderstorm WarningCTP95 min
Jul 25, 4:52 PM EDTMesoscale DiscussionSPC83 min
Jul 25, 5:15 PM EDTSevere Thunderstorm WarningCTP60 min
Jul 31, 8:58 PM EDTSevere Thunderstorm WarningCTP77 min
Aug 1, 8:29 PM EDTAreal Flood AdvisoryCTP3 hr
Aug 6, 12:54 PM EDTMesoscale DiscussionSPC3 hr
Aug 10, 7:13 PM EDTSpecial Weather StatementCTP47 min
Aug 11, 12:38 PM EDTHeat AdvisoryCTP3 days
Aug 13, 6:17 PM EDTSevere Thunderstorm WatchSPC7 hr
Aug 13, 8:53 PM EDTMesoscale DiscussionSPC2 hr
Aug 14, 1:45 PM EDTMesoscale DiscussionSPC2 hr
Aug 16, 1:40 PM EDTMesoscale DiscussionSPC2 hr
Aug 16, 3:20 PM EDTSevere Thunderstorm WatchSPC4 hr
Aug 16, 3:25 PM EDTSevere Thunderstorm WarningCTP65 min
Aug 16, 4:28 PM EDTSevere Thunderstorm WarningCTP62 min
Aug 16, 4:55 PM EDTMesoscale DiscussionSPC95 min
Aug 16, 8:57 PM EDTSpecial Weather StatementCTP63 min
Sep 18, 6:40 PM EDTSevere Thunderstorm WarningCTP47 min
Sep 18, 9:36 PM EDTAreal Flood AdvisoryCTP114 min
Sep 18, 10:07 PM EDTSpecial Weather StatementCTP53 min
Sep 19, 4:17 PM EDTSpecial Weather StatementCTP58 min
Oct 4, 1:18 AM EDTDense Fog AdvisoryCTP8 hr
Oct 6, 2:04 AM EDTDense Fog AdvisoryCTP7 hr
Oct 10, 4:27 AM EDTFrost AdvisoryCTP29 hr
Oct 14, 2:35 PM EDTFrost AdvisoryCTP18 hr
Oct 20, 11:01 PM EDTMesoscale DiscussionSPC59 min
Oct 24, 2:43 PM EDTFreeze WatchCTP13 hr
Oct 25, 3:37 AM EDTFreeze WarningCTP29 hr
Nov 19, 4:54 AM ESTWind AdvisoryCTP62 hr
Nov 29, 9:06 PM ESTDense Fog AdvisoryCTP10 hr
Dec 10, 2:20 PM ESTWinter Weather AdvisoryCTP43 hr
Dec 15, 7:28 AM ESTSpecial Weather StatementCTP92 min
Dec 16, 3:39 AM ESTWinter Weather AdvisoryCTP44 hr
Dec 17, 11:34 PM ESTSpecial Weather StatementCTP56 min
Dec 23, 2:19 PM ESTWinter Weather AdvisoryCTP18 hr
Dec 25, 2:06 PM ESTFreezing Rain AdvisoryCTP21 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.