Alert archive / Pennsylvania / Columbia County

Weather alerts in Columbia County, Pennsylvania, 2012

144 weather alerts in 2012, 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 2012. Tap one for its archive.

Alerts
144
Warnings
43
Watches
26
Advisories
22
Busiest month
July31 alerts
Busiest day
July 26, 20128 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 1 tornado warnings covering Columbia County in 2012 had a tornado report inside them.

Columbia County, 2012

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings10100%0
Severe thunderstorm warnings241442%875%20 min
Flash flood warnings30100%20%

Each office's whole area, 2012

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS State College, PA: tornado warnings6267%850%24 min
NWS State College, PA: severe thunderstorm warnings22613341%37084%28 min
NWS State College, PA: flash flood warnings211148%2488%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 2, 9:08 AM ESTSpecial Weather StatementCTP3 hr
Jan 12, 2:36 PM ESTWind AdvisoryCTP28 hr
Jan 14, 4:42 PM ESTSpecial Weather StatementCTP78 min
Jan 14, 9:39 PM ESTSpecial Weather StatementCTP51 min
Jan 14, 10:37 PM ESTSpecial Weather StatementCTP113 min
Jan 16, 4:10 AM ESTWinter Weather AdvisoryCTP26 hr
Jan 20, 4:28 AM ESTWinter Weather AdvisoryCTP30 hr
Jan 21, 12:59 AM ESTMesoscale DiscussionSPC4 hr
Jan 22, 3:09 AM ESTFreezing Rain AdvisoryCTP33 hr
Jan 29, 7:40 PM ESTSpecial Weather StatementCTP110 min
Feb 23, 9:52 PM ESTWind AdvisoryCTP37 hr
Apr 2, 1:34 PM EDTFreeze WarningCTP18 hr
Apr 5, 2:10 PM EDTFreeze WarningCTP18 hr
Apr 5, 4:06 PM EDTFire Weather WatchCTP12 hr
Apr 6, 4:19 AM EDTRed Flag WarningCTP16 hr
Apr 6, 11:01 AM EDTRed Flag WarningCTP33 hr
Apr 6, 11:05 AM EDTFreeze WarningCTP21 hr
Apr 7, 3:58 AM EDTFire Weather WatchCTP16 hr
Apr 7, 2:41 PM EDTFreeze WarningCTP17 hr
Apr 7, 8:27 PM EDTRed Flag WarningCTP24 hr
Apr 8, 4:49 AM EDTFire Weather WatchCTP17 hr
Apr 8, 9:49 PM EDTRed Flag WarningCTP22 hr
Apr 11, 4:45 AM EDTFreeze WatchCTP10 hr
Apr 11, 2:21 PM EDTFreeze WatchCTP13 hr
Apr 12, 3:48 AM EDTFreeze WarningCTP29 hr
Apr 24, 7:00 PM EDTFrost AdvisoryCTP13 hr
Apr 27, 4:26 AM EDTFreeze WatchCTP5 hr
Apr 27, 9:40 AM EDTFreeze WarningCTP23 hr
Apr 28, 4:04 AM EDTFreeze WatchCTP11 hr
Apr 28, 2:34 PM EDTFreeze WarningCTP18 hr
Apr 29, 3:39 AM EDTFreeze WatchCTP6 hr
Apr 29, 9:51 AM EDTFreeze WarningCTP23 hr
May 3, 5:45 PM EDTMesoscale DiscussionSPC60 min
May 4, 3:22 AM EDTSpecial Weather StatementCTP68 min
May 4, 1:26 PM EDTMesoscale DiscussionSPC2 hr
May 23, 2:55 PM EDTAreal Flood AdvisoryCTP3 hr
May 26, 1:17 PM EDTMesoscale DiscussionSPC88 min
May 26, 2:08 PM EDTMesoscale DiscussionSPC37 min
May 26, 2:29 PM EDTSevere Thunderstorm WatchSPC6 hr
May 26, 3:43 PM EDTSpecial Weather StatementCTP32 min
May 26, 4:46 PM EDTSpecial Weather StatementCTP74 min
May 26, 5:35 PM EDTFlash Flood WarningCTP85 min
May 26, 6:04 PM EDTMesoscale DiscussionSPC56 min
May 27, 5:21 PM EDTSevere Thunderstorm WatchSPC4 hr
May 27, 7:46 PM EDTSpecial Weather StatementCTP44 min
May 27, 7:56 PM EDTSevere Thunderstorm WarningCTP81 min
May 27, 8:23 PM EDTAreal Flood AdvisoryCTP112 min
May 27, 9:09 PM EDTFlash Flood WarningCTP3 hr
May 29, 1:03 PM EDTSevere Thunderstorm WatchSPC8 hr
May 29, 2:13 PM EDTMesoscale DiscussionSPC62 min
May 29, 3:12 PM EDTMesoscale DiscussionSPC63 min
May 29, 3:36 PM EDTSevere Thunderstorm WarningCTP54 min
May 29, 3:43 PM EDTSevere Thunderstorm WarningCTP77 min
May 29, 4:26 PM EDTSevere Thunderstorm WarningCTP34 min
May 29, 4:40 PM EDTMesoscale DiscussionSPC65 min
Jun 1, 5:02 PM EDTFlash Flood WatchCTP8 hr
Jun 1, 6:04 PM EDTTornado WatchSPC5 hr
Jun 1, 8:38 PM EDTSevere Thunderstorm WarningCTP52 min
Jun 1, 8:47 PM EDTSevere Thunderstorm WarningCTP58 min
Jun 3, 3:11 PM EDTSpecial Weather StatementCTP64 min
Jun 3, 4:46 PM EDTSevere Thunderstorm WarningCTP59 min
Jun 3, 7:50 PM EDTSevere Thunderstorm WarningCTP40 min
Jun 3, 8:32 PM EDTSpecial Weather StatementCTP28 min
Jun 19, 2:58 PM EDTHeat AdvisoryCTP53 hr
Jun 22, 12:18 PM EDTMesoscale DiscussionSPC2 hr
Jun 22, 1:41 PM EDTSevere Thunderstorm WatchSPC7 hr
Jun 22, 2:04 PM EDTSevere Thunderstorm WarningCTP56 min
Jun 29, 3:41 AM EDTMesoscale DiscussionSPC94 min
Jul 1, 12:11 PM EDTMesoscale DiscussionSPC64 min
Jul 6, 11:16 AM EDTHeat AdvisoryCTP33 hr
Jul 7, 11:19 AM EDTMesoscale DiscussionSPC86 min
Jul 7, 11:41 AM EDTSevere Thunderstorm WatchSPC7 hr
Jul 7, 1:36 PM EDTMesoscale DiscussionSPC84 min
Jul 7, 3:57 PM EDTMesoscale DiscussionSPC2 hr
Jul 7, 4:26 PM EDTSevere Thunderstorm WarningCTP64 min
Jul 7, 5:10 PM EDTSevere Thunderstorm WarningCTP50 min
Jul 7, 6:14 PM EDTSevere Thunderstorm WatchSPC3 hr
Jul 11, 3:35 PM EDTSpecial Weather StatementCTP25 min
Jul 15, 4:47 PM EDTSpecial Weather StatementCTP58 min
Jul 15, 5:40 PM EDTSpecial Weather StatementCTP35 min
Jul 15, 5:48 PM EDTSevere Thunderstorm WarningCTP57 min
Jul 18, 10:25 AM EDTMesoscale DiscussionSPC2 hr
Jul 18, 12:41 PM EDTSevere Thunderstorm WatchSPC8 hr
Jul 19, 11:57 PM EDTAreal Flood AdvisoryCTP108 min
Jul 20, 4:23 AM EDTFlash Flood WatchCTP19 hr
Jul 23, 12:32 PM EDTMesoscale DiscussionSPC88 min
Jul 23, 1:24 PM EDTSevere Thunderstorm WatchSPC10 hr
Jul 23, 4:01 PM EDTMesoscale DiscussionSPC119 min
Jul 26, 7:29 AM EDTSpecial Weather StatementCTP61 min
Jul 26, 1:16 PM EDTSevere Thunderstorm WatchSPC9 hr
Jul 26, 3:37 PM EDTMesoscale DiscussionSPC113 min
Jul 26, 3:46 PM EDTSevere Thunderstorm WarningCTP74 min
Jul 26, 4:41 PM EDTTornado WarningCTP34 min
Jul 26, 4:58 PM EDTSevere Thunderstorm WarningCTP32 min
Jul 26, 5:06 PM EDTSevere Thunderstorm WarningCTP84 min
Jul 26, 5:46 PM EDTSevere Thunderstorm WarningCTP74 min
Jul 27, 4:38 PM EDTSevere Thunderstorm WarningCTP52 min
Jul 27, 5:57 PM EDTSpecial Weather StatementCTP33 min
Jul 30, 12:51 PM EDTSpecial Weather StatementCTP69 min
Aug 4, 3:25 PM EDTSevere Thunderstorm WarningCTP65 min
Aug 5, 2:49 PM EDTMesoscale DiscussionSPC86 min
Aug 5, 2:56 PM EDTSpecial Weather StatementCTP64 min
Aug 5, 4:00 PM EDTSevere Thunderstorm WarningCTP60 min
Aug 9, 5:31 PM EDTSevere Thunderstorm WarningCTP59 min
Aug 9, 5:56 PM EDTSevere Thunderstorm WarningCTP64 min
Aug 9, 6:35 PM EDTSpecial Weather StatementCTP40 min
Aug 9, 8:53 PM EDTSpecial Weather StatementCTP37 min
Aug 14, 9:57 PM EDTMesoscale DiscussionSPC2 hr
Sep 6, 6:45 PM EDTMesoscale DiscussionSPC60 min
Sep 6, 9:39 PM EDTSevere Thunderstorm WarningCTP66 min
Sep 6, 10:45 PM EDTSpecial Weather StatementCTP30 min
Sep 6, 11:09 PM EDTSevere Thunderstorm WarningCTP66 min
Sep 6, 11:42 PM EDTAreal Flood AdvisoryCTP93 min
Sep 7, 12:57 AM EDTFlash Flood WarningCTP75 min
Sep 8, 8:42 AM EDTMesoscale DiscussionSPC93 min
Sep 8, 11:38 AM EDTMesoscale DiscussionSPC97 min
Sep 8, 12:15 PM EDTSevere Thunderstorm WatchSPC9 hr
Sep 8, 2:11 PM EDTSevere Thunderstorm WarningCTP94 min
Sep 18, 11:19 AM EDTMesoscale DiscussionSPC86 min
Sep 18, 12:07 PM EDTSpecial Weather StatementCTP23 min
Sep 18, 12:10 PM EDTTornado WatchSPC9 hr
Sep 18, 12:46 PM EDTSpecial Weather StatementCTP29 min
Sep 18, 12:52 PM EDTAreal Flood AdvisoryCTP3 hr
Sep 18, 1:56 PM EDTMesoscale DiscussionSPC64 min
Oct 7, 4:54 AM EDTFrost AdvisoryCTP28 hr
Oct 11, 3:42 AM EDTFreeze WatchCTP31 hr
Oct 12, 4:25 AM EDTFrost AdvisoryCTP3 hr
Oct 12, 10:15 AM EDTFreeze WarningCTP22 hr
Oct 19, 8:55 AM EDTSpecial Weather StatementCTP50 min
Oct 19, 4:48 PM EDTMesoscale DiscussionSPC87 min
Oct 27, 4:39 AM EDTFlood WatchCTP3 days
Oct 27, 3:05 PM EDTHigh Wind WatchCTP13 hr
Oct 28, 4:11 AM EDTHigh Wind WarningCTP48 hr
Oct 29, 8:36 PM EDTAreal Flood AdvisoryCTP8 hr
Oct 30, 4:18 AM EDTWind AdvisoryCTP6 hr
Oct 30, 1:03 PM EDTAreal Flood AdvisoryCTP4 hr
Dec 6, 2:53 PM ESTFreezing Rain AdvisoryCTP20 hr
Dec 7, 3:44 AM ESTMesoscale DiscussionSPC6 hr
Dec 21, 5:37 AM ESTWind AdvisoryCTP37 hr
Dec 24, 2:56 AM ESTWinter Weather AdvisoryCTP26 hr
Dec 24, 4:00 PM ESTWinter Storm WatchCTP22 hr
Dec 25, 2:09 PM ESTWinter Storm WarningCTP40 hr
Dec 26, 12:48 PM ESTMesoscale DiscussionSPC6 hr
Dec 28, 2:57 AM ESTWinter Weather AdvisoryCTP58 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 archive20112013

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.