Alert archive / Pennsylvania / Blair County

Weather alerts in Blair County, Pennsylvania, 2023

111 weather alerts in 2023, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Blair County and its neighbors

Each county as a circle sized by its count in 2023. Tap one for its archive.

Alerts
111
Warnings
20
Watches
17
Advisories
29
Busiest month
July19 alerts
Busiest day
April 1, 20237 alerts

Over time

By month

Warning verification

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

Blair County, 2023

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings13838%8100%13 min
Flash flood warnings010%

Each office's whole area, 2023

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS State College, PA: tornado warnings18572%1540%3 min
NWS State College, PA: severe thunderstorm warnings18613627%38183%19 min
NWS State College, PA: flash flood warnings8363%863%42 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, 2:21 AM ESTDense Fog AdvisoryCTP7 hr
Jan 19, 2:50 AM ESTWind AdvisoryCTP33 hr
Jan 21, 2:13 PM ESTWinter Weather AdvisoryCTP43 hr
Jan 24, 4:16 AM ESTWinter Storm WatchCTP23 hr
Jan 24, 4:16 AM ESTWinter Weather AdvisoryCTP42 hr
Jan 26, 6:52 PM ESTSpecial Weather StatementCTP68 min
Jan 26, 7:09 PM ESTSnow Squall WarningCTP36 min
Jan 27, 5:51 AM ESTSpecial Weather StatementCTP54 min
Feb 3, 1:29 AM ESTSpecial Weather StatementCTP46 min
Feb 8, 12:41 PM ESTWind AdvisoryCTP42 hr
Feb 21, 3:22 AM ESTWind AdvisoryCTP16 hr
Feb 21, 3:45 PM ESTWinter Weather AdvisoryCTP28 hr
Feb 26, 3:45 PM ESTWinter Weather AdvisoryCTP43 hr
Mar 2, 1:39 PM ESTWinter Weather AdvisoryCTP43 hr
Mar 3, 4:29 AM ESTHigh Wind WatchCTP8 hr
Mar 3, 12:41 PM ESTHigh Wind WarningCTP24 hr
Mar 3, 12:41 PM ESTWind AdvisoryCTP26 hr
Mar 9, 10:33 AM ESTWinter Weather AdvisoryCTP40 hr
Mar 13, 2:35 PM EDTWind AdvisoryCTP33 hr
Mar 13, 8:12 PM EDTSpecial Weather StatementCTP63 min
Mar 29, 8:03 PM EDTSpecial Weather StatementCTP57 min
Mar 30, 3:26 AM EDTHigh Wind WatchCTP36 hr
Mar 31, 3:22 PM EDTHigh Wind WarningCTP30 hr
Mar 31, 3:22 PM EDTWind AdvisoryCTP35 hr
Apr 1, 11:15 AM EDTMesoscale DiscussionSPC3 hr
Apr 1, 2:02 PM EDTMesoscale DiscussionSPC118 min
Apr 1, 2:27 PM EDTSevere Thunderstorm WatchSPC5 hr
Apr 1, 2:50 PM EDTSpecial Weather StatementCTP25 min
Apr 1, 3:44 PM EDTSpecial Weather StatementCTP16 min
Apr 1, 3:57 PM EDTSpecial Weather StatementCTP48 min
Apr 1, 4:25 PM EDTSpecial Weather StatementCTP50 min
Apr 5, 9:57 PM EDTSevere Thunderstorm WarningCTP48 min
Apr 5, 10:20 PM EDTSpecial Weather StatementCTP25 min
Apr 5, 10:25 PM EDTSevere Thunderstorm WarningCTP50 min
Apr 11, 3:49 PM EDTFire Weather WatchCTP17 hr
Apr 12, 8:54 AM EDTRed Flag WarningCTP11 hr
Apr 23, 12:52 PM EDTFrost AdvisoryCTP19 hr
Apr 24, 3:14 AM EDTFreeze WatchCTP11 hr
Apr 24, 2:09 PM EDTFreeze WarningCTP19 hr
Apr 25, 6:51 PM EDTFreeze WatchCTP20 hr
Apr 26, 2:55 PM EDTFrost AdvisoryCTP8 hr
May 4, 12:58 PM EDTFrost AdvisoryCTP20 hr
May 14, 4:27 AM EDTDense Fog AdvisoryCTP5 hr
May 17, 11:05 AM EDTFrost AdvisoryCTP21 hr
Jun 3, 1:27 PM EDTMesoscale DiscussionSPC2 hr
Jun 3, 2:17 PM EDTSpecial Weather StatementCTP28 min
Jun 3, 6:58 PM EDTSpecial Weather StatementCTP47 min
Jun 3, 7:05 PM EDTSevere Thunderstorm WarningCTP40 min
Jun 5, 3:30 PM EDTFire Weather WatchCTP17 hr
Jun 6, 8:26 AM EDTRed Flag WarningCTP12 hr
Jun 16, 2:38 PM EDTSpecial Weather StatementCTP37 min
Jun 16, 3:11 PM EDTSpecial Weather StatementCTP34 min
Jun 25, 10:48 PM EDTSpecial Weather StatementCTP27 min
Jun 26, 1:11 PM EDTSevere Thunderstorm WatchSPC11 hr
Jun 26, 3:10 PM EDTSpecial Weather StatementCTP35 min
Jun 26, 5:52 PM EDTSpecial Weather StatementCTP38 min
Jul 1, 1:54 PM EDTMesoscale DiscussionSPC2 hr
Jul 1, 4:55 PM EDTAreal Flood AdvisoryCTP2 hr
Jul 1, 5:24 PM EDTAreal Flood AdvisoryCTP2 hr
Jul 13, 10:04 PM EDTSevere Thunderstorm WarningCTP56 min
Jul 14, 2:02 PM EDTSpecial Weather StatementCTP28 min
Jul 14, 2:29 PM EDTSpecial Weather StatementCTP31 min
Jul 14, 2:51 PM EDTSpecial Weather StatementCTP24 min
Jul 15, 5:50 AM EDTDense Fog AdvisoryCTP3 hr
Jul 15, 9:45 PM EDTSpecial Weather StatementCTP45 min
Jul 17, 4:04 PM EDTSpecial Weather StatementCTP41 min
Jul 20, 6:19 PM EDTSevere Thunderstorm WatchSPC9 hr
Jul 20, 9:58 PM EDTSpecial Weather StatementCTP47 min
Jul 20, 10:05 PM EDTSevere Thunderstorm WarningCTP25 min
Jul 20, 10:37 PM EDTSpecial Weather StatementCTP53 min
Jul 20, 10:57 PM EDTSevere Thunderstorm WarningCTP63 min
Jul 20, 11:06 PM EDTAreal Flood AdvisoryCTP2 hr
Jul 20, 11:46 PM EDTSevere Thunderstorm WarningCTP74 min
Jul 26, 5:36 AM EDTHeat AdvisoryCTP62 hr
Jul 29, 6:06 AM EDTMesoscale DiscussionSPC114 min
Aug 3, 7:10 PM EDTSpecial Weather StatementCTP35 min
Aug 4, 11:21 AM EDTMesoscale DiscussionSPC114 min
Aug 4, 12:10 PM EDTSevere Thunderstorm WatchSPC10 hr
Aug 4, 3:05 PM EDTSpecial Weather StatementCTP40 min
Aug 4, 6:13 PM EDTMesoscale DiscussionSPC2 hr
Aug 7, 12:14 PM EDTMesoscale DiscussionSPC2 hr
Aug 7, 1:20 PM EDTTornado WatchSPC11 hr
Aug 7, 1:49 PM EDTSevere Thunderstorm WarningCTP41 min
Aug 12, 12:50 PM EDTTornado WatchSPC8 hr
Aug 12, 4:04 PM EDTMesoscale DiscussionSPC116 min
Aug 12, 8:06 PM EDTSevere Thunderstorm WatchSPC4 hr
Aug 12, 8:36 PM EDTSevere Thunderstorm WarningCTP39 min
Aug 12, 9:10 PM EDTSevere Thunderstorm WarningCTP50 min
Aug 25, 2:02 AM EDTMesoscale DiscussionSPC118 min
Aug 29, 1:57 PM EDTFlood WatchCTP14 hr
Sep 7, 11:58 AM EDTMesoscale DiscussionSPC3 hr
Sep 8, 1:44 PM EDTSpecial Weather StatementCTP31 min
Sep 8, 6:58 PM EDTSpecial Weather StatementCTP32 min
Sep 8, 7:46 PM EDTAreal Flood AdvisoryCTP2 hr
Sep 9, 2:08 PM EDTMesoscale DiscussionSPC3 hr
Sep 9, 2:31 PM EDTSevere Thunderstorm WarningCTP29 min
Sep 9, 3:13 PM EDTSpecial Weather StatementCTP32 min
Sep 9, 3:47 PM EDTSevere Thunderstorm WarningCTP43 min
Sep 9, 4:12 PM EDTSevere Thunderstorm WarningCTP33 min
Sep 9, 4:23 PM EDTSevere Thunderstorm WatchSPC5 hr
Oct 1, 2:31 AM EDTDense Fog AdvisoryCTP7 hr
Oct 3, 3:46 AM EDTDense Fog AdvisoryCTP6 hr
Oct 4, 2:53 AM EDTDense Fog AdvisoryCTP7 hr
Oct 21, 3:45 PM EDTFreeze WatchCTP23 hr
Oct 23, 1:30 PM EDTFrost AdvisoryCTP20 hr
Oct 30, 3:02 AM EDTFreeze WarningCTP30 hr
Nov 20, 3:14 AM ESTWinter Weather AdvisoryCTP35 hr
Nov 27, 10:43 PM ESTSpecial Weather StatementCTP32 min
Nov 27, 11:24 PM ESTSpecial Weather StatementCTP36 min
Dec 3, 5:17 PM ESTSpecial Weather StatementCTP28 min
Dec 3, 5:28 PM ESTSpecial Weather StatementCTP32 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 archive20222024

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.