Alert archive / Pennsylvania / Blair County

Weather alerts in Blair County, Pennsylvania, 2019

158 weather alerts in 2019, 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 2019. Tap one for its archive.

Alerts
158
Warnings
32
Watches
24
Advisories
39
Busiest month
May39 alerts
Busiest day
May 29, 201913 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 Blair County in 2019 had a tornado report inside them.

Blair County, 2019

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings10100%0
Severe thunderstorm warnings171418%2352%17 min
Flash flood warnings10100%0

Each office's whole area, 2019

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS State College, PA: tornado warnings21671%1735%7 min
NWS State College, PA: severe thunderstorm warnings28417738%46881%22 min
NWS State College, PA: flash flood warnings221245%3087%49 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 7, 4:04 AM ESTWinter Weather AdvisoryCTP32 hr
Jan 9, 3:45 PM ESTSpecial Weather StatementCTP60 min
Jan 9, 4:55 PM ESTSpecial Weather StatementCTP35 min
Jan 11, 2:45 PM ESTWinter Weather AdvisoryCTP52 hr
Jan 17, 4:17 AM ESTWinter Storm WatchCTP33 hr
Jan 18, 4:45 AM ESTWinter Storm WarningCTP53 hr
Jan 19, 6:24 PM ESTMesoscale DiscussionSPC3 hr
Jan 19, 9:33 PM ESTMesoscale DiscussionSPC3 hr
Jan 20, 4:06 AM ESTWind Chill AdvisoryCTP33 hr
Jan 22, 12:45 PM ESTWinter Weather AdvisoryCTP30 hr
Jan 25, 9:25 AM ESTSpecial Weather StatementCTP35 min
Jan 25, 9:40 AM ESTSnow Squall WarningCTP35 min
Jan 29, 2:31 PM ESTWind Chill AdvisoryCTP63 hr
Jan 30, 8:25 AM ESTSnow Squall WarningCTP50 min
Jan 30, 9:13 AM ESTSnow Squall WarningCTP47 min
Feb 7, 1:37 AM ESTDense Fog AdvisoryCTP9 hr
Feb 10, 12:25 PM ESTWinter Weather AdvisoryCTP64 hr
Feb 10, 3:55 PM ESTWinter Storm WatchCTP21 hr
Feb 11, 3:50 AM ESTWinter Storm WarningCTP38 hr
Feb 11, 3:50 AM ESTWinter Weather AdvisoryCTP9 hr
Feb 12, 4:16 AM ESTMesoscale DiscussionSPC6 hr
Feb 12, 10:48 AM ESTMesoscale DiscussionSPC4 hr
Feb 12, 2:20 PM ESTWind AdvisoryCTP28 hr
Feb 17, 4:05 AM ESTWinter Weather AdvisoryCTP33 hr
Feb 18, 2:38 PM ESTWinter Storm WatchCTP24 hr
Feb 19, 2:34 PM ESTWinter Storm WarningCTP37 hr
Feb 20, 5:55 AM ESTMesoscale DiscussionSPC6 hr
Feb 20, 6:32 PM ESTMesoscale DiscussionSPC4 hr
Feb 22, 4:12 AM ESTHigh Wind WatchCTP34 hr
Feb 23, 10:29 AM ESTWinter Weather AdvisoryCTP21 hr
Feb 23, 2:24 PM ESTHigh Wind WarningCTP47 hr
Feb 25, 12:54 PM ESTWind AdvisoryCTP6 hr
Feb 28, 10:21 AM ESTWinter Weather AdvisoryCTP20 hr
Mar 1, 3:06 PM ESTWinter Storm WatchCTP37 hr
Mar 2, 2:37 PM ESTWinter Weather AdvisoryCTP34 hr
Mar 22, 4:19 AM EDTWind AdvisoryCTP15 hr
Mar 31, 11:16 PM EDTSpecial Weather StatementCTP59 min
Apr 2, 10:53 AM EDTFire Weather WatchCTP16 hr
Apr 3, 3:07 AM EDTRed Flag WarningCTP18 hr
Apr 12, 4:44 PM EDTSpecial Weather StatementCTP46 min
Apr 14, 5:57 PM EDTMesoscale DiscussionSPC63 min
Apr 14, 6:46 PM EDTTornado WatchSPC8 hr
Apr 14, 9:14 PM EDTMesoscale DiscussionSPC61 min
Apr 14, 10:17 PM EDTSevere Thunderstorm WarningCTP43 min
Apr 14, 10:58 PM EDTSevere Thunderstorm WarningCTP47 min
Apr 15, 3:49 AM EDTWind AdvisoryCTP16 hr
Apr 23, 8:37 PM EDTSpecial Weather StatementCTP38 min
Apr 23, 8:40 PM EDTSevere Thunderstorm WarningCTP35 min
Apr 26, 1:24 PM EDTSpecial Weather StatementCTP66 min
Apr 27, 4:12 AM EDTWind AdvisoryCTP11 hr
May 3, 6:10 PM EDTSpecial Weather StatementCTP35 min
May 19, 1:27 PM EDTMesoscale DiscussionSPC2 hr
May 19, 1:33 PM EDTSpecial Weather StatementCTP27 min
May 19, 2:10 PM EDTSpecial Weather StatementCTP50 min
May 19, 2:23 PM EDTSevere Thunderstorm WarningCTP37 min
May 19, 2:36 PM EDTSevere Thunderstorm WatchSPC8 hr
May 19, 6:33 PM EDTAreal Flood AdvisoryCTP3 hr
May 23, 11:52 AM EDTMesoscale DiscussionSPC83 min
May 23, 9:20 PM EDTSevere Thunderstorm WatchSPC3 hr
May 23, 9:24 PM EDTMesoscale DiscussionSPC2 hr
May 23, 10:59 PM EDTSpecial Weather StatementCTP31 min
May 25, 12:53 PM EDTMesoscale DiscussionSPC2 hr
May 25, 8:16 PM EDTMesoscale DiscussionSPC59 min
May 25, 9:27 PM EDTSpecial Weather StatementCTP48 min
May 26, 11:14 AM EDTMesoscale DiscussionSPC3 hr
May 28, 1:02 PM EDTMesoscale DiscussionSPC118 min
May 28, 1:13 PM EDTFlash Flood WatchCTP32 hr
May 28, 1:48 PM EDTTornado WatchSPC8 hr
May 28, 3:18 PM EDTSevere Thunderstorm WarningCTP57 min
May 28, 3:40 PM EDTSevere Thunderstorm WarningCTP65 min
May 28, 4:43 PM EDTMesoscale DiscussionSPC2 hr
May 28, 4:45 PM EDTSevere Thunderstorm WarningCTP60 min
May 28, 5:20 PM EDTTornado WarningCTP40 min
May 28, 5:49 PM EDTSevere Thunderstorm WarningCTP56 min
May 28, 7:12 PM EDTAreal Flood AdvisoryCTP3 hr
May 28, 8:07 PM EDTMesoscale DiscussionSPC113 min
May 28, 10:13 PM EDTAreal Flood AdvisoryCTP3 hr
May 29, 1:02 AM EDTAreal Flood AdvisoryCTP3 hr
May 29, 12:06 PM EDTMesoscale DiscussionSPC84 min
May 29, 12:51 PM EDTSpecial Weather StatementCTP24 min
May 29, 1:10 PM EDTTornado WatchSPC8 hr
May 29, 1:12 PM EDTSpecial Weather StatementCTP33 min
May 29, 1:27 PM EDTSevere Thunderstorm WarningCTP33 min
May 29, 2:43 PM EDTSevere Thunderstorm WarningCTP47 min
May 29, 3:02 PM EDTAreal Flood AdvisoryCTP3 hr
May 29, 3:10 PM EDTSevere Thunderstorm WarningCTP39 min
May 29, 3:30 PM EDTSevere Thunderstorm WarningCTP60 min
May 29, 3:47 PM EDTMesoscale DiscussionSPC118 min
May 30, 3:48 AM EDTFlash Flood WatchCTP18 hr
Jun 13, 3:51 PM EDTMesoscale DiscussionSPC114 min
Jun 17, 3:30 AM EDTFlash Flood WatchCTP42 hr
Jun 19, 1:49 PM EDTFlash Flood WatchCTP10 hr
Jun 20, 4:17 AM EDTFlash Flood WatchCTP24 hr
Jun 24, 7:17 PM EDTMesoscale DiscussionSPC2 hr
Jun 29, 12:08 PM EDTSevere Thunderstorm WatchSPC9 hr
Jun 29, 1:45 PM EDTMesoscale DiscussionSPC90 min
Jul 2, 3:10 PM EDTMesoscale DiscussionSPC95 min
Jul 2, 3:41 PM EDTSpecial Weather StatementCTP49 min
Jul 2, 4:18 PM EDTSevere Thunderstorm WarningCTP57 min
Jul 4, 11:51 AM EDTFlash Flood WatchCTP7 hr
Jul 5, 5:25 AM EDTFlash Flood WatchCTP16 hr
Jul 6, 11:49 AM EDTFlash Flood WatchCTP8 hr
Jul 6, 1:48 PM EDTMesoscale DiscussionSPC2 hr
Jul 6, 3:26 PM EDTSpecial Weather StatementCTP49 min
Jul 6, 3:59 PM EDTSpecial Weather StatementCTP46 min
Jul 7, 12:01 PM EDTFlash Flood WatchCTP22 hr
Jul 7, 5:07 PM EDTAreal Flood AdvisoryCTP3 hr
Jul 9, 3:48 AM EDTDense Fog AdvisoryCTP5 hr
Jul 17, 1:03 PM EDTMesoscale DiscussionSPC2 hr
Jul 18, 3:02 PM EDTExcessive Heat WarningCTP3 days
Jul 18, 3:02 PM EDTHeat AdvisoryCTP53 hr
Jul 20, 4:22 AM EDTHeat AdvisoryCTP40 hr
Jul 20, 7:14 PM EDTSpecial Weather StatementCTP46 min
Jul 23, 4:33 PM EDTSpecial Weather StatementCTP27 min
Jul 30, 12:59 PM EDTMesoscale DiscussionSPC2 hr
Aug 2, 1:48 PM EDTAreal Flood AdvisoryCTP3 hr
Aug 2, 2:01 PM EDTSpecial Weather StatementCTP59 min
Aug 2, 2:45 PM EDTSpecial Weather StatementCTP45 min
Aug 2, 3:11 PM EDTAreal Flood AdvisoryCTP3 hr
Aug 2, 3:24 PM EDTFlash Flood WarningCTP3 hr
Aug 3, 12:40 AM EDTDense Fog AdvisoryCTP8 hr
Aug 8, 12:37 PM EDTSevere Thunderstorm WatchSPC7 hr
Aug 15, 1:15 PM EDTMesoscale DiscussionSPC2 hr
Aug 15, 5:11 PM EDTSpecial Weather StatementCTP49 min
Aug 15, 5:22 PM EDTSevere Thunderstorm WarningCTP53 min
Aug 15, 5:53 PM EDTSevere Thunderstorm WarningCTP67 min
Aug 15, 7:08 PM EDTSpecial Weather StatementCTP37 min
Aug 17, 6:44 PM EDTMesoscale DiscussionSPC2 hr
Aug 18, 4:55 PM EDTSpecial Weather StatementCTP35 min
Aug 21, 12:54 AM EDTSpecial Weather StatementCTP36 min
Aug 22, 2:53 PM EDTMesoscale DiscussionSPC2 hr
Aug 22, 3:58 PM EDTSpecial Weather StatementCTP77 min
Aug 22, 4:27 PM EDTSevere Thunderstorm WarningCTP63 min
Sep 2, 2:45 AM EDTSpecial Weather StatementCTP30 min
Sep 3, 5:27 AM EDTDense Fog AdvisoryCTP4 hr
Sep 11, 3:08 PM EDTMesoscale DiscussionSPC2 hr
Sep 11, 7:30 PM EDTSevere Thunderstorm WarningCTP75 min
Sep 12, 2:02 PM EDTMesoscale DiscussionSPC118 min
Sep 28, 5:51 PM EDTMesoscale DiscussionSPC114 min
Oct 4, 6:08 AM EDTFrost AdvisoryCTP27 hr
Oct 8, 3:15 AM EDTDense Fog AdvisoryCTP6 hr
Oct 12, 3:06 AM EDTFrost AdvisoryCTP31 hr
Oct 16, 4:40 AM EDTWind AdvisoryCTP37 hr
Oct 18, 2:48 AM EDTFreeze WarningCTP29 hr
Oct 27, 7:37 AM EDTSpecial Weather StatementCTP23 min
Oct 27, 8:06 AM EDTSpecial Weather StatementCTP54 min
Oct 31, 4:32 AM EDTWind AdvisoryCTP29 hr
Oct 31, 2:56 PM EDTTornado WatchSPC10 hr
Nov 26, 2:32 PM ESTWind AdvisoryCTP45 hr
Nov 29, 2:17 PM ESTWinter Storm WatchCTP29 hr
Nov 30, 3:54 AM ESTIce Storm WarningCTP16 hr
Nov 30, 7:29 PM ESTIce Storm WarningCTP23 hr
Dec 1, 5:45 AM ESTMesoscale DiscussionSPC6 hr
Dec 11, 8:27 PM ESTSpecial Weather StatementCTP33 min
Dec 13, 2:26 AM ESTWinter Weather AdvisoryCTP12 hr
Dec 14, 8:20 AM ESTDense Fog AdvisoryCTP3 hr
Dec 16, 4:24 AM ESTWinter Weather AdvisoryCTP31 hr
Dec 18, 2:30 PM ESTSnow Squall WarningCTP75 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 archive20182020

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.