Alert archive / Pennsylvania / Union County

Weather alerts in Union County, Pennsylvania, 2013

164 weather alerts in 2013, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Union County and its neighbors

Each county as a circle sized by its count in 2013. Tap one for its archive.

Alerts
164
Warnings
35
Watches
25
Advisories
36
Busiest month
June30 alerts
Busiest day
June 27, 20138 alerts

Over time

By month

Warning verification

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

Union County, 2013

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings282414%367%35 min
Flash flood warnings110%2100%13 min

Each office's whole area, 2013

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS State College, PA: tornado warnings7271%633%5 min
NWS State College, PA: severe thunderstorm warnings21214930%37187%29 min
NWS State College, PA: flash flood warnings332330%7292%72 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 11, 9:49 PM ESTDense Fog AdvisoryCTP13 hr
Jan 12, 7:22 PM ESTDense Fog AdvisoryCTP17 hr
Jan 13, 4:40 PM ESTDense Fog AdvisoryCTP14 hr
Jan 15, 4:02 AM ESTWinter Weather AdvisoryCTP31 hr
Jan 15, 8:36 PM ESTMesoscale DiscussionSPC4 hr
Jan 18, 1:31 AM ESTSpecial Weather StatementCTP29 min
Jan 27, 4:12 AM ESTWinter Weather AdvisoryCTP39 hr
Jan 28, 7:33 AM ESTMesoscale DiscussionSPC5 hr
Jan 28, 9:44 AM ESTSpecial Weather StatementCTP76 min
Jan 29, 2:58 PM ESTFlood WatchCTP37 hr
Jan 29, 10:15 PM ESTDense Fog AdvisoryCTP11 hr
Jan 30, 9:32 AM ESTWind AdvisoryCTP32 hr
Jan 30, 10:19 AM ESTMesoscale DiscussionSPC86 min
Jan 31, 8:39 AM ESTSpecial Weather StatementCTP51 min
Jan 31, 9:28 AM ESTSpecial Weather StatementCTP62 min
Jan 31, 4:33 PM ESTSpecial Weather StatementCTP57 min
Jan 31, 9:42 PM ESTSpecial Weather StatementCTP2 hr
Feb 6, 2:03 PM ESTWinter Storm WatchCTP24 hr
Feb 7, 2:11 PM ESTWinter Weather AdvisoryCTP37 hr
Feb 10, 1:10 PM ESTFreezing Rain AdvisoryCTP20 hr
Feb 19, 3:01 PM ESTSpecial Weather StatementCTP44 min
Feb 21, 2:53 PM ESTWinter Weather AdvisoryCTP45 hr
Mar 13, 12:14 PM EDTSpecial Weather StatementCTP61 min
Mar 17, 2:47 PM EDTWinter Weather AdvisoryCTP41 hr
Mar 24, 3:55 AM EDTWinter Weather AdvisoryCTP40 hr
Apr 2, 3:47 PM EDTFire Weather WatchCTP11 hr
Apr 3, 3:16 AM EDTRed Flag WarningCTP17 hr
Apr 5, 11:14 AM EDTRed Flag WarningCTP9 hr
Apr 10, 1:33 PM EDTMesoscale DiscussionSPC117 min
Apr 10, 4:02 PM EDTSevere Thunderstorm WarningCTP58 min
Apr 10, 4:38 PM EDTSevere Thunderstorm WarningCTP52 min
Apr 10, 5:59 PM EDTMesoscale DiscussionSPC61 min
Apr 10, 8:04 PM EDTSevere Thunderstorm WarningCTP41 min
Apr 10, 8:28 PM EDTMesoscale DiscussionSPC2 hr
Apr 10, 8:30 PM EDTSevere Thunderstorm WarningCTP60 min
Apr 19, 3:36 PM EDTMesoscale DiscussionSPC54 min
Apr 19, 3:55 PM EDTTornado WatchSPC6 hr
Apr 19, 5:59 PM EDTSpecial Weather StatementCTP46 min
Apr 19, 6:02 PM EDTMesoscale DiscussionSPC58 min
Apr 19, 6:22 PM EDTSevere Thunderstorm WarningCTP83 min
Apr 24, 3:36 PM EDTMesoscale DiscussionSPC84 min
Apr 24, 4:37 PM EDTSevere Thunderstorm WarningCTP53 min
Apr 24, 4:55 PM EDTSevere Thunderstorm WatchSPC3 hr
Apr 24, 5:32 PM EDTSpecial Weather StatementCTP58 min
Apr 24, 8:21 PM EDTSpecial Weather StatementCTP54 min
Apr 24, 9:04 PM EDTSpecial Weather StatementCTP71 min
May 8, 10:57 AM EDTAreal Flood AdvisoryCTP3 hr
May 8, 11:32 AM EDTFlash Flood WarningCTP3 hr
May 9, 4:09 AM EDTFlash Flood WatchCTP10 hr
May 12, 3:34 AM EDTFrost AdvisoryCTP28 hr
May 12, 8:53 PM EDTFreeze WatchCTP7 hr
May 13, 3:42 AM EDTFreeze WarningCTP29 hr
May 22, 3:53 PM EDTMesoscale DiscussionSPC67 min
May 22, 6:20 PM EDTMesoscale DiscussionSPC85 min
May 22, 7:06 PM EDTSevere Thunderstorm WarningCTP54 min
May 22, 7:25 PM EDTSevere Thunderstorm WarningCTP65 min
May 22, 7:58 PM EDTSevere Thunderstorm WarningCTP77 min
May 23, 6:08 PM EDTSpecial Weather StatementCTP37 min
May 25, 6:44 AM EDTRed Flag WarningCTP12 hr
May 29, 5:20 AM EDTDense Fog AdvisoryCTP4 hr
May 29, 11:38 AM EDTMesoscale DiscussionSPC2 hr
Jun 10, 11:47 AM EDTFlood WatchCTP8 hr
Jun 12, 12:41 PM EDTFlood WatchCTP27 hr
Jun 13, 3:58 AM EDTSevere Thunderstorm WatchSPC7 hr
Jun 13, 4:21 AM EDTSpecial Weather StatementCTP54 min
Jun 13, 5:27 AM EDTMesoscale DiscussionSPC2 hr
Jun 13, 6:15 AM EDTSevere Thunderstorm WarningCTP75 min
Jun 13, 6:30 AM EDTAreal Flood AdvisoryCTP2 hr
Jun 13, 7:41 AM EDTAreal Flood AdvisoryCTP2 hr
Jun 25, 12:22 PM EDTMesoscale DiscussionSPC2 hr
Jun 25, 5:27 PM EDTMesoscale DiscussionSPC93 min
Jun 25, 6:20 PM EDTSevere Thunderstorm WatchSPC5 hr
Jun 25, 7:36 PM EDTSevere Thunderstorm WarningCTP54 min
Jun 25, 8:19 PM EDTSevere Thunderstorm WarningCTP56 min
Jun 27, 9:45 AM EDTFlash Flood WatchCTP12 hr
Jun 27, 1:04 PM EDTMesoscale DiscussionSPC116 min
Jun 27, 1:58 PM EDTTornado WatchSPC7 hr
Jun 27, 3:28 PM EDTSevere Thunderstorm WarningCTP77 min
Jun 27, 3:57 PM EDTMesoscale DiscussionSPC93 min
Jun 27, 4:08 PM EDTSpecial Weather StatementCTP67 min
Jun 27, 4:45 PM EDTSevere Thunderstorm WarningCTP60 min
Jun 27, 5:17 PM EDTSevere Thunderstorm WarningCTP58 min
Jun 27, 8:08 PM EDTAreal Flood AdvisoryCTP3 hr
Jun 28, 1:02 PM EDTMesoscale DiscussionSPC118 min
Jun 28, 2:12 PM EDTSpecial Weather StatementCTP33 min
Jun 28, 2:25 PM EDTAreal Flood AdvisoryCTP4 hr
Jun 28, 3:12 PM EDTSevere Thunderstorm WarningCTP63 min
Jun 28, 3:30 PM EDTMesoscale DiscussionSPC2 hr
Jun 30, 11:48 AM EDTMesoscale DiscussionSPC2 hr
Jun 30, 2:01 PM EDTFlash Flood WatchCTP56 hr
Jun 30, 2:33 PM EDTMesoscale DiscussionSPC2 hr
Jul 2, 7:09 PM EDTAreal Flood AdvisoryCTP3 hr
Jul 7, 12:48 PM EDTMesoscale DiscussionSPC117 min
Jul 7, 1:16 PM EDTSevere Thunderstorm WatchSPC6 hr
Jul 7, 3:19 PM EDTMesoscale DiscussionSPC116 min
Jul 7, 4:06 PM EDTSevere Thunderstorm WarningCTP54 min
Jul 7, 4:20 PM EDTSevere Thunderstorm WarningCTP55 min
Jul 7, 4:45 PM EDTSevere Thunderstorm WarningCTP60 min
Jul 10, 3:45 PM EDTMesoscale DiscussionSPC30 min
Jul 10, 3:56 PM EDTSevere Thunderstorm WatchSPC6 hr
Jul 10, 6:15 PM EDTMesoscale DiscussionSPC90 min
Jul 10, 8:06 PM EDTAreal Flood AdvisoryCTP114 min
Jul 10, 8:26 PM EDTSpecial Weather StatementCTP49 min
Jul 10, 9:02 PM EDTMesoscale DiscussionSPC88 min
Jul 17, 1:52 PM EDTHeat AdvisoryCTP31 hr
Jul 18, 12:48 PM EDTHeat AdvisoryCTP31 hr
Jul 18, 6:28 PM EDTMesoscale DiscussionSPC2 hr
Jul 18, 6:54 PM EDTSpecial Weather StatementCTP36 min
Jul 27, 5:25 PM EDTMesoscale DiscussionSPC95 min
Jul 27, 5:57 PM EDTAreal Flood AdvisoryCTP3 hr
Aug 7, 5:52 PM EDTMesoscale DiscussionSPC83 min
Aug 20, 3:48 AM EDTDense Fog AdvisoryCTP5 hr
Aug 22, 2:03 PM EDTMesoscale DiscussionSPC2 hr
Aug 22, 6:47 PM EDTSpecial Weather StatementCTP28 min
Sep 2, 3:18 PM EDTSevere Thunderstorm WatchSPC7 hr
Sep 2, 6:52 PM EDTMesoscale DiscussionSPC113 min
Sep 11, 11:42 AM EDTMesoscale DiscussionSPC63 min
Sep 11, 12:33 PM EDTSevere Thunderstorm WatchSPC8 hr
Sep 11, 2:47 PM EDTMesoscale DiscussionSPC58 min
Sep 11, 3:52 PM EDTSpecial Weather StatementCTP53 min
Sep 11, 4:06 PM EDTSevere Thunderstorm WarningCTP54 min
Sep 11, 5:21 PM EDTSpecial Weather StatementCTP54 min
Sep 12, 12:02 PM EDTMesoscale DiscussionSPC58 min
Sep 12, 12:37 PM EDTSevere Thunderstorm WatchSPC7 hr
Sep 12, 2:00 PM EDTSevere Thunderstorm WarningCTP60 min
Sep 12, 2:41 PM EDTSevere Thunderstorm WarningCTP64 min
Sep 12, 2:41 PM EDTMesoscale DiscussionSPC64 min
Sep 12, 2:56 PM EDTSevere Thunderstorm WarningCTP64 min
Sep 12, 3:28 PM EDTSevere Thunderstorm WarningCTP47 min
Sep 20, 5:47 AM EDTDense Fog AdvisoryCTP3 hr
Oct 7, 8:10 AM EDTMesoscale DiscussionSPC2 hr
Oct 7, 8:56 AM EDTTornado WatchSPC8 hr
Oct 7, 9:44 AM EDTSpecial Weather StatementCTP46 min
Oct 7, 10:28 AM EDTSpecial Weather StatementCTP47 min
Oct 7, 10:39 AM EDTSevere Thunderstorm WarningCTP66 min
Oct 10, 10:54 PM EDTAreal Flood AdvisoryCTP3 hr
Oct 11, 1:37 AM EDTAreal Flood AdvisoryCTP14 hr
Oct 11, 3:30 PM EDTAreal Flood AdvisoryCTP4 hr
Oct 17, 6:36 PM EDTMesoscale DiscussionSPC114 min
Oct 23, 4:03 AM EDTFreeze WatchCTP7 hr
Oct 23, 10:41 AM EDTFreeze WarningCTP22 hr
Oct 31, 9:48 PM EDTWind AdvisoryCTP16 hr
Nov 1, 3:37 AM EDTMesoscale DiscussionSPC83 min
Nov 1, 4:17 AM EDTSevere Thunderstorm WatchSPC4 hr
Nov 1, 5:38 AM EDTSevere Thunderstorm WarningCTP52 min
Nov 1, 5:41 AM EDTMesoscale DiscussionSPC94 min
Nov 1, 6:29 AM EDTSevere Thunderstorm WarningCTP61 min
Nov 17, 10:24 PM ESTMesoscale DiscussionSPC66 min
Nov 17, 11:06 PM ESTSevere Thunderstorm WatchSPC4 hr
Nov 18, 12:20 AM ESTSevere Thunderstorm WarningCTP70 min
Nov 23, 4:49 PM ESTSpecial Weather StatementCTP86 min
Nov 23, 5:46 PM ESTSpecial Weather StatementCTP29 min
Nov 25, 3:20 PM ESTWinter Weather AdvisoryCTP37 hr
Dec 4, 6:26 AM ESTDense Fog AdvisoryCTP4 hr
Dec 5, 12:11 PM ESTWinter Weather AdvisoryCTP37 hr
Dec 6, 7:41 PM ESTMesoscale DiscussionSPC6 hr
Dec 7, 6:13 PM ESTWinter Weather AdvisoryCTP40 hr
Dec 9, 2:21 PM ESTWinter Weather AdvisoryCTP21 hr
Dec 12, 9:08 PM ESTWinter Storm WatchCTP14 hr
Dec 13, 11:32 AM ESTWinter Storm WarningCTP40 hr
Dec 14, 3:02 PM ESTMesoscale DiscussionSPC6 hr
Dec 16, 2:52 PM ESTWinter Weather AdvisoryCTP19 hr
Dec 22, 3:37 AM ESTSevere Thunderstorm WatchSPC5 hr
Dec 22, 6:14 AM ESTMesoscale DiscussionSPC61 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 archive20122014

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.