Alert archive / Pennsylvania / Union County

Weather alerts in Union County, Pennsylvania, 2010

169 weather alerts in 2010, 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 2010. Tap one for its archive.

Alerts
169
Warnings
42
Watches
26
Advisories
36
Busiest month
July31 alerts
Busiest day
December 1, 201011 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, 2010

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings151033%1100%49 min
Flash flood warnings10100%0

Each office's whole area, 2010

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS State College, PA: tornado warnings17288%650%25 min
NWS State College, PA: severe thunderstorm warnings21313138%31985%27 min
NWS State College, PA: flash flood warnings22959%2471%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 2, 3:16 PM ESTWind AdvisoryCTP28 hr
Jan 8, 1:37 PM ESTSpecial Weather StatementCTP53 min
Jan 16, 2:48 PM ESTFreezing Rain AdvisoryCTP14 hr
Jan 16, 7:24 PM ESTWinter Weather AdvisoryCTP32 hr
Jan 23, 2:56 PM ESTFlood WatchCTP48 hr
Jan 24, 9:23 PM ESTWind AdvisoryCTP15 hr
Jan 25, 5:38 AM ESTAreal Flood WarningCTP24 hr
Jan 25, 9:27 AM ESTFlash Flood WarningCTP3 hr
Jan 25, 10:19 AM ESTRiver Flood WarningCTP17 hr
Jan 25, 3:34 PM ESTRiver Flood WarningCTP37 hr
Jan 25, 3:34 PM ESTRiver Flood WarningCTP37 hr
Jan 25, 3:34 PM ESTRiver Flood WarningCTP37 hr
Jan 25, 9:26 PM ESTRiver Flood WarningCTP14 hr
Jan 25, 9:26 PM ESTRiver Flood WarningCTP31 hr
Jan 26, 5:27 AM ESTAreal Flood WarningCTP6 hr
Feb 4, 3:09 PM ESTWinter Storm WatchCTP13 hr
Feb 4, 3:09 PM ESTWinter Storm WarningCTP46 hr
Feb 5, 3:40 AM ESTWinter Weather AdvisoryCTP30 hr
Feb 7, 9:31 PM ESTWinter Storm WatchCTP30 hr
Feb 8, 3:56 PM ESTWinter Storm WarningCTP54 hr
Feb 15, 4:05 AM ESTWinter Weather AdvisoryCTP31 hr
Feb 22, 7:15 PM ESTWinter Weather AdvisoryCTP14 hr
Feb 23, 8:21 PM ESTWinter Storm WatchCTP29 hr
Feb 24, 3:15 PM ESTWinter Weather AdvisoryCTP48 hr
Mar 10, 4:24 AM ESTFlood WatchCTP4 days
Mar 13, 10:09 AM ESTWind AdvisoryCTP12 hr
Mar 13, 4:51 PM ESTAreal Flood AdvisoryCTP7 hr
Mar 13, 8:56 PM ESTRiver Flood WarningCTP24 hr
Mar 28, 2:19 PM EDTFlood WatchCTP12 hr
Apr 7, 3:43 AM EDTRed Flag WarningCTP15 hr
Apr 8, 2:57 PM EDTMesoscale DiscussionSPC63 min
Apr 8, 4:48 PM EDTSevere Thunderstorm WatchSPC5 hr
Apr 8, 5:46 PM EDTSevere Thunderstorm WarningCTP59 min
Apr 8, 6:34 PM EDTSevere Thunderstorm WarningCTP41 min
Apr 13, 2:52 PM EDTFrost AdvisoryCTP17 hr
Apr 16, 1:28 PM EDTSevere Thunderstorm WatchSPC7 hr
Apr 16, 4:34 PM EDTMesoscale DiscussionSPC86 min
Apr 16, 4:49 PM EDTSevere Thunderstorm WarningCTP56 min
Apr 16, 6:14 PM EDTMesoscale DiscussionSPC61 min
Apr 19, 2:33 PM EDTFrost AdvisoryCTP17 hr
Apr 22, 4:33 AM EDTDense Fog AdvisoryCTP4 hr
Apr 23, 2:41 PM EDTFrost AdvisoryCTP17 hr
Apr 25, 4:37 PM EDTSevere Thunderstorm WatchSPC6 hr
Apr 25, 4:50 PM EDTSpecial Weather StatementCTP25 min
Apr 25, 5:31 PM EDTSpecial Weather StatementCTP29 min
Apr 25, 6:16 PM EDTMesoscale DiscussionSPC89 min
Apr 27, 5:41 AM EDTFreeze WatchCTP9 hr
Apr 27, 2:23 PM EDTFreeze WarningCTP19 hr
Apr 28, 2:36 PM EDTFire Weather WatchCTP15 hr
Apr 29, 5:22 AM EDTRed Flag WarningCTP15 hr
May 4, 10:53 AM EDTMesoscale DiscussionSPC97 min
May 4, 1:18 PM EDTSpecial Weather StatementCTP27 min
May 4, 1:51 PM EDTSpecial Weather StatementCTP39 min
May 4, 1:52 PM EDTSpecial Weather StatementCTP38 min
May 7, 3:41 PM EDTWind AdvisoryCTP31 hr
May 7, 11:42 PM EDTMesoscale DiscussionSPC63 min
May 8, 2:24 PM EDTFreeze WatchCTP14 hr
May 8, 3:48 PM EDTSpecial Weather StatementCTP27 min
May 9, 4:11 AM EDTFreeze WarningCTP28 hr
May 10, 2:50 PM EDTFreeze WarningCTP17 hr
May 14, 1:58 PM EDTSpecial Weather StatementCTP32 min
May 27, 11:28 AM EDTMesoscale DiscussionSPC92 min
May 27, 1:23 PM EDTSevere Thunderstorm WatchSPC8 hr
May 27, 3:39 PM EDTSpecial Weather StatementCTP51 min
May 27, 4:13 PM EDTMesoscale DiscussionSPC62 min
May 27, 8:08 PM EDTMesoscale DiscussionSPC97 min
Jun 4, 2:39 PM EDTSevere Thunderstorm WatchSPC8 hr
Jun 4, 7:03 PM EDTMesoscale DiscussionSPC57 min
Jun 5, 6:28 PM EDTSpecial Weather StatementCTP32 min
Jun 6, 7:05 AM EDTMesoscale DiscussionSPC115 min
Jun 6, 7:51 AM EDTTornado WatchSPC7 hr
Jun 6, 10:29 AM EDTSpecial Weather StatementCTP91 min
Jun 6, 11:31 AM EDTSpecial Weather StatementCTP59 min
Jun 6, 11:48 AM EDTSevere Thunderstorm WarningCTP57 min
Jun 10, 12:26 AM EDTDense Fog AdvisoryCTP7 hr
Jun 22, 11:35 AM EDTMesoscale DiscussionSPC25 min
Jun 22, 3:48 PM EDTMesoscale DiscussionSPC27 min
Jun 24, 9:38 AM EDTMesoscale DiscussionSPC97 min
Jun 24, 10:19 AM EDTSevere Thunderstorm WatchSPC8 hr
Jun 24, 12:16 PM EDTMesoscale DiscussionSPC89 min
Jul 5, 12:46 PM EDTHeat AdvisoryCTP55 hr
Jul 9, 3:54 PM EDTFlash Flood WatchCTP8 hr
Jul 9, 8:40 PM EDTAreal Flood AdvisoryCTP3 hr
Jul 9, 10:22 PM EDTAreal Flood AdvisoryCTP3 hr
Jul 12, 3:21 PM EDTSevere Thunderstorm WarningCTP54 min
Jul 12, 4:10 PM EDTAreal Flood AdvisoryCTP110 min
Jul 14, 5:28 AM EDTAreal Flood AdvisoryCTP3 hr
Jul 16, 1:23 PM EDTMesoscale DiscussionSPC97 min
Jul 19, 1:17 PM EDTMesoscale DiscussionSPC58 min
Jul 21, 11:27 AM EDTSevere Thunderstorm WatchSPC9 hr
Jul 21, 1:59 PM EDTMesoscale DiscussionSPC61 min
Jul 21, 2:36 PM EDTSevere Thunderstorm WarningCTP26 min
Jul 21, 3:41 PM EDTMesoscale DiscussionSPC64 min
Jul 21, 4:44 PM EDTSpecial Weather StatementCTP31 min
Jul 21, 5:09 PM EDTSpecial Weather StatementCTP36 min
Jul 21, 7:00 PM EDTMesoscale DiscussionSPC90 min
Jul 21, 7:35 PM EDTSevere Thunderstorm WatchSPC5 hr
Jul 23, 12:46 PM EDTSevere Thunderstorm WatchSPC7 hr
Jul 23, 4:18 PM EDTHeat AdvisoryCTP29 hr
Jul 23, 6:23 PM EDTMesoscale DiscussionSPC67 min
Jul 23, 9:06 PM EDTMesoscale DiscussionSPC54 min
Jul 24, 12:15 AM EDTSpecial Weather StatementCTP30 min
Jul 24, 6:22 PM EDTMesoscale DiscussionSPC53 min
Jul 24, 6:48 PM EDTTornado WatchSPC4 hr
Jul 24, 8:57 PM EDTSevere Thunderstorm WarningCTP78 min
Jul 24, 10:22 PM EDTMesoscale DiscussionSPC83 min
Jul 25, 10:48 AM EDTMesoscale DiscussionSPC27 min
Jul 25, 12:44 PM EDTSevere Thunderstorm WarningCTP46 min
Jul 25, 12:50 PM EDTMesoscale DiscussionSPC55 min
Jul 25, 1:22 PM EDTSevere Thunderstorm WarningCTP38 min
Jul 29, 3:24 AM EDTSpecial Weather StatementCTP66 min
Aug 4, 11:09 AM EDTHeat AdvisoryCTP9 hr
Aug 4, 7:11 PM EDTSpecial Weather StatementCTP49 min
Aug 16, 8:40 AM EDTMesoscale DiscussionSPC2 hr
Aug 16, 11:14 AM EDTMesoscale DiscussionSPC2 hr
Aug 16, 12:05 PM EDTSevere Thunderstorm WatchSPC9 hr
Sep 19, 5:12 PM EDTSpecial Weather StatementCTP33 min
Sep 22, 1:26 PM EDTMesoscale DiscussionSPC94 min
Sep 22, 2:34 PM EDTSevere Thunderstorm WatchSPC6 hr
Sep 22, 4:00 PM EDTSevere Thunderstorm WarningCTP60 min
Sep 22, 4:46 PM EDTMesoscale DiscussionSPC59 min
Sep 23, 3:45 AM EDTDense Fog AdvisoryCTP2 hr
Sep 28, 8:00 AM EDTMesoscale DiscussionSPC2 hr
Sep 28, 12:02 PM EDTSpecial Weather StatementCTP43 min
Sep 29, 3:16 AM EDTFlood WatchCTP50 hr
Sep 30, 10:31 AM EDTAreal Flood WarningCTP10 hr
Sep 30, 11:07 AM EDTRiver Flood WarningCTP22 hr
Sep 30, 8:06 PM EDTAreal Flood WarningCTP8 hr
Oct 1, 3:59 AM EDTAreal Flood AdvisoryCTP4 hr
Oct 11, 2:56 PM EDTSevere Thunderstorm WarningCTP47 min
Oct 11, 3:15 PM EDTSevere Thunderstorm WarningCTP36 min
Oct 11, 3:19 PM EDTMesoscale DiscussionSPC56 min
Oct 11, 3:33 PM EDTSevere Thunderstorm WarningCTP57 min
Oct 11, 3:38 PM EDTSevere Thunderstorm WatchSPC6 hr
Oct 11, 6:07 PM EDTMesoscale DiscussionSPC83 min
Oct 11, 7:00 PM EDTSevere Thunderstorm WarningCTP60 min
Oct 11, 8:15 PM EDTMesoscale DiscussionSPC60 min
Oct 19, 2:06 PM EDTFrost AdvisoryCTP18 hr
Oct 22, 1:36 PM EDTFrost AdvisoryCTP19 hr
Nov 16, 2:25 PM ESTWind AdvisoryCTP28 hr
Nov 16, 10:36 PM ESTSpecial Weather StatementCTP54 min
Nov 16, 11:30 PM ESTSpecial Weather StatementCTP60 min
Nov 17, 12:50 AM ESTAreal Flood AdvisoryCTP3 hr
Nov 24, 3:10 PM ESTWinter Weather AdvisoryCTP31 hr
Nov 25, 5:02 AM ESTMesoscale DiscussionSPC4 hr
Nov 29, 1:23 PM ESTFlood WatchCTP49 hr
Nov 30, 10:24 PM ESTRiver Flood WarningCTP38 hr
Dec 1, 5:01 AM ESTAreal Flood AdvisoryCTP6 hr
Dec 1, 6:29 AM ESTSevere Thunderstorm WarningCTP46 min
Dec 1, 6:53 AM ESTSpecial Weather StatementCTP52 min
Dec 1, 6:55 AM ESTMesoscale DiscussionSPC65 min
Dec 1, 8:47 AM ESTAreal Flood WarningCTP6 hr
Dec 1, 10:28 AM ESTRiver Flood WarningCTP45 hr
Dec 1, 10:28 AM ESTRiver Flood WarningCTP42 hr
Dec 1, 10:28 AM ESTRiver Flood WarningCTP47 hr
Dec 1, 10:28 AM ESTRiver Flood WarningCTP47 hr
Dec 1, 2:30 PM ESTAreal Flood WarningCTP10 hr
Dec 2, 11:22 PM ESTAreal Flood AdvisoryCTP6 hr
Dec 3, 5:47 AM ESTAreal Flood AdvisoryCTP6 hr
Dec 5, 2:16 PM ESTWinter Weather AdvisoryCTP53 hr
Dec 6, 2:23 AM ESTSpecial Weather StatementCTP3 hr
Dec 6, 10:54 AM ESTSpecial Weather StatementCTP111 min
Dec 6, 11:06 AM ESTSpecial Weather StatementCTP99 min
Dec 6, 12:51 PM ESTSpecial Weather StatementCTP114 min
Dec 7, 3:35 AM ESTSpecial Weather StatementCTP3 hr
Dec 7, 7:23 AM ESTSpecial Weather StatementCTP3 hr
Dec 10, 12:33 PM ESTSpecial Weather StatementCTP2 hr
Dec 11, 10:40 PM ESTFreezing Rain AdvisoryCTP10 hr
Dec 26, 4:31 AM ESTWinter Weather AdvisoryCTP22 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 archive20092011

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.