Alert archive / Pennsylvania / Mifflin County

Weather alerts in Mifflin County, Pennsylvania, 2013

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

Mifflin County and its neighbors

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

Alerts
172
Warnings
28
Watches
28
Advisories
39
Busiest month
June35 alerts
Busiest day
June 13, 20137 alerts

Over time

By month

Warning verification

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

Mifflin County, 2013

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings221818%771%33 min
Flash flood warnings00

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 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 30, 11:46 AM ESTSevere Thunderstorm WarningCTP44 min
Jan 30, 12:24 PM ESTSpecial Weather StatementCTP51 min
Jan 31, 8:39 AM ESTSpecial Weather StatementCTP51 min
Jan 31, 11:53 AM ESTSpecial Weather StatementCTP37 min
Jan 31, 12:40 PM ESTSpecial Weather StatementCTP50 min
Jan 31, 9:42 PM ESTSpecial Weather StatementCTP2 hr
Feb 1, 1:16 AM ESTSpecial Weather StatementCTP59 min
Feb 7, 2:11 PM ESTWinter Weather AdvisoryCTP37 hr
Feb 10, 1:10 PM ESTFreezing Rain AdvisoryCTP20 hr
Feb 13, 4:57 PM ESTSpecial Weather StatementCTP48 min
Feb 13, 5:22 PM ESTWinter Weather AdvisoryCTP5 hr
Feb 18, 2:45 PM ESTWinter Weather AdvisoryCTP21 hr
Feb 19, 3:01 PM ESTSpecial Weather StatementCTP44 min
Feb 21, 2:53 PM ESTWinter Weather AdvisoryCTP45 hr
Mar 4, 2:39 PM ESTWinter Storm WatchCTP21 hr
Mar 5, 11:56 AM ESTWinter Weather AdvisoryCTP26 hr
Mar 13, 11:54 AM EDTSpecial Weather StatementCTP66 min
Mar 17, 2:47 PM EDTWinter Weather AdvisoryCTP41 hr
Mar 24, 3:55 AM EDTWinter Weather AdvisoryCTP40 hr
Mar 25, 5:31 AM EDTMesoscale DiscussionSPC6 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 7, 8:04 PM EDTSpecial Weather StatementCTP41 min
Apr 10, 1:33 PM EDTMesoscale DiscussionSPC117 min
Apr 10, 4:57 PM EDTSpecial Weather StatementCTP48 min
Apr 10, 5:10 PM EDTSevere Thunderstorm WarningCTP65 min
Apr 10, 5:59 PM EDTMesoscale DiscussionSPC61 min
Apr 10, 6:13 PM EDTSevere Thunderstorm WatchSPC5 hr
Apr 10, 7:17 PM EDTSevere Thunderstorm WarningCTP58 min
Apr 10, 8:04 PM EDTSevere Thunderstorm WarningCTP41 min
Apr 10, 8:28 PM EDTMesoscale DiscussionSPC2 hr
Apr 10, 11:11 PM EDTMesoscale DiscussionSPC94 min
Apr 19, 3:55 PM EDTTornado WatchSPC6 hr
Apr 19, 4:10 PM EDTSevere Thunderstorm WarningCTP80 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, 8:25 PM EDTSpecial Weather StatementCTP65 min
Apr 24, 8:27 PM EDTSpecial Weather StatementCTP63 min
May 10, 7:03 PM EDTSpecial Weather StatementCTP27 min
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 15, 5:07 PM EDTMesoscale DiscussionSPC83 min
May 22, 3:53 PM EDTMesoscale DiscussionSPC67 min
May 22, 5:47 PM EDTSevere Thunderstorm WarningCTP58 min
May 22, 6:20 PM EDTMesoscale DiscussionSPC85 min
May 22, 6:39 PM EDTSpecial Weather StatementCTP36 min
May 22, 7:06 PM EDTSevere Thunderstorm WarningCTP54 min
May 23, 5:47 PM EDTSpecial Weather StatementCTP43 min
May 25, 6:44 AM EDTRed Flag WarningCTP12 hr
May 29, 5:20 AM EDTDense Fog AdvisoryCTP4 hr
Jun 10, 11:47 AM EDTFlood WatchCTP8 hr
Jun 10, 2:02 PM EDTTornado WatchSPC10 hr
Jun 10, 4:38 PM EDTMesoscale DiscussionSPC97 min
Jun 10, 6:40 PM EDTSpecial Weather StatementCTP35 min
Jun 12, 12:41 PM EDTFlood WatchCTP27 hr
Jun 13, 2:40 AM EDTMesoscale DiscussionSPC2 hr
Jun 13, 3:24 AM EDTSpecial Weather StatementCTP66 min
Jun 13, 3:58 AM EDTSevere Thunderstorm WatchSPC7 hr
Jun 13, 5:15 AM EDTSevere Thunderstorm WarningCTP60 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 23, 6:05 PM EDTSpecial Weather StatementCTP25 min
Jun 23, 6:36 PM EDTSpecial Weather StatementCTP24 min
Jun 24, 1:16 PM EDTSpecial Weather StatementCTP59 min
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 27, 9:45 AM EDTFlash Flood WatchCTP12 hr
Jun 27, 1:04 PM EDTMesoscale DiscussionSPC116 min
Jun 27, 1:57 PM EDTAreal Flood AdvisoryCTP3 hr
Jun 27, 1:58 PM EDTTornado WatchSPC7 hr
Jun 27, 3:55 PM EDTAreal Flood AdvisoryCTP3 hr
Jun 27, 4:03 PM EDTAreal Flood AdvisoryCTP3 hr
Jun 28, 1:02 PM EDTMesoscale DiscussionSPC118 min
Jun 28, 1:09 PM EDTSevere Thunderstorm WatchSPC7 hr
Jun 28, 2:25 PM EDTAreal Flood AdvisoryCTP4 hr
Jun 28, 2:40 PM EDTSpecial Weather StatementCTP35 min
Jun 28, 3:12 PM EDTSevere Thunderstorm WarningCTP63 min
Jun 28, 3:30 PM EDTMesoscale DiscussionSPC2 hr
Jun 28, 7:11 PM EDTMesoscale DiscussionSPC64 min
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 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, 3:20 PM EDTSevere Thunderstorm WarningCTP55 min
Jul 7, 4:06 PM EDTSevere Thunderstorm WarningCTP54 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, 8:55 PM EDTSpecial Weather StatementCTP65 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 21, 9:52 PM EDTAreal Flood AdvisoryCTP83 min
Jul 27, 5:25 PM EDTMesoscale DiscussionSPC95 min
Aug 7, 5:52 PM EDTMesoscale DiscussionSPC83 min
Aug 7, 8:55 PM EDTAreal Flood AdvisoryCTP3 hr
Aug 20, 3:48 AM EDTDense Fog AdvisoryCTP5 hr
Aug 22, 2:03 PM EDTMesoscale DiscussionSPC2 hr
Aug 28, 6:11 PM EDTAreal Flood AdvisoryCTP3 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, 3:29 PM EDTSpecial Weather StatementCTP46 min
Sep 11, 4:53 PM EDTSpecial Weather StatementCTP67 min
Sep 11, 5:53 PM EDTSpecial Weather StatementCTP22 min
Sep 12, 12:02 PM EDTMesoscale DiscussionSPC58 min
Sep 12, 12:37 PM EDTSevere Thunderstorm WatchSPC7 hr
Sep 12, 2:35 PM EDTSpecial Weather StatementCTP55 min
Sep 12, 2:41 PM EDTSevere Thunderstorm WarningCTP64 min
Sep 12, 2:41 PM EDTMesoscale DiscussionSPC64 min
Sep 20, 5:47 AM EDTDense Fog AdvisoryCTP3 hr
Oct 7, 8:17 AM EDTSpecial Weather StatementCTP58 min
Oct 7, 8:50 AM EDTSevere Thunderstorm WarningCTP40 min
Oct 7, 8:56 AM EDTTornado WatchSPC8 hr
Oct 10, 10:54 PM EDTAreal Flood AdvisoryCTP3 hr
Oct 10, 11:04 PM EDTFlood WatchCTP21 hr
Oct 11, 1:37 AM EDTAreal Flood AdvisoryCTP14 hr
Oct 11, 3:30 PM EDTAreal Flood AdvisoryCTP4 hr
Oct 17, 6:28 PM EDTSpecial Weather StatementCTP62 min
Oct 17, 6:36 PM EDTMesoscale DiscussionSPC114 min
Oct 17, 7:36 PM EDTSpecial Weather StatementCTP69 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, 4:59 AM EDTSevere Thunderstorm WarningCTP61 min
Nov 1, 5:38 AM EDTSevere Thunderstorm WarningCTP52 min
Nov 1, 5:41 AM EDTMesoscale DiscussionSPC94 min
Nov 17, 10:24 PM ESTMesoscale DiscussionSPC66 min
Nov 17, 11:06 PM ESTSevere Thunderstorm WatchSPC4 hr
Nov 17, 11:41 PM ESTSevere Thunderstorm WarningCTP64 min
Nov 18, 12:20 AM ESTSevere Thunderstorm WarningCTP70 min
Nov 18, 12:36 AM ESTSevere Thunderstorm WarningCTP54 min
Nov 23, 4:49 PM ESTSpecial Weather StatementCTP86 min
Nov 25, 3:20 PM ESTWinter Weather AdvisoryCTP37 hr
Nov 26, 10:25 AM ESTMesoscale DiscussionSPC6 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, 11:19 AM ESTWinter Storm WatchCTP17 hr
Dec 7, 6:13 PM ESTWinter Weather AdvisoryCTP40 hr
Dec 9, 2:21 PM ESTWinter Weather AdvisoryCTP21 hr
Dec 12, 1:49 AM ESTSpecial Weather StatementCTP26 min
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, 4:11 AM ESTSevere Thunderstorm WarningCTP49 min
Dec 22, 5:01 AM ESTSpecial Weather StatementCTP44 min
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.