Alert archive / Pennsylvania / Armstrong County

Weather alerts in Armstrong County, Pennsylvania, 2010

133 weather alerts in 2010, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Armstrong County and its neighbors

Each county as a circle sized by its count in 2010. Tap one for its archive.

Alerts
133
Warnings
25
Watches
27
Advisories
22
Busiest month
June33 alerts
Busiest day
April 16, 20106 alerts

Over time

By month

Warning verification

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

Armstrong County, 2010

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings18950%5100%22 min
Flash flood warnings10100%0

Each office's whole area, 2010

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Pittsburgh, PA: tornado warnings13192%425%4 min
NWS Pittsburgh, PA: severe thunderstorm warnings20412439%29082%26 min
NWS Pittsburgh, PA: flash flood warnings241538%2990%73 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 1, 2:11 PM ESTWinter Weather AdvisoryPBZ5 days
Jan 2, 2:24 PM ESTWind Chill AdvisoryPBZ43 hr
Jan 6, 8:56 AM ESTWinter Weather AdvisoryPBZ3 hr
Jan 6, 3:27 PM ESTWinter Weather AdvisoryPBZ67 hr
Jan 21, 2:31 PM ESTWinter Weather AdvisoryPBZ22 hr
Jan 24, 4:34 AM ESTFlood WatchPBZ38 hr
Feb 3, 3:00 PM ESTWinter Storm WatchPBZ24 hr
Feb 4, 2:31 PM ESTWinter Storm WarningPBZ50 hr
Feb 7, 3:04 PM ESTWinter Storm WatchPBZ24 hr
Feb 8, 3:19 PM ESTWinter Storm WarningPBZ54 hr
Feb 14, 4:52 PM ESTWinter Weather AdvisoryPBZ4 days
Feb 15, 1:41 PM ESTMesoscale DiscussionSPC5 hr
Feb 18, 12:05 PM ESTWinter Weather AdvisoryPBZ4 hr
Feb 25, 2:54 AM ESTWinter Weather AdvisoryPBZ50 hr
Mar 10, 4:19 AM ESTFlood WatchPBZ4 days
Mar 13, 6:26 PM ESTAreal Flood WarningPBZ6 hr
Mar 22, 12:44 PM EDTMesoscale DiscussionSPC2 hr
Mar 22, 6:53 PM EDTMesoscale DiscussionSPC3 hr
Apr 3, 3:50 AM EDTFire Weather WatchPBZ12 hr
Apr 3, 10:18 AM EDTRed Flag WarningPBZ10 hr
Apr 7, 10:01 AM EDTRed Flag WarningPBZ9 hr
Apr 16, 12:44 PM EDTMesoscale DiscussionSPC2 hr
Apr 16, 1:28 PM EDTSevere Thunderstorm WatchSPC7 hr
Apr 16, 3:23 PM EDTSevere Thunderstorm WarningPBZ67 min
Apr 16, 4:03 PM EDTSevere Thunderstorm WarningPBZ57 min
Apr 16, 4:34 PM EDTMesoscale DiscussionSPC86 min
Apr 16, 6:14 PM EDTMesoscale DiscussionSPC61 min
Apr 25, 10:56 AM EDTMesoscale DiscussionSPC2 hr
Apr 25, 11:54 AM EDTSevere Thunderstorm WatchSPC6 hr
Apr 25, 2:26 PM EDTMesoscale DiscussionSPC94 min
Apr 25, 3:45 PM EDTSevere Thunderstorm WarningPBZ45 min
Apr 25, 4:37 PM EDTSevere Thunderstorm WarningPBZ38 min
May 7, 2:38 PM EDTWind AdvisoryPBZ30 hr
May 7, 9:31 PM EDTSevere Thunderstorm WatchSPC5 hr
May 7, 11:42 PM EDTMesoscale DiscussionSPC63 min
May 8, 12:08 AM EDTSevere Thunderstorm WarningPBZ37 min
May 8, 3:04 PM EDTFreeze WatchPBZ12 hr
May 9, 3:22 AM EDTFreeze WarningPBZ29 hr
May 14, 3:48 AM EDTMesoscale DiscussionSPC87 min
May 14, 5:14 AM EDTSevere Thunderstorm WarningPBZ61 min
May 23, 2:11 AM EDTDense Fog AdvisoryPBZ7 hr
May 31, 3:20 PM EDTFlash Flood WatchPBZ12 hr
Jun 2, 1:39 PM EDTSevere Thunderstorm WatchSPC6 hr
Jun 2, 4:14 PM EDTMesoscale DiscussionSPC91 min
Jun 2, 10:31 PM EDTSpecial Weather StatementPBZ59 min
Jun 2, 11:28 PM EDTSpecial Weather StatementPBZ62 min
Jun 4, 1:14 PM EDTSevere Thunderstorm WatchSPC9 hr
Jun 5, 3:15 AM EDTFlash Flood WatchPBZ32 hr
Jun 5, 1:35 PM EDTMesoscale DiscussionSPC85 min
Jun 5, 2:08 PM EDTSevere Thunderstorm WatchSPC6 hr
Jun 5, 2:27 PM EDTSevere Thunderstorm WarningPBZ48 min
Jun 5, 2:59 PM EDTSevere Thunderstorm WarningPBZ46 min
Jun 5, 3:13 PM EDTTornado WatchSPC4 hr
Jun 6, 2:03 AM EDTTornado WatchSPC7 hr
Jun 6, 3:38 AM EDTMesoscale DiscussionSPC2 hr
Jun 6, 7:05 AM EDTMesoscale DiscussionSPC115 min
Jun 6, 7:51 AM EDTTornado WatchSPC7 hr
Jun 6, 9:54 AM EDTSpecial Weather StatementPBZ21 min
Jun 16, 1:39 PM EDTMesoscale DiscussionSPC96 min
Jun 19, 4:16 PM EDTSpecial Weather StatementPBZ44 min
Jun 19, 5:59 PM EDTSpecial Weather StatementPBZ61 min
Jun 19, 6:04 PM EDTMesoscale DiscussionSPC56 min
Jun 22, 7:35 AM EDTSpecial Weather StatementPBZ55 min
Jun 22, 11:35 AM EDTMesoscale DiscussionSPC25 min
Jun 23, 1:37 PM EDTSevere Thunderstorm WatchSPC7 hr
Jun 23, 6:10 PM EDTSevere Thunderstorm WarningPBZ65 min
Jun 23, 6:38 PM EDTMesoscale DiscussionSPC97 min
Jun 23, 6:53 PM EDTAreal Flood AdvisoryPBZ3 hr
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
Jun 27, 3:49 PM EDTMesoscale DiscussionSPC116 min
Jun 27, 6:30 PM EDTSpecial Weather StatementPBZ60 min
Jun 28, 6:36 PM EDTSpecial Weather StatementPBZ24 min
Jun 28, 7:19 PM EDTSpecial Weather StatementPBZ26 min
Jul 9, 2:41 PM EDTFlash Flood WarningPBZ3 hr
Jul 13, 10:08 PM EDTFlash Flood WatchPBZ5 hr
Jul 17, 8:37 PM EDTSevere Thunderstorm WarningPBZ53 min
Jul 17, 9:17 PM EDTSevere Thunderstorm WarningPBZ58 min
Jul 17, 9:32 PM EDTAreal Flood AdvisoryPBZ85 min
Jul 20, 2:20 PM EDTSpecial Weather StatementPBZ55 min
Jul 20, 3:26 PM EDTSpecial Weather StatementPBZ64 min
Jul 21, 2:45 PM EDTSevere Thunderstorm WatchSPC6 hr
Jul 23, 3:30 AM EDTHeat AdvisoryPBZ40 hr
Jul 23, 6:23 PM EDTMesoscale DiscussionSPC67 min
Jul 23, 9:06 PM EDTMesoscale DiscussionSPC54 min
Jul 23, 10:45 PM EDTMesoscale DiscussionSPC90 min
Jul 23, 11:33 PM EDTSpecial Weather StatementPBZ57 min
Jul 24, 6:10 PM EDTSevere Thunderstorm WatchSPC4 hr
Jul 24, 8:11 PM EDTSevere Thunderstorm WarningPBZ64 min
Jul 24, 8:41 PM EDTSevere Thunderstorm WarningPBZ64 min
Jul 24, 8:50 PM EDTSevere Thunderstorm WarningPBZ55 min
Jul 24, 9:36 PM EDTMesoscale DiscussionSPC54 min
Jul 28, 9:11 PM EDTSevere Thunderstorm WarningPBZ49 min
Aug 4, 3:11 PM EDTSpecial Weather StatementPBZ64 min
Aug 4, 4:38 PM EDTSpecial Weather StatementPBZ67 min
Aug 4, 10:08 PM EDTSevere Thunderstorm WatchSPC6 hr
Aug 4, 11:52 PM EDTMesoscale DiscussionSPC113 min
Aug 5, 7:38 PM EDTMesoscale DiscussionSPC2 hr
Sep 16, 6:04 PM EDTMesoscale DiscussionSPC56 min
Sep 22, 1:26 PM EDTMesoscale DiscussionSPC94 min
Sep 22, 2:34 PM EDTSevere Thunderstorm WatchSPC6 hr
Sep 22, 3:22 PM EDTSevere Thunderstorm WarningPBZ53 min
Sep 28, 4:58 AM EDTSpecial Weather StatementPBZ62 min
Sep 28, 5:57 AM EDTSpecial Weather StatementPBZ63 min
Oct 11, 3:19 PM EDTMesoscale DiscussionSPC56 min
Oct 11, 5:13 PM EDTSpecial Weather StatementPBZ47 min
Oct 11, 5:28 PM EDTSpecial Weather StatementPBZ47 min
Oct 11, 5:48 PM EDTSevere Thunderstorm WarningPBZ57 min
Oct 11, 7:06 PM EDTSpecial Weather StatementPBZ54 min
Oct 12, 3:04 AM EDTFrost AdvisoryPBZ30 hr
Oct 16, 6:34 PM EDTFrost AdvisoryPBZ8 hr
Oct 26, 3:40 AM EDTWind AdvisoryPBZ15 hr
Oct 26, 1:09 PM EDTMesoscale DiscussionSPC66 min
Oct 26, 1:36 PM EDTTornado WatchSPC7 hr
Oct 26, 5:25 PM EDTSevere Thunderstorm WarningPBZ50 min
Oct 26, 5:45 PM EDTMesoscale DiscussionSPC90 min
Nov 16, 7:37 PM ESTSpecial Weather StatementPBZ53 min
Nov 17, 1:10 AM ESTSpecial Weather StatementPBZ110 min
Nov 23, 4:16 AM ESTSpecial Weather StatementPBZ59 min
Nov 23, 5:15 AM ESTSpecial Weather StatementPBZ60 min
Nov 29, 1:09 PM ESTFlood WatchPBZ39 hr
Nov 29, 1:09 PM ESTWind AdvisoryPBZ32 hr
Dec 1, 7:54 AM ESTAreal Flood AdvisoryPBZ6 hr
Dec 1, 1:51 PM ESTAreal Flood AdvisoryPBZ6 hr
Dec 5, 3:14 AM ESTWinter Weather AdvisoryPBZ64 hr
Dec 10, 2:34 PM ESTWinter Storm WatchPBZ38 hr
Dec 12, 3:43 AM ESTWinter Weather AdvisoryPBZ63 hr
Dec 13, 7:54 AM ESTSpecial Weather StatementPBZ66 min
Dec 13, 8:00 AM ESTSpecial Weather StatementPBZ3 hr
Dec 13, 11:16 AM ESTSpecial Weather StatementPBZ59 min
Dec 15, 4:19 PM ESTSpecial Weather StatementPBZ116 min
Dec 29, 10:30 PM ESTFreezing Rain AdvisoryPBZ13 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.