Alert archive / Pennsylvania / Armstrong County

Weather alerts in Armstrong County, Pennsylvania, 2015

143 weather alerts in 2015, 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 2015. Tap one for its archive.

Alerts: 143
Warnings: 45
Watches: 14
Advisories: 37
Busiest month: June43 alerts
Busiest day: June 23, 20159 alerts

Over time

By month

Warning verification

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

1 of 4 tornado warnings covering Armstrong County in 2015 had a tornado report inside them.

Armstrong County, 2015

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	4	1	75%	0
Severe thunderstorm warnings	29	23	21%	15	87%	20 min
Flash flood warnings	6	4	33%	6	67%	72 min

Each office's whole area, 2015

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Pittsburgh, PA: tornado warnings	13	1	92%	2	50%	5 min
NWS Pittsburgh, PA: severe thunderstorm warnings	174	133	24%	505	84%	19 min
NWS Pittsburgh, PA: flash flood warnings	49	38	22%	140	91%	106 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.

Issued	Product	Office	Lasted
Jan 2, 3:25 PM EST	Freezing Rain Advisory	PBZ	18 hr
Jan 3, 9:52 AM EST	Freezing Rain Advisory	PBZ	9 hr
Jan 6, 3:30 PM EST	Wind Chill Advisory	PBZ	46 hr
Jan 6, 3:30 PM EST	Winter Weather Advisory	PBZ	30 hr
Jan 7, 6:06 PM EST	Special Weather Statement	PBZ	114 min
Jan 9, 4:55 AM EST	Wind Chill Advisory	PBZ	32 hr
Jan 9, 7:45 AM EST	Special Weather Statement	PBZ	60 min
Jan 9, 8:45 AM EST	Special Weather Statement	PBZ	60 min
Jan 9, 8:52 AM EST	Special Weather Statement	PBZ	113 min
Jan 11, 3:30 AM EST	Winter Weather Advisory	PBZ	36 hr
Jan 20, 3:30 PM EST	Winter Weather Advisory	PBZ	27 hr
Jan 24, 12:20 AM EST	Special Weather Statement	PBZ	115 min
Jan 24, 3:30 PM EST	Winter Weather Advisory	PBZ	62 hr
Jan 24, 5:51 PM EST	Freezing Rain Advisory	PBZ	7 hr
Jan 27, 8:30 AM EST	Special Weather Statement	PBZ	2 hr
Jan 28, 7:58 PM EST	Freezing Rain Advisory	PBZ	18 hr
Jan 29, 1:14 PM EST	Special Weather Statement	PBZ	46 min
Jan 30, 12:06 PM EST	Winter Storm Watch	PBZ	26 hr
Jan 31, 2:28 PM EST	Winter Storm Warning	PBZ	44 hr
Jan 31, 2:28 PM EST	Winter Weather Advisory	PBZ	53 hr
Feb 9, 12:30 AM EST	Freezing Rain Advisory	PBZ	8 hr
Feb 12, 3:22 AM EST	Wind Chill Advisory	PBZ	32 hr
Feb 13, 3:08 AM EST	Wind Chill Watch	PBZ	24 hr
Feb 13, 2:45 PM EST	Winter Weather Advisory	PBZ	33 hr
Feb 14, 2:59 AM EST	Wind Chill Warning	PBZ	55 hr
Feb 14, 1:02 PM EST	Special Weather Statement	PBZ	58 min
Feb 14, 1:33 PM EST	Mesoscale Discussion	SPC	4 hr
Feb 14, 2:02 PM EST	Special Weather Statement	PBZ	88 min
Feb 15, 11:12 AM EST	Wind Chill Advisory	PBZ	16 hr
Feb 18, 4:08 AM EST	Wind Chill Advisory	PBZ	56 hr
Feb 18, 10:14 AM EST	Special Weather Statement	PBZ	61 min
Feb 18, 2:07 PM EST	Special Weather Statement	PBZ	83 min
Feb 18, 9:42 PM EST	Wind Chill Warning	PBZ	38 hr
Feb 20, 2:45 PM EST	Winter Storm Warning	PBZ	30 hr
Feb 21, 8:15 PM EST	Freezing Rain Advisory	PBZ	8 hr
Feb 22, 4:36 AM EST	Wind Chill Advisory	PBZ	54 hr
Feb 23, 4:32 AM EST	Wind Chill Advisory	PBZ	30 hr
Feb 28, 3:11 PM EST	Winter Weather Advisory	PBZ	30 hr
Mar 2, 2:41 PM EST	Winter Weather Advisory	PBZ	28 hr
Mar 2, 2:53 PM EST	Flood Watch	PBZ	50 hr
Mar 3, 8:11 PM EST	Areal Flood Advisory	PBZ	12 hr
Mar 7, 12:16 PM EST	Special Weather Statement	PBZ	89 min
Mar 10, 6:03 PM EDT	Dense Fog Advisory	PBZ	15 hr
Mar 13, 3:03 AM EDT	Flood Watch	PBZ	34 hr
Mar 14, 8:10 PM EDT	Areal Flood Advisory	PBZ	110 min
Mar 15, 7:07 AM EDT	River Flood Warning	PBZ	70 hr
Apr 9, 4:29 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
Apr 9, 6:17 PM EDT	Severe Thunderstorm Warning	PBZ	28 min
Apr 9, 6:43 PM EDT	Severe Thunderstorm Warning	PBZ	32 min
Apr 21, 4:06 AM EDT	Wind Advisory	PBZ	14 hr
May 6, 3:21 PM EDT	Mesoscale Discussion	SPC	114 min
May 6, 7:12 PM EDT	Special Weather Statement	PBZ	48 min
May 11, 7:26 PM EDT	Mesoscale Discussion	SPC	64 min
May 11, 9:06 PM EDT	Special Weather Statement	PBZ	39 min
May 11, 9:47 PM EDT	Special Weather Statement	PBZ	58 min
May 13, 2:17 PM EDT	Frost Advisory	PBZ	18 hr
May 16, 1:35 PM EDT	Mesoscale Discussion	SPC	2 hr
May 22, 3:17 AM EDT	Frost Advisory	PBZ	28 hr
May 29, 5:07 PM EDT	Severe Thunderstorm Warning	PBZ	19 min
May 29, 5:22 PM EDT	Severe Thunderstorm Warning	PBZ	23 min
May 29, 5:38 PM EDT	Flash Flood Warning	PBZ	3 hr
May 29, 5:41 PM EDT	Severe Thunderstorm Warning	PBZ	34 min
May 30, 2:53 PM EDT	Special Weather Statement	PBZ	52 min
May 30, 7:23 PM EDT	Mesoscale Discussion	SPC	67 min
May 31, 12:51 PM EDT	Mesoscale Discussion	SPC	114 min
May 31, 6:35 PM EDT	Severe Thunderstorm Warning	PBZ	55 min
May 31, 7:30 PM EDT	Special Weather Statement	PBZ	45 min
Jun 5, 5:49 PM EDT	Severe Thunderstorm Warning	PBZ	26 min
Jun 5, 6:20 PM EDT	Severe Thunderstorm Warning	PBZ	25 min
Jun 8, 4:49 PM EDT	Special Weather Statement	PBZ	26 min
Jun 11, 2:47 PM EDT	Mesoscale Discussion	SPC	118 min
Jun 11, 5:46 PM EDT	Severe Thunderstorm Warning	PBZ	29 min
Jun 11, 6:15 PM EDT	Severe Thunderstorm Warning	PBZ	30 min
Jun 11, 6:18 PM EDT	Tornado Warning	PBZ	12 min
Jun 11, 6:30 PM EDT	Tornado Warning	PBZ	15 min
Jun 12, 1:14 PM EDT	Severe Thunderstorm Watch	SPC	8 hr
Jun 12, 4:21 PM EDT	Mesoscale Discussion	SPC	84 min
Jun 12, 5:45 PM EDT	Severe Thunderstorm Warning	PBZ	30 min
Jun 12, 5:58 PM EDT	Severe Thunderstorm Warning	PBZ	47 min
Jun 12, 6:15 PM EDT	Severe Thunderstorm Warning	PBZ	45 min
Jun 12, 6:45 PM EDT	Severe Thunderstorm Warning	PBZ	30 min
Jun 12, 6:53 PM EDT	Mesoscale Discussion	SPC	97 min
Jun 14, 2:06 PM EDT	Mesoscale Discussion	SPC	84 min
Jun 14, 3:15 PM EDT	Flash Flood Watch	PBZ	41 hr
Jun 14, 5:29 PM EDT	Special Weather Statement	PBZ	46 min
Jun 14, 6:07 PM EDT	Special Weather Statement	PBZ	53 min
Jun 14, 7:11 PM EDT	Severe Thunderstorm Warning	PBZ	49 min
Jun 14, 7:24 PM EDT	Flash Flood Warning	PBZ	3 hr
Jun 14, 8:18 PM EDT	Tornado Warning	PBZ	42 min
Jun 14, 8:49 PM EDT	Mesoscale Discussion	SPC	56 min
Jun 15, 1:11 AM EDT	Areal Flood Advisory	PBZ	3 hr
Jun 15, 7:33 PM EDT	Flash Flood Warning	PBZ	12 hr
Jun 18, 8:49 PM EDT	Severe Thunderstorm Warning	PBZ	56 min
Jun 20, 5:12 PM EDT	Severe Thunderstorm Warning	PBZ	48 min
Jun 20, 6:11 PM EDT	Special Weather Statement	PBZ	49 min
Jun 23, 7:53 AM EDT	Severe Thunderstorm Warning	PBZ	22 min
Jun 23, 10:24 AM EDT	Severe Thunderstorm Warning	PBZ	39 min
Jun 23, 12:57 PM EDT	Severe Thunderstorm Warning	PBZ	48 min
Jun 23, 1:17 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 23, 1:32 PM EDT	Severe Thunderstorm Warning	PBZ	43 min
Jun 23, 1:34 PM EDT	Areal Flood Advisory	PBZ	116 min
Jun 23, 1:37 PM EDT	Severe Thunderstorm Warning	PBZ	38 min
Jun 23, 1:59 PM EDT	Flash Flood Warning	PBZ	2 hr
Jun 23, 2:25 PM EDT	Flash Flood Warning	PBZ	3 hr
Jun 26, 3:58 AM EDT	Flood Watch	PBZ	45 hr
Jun 27, 5:01 PM EDT	Tornado Warning	PBZ	14 min
Jun 30, 12:58 PM EDT	Severe Thunderstorm Watch	SPC	8 hr
Jun 30, 2:58 PM EDT	Areal Flood Advisory	PBZ	2 hr
Jun 30, 3:48 PM EDT	Mesoscale Discussion	SPC	117 min
Jun 30, 7:38 PM EDT	Mesoscale Discussion	SPC	67 min
Jul 7, 4:31 PM EDT	Mesoscale Discussion	SPC	2 hr
Jul 7, 7:58 PM EDT	Severe Thunderstorm Warning	PBZ	32 min
Jul 7, 8:04 PM EDT	Severe Thunderstorm Warning	PBZ	26 min
Jul 7, 8:31 PM EDT	Special Weather Statement	PBZ	44 min
Jul 7, 8:58 PM EDT	Severe Thunderstorm Warning	PBZ	47 min
Jul 7, 11:40 PM EDT	Areal Flood Advisory	PBZ	4 hr
Jul 9, 1:27 PM EDT	Tornado Watch	SPC	6 hr
Jul 9, 2:43 PM EDT	Severe Thunderstorm Warning	PBZ	47 min
Jul 9, 3:29 PM EDT	Severe Thunderstorm Warning	PBZ	46 min
Jul 13, 8:49 PM EDT	Flash Flood Warning	PBZ	3 hr
Jul 14, 12:40 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 14, 3:12 PM EDT	Mesoscale Discussion	SPC	93 min
Jul 14, 4:37 PM EDT	Mesoscale Discussion	SPC	83 min
Jul 19, 2:11 PM EDT	Mesoscale Discussion	SPC	2 hr
Jul 19, 3:18 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 19, 8:32 PM EDT	Mesoscale Discussion	SPC	88 min
Jul 26, 3:34 PM EDT	Mesoscale Discussion	SPC	116 min
Aug 3, 9:05 PM EDT	Severe Thunderstorm Warning	PBZ	40 min
Aug 20, 11:49 AM EDT	Mesoscale Discussion	SPC	2 hr
Sep 4, 5:31 PM EDT	Special Weather Statement	PBZ	14 min
Sep 9, 4:52 PM EDT	Severe Thunderstorm Warning	PBZ	38 min
Sep 11, 4:36 AM EDT	Dense Fog Advisory	PBZ	5 hr
Sep 19, 4:10 PM EDT	Mesoscale Discussion	SPC	3 hr
Sep 29, 9:34 AM EDT	Flash Flood Watch	PBZ	18 hr
Sep 29, 5:52 PM EDT	Areal Flood Advisory	PBZ	6 hr
Sep 29, 9:58 PM EDT	Areal Flood Warning	PBZ	6 hr
Nov 11, 2:14 PM EST	Wind Advisory	PBZ	29 hr
Nov 21, 9:18 PM EST	Special Weather Statement	PBZ	72 min
Dec 5, 1:22 AM EST	Dense Fog Advisory	PBZ	11 hr
Dec 5, 6:50 PM EST	Dense Fog Advisory	PBZ	17 hr
Dec 18, 7:13 PM EST	Special Weather Statement	PBZ	3 hr
Dec 18, 8:49 PM EST	Special Weather Statement	PBZ	26 min
Dec 27, 2:52 PM EST	Freezing Rain Advisory	PBZ	37 hr

By product

Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.

Product	Alerts
Severe storms
Severe Thunderstorm Warning	29
Tornado Warning	4
Severe Thunderstorm Watch	6
Tornado Watch	1
Mesoscale Discussion	21
Special Weather Statement	26
Flooding
Areal Flood Warning	1
Flash Flood Warning	6
River Flood Warning	1
Flash Flood Watch	2
Flood Watch	3
Areal Flood Advisory	7
Winter
Winter Storm Warning	2
Winter Storm Watch	1
Freezing Rain Advisory	7
Winter Weather Advisory	8
Cold
Wind Chill Warning	2
Wind Chill Watch	1
Frost Advisory	2
Wind Chill Advisory	7
Wind and dust
Wind Advisory	2
Fog and smoke
Dense Fog Advisory	4

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2014 2016

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.