Alert archive / Pennsylvania / Blair County

Weather alerts in Blair County, Pennsylvania, 2010

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

Blair County and its neighbors

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

Alerts: 163
Warnings: 40
Watches: 28
Advisories: 26
Busiest month: July25 alerts
Busiest day: April 25, 20108 alerts

Over time

By month

Warning verification

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

0 of 1 tornado warnings covering Blair County in 2010 had a tornado report inside them.

Blair County, 2010

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	1	0	100%	0
Severe thunderstorm warnings	17	10	41%	5	80%	33 min
Flash flood warnings	1	1	0%	1	100%	87 min

Each office's whole area, 2010

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS State College, PA: tornado warnings	17	2	88%	6	50%	25 min
NWS State College, PA: severe thunderstorm warnings	213	131	38%	319	85%	27 min
NWS State College, PA: flash flood warnings	22	9	59%	24	71%	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.

Issued	Product	Office	Lasted
Jan 2, 3:16 PM EST	Wind Advisory	CTP	28 hr
Jan 21, 1:48 PM EST	Winter Weather Advisory	CTP	22 hr
Jan 23, 2:56 PM EST	Flood Watch	CTP	48 hr
Jan 24, 9:23 PM EST	Wind Advisory	CTP	15 hr
Jan 25, 2:24 AM EST	Areal Flood Warning	CTP	10 hr
Jan 25, 6:54 AM EST	River Flood Warning	CTP	15 hr
Jan 25, 12:17 PM EST	Areal Flood Warning	CTP	14 hr
Jan 25, 6:01 PM EST	River Flood Warning	CTP	6 hr
Jan 25, 10:40 PM EST	Special Weather Statement	CTP	95 min
Jan 28, 8:44 AM EST	Special Weather Statement	CTP	46 min
Jan 28, 10:20 AM EST	Special Weather Statement	CTP	55 min
Feb 4, 3:20 AM EST	Winter Storm Watch	CTP	12 hr
Feb 4, 3:09 PM EST	Winter Storm Warning	CTP	46 hr
Feb 5, 6:58 PM EST	Mesoscale Discussion	SPC	4 hr
Feb 7, 9:31 PM EST	Winter Storm Watch	CTP	30 hr
Feb 8, 3:56 PM EST	Winter Storm Warning	CTP	54 hr
Feb 15, 4:05 AM EST	Winter Weather Advisory	CTP	31 hr
Feb 15, 1:41 PM EST	Mesoscale Discussion	SPC	5 hr
Feb 22, 7:15 PM EST	Winter Weather Advisory	CTP	14 hr
Feb 25, 10:33 AM EST	High Wind Watch	CTP	4 hr
Feb 25, 2:47 PM EST	Wind Advisory	CTP	24 hr
Mar 10, 4:24 AM EST	Flood Watch	CTP	4 days
Mar 13, 10:09 AM EST	Wind Advisory	CTP	12 hr
Mar 13, 12:15 PM EST	Areal Flood Warning	CTP	12 hr
Mar 13, 4:12 PM EST	River Flood Warning	CTP	29 hr
Mar 13, 4:58 PM EST	River Flood Warning	CTP	24 hr
Mar 13, 11:28 PM EST	Areal Flood Warning	CTP	10 hr
Mar 22, 12:44 PM EDT	Mesoscale Discussion	SPC	2 hr
Mar 22, 6:53 PM EDT	Mesoscale Discussion	SPC	3 hr
Mar 28, 2:19 PM EDT	Flood Watch	CTP	12 hr
Apr 6, 5:20 AM EDT	Mesoscale Discussion	SPC	85 min
Apr 7, 3:43 AM EDT	Red Flag Warning	CTP	15 hr
Apr 8, 4:03 PM EDT	Special Weather Statement	CTP	27 min
Apr 8, 4:48 PM EDT	Severe Thunderstorm Watch	SPC	5 hr
Apr 16, 12:44 PM EDT	Mesoscale Discussion	SPC	2 hr
Apr 16, 1:28 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Apr 16, 2:30 PM EDT	Special Weather Statement	CTP	15 min
Apr 16, 4:28 PM EDT	Severe Thunderstorm Warning	CTP	62 min
Apr 16, 4:34 PM EDT	Mesoscale Discussion	SPC	86 min
Apr 16, 6:14 PM EDT	Mesoscale Discussion	SPC	61 min
Apr 25, 10:56 AM EDT	Mesoscale Discussion	SPC	2 hr
Apr 25, 2:26 PM EDT	Mesoscale Discussion	SPC	94 min
Apr 25, 4:37 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
Apr 25, 4:40 PM EDT	Severe Thunderstorm Warning	CTP	65 min
Apr 25, 4:54 PM EDT	Areal Flood Advisory	CTP	3 hr
Apr 25, 5:04 PM EDT	Severe Thunderstorm Warning	CTP	56 min
Apr 25, 5:12 PM EDT	Tornado Warning	CTP	33 min
Apr 25, 6:16 PM EDT	Mesoscale Discussion	SPC	89 min
Apr 27, 5:41 AM EDT	Freeze Watch	CTP	9 hr
Apr 27, 2:23 PM EDT	Freeze Warning	CTP	19 hr
Apr 28, 5:34 AM EDT	Freeze Watch	CTP	9 hr
Apr 28, 2:23 PM EDT	Freeze Warning	CTP	15 hr
Apr 28, 2:36 PM EDT	Fire Weather Watch	CTP	15 hr
Apr 29, 5:22 AM EDT	Red Flag Warning	CTP	15 hr
May 7, 3:41 PM EDT	Wind Advisory	CTP	31 hr
May 8, 2:27 AM EDT	Special Weather Statement	CTP	48 min
May 8, 2:36 AM EDT	Mesoscale Discussion	SPC	54 min
May 8, 2:40 AM EDT	Severe Thunderstorm Warning	CTP	35 min
May 8, 2:24 PM EDT	Freeze Watch	CTP	14 hr
May 9, 4:11 AM EDT	Freeze Warning	CTP	28 hr
May 14, 11:56 AM EDT	Mesoscale Discussion	SPC	2 hr
May 14, 2:29 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
May 14, 2:59 PM EDT	Special Weather Statement	CTP	46 min
May 14, 3:04 PM EDT	Severe Thunderstorm Warning	CTP	41 min
May 14, 3:19 PM EDT	Severe Thunderstorm Warning	CTP	41 min
May 14, 3:32 PM EDT	Severe Thunderstorm Warning	CTP	58 min
May 14, 7:42 PM EDT	Special Weather Statement	CTP	33 min
May 14, 8:27 PM EDT	Special Weather Statement	CTP	33 min
May 28, 12:51 PM EDT	Special Weather Statement	CTP	24 min
May 28, 1:27 PM EDT	Areal Flood Advisory	CTP	3 hr
May 28, 1:43 PM EDT	Flash Flood Warning	CTP	3 hr
May 31, 1:14 PM EDT	Flash Flood Watch	CTP	14 hr
May 31, 3:43 PM EDT	Severe Thunderstorm Warning	CTP	62 min
May 31, 4:55 PM EDT	Severe Thunderstorm Warning	CTP	65 min
Jun 4, 1:09 PM EDT	Mesoscale Discussion	SPC	66 min
Jun 4, 2:39 PM EDT	Severe Thunderstorm Watch	SPC	8 hr
Jun 4, 4:24 PM EDT	Mesoscale Discussion	SPC	66 min
Jun 4, 7:03 PM EDT	Mesoscale Discussion	SPC	57 min
Jun 4, 8:28 PM EDT	Special Weather Statement	CTP	17 min
Jun 5, 4:30 AM EDT	Flash Flood Watch	CTP	31 hr
Jun 5, 5:42 PM EDT	Special Weather Statement	CTP	18 min
Jun 5, 5:54 PM EDT	Areal Flood Advisory	CTP	94 min
Jun 6, 7:05 AM EDT	Mesoscale Discussion	SPC	115 min
Jun 6, 7:51 AM EDT	Tornado Watch	SPC	7 hr
Jun 6, 11:31 AM EDT	Special Weather Statement	CTP	59 min
Jun 16, 1:39 PM EDT	Mesoscale Discussion	SPC	96 min
Jun 22, 8:42 AM EDT	Special Weather Statement	CTP	48 min
Jun 22, 9:30 AM EDT	Special Weather Statement	CTP	30 min
Jun 22, 11:35 AM EDT	Mesoscale Discussion	SPC	25 min
Jun 22, 3:48 PM EDT	Mesoscale Discussion	SPC	27 min
Jun 23, 6:35 PM EDT	Special Weather Statement	CTP	70 min
Jun 23, 6:38 PM EDT	Mesoscale Discussion	SPC	97 min
Jun 23, 6:45 PM EDT	Severe Thunderstorm Warning	CTP	60 min
Jun 23, 6:46 PM EDT	Severe Thunderstorm Watch	SPC	2 hr
Jun 23, 7:34 PM EDT	Severe Thunderstorm Warning	CTP	56 min
Jun 24, 9:38 AM EDT	Mesoscale Discussion	SPC	97 min
Jun 24, 10:19 AM EDT	Severe Thunderstorm Watch	SPC	8 hr
Jun 24, 12:16 PM EDT	Mesoscale Discussion	SPC	89 min
Jul 9, 2:18 PM EDT	Special Weather Statement	CTP	27 min
Jul 9, 3:53 PM EDT	Areal Flood Advisory	CTP	3 hr
Jul 9, 3:54 PM EDT	Flash Flood Watch	CTP	8 hr
Jul 9, 4:21 PM EDT	Mesoscale Discussion	SPC	114 min
Jul 9, 6:31 PM EDT	Areal Flood Advisory	CTP	3 hr
Jul 13, 10:23 PM EDT	Areal Flood Advisory	CTP	3 hr
Jul 14, 1:21 AM EDT	Areal Flood Advisory	CTP	3 hr
Jul 16, 1:36 PM EDT	Special Weather Statement	CTP	39 min
Jul 17, 10:29 PM EDT	Severe Thunderstorm Warning	CTP	57 min
Jul 18, 1:42 AM EDT	Special Weather Statement	CTP	48 min
Jul 20, 3:33 PM EDT	Special Weather Statement	CTP	12 min
Jul 20, 3:49 PM EDT	Special Weather Statement	CTP	26 min
Jul 20, 5:16 PM EDT	Special Weather Statement	CTP	14 min
Jul 21, 7:00 PM EDT	Mesoscale Discussion	SPC	90 min
Jul 21, 7:35 PM EDT	Severe Thunderstorm Watch	SPC	5 hr
Jul 23, 12:46 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 23, 4:18 PM EDT	Heat Advisory	CTP	29 hr
Jul 23, 6:23 PM EDT	Mesoscale Discussion	SPC	67 min
Jul 23, 9:06 PM EDT	Mesoscale Discussion	SPC	54 min
Jul 25, 10:48 AM EDT	Mesoscale Discussion	SPC	27 min
Jul 25, 11:29 AM EDT	Severe Thunderstorm Watch	SPC	8 hr
Jul 25, 11:50 AM EDT	Severe Thunderstorm Warning	CTP	55 min
Jul 25, 12:37 PM EDT	Areal Flood Advisory	CTP	3 hr
Jul 25, 12:50 PM EDT	Mesoscale Discussion	SPC	55 min
Jul 29, 2:08 AM EDT	Special Weather Statement	CTP	52 min
Aug 4, 5:52 PM EDT	Severe Thunderstorm Watch	SPC	5 hr
Aug 4, 6:07 PM EDT	Severe Thunderstorm Warning	CTP	53 min
Aug 4, 7:48 PM EDT	Mesoscale Discussion	SPC	87 min
Aug 16, 11:14 AM EDT	Mesoscale Discussion	SPC	2 hr
Sep 3, 4:52 PM EDT	Special Weather Statement	CTP	83 min
Sep 22, 1:26 PM EDT	Mesoscale Discussion	SPC	94 min
Sep 22, 2:34 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
Sep 22, 4:43 PM EDT	Special Weather Statement	CTP	62 min
Sep 22, 4:46 PM EDT	Mesoscale Discussion	SPC	59 min
Sep 22, 4:50 PM EDT	Severe Thunderstorm Warning	CTP	70 min
Sep 23, 3:45 AM EDT	Dense Fog Advisory	CTP	2 hr
Sep 28, 5:03 AM EDT	Severe Thunderstorm Warning	CTP	57 min
Sep 28, 5:57 AM EDT	Special Weather Statement	CTP	48 min
Sep 28, 6:44 AM EDT	Special Weather Statement	CTP	46 min
Sep 28, 8:24 AM EDT	Severe Thunderstorm Warning	CTP	66 min
Sep 29, 3:16 AM EDT	Flood Watch	CTP	50 hr
Sep 30, 11:38 AM EDT	Areal Flood Advisory	CTP	16 hr
Oct 11, 3:19 PM EDT	Mesoscale Discussion	SPC	56 min
Oct 11, 5:46 PM EDT	Special Weather Statement	CTP	44 min
Oct 11, 7:09 PM EDT	Special Weather Statement	CTP	66 min
Oct 11, 8:34 PM EDT	Special Weather Statement	CTP	56 min
Oct 12, 2:22 AM EDT	Special Weather Statement	CTP	38 min
Oct 19, 2:06 PM EDT	Frost Advisory	CTP	18 hr
Oct 22, 1:36 PM EDT	Frost Advisory	CTP	19 hr
Nov 16, 2:25 PM EST	Wind Advisory	CTP	28 hr
Nov 16, 9:38 PM EST	Special Weather Statement	CTP	52 min
Nov 24, 3:10 PM EST	Winter Weather Advisory	CTP	31 hr
Nov 29, 1:23 PM EST	Flood Watch	CTP	49 hr
Nov 30, 7:36 PM EST	River Flood Warning	CTP	28 hr
Nov 30, 8:54 PM EST	Areal Flood Advisory	CTP	8 hr
Nov 30, 10:06 PM EST	River Flood Warning	CTP	35 hr
Dec 1, 1:37 AM EST	Areal Flood Warning	CTP	6 hr
Dec 1, 3:14 AM EST	Areal Flood Warning	CTP	6 hr
Dec 1, 8:47 AM EST	Areal Flood Warning	CTP	6 hr
Dec 1, 2:30 PM EST	Areal Flood Warning	CTP	10 hr
Dec 5, 3:49 PM EST	Special Weather Statement	CTP	116 min
Dec 6, 5:32 AM EST	Special Weather Statement	CTP	118 min
Dec 11, 10:40 PM EST	Freezing Rain Advisory	CTP	10 hr
Dec 30, 6:45 AM EST	Freezing Rain Advisory	CTP	6 hr
Dec 30, 9:42 PM EST	Special Weather Statement	CTP	3 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	17
Tornado Warning	1
Severe Thunderstorm Watch	12
Tornado Watch	1
Mesoscale Discussion	34
Special Weather Statement	35
Flooding
Areal Flood Warning	8
Flash Flood Warning	1
River Flood Warning	6
Flash Flood Watch	3
Flood Watch	5
Areal Flood Advisory	10
Winter
Winter Storm Warning	2
Winter Storm Watch	2
Freezing Rain Advisory	2
Winter Weather Advisory	4
Heat
Heat Advisory	1
Cold
Freeze Warning	3
Freeze Watch	3
Frost Advisory	2
Wind and dust
High Wind Watch	1
Wind Advisory	6
Fire
Red Flag Warning	2
Fire Weather Watch	1
Fog and smoke
Dense Fog Advisory	1

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2009 2011

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.