Alert archive / Pennsylvania / Blair County

Weather alerts in Blair County, Pennsylvania, 2024

166 weather alerts in 2024, 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 2024. Tap one for its archive.

Alerts: 166
Warnings: 38
Watches: 22
Advisories: 45
Busiest month: August30 alerts
Busiest day: August 29, 202410 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 2024 had a tornado report inside them; 0 of 1 tornado reports fell inside a warning.

Blair County, 2024

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	1	0	100%	1	0%
Severe thunderstorm warnings	17	14	18%	9	100%	15 min
Flash flood warnings	1	1	0%	1	100%	23 min

Each office's whole area, 2024

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS State College, PA: tornado warnings	16	0	100%	4	0%
NWS State College, PA: severe thunderstorm warnings	188	125	34%	422	74%	20 min
NWS State College, PA: flash flood warnings	33	23	30%	65	78%	59 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 4, 2:29 PM EST	Winter Storm Watch	CTP	22 hr
Jan 5, 12:23 PM EST	Winter Storm Warning	CTP	37 hr
Jan 6, 11:47 AM EST	Mesoscale Discussion	SPC	5 hr
Jan 8, 2:14 AM EST	Flood Watch	CTP	49 hr
Jan 8, 4:08 AM EST	Wind Advisory	CTP	62 hr
Jan 8, 11:32 AM EST	Winter Weather Advisory	CTP	27 hr
Jan 10, 3:40 AM EST	High Wind Warning	CTP	14 hr
Jan 12, 4:14 AM EST	Wind Advisory	CTP	41 hr
Jan 14, 2:34 AM EST	Wind Advisory	CTP	14 hr
Jan 14, 7:44 AM EST	Snow Squall Warning	CTP	76 min
Jan 14, 8:25 AM EST	Mesoscale Discussion	SPC	4 hr
Jan 14, 8:26 AM EST	Snow Squall Warning	CTP	64 min
Jan 15, 4:01 AM EST	Winter Weather Advisory	CTP	34 hr
Jan 18, 4:25 AM EST	Winter Weather Advisory	CTP	66 hr
Jan 25, 10:43 AM EST	Dense Fog Advisory	CTP	22 hr
Feb 10, 2:46 PM EST	Winter Storm Watch	CTP	48 hr
Feb 11, 2:49 PM EST	Winter Storm Warning	CTP	43 hr
Feb 15, 3:50 PM EST	Wind Advisory	CTP	18 hr
Feb 16, 3:03 AM EST	Winter Weather Advisory	CTP	28 hr
Feb 16, 1:39 PM EST	Winter Storm Warning	CTP	17 hr
Feb 16, 7:40 PM EST	Mesoscale Discussion	SPC	4 hr
Feb 16, 10:33 PM EST	Mesoscale Discussion	SPC	4 hr
Feb 17, 11:34 AM EST	Mesoscale Discussion	SPC	5 hr
Feb 17, 12:08 PM EST	Snow Squall Warning	CTP	37 min
Feb 17, 12:36 PM EST	Snow Squall Warning	CTP	24 min
Feb 27, 2:47 PM EST	High Wind Watch	CTP	13 hr
Feb 27, 2:47 PM EST	Wind Advisory	CTP	37 hr
Feb 28, 7:40 AM EST	Special Weather Statement	CTP	35 min
Feb 28, 9:50 AM EST	Special Weather Statement	CTP	40 min
Mar 9, 3:20 AM EST	Wind Advisory	CTP	62 hr
Mar 10, 11:49 AM EDT	Snow Squall Warning	CTP	26 min
Mar 10, 12:08 PM EDT	Snow Squall Warning	CTP	52 min
Mar 10, 12:13 PM EDT	Mesoscale Discussion	SPC	4 hr
Mar 10, 2:05 PM EDT	Special Weather Statement	CTP	25 min
Mar 10, 3:47 PM EDT	Special Weather Statement	CTP	28 min
Mar 10, 4:45 PM EDT	Special Weather Statement	CTP	30 min
Mar 10, 6:14 PM EDT	Snow Squall Warning	CTP	46 min
Mar 20, 3:16 AM EDT	Wind Advisory	CTP	17 hr
Apr 1, 2:08 PM EDT	Flood Watch	CTP	60 hr
Apr 2, 10:26 AM EDT	Areal Flood Advisory	CTP	4 hr
Apr 2, 12:07 PM EDT	Areal Flood Advisory	CTP	83 min
Apr 2, 3:34 PM EDT	River Flood Warning	CTP	38 hr
Apr 2, 11:12 PM EDT	River Flood Warning	CTP	38 hr
Apr 3, 12:40 AM EDT	Areal Flood Advisory	CTP	110 min
Apr 3, 2:20 AM EDT	Areal Flood Advisory	CTP	4 hr
Apr 3, 6:23 AM EDT	Areal Flood Advisory	CTP	5 hr
Apr 3, 12:29 PM EDT	Areal Flood Advisory	CTP	91 min
Apr 5, 4:23 PM EDT	Special Weather Statement	CTP	37 min
Apr 12, 10:25 AM EDT	Wind Advisory	CTP	32 hr
Apr 14, 3:29 PM EDT	Mesoscale Discussion	SPC	2 hr
Apr 14, 4:58 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
Apr 14, 6:42 PM EDT	Severe Thunderstorm Warning	CTP	48 min
Apr 14, 6:46 PM EDT	Mesoscale Discussion	SPC	89 min
Apr 14, 7:29 PM EDT	Severe Thunderstorm Warning	CTP	31 min
Apr 14, 9:34 PM EDT	Mesoscale Discussion	SPC	86 min
Apr 17, 9:27 PM EDT	Special Weather Statement	CTP	18 min
Apr 20, 11:26 AM EDT	Frost Advisory	CTP	21 hr
Apr 21, 3:41 AM EDT	Freeze Watch	CTP	8 hr
Apr 21, 11:54 AM EDT	Freeze Warning	CTP	20 hr
Apr 22, 9:45 AM EDT	Frost Advisory	CTP	22 hr
Apr 23, 3:01 PM EDT	Freeze Watch	CTP	23 hr
Apr 24, 1:53 PM EDT	Frost Advisory	CTP	17 hr
Apr 25, 1:32 PM EDT	Frost Advisory	CTP	18 hr
May 8, 3:01 AM EDT	Special Weather Statement	CTP	29 min
May 8, 3:41 AM EDT	Severe Thunderstorm Warning	CTP	49 min
May 16, 6:04 AM EDT	Dense Fog Advisory	CTP	3 hr
May 20, 5:18 AM EDT	Dense Fog Advisory	CTP	4 hr
May 22, 12:28 PM EDT	Mesoscale Discussion	SPC	2 hr
May 22, 1:02 PM EDT	Special Weather Statement	CTP	43 min
May 22, 3:00 PM EDT	Severe Thunderstorm Watch	SPC	5 hr
May 22, 4:39 PM EDT	Mesoscale Discussion	SPC	2 hr
May 23, 3:27 AM EDT	Special Weather Statement	CTP	63 min
May 25, 1:44 PM EDT	Special Weather Statement	CTP	31 min
May 26, 12:09 AM EDT	Dense Fog Advisory	CTP	10 hr
May 26, 8:44 PM EDT	Severe Thunderstorm Watch	SPC	3 hr
May 26, 8:54 PM EDT	Severe Thunderstorm Warning	CTP	51 min
May 26, 9:45 PM EDT	Special Weather Statement	CTP	60 min
May 29, 2:47 PM EDT	Special Weather Statement	CTP	43 min
May 29, 3:17 PM EDT	Special Weather Statement	CTP	13 min
Jun 14, 12:17 PM EDT	Mesoscale Discussion	SPC	118 min
Jun 14, 2:34 PM EDT	Mesoscale Discussion	SPC	116 min
Jun 16, 3:20 PM EDT	Heat Advisory	CTP	7 days
Jun 17, 7:09 PM EDT	Severe Thunderstorm Warning	CTP	51 min
Jun 17, 7:50 PM EDT	Mesoscale Discussion	SPC	55 min
Jun 18, 1:35 PM EDT	Mesoscale Discussion	SPC	85 min
Jun 21, 11:38 AM EDT	Mesoscale Discussion	SPC	2 hr
Jun 23, 1:42 PM EDT	Mesoscale Discussion	SPC	2 hr
Jun 23, 4:33 PM EDT	Severe Thunderstorm Watch	SPC	5 hr
Jun 23, 5:17 PM EDT	Severe Thunderstorm Warning	CTP	43 min
Jun 23, 7:20 PM EDT	Mesoscale Discussion	SPC	115 min
Jun 23, 8:13 PM EDT	Severe Thunderstorm Warning	CTP	77 min
Jun 26, 12:32 PM EDT	Mesoscale Discussion	SPC	2 hr
Jun 26, 8:44 PM EDT	Severe Thunderstorm Warning	CTP	46 min
Jun 26, 9:12 PM EDT	Special Weather Statement	CTP	33 min
Jun 26, 9:12 PM EDT	Mesoscale Discussion	SPC	63 min
Jun 26, 9:13 PM EDT	Severe Thunderstorm Warning	CTP	47 min
Jun 29, 3:42 AM EDT	Flood Watch	CTP	15 hr
Jun 29, 1:11 PM EDT	Tornado Watch	SPC	7 hr
Jun 29, 3:32 PM EDT	Severe Thunderstorm Warning	CTP	43 min
Jun 29, 3:51 PM EDT	Severe Thunderstorm Warning	CTP	39 min
Jun 29, 4:09 PM EDT	Mesoscale Discussion	SPC	96 min
Jun 29, 4:28 PM EDT	Severe Thunderstorm Warning	CTP	47 min
Jul 10, 12:06 PM EDT	Tornado Watch	SPC	11 hr
Jul 10, 3:33 PM EDT	Severe Thunderstorm Warning	CTP	57 min
Jul 13, 2:42 AM EDT	Heat Advisory	CTP	4 days
Jul 30, 12:39 PM EDT	Mesoscale Discussion	SPC	2 hr
Jul 30, 3:25 PM EDT	Special Weather Statement	CTP	35 min
Aug 3, 12:14 PM EDT	Flood Watch	CTP	9 hr
Aug 3, 3:12 PM EDT	Special Weather Statement	CTP	33 min
Aug 6, 10:59 AM EDT	Mesoscale Discussion	SPC	91 min
Aug 6, 11:42 AM EDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 6, 2:10 PM EDT	Mesoscale Discussion	SPC	95 min
Aug 6, 3:58 PM EDT	Special Weather Statement	CTP	32 min
Aug 6, 4:06 PM EDT	Severe Thunderstorm Warning	CTP	39 min
Aug 6, 4:16 PM EDT	Areal Flood Advisory	CTP	74 min
Aug 6, 4:29 PM EDT	Mesoscale Discussion	SPC	61 min
Aug 6, 4:52 PM EDT	Severe Thunderstorm Warning	CTP	38 min
Aug 7, 3:24 PM EDT	Flood Watch	CTP	48 hr
Aug 9, 6:34 AM EDT	Areal Flood Warning	CTP	4 hr
Aug 9, 10:19 AM EDT	River Flood Warning	CTP	5 hr
Aug 17, 7:38 PM EDT	Areal Flood Advisory	CTP	2 hr
Aug 17, 8:04 PM EDT	Flash Flood Warning	CTP	3 hr
Aug 18, 2:15 AM EDT	Areal Flood Advisory	CTP	103 min
Aug 27, 4:05 AM EDT	Heat Advisory	CTP	40 hr
Aug 29, 1:20 PM EDT	Mesoscale Discussion	SPC	115 min
Aug 29, 2:34 PM EDT	Flood Watch	CTP	9 hr
Aug 29, 3:06 PM EDT	Special Weather Statement	CTP	24 min
Aug 29, 3:19 PM EDT	Special Weather Statement	CTP	26 min
Aug 29, 3:54 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 29, 3:56 PM EDT	Special Weather Statement	CTP	34 min
Aug 29, 4:08 PM EDT	Severe Thunderstorm Warning	CTP	52 min
Aug 29, 4:39 PM EDT	Tornado Warning	CTP	20 min
Aug 29, 4:43 PM EDT	Areal Flood Advisory	CTP	2 hr
Aug 29, 5:40 PM EDT	Mesoscale Discussion	SPC	95 min
Aug 31, 12:27 PM EDT	Special Weather Statement	CTP	33 min
Aug 31, 12:40 PM EDT	Severe Thunderstorm Warning	CTP	50 min
Aug 31, 1:27 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
Sep 4, 7:07 AM EDT	Special Weather Statement	CTP	83 min
Sep 5, 4:46 AM EDT	Special Weather Statement	CTP	4 hr
Sep 21, 2:37 PM EDT	Mesoscale Discussion	SPC	2 hr
Sep 22, 2:35 AM EDT	Dense Fog Advisory	CTP	6 hr
Oct 2, 10:27 PM EDT	Dense Fog Advisory	CTP	12 hr
Oct 6, 9:28 PM EDT	Special Weather Statement	CTP	32 min
Oct 10, 3:04 AM EDT	Frost Advisory	CTP	30 hr
Oct 13, 4:58 PM EDT	Mesoscale Discussion	SPC	2 hr
Oct 14, 2:34 PM EDT	Frost Advisory	CTP	18 hr
Oct 15, 12:36 PM EDT	Frost Advisory	CTP	20 hr
Oct 16, 1:44 PM EDT	Frost Advisory	CTP	19 hr
Nov 1, 4:09 AM EDT	Fire Weather Watch	CTP	6 hr
Nov 1, 9:53 AM EDT	Red Flag Warning	CTP	9 hr
Nov 7, 1:57 PM EST	Fire Weather Watch	CTP	18 hr
Nov 7, 1:57 PM EST	Red Flag Warning	CTP	28 hr
Nov 20, 11:28 AM EST	Wind Advisory	CTP	14 hr
Nov 20, 11:39 AM EST	Winter Weather Advisory	CTP	52 hr
Nov 29, 2:41 PM EST	Special Weather Statement	CTP	49 min
Nov 29, 3:24 PM EST	Special Weather Statement	CTP	51 min
Dec 3, 2:37 PM EST	Wind Advisory	CTP	52 hr
Dec 5, 1:28 AM EST	Special Weather Statement	CTP	32 min
Dec 5, 1:52 AM EST	Snow Squall Warning	CTP	23 min
Dec 5, 5:07 AM EST	Special Weather Statement	CTP	53 min
Dec 12, 5:42 AM EST	Wind Advisory	CTP	9 hr
Dec 14, 3:30 AM EST	Winter Weather Advisory	CTP	55 hr
Dec 15, 10:30 AM EST	Mesoscale Discussion	SPC	5 hr
Dec 28, 5:40 PM EST	Dense Fog Advisory	CTP	15 hr
Dec 29, 9:26 PM EST	Special Weather Statement	CTP	34 min
Dec 31, 4:17 PM EST	Special Weather Statement	CTP	28 min

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	7
Tornado Watch	2
Mesoscale Discussion	30
Special Weather Statement	31
Flooding
Areal Flood Warning	1
Flash Flood Warning	1
River Flood Warning	3
Flood Watch	6
Areal Flood Advisory	10
Winter
Snow Squall Warning	8
Winter Storm Warning	3
Winter Storm Watch	2
Winter Weather Advisory	6
Heat
Heat Advisory	3
Cold
Freeze Warning	1
Freeze Watch	2
Frost Advisory	8
Wind and dust
High Wind Warning	1
High Wind Watch	1
Wind Advisory	11
Fire
Red Flag Warning	2
Fire Weather Watch	2
Fog and smoke
Dense Fog Advisory	7

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2023 2025

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.