Alert archive / Pennsylvania / Allegheny County

Weather alerts in Allegheny County, Pennsylvania, 2025

209 weather alerts in 2025, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Allegheny County and its neighbors

Each county as a circle sized by its count in 2025. Tap one for its archive.

Alerts: 209
Warnings: 105
Watches: 25
Advisories: 34
Busiest month: June61 alerts
Busiest day: January 3, 20259 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 3 tornado warnings covering Allegheny County in 2025 had a tornado report inside them.

Allegheny County, 2025

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	3	1	67%	0
Severe thunderstorm warnings	45	33	27%	173	98%	22 min
Flash flood warnings	34	27	21%	59	93%	68 min

Each office's whole area, 2025

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Pittsburgh, PA: tornado warnings	23	6	74%	14	79%	6 min
NWS Pittsburgh, PA: severe thunderstorm warnings	273	175	36%	988	93%	24 min
NWS Pittsburgh, PA: flash flood warnings	125	93	26%	452	92%	70 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 1, 8:50 PM EST	Special Weather Statement	PBZ	40 min
Jan 2, 12:37 PM EST	Winter Weather Advisory	PBZ	45 hr
Jan 3, 1:56 PM EST	Snow Squall Warning	PBZ	49 min
Jan 3, 2:33 PM EST	Snow Squall Warning	PBZ	42 min
Jan 3, 2:37 PM EST	Snow Squall Warning	PBZ	53 min
Jan 3, 3:14 PM EST	Snow Squall Warning	PBZ	46 min
Jan 3, 3:25 PM EST	Snow Squall Warning	PBZ	50 min
Jan 3, 3:59 PM EST	Snow Squall Warning	PBZ	61 min
Jan 3, 4:16 PM EST	Snow Squall Warning	PBZ	59 min
Jan 3, 5:00 PM EST	Snow Squall Warning	PBZ	60 min
Jan 3, 6:03 PM EST	Snow Squall Warning	PBZ	29 min
Jan 5, 2:30 AM EST	Winter Weather Advisory	PBZ	41 hr
Jan 8, 8:34 AM EST	Special Weather Statement	PBZ	26 min
Jan 9, 1:34 PM EST	Winter Weather Advisory	PBZ	53 hr
Jan 15, 1:41 PM EST	Winter Weather Advisory	PBZ	38 hr
Jan 17, 10:48 AM EST	Extreme Cold Watch	PBZ	40 hr
Jan 19, 3:25 AM EST	Cold Weather Advisory	PBZ	3 days
Jan 21, 5:58 PM EST	Special Weather Statement	PBZ	62 min
Feb 4, 2:33 PM EST	Winter Weather Advisory	PBZ	43 hr
Feb 7, 12:33 PM EST	River Flood Advisory	PBZ	7 hr
Feb 7, 1:43 PM EST	Winter Weather Advisory	PBZ	31 hr
Feb 8, 3:57 PM EST	Special Weather Statement	PBZ	48 min
Feb 13, 1:44 AM EST	Flood Watch	PBZ	3 days
Feb 13, 11:44 AM EST	River Flood Watch	PBZ	63 hr
Feb 14, 2:36 PM EST	Winter Weather Advisory	PBZ	26 hr
Feb 15, 6:33 AM EST	Special Weather Statement	PBZ	27 min
Feb 15, 7:06 AM EST	Special Weather Statement	PBZ	39 min
Feb 15, 12:01 PM EST	River Flood Advisory	PBZ	25 hr
Feb 15, 2:56 PM EST	Winter Weather Advisory	PBZ	46 hr
Feb 16, 10:35 AM EST	Areal Flood Warning	PBZ	6 hr
Feb 16, 11:28 AM EST	Areal Flood Warning	PBZ	6 hr
Feb 27, 8:50 PM EST	Severe Thunderstorm Warning	PBZ	25 min
Feb 27, 8:54 PM EST	Special Weather Statement	PBZ	36 min
Feb 27, 9:28 PM EST	Special Weather Statement	PBZ	32 min
Feb 28, 9:52 PM EST	Special Weather Statement	PBZ	38 min
Mar 1, 9:19 AM EST	Special Weather Statement	PBZ	41 min
Mar 1, 10:06 AM EST	Special Weather Statement	PBZ	39 min
Mar 1, 10:46 AM EST	Special Weather Statement	PBZ	44 min
Mar 5, 2:19 PM EST	Mesoscale Discussion	SPC	116 min
Mar 16, 10:04 AM EDT	Mesoscale Discussion	SPC	86 min
Mar 16, 10:31 AM EDT	Tornado Watch	SPC	5 hr
Mar 16, 12:08 PM EDT	Mesoscale Discussion	SPC	97 min
Mar 16, 12:16 PM EDT	Severe Thunderstorm Warning	PBZ	44 min
Mar 16, 12:48 PM EDT	Severe Thunderstorm Warning Considerable damage threat	PBZ	57 min
Mar 16, 12:56 PM EDT	Severe Thunderstorm Warning Considerable damage threat	PBZ	64 min
Mar 30, 10:12 PM EDT	Severe Thunderstorm Watch	SPC	5 hr
Apr 1, 11:59 AM EDT	Flood Watch	PBZ	5 days
Apr 2, 1:56 PM EDT	Severe Thunderstorm Warning	PBZ	34 min
Apr 2, 2:02 PM EDT	Severe Thunderstorm Warning	PBZ	43 min
Apr 2, 2:10 PM EDT	Severe Thunderstorm Warning	PBZ	35 min
Apr 2, 2:33 PM EDT	Severe Thunderstorm Warning	PBZ	42 min
Apr 3, 12:05 AM EDT	Mesoscale Discussion	SPC	115 min
Apr 3, 12:56 AM EDT	Severe Thunderstorm Watch	SPC	6 hr
Apr 3, 3:50 AM EDT	Severe Thunderstorm Warning	PBZ	40 min
Apr 3, 4:37 AM EDT	Severe Thunderstorm Warning	PBZ	38 min
Apr 3, 4:54 AM EDT	Mesoscale Discussion	SPC	96 min
Apr 4, 11:45 AM EDT	River Flood Watch	PBZ	41 hr
Apr 6, 4:52 AM EDT	River Flood Advisory	PBZ	20 hr
Apr 19, 1:16 PM EDT	Mesoscale Discussion	SPC	119 min
Apr 19, 1:34 PM EDT	Severe Thunderstorm Warning	PBZ	41 min
Apr 19, 5:36 PM EDT	Severe Thunderstorm Warning	PBZ	39 min
Apr 19, 6:20 PM EDT	Mesoscale Discussion	SPC	85 min
Apr 19, 6:22 PM EDT	Severe Thunderstorm Warning	PBZ	31 min
Apr 29, 12:01 PM EDT	Mesoscale Discussion	SPC	89 min
Apr 29, 2:41 PM EDT	Mesoscale Discussion	SPC	2 hr
Apr 29, 3:26 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
Apr 29, 4:16 PM EDT	Severe Thunderstorm Warning Destructive damage threat	PBZ	44 min
Apr 29, 4:46 PM EDT	Severe Thunderstorm Warning Destructive damage threat	PBZ	44 min
Apr 29, 5:17 PM EDT	Tornado Warning	PBZ	13 min
Apr 29, 5:21 PM EDT	Severe Thunderstorm Warning Destructive damage threat	PBZ	54 min
Apr 29, 5:24 PM EDT	Severe Thunderstorm Warning Considerable damage threat	PBZ	66 min
May 1, 12:12 PM EDT	Mesoscale Discussion	SPC	2 hr
May 1, 2:43 PM EDT	Mesoscale Discussion	SPC	92 min
May 2, 12:49 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
May 2, 2:58 PM EDT	Mesoscale Discussion	SPC	2 hr
May 2, 5:09 PM EDT	Severe Thunderstorm Warning	PBZ	36 min
May 2, 5:13 PM EDT	Severe Thunderstorm Warning	PBZ	47 min
May 2, 5:42 PM EDT	Mesoscale Discussion	SPC	2 hr
May 4, 7:12 PM EDT	Mesoscale Discussion	SPC	2 hr
May 4, 8:46 PM EDT	Flash Flood Warning	PBZ	3 hr
May 5, 4:22 AM EDT	Dense Fog Advisory	PBZ	5 hr
May 5, 1:02 PM EDT	Mesoscale Discussion	SPC	118 min
May 5, 4:07 PM EDT	Severe Thunderstorm Watch	SPC	5 hr
May 5, 5:28 PM EDT	Severe Thunderstorm Warning	PBZ	32 min
May 5, 8:11 PM EDT	Mesoscale Discussion	SPC	2 hr
May 9, 2:19 AM EDT	Frost Advisory	PBZ	30 hr
May 14, 5:30 PM EDT	Flash Flood Warning	PBZ	68 min
May 16, 2:32 PM EDT	Severe Thunderstorm Watch	SPC	5 hr
May 17, 12:42 AM EDT	Severe Thunderstorm Warning	PBZ	48 min
May 20, 1:05 PM EDT	Flood Watch	PBZ	31 hr
May 21, 1:46 PM EDT	Mesoscale Discussion	SPC	2 hr
May 21, 2:43 PM EDT	Tornado Watch	SPC	4 hr
May 21, 5:00 PM EDT	Tornado Warning	PBZ	30 min
May 21, 5:28 PM EDT	Flash Flood Warning	PBZ	2 hr
May 31, 6:43 AM EDT	River Flood Advisory	PBZ	19 hr
Jun 5, 1:50 PM EDT	Mesoscale Discussion	SPC	115 min
Jun 6, 2:19 PM EDT	Severe Thunderstorm Warning	PBZ	26 min
Jun 6, 3:00 PM EDT	Flash Flood Warning	PBZ	5 hr
Jun 6, 3:58 PM EDT	Flash Flood Warning	PBZ	4 hr
Jun 6, 4:50 PM EDT	Flash Flood Warning	PBZ	3 hr
Jun 6, 5:29 PM EDT	Flash Flood Warning	PBZ	3 hr
Jun 6, 7:49 PM EDT	Areal Flood Warning	PBZ	5 hr
Jun 6, 7:53 PM EDT	Areal Flood Warning	PBZ	4 hr
Jun 6, 9:02 PM EDT	Flash Flood Warning	PBZ	118 min
Jun 7, 5:31 PM EDT	Flood Watch	PBZ	26 hr
Jun 8, 3:55 PM EDT	Tornado Warning	PBZ	21 min
Jun 8, 4:17 PM EDT	Flash Flood Warning	PBZ	62 min
Jun 9, 2:06 PM EDT	Mesoscale Discussion	SPC	84 min
Jun 9, 2:46 PM EDT	Severe Thunderstorm Watch	SPC	9 hr
Jun 9, 4:51 PM EDT	Mesoscale Discussion	SPC	54 min
Jun 9, 5:28 PM EDT	Severe Thunderstorm Warning	PBZ	28 min
Jun 14, 12:20 AM EDT	Flash Flood Warning	PBZ	2 hr
Jun 14, 3:06 AM EDT	Flood Watch	PBZ	20 hr
Jun 14, 8:46 PM EDT	Flash Flood Warning	PBZ	4 hr
Jun 15, 3:21 AM EDT	Flood Watch	PBZ	39 hr
Jun 15, 3:31 PM EDT	Flash Flood Warning	PBZ	4 hr
Jun 15, 4:18 PM EDT	Flash Flood Warning	PBZ	3 hr
Jun 15, 5:06 PM EDT	Flash Flood Warning	PBZ	3 hr
Jun 17, 3:17 AM EDT	Flood Watch	PBZ	27 hr
Jun 17, 12:34 PM EDT	Flash Flood Warning	PBZ	3 hr
Jun 17, 12:50 PM EDT	Flash Flood Warning	PBZ	5 hr
Jun 17, 1:06 PM EDT	Flash Flood Warning	PBZ	4 hr
Jun 18, 5:20 PM EDT	Severe Thunderstorm Warning	PBZ	40 min
Jun 18, 5:43 PM EDT	Severe Thunderstorm Warning	PBZ	47 min
Jun 18, 6:03 PM EDT	Mesoscale Discussion	SPC	87 min
Jun 18, 8:14 PM EDT	Severe Thunderstorm Watch	SPC	5 hr
Jun 18, 9:18 PM EDT	Mesoscale Discussion	SPC	87 min
Jun 18, 10:54 PM EDT	Severe Thunderstorm Warning	PBZ	66 min
Jun 18, 11:57 PM EDT	Severe Thunderstorm Warning	PBZ	63 min
Jun 19, 2:17 PM EDT	Mesoscale Discussion	SPC	118 min
Jun 19, 4:59 PM EDT	Severe Thunderstorm Warning	PBZ	46 min
Jun 20, 2:02 AM EDT	Extreme Heat Watch	PBZ	23 hr
Jun 21, 1:28 AM EDT	Heat Advisory	PBZ	7 days
Jun 21, 1:28 AM EDT	Extreme Heat Warning	PBZ	5 days
Jun 25, 2:22 PM EDT	Mesoscale Discussion	SPC	113 min
Jun 25, 5:38 PM EDT	Flash Flood Warning	PBZ	109 min
Jun 25, 6:07 PM EDT	Severe Thunderstorm Warning	PBZ	38 min
Jun 26, 2:07 PM EDT	Mesoscale Discussion	SPC	113 min
Jun 26, 5:22 PM EDT	Severe Thunderstorm Warning	PBZ	38 min
Jun 26, 5:32 PM EDT	Flash Flood Warning	PBZ	4 hr
Jun 26, 5:37 PM EDT	Severe Thunderstorm Warning	PBZ	38 min
Jun 26, 5:50 PM EDT	Flash Flood Warning	PBZ	3 hr
Jun 26, 5:56 PM EDT	Severe Thunderstorm Warning	PBZ	49 min
Jun 26, 6:05 PM EDT	Severe Thunderstorm Warning	PBZ	40 min
Jun 27, 10:11 AM EDT	Flood Watch	PBZ	14 hr
Jun 27, 4:58 PM EDT	Flash Flood Warning	PBZ	3 hr
Jun 27, 5:11 PM EDT	Severe Thunderstorm Warning	PBZ	34 min
Jun 27, 5:24 PM EDT	Flash Flood Warning	PBZ	3 hr
Jun 27, 5:34 PM EDT	Severe Thunderstorm Warning	PBZ	27 min
Jun 27, 5:54 PM EDT	Severe Thunderstorm Warning	PBZ	51 min
Jun 27, 5:55 PM EDT	Flash Flood Warning	PBZ	3 hr
Jun 28, 10:51 AM EDT	Mesoscale Discussion	SPC	114 min
Jun 28, 11:48 AM EDT	Severe Thunderstorm Watch	SPC	8 hr
Jun 28, 5:25 PM EDT	Flash Flood Warning	PBZ	3 hr
Jun 28, 5:28 PM EDT	Severe Thunderstorm Warning	PBZ	47 min
Jun 30, 12:24 PM EDT	Flood Watch	PBZ	10 hr
Jul 1, 10:51 AM EDT	Flash Flood Warning	PBZ	3 hr
Jul 1, 11:21 AM EDT	Flash Flood Warning	PBZ	3 hr
Jul 7, 2:04 PM EDT	Mesoscale Discussion	SPC	2 hr
Jul 7, 7:06 PM EDT	Flash Flood Warning	PBZ	53 min
Jul 10, 12:51 PM EDT	Mesoscale Discussion	SPC	114 min
Jul 13, 3:39 PM EDT	Severe Thunderstorm Warning	PBZ	27 min
Jul 13, 3:46 PM EDT	Flash Flood Warning	PBZ	2 hr
Jul 14, 6:57 AM EDT	Flash Flood Warning	PBZ	2 hr
Jul 16, 1:48 PM EDT	Flash Flood Warning	PBZ	3 hr
Jul 16, 3:49 PM EDT	Flash Flood Warning	PBZ	103 min
Jul 16, 6:07 PM EDT	Severe Thunderstorm Warning	PBZ	38 min
Jul 16, 6:20 PM EDT	Flash Flood Warning	PBZ	4 hr
Jul 16, 6:37 PM EDT	Severe Thunderstorm Warning	PBZ	38 min
Jul 16, 7:00 PM EDT	Severe Thunderstorm Warning	PBZ	45 min
Jul 16, 7:44 PM EDT	Flash Flood Warning	PBZ	111 min
Jul 16, 7:51 PM EDT	Severe Thunderstorm Warning	PBZ	39 min
Jul 16, 8:41 PM EDT	Severe Thunderstorm Warning	PBZ	22 min
Jul 16, 8:42 PM EDT	Flash Flood Warning	PBZ	2 hr
Jul 26, 6:40 PM EDT	Severe Thunderstorm Warning	PBZ	41 min
Jul 28, 1:13 PM EDT	Heat Advisory	PBZ	31 hr
Aug 17, 12:39 PM EDT	Mesoscale Discussion	SPC	66 min
Sep 5, 1:10 AM EDT	Dense Fog Advisory	PBZ	8 hr
Sep 23, 11:08 PM EDT	Dense Fog Advisory	PBZ	10 hr
Sep 26, 1:44 AM EDT	Dense Fog Advisory	PBZ	8 hr
Sep 28, 4:01 AM EDT	Dense Fog Advisory	PBZ	20 min
Sep 28, 4:21 AM EDT	Dense Fog Advisory	PBZ	5 hr
Oct 9, 12:18 PM EDT	Frost Advisory	PBZ	21 hr
Oct 15, 1:14 AM EDT	Frost Advisory	PBZ	32 hr
Oct 15, 12:25 PM EDT	Freeze Watch	PBZ	24 hr
Oct 16, 12:40 PM EDT	Frost Advisory	PBZ	20 hr
Oct 21, 10:18 PM EDT	Severe Thunderstorm Warning	PBZ	27 min
Oct 24, 12:53 PM EDT	Freeze Warning	PBZ	20 hr
Oct 25, 12:58 PM EDT	Frost Advisory	PBZ	20 hr
Nov 8, 5:47 AM EST	Dense Fog Advisory	PBZ	4 hr
Nov 15, 6:14 PM EST	Mesoscale Discussion	SPC	3 hr
Nov 19, 11:55 PM EST	Dense Fog Advisory	PBZ	10 hr
Nov 20, 7:47 PM EST	Dense Fog Advisory	PBZ	13 hr
Dec 1, 1:09 AM EST	Winter Weather Advisory	PBZ	45 hr
Dec 2, 4:54 AM EST	Mesoscale Discussion	SPC	4 hr
Dec 12, 11:41 AM EST	Winter Storm Warning	PBZ	49 hr
Dec 12, 11:41 AM EST	Winter Weather Advisory	PBZ	67 hr
Dec 19, 2:27 PM EST	Snow Squall Warning	PBZ	48 min
Dec 19, 2:45 PM EST	Snow Squall Warning	PBZ	30 min
Dec 19, 3:16 PM EST	Snow Squall Warning	PBZ	44 min
Dec 19, 3:59 PM EST	Snow Squall Warning	PBZ	61 min
Dec 25, 12:42 PM EST	Winter Weather Advisory	PBZ	33 hr
Dec 28, 1:13 AM EST	Wind Advisory	PBZ	46 hr
Dec 29, 11:34 PM EST	Snow Squall Warning	PBZ	56 min
Dec 30, 1:24 AM EST	Snow Squall Warning	PBZ	53 min
Dec 30, 9:01 AM EST	Snow Squall Warning	PBZ	44 min
Dec 30, 12:36 PM EST	Special Weather Statement	PBZ	84 min
Dec 30, 1:04 PM EST	Winter Weather Advisory	PBZ	45 hr
Dec 31, 6:42 PM EST	Mesoscale Discussion	SPC	5 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	45
Tornado Warning	3
Severe Thunderstorm Watch	9
Tornado Watch	2
Mesoscale Discussion	32
Special Weather Statement	13
Flooding
Areal Flood Warning	4
Flash Flood Warning	34
Flood Watch	9
River Flood Watch	2
River Flood Advisory	4
Winter
Snow Squall Warning	16
Winter Storm Warning	1
Winter Weather Advisory	12
Heat
Extreme Heat Warning	1
Extreme Heat Watch	1
Heat Advisory	2
Cold
Freeze Warning	1
Extreme Cold Watch	1
Freeze Watch	1
Cold Weather Advisory	1
Frost Advisory	5
Wind and dust
Wind Advisory	1
Fog and smoke
Dense Fog Advisory	9

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2024 2026

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.