Alert archive / Pennsylvania / Washington County

Weather alerts in Washington County, Pennsylvania, 2010

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

Washington County and its neighbors

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

Alerts: 151
Warnings: 47
Watches: 37
Advisories: 20
Busiest month: June53 alerts
Busiest day: June 23, 201010 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 2 tornado warnings covering Washington County in 2010 had a tornado report inside them.

Washington County, 2010

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	2	0	100%	0
Severe thunderstorm warnings	33	24	27%	10	70%	29 min
Flash flood warnings	2	2	0%	0

Each office's whole area, 2010

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Pittsburgh, PA: tornado warnings	13	1	92%	4	25%	4 min
NWS Pittsburgh, PA: severe thunderstorm warnings	204	124	39%	290	82%	26 min
NWS Pittsburgh, PA: flash flood warnings	24	15	38%	29	90%	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.

Issued	Product	Office	Lasted
Jan 1, 2:11 PM EST	Winter Weather Advisory	PBZ	5 days
Jan 6, 8:56 AM EST	Winter Weather Advisory	PBZ	3 hr
Jan 6, 3:27 PM EST	Winter Weather Advisory	PBZ	67 hr
Jan 24, 4:34 AM EST	Flood Watch	PBZ	38 hr
Jan 24, 9:54 PM EST	River Flood Watch	PBZ	14 hr
Jan 24, 9:54 PM EST	River Flood Watch	PBZ	14 hr
Jan 25, 11:50 AM EST	River Flood Warning	PBZ	26 hr
Jan 25, 11:50 AM EST	River Flood Warning	PBZ	26 hr
Feb 3, 3:00 PM EST	Winter Storm Watch	PBZ	24 hr
Feb 4, 2:31 PM EST	Winter Storm Warning	PBZ	50 hr
Feb 5, 11:49 AM EST	Mesoscale Discussion	SPC	5 hr
Feb 7, 3:04 PM EST	Winter Storm Watch	PBZ	24 hr
Feb 8, 3:19 PM EST	Winter Storm Warning	PBZ	54 hr
Feb 14, 4:52 PM EST	Winter Weather Advisory	PBZ	4 days
Feb 15, 1:41 PM EST	Mesoscale Discussion	SPC	5 hr
Feb 18, 12:05 PM EST	Winter Weather Advisory	PBZ	4 hr
Feb 25, 2:54 AM EST	Winter Weather Advisory	PBZ	50 hr
Mar 10, 4:19 AM EST	Flood Watch	PBZ	4 days
Mar 11, 12:42 PM EST	River Flood Watch	PBZ	58 hr
Mar 11, 12:42 PM EST	River Flood Watch	PBZ	58 hr
Mar 13, 7:41 AM EST	River Flood Watch	PBZ	7 hr
Mar 22, 12:44 PM EDT	Mesoscale Discussion	SPC	2 hr
Mar 22, 6:53 PM EDT	Mesoscale Discussion	SPC	3 hr
Apr 3, 3:50 AM EDT	Fire Weather Watch	PBZ	12 hr
Apr 3, 10:18 AM EDT	Red Flag Warning	PBZ	10 hr
Apr 7, 10:01 AM EDT	Red Flag Warning	PBZ	9 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, 3:23 PM EDT	Severe Thunderstorm Warning	PBZ	67 min
Apr 16, 4:26 PM EDT	Severe Thunderstorm Warning	PBZ	49 min
Apr 16, 4:34 PM EDT	Mesoscale Discussion	SPC	86 min
Apr 16, 6:14 PM EDT	Mesoscale Discussion	SPC	61 min
Apr 22, 2:23 PM EDT	Frost Advisory	PBZ	18 hr
Apr 25, 10:56 AM EDT	Mesoscale Discussion	SPC	2 hr
Apr 25, 11:54 AM EDT	Severe Thunderstorm Watch	SPC	6 hr
Apr 25, 2:26 PM EDT	Mesoscale Discussion	SPC	94 min
Apr 25, 2:56 PM EDT	Severe Thunderstorm Warning	PBZ	49 min
Apr 25, 3:43 PM EDT	Severe Thunderstorm Warning	PBZ	47 min
Apr 25, 3:45 PM EDT	Severe Thunderstorm Warning	PBZ	45 min
Apr 27, 3:17 AM EDT	Freeze Watch	PBZ	11 hr
Apr 27, 2:31 PM EDT	Freeze Warning	PBZ	18 hr
Apr 28, 3:09 PM EDT	Frost Advisory	PBZ	18 hr
May 7, 2:38 PM EDT	Wind Advisory	PBZ	30 hr
May 7, 7:25 PM EDT	Mesoscale Discussion	SPC	95 min
May 7, 9:31 PM EDT	Severe Thunderstorm Watch	SPC	5 hr
May 8, 2:36 AM EDT	Mesoscale Discussion	SPC	54 min
May 8, 3:04 PM EDT	Freeze Watch	PBZ	12 hr
May 9, 3:22 AM EDT	Freeze Warning	PBZ	29 hr
May 14, 2:29 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
May 14, 3:52 PM EDT	Severe Thunderstorm Warning	PBZ	53 min
May 23, 2:11 AM EDT	Dense Fog Advisory	PBZ	7 hr
May 28, 6:11 PM EDT	Special Weather Statement	PBZ	64 min
May 28, 6:22 PM EDT	Severe Thunderstorm Warning	PBZ	38 min
Jun 2, 1:09 PM EDT	Mesoscale Discussion	SPC	66 min
Jun 2, 1:39 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 2, 3:24 PM EDT	Severe Thunderstorm Warning	PBZ	51 min
Jun 2, 4:14 PM EDT	Mesoscale Discussion	SPC	91 min
Jun 2, 6:29 PM EDT	Severe Thunderstorm Warning	PBZ	46 min
Jun 2, 6:37 PM EDT	Tornado Warning	PBZ	38 min
Jun 2, 7:13 PM EDT	Severe Thunderstorm Warning	PBZ	47 min
Jun 2, 7:19 PM EDT	Mesoscale Discussion	SPC	56 min
Jun 2, 10:03 PM EDT	Severe Thunderstorm Warning	PBZ	57 min
Jun 2, 10:34 PM EDT	Special Weather Statement	PBZ	56 min
Jun 4, 12:15 PM EDT	Mesoscale Discussion	SPC	60 min
Jun 4, 1:14 PM EDT	Severe Thunderstorm Watch	SPC	9 hr
Jun 4, 3:53 PM EDT	Tornado Warning	PBZ	15 min
Jun 4, 4:50 PM EDT	Severe Thunderstorm Warning	PBZ	55 min
Jun 4, 5:53 PM EDT	Severe Thunderstorm Warning	PBZ	67 min
Jun 4, 6:36 PM EDT	Severe Thunderstorm Warning	PBZ	54 min
Jun 4, 6:42 PM EDT	Severe Thunderstorm Warning	PBZ	63 min
Jun 4, 7:30 PM EDT	Mesoscale Discussion	SPC	60 min
Jun 4, 8:07 PM EDT	Severe Thunderstorm Warning	PBZ	58 min
Jun 5, 3:15 AM EDT	Flash Flood Watch	PBZ	32 hr
Jun 5, 8:51 AM EDT	Mesoscale Discussion	SPC	114 min
Jun 5, 1:35 PM EDT	Mesoscale Discussion	SPC	85 min
Jun 5, 2:08 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 5, 3:13 PM EDT	Tornado Watch	SPC	4 hr
Jun 5, 4:20 PM EDT	Severe Thunderstorm Warning	PBZ	55 min
Jun 5, 4:26 PM EDT	Severe Thunderstorm Warning	PBZ	64 min
Jun 5, 5:07 PM EDT	Severe Thunderstorm Warning	PBZ	38 min
Jun 6, 2:03 AM EDT	Tornado Watch	SPC	7 hr
Jun 6, 3:38 AM EDT	Mesoscale Discussion	SPC	2 hr
Jun 6, 7:05 AM EDT	Mesoscale Discussion	SPC	115 min
Jun 6, 7:51 AM EDT	Tornado Watch	SPC	7 hr
Jun 13, 2:00 AM EDT	Special Weather Statement	PBZ	60 min
Jun 13, 3:06 AM EDT	Special Weather Statement	PBZ	54 min
Jun 16, 1:39 PM EDT	Mesoscale Discussion	SPC	96 min
Jun 19, 4:19 PM EDT	Severe Thunderstorm Warning	PBZ	54 min
Jun 19, 6:04 PM EDT	Mesoscale Discussion	SPC	56 min
Jun 22, 4:25 AM EDT	Severe Thunderstorm Watch	SPC	4 hr
Jun 22, 6:49 AM EDT	Special Weather Statement	PBZ	56 min
Jun 23, 1:37 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 23, 3:13 PM EDT	Mesoscale Discussion	SPC	92 min
Jun 23, 3:54 PM EDT	Severe Thunderstorm Warning	PBZ	36 min
Jun 23, 4:27 PM EDT	Severe Thunderstorm Warning	PBZ	33 min
Jun 23, 4:55 PM EDT	Special Weather Statement	PBZ	65 min
Jun 23, 5:06 PM EDT	Severe Thunderstorm Warning	PBZ	54 min
Jun 23, 5:29 PM EDT	Severe Thunderstorm Warning	PBZ	61 min
Jun 23, 5:32 PM EDT	Severe Thunderstorm Warning	PBZ	43 min
Jun 23, 6:08 PM EDT	Severe Thunderstorm Warning	PBZ	52 min
Jun 23, 6:42 PM EDT	Severe Thunderstorm Warning	PBZ	33 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
Jun 28, 7:23 PM EDT	Special Weather Statement	PBZ	22 min
Jun 28, 7:26 PM EDT	Special Weather Statement	PBZ	34 min
Jul 13, 7:27 PM EDT	Flash Flood Warning	PBZ	3 hr
Jul 13, 10:08 PM EDT	Flash Flood Watch	PBZ	5 hr
Jul 13, 10:12 PM EDT	Flash Flood Warning	PBZ	3 hr
Jul 16, 8:44 PM EDT	Special Weather Statement	PBZ	46 min
Jul 21, 2:45 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 23, 3:30 AM EDT	Heat Advisory	PBZ	40 hr
Jul 24, 6:10 PM EDT	Severe Thunderstorm Watch	SPC	4 hr
Aug 4, 2:18 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 4, 3:52 PM EDT	Mesoscale Discussion	SPC	53 min
Aug 4, 3:54 PM EDT	Severe Thunderstorm Warning	PBZ	51 min
Aug 4, 4:17 PM EDT	Severe Thunderstorm Warning	PBZ	58 min
Aug 4, 4:36 PM EDT	Severe Thunderstorm Warning	PBZ	39 min
Aug 4, 10:08 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
Aug 4, 11:52 PM EDT	Mesoscale Discussion	SPC	113 min
Aug 14, 8:44 PM EDT	Areal Flood Advisory	PBZ	3 hr
Sep 16, 4:29 PM EDT	Mesoscale Discussion	SPC	91 min
Sep 22, 2:34 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
Sep 22, 3:44 PM EDT	Severe Thunderstorm Warning	PBZ	31 min
Sep 22, 3:58 PM EDT	Severe Thunderstorm Warning	PBZ	47 min
Sep 22, 4:12 PM EDT	Severe Thunderstorm Warning	PBZ	48 min
Oct 14, 2:40 PM EDT	Special Weather Statement	PBZ	35 min
Oct 14, 3:14 PM EDT	Special Weather Statement	PBZ	46 min
Oct 16, 6:34 PM EDT	Frost Advisory	PBZ	8 hr
Oct 19, 2:17 PM EDT	Frost Advisory	PBZ	19 hr
Oct 21, 9:18 PM EDT	Frost Advisory	PBZ	12 hr
Oct 26, 3:40 AM EDT	Wind Advisory	PBZ	15 hr
Oct 26, 1:09 PM EDT	Mesoscale Discussion	SPC	66 min
Oct 26, 1:36 PM EDT	Tornado Watch	SPC	7 hr
Oct 26, 4:47 PM EDT	Special Weather Statement	PBZ	58 min
Oct 26, 5:45 PM EDT	Mesoscale Discussion	SPC	90 min
Nov 16, 6:33 PM EST	Special Weather Statement	PBZ	57 min
Nov 17, 12:09 AM EST	Special Weather Statement	PBZ	51 min
Nov 17, 1:10 AM EST	Special Weather Statement	PBZ	110 min
Nov 23, 4:16 AM EST	Special Weather Statement	PBZ	59 min
Nov 23, 5:15 AM EST	Special Weather Statement	PBZ	60 min
Nov 29, 1:09 PM EST	Flood Watch	PBZ	39 hr
Nov 29, 1:09 PM EST	Wind Advisory	PBZ	32 hr
Nov 30, 10:00 AM EST	River Flood Watch	PBZ	18 hr
Nov 30, 10:00 AM EST	River Flood Watch	PBZ	18 hr
Dec 1, 3:24 AM EST	River Flood Warning	PBZ	13 hr
Dec 1, 3:24 AM EST	River Flood Warning	PBZ	13 hr
Dec 1, 7:54 AM EST	Areal Flood Advisory	PBZ	6 hr
Dec 10, 2:34 PM EST	Winter Storm Watch	PBZ	38 hr
Dec 12, 3:43 AM EST	Winter Weather Advisory	PBZ	63 hr
Dec 29, 10:30 PM EST	Freezing Rain Advisory	PBZ	13 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	33
Tornado Warning	2
Severe Thunderstorm Watch	15
Tornado Watch	4
Mesoscale Discussion	30
Special Weather Statement	17
Flooding
Flash Flood Warning	2
River Flood Warning	4
Flash Flood Watch	2
Flood Watch	3
River Flood Watch	7
Areal Flood Advisory	2
Winter
Winter Storm Warning	2
Winter Storm Watch	3
Freezing Rain Advisory	1
Winter Weather Advisory	7
Heat
Heat Advisory	1
Cold
Freeze Warning	2
Freeze Watch	2
Frost Advisory	5
Wind and dust
Wind Advisory	3
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.