Alert archive / Pennsylvania / Tioga County

Weather alerts in Tioga County, Pennsylvania, 2011

218 weather alerts in 2011, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Tioga County and its neighbors

Each county as a circle sized by its count in 2011. Tap one for its archive.

Alerts: 218
Warnings: 47
Watches: 33
Advisories: 45
Busiest month: April47 alerts
Busiest day: April 26, 201118 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 Tioga County in 2011 had a tornado report inside them; 0 of 1 tornado reports fell inside a warning.

Tioga County, 2011

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	2	0	100%	1	0%
Severe thunderstorm warnings	22	7	68%	8	63%	19 min
Flash flood warnings	6	2	67%	3	0%

Each office's whole area, 2011

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS State College, PA: tornado warnings	40	7	83%	23	35%	22 min
NWS State College, PA: severe thunderstorm warnings	243	127	48%	332	83%	28 min
NWS State College, PA: flash flood warnings	79	46	42%	114	76%	101 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 6, 2:36 PM EST	Winter Weather Advisory	CTP	22 hr
Jan 10, 3:14 PM EST	Winter Weather Advisory	CTP	3 days
Jan 18, 8:34 PM EST	Winter Weather Advisory	CTP	11 hr
Jan 20, 4:13 AM EST	Winter Weather Advisory	CTP	40 hr
Jan 21, 9:27 AM EST	Special Weather Statement	CTP	48 min
Jan 21, 10:08 AM EST	Special Weather Statement	CTP	37 min
Jan 23, 2:40 PM EST	Wind Chill Advisory	CTP	20 hr
Jan 29, 10:45 AM EST	Winter Weather Advisory	CTP	5 hr
Jan 30, 12:16 AM EST	Special Weather Statement	CTP	119 min
Jan 30, 7:18 PM EST	Winter Storm Watch	CTP	20 hr
Jan 31, 3:07 PM EST	Winter Storm Warning	CTP	40 hr
Feb 1, 2:42 AM EST	Mesoscale Discussion	SPC	4 hr
Feb 4, 2:47 PM EST	Winter Weather Advisory	CTP	32 hr
Feb 5, 5:39 PM EST	Special Weather Statement	CTP	36 min
Feb 7, 2:52 PM EST	Winter Weather Advisory	CTP	19 hr
Feb 8, 2:11 PM EST	Wind Chill Advisory	CTP	19 hr
Feb 13, 3:14 PM EST	Wind Advisory	CTP	30 hr
Feb 18, 11:00 AM EST	High Wind Watch	CTP	10 hr
Feb 18, 9:18 PM EST	High Wind Warning	CTP	24 hr
Feb 20, 4:29 AM EST	Winter Weather Advisory	CTP	30 hr
Feb 20, 2:03 PM EST	Winter Storm Warning	CTP	20 hr
Feb 20, 7:46 PM EST	Mesoscale Discussion	SPC	4 hr
Feb 20, 11:50 PM EST	Mesoscale Discussion	SPC	5 hr
Feb 23, 3:21 PM EST	Winter Storm Watch	CTP	31 hr
Feb 24, 9:58 PM EST	Winter Storm Warning	CTP	18 hr
Feb 24, 9:58 PM EST	Winter Weather Advisory	CTP	18 hr
Feb 25, 2:46 AM EST	Mesoscale Discussion	SPC	4 hr
Feb 27, 1:59 PM EST	Flood Watch	CTP	22 hr
Feb 28, 7:40 AM EST	Areal Flood Advisory	CTP	6 hr
Mar 4, 3:33 AM EST	Flood Watch	CTP	3 days
Mar 5, 11:19 AM EST	Winter Storm Watch	CTP	18 hr
Mar 6, 4:51 AM EST	Winter Storm Warning	CTP	26 hr
Mar 6, 1:56 PM EST	Areal Flood Warning	CTP	6 hr
Mar 8, 4:25 AM EST	Flood Watch	CTP	66 hr
Mar 10, 10:42 AM EST	Areal Flood Advisory	CTP	4 hr
Mar 10, 2:49 PM EST	Areal Flood Advisory	CTP	4 hr
Mar 10, 5:11 PM EST	Areal Flood Warning	CTP	12 hr
Mar 11, 4:52 AM EST	Areal Flood Warning	CTP	8 hr
Mar 22, 3:51 AM EDT	Winter Storm Watch	CTP	12 hr
Mar 22, 3:49 PM EDT	Winter Storm Warning	CTP	22 hr
Mar 23, 3:32 AM EDT	Mesoscale Discussion	SPC	4 hr
Mar 23, 5:29 PM EDT	Winter Weather Advisory	CTP	4 hr
Apr 4, 10:00 PM EDT	Flood Watch	CTP	10 hr
Apr 5, 4:05 AM EDT	Areal Flood Advisory	CTP	3 hr
Apr 5, 7:21 AM EDT	Areal Flood Advisory	CTP	4 hr
Apr 15, 1:56 PM EDT	Wind Advisory	CTP	32 hr
Apr 16, 4:39 PM EDT	Areal Flood Warning	CTP	20 hr
Apr 16, 9:40 PM EDT	Wind Advisory	CTP	22 hr
Apr 20, 3:45 PM EDT	Mesoscale Discussion	SPC	30 min
Apr 25, 1:52 PM EDT	Mesoscale Discussion	SPC	83 min
Apr 25, 2:47 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Apr 25, 4:51 PM EDT	Special Weather Statement	CTP	24 min
Apr 25, 5:17 PM EDT	Special Weather Statement	CTP	13 min
Apr 25, 5:39 PM EDT	Special Weather Statement	CTP	21 min
Apr 25, 6:00 PM EDT	Mesoscale Discussion	SPC	60 min
Apr 25, 6:54 PM EDT	Special Weather Statement	CTP	51 min
Apr 25, 8:06 PM EDT	Special Weather Statement	CTP	24 min
Apr 25, 8:39 PM EDT	Special Weather Statement	CTP	21 min
Apr 25, 8:48 PM EDT	Special Weather Statement	CTP	42 min
Apr 25, 9:20 PM EDT	Special Weather Statement	CTP	25 min
Apr 26, 1:18 PM EDT	Mesoscale Discussion	SPC	57 min
Apr 26, 1:49 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Apr 26, 2:32 PM EDT	Special Weather Statement	CTP	58 min
Apr 26, 2:54 PM EDT	Severe Thunderstorm Warning	CTP	66 min
Apr 26, 4:01 PM EDT	Special Weather Statement	CTP	29 min
Apr 26, 4:12 PM EDT	Mesoscale Discussion	SPC	63 min
Apr 26, 4:40 PM EDT	Severe Thunderstorm Warning	CTP	35 min
Apr 26, 5:03 PM EDT	Severe Thunderstorm Warning	CTP	42 min
Apr 26, 6:32 PM EDT	Special Weather Statement	CTP	13 min
Apr 26, 6:39 PM EDT	Special Weather Statement	CTP	66 min
Apr 26, 6:44 PM EDT	Areal Flood Advisory	CTP	3 hr
Apr 26, 6:51 PM EDT	Mesoscale Discussion	SPC	54 min
Apr 26, 7:12 PM EDT	Flash Flood Warning	CTP	3 hr
Apr 26, 7:20 PM EDT	Severe Thunderstorm Warning	CTP	55 min
Apr 27, 11:16 AM EDT	Flash Flood Watch	CTP	23 hr
Apr 27, 1:24 PM EDT	Mesoscale Discussion	SPC	96 min
Apr 27, 3:10 PM EDT	Tornado Watch	SPC	7 hr
Apr 27, 5:43 PM EDT	Severe Thunderstorm Warning	CTP	62 min
Apr 27, 6:30 PM EDT	Tornado Warning	CTP	30 min
Apr 27, 6:45 PM EDT	Severe Thunderstorm Warning	CTP	60 min
Apr 27, 6:50 PM EDT	Mesoscale Discussion	SPC	55 min
Apr 27, 7:07 PM EDT	Areal Flood Advisory	CTP	3 hr
Apr 27, 7:48 PM EDT	Severe Thunderstorm Warning	CTP	57 min
Apr 27, 8:46 PM EDT	Severe Thunderstorm Warning	CTP	44 min
Apr 27, 11:50 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Apr 28, 12:33 AM EDT	Severe Thunderstorm Warning	CTP	57 min
Apr 28, 1:42 AM EDT	Flash Flood Warning	CTP	4 hr
Apr 28, 2:20 AM EDT	Mesoscale Discussion	SPC	55 min
Apr 28, 3:03 AM EDT	Special Weather Statement	CTP	42 min
May 3, 3:54 AM EDT	Flash Flood Watch	CTP	22 hr
May 3, 3:47 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
May 3, 5:08 PM EDT	Flash Flood Warning	CTP	3 hr
May 3, 6:51 PM EDT	Mesoscale Discussion	SPC	84 min
May 7, 12:54 PM EDT	Special Weather Statement	CTP	36 min
May 9, 2:30 PM EDT	Frost Advisory	CTP	18 hr
May 13, 7:26 PM EDT	Special Weather Statement	CTP	2 hr
May 19, 2:17 PM EDT	Mesoscale Discussion	SPC	58 min
May 19, 6:47 PM EDT	Areal Flood Warning	CTP	3 hr
May 20, 7:09 AM EDT	Areal Flood Advisory	CTP	3 hr
May 23, 4:40 PM EDT	Mesoscale Discussion	SPC	95 min
May 24, 12:53 AM EDT	Special Weather Statement	CTP	37 min
May 24, 1:05 AM EDT	Special Weather Statement	CTP	55 min
May 25, 11:24 PM EDT	Severe Thunderstorm Warning	CTP	66 min
May 25, 11:55 PM EDT	Special Weather Statement	CTP	80 min
May 26, 12:13 AM EDT	Severe Thunderstorm Warning	CTP	62 min
May 26, 11:55 AM EDT	Mesoscale Discussion	SPC	95 min
May 26, 2:53 PM EDT	Tornado Watch	SPC	7 hr
May 26, 3:43 PM EDT	Special Weather Statement	CTP	62 min
May 26, 5:49 PM EDT	Mesoscale Discussion	SPC	56 min
May 26, 7:23 PM EDT	Severe Thunderstorm Warning	CTP	67 min
May 27, 12:57 PM EDT	Severe Thunderstorm Watch	SPC	9 hr
May 27, 5:01 PM EDT	Severe Thunderstorm Warning	CTP	44 min
May 27, 5:50 PM EDT	Special Weather Statement	CTP	55 min
May 27, 5:56 PM EDT	Severe Thunderstorm Warning	CTP	64 min
May 27, 6:01 PM EDT	Tornado Warning	CTP	59 min
May 27, 6:14 PM EDT	Mesoscale Discussion	SPC	2 hr
May 27, 6:16 PM EDT	Severe Thunderstorm Warning	CTP	59 min
May 27, 7:00 PM EDT	Severe Thunderstorm Warning	CTP	45 min
May 27, 7:42 PM EDT	Areal Flood Advisory	CTP	3 hr
May 29, 6:17 PM EDT	Severe Thunderstorm Watch	SPC	5 hr
May 29, 9:47 PM EDT	Mesoscale Discussion	SPC	58 min
May 29, 11:02 PM EDT	Special Weather Statement	CTP	28 min
May 29, 11:36 PM EDT	Special Weather Statement	CTP	9 min
May 30, 1:52 AM EDT	Special Weather Statement	CTP	53 min
May 30, 2:43 AM EDT	Severe Thunderstorm Warning	CTP	62 min
Jun 1, 9:38 AM EDT	Mesoscale Discussion	SPC	37 min
Jun 1, 10:02 AM EDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 2, 3:20 AM EDT	Frost Advisory	CTP	27 hr
Jun 9, 3:29 AM EDT	Mesoscale Discussion	SPC	2 hr
Jun 9, 3:56 AM EDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 9, 8:13 AM EDT	Mesoscale Discussion	SPC	2 hr
Jun 9, 10:36 AM EDT	Mesoscale Discussion	SPC	84 min
Jun 9, 11:33 AM EDT	Mesoscale Discussion	SPC	57 min
Jun 9, 12:53 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 9, 1:47 PM EDT	Severe Thunderstorm Warning	CTP	88 min
Jun 9, 3:15 PM EDT	Special Weather Statement	CTP	30 min
Jun 9, 3:47 PM EDT	Severe Thunderstorm Warning	CTP	58 min
Jun 11, 7:07 PM EDT	Special Weather Statement	CTP	23 min
Jun 16, 6:01 PM EDT	Mesoscale Discussion	SPC	89 min
Jun 22, 3:19 AM EDT	Special Weather Statement	CTP	26 min
Jun 22, 3:59 AM EDT	Special Weather Statement	CTP	31 min
Jun 23, 3:27 PM EDT	Mesoscale Discussion	SPC	2 hr
Jun 24, 11:42 AM EDT	Mesoscale Discussion	SPC	3 hr
Jun 28, 1:19 PM EDT	Mesoscale Discussion	SPC	86 min
Jun 28, 4:58 PM EDT	Special Weather Statement	CTP	62 min
Jun 28, 6:23 PM EDT	Special Weather Statement	CTP	67 min
Jul 3, 1:13 AM EDT	Areal Flood Advisory	CTP	3 hr
Jul 6, 1:04 PM EDT	Mesoscale Discussion	SPC	56 min
Jul 6, 1:29 PM EDT	Severe Thunderstorm Watch	SPC	8 hr
Jul 8, 11:44 AM EDT	Mesoscale Discussion	SPC	61 min
Jul 8, 4:08 PM EDT	Areal Flood Advisory	CTP	3 hr
Jul 18, 5:51 PM EDT	Special Weather Statement	CTP	54 min
Jul 19, 3:35 PM EDT	Excessive Heat Watch	CTP	22 hr
Jul 20, 1:43 PM EDT	Heat Advisory	CTP	30 hr
Jul 25, 11:12 AM EDT	Mesoscale Discussion	SPC	63 min
Jul 25, 11:37 AM EDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 25, 1:52 PM EDT	Severe Thunderstorm Warning	CTP	53 min
Jul 25, 3:16 PM EDT	Mesoscale Discussion	SPC	59 min
Jul 25, 7:10 PM EDT	Special Weather Statement	CTP	50 min
Jul 25, 7:58 PM EDT	Special Weather Statement	CTP	32 min
Jul 26, 3:39 PM EDT	Mesoscale Discussion	SPC	66 min
Jul 29, 12:57 PM EDT	Mesoscale Discussion	SPC	2 hr
Jul 29, 2:40 PM EDT	Severe Thunderstorm Watch	SPC	8 hr
Jul 29, 4:40 PM EDT	Mesoscale Discussion	SPC	95 min
Aug 1, 8:01 AM EDT	Mesoscale Discussion	SPC	89 min
Aug 1, 12:07 PM EDT	Mesoscale Discussion	SPC	53 min
Aug 1, 10:20 PM EDT	Special Weather Statement	CTP	55 min
Aug 14, 1:40 PM EDT	Areal Flood Advisory	CTP	3 hr
Aug 19, 1:36 PM EDT	Special Weather Statement	CTP	39 min
Aug 19, 5:38 PM EDT	Special Weather Statement	CTP	52 min
Aug 19, 6:27 PM EDT	Special Weather Statement	CTP	63 min
Aug 19, 10:51 PM EDT	Special Weather Statement	CTP	54 min
Aug 20, 4:15 AM EDT	Dense Fog Advisory	CTP	7 hr
Aug 24, 11:48 PM EDT	Mesoscale Discussion	SPC	87 min
Aug 25, 12:42 AM EDT	Severe Thunderstorm Watch	SPC	5 hr
Aug 25, 2:31 AM EDT	Mesoscale Discussion	SPC	119 min
Aug 25, 3:22 AM EDT	Special Weather Statement	CTP	53 min
Aug 27, 4:15 AM EDT	Wind Advisory	CTP	37 hr
Sep 1, 8:35 AM EDT	Special Weather Statement	CTP	40 min
Sep 3, 5:12 PM EDT	Special Weather Statement	CTP	18 min
Sep 3, 5:33 PM EDT	Special Weather Statement	CTP	27 min
Sep 3, 6:08 PM EDT	Areal Flood Advisory	CTP	112 min
Sep 4, 1:33 PM EDT	Mesoscale Discussion	SPC	87 min
Sep 4, 2:43 PM EDT	Severe Thunderstorm Watch	SPC	8 hr
Sep 4, 6:06 PM EDT	Mesoscale Discussion	SPC	54 min
Sep 4, 8:35 PM EDT	Mesoscale Discussion	SPC	55 min
Sep 4, 11:29 PM EDT	Flash Flood Watch	CTP	21 hr
Sep 5, 9:07 PM EDT	Flood Watch	CTP	71 hr
Sep 7, 2:53 AM EDT	Areal Flood Advisory	CTP	6 hr
Sep 7, 10:23 AM EDT	Flash Flood Warning Emergency	CTP	12 hr
Sep 7, 12:09 PM EDT	Areal Flood Warning	CTP	12 hr
Sep 7, 10:09 PM EDT	Flash Flood Warning Emergency	CTP	6 hr
Sep 8, 12:55 AM EDT	River Flood Warning	CTP	8 hr
Sep 8, 4:01 AM EDT	Areal Flood Warning	CTP	34 hr
Sep 12, 12:29 AM EDT	Dense Fog Advisory	CTP	10 hr
Sep 23, 1:15 AM EDT	Dense Fog Advisory	CTP	9 hr
Sep 27, 9:12 AM EDT	Flash Flood Watch	CTP	40 hr
Sep 27, 5:14 PM EDT	Areal Flood Advisory	CTP	4 hr
Sep 27, 10:06 PM EDT	Areal Flood Advisory	CTP	3 hr
Sep 28, 12:58 AM EDT	Areal Flood Advisory	CTP	3 hr
Sep 28, 4:06 PM EDT	Flash Flood Warning	CTP	3 hr
Sep 28, 9:26 PM EDT	Areal Flood Warning	CTP	6 hr
Sep 29, 3:20 PM EDT	Areal Flood Advisory	CTP	3 hr
Oct 4, 3:32 PM EDT	Freeze Watch	CTP	12 hr
Oct 5, 3:35 AM EDT	Frost Advisory	CTP	29 hr
Oct 6, 1:09 PM EDT	Frost Advisory	CTP	19 hr
Oct 6, 9:47 PM EDT	Freeze Warning	CTP	10 hr
Oct 22, 5:22 AM EDT	Frost Advisory	CTP	28 hr
Oct 28, 2:12 AM EDT	Winter Storm Watch	CTP	11 hr
Oct 28, 1:08 PM EDT	Winter Storm Warning	CTP	33 hr
Oct 31, 5:26 AM EDT	Dense Fog Advisory	CTP	4 hr
Nov 14, 6:03 PM EST	Mesoscale Discussion	SPC	117 min
Nov 14, 7:35 PM EST	Severe Thunderstorm Warning	CTP	55 min
Nov 14, 8:29 PM EST	Severe Thunderstorm Warning	CTP	31 min
Nov 14, 8:44 PM EST	Special Weather Statement	CTP	46 min
Nov 18, 1:12 AM EST	Special Weather Statement	CTP	93 min
Nov 22, 6:45 PM EST	Special Weather Statement	CTP	2 hr
Dec 7, 4:51 AM EST	Winter Weather Advisory	CTP	20 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	22
Tornado Warning	2
Severe Thunderstorm Watch	14
Tornado Watch	2
Mesoscale Discussion	45
Special Weather Statement	48
Flooding
Areal Flood Warning	8
Flash Flood Warning	6
River Flood Warning	1
Flash Flood Watch	4
Flood Watch	5
Areal Flood Advisory	18
Winter
Winter Storm Warning	6
Winter Storm Watch	5
Winter Weather Advisory	11
Heat
Excessive Heat Watch	1
Heat Advisory	1
Cold
Freeze Warning	1
Freeze Watch	1
Frost Advisory	5
Wind Chill Advisory	2
Wind and dust
High Wind Warning	1
High Wind Watch	1
Wind Advisory	4
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 2010 2012

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.