Alert archive / New York / Chautauqua County

Weather alerts in Chautauqua County, New York, 2011

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

Chautauqua County and its neighbors

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

Alerts: 167
Warnings: 44
Watches: 26
Advisories: 58
Busiest month: May28 alerts
Busiest day: May 26, 20118 alerts

Over time

By month

Warning verification

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

2 of 7 tornado warnings covering Chautauqua County in 2011 had a tornado report inside them; 2 of 2 tornado reports fell inside a warning, on average 9 minutes after it went out.

Chautauqua County, 2011

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	7	2	71%	2	100%	9 min
Severe thunderstorm warnings	16	11	31%	19	84%	28 min
Flash flood warnings	6	3	50%	5	80%	80 min

Each office's whole area, 2011

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Buffalo, NY: tornado warnings	13	2	85%	2	100%	9 min
NWS Buffalo, NY: severe thunderstorm warnings	106	55	48%	151	81%	23 min
NWS Buffalo, NY: flash flood warnings	23	10	57%	23	91%	63 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, 3:39 AM EST	Lake Effect Snow Advisory	BUF	30 hr
Jan 4, 3:56 AM EST	Lake Effect Snow Advisory	BUF	26 hr
Jan 6, 3:28 PM EST	Winter Weather Advisory	BUF	28 hr
Jan 7, 3:25 PM EST	Lake Effect Snow Watch	BUF	12 hr
Jan 8, 3:12 AM EST	Lake Effect Snow Advisory	BUF	12 hr
Jan 8, 3:27 PM EST	Lake Effect Snow Warning	BUF	12 hr
Jan 10, 3:26 PM EST	Winter Weather Advisory	BUF	49 hr
Jan 12, 12:29 PM EST	Lake Effect Snow Advisory	BUF	24 hr
Jan 14, 11:23 AM EST	Lake Effect Snow Advisory	BUF	8 hr
Jan 15, 4:30 AM EST	Winter Weather Advisory	BUF	29 hr
Jan 18, 3:23 AM EST	Winter Weather Advisory	BUF	8 hr
Jan 19, 4:30 AM EST	Winter Weather Advisory	BUF	10 hr
Jan 21, 4:21 AM EST	Lake Effect Snow Warning	BUF	32 hr
Jan 21, 4:21 AM EST	Lake Effect Snow Advisory	BUF	17 hr
Jan 23, 10:15 AM EST	Wind Chill Advisory	BUF	23 hr
Jan 31, 4:11 AM EST	Winter Storm Watch	BUF	12 hr
Jan 31, 3:50 PM EST	Winter Storm Warning	BUF	42 hr
Jan 31, 3:50 PM EST	Winter Weather Advisory	BUF	16 hr
Feb 2, 4:12 AM EST	Winter Weather Advisory	BUF	23 hr
Feb 5, 4:07 AM EST	Winter Weather Advisory	BUF	23 hr
Feb 8, 3:28 PM EST	Wind Chill Advisory	BUF	19 hr
Feb 10, 3:23 PM EST	Wind Chill Advisory	BUF	16 hr
Feb 13, 3:45 PM EST	Wind Advisory	BUF	23 hr
Feb 16, 3:54 AM EST	Flood Watch	BUF	3 days
Feb 18, 4:37 AM EST	Wind Advisory	BUF	35 hr
Feb 18, 10:04 AM EST	Areal Flood Advisory	BUF	29 hr
Feb 19, 9:55 PM EST	Winter Storm Watch	BUF	6 hr
Feb 20, 4:06 AM EST	Winter Weather Advisory	BUF	27 hr
Feb 20, 3:03 PM EST	Winter Storm Warning	BUF	17 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, 3:30 PM EST	Winter Storm Watch	BUF	22 hr
Feb 24, 1:26 PM EST	Winter Storm Warning	BUF	28 hr
Feb 25, 2:46 AM EST	Mesoscale Discussion	SPC	4 hr
Feb 27, 2:47 PM EST	Flood Watch	BUF	30 hr
Feb 28, 4:15 AM EST	Areal Flood Warning	BUF	6 hr
Feb 28, 3:02 PM EST	Areal Flood Warning	BUF	19 hr
Mar 3, 3:21 PM EST	Winter Weather Advisory	BUF	19 hr
Mar 4, 3:45 AM EST	Flood Watch	BUF	47 hr
Mar 5, 11:52 AM EST	Winter Storm Watch	BUF	10 hr
Mar 5, 9:28 PM EST	Winter Weather Advisory	BUF	13 hr
Mar 8, 3:23 PM EST	Wind Advisory	BUF	62 hr
Mar 9, 11:41 AM EST	Flood Watch	BUF	46 hr
Mar 11, 2:08 AM EST	River Flood Warning	BUF	4 hr
Mar 11, 3:48 AM EST	Winter Weather Advisory	BUF	18 hr
Mar 22, 4:02 PM EDT	Winter Weather Advisory	BUF	30 hr
Mar 23, 3:32 AM EDT	Mesoscale Discussion	SPC	4 hr
Mar 23, 3:50 AM EDT	Winter Storm Warning	BUF	18 hr
Apr 3, 3:55 PM EDT	Flood Watch	BUF	30 hr
Apr 6, 5:39 PM EDT	Winter Weather Advisory	BUF	10 hr
Apr 7, 5:04 AM EDT	Dense Fog Advisory	BUF	4 hr
Apr 11, 1:12 PM EDT	Wind Advisory	BUF	9 hr
Apr 15, 3:47 PM EDT	High Wind Warning	BUF	30 hr
Apr 16, 4:36 AM EDT	High Wind Watch	BUF	11 hr
Apr 16, 3:33 PM EDT	Wind Advisory	BUF	12 hr
Apr 17, 3:36 AM EDT	High Wind Warning	BUF	14 hr
Apr 20, 12:46 AM EDT	Special Weather Statement	BUF	59 min
Apr 20, 1:26 AM EDT	Special Weather Statement	BUF	64 min
Apr 20, 3:07 PM EDT	Wind Advisory	BUF	5 hr
Apr 25, 3:54 AM EDT	Flood Watch	BUF	22 hr
Apr 25, 7:04 PM EDT	Special Weather Statement	BUF	56 min
Apr 25, 8:36 PM EDT	Areal Flood Advisory	BUF	6 hr
Apr 27, 1:24 PM EDT	Mesoscale Discussion	SPC	96 min
Apr 27, 1:58 PM EDT	Flash Flood Watch	BUF	22 hr
Apr 27, 1:58 PM EDT	Wind Advisory	BUF	26 hr
Apr 27, 3:10 PM EDT	Tornado Watch	SPC	7 hr
Apr 27, 4:49 PM EDT	Special Weather Statement	BUF	41 min
Apr 27, 5:06 PM EDT	Severe Thunderstorm Warning	BUF	54 min
Apr 28, 4:39 AM EDT	High Wind Warning	BUF	15 hr
May 13, 4:02 PM EDT	Areal Flood Advisory	BUF	5 hr
May 13, 4:17 PM EDT	Flash Flood Warning	BUF	3 hr
May 14, 4:17 AM EDT	Flash Flood Watch	BUF	24 hr
May 15, 4:15 AM EDT	Flood Watch	BUF	23 hr
May 15, 12:47 PM EDT	Areal Flood Advisory	BUF	3 hr
May 19, 4:08 PM EDT	Special Weather Statement	BUF	52 min
May 23, 8:07 PM EDT	Mesoscale Discussion	SPC	83 min
May 23, 8:23 PM EDT	Severe Thunderstorm Warning	BUF	37 min
May 23, 8:54 PM EDT	Tornado Warning	BUF	36 min
May 23, 9:24 PM EDT	Flash Flood Warning	BUF	3 hr
May 23, 9:59 PM EDT	Flash Flood Warning	BUF	3 hr
May 23, 10:56 PM EDT	Areal Flood Advisory	BUF	3 hr
May 25, 8:28 PM EDT	Special Weather Statement	BUF	62 min
May 25, 9:01 PM EDT	Severe Thunderstorm Warning	BUF	59 min
May 25, 10:11 PM EDT	Areal Flood Advisory	BUF	3 hr
May 26, 5:30 PM EDT	Severe Thunderstorm Warning	BUF	60 min
May 26, 5:43 PM EDT	Tornado Warning	BUF	32 min
May 26, 6:06 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
May 26, 6:08 PM EDT	Tornado Warning	BUF	38 min
May 26, 7:05 PM EDT	Areal Flood Advisory	BUF	3 hr
May 27, 3:17 PM EDT	Areal Flood Advisory	BUF	3 hr
May 27, 4:10 PM EDT	Areal Flood Warning	BUF	4 hr
May 27, 5:23 PM EDT	Areal Flood Advisory	BUF	3 hr
May 29, 6:05 PM EDT	Mesoscale Discussion	SPC	25 min
May 29, 8:34 PM EDT	Severe Thunderstorm Warning	BUF	56 min
May 29, 8:52 PM EDT	Severe Thunderstorm Watch	SPC	5 hr
May 29, 9:17 PM EDT	Severe Thunderstorm Warning	BUF	58 min
May 29, 9:47 PM EDT	Mesoscale Discussion	SPC	58 min
Jun 2, 3:36 PM EDT	Frost Advisory	BUF	16 hr
Jun 7, 7:13 AM EDT	Special Weather Statement	BUF	62 min
Jun 8, 1:51 AM EDT	Severe Thunderstorm Watch	SPC	3 hr
Jun 8, 2:29 AM EDT	Severe Thunderstorm Warning	BUF	61 min
Jun 8, 3:22 AM EDT	Severe Thunderstorm Warning	BUF	68 min
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 16, 6:20 PM EDT	Special Weather Statement	BUF	55 min
Jun 16, 6:26 PM EDT	Severe Thunderstorm Warning	BUF	48 min
Jun 20, 4:51 AM EDT	Flash Flood Warning	BUF	3 hr
Jun 22, 2:03 AM EDT	Special Weather Statement	BUF	87 min
Jun 23, 3:27 PM EDT	Mesoscale Discussion	SPC	2 hr
Jun 28, 1:19 PM EDT	Mesoscale Discussion	SPC	86 min
Jul 18, 3:58 PM EDT	Mesoscale Discussion	SPC	92 min
Jul 20, 3:35 AM EDT	Excessive Heat Watch	BUF	12 hr
Jul 20, 3:17 PM EDT	Heat Advisory	BUF	28 hr
Jul 23, 10:23 PM EDT	Special Weather Statement	BUF	37 min
Jul 25, 11:37 AM EDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 29, 3:22 AM EDT	Severe Thunderstorm Warning	BUF	53 min
Jul 29, 3:31 AM EDT	Mesoscale Discussion	SPC	89 min
Jul 29, 3:56 AM EDT	Severe Thunderstorm Watch	SPC	5 hr
Jul 29, 4:16 AM EDT	Severe Thunderstorm Warning	BUF	24 min
Jul 29, 5:02 AM EDT	Special Weather Statement	BUF	88 min
Jul 29, 6:28 AM EDT	Areal Flood Advisory	BUF	3 hr
Aug 1, 3:47 AM EDT	Mesoscale Discussion	SPC	58 min
Aug 1, 8:01 AM EDT	Mesoscale Discussion	SPC	89 min
Aug 7, 7:52 AM EDT	Special Weather Statement	BUF	53 min
Aug 7, 8:10 PM EDT	Special Weather Statement	BUF	65 min
Aug 20, 4:37 PM EDT	Mesoscale Discussion	SPC	83 min
Aug 21, 12:27 PM EDT	Special Weather Statement	BUF	63 min
Aug 21, 1:03 PM EDT	Special Weather Statement	BUF	57 min
Aug 24, 9:18 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
Aug 24, 10:34 PM EDT	Severe Thunderstorm Warning	BUF	56 min
Aug 25, 12:27 AM EDT	Special Weather Statement	BUF	63 min
Aug 25, 12:42 AM EDT	Areal Flood Advisory	BUF	3 hr
Aug 25, 2:31 AM EDT	Mesoscale Discussion	SPC	119 min
Sep 1, 5:30 AM EDT	Areal Flood Advisory	BUF	3 hr
Sep 4, 3:21 AM EDT	Severe Thunderstorm Warning	BUF	54 min
Sep 4, 3:26 AM EDT	Severe Thunderstorm Watch	SPC	4 hr
Sep 4, 5:20 AM EDT	Special Weather Statement	BUF	40 min
Sep 9, 4:21 PM EDT	Areal Flood Advisory	BUF	3 hr
Sep 9, 5:12 PM EDT	Flash Flood Warning	BUF	3 hr
Sep 11, 12:40 PM EDT	Flash Flood Warning	BUF	3 hr
Sep 11, 4:31 PM EDT	Special Weather Statement	BUF	59 min
Sep 13, 7:00 PM EDT	Mesoscale Discussion	SPC	60 min
Sep 21, 6:34 PM EDT	Special Weather Statement	BUF	56 min
Sep 21, 7:20 PM EDT	Special Weather Statement	BUF	55 min
Oct 5, 3:58 AM EDT	Frost Advisory	BUF	28 hr
Oct 6, 3:25 PM EDT	Frost Advisory	BUF	16 hr
Oct 13, 3:58 PM EDT	High Wind Watch	BUF	24 hr
Oct 14, 3:51 PM EDT	High Wind Warning	BUF	35 hr
Oct 14, 3:54 PM EDT	Lakeshore Flood Advisory	BUF	28 hr
Oct 16, 3:55 PM EDT	Wind Advisory	BUF	27 hr
Oct 22, 3:34 PM EDT	Frost Advisory	BUF	17 hr
Oct 27, 3:48 AM EDT	Freeze Warning	BUF	29 hr
Nov 10, 1:04 AM EST	Lakeshore Flood Advisory	BUF	3 hr
Nov 10, 3:47 PM EST	Lake Effect Snow Advisory	BUF	20 hr
Nov 14, 4:41 PM EST	Severe Thunderstorm Warning	BUF	64 min
Nov 14, 4:47 PM EST	Tornado Warning	BUF	43 min
Nov 14, 4:54 PM EST	Tornado Warning	BUF	36 min
Nov 14, 5:30 PM EST	Tornado Warning	BUF	30 min
Nov 14, 5:46 PM EST	Severe Thunderstorm Warning	BUF	59 min
Nov 14, 5:59 PM EST	Severe Thunderstorm Warning	BUF	61 min
Nov 14, 6:38 PM EST	Tornado Warning	BUF	37 min
Nov 14, 7:11 PM EST	Areal Flood Advisory	BUF	3 hr
Nov 17, 3:59 AM EST	Lake Effect Snow Advisory	BUF	35 hr
Dec 6, 3:24 PM EST	Winter Weather Advisory	BUF	18 hr
Dec 8, 12:14 PM EST	Lake Effect Snow Advisory	BUF	58 hr
Dec 27, 4:28 AM EST	Winter Weather Advisory	BUF	45 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	16
Tornado Warning	7
Severe Thunderstorm Watch	8
Tornado Watch	1
Mesoscale Discussion	19
Special Weather Statement	20
Flooding
Areal Flood Warning	3
Flash Flood Warning	6
River Flood Warning	1
Flash Flood Watch	2
Flood Watch	7
Areal Flood Advisory	14
Winter
Lake Effect Snow Warning	2
Winter Storm Warning	4
Lake Effect Snow Watch	1
Winter Storm Watch	4
Lake Effect Snow Advisory	9
Winter Weather Advisory	16
Heat
Excessive Heat Watch	1
Heat Advisory	1
Cold
Freeze Warning	1
Frost Advisory	4
Wind Chill Advisory	3
Wind and dust
High Wind Warning	4
High Wind Watch	2
Wind Advisory	8
Fog and smoke
Dense Fog Advisory	1
Coast and beach
Lakeshore Flood Advisory	2

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.