Weather alerts in Lewis County, New York, 2017

194 weather alerts in 2017, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Lewis County and its neighbors

Each county as a circle sized by its count in 2017. Tap one for its archive.

Alerts: 194
Warnings: 48
Watches: 27
Advisories: 29
Busiest month: December41 alerts
Busiest day: August 22, 201711 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 Lewis County in 2017 had a tornado report inside them.

Lewis County, 2017

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	2	0	100%	0
Severe thunderstorm warnings	22	17	23%	19	95%	35 min
Flash flood warnings	0			0

Each office's whole area, 2017

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Buffalo, NY: tornado warnings	8	3	63%	3	100%	9 min
NWS Buffalo, NY: severe thunderstorm warnings	138	97	30%	385	91%	24 min
NWS Buffalo, NY: flash flood warnings	11	8	27%	36	100%	94 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, 5:55 PM EST	Lake Effect Snow Watch	BUF	21 hr
Jan 3, 3:01 PM EST	Lake Effect Snow Warning	BUF	5 days
Jan 3, 3:13 PM EST	Wind Advisory	BUF	30 hr
Jan 4, 7:31 PM EST	Special Weather Statement	BUF	119 min
Jan 5, 7:44 AM EST	Special Weather Statement	BUF	91 min
Jan 5, 9:17 AM EST	Special Weather Statement	BUF	88 min
Jan 5, 9:56 PM EST	Special Weather Statement	BUF	79 min
Jan 9, 2:46 PM EST	Winter Weather Advisory	BUF	38 hr
Jan 9, 3:00 PM EST	Wind Advisory	BUF	43 hr
Jan 16, 3:24 AM EST	Winter Weather Advisory	BUF	48 hr
Jan 17, 11:10 AM EST	Mesoscale Discussion	SPC	6 hr
Jan 18, 5:10 PM EST	Winter Weather Advisory	BUF	16 hr
Jan 22, 2:20 PM EST	Winter Storm Watch	BUF	13 hr
Jan 23, 3:42 AM EST	Winter Storm Warning	BUF	24 hr
Jan 23, 3:42 AM EST	Winter Weather Advisory	BUF	39 hr
Jan 25, 3:40 AM EST	Lake Effect Snow Watch	BUF	57 hr
Jan 25, 7:40 AM EST	Winter Weather Advisory	BUF	7 hr
Jan 25, 4:01 PM EST	Lake Effect Snow Warning	BUF	4 days
Jan 29, 4:56 AM EST	Special Weather Statement	BUF	64 min
Jan 29, 7:20 AM EST	Special Weather Statement	BUF	115 min
Jan 29, 8:22 AM EST	Mesoscale Discussion	SPC	4 hr
Jan 29, 9:16 AM EST	Special Weather Statement	BUF	119 min
Jan 29, 11:46 AM EST	Special Weather Statement	BUF	119 min
Jan 29, 2:36 PM EST	Special Weather Statement	BUF	114 min
Jan 30, 12:47 PM EST	Winter Weather Advisory	BUF	44 hr
Jan 31, 2:51 PM EST	Lake Effect Snow Watch	BUF	22 hr
Feb 1, 6:47 AM EST	Special Weather Statement	BUF	58 min
Feb 1, 7:50 AM EST	Special Weather Statement	BUF	85 min
Feb 1, 8:21 AM EST	Lake Effect Snow Warning	BUF	37 hr
Feb 1, 9:17 AM EST	Special Weather Statement	BUF	73 min
Feb 1, 10:32 AM EST	Special Weather Statement	BUF	73 min
Feb 1, 11:51 AM EST	Special Weather Statement	BUF	54 min
Feb 1, 12:33 PM EST	Mesoscale Discussion	SPC	6 hr
Feb 1, 12:58 PM EST	Lake Effect Snow Warning	BUF	72 hr
Feb 4, 3:45 AM EST	Lake Effect Snow Advisory	BUF	15 hr
Feb 6, 2:04 PM EST	Winter Weather Advisory	BUF	35 hr
Feb 10, 2:19 PM EST	Winter Storm Watch	BUF	24 hr
Feb 11, 2:14 PM EST	Winter Storm Warning	BUF	45 hr
Feb 12, 9:59 AM EST	Mesoscale Discussion	SPC	5 hr
Feb 15, 3:47 AM EST	Winter Weather Advisory	BUF	33 hr
Feb 23, 3:24 AM EST	Flood Watch	BUF	3 days
Feb 24, 1:02 PM EST	River Flood Warning	BUF	56 hr
Feb 24, 1:02 PM EST	River Flood Warning	BUF	67 hr
Feb 24, 2:50 PM EST	River Flood Warning	BUF	58 hr
Feb 25, 6:03 AM EST	Areal Flood Warning	BUF	24 hr
Feb 25, 12:16 PM EST	Mesoscale Discussion	SPC	89 min
Feb 25, 12:23 PM EST	Severe Thunderstorm Warning	BUF	31 min
Feb 28, 2:51 PM EST	Wind Advisory	BUF	43 hr
Feb 28, 2:52 PM EST	Flood Watch	BUF	36 hr
Mar 1, 7:29 PM EST	Special Weather Statement	BUF	91 min
Mar 3, 3:55 AM EST	Wind Chill Advisory	BUF	29 hr
Mar 7, 9:43 AM EST	Wind Advisory	BUF	36 hr
Mar 10, 3:34 AM EST	Wind Chill Advisory	BUF	30 hr
Mar 11, 2:42 PM EST	Wind Chill Advisory	BUF	16 hr
Mar 11, 2:42 PM EST	Winter Storm Watch	BUF	37 hr
Mar 12, 3:07 PM EDT	Winter Storm Warning	BUF	3 days
Mar 14, 9:04 AM EDT	Mesoscale Discussion	SPC	4 hr
Mar 23, 1:22 PM EDT	Winter Weather Advisory	BUF	23 hr
Mar 24, 7:45 PM EDT	Winter Weather Advisory	BUF	15 hr
Mar 26, 6:14 AM EDT	Freezing Rain Advisory	BUF	5 hr
Mar 30, 1:52 PM EDT	Winter Weather Advisory	BUF	44 hr
Apr 3, 2:55 PM EDT	Flood Watch	BUF	4 days
Apr 7, 9:29 AM EDT	River Flood Warning	BUF	58 hr
Apr 16, 2:15 PM EDT	Mesoscale Discussion	SPC	3 hr
May 1, 6:16 AM EDT	Flood Watch	BUF	13 hr
May 1, 2:12 PM EDT	Tornado Watch	SPC	8 hr
May 1, 6:09 PM EDT	Severe Thunderstorm Warning	BUF	66 min
May 1, 6:29 PM EDT	Mesoscale Discussion	SPC	61 min
May 6, 2:12 PM EDT	Special Weather Statement	BUF	78 min
May 18, 2:04 PM EDT	Mesoscale Discussion	SPC	116 min
May 18, 3:36 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
May 18, 5:28 PM EDT	Severe Thunderstorm Warning	BUF	47 min
May 18, 5:36 PM EDT	Mesoscale Discussion	SPC	84 min
May 18, 5:41 PM EDT	Severe Thunderstorm Warning	BUF	64 min
May 18, 6:17 PM EDT	Severe Thunderstorm Warning	BUF	28 min
May 18, 6:45 PM EDT	Special Weather Statement	BUF	45 min
May 30, 12:39 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
May 30, 4:03 PM EDT	Mesoscale Discussion	SPC	117 min
May 30, 4:41 PM EDT	Special Weather Statement	BUF	49 min
May 31, 12:23 PM EDT	Special Weather Statement	BUF	22 min
May 31, 12:47 PM EDT	Special Weather Statement	BUF	28 min
Jun 5, 7:47 PM EDT	Special Weather Statement	BUF	58 min
Jun 17, 10:50 PM EDT	Flash Flood Watch	BUF	22 hr
Jun 18, 1:37 PM EDT	Severe Thunderstorm Watch	SPC	8 hr
Jun 18, 4:53 PM EDT	Special Weather Statement	BUF	67 min
Jun 18, 5:14 PM EDT	Special Weather Statement	BUF	61 min
Jun 18, 5:16 PM EDT	Severe Thunderstorm Warning	BUF	59 min
Jun 18, 7:13 PM EDT	Severe Thunderstorm Warning	BUF	62 min
Jun 18, 8:13 PM EDT	Severe Thunderstorm Warning	BUF	32 min
Jun 23, 2:02 PM EDT	Mesoscale Discussion	SPC	2 hr
Jun 27, 1:14 PM EDT	Special Weather Statement	BUF	61 min
Jul 2, 11:31 PM EDT	Special Weather Statement	BUF	59 min
Jul 8, 4:42 AM EDT	Severe Thunderstorm Warning	BUF	49 min
Jul 8, 4:43 PM EDT	Special Weather Statement	BUF	32 min
Jul 17, 5:40 AM EDT	Severe Thunderstorm Warning	BUF	65 min
Jul 17, 8:33 AM EDT	Special Weather Statement	BUF	27 min
Jul 17, 9:19 AM EDT	Special Weather Statement	BUF	56 min
Jul 17, 9:52 AM EDT	Special Weather Statement	ALY	38 min
Jul 17, 2:37 PM EDT	Special Weather Statement	BUF	38 min
Jul 17, 3:17 PM EDT	Special Weather Statement	BUF	28 min
Aug 2, 1:30 PM EDT	Mesoscale Discussion	SPC	2 hr
Aug 3, 12:22 PM EDT	Special Weather Statement	BUF	38 min
Aug 3, 12:35 PM EDT	Severe Thunderstorm Warning	BUF	32 min
Aug 3, 1:56 PM EDT	Special Weather Statement	BUF	34 min
Aug 4, 1:25 PM EDT	Severe Thunderstorm Watch	SPC	8 hr
Aug 4, 3:00 PM EDT	Severe Thunderstorm Warning	BUF	45 min
Aug 4, 3:46 PM EDT	Mesoscale Discussion	SPC	119 min
Aug 4, 5:51 PM EDT	Severe Thunderstorm Warning	BUF	54 min
Aug 4, 6:38 PM EDT	Severe Thunderstorm Warning	BUF	52 min
Aug 4, 7:09 PM EDT	Severe Thunderstorm Warning	BUF	66 min
Aug 4, 7:41 PM EDT	Mesoscale Discussion	SPC	2 hr
Aug 7, 7:07 PM EDT	Special Weather Statement	BUF	68 min
Aug 12, 2:40 PM EDT	Severe Thunderstorm Warning	BUF	65 min
Aug 12, 2:44 PM EDT	Severe Thunderstorm Watch	SPC	5 hr
Aug 12, 3:23 PM EDT	Severe Thunderstorm Warning	BUF	24 min
Aug 15, 1:38 PM EDT	Mesoscale Discussion	SPC	2 hr
Aug 22, 7:16 AM EDT	Special Weather Statement	BUF	59 min
Aug 22, 11:55 AM EDT	Mesoscale Discussion	SPC	3 hr
Aug 22, 12:23 PM EDT	Tornado Watch	SPC	9 hr
Aug 22, 1:53 PM EDT	Severe Thunderstorm Warning	BUF	67 min
Aug 22, 2:05 PM EDT	Severe Thunderstorm Warning	BUF	55 min
Aug 22, 2:44 PM EDT	Mesoscale Discussion	SPC	2 hr
Aug 22, 2:47 PM EDT	Severe Thunderstorm Warning	BUF	58 min
Aug 22, 3:11 PM EDT	Tornado Warning	BUF	34 min
Aug 22, 3:15 PM EDT	Tornado Warning	BUF	30 min
Aug 22, 4:48 PM EDT	Mesoscale Discussion	SPC	87 min
Aug 22, 5:29 PM EDT	Severe Thunderstorm Warning	BUF	61 min
Sep 1, 4:54 AM EDT	Frost Advisory	BUF	27 hr
Sep 7, 10:29 AM EDT	Special Weather Statement	BUF	61 min
Sep 30, 4:36 AM EDT	Frost Advisory	BUF	27 hr
Oct 1, 2:49 PM EDT	Frost Advisory	BUF	17 hr
Oct 4, 9:02 PM EDT	Special Weather Statement	BUF	43 min
Oct 8, 8:03 AM EDT	Special Weather Statement	BUF	57 min
Oct 8, 9:02 AM EDT	Special Weather Statement	BUF	43 min
Oct 15, 3:03 PM EDT	Mesoscale Discussion	SPC	57 min
Oct 15, 5:56 PM EDT	Severe Thunderstorm Warning	BUF	64 min
Oct 23, 4:35 AM EDT	Wind Advisory	BUF	27 hr
Oct 28, 3:54 AM EDT	High Wind Watch	BUF	25 hr
Oct 28, 4:02 AM EDT	Flash Flood Watch	BUF	48 hr
Oct 29, 4:30 AM EDT	High Wind Warning	BUF	37 hr
Oct 29, 4:30 AM EDT	Wind Advisory	BUF	37 hr
Oct 30, 12:00 AM EDT	Areal Flood Warning	BUF	12 hr
Oct 30, 6:24 AM EDT	Flash Flood Watch	BUF	35 hr
Oct 30, 8:01 PM EDT	Areal Flood Warning	BUF	23 hr
Nov 4, 2:46 PM EDT	Flood Watch	BUF	33 hr
Nov 5, 9:48 PM EST	Areal Flood Warning	BUF	24 hr
Nov 19, 2:31 PM EST	Lake Effect Snow Warning	BUF	26 hr
Nov 20, 9:05 AM EST	Special Weather Statement	BUF	55 min
Nov 20, 9:59 AM EST	Special Weather Statement	BUF	61 min
Nov 20, 10:59 AM EST	Special Weather Statement	BUF	61 min
Nov 20, 12:02 PM EST	Special Weather Statement	BUF	58 min
Nov 20, 1:00 PM EST	Special Weather Statement	BUF	60 min
Nov 26, 3:36 AM EST	Winter Weather Advisory	BUF	30 hr
Dec 4, 3:38 AM EST	Winter Storm Watch	BUF	33 hr
Dec 5, 1:01 PM EST	Lake Effect Snow Warning	BUF	68 hr
Dec 9, 3:43 AM EST	Winter Storm Watch	BUF	10 hr
Dec 9, 1:59 PM EST	Lake Effect Snow Warning	BUF	38 hr
Dec 10, 11:17 AM EST	Special Weather Statement	BUF	58 min
Dec 10, 12:15 PM EST	Special Weather Statement	BUF	60 min
Dec 10, 1:21 PM EST	Special Weather Statement	BUF	84 min
Dec 10, 2:49 PM EST	Special Weather Statement	BUF	86 min
Dec 10, 4:08 PM EST	Special Weather Statement	BUF	112 min
Dec 10, 6:05 PM EST	Special Weather Statement	BUF	115 min
Dec 10, 8:21 PM EST	Special Weather Statement	BUF	114 min
Dec 10, 8:55 PM EST	Mesoscale Discussion	SPC	5 hr
Dec 10, 9:58 PM EST	Special Weather Statement	BUF	32 min
Dec 10, 10:38 PM EST	Special Weather Statement	BUF	82 min
Dec 11, 3:48 AM EST	Winter Storm Watch	BUF	9 hr
Dec 11, 1:07 PM EST	Winter Storm Warning	BUF	54 hr
Dec 11, 10:30 PM EST	Mesoscale Discussion	SPC	6 hr
Dec 14, 12:45 PM EST	Winter Storm Watch	BUF	15 hr
Dec 14, 9:46 PM EST	Lake Effect Snow Warning	BUF	42 hr
Dec 16, 12:01 AM EST	Special Weather Statement	BUF	29 min
Dec 19, 3:53 AM EST	Winter Weather Advisory	BUF	21 hr
Dec 21, 3:21 AM EST	Winter Weather Advisory	BUF	63 hr
Dec 23, 6:35 PM EST	Winter Storm Watch	BUF	9 hr
Dec 24, 4:00 AM EST	Lake Effect Snow Warning	BUF	4 days
Dec 25, 12:49 PM EST	Special Weather Statement	BUF	86 min
Dec 25, 2:15 PM EST	Special Weather Statement	BUF	90 min
Dec 25, 3:47 PM EST	Special Weather Statement	BUF	88 min
Dec 25, 5:18 PM EST	Special Weather Statement	BUF	87 min
Dec 25, 6:54 PM EST	Special Weather Statement	BUF	51 min
Dec 25, 7:48 PM EST	Special Weather Statement	BUF	57 min
Dec 25, 8:48 PM EST	Special Weather Statement	BUF	57 min
Dec 25, 9:50 PM EST	Special Weather Statement	BUF	85 min
Dec 26, 5:34 AM EST	Special Weather Statement	BUF	116 min
Dec 26, 7:49 AM EST	Special Weather Statement	BUF	3 hr
Dec 26, 10:40 AM EST	Special Weather Statement	BUF	3 hr
Dec 26, 1:34 PM EST	Special Weather Statement	BUF	3 hr
Dec 26, 4:33 PM EST	Special Weather Statement	BUF	117 min
Dec 26, 6:30 PM EST	Special Weather Statement	BUF	2 hr
Dec 27, 4:13 AM EST	Wind Chill Warning	BUF	47 hr
Dec 30, 3:38 AM EST	Wind Chill Advisory	BUF	54 hr
Dec 30, 2:23 PM EST	Wind Chill Warning	BUF	43 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	5
Tornado Watch	2
Mesoscale Discussion	22
Special Weather Statement	68
Flooding
Areal Flood Warning	4
River Flood Warning	4
Flash Flood Watch	3
Flood Watch	5
Winter
Lake Effect Snow Warning	9
Winter Storm Warning	4
Lake Effect Snow Watch	3
Winter Storm Watch	8
Freezing Rain Advisory	1
Lake Effect Snow Advisory	1
Winter Weather Advisory	14
Cold
Wind Chill Warning	2
Frost Advisory	3
Wind Chill Advisory	4
Wind and dust
High Wind Warning	1
High Wind Watch	1
Wind Advisory	6

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2016 2018

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.