Alert archive / New York / Chemung County

Weather alerts in Chemung County, New York, 2021

160 weather alerts in 2021, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Chemung County and its neighbors

Each county as a circle sized by its count in 2021. Tap one for its archive.

Alerts: 160
Warnings: 35
Watches: 22
Advisories: 43
Busiest month: July57 alerts
Busiest day: August 13, 20219 alerts

Over time

By month

Warning verification

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

Chemung County, 2021

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	0			0
Severe thunderstorm warnings	26	16	38%	8	88%	15 min
Flash flood warnings	2	1	50%	0

Each office's whole area, 2021

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Binghamton, NY: tornado warnings	17	0	100%	3	0%
NWS Binghamton, NY: severe thunderstorm warnings	274	159	42%	520	83%	21 min
NWS Binghamton, NY: flash flood warnings	83	50	40%	193	89%	102 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 20, 9:31 AM EST	Special Weather Statement	BGM	44 min
Jan 20, 10:53 AM EST	Special Weather Statement	BGM	37 min
Jan 20, 11:35 AM EST	Special Weather Statement	BGM	55 min
Jan 23, 8:44 AM EST	Special Weather Statement	BGM	61 min
Jan 25, 3:19 PM EST	Winter Weather Advisory	BGM	38 hr
Jan 29, 12:26 AM EST	Special Weather Statement	BGM	49 min
Jan 30, 3:34 PM EST	Winter Storm Watch	BGM	37 hr
Jan 30, 3:34 PM EST	Winter Storm Warning	BGM	4 days
Jan 31, 4:03 AM EST	Winter Weather Advisory	BGM	57 hr
Feb 2, 2:22 AM EST	Special Weather Statement	BGM	53 min
Feb 2, 6:34 AM EST	Special Weather Statement	BGM	56 min
Feb 13, 3:50 PM EST	Winter Storm Watch	BGM	35 hr
Feb 14, 4:15 PM EST	Winter Storm Warning	BGM	36 hr
Feb 15, 2:55 AM EST	Winter Weather Advisory	BGM	30 hr
Feb 16, 3:22 PM EST	Winter Storm Watch	BGM	24 hr
Feb 17, 3:12 PM EST	Winter Weather Advisory	BGM	45 hr
Feb 20, 4:14 PM EST	Special Weather Statement	BGM	46 min
Feb 20, 4:58 PM EST	Special Weather Statement	BGM	47 min
Feb 20, 5:56 PM EST	Snow Squall Warning	BGM	49 min
Feb 22, 7:39 AM EST	Special Weather Statement	BGM	81 min
Feb 22, 8:55 AM EST	Special Weather Statement	BGM	110 min
Feb 28, 3:19 PM EST	Wind Advisory	BGM	43 hr
Mar 25, 3:35 PM EDT	Wind Advisory	BGM	28 hr
Mar 28, 2:59 PM EDT	Special Weather Statement	BGM	61 min
Mar 31, 4:02 AM EDT	Winter Weather Advisory	BGM	30 hr
Apr 28, 1:06 PM EDT	Mesoscale Discussion	SPC	114 min
Apr 29, 3:37 PM EDT	Wind Advisory	BGM	34 hr
Apr 29, 6:58 PM EDT	Areal Flood Advisory	BGM	4 hr
May 10, 2:31 PM EDT	Frost Advisory	BGM	17 hr
May 12, 3:03 AM EDT	Frost Advisory	BGM	29 hr
May 23, 1:20 PM EDT	Mesoscale Discussion	SPC	115 min
May 26, 12:16 PM EDT	Mesoscale Discussion	SPC	119 min
May 26, 12:59 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
May 26, 1:28 PM EDT	Special Weather Statement	BGM	47 min
May 26, 5:32 PM EDT	Special Weather Statement	BGM	28 min
Jun 9, 2:10 PM EDT	Special Weather Statement	BGM	35 min
Jun 13, 8:43 PM EDT	Severe Thunderstorm Warning	BGM	47 min
Jun 13, 10:43 PM EDT	Special Weather Statement	BGM	32 min
Jun 20, 11:49 PM EDT	Special Weather Statement	BGM	26 min
Jun 21, 1:11 PM EDT	Severe Thunderstorm Watch	SPC	10 hr
Jun 21, 4:42 PM EDT	Severe Thunderstorm Warning	BGM	48 min
Jun 21, 5:18 PM EDT	Severe Thunderstorm Warning	BGM	42 min
Jun 26, 3:07 PM EDT	Heat Advisory	BGM	29 hr
Jun 27, 4:14 PM EDT	Heat Advisory	BGM	28 hr
Jun 28, 3:53 PM EDT	Heat Advisory	BGM	28 hr
Jun 29, 2:33 PM EDT	Mesoscale Discussion	SPC	117 min
Jun 29, 3:30 PM EDT	Heat Advisory	BGM	29 hr
Jun 29, 8:06 PM EDT	Areal Flood Advisory	BGM	114 min
Jun 30, 12:25 AM EDT	Severe Thunderstorm Warning	BGM	34 min
Jun 30, 11:04 AM EDT	Mesoscale Discussion	SPC	116 min
Jun 30, 11:47 AM EDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 30, 3:14 PM EDT	Special Weather Statement	BGM	46 min
Jun 30, 3:28 PM EDT	Severe Thunderstorm Warning	BGM	47 min
Jul 1, 10:17 PM EDT	Special Weather Statement	BGM	43 min
Jul 2, 3:13 PM EDT	Mesoscale Discussion	SPC	92 min
Jul 2, 4:37 PM EDT	Special Weather Statement	BGM	23 min
Jul 2, 5:03 PM EDT	Special Weather Statement	BGM	27 min
Jul 6, 12:33 PM EDT	Mesoscale Discussion	SPC	2 hr
Jul 6, 1:13 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 6, 2:11 PM EDT	Severe Thunderstorm Warning	BGM	34 min
Jul 6, 2:14 PM EDT	Severe Thunderstorm Warning	BGM	31 min
Jul 7, 2:41 PM EDT	Severe Thunderstorm Watch	SPC	10 hr
Jul 7, 4:48 PM EDT	Mesoscale Discussion	SPC	87 min
Jul 7, 5:55 PM EDT	Special Weather Statement	BGM	35 min
Jul 7, 6:00 PM EDT	Severe Thunderstorm Warning	BGM	45 min
Jul 7, 6:31 PM EDT	Severe Thunderstorm Warning	BGM	44 min
Jul 7, 7:11 PM EDT	Mesoscale Discussion	SPC	2 hr
Jul 7, 7:14 PM EDT	Special Weather Statement	BGM	31 min
Jul 7, 7:48 PM EDT	Special Weather Statement	BGM	42 min
Jul 7, 8:07 PM EDT	Severe Thunderstorm Warning	BGM	38 min
Jul 7, 8:38 PM EDT	Severe Thunderstorm Warning	BGM	67 min
Jul 7, 8:54 PM EDT	Areal Flood Advisory	BGM	119 min
Jul 9, 2:19 PM EDT	Special Weather Statement	BGM	26 min
Jul 9, 2:47 PM EDT	Special Weather Statement	BGM	43 min
Jul 9, 3:12 PM EDT	Severe Thunderstorm Warning	BGM	33 min
Jul 9, 7:30 PM EDT	Special Weather Statement	BGM	45 min
Jul 11, 3:31 AM EDT	Flash Flood Watch	BGM	30 hr
Jul 11, 7:59 PM EDT	Areal Flood Advisory	BGM	86 min
Jul 12, 10:58 AM EDT	Flash Flood Watch	BGM	15 hr
Jul 12, 5:12 PM EDT	Areal Flood Advisory	BGM	108 min
Jul 12, 7:05 PM EDT	Flash Flood Warning	BGM	3 hr
Jul 13, 12:48 PM EDT	Flash Flood Watch	BGM	11 hr
Jul 13, 12:48 PM EDT	Mesoscale Discussion	SPC	87 min
Jul 13, 1:37 PM EDT	Severe Thunderstorm Watch	SPC	10 hr
Jul 13, 3:28 PM EDT	Severe Thunderstorm Warning	BGM	32 min
Jul 13, 4:07 PM EDT	Mesoscale Discussion	SPC	113 min
Jul 13, 6:44 PM EDT	Mesoscale Discussion	SPC	91 min
Jul 13, 8:27 PM EDT	Severe Thunderstorm Warning	BGM	48 min
Jul 13, 9:10 PM EDT	Severe Thunderstorm Warning	BGM	65 min
Jul 13, 9:12 PM EDT	Mesoscale Discussion	SPC	93 min
Jul 14, 1:44 PM EDT	Special Weather Statement	BGM	31 min
Jul 16, 2:24 PM EDT	Flash Flood Watch	BGM	32 hr
Jul 17, 1:13 PM EDT	Severe Thunderstorm Watch	SPC	10 hr
Jul 17, 4:01 PM EDT	Areal Flood Advisory	BGM	63 min
Jul 17, 4:38 PM EDT	Mesoscale Discussion	SPC	97 min
Jul 17, 5:12 PM EDT	Areal Flood Advisory	BGM	55 min
Jul 17, 6:06 PM EDT	Areal Flood Advisory	BGM	94 min
Jul 18, 2:22 AM EDT	Areal Flood Advisory	BGM	2 hr
Jul 20, 3:05 PM EDT	Severe Thunderstorm Watch	SPC	8 hr
Jul 20, 7:47 PM EDT	Special Weather Statement	BGM	43 min
Jul 20, 7:58 PM EDT	Severe Thunderstorm Warning	BGM	47 min
Jul 20, 8:31 PM EDT	Severe Thunderstorm Warning	BGM	59 min
Jul 20, 10:01 PM EDT	Mesoscale Discussion	SPC	59 min
Jul 20, 10:28 PM EDT	Special Weather Statement	BGM	32 min
Jul 20, 10:54 PM EDT	Flash Flood Warning	BGM	3 hr
Jul 27, 11:12 AM EDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 27, 2:01 PM EDT	Mesoscale Discussion	SPC	89 min
Jul 27, 2:16 PM EDT	Special Weather Statement	BGM	29 min
Jul 27, 2:23 PM EDT	Severe Thunderstorm Warning	BGM	52 min
Jul 29, 8:40 PM EDT	Special Weather Statement	BGM	50 min
Aug 1, 12:27 PM EDT	Mesoscale Discussion	SPC	2 hr
Aug 1, 12:45 PM EDT	Severe Thunderstorm Warning	BGM	45 min
Aug 1, 1:35 PM EDT	Areal Flood Advisory	BGM	85 min
Aug 1, 2:06 PM EDT	Special Weather Statement	BGM	39 min
Aug 9, 3:36 PM EDT	Heat Advisory	BGM	27 hr
Aug 10, 3:14 PM EDT	Heat Advisory	BGM	28 hr
Aug 11, 3:15 AM EDT	Heat Advisory	BGM	40 hr
Aug 13, 2:43 PM EDT	Special Weather Statement	BGM	32 min
Aug 13, 2:45 PM EDT	Severe Thunderstorm Warning	BGM	30 min
Aug 13, 2:48 PM EDT	Mesoscale Discussion	SPC	87 min
Aug 13, 3:09 PM EDT	Severe Thunderstorm Warning	BGM	36 min
Aug 13, 3:24 PM EDT	Severe Thunderstorm Warning	BGM	16 min
Aug 13, 3:29 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 13, 3:51 PM EDT	Severe Thunderstorm Warning	BGM	39 min
Aug 13, 5:24 PM EDT	Severe Thunderstorm Warning	BGM	36 min
Aug 13, 7:14 PM EDT	Mesoscale Discussion	SPC	61 min
Aug 17, 11:52 AM EDT	Flash Flood Watch	BGM	44 hr
Aug 18, 4:06 AM EDT	Areal Flood Advisory	BGM	111 min
Aug 18, 7:00 PM EDT	Areal Flood Advisory	BGM	6 hr
Aug 19, 4:48 AM EDT	River Flood Warning	BGM	11 hr
Aug 19, 9:53 AM EDT	River Flood Warning	BGM	6 hr
Aug 24, 2:27 PM EDT	Heat Advisory	BGM	29 hr
Aug 25, 3:13 PM EDT	Heat Advisory	BGM	28 hr
Sep 12, 10:25 PM EDT	Severe Thunderstorm Watch	SPC	4 hr
Sep 13, 12:26 AM EDT	Mesoscale Discussion	SPC	94 min
Sep 13, 12:45 AM EDT	Severe Thunderstorm Warning Considerable damage threat	BGM	60 min
Sep 13, 1:26 AM EDT	Severe Thunderstorm Warning	BGM	53 min
Sep 15, 10:33 AM EDT	Mesoscale Discussion	SPC	2 hr
Sep 15, 11:55 AM EDT	Severe Thunderstorm Watch	SPC	8 hr
Sep 22, 3:05 PM EDT	Flash Flood Watch	BGM	37 hr
Sep 23, 8:58 AM EDT	Areal Flood Advisory	BGM	5 hr
Sep 23, 10:44 AM EDT	Areal Flood Advisory	BGM	3 hr
Sep 28, 7:58 AM EDT	Special Weather Statement	BGM	47 min
Oct 29, 2:55 PM EDT	Flash Flood Watch	BGM	11 hr
Oct 29, 7:17 PM EDT	Areal Flood Advisory	BGM	4 hr
Oct 29, 8:09 PM EDT	Areal Flood Advisory	BGM	4 hr
Oct 29, 9:28 PM EDT	Areal Flood Advisory	BGM	4 hr
Oct 30, 3:43 AM EDT	River Flood Warning	BGM	29 hr
Oct 30, 3:45 AM EDT	River Flood Warning	BGM	23 hr
Nov 12, 7:44 AM EST	Areal Flood Advisory	BGM	3 hr
Nov 28, 5:29 PM EST	Special Weather Statement	BGM	3 hr
Dec 2, 5:07 PM EST	Special Weather Statement	BGM	23 min
Dec 2, 5:45 PM EST	Special Weather Statement	BGM	45 min
Dec 5, 3:38 AM EST	Wind Advisory	BGM	45 hr
Dec 10, 10:12 AM EST	Wind Advisory	BGM	39 hr
Dec 17, 3:05 PM EST	Winter Weather Advisory	BGM	31 hr
Dec 18, 10:52 AM EST	Mesoscale Discussion	SPC	3 hr
Dec 26, 4:56 PM EST	Winter Weather Advisory	BGM	38 hr
Dec 28, 2:17 PM EST	Winter Weather Advisory	BGM	17 hr
Dec 30, 9:35 PM EST	Dense Fog Advisory	BGM	10 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	26
Severe Thunderstorm Watch	12
Mesoscale Discussion	22
Special Weather Statement	38
Flooding
Flash Flood Warning	2
River Flood Warning	4
Flash Flood Watch	7
Areal Flood Advisory	18
Winter
Snow Squall Warning	1
Winter Storm Warning	2
Winter Storm Watch	3
Winter Weather Advisory	8
Heat
Heat Advisory	9
Cold
Frost Advisory	2
Wind and dust
Wind Advisory	5
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 2020 2022

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.