Alert archive / New York / Herkimer County

Weather alerts in Herkimer County, New York, 2021

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

Herkimer County and its neighbors

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

Alerts: 157
Warnings: 35
Watches: 19
Advisories: 49
Busiest month: July32 alerts
Busiest day: June 21, 202113 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 1 tornado warnings covering Herkimer County in 2021 had a tornado report inside them.

Herkimer County, 2021

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	1	0	100%	0
Severe thunderstorm warnings	21	17	19%	33	79%	17 min
Flash flood warnings	0			0

Each office's whole area, 2021

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Albany, NY: tornado warnings	4	1	75%	4	25%	2 min
NWS Albany, NY: severe thunderstorm warnings	187	147	21%	486	83%	20 min
NWS Albany, NY: flash flood warnings	38	24	37%	108	86%	92 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, 6:59 AM EST	Winter Weather Advisory	ALY	3 hr
Jan 14, 3:37 PM EST	Winter Storm Watch	ALY	24 hr
Jan 15, 3:44 PM EST	Winter Storm Warning	ALY	44 hr
Jan 18, 3:00 PM EST	Winter Weather Advisory	ALY	21 hr
Jan 19, 11:36 AM EST	Lake Effect Snow Warning	ALY	17 hr
Jan 21, 3:36 AM EST	Winter Weather Advisory	ALY	13 hr
Jan 21, 4:09 PM EST	Lake Effect Snow Warning	ALY	21 hr
Jan 23, 3:24 AM EST	Wind Chill Advisory	ALY	30 hr
Jan 25, 3:26 PM EST	Winter Weather Advisory	ALY	43 hr
Jan 28, 3:38 AM EST	Wind Chill Advisory	ALY	32 hr
Jan 28, 8:48 AM EST	Wind Chill Warning	ALY	27 hr
Jan 29, 12:47 PM EST	Wind Chill Advisory	ALY	21 hr
Jan 30, 3:34 PM EST	Winter Storm Watch	ALY	36 hr
Jan 31, 4:11 PM EST	Winter Storm Warning	ALY	50 hr
Jan 31, 4:11 PM EST	Winter Weather Advisory	ALY	53 hr
Feb 11, 3:21 AM EST	Wind Chill Advisory	ALY	30 hr
Feb 13, 3:40 PM EST	Winter Storm Watch	ALY	37 hr
Feb 14, 3:46 PM EST	Winter Storm Warning	ALY	42 hr
Feb 15, 8:06 PM EST	Mesoscale Discussion	SPC	5 hr
Feb 21, 4:09 PM EST	Winter Weather Advisory	ALY	26 hr
Feb 27, 3:34 AM EST	Winter Weather Advisory	ALY	10 hr
Feb 28, 3:11 PM EST	Wind Advisory	ALY	46 hr
Mar 1, 2:58 AM EST	High Wind Warning	ALY	25 hr
Mar 1, 3:11 AM EST	Wind Chill Advisory	ALY	31 hr
Mar 1, 8:32 PM EST	Special Weather Statement	ALY	43 min
Mar 1, 9:42 PM EST	Special Weather Statement	ALY	33 min
Mar 12, 3:27 AM EST	Wind Advisory	ALY	27 hr
Mar 13, 3:46 PM EST	Wind Advisory	ALY	29 hr
Mar 14, 3:25 AM EDT	Wind Chill Advisory	ALY	31 hr
Mar 25, 3:36 PM EDT	Wind Advisory	ALY	32 hr
Mar 26, 10:13 AM EDT	Mesoscale Discussion	SPC	2 hr
Mar 26, 11:11 AM EDT	Severe Thunderstorm Watch	SPC	5 hr
Mar 26, 11:29 AM EDT	Severe Thunderstorm Warning	ALY	46 min
Mar 26, 12:16 PM EDT	Severe Thunderstorm Warning	ALY	44 min
Mar 28, 3:56 AM EDT	Wind Advisory	ALY	35 hr
Mar 28, 3:24 PM EDT	High Wind Warning	ALY	18 hr
Mar 28, 4:17 PM EDT	Special Weather Statement	ALY	43 min
Mar 28, 5:04 PM EDT	Special Weather Statement	ALY	26 min
Mar 30, 3:46 PM EDT	Winter Storm Watch	ALY	12 hr
Mar 31, 3:51 AM EDT	Winter Storm Warning	ALY	24 hr
Mar 31, 3:51 AM EDT	Winter Weather Advisory	ALY	30 hr
Apr 15, 4:03 AM EDT	Winter Weather Advisory	ALY	40 hr
Apr 20, 9:54 PM EDT	Winter Weather Advisory	ALY	18 hr
Apr 29, 3:35 PM EDT	Wind Advisory	ALY	34 hr
Apr 30, 3:45 AM EDT	High Wind Warning	ALY	11 hr
May 10, 3:37 PM EDT	Frost Advisory	ALY	16 hr
May 12, 3:27 AM EDT	Frost Advisory	ALY	29 hr
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, 1:50 PM EDT	Severe Thunderstorm Warning	ALY	55 min
May 26, 2:32 PM EDT	Severe Thunderstorm Warning	ALY	43 min
May 27, 3:27 AM EDT	Frost Advisory	ALY	27 hr
Jun 3, 4:53 PM EDT	Special Weather Statement	ALY	52 min
Jun 14, 1:12 AM EDT	Special Weather Statement	ALY	63 min
Jun 14, 1:32 AM EDT	Special Weather Statement	ALY	58 min
Jun 14, 2:48 AM EDT	Areal Flood Advisory	ALY	5 hr
Jun 14, 2:18 PM EDT	Severe Thunderstorm Warning	ALY	57 min
Jun 14, 2:53 PM EDT	Severe Thunderstorm Warning	ALY	52 min
Jun 14, 3:17 PM EDT	Special Weather Statement	ALY	43 min
Jun 21, 8:12 AM EDT	Special Weather Statement	ALY	33 min
Jun 21, 12:31 PM EDT	Mesoscale Discussion	SPC	89 min
Jun 21, 1:11 PM EDT	Severe Thunderstorm Watch	SPC	10 hr
Jun 21, 2:21 PM EDT	Special Weather Statement	ALY	39 min
Jun 21, 2:33 PM EDT	Severe Thunderstorm Warning	ALY	42 min
Jun 21, 2:56 PM EDT	Special Weather Statement	ALY	49 min
Jun 21, 3:16 PM EDT	Areal Flood Advisory	ALY	91 min
Jun 21, 3:35 PM EDT	Mesoscale Discussion	SPC	85 min
Jun 21, 3:36 PM EDT	Special Weather Statement	ALY	39 min
Jun 21, 6:18 PM EDT	Severe Thunderstorm Warning	ALY	57 min
Jun 21, 6:28 PM EDT	Severe Thunderstorm Warning	ALY	62 min
Jun 21, 6:46 PM EDT	Tornado Warning	ALY	29 min
Jun 21, 6:50 PM EDT	Mesoscale Discussion	SPC	55 min
Jun 27, 2:54 PM EDT	Heat Advisory	ALY	29 hr
Jun 28, 2:19 PM EDT	Heat Advisory	ALY	30 hr
Jun 28, 3:37 PM EDT	Special Weather Statement	ALY	38 min
Jun 28, 4:11 PM EDT	Special Weather Statement	ALY	49 min
Jun 28, 6:45 PM EDT	Special Weather Statement	ALY	45 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, 12:50 PM EDT	Special Weather Statement	ALY	25 min
Jun 30, 1:22 PM EDT	Severe Thunderstorm Warning	ALY	38 min
Jun 30, 1:41 PM EDT	Severe Thunderstorm Warning	ALY	49 min
Jul 1, 2:56 PM EDT	Special Weather Statement	ALY	34 min
Jul 2, 2:33 PM EDT	Areal Flood Advisory	ALY	39 min
Jul 3, 5:23 PM EDT	Areal Flood Advisory	ALY	3 hr
Jul 5, 9:10 PM EDT	Special Weather Statement	ALY	35 min
Jul 5, 10:36 PM EDT	Special Weather Statement	ALY	39 min
Jul 6, 1:49 PM EDT	Severe Thunderstorm Warning	ALY	26 min
Jul 7, 11:20 PM EDT	Severe Thunderstorm Warning	ALY	55 min
Jul 8, 7:39 PM EDT	Special Weather Statement	ALY	51 min
Jul 8, 7:46 PM EDT	Special Weather Statement	ALY	44 min
Jul 8, 8:31 PM EDT	Special Weather Statement	ALY	44 min
Jul 11, 3:52 AM EDT	Flash Flood Watch	ALY	45 hr
Jul 12, 3:37 AM EDT	Areal Flood Advisory	ALY	3 hr
Jul 13, 5:02 AM EDT	Areal Flood Advisory	ALY	3 hr
Jul 13, 1:37 PM EDT	Severe Thunderstorm Watch	SPC	10 hr
Jul 13, 4:07 PM EDT	Mesoscale Discussion	SPC	113 min
Jul 13, 10:59 PM EDT	Special Weather Statement	ALY	46 min
Jul 13, 11:47 PM EDT	Special Weather Statement	ALY	43 min
Jul 16, 3:16 PM EDT	Flash Flood Watch	ALY	55 hr
Jul 18, 5:29 AM EDT	Areal Flood Advisory	ALY	96 min
Jul 20, 3:05 PM EDT	Severe Thunderstorm Watch	SPC	8 hr
Jul 20, 4:17 PM EDT	Mesoscale Discussion	SPC	118 min
Jul 20, 6:46 PM EDT	Special Weather Statement	ALY	44 min
Jul 20, 6:52 PM EDT	Severe Thunderstorm Warning	ALY	38 min
Jul 20, 7:02 PM EDT	Severe Thunderstorm Warning	ALY	58 min
Jul 20, 7:12 PM EDT	Mesoscale Discussion	SPC	2 hr
Jul 20, 7:34 PM EDT	Areal Flood Advisory	ALY	3 hr
Jul 20, 7:41 PM EDT	Severe Thunderstorm Warning	ALY	49 min
Jul 27, 2:47 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 27, 3:20 PM EDT	Severe Thunderstorm Warning	ALY	23 min
Jul 29, 6:55 PM EDT	Areal Flood Advisory	ALY	115 min
Jul 30, 3:49 AM EDT	Special Weather Statement	ALY	41 min
Jul 30, 4:35 AM EDT	Special Weather Statement	ALY	40 min
Aug 1, 3:18 AM EDT	Flash Flood Watch	ALY	19 hr
Aug 10, 3:30 AM EDT	Heat Advisory	ALY	41 hr
Aug 11, 12:09 AM EDT	Special Weather Statement	ALY	66 min
Aug 11, 4:00 PM EDT	Heat Advisory	ALY	28 hr
Aug 11, 6:13 PM EDT	Special Weather Statement	ALY	47 min
Aug 11, 9:02 PM EDT	Special Weather Statement	ALY	43 min
Aug 12, 11:03 AM EDT	Mesoscale Discussion	SPC	2 hr
Aug 12, 1:42 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
Aug 12, 4:00 PM EDT	Heat Advisory	ALY	28 hr
Aug 13, 2:36 PM EDT	Severe Thunderstorm Warning	ALY	39 min
Aug 13, 2:48 PM EDT	Mesoscale Discussion	SPC	87 min
Aug 13, 3:10 PM EDT	Severe Thunderstorm Warning	ALY	48 min
Aug 13, 3:29 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 13, 5:42 PM EDT	Areal Flood Advisory	ALY	3 hr
Aug 13, 7:14 PM EDT	Mesoscale Discussion	SPC	61 min
Aug 14, 3:30 AM EDT	Special Weather Statement	ALY	75 min
Aug 18, 3:33 AM EDT	Flash Flood Watch	ALY	32 hr
Aug 18, 5:14 AM EDT	Areal Flood Advisory	ALY	3 hr
Aug 18, 8:14 AM EDT	Areal Flood Advisory	ALY	2 hr
Aug 20, 3:39 AM EDT	River Flood Warning	ALY	30 hr
Aug 25, 3:14 PM EDT	Heat Advisory	ALY	29 hr
Sep 6, 7:34 AM EDT	Mesoscale Discussion	SPC	2 hr
Sep 6, 10:47 AM EDT	Mesoscale Discussion	SPC	118 min
Sep 6, 11:15 AM EDT	Severe Thunderstorm Warning	ALY	45 min
Sep 15, 7:02 AM EDT	Special Weather Statement	ALY	58 min
Sep 15, 11:55 AM EDT	Severe Thunderstorm Watch	SPC	8 hr
Sep 18, 2:02 PM EDT	Special Weather Statement	ALY	43 min
Oct 5, 6:42 AM EDT	River Flood Warning	ALY	2 hr
Oct 16, 12:35 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
Oct 16, 12:46 PM EDT	Special Weather Statement	ALY	44 min
Oct 16, 1:08 PM EDT	Severe Thunderstorm Warning	ALY	52 min
Nov 12, 8:11 AM EST	Special Weather Statement	ALY	49 min
Nov 12, 9:03 AM EST	Special Weather Statement	ALY	42 min
Nov 25, 3:32 PM EST	Winter Weather Advisory	ALY	36 hr
Dec 6, 4:00 AM EST	Wind Advisory	ALY	21 hr
Dec 6, 4:49 PM EST	Special Weather Statement	ALY	41 min
Dec 10, 3:09 PM EST	Wind Advisory	ALY	36 hr
Dec 11, 4:33 PM EST	High Wind Warning	ALY	11 hr
Dec 11, 6:34 PM EST	Special Weather Statement	ALY	26 min
Dec 17, 3:35 AM EST	Winter Weather Advisory	ALY	50 hr
Dec 24, 3:33 AM EST	Winter Weather Advisory	ALY	44 hr
Dec 25, 5:44 PM EST	Mesoscale Discussion	SPC	4 hr
Dec 27, 3:21 AM EST	Winter Weather Advisory	ALY	28 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	21
Tornado Warning	1
Severe Thunderstorm Watch	11
Mesoscale Discussion	16
Special Weather Statement	38
Flooding
River Flood Warning	2
Flash Flood Watch	4
Areal Flood Advisory	12
Winter
Lake Effect Snow Warning	2
Winter Storm Warning	4
Winter Storm Watch	4
Winter Weather Advisory	14
Heat
Heat Advisory	6
Cold
Wind Chill Warning	1
Frost Advisory	3
Wind Chill Advisory	6
Wind and dust
High Wind Warning	4
Wind Advisory	8

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.