Alert archive / New York / Herkimer County
Weather alerts in Herkimer County, New York, 2020
130 weather alerts in 2020, 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 2020. Tap one for its archive.
- Alerts
- 130
- Warnings
- 29
- Watches
- 15
- Advisories
- 41
- Busiest month
- May19 alerts
- Busiest day
- October 10, 20208 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 Herkimer County in 2020 had a tornado report inside them.
Herkimer County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 2 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 13 | 3 | 77% | 19 | 89% | 23 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Albany, NY: tornado warnings | 20 | 6 | 70% | 17 | 65% | 21 min |
| NWS Albany, NY: severe thunderstorm warnings | 137 | 86 | 37% | 514 | 88% | 24 min |
| NWS Albany, NY: flash flood warnings | 7 | 3 | 57% | 22 | 95% | 43 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 5, 3:12 PM EST | Winter Weather Advisory | ALY | 23 hr |
| Jan 6, 2:25 PM EST | Lake Effect Snow Warning | ALY | 10 hr |
| Jan 8, 6:37 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Jan 8, 7:38 AM EST | Winter Weather Advisory | ALY | 7 hr |
| Jan 8, 9:22 AM EST | Snow Squall Warning | ALY | 68 min |
| Jan 10, 3:25 AM EST | Winter Weather Advisory | ALY | 12 hr |
| Jan 10, 3:33 AM EST | Flood Watch | ALY | 54 hr |
| Jan 11, 1:24 PM EST | Wind Advisory | ALY | 26 hr |
| Jan 12, 7:20 AM EST | Special Weather Statement | ALY | 40 min |
| Jan 15, 3:44 AM EST | Winter Weather Advisory | ALY | 39 hr |
| Jan 15, 2:57 PM EST | Wind Advisory | ALY | 28 hr |
| Jan 15, 3:04 PM EST | Wind Chill Advisory | ALY | 43 hr |
| Jan 17, 3:46 AM EST | Winter Storm Watch | ALY | 11 hr |
| Jan 17, 3:13 PM EST | Winter Storm Warning | ALY | 46 hr |
| Jan 24, 4:20 PM EST | Winter Weather Advisory | ALY | 32 hr |
| Feb 5, 3:24 AM EST | Winter Weather Advisory | ALY | 66 hr |
| Feb 5, 4:18 PM EST | Winter Storm Watch | ALY | 23 hr |
| Feb 6, 3:17 PM EST | Wind Advisory | ALY | 30 hr |
| Feb 6, 3:47 PM EST | Winter Storm Warning | ALY | 30 hr |
| Feb 7, 9:58 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 7, 10:51 AM EST | Special Weather Statement | ALY | 114 min |
| Feb 9, 2:52 PM EST | Winter Weather Advisory | ALY | 21 hr |
| Feb 12, 4:40 AM EST | Winter Weather Advisory | ALY | 32 hr |
| Feb 13, 2:25 PM EST | Wind Chill Advisory | ALY | 19 hr |
| Feb 17, 3:37 AM EST | Winter Weather Advisory | ALY | 36 hr |
| Feb 19, 1:24 PM EST | Winter Weather Advisory | ALY | 22 hr |
| Feb 25, 4:01 AM EST | Winter Storm Watch | ALY | 24 hr |
| Feb 26, 4:23 AM EST | Lake Effect Snow Warning | ALY | 11 hr |
| Feb 26, 4:23 AM EST | Winter Weather Advisory | ALY | 33 hr |
| Feb 26, 3:12 PM EST | Blizzard Warning | ALY | 46 hr |
| Feb 27, 3:35 AM EST | Wind Advisory | ALY | 20 hr |
| Feb 28, 9:37 AM EST | Winter Weather Advisory | ALY | 18 hr |
| Mar 13, 11:02 AM EDT | Special Weather Statement | ALY | 58 min |
| Mar 13, 11:42 AM EDT | Special Weather Statement | ALY | 93 min |
| Mar 20, 4:05 AM EDT | Wind Advisory | ALY | 17 hr |
| Mar 20, 2:32 PM EDT | Severe Thunderstorm Warning | ALY | 58 min |
| Mar 20, 2:43 PM EDT | Severe Thunderstorm Warning | ALY | 62 min |
| Mar 20, 2:47 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Mar 20, 4:18 PM EDT | Severe Thunderstorm Warning | ALY | 42 min |
| Mar 22, 2:14 PM EDT | Winter Weather Advisory | ALY | 35 hr |
| Mar 23, 3:26 PM EDT | Mesoscale Discussion | SPC | 6 hr |
| Apr 9, 3:44 AM EDT | Wind Advisory | ALY | 36 hr |
| Apr 9, 3:47 AM EDT | Winter Weather Advisory | ALY | 35 hr |
| Apr 11, 3:29 PM EDT | High Wind Watch | ALY | 24 hr |
| Apr 12, 3:32 PM EDT | Wind Advisory | ALY | 31 hr |
| Apr 13, 2:42 PM EDT | Mesoscale Discussion | SPC | 93 min |
| Apr 17, 3:53 AM EDT | Winter Weather Advisory | ALY | 30 hr |
| May 9, 3:48 AM EDT | Wind Advisory | ALY | 16 hr |
| May 10, 2:59 PM EDT | Freeze Watch | ALY | 24 hr |
| May 11, 4:10 AM EDT | Freeze Warning | ALY | 29 hr |
| May 11, 1:32 PM EDT | Severe Thunderstorm Warning | ALY | 43 min |
| May 12, 10:20 AM EDT | Freeze Warning | ALY | 22 hr |
| May 13, 12:53 PM EDT | Freeze Warning | ALY | 19 hr |
| May 15, 2:59 PM EDT | Mesoscale Discussion | SPC | 91 min |
| May 15, 3:32 PM EDT | Tornado Watch | SPC | 6 hr |
| May 15, 4:06 PM EDT | Special Weather Statement | ALY | 39 min |
| May 15, 4:26 PM EDT | Severe Thunderstorm Warning | ALY | 64 min |
| May 15, 4:46 PM EDT | Tornado Warning | ALY | 23 min |
| May 15, 4:58 PM EDT | Tornado Warning | ALY | 21 min |
| May 15, 4:58 PM EDT | Mesoscale Discussion | SPC | 92 min |
| May 29, 2:25 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 29, 3:45 PM EDT | Special Weather Statement | ALY | 60 min |
| May 29, 5:26 PM EDT | Special Weather Statement | ALY | 64 min |
| May 29, 5:35 PM EDT | Severe Thunderstorm Warning | ALY | 55 min |
| May 29, 7:38 PM EDT | Special Weather Statement | ALY | 52 min |
| May 29, 8:01 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Jun 11, 3:06 AM EDT | Special Weather Statement | ALY | 54 min |
| Jun 20, 7:18 PM EDT | Special Weather Statement | ALY | 27 min |
| Jun 25, 6:50 PM EDT | Special Weather Statement | ALY | 25 min |
| Jun 28, 6:52 PM EDT | Special Weather Statement | ALY | 38 min |
| Jun 28, 7:32 PM EDT | Special Weather Statement | ALY | 28 min |
| Jul 1, 2:21 PM EDT | Areal Flood Advisory | ALY | 3 hr |
| Jul 8, 4:07 AM EDT | Heat Advisory | ALY | 40 hr |
| Jul 11, 6:30 PM EDT | Special Weather Statement | ALY | 30 min |
| Jul 11, 6:42 PM EDT | Special Weather Statement | ALY | 33 min |
| Jul 12, 1:56 AM EDT | Areal Flood Advisory | ALY | 3 hr |
| Jul 13, 12:45 PM EDT | Special Weather Statement | ALY | 30 min |
| Jul 18, 3:51 AM EDT | Heat Advisory | ALY | 63 hr |
| Jul 19, 6:20 PM EDT | Special Weather Statement | ALY | 55 min |
| Jul 19, 6:49 PM EDT | Severe Thunderstorm Warning | ALY | 30 min |
| Jul 26, 2:59 PM EDT | Heat Advisory | ALY | 29 hr |
| Jul 27, 4:46 PM EDT | Special Weather Statement | ALY | 44 min |
| Jul 28, 5:19 AM EDT | Areal Flood Advisory | ALY | 3 hr |
| Aug 2, 2:00 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 2, 3:10 PM EDT | Tornado Watch | SPC | 7 hr |
| Aug 2, 3:13 PM EDT | Severe Thunderstorm Warning | ALY | 62 min |
| Aug 2, 6:45 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 3, 3:26 AM EDT | Flash Flood Watch | ALY | 42 hr |
| Aug 9, 3:17 PM EDT | Heat Advisory | ALY | 53 hr |
| Aug 10, 3:39 PM EDT | Special Weather Statement | ALY | 51 min |
| Aug 10, 3:49 PM EDT | Special Weather Statement | ALY | 41 min |
| Aug 21, 2:26 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 24, 1:59 PM EDT | Special Weather Statement | ALY | 31 min |
| Aug 29, 1:36 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Aug 29, 2:42 PM EDT | Severe Thunderstorm Warning | ALY | 63 min |
| Aug 29, 2:59 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Sep 2, 9:27 PM EDT | Special Weather Statement | ALY | 48 min |
| Sep 14, 2:58 AM EDT | Freeze Warning | ALY | 30 hr |
| Sep 18, 3:34 AM EDT | Frost Advisory | ALY | 28 hr |
| Sep 18, 3:34 AM EDT | Freeze Warning | ALY | 28 hr |
| Oct 6, 3:18 PM EDT | Wind Advisory | ALY | 31 hr |
| Oct 7, 1:28 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 7, 1:55 PM EDT | Special Weather Statement | ALY | 50 min |
| Oct 7, 2:46 PM EDT | Severe Thunderstorm Warning | ALY | 44 min |
| Oct 10, 1:48 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Oct 10, 2:13 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Oct 10, 4:38 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Oct 10, 5:12 PM EDT | Special Weather Statement | ALY | 48 min |
| Oct 10, 5:27 PM EDT | Special Weather Statement | ALY | 48 min |
| Oct 10, 5:37 PM EDT | Severe Thunderstorm Warning | ALY | 38 min |
| Oct 10, 6:08 PM EDT | Severe Thunderstorm Warning | ALY | 25 min |
| Oct 10, 6:44 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 24, 6:45 AM EDT | Special Weather Statement | ALY | 45 min |
| Nov 1, 3:18 AM EST | Winter Storm Watch | ALY | 25 hr |
| Nov 1, 3:18 AM EST | Winter Weather Advisory | ALY | 51 hr |
| Nov 1, 3:51 PM EST | Special Weather Statement | ALY | 54 min |
| Nov 1, 4:05 PM EST | Wind Advisory | ALY | 27 hr |
| Nov 2, 3:58 AM EST | Lake Effect Snow Warning | ALY | 27 hr |
| Nov 15, 6:27 PM EST | Mesoscale Discussion | SPC | 3 hr |
| Nov 15, 6:45 PM EST | Special Weather Statement | ALY | 60 min |
| Nov 15, 7:09 PM EST | Severe Thunderstorm Warning | ALY | 66 min |
| Dec 9, 3:48 AM EST | Winter Weather Advisory | ALY | 23 hr |
| Dec 15, 3:54 PM EST | Winter Storm Warning | ALY | 45 hr |
| Dec 16, 3:22 AM EST | Winter Weather Advisory | ALY | 32 hr |
| Dec 22, 3:06 PM EST | Flood Watch | ALY | 3 days |
| Dec 24, 11:30 PM EST | Areal Flood Advisory | ALY | 6 hr |
| Dec 25, 9:13 PM EST | Winter Storm Watch | ALY | 6 hr |
| Dec 26, 3:38 AM EST | Lake Effect Snow Warning | ALY | 21 hr |
| Dec 30, 3:24 AM EST | Winter Weather Advisory | ALY | 24 hr |
| Dec 30, 1:20 PM EST | Winter Weather Advisory | ALY | 15 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20192021
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.