Alert archive / New York / Cortland County
Weather alerts in Cortland County, New York, 2021
174 weather alerts in 2021, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Cortland County and its neighbors
Each county as a circle sized by its count in 2021. Tap one for its archive.
- Alerts
- 174
- Warnings
- 47
- Watches
- 17
- Advisories
- 42
- Busiest month
- July38 alerts
- Busiest day
- June 21, 202112 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 Cortland County in 2021 had a tornado report inside them.
Cortland 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 | 34 | 25 | 26% | 27 | 96% | 19 min |
| Flash flood warnings | 5 | 5 | 0% | 15 | 100% | 66 min |
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 18, 1:06 AM EST | Special Weather Statement | BGM | 3 hr |
| Jan 20, 9:14 AM EST | Special Weather Statement | BGM | 61 min |
| Jan 20, 9:56 AM EST | Special Weather Statement | BGM | 64 min |
| Jan 21, 3:10 AM EST | Winter Weather Advisory | BGM | 55 hr |
| Jan 22, 1:41 PM EST | Special Weather Statement | BGM | 64 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 28, 3:32 AM EST | Wind Chill Advisory | BGM | 32 hr |
| Jan 28, 8:30 AM EST | Winter Weather Advisory | BGM | 25 hr |
| Jan 30, 3:34 PM EST | Winter Storm Watch | BGM | 37 hr |
| Jan 30, 3:34 PM EST | Winter Storm Warning | BGM | 4 days |
| 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 19, 2:43 PM EST | Winter Weather Advisory | BGM | 33 hr |
| Feb 20, 9:36 AM EST | Special Weather Statement | BGM | 54 min |
| Feb 20, 12:57 PM EST | Snow Squall Warning | BGM | 63 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 22, 10:57 AM EST | Special Weather Statement | BGM | 108 min |
| Feb 22, 12:47 PM EST | Special Weather Statement | BGM | 118 min |
| Feb 22, 12:49 PM EST | Special Weather Statement | BGM | 116 min |
| Feb 28, 3:19 PM EST | Wind Advisory | BGM | 43 hr |
| Mar 1, 3:11 PM EST | Special Weather Statement | BGM | 94 min |
| Mar 1, 4:47 PM EST | Special Weather Statement | BGM | 43 min |
| Mar 1, 5:35 PM EST | Special Weather Statement | BGM | 55 min |
| Mar 1, 11:01 PM EST | Special Weather Statement | BGM | 44 min |
| Mar 1, 11:49 PM EST | Special Weather Statement | BGM | 56 min |
| Mar 2, 12:50 AM EST | Special Weather Statement | BGM | 55 min |
| Mar 2, 2:19 AM EST | Special Weather Statement | BGM | 86 min |
| Mar 14, 11:10 AM EDT | Special Weather Statement | BGM | 35 min |
| Mar 25, 3:35 PM EDT | Wind Advisory | BGM | 28 hr |
| Mar 28, 3:49 AM EDT | Wind Advisory | BGM | 29 hr |
| Mar 28, 2:59 PM EDT | Special Weather Statement | BGM | 61 min |
| Mar 28, 3:52 PM EDT | Special Weather Statement | BGM | 53 min |
| Mar 30, 3:04 PM EDT | Winter Storm Watch | BGM | 13 hr |
| Mar 31, 4:02 AM EDT | Winter Weather Advisory | BGM | 30 hr |
| Apr 1, 8:26 PM EDT | Special Weather Statement | BGM | 34 min |
| Apr 1, 9:31 PM EDT | Special Weather Statement | BGM | 29 min |
| Apr 28, 1:06 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Apr 29, 3:37 PM EDT | Wind Advisory | BGM | 34 hr |
| May 4, 9:14 PM EDT | Areal Flood Advisory | BGM | 3 hr |
| May 10, 2:31 PM EDT | Frost Advisory | BGM | 17 hr |
| May 12, 3:03 AM EDT | Frost Advisory | BGM | 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, 1:19 PM EDT | Severe Thunderstorm Warning | BGM | 56 min |
| May 26, 1:28 PM EDT | Special Weather Statement | BGM | 47 min |
| May 26, 2:07 PM EDT | Mesoscale Discussion | SPC | 83 min |
| Jun 3, 4:19 PM EDT | Special Weather Statement | BGM | 26 min |
| Jun 3, 4:48 PM EDT | Special Weather Statement | BGM | 27 min |
| Jun 3, 5:05 PM EDT | Severe Thunderstorm Warning | BGM | 25 min |
| Jun 20, 8:25 PM EDT | Special Weather Statement | BGM | 50 min |
| Jun 21, 1:11 PM EDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Jun 21, 2:00 PM EDT | Special Weather Statement | BGM | 30 min |
| Jun 21, 2:07 PM EDT | Severe Thunderstorm Warning | BGM | 53 min |
| Jun 21, 3:23 PM EDT | Special Weather Statement | BGM | 37 min |
| Jun 21, 3:26 PM EDT | Severe Thunderstorm Warning | BGM | 64 min |
| Jun 21, 4:10 PM EDT | Severe Thunderstorm Warning | BGM | 35 min |
| Jun 21, 5:18 PM EDT | Severe Thunderstorm Warning | BGM | 42 min |
| Jun 21, 5:34 PM EDT | Severe Thunderstorm Warning | BGM | 56 min |
| Jun 21, 5:59 PM EDT | Severe Thunderstorm Warning | BGM | 61 min |
| Jun 21, 6:05 PM EDT | Severe Thunderstorm Warning | BGM | 55 min |
| Jun 21, 6:50 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Jun 27, 4:14 PM EDT | Heat Advisory | BGM | 28 hr |
| Jun 28, 3:53 PM EDT | Heat Advisory | BGM | 28 hr |
| Jun 28, 4:14 PM EDT | Special Weather Statement | BGM | 31 min |
| Jun 29, 2:33 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Jun 29, 6:16 PM EDT | Severe Thunderstorm Warning | BGM | 44 min |
| Jun 29, 6:54 PM EDT | Severe Thunderstorm Warning | BGM | 31 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 2, 3:13 PM EDT | Mesoscale Discussion | SPC | 92 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, 1:19 PM EDT | Severe Thunderstorm Warning | BGM | 26 min |
| Jul 6, 1:42 PM EDT | Severe Thunderstorm Warning | BGM | 33 min |
| Jul 6, 2:00 PM EDT | Severe Thunderstorm Warning | BGM | 45 min |
| Jul 6, 4:45 PM EDT | Severe Thunderstorm Warning | BGM | 30 min |
| Jul 6, 5:11 PM EDT | Severe Thunderstorm Warning | BGM | 34 min |
| Jul 7, 7:55 AM EDT | Severe Thunderstorm Warning | BGM | 36 min |
| Jul 7, 8:27 AM EDT | Special Weather Statement | BGM | 33 min |
| Jul 7, 2:41 PM EDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Jul 8, 8:07 PM EDT | Areal Flood Advisory | BGM | 3 hr |
| Jul 9, 2:17 PM EDT | Severe Thunderstorm Warning | BGM | 43 min |
| Jul 11, 3:31 AM EDT | Flash Flood Watch | BGM | 30 hr |
| Jul 12, 1:41 AM EDT | Areal Flood Advisory | BGM | 3 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, 4:07 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Jul 13, 6:44 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Jul 13, 9:01 PM EDT | Severe Thunderstorm Warning | BGM | 59 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 13, 9:57 PM EDT | Severe Thunderstorm Warning | BGM | 63 min |
| Jul 13, 10:07 PM EDT | Severe Thunderstorm Warning | BGM | 53 min |
| Jul 14, 4:48 PM EDT | Special Weather Statement | BGM | 42 min |
| Jul 16, 2:24 PM EDT | Flash Flood Watch | BGM | 32 hr |
| Jul 17, 4:57 PM EDT | Severe Thunderstorm Warning | BGM | 33 min |
| Jul 17, 5:12 PM EDT | Areal Flood Advisory | BGM | 55 min |
| Jul 17, 5:28 PM EDT | Severe Thunderstorm Warning | BGM | 47 min |
| Jul 17, 6:06 PM EDT | Areal Flood Advisory | BGM | 94 min |
| Jul 20, 3:05 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 20, 6:10 PM EDT | Special Weather Statement | BGM | 35 min |
| Jul 20, 6:54 PM EDT | Special Weather Statement | BGM | 51 min |
| Jul 20, 7:12 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 20, 8:05 PM EDT | Severe Thunderstorm Warning | BGM | 55 min |
| 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, 2:29 PM EDT | Severe Thunderstorm Warning | BGM | 61 min |
| Aug 1, 12:27 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 1, 12:29 PM EDT | Severe Thunderstorm Warning | BGM | 46 min |
| Aug 1, 1:14 PM EDT | Severe Thunderstorm Warning | BGM | 46 min |
| Aug 10, 3:14 PM EDT | Heat Advisory | BGM | 28 hr |
| Aug 11, 3:15 AM EDT | Heat Advisory | BGM | 40 hr |
| Aug 11, 8:55 AM EDT | Special Weather Statement | BGM | 50 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 13, 2:48 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Aug 13, 3:29 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 13, 7:14 PM EDT | Mesoscale Discussion | SPC | 61 min |
| Aug 14, 2:19 AM EDT | Special Weather Statement | BGM | 26 min |
| Aug 17, 11:52 AM EDT | Flash Flood Watch | BGM | 44 hr |
| Aug 17, 7:53 PM EDT | Areal Flood Advisory | BGM | 3 hr |
| Aug 17, 8:59 PM EDT | Flash Flood Warning | BGM | 3 hr |
| Aug 18, 3:27 PM EDT | River Flood Warning | BGM | 63 hr |
| Aug 18, 8:10 PM EDT | Areal Flood Advisory | BGM | 6 hr |
| Aug 19, 12:35 AM EDT | Flash Flood Warning | BGM | 4 hr |
| Aug 21, 3:31 PM EDT | Flash Flood Watch | BGM | 48 hr |
| Aug 22, 9:40 PM EDT | Areal Flood Advisory | BGM | 3 hr |
| Aug 24, 2:27 PM EDT | Heat Advisory | BGM | 29 hr |
| Aug 25, 3:13 PM EDT | Heat Advisory | BGM | 28 hr |
| Aug 27, 4:23 PM EDT | Areal Flood Advisory | BGM | 3 hr |
| Aug 29, 4:19 PM EDT | Severe Thunderstorm Warning | BGM | 28 min |
| Sep 13, 12:26 AM EDT | Mesoscale Discussion | SPC | 94 min |
| Sep 13, 1:26 AM EDT | Severe Thunderstorm Warning | BGM | 53 min |
| Sep 13, 2:01 AM EDT | Special Weather Statement | BGM | 44 min |
| Sep 15, 10:33 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 15, 2:44 PM EDT | Special Weather Statement | BGM | 46 min |
| Sep 23, 11:36 AM EDT | Areal Flood Advisory | BGM | 3 hr |
| Sep 23, 11:45 AM EDT | Areal Flood Advisory | BGM | 3 hr |
| Oct 4, 4:32 PM EDT | Areal Flood Advisory | BGM | 3 hr |
| Oct 4, 4:50 PM EDT | Flash Flood Warning | BGM | 5 hr |
| Oct 4, 5:38 PM EDT | Flash Flood Warning | BGM | 4 hr |
| Oct 15, 4:27 PM EDT | Severe Thunderstorm Warning | BGM | 23 min |
| Oct 16, 6:25 AM EDT | Tornado Warning | BGM | 35 min |
| Oct 16, 9:48 AM EDT | Severe Thunderstorm Warning | BGM | 42 min |
| Oct 16, 11:06 AM EDT | Mesoscale Discussion | SPC | 114 min |
| Oct 16, 11:30 AM EDT | Severe Thunderstorm Warning | BGM | 20 min |
| Oct 16, 12:53 PM EDT | Areal Flood Advisory | BGM | 3 hr |
| Oct 21, 11:15 PM EDT | Special Weather Statement | BGM | 30 min |
| Oct 26, 2:26 PM EDT | Flash Flood Warning | BGM | 6 hr |
| Oct 26, 2:52 PM EDT | River Flood Warning | BGM | 52 hr |
| Oct 26, 8:25 PM EDT | Areal Flood Warning | BGM | 6 hr |
| Oct 29, 11:00 PM EDT | Areal Flood Advisory | BGM | 3 hr |
| Nov 12, 6:04 AM EST | Special Weather Statement | BGM | 41 min |
| Nov 12, 6:45 AM EST | Special Weather Statement | BGM | 60 min |
| Nov 12, 7:57 AM EST | Areal Flood Advisory | BGM | 3 hr |
| Nov 25, 10:06 AM EST | Winter Weather Advisory | BGM | 41 hr |
| Dec 2, 5:45 PM EST | Special Weather Statement | BGM | 45 min |
| Dec 5, 3:38 AM EST | Wind Advisory | BGM | 45 hr |
| Dec 6, 4:09 PM EST | Special Weather Statement | BGM | 51 min |
| Dec 10, 10:12 AM EST | Wind Advisory | BGM | 39 hr |
| Dec 11, 4:07 PM EST | High Wind Warning | BGM | 9 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 22, 11:59 PM EST | Winter Weather Advisory | BGM | 7 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 | 34 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 10 |
| Mesoscale Discussion | 22 |
| Special Weather Statement | 46 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flash Flood Warning | 5 |
| River Flood Warning | 2 |
| Flash Flood Watch | 4 |
| Areal Flood Advisory | 15 |
| Winter | |
| Snow Squall Warning | 1 |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 3 |
| Winter Weather Advisory | 11 |
| Heat | |
| Heat Advisory | 6 |
| Cold | |
| Frost Advisory | 2 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| High Wind Warning | 1 |
| Wind Advisory | 6 |
| Fog and smoke | |
| Dense Fog Advisory | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20202022
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.