Alert archive / New York / Cortland County
Weather alerts in Cortland County, New York, 2020
115 weather alerts in 2020, 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 2020. Tap one for its archive.
- Alerts
- 115
- Warnings
- 29
- Watches
- 8
- Advisories
- 24
- Busiest month
- May20 alerts
- Busiest day
- August 27, 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.
Cortland County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 16 | 14 | 13% | 12 | 42% | 28 min |
| Flash flood warnings | 3 | 2 | 33% | 2 | 100% | 172 min |
Each office's whole area, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Binghamton, NY: tornado warnings | 6 | 0 | 100% | 0 | ||
| NWS Binghamton, NY: severe thunderstorm warnings | 136 | 92 | 32% | 361 | 76% | 22 min |
| NWS Binghamton, NY: flash flood warnings | 31 | 17 | 45% | 39 | 82% | 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 8, 3:35 AM EST | Winter Weather Advisory | BGM | 21 hr |
| Jan 8, 6:37 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Jan 8, 3:51 PM EST | Special Weather Statement | BGM | 39 min |
| Jan 8, 4:22 PM EST | Special Weather Statement | BGM | 53 min |
| Jan 8, 4:34 PM EST | Special Weather Statement | BGM | 56 min |
| Jan 10, 8:24 AM EST | Winter Weather Advisory | BGM | 4 hr |
| Jan 11, 1:36 PM EST | Wind Advisory | BGM | 23 hr |
| Jan 15, 2:31 PM EST | Winter Weather Advisory | BGM | 34 hr |
| Jan 17, 3:10 PM EST | Winter Weather Advisory | BGM | 38 hr |
| Jan 24, 3:11 PM EST | Winter Weather Advisory | BGM | 23 hr |
| Feb 5, 3:52 AM EST | Winter Weather Advisory | BGM | 38 hr |
| Feb 5, 3:30 PM EST | Winter Storm Watch | BGM | 24 hr |
| Feb 6, 3:21 PM EST | Winter Storm Warning | BGM | 27 hr |
| Feb 7, 8:39 AM EST | Special Weather Statement | BGM | 81 min |
| Feb 7, 9:58 AM EST | Special Weather Statement | BGM | 2 hr |
| Feb 7, 11:51 AM EST | Special Weather Statement | BGM | 84 min |
| Feb 7, 6:31 PM EST | Winter Storm Warning | BGM | 3 hr |
| Feb 11, 8:37 AM EST | Dense Fog Advisory | BGM | 4 hr |
| Feb 11, 2:47 PM EST | Winter Weather Advisory | BGM | 45 hr |
| Feb 18, 8:21 AM EST | Special Weather Statement | BGM | 84 min |
| Feb 20, 11:43 AM EST | Special Weather Statement | BGM | 47 min |
| Feb 26, 3:25 PM EST | Wind Advisory | BGM | 34 hr |
| Feb 27, 7:43 PM EST | Special Weather Statement | BGM | 62 min |
| Mar 3, 7:12 PM EST | Special Weather Statement | BGM | 48 min |
| Mar 3, 8:01 PM EST | Special Weather Statement | BGM | 59 min |
| Mar 22, 4:14 AM EDT | Winter Weather Advisory | BGM | 42 hr |
| Mar 29, 5:01 PM EDT | Special Weather Statement | BGM | 29 min |
| Apr 12, 2:04 PM EDT | Wind Advisory | BGM | 32 hr |
| Apr 13, 2:42 PM EDT | Mesoscale Discussion | SPC | 93 min |
| Apr 13, 3:05 PM EDT | Severe Thunderstorm Warning | BGM | 55 min |
| Apr 17, 3:34 AM EDT | Winter Weather Advisory | BGM | 30 hr |
| Apr 17, 6:55 PM EDT | Mesoscale Discussion | SPC | 4 hr |
| Apr 29, 3:07 AM EDT | Flood Watch | BGM | 49 hr |
| Apr 30, 6:20 PM EDT | Areal Flood Advisory | BGM | 5 hr |
| May 7, 7:03 PM EDT | Special Weather Statement | BGM | 42 min |
| May 7, 7:46 PM EDT | Special Weather Statement | BGM | 59 min |
| May 9, 3:49 PM EDT | Special Weather Statement | BGM | 41 min |
| May 10, 2:29 PM EDT | Freeze Watch | BGM | 12 hr |
| May 11, 2:48 AM EDT | Freeze Warning | BGM | 30 hr |
| May 11, 10:42 AM EDT | Special Weather Statement | BGM | 48 min |
| May 11, 12:41 PM EDT | Special Weather Statement | BGM | 64 min |
| May 12, 10:08 AM EDT | Freeze Warning | BGM | 23 hr |
| May 13, 10:23 AM EDT | Freeze Warning | BGM | 22 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, 4:03 PM EDT | Special Weather Statement | BGM | 57 min |
| May 15, 4:08 PM EDT | Severe Thunderstorm Warning | BGM | 32 min |
| May 15, 4:17 PM EDT | Severe Thunderstorm Warning | BGM | 36 min |
| May 15, 4:58 PM EDT | Mesoscale Discussion | SPC | 92 min |
| May 29, 10:47 AM EDT | Mesoscale Discussion | SPC | 118 min |
| May 29, 1:54 PM EDT | Special Weather Statement | BGM | 36 min |
| May 29, 6:13 PM EDT | Special Weather Statement | BGM | 62 min |
| May 29, 6:42 PM EDT | Special Weather Statement | BGM | 48 min |
| May 29, 7:39 PM EDT | Special Weather Statement | BGM | 36 min |
| Jun 3, 1:37 AM EDT | Special Weather Statement | BGM | 38 min |
| Jun 19, 5:18 PM EDT | Areal Flood Advisory | BGM | 3 hr |
| Jul 8, 3:37 AM EDT | Heat Advisory | BGM | 40 hr |
| Jul 8, 1:29 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Jul 8, 3:25 PM EDT | Special Weather Statement | BGM | 35 min |
| Jul 10, 10:05 PM EDT | Special Weather Statement | BGM | 40 min |
| Jul 11, 2:06 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Jul 11, 9:08 PM EDT | Special Weather Statement | BGM | 52 min |
| Jul 11, 10:14 PM EDT | Areal Flood Advisory | BGM | 2 hr |
| Jul 16, 7:56 PM EDT | Special Weather Statement | BGM | 64 min |
| Jul 19, 4:39 PM EDT | Special Weather Statement | BGM | 36 min |
| Jul 19, 5:01 PM EDT | Severe Thunderstorm Warning | BGM | 59 min |
| Jul 19, 5:36 PM EDT | Severe Thunderstorm Warning | BGM | 39 min |
| Jul 23, 2:11 PM EDT | Severe Thunderstorm Warning | BGM | 49 min |
| Jul 23, 2:30 PM EDT | Areal Flood Advisory | BGM | 2 hr |
| Jul 26, 2:03 PM EDT | Heat Advisory | BGM | 30 hr |
| Jul 29, 1:37 PM EDT | Severe Thunderstorm Warning | BGM | 53 min |
| Jul 29, 2:32 PM EDT | Special Weather Statement | BGM | 43 min |
| Aug 2, 2:00 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 10, 4:34 PM EDT | Special Weather Statement | BGM | 41 min |
| Aug 11, 6:23 PM EDT | Special Weather Statement | BGM | 37 min |
| Aug 17, 8:31 PM EDT | Special Weather Statement | BGM | 44 min |
| Aug 23, 12:39 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Aug 23, 2:05 PM EDT | Special Weather Statement | BGM | 40 min |
| Aug 25, 4:44 AM EDT | Special Weather Statement | BGM | 46 min |
| Aug 25, 12:02 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Aug 25, 1:08 PM EDT | Severe Thunderstorm Warning | BGM | 52 min |
| Aug 25, 1:21 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 25, 1:49 PM EDT | Severe Thunderstorm Warning | BGM | 41 min |
| Aug 27, 8:37 AM EDT | Severe Thunderstorm Warning | BGM | 53 min |
| Aug 27, 12:38 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 27, 1:03 PM EDT | Severe Thunderstorm Warning | BGM | 42 min |
| Aug 27, 1:22 PM EDT | Tornado Watch | SPC | 7 hr |
| Aug 27, 1:44 PM EDT | Severe Thunderstorm Warning | BGM | 46 min |
| Aug 27, 2:13 PM EDT | Severe Thunderstorm Warning | BGM | 47 min |
| Aug 27, 3:46 PM EDT | Severe Thunderstorm Warning | BGM | 29 min |
| Aug 27, 4:11 PM EDT | Severe Thunderstorm Warning | BGM | 49 min |
| Sep 18, 3:12 AM EDT | Frost Advisory | BGM | 29 hr |
| Oct 6, 2:45 PM EDT | Wind Advisory | BGM | 29 hr |
| Oct 7, 1:28 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 7, 2:13 PM EDT | Severe Thunderstorm Warning | BGM | 47 min |
| Oct 7, 3:00 PM EDT | Special Weather Statement | BGM | 60 min |
| Nov 1, 3:25 AM EST | Winter Weather Advisory | BGM | 31 hr |
| Nov 1, 2:32 PM EST | Special Weather Statement | BGM | 58 min |
| Nov 1, 3:21 PM EST | Special Weather Statement | BGM | 54 min |
| Nov 14, 3:03 PM EST | Wind Advisory | BGM | 31 hr |
| Nov 15, 4:20 PM EST | Mesoscale Discussion | SPC | 85 min |
| Nov 15, 6:27 PM EST | Mesoscale Discussion | SPC | 3 hr |
| Dec 14, 3:42 AM EST | Winter Storm Watch | BGM | 48 hr |
| Dec 15, 3:53 AM EST | Winter Storm Warning | BGM | 54 hr |
| Dec 22, 2:59 PM EST | Flood Watch | BGM | 69 hr |
| Dec 24, 11:30 AM EST | River Flood Warning | BGM | 39 hr |
| Dec 24, 11:30 AM EST | River Flood Warning | BGM | 21 days |
| Dec 24, 8:08 PM EST | Flash Flood Warning | BGM | 3 hr |
| Dec 24, 8:37 PM EST | Flash Flood Warning | BGM | 6 hr |
| Dec 24, 11:57 PM EST | Flash Flood Warning | BGM | 6 hr |
| Dec 25, 6:01 AM EST | Areal Flood Warning | BGM | 6 hr |
| Dec 25, 12:31 PM EST | River Flood Warning | BGM | 32 hr |
| Dec 29, 10:01 AM EST | Special Weather Statement | BGM | 59 min |
| Dec 29, 10:58 AM EST | Special Weather Statement | BGM | 77 min |
| Dec 30, 3:20 AM EST | Winter Weather Advisory | BGM | 27 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 | 16 |
| Severe Thunderstorm Watch | 1 |
| Tornado Watch | 2 |
| Mesoscale Discussion | 15 |
| Special Weather Statement | 39 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flash Flood Warning | 3 |
| River Flood Warning | 3 |
| Flood Watch | 2 |
| Areal Flood Advisory | 4 |
| Winter | |
| Winter Storm Warning | 3 |
| Winter Storm Watch | 2 |
| Winter Weather Advisory | 11 |
| Heat | |
| Heat Advisory | 2 |
| Cold | |
| Freeze Warning | 3 |
| Freeze Watch | 1 |
| Frost Advisory | 1 |
| 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 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.