Alert archive / New York / New York County
Weather alerts in New York County, New York, 2021
179 weather alerts in 2021, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
New York County and its neighbors
Each county as a circle sized by its count in 2021. Tap one for its archive.
- Alerts
- 179
- Warnings
- 38
- Watches
- 28
- Advisories
- 51
- Busiest month
- July56 alerts
- Busiest day
- July 17, 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.
0 of 1 tornado warnings covering New York County in 2021 had a tornado report inside them.
New York 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 | 16 | 13 | 19% | 6 | 100% | 26 min |
| Flash flood warnings | 11 | 11 | 0% | 8 | 100% | 143 min |
Each office's whole area, 2021
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS New York, NY: tornado warnings | 16 | 5 | 69% | 13 | 62% | 8 min |
| NWS New York, NY: severe thunderstorm warnings | 88 | 56 | 36% | 193 | 69% | 24 min |
| NWS New York, NY: flash flood warnings | 50 | 45 | 10% | 249 | 91% | 125 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 25, 3:16 PM EST | Winter Weather Advisory | OKX | 36 hr |
| Jan 29, 6:06 AM EST | Wind Advisory | OKX | 12 hr |
| Jan 30, 3:40 AM EST | Winter Storm Watch | OKX | 36 hr |
| Jan 31, 3:44 AM EST | Winter Storm Warning | OKX | 48 hr |
| Jan 31, 4:01 AM EST | Coastal Flood Advisory | OKX | 37 hr |
| Jan 31, 4:01 AM EST | Coastal Flood Advisory | OKX | 48 hr |
| Feb 1, 7:13 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 1, 1:43 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 1, 7:27 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 2, 6:41 PM EST | Coastal Flood Statement | OKX | 10 hr |
| Feb 5, 3:29 PM EST | Winter Storm Watch | OKX | 13 hr |
| Feb 6, 4:00 AM EST | Winter Storm Warning | OKX | 39 hr |
| Feb 10, 3:30 PM EST | Winter Weather Advisory | OKX | 18 hr |
| Feb 13, 3:18 AM EST | Winter Weather Advisory | OKX | 31 hr |
| Feb 14, 3:32 PM EST | Winter Weather Advisory | OKX | 37 hr |
| Feb 16, 7:19 AM EST | Areal Flood Advisory | OKX | 2 hr |
| Feb 16, 3:42 PM EST | Winter Storm Watch | OKX | 24 hr |
| Feb 17, 3:55 PM EST | Winter Weather Advisory | OKX | 51 hr |
| Feb 18, 9:47 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 28, 3:38 PM EST | Wind Advisory | OKX | 47 hr |
| Mar 12, 4:23 AM EST | Wind Advisory | OKX | 26 hr |
| Mar 13, 3:31 PM EST | Wind Advisory | OKX | 29 hr |
| Mar 25, 3:42 PM EDT | Wind Advisory | OKX | 32 hr |
| Mar 28, 3:54 AM EDT | Wind Advisory | OKX | 34 hr |
| Mar 28, 7:14 PM EDT | Severe Thunderstorm Warning | OKX | 49 min |
| Apr 1, 3:28 AM EDT | Freeze Watch | OKX | 12 hr |
| Apr 1, 3:18 PM EDT | Freeze Watch | OKX | 24 hr |
| Apr 1, 3:18 PM EDT | Freeze Warning | OKX | 19 hr |
| Apr 2, 3:28 PM EDT | Freeze Warning | OKX | 19 hr |
| Apr 11, 2:40 AM EDT | Dense Fog Advisory | OKX | 7 hr |
| Apr 21, 11:49 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 21, 12:28 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Apr 21, 2:05 PM EDT | Special Weather Statement | OKX | 85 min |
| Apr 21, 2:12 PM EDT | Severe Thunderstorm Warning | OKX | 48 min |
| Apr 28, 9:13 PM EDT | Special Weather Statement | OKX | 32 min |
| Apr 29, 3:30 PM EDT | Wind Advisory | OKX | 36 hr |
| May 23, 1:20 PM EDT | Mesoscale Discussion | SPC | 115 min |
| May 26, 2:48 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 26, 4:41 PM EDT | Mesoscale Discussion | SPC | 64 min |
| May 26, 6:34 PM EDT | Mesoscale Discussion | SPC | 116 min |
| May 26, 6:45 PM EDT | Special Weather Statement | OKX | 60 min |
| May 27, 1:25 PM EDT | Coastal Flood Statement | OKX | 38 hr |
| May 28, 11:55 PM EDT | Wind Advisory | OKX | 6 hr |
| May 29, 5:25 AM EDT | Coastal Flood Statement | OKX | 24 hr |
| Jun 4, 3:09 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 4, 3:43 PM EDT | Severe Thunderstorm Warning | OKX | 47 min |
| Jun 4, 3:55 PM EDT | Areal Flood Advisory | OKX | 95 min |
| Jun 4, 4:12 PM EDT | Mesoscale Discussion | SPC | 93 min |
| Jun 7, 3:23 PM EDT | Special Weather Statement | OKX | 52 min |
| Jun 8, 3:29 PM EDT | Severe Thunderstorm Warning | OKX | 46 min |
| Jun 8, 3:49 PM EDT | Flash Flood Warning | OKX | 2 hr |
| Jun 8, 4:15 PM EDT | Severe Thunderstorm Warning | OKX | 43 min |
| Jun 9, 3:19 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Jun 14, 6:18 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Jun 26, 3:45 PM EDT | Heat Advisory | OKX | 4 days |
| Jun 30, 8:41 PM EDT | Special Weather Statement | OKX | 49 min |
| Jun 30, 9:39 PM EDT | Severe Thunderstorm Warning | OKX | 51 min |
| Jun 30, 9:57 PM EDT | Special Weather Statement | OKX | 33 min |
| Jul 1, 10:47 AM EDT | Flash Flood Watch | OKX | 10 hr |
| Jul 2, 1:52 PM EDT | Areal Flood Advisory | OKX | 47 min |
| Jul 2, 3:13 PM EDT | Mesoscale Discussion | SPC | 92 min |
| Jul 2, 8:03 PM EDT | Areal Flood Advisory | OKX | 87 min |
| Jul 5, 4:08 AM EDT | Heat Advisory | OKX | 64 hr |
| Jul 6, 12:33 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 6, 1:32 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 6, 4:23 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Jul 6, 5:25 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Jul 6, 5:53 PM EDT | Severe Thunderstorm Warning | OKX | 37 min |
| Jul 6, 6:28 PM EDT | Severe Thunderstorm Warning | OKX | 47 min |
| Jul 6, 9:11 PM EDT | Special Weather Statement | OKX | 49 min |
| Jul 7, 1:50 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Jul 7, 2:41 PM EDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Jul 7, 4:28 PM EDT | Flash Flood Watch | OKX | 44 hr |
| Jul 7, 4:48 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Jul 8, 1:44 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 8, 2:09 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 8, 3:19 PM EDT | Special Weather Statement | OKX | 41 min |
| Jul 8, 3:53 PM EDT | Flash Flood Warning | OKX | 3 hr |
| Jul 8, 4:36 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Jul 8, 4:37 PM EDT | Special Weather Statement | OKX | 38 min |
| Jul 8, 5:06 PM EDT | Flash Flood Warning | OKX | 3 hr |
| Jul 8, 6:59 PM EDT | Areal Flood Advisory | OKX | 90 min |
| Jul 8, 8:17 PM EDT | Areal Flood Advisory | OKX | 3 hr |
| Jul 8, 10:01 PM EDT | Mesoscale Discussion | SPC | 59 min |
| Jul 9, 3:15 AM EDT | Areal Flood Advisory | OKX | 3 hr |
| Jul 9, 5:30 AM EDT | Areal Flood Advisory | OKX | 3 hr |
| Jul 9, 8:29 AM EDT | Areal Flood Advisory | OKX | 61 min |
| Jul 9, 10:06 PM EDT | Areal Flood Advisory | OKX | 116 min |
| Jul 9, 10:11 PM EDT | Special Weather Statement | OKX | 49 min |
| Jul 10, 8:19 PM EDT | Areal Flood Advisory | OKX | 64 min |
| Jul 10, 8:50 PM EDT | Areal Flood Advisory | OKX | 56 min |
| Jul 10, 8:54 PM EDT | Areal Flood Advisory | OKX | 53 min |
| Jul 11, 4:24 PM EDT | Flash Flood Watch | OKX | 35 hr |
| Jul 12, 2:18 AM EDT | Special Weather Statement | OKX | 42 min |
| Jul 12, 1:32 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Jul 12, 3:34 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 12, 4:18 PM EDT | Areal Flood Advisory | OKX | 52 min |
| Jul 14, 3:20 PM EDT | Heat Advisory | OKX | 3 days |
| Jul 16, 2:43 PM EDT | Flash Flood Watch | OKX | 37 hr |
| Jul 16, 5:51 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Jul 17, 12:00 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 17, 1:13 PM EDT | Special Weather Statement | OKX | 32 min |
| Jul 17, 1:13 PM EDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Jul 17, 2:01 PM EDT | Severe Thunderstorm Warning | OKX | 44 min |
| Jul 17, 2:42 PM EDT | Severe Thunderstorm Warning | OKX | 33 min |
| Jul 17, 3:02 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Jul 17, 3:18 PM EDT | Severe Thunderstorm Warning | OKX | 42 min |
| Jul 17, 4:38 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Jul 17, 6:54 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 21, 10:32 AM EDT | Mesoscale Discussion | SPC | 58 min |
| Jul 21, 11:56 AM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 10, 3:53 AM EDT | Excessive Heat Warning | OKX | 4 days |
| Aug 10, 3:53 AM EDT | Heat Advisory | OKX | 37 hr |
| Aug 10, 3:35 PM EDT | Excessive Heat Warning | OKX | 3 days |
| Aug 10, 6:58 PM EDT | Special Weather Statement | OKX | 47 min |
| Aug 11, 4:45 PM EDT | Excessive Heat Watch | OKX | 23 hr |
| Aug 11, 6:44 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Aug 11, 8:39 PM EDT | Areal Flood Advisory | OKX | 2 hr |
| Aug 11, 9:01 PM EDT | Special Weather Statement | OKX | 29 min |
| Aug 12, 4:39 PM EDT | Special Weather Statement | OKX | 51 min |
| Aug 20, 5:29 AM EDT | Tropical Storm Watch | OKX | 18 hr |
| Aug 20, 5:01 PM EDT | Tropical Storm Warning | OKX | 51 hr |
| Aug 21, 3:02 AM EDT | Flood Watch | OKX | 60 hr |
| Aug 21, 7:36 PM EDT | Areal Flood Advisory | OKX | 84 min |
| Aug 21, 9:03 PM EDT | Areal Flood Advisory | OKX | 87 min |
| Aug 21, 10:18 PM EDT | Flash Flood Warning | OKX | 4 hr |
| Aug 21, 10:37 PM EDT | Areal Flood Advisory | OKX | 83 min |
| Aug 21, 10:47 PM EDT | Flash Flood Warning | OKX | 103 min |
| Aug 22, 2:49 AM EDT | Areal Flood Advisory | OKX | 86 min |
| Aug 22, 2:44 PM EDT | Flash Flood Warning | OKX | 3 hr |
| Aug 22, 4:51 PM EDT | Flash Flood Warning | OKX | 6 hr |
| Aug 22, 11:08 PM EDT | Areal Flood Warning | OKX | 8 hr |
| Aug 23, 3:25 AM EDT | Areal Flood Advisory | OKX | 4 hr |
| Aug 23, 3:16 PM EDT | Heat Advisory | OKX | 4 days |
| Aug 26, 3:35 PM EDT | Flash Flood Watch | OKX | 43 hr |
| Aug 27, 3:31 PM EDT | Special Weather Statement | OKX | 44 min |
| Aug 27, 3:40 PM EDT | Areal Flood Advisory | OKX | 3 hr |
| Aug 27, 4:29 PM EDT | Areal Flood Advisory | OKX | 17 min |
| Aug 27, 4:46 PM EDT | Flash Flood Warning | OKX | 89 min |
| Aug 27, 5:00 PM EDT | Special Weather Statement | OKX | 60 min |
| Aug 30, 3:06 PM EDT | Flash Flood Watch | OKX | 63 hr |
| Sep 1, 4:28 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 1, 6:22 PM EDT | Tornado Watch | SPC | 7 hr |
| Sep 1, 6:34 PM EDT | Mesoscale Discussion | SPC | 56 min |
| Sep 1, 6:51 PM EDT | Flash Flood Warning | OKX | 5 hr |
| Sep 1, 8:32 PM EDT | Severe Thunderstorm Warning | OKX | 43 min |
| Sep 1, 8:32 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Sep 1, 9:03 PM EDT | Severe Thunderstorm Warning | OKX | 42 min |
| Sep 1, 9:06 PM EDT | Tornado Warning | OKX | 24 min |
| Sep 1, 9:25 PM EDT | Severe Thunderstorm Warning | OKX | 65 min |
| Sep 1, 9:28 PM EDT | Flash Flood Warning | OKX | 2 hr |
| Sep 1, 11:20 PM EDT | Mesoscale Discussion | SPC | 85 min |
| Sep 1, 11:54 PM EDT | Flash Flood Warning | OKX | 3 hr |
| Sep 2, 2:53 AM EDT | Areal Flood Warning | OKX | 7 hr |
| Sep 13, 9:59 PM EDT | Special Weather Statement | OKX | 46 min |
| Sep 22, 3:21 PM EDT | Flash Flood Watch | OKX | 35 hr |
| Sep 23, 1:29 PM EDT | Mesoscale Discussion | SPC | 61 min |
| Sep 23, 7:23 PM EDT | Areal Flood Advisory | OKX | 5 hr |
| Oct 8, 4:03 PM EDT | Coastal Flood Statement | OKX | 20 hr |
| Oct 9, 3:56 PM EDT | Coastal Flood Statement | OKX | 25 hr |
| Oct 10, 5:12 PM EDT | Coastal Flood Statement | OKX | 23 hr |
| Oct 16, 5:20 PM EDT | Severe Thunderstorm Warning | OKX | 40 min |
| Oct 24, 2:58 PM EDT | Flash Flood Watch | OKX | 55 hr |
| Oct 26, 3:12 AM EDT | Areal Flood Advisory | OKX | 5 hr |
| Oct 26, 7:54 AM EDT | Areal Flood Advisory | OKX | 4 hr |
| Oct 26, 7:11 PM EDT | Areal Flood Advisory | OKX | 3 hr |
| Oct 29, 3:47 AM EDT | Wind Advisory | OKX | 22 hr |
| Nov 12, 11:08 AM EST | Special Weather Statement | OKX | 82 min |
| Nov 13, 12:07 PM EST | Mesoscale Discussion | SPC | 113 min |
| Nov 13, 12:27 PM EST | Severe Thunderstorm Watch | SPC | 6 hr |
| Nov 13, 1:48 PM EST | Severe Thunderstorm Warning | OKX | 42 min |
| Nov 16, 3:54 AM EST | Frost Advisory | OKX | 28 hr |
| Nov 19, 3:52 AM EST | Frost Advisory | OKX | 29 hr |
| Nov 21, 3:29 PM EST | Freeze Watch | OKX | 12 hr |
| Nov 22, 3:37 AM EST | Freeze Warning | OKX | 29 hr |
| Dec 2, 8:53 PM EST | Special Weather Statement | OKX | 67 min |
| Dec 2, 10:19 PM EST | Special Weather Statement | OKX | 56 min |
| Dec 11, 3:56 AM EST | Wind Advisory | OKX | 24 hr |
| Dec 11, 7:29 PM EST | Mesoscale Discussion | SPC | 3 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 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 10 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 35 |
| Special Weather Statement | 21 |
| Flooding | |
| Areal Flood Warning | 2 |
| Flash Flood Warning | 11 |
| Flash Flood Watch | 8 |
| Flood Watch | 1 |
| Areal Flood Advisory | 26 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 3 |
| Winter Weather Advisory | 5 |
| Heat | |
| Excessive Heat Warning | 2 |
| Excessive Heat Watch | 1 |
| Heat Advisory | 5 |
| Cold | |
| Freeze Warning | 3 |
| Freeze Watch | 3 |
| Frost Advisory | 2 |
| Wind and dust | |
| Wind Advisory | 10 |
| Fog and smoke | |
| Dense Fog Advisory | 1 |
| Tropical | |
| Tropical Storm Warning | 1 |
| Tropical Storm Watch | 1 |
| Coast and beach | |
| Coastal Flood Advisory | 2 |
| Coastal Flood Statement | 6 |
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.