Alert archive / New York / Flash Flood Warnings
Flash Flood Warnings in New York, 2022
37 flash flood warnings in 2022. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of flash flood warnings reaches back to 1986.
Flash Flood Warnings by county
Each county as a circle sized by its count in 2022. Tap one for its archive.
- Flash Flood Warnings
- 37
- Busiest month
- August10 flash flood warnings
- Busiest day
- July 25, 20224 flash flood warnings
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
19 of 36 flash flood warnings covering New York in 2022 had a flash flood report inside them; 32 of 44 flash flood reports fell inside a warning, on average 43 minutes after it went out.
New York, 2022
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Flash flood warnings | 36 | 19 | 47% | 44 | 73% | 43 min |
Each office's whole area, 2022
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Albany, NY: flash flood warnings | 7 | 3 | 57% | 6 | 50% | 19 min |
| NWS New York, NY: flash flood warnings | 29 | 20 | 31% | 61 | 77% | 46 min |
| NWS Buffalo, NY: flash flood warnings | 9 | 5 | 44% | 11 | 100% | 53 min |
| NWS Burlington, VT: flash flood warnings | 6 | 1 | 83% | 8 | 50% | 64 min |
| NWS Binghamton, NY: flash flood warnings | 4 | 1 | 75% | 2 | 100% | 8 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 | Counties | Lasted |
|---|---|---|---|---|
| Feb 18, 9:49 AM EST | Flash Flood Warning | BTV | Clinton, Essex | 3 hr |
| May 15, 4:15 PM EDT | Flash Flood Warning | ALY | Albany | 2 hr |
| May 21, 8:25 PM EDT | Flash Flood Warning | BUF | Chautauqua | 4 hr |
| May 28, 12:33 PM EDT | Flash Flood Warning | OKX | Rockland | 3 hr |
| Jun 2, 3:35 PM EDT | Flash Flood Warning | OKX | Rockland | 115 min |
| Jun 2, 4:34 PM EDT | Flash Flood Warning | OKX | Bronx, New York, Queens, Westchester | 86 min |
| Jul 16, 10:41 AM EDT | Flash Flood Warning | OKX | Nassau, Queens | 109 min |
| Jul 18, 1:03 PM EDT | Flash Flood Warning | OKX | Suffolk | 117 min |
| Jul 18, 3:04 PM EDT | Flash Flood Warning | OKX | Bronx, New York, Westchester | 86 min |
| Jul 18, 4:29 PM EDT | Flash Flood Warning | OKX | Bronx, New York, Westchester | 85 min |
| Jul 21, 2:53 PM EDT | Flash Flood Warning | OKX | Nassau, Suffolk | 61 min |
| Jul 24, 11:38 PM EDT | Flash Flood Warning | BTV | St. Lawrence | 4 hr |
| Jul 25, 12:37 AM EDT | Flash Flood Warning | BTV | Franklin, St. Lawrence | 3 hr |
| Jul 25, 1:20 AM EDT | Flash Flood Warning | BUF | Chautauqua, Erie, Wyoming | 3 hr |
| Jul 25, 12:59 PM EDT | Flash Flood Warning | OKX | Bronx, Kings, Nassau, New York, Queens, Richmond and 1 more | 73 min |
| Aug 4, 4:49 PM EDT | Flash Flood Warning | ALY | Albany | 3 hr |
| Aug 4, 5:38 PM EDT | Flash Flood Warning | ALY | Albany | 89 min |
| Aug 4, 5:39 PM EDT | Flash Flood Warning | ALY | Rensselaer | 111 min |
| Aug 4, 8:56 PM EDT | Flash Flood Warning | OKX | Richmond | 62 min |
| Aug 5, 3:38 PM EDT | Flash Flood Warning | BUF | Ontario | 114 min |
| Aug 9, 7:26 PM EDT | Flash Flood Warning | OKX | Nassau | 66 min |
| Aug 16, 4:08 PM EDT | Flash Flood Warning | BUF | Allegany | 3 hr |
| Aug 20, 6:29 PM EDT | Flash Flood Warning | ALY | Albany, Greene, Schoharie | 3 hr |
| Aug 22, 4:13 PM EDT | Flash Flood Warning | OKX | Richmond | 80 min |
| Aug 23, 12:54 PM EDT | Flash Flood Warning | OKX | Suffolk | 112 min |
| Sep 4, 6:49 PM EDT | Flash Flood Warning | BUF | Allegany, Cattaraugus | 4 hr |
| Sep 5, 2:59 PM EDT | Flash Flood Warning | BUF | Cattaraugus, Chautauqua, Erie | 4 hr |
| Sep 5, 4:37 PM EDT | Flash Flood Warning | BUF | Cattaraugus, Chautauqua | 4 hr |
| Sep 5, 7:08 PM EDT | Flash Flood Warning | BUF | Allegany, Cattaraugus | 3 hr |
| Sep 12, 9:28 PM EDT | Flash Flood Warning | BGM | Steuben | 3 hr |
| Sep 13, 4:29 AM EDT | Flash Flood Warning | OKX | Bronx, Kings, New York, Queens, Richmond | 117 min |
| Sep 13, 5:21 AM EDT | Flash Flood Warning | OKX | Nassau, Queens | 2 hr |
| Sep 19, 3:39 PM EDT | Flash Flood Warning | ALY | Saratoga, Washington | 2 hr |
| Sep 19, 4:13 PM EDT | Flash Flood Warning | ALY | Washington | 112 min |
| Sep 27, 9:20 AM EDT | Flash Flood Warning | BUF | Jefferson, Oswego | 4 hr |
| Dec 23, 5:19 AM EST | Flash Flood Warning | OKX | Rockland | 75 min |
| Dec 25, 1:22 PM EST | Flash Flood Warning | BTV | St. Lawrence | 4 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Bronx County5
- New York County5
- Queens County5
- Nassau County5
- Albany County4
- Chautauqua County4
- Westchester County4
- Richmond County4
- Cattaraugus County4
- Rockland County3
- Suffolk County3
- St. Lawrence County3
- Allegany County3
- Erie County2
- Kings County2
- Washington County2
- Clinton County1
- Essex County1
- Franklin County1
- Wyoming County1
- Rensselaer County1
- Ontario County1
- Greene County1
- Schoharie County1
- Steuben County1
- Saratoga County1
- Jefferson County1
- Oswego County1
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20212023
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.