Alert archive / New York / Flash Flood Warnings
Flash Flood Warnings in New York, 2025
97 flash flood warnings in 2025. 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 2025. Tap one for its archive.
- Flash Flood Warnings
- 97
- Busiest month
- June44 flash flood warnings
- Busiest day
- July 14, 202514 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.
66 of 97 flash flood warnings covering New York in 2025 had a flash flood report inside them; 187 of 201 flash flood reports fell inside a warning, on average 77 minutes after it went out.
New York, 2025
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Flash flood warnings | 97 | 66 | 32% | 201 | 93% | 77 min |
Each office's whole area, 2025
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Burlington, VT: flash flood warnings | 14 | 7 | 50% | 30 | 60% | 88 min |
| NWS Binghamton, NY: flash flood warnings | 72 | 45 | 38% | 124 | 91% | 66 min |
| NWS Albany, NY: flash flood warnings | 10 | 5 | 50% | 16 | 88% | 35 min |
| NWS New York, NY: flash flood warnings | 26 | 23 | 12% | 94 | 96% | 94 min |
| NWS Buffalo, NY: flash flood warnings | 21 | 14 | 33% | 39 | 95% | 64 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 |
|---|---|---|---|---|
| Apr 21, 6:19 PM EDT | Flash Flood Warning | BUF | Cattaraugus, Chautauqua | 3 hr |
| May 4, 5:16 PM EDT | Flash Flood Warning | BGM | Delaware | 5 hr |
| May 5, 7:13 PM EDT | Flash Flood Warning | BGM | Steuben | 6 hr |
| May 5, 8:55 PM EDT | Flash Flood Warning | BUF | Allegany, Cattaraugus, Erie, Genesee, Livingston, Wyoming | 4 hr |
| May 6, 3:44 PM EDT | Flash Flood Warning | BGM | Tioga | 2 hr |
| May 6, 5:02 PM EDT | Flash Flood Warning | ALY | Herkimer | 2 hr |
| May 6, 5:06 PM EDT | Flash Flood Warning | BGM | Cayuga, Onondaga | 3 hr |
| May 6, 5:38 PM EDT | Flash Flood Warning | BUF | Cayuga | 3 hr |
| May 6, 6:38 PM EDT | Flash Flood Warning | BGM | Steuben | 3 hr |
| May 16, 7:09 PM EDT | Flash Flood Warning | BGM | Madison | 64 min |
| May 17, 3:55 PM EDT | Flash Flood Warning | BGM | Oneida | 89 min |
| May 31, 5:43 AM EDT | Flash Flood Warning | BGM | Sullivan | 3 hr |
| Jun 5, 3:23 PM EDT | Flash Flood Warning | BUF | Cattaraugus | 4 hr |
| Jun 5, 10:15 PM EDT | Flash Flood Warning | BGM | Chenango, Otsego | 3 hr |
| Jun 6, 3:28 PM EDT | Flash Flood Warning | ALY | Albany, Schoharie | 3 hr |
| Jun 6, 4:18 PM EDT | Flash Flood Warning | ALY | Saratoga, Schenectady | 2 hr |
| Jun 6, 5:04 PM EDT | Flash Flood Warning | ALY | Albany | 2 hr |
| Jun 6, 5:17 PM EDT | Flash Flood Warning | ALY | Dutchess | 118 min |
| Jun 6, 7:45 PM EDT | Flash Flood Warning | BUF | Allegany, Cattaraugus | 4 hr |
| Jun 7, 4:36 AM EDT | Flash Flood Warning | BGM | Cortland | 3 hr |
| Jun 7, 7:58 AM EDT | Flash Flood Warning | BGM | Chenango, Delaware, Otsego | 3 hr |
| Jun 7, 9:43 AM EDT | Flash Flood Warning | ALY | Albany, Rensselaer | 3 hr |
| Jun 7, 10:08 AM EDT | Flash Flood Warning | BGM | Delaware | 112 min |
| Jun 9, 6:41 PM EDT | Flash Flood Warning | BUF | Allegany | 4 hr |
| Jun 9, 6:44 PM EDT | Flash Flood Warning | BGM | Steuben | 5 hr |
| Jun 9, 7:58 PM EDT | Flash Flood Warning | BGM | Schuyler, Seneca, Yates | 4 hr |
| Jun 9, 8:43 PM EDT | Flash Flood Warning | BGM | Cayuga, Onondaga, Seneca, Tompkins | 3 hr |
| Jun 9, 9:25 PM EDT | Flash Flood Warning | BGM | Schuyler, Steuben | 3 hr |
| Jun 9, 10:05 PM EDT | Flash Flood Warning | BUF | Cayuga, Oswego | 4 hr |
| Jun 10, 12:30 AM EDT | Flash Flood Warning | BGM | Chemung, Schuyler | 56 min |
| Jun 18, 12:23 PM EDT | Flash Flood Warning | BUF | Cattaraugus, Erie | 4 hr |
| Jun 18, 12:41 PM EDT | Flash Flood Warning | BUF | Chautauqua | 4 hr |
| Jun 18, 2:17 PM EDT | Flash Flood Warning | BUF | Livingston, Monroe, Ontario | 4 hr |
| Jun 18, 2:46 PM EDT | Flash Flood Warning | BUF | Allegany, Livingston | 95 min |
| Jun 18, 2:59 PM EDT | Flash Flood Warning | BGM | Steuben | 2 hr |
| Jun 18, 3:09 PM EDT | Flash Flood Warning | BUF | Monroe, Wayne | 4 hr |
| Jun 18, 3:18 PM EDT | Flash Flood Warning | BUF | Ontario | 3 hr |
| Jun 18, 4:48 PM EDT | Flash Flood Warning | BGM | Schuyler, Steuben | 4 hr |
| Jun 18, 5:55 PM EDT | Flash Flood Warning | BGM | Cortland, Tompkins | 3 hr |
| Jun 22, 4:25 AM EDT | Flash Flood Warning | BGM | Oneida | 3 hr |
| Jun 22, 4:41 AM EDT | Flash Flood Warning | BGM | Madison, Oneida | 5 hr |
| Jun 22, 5:07 AM EDT | Flash Flood Warning | BGM | Chenango, Madison, Oneida, Otsego | 5 hr |
| Jun 22, 5:31 AM EDT | Flash Flood Warning | BGM | Oneida | 3 hr |
| Jun 22, 5:57 AM EDT | Flash Flood Warning | BGM | Chenango, Delaware, Otsego | 5 hr |
| Jun 22, 6:18 AM EDT | Flash Flood Warning | BGM | Oneida | 3 hr |
| Jun 22, 7:35 AM EDT | Flash Flood Warning | BGM | Delaware | 3 hr |
| Jun 22, 7:39 AM EDT | Flash Flood Warning | BGM | Chenango, Cortland, Madison, Onondaga | 3 hr |
| Jun 22, 7:46 AM EDT | Flash Flood Warning | BGM | Broome, Chenango, Delaware, Otsego | 3 hr |
| Jun 22, 8:16 AM EDT | Flash Flood Warning | BGM | Broome, Delaware | 3 hr |
| Jun 22, 8:49 AM EDT | Flash Flood Warning | BGM | Chenango | 6 hr |
| Jun 22, 9:12 AM EDT | Flash Flood Warning | BGM | Broome, Tioga | 3 hr |
| Jun 27, 4:08 PM EDT | Flash Flood Warning | BUF | Livingston, Monroe | 3 hr |
| Jun 27, 4:21 PM EDT | Flash Flood Warning | BUF | Livingston, Ontario | 3 hr |
| Jun 27, 5:03 PM EDT | Flash Flood Warning | BUF | Genesee, Wyoming | 3 hr |
| Jun 27, 5:11 PM EDT | Flash Flood Warning | BUF | Cattaraugus, Chautauqua | 2 hr |
| Jun 27, 5:43 PM EDT | Flash Flood Warning | BUF | Erie, Livingston, Wyoming | 114 min |
| Jul 1, 5:20 PM EDT | Flash Flood Warning | BGM | Delaware | 60 min |
| Jul 7, 4:17 PM EDT | Flash Flood Warning | BGM | Cayuga, Onondaga | 62 min |
| Jul 7, 5:29 PM EDT | Flash Flood Warning | OKX | Orange | 35 min |
| Jul 8, 9:15 PM EDT | Flash Flood Warning | OKX | Westchester | 37 min |
| Jul 13, 4:16 PM EDT | Flash Flood Warning | BUF | Cattaraugus | 3 hr |
| Jul 13, 4:30 PM EDT | Flash Flood Warning | BGM | Oneida | 3 hr |
| Jul 13, 6:24 PM EDT | Flash Flood Warning | BGM | Broome, Chemung, Tioga, Tompkins | 5 hr |
| Jul 13, 6:57 PM EDT | Flash Flood Warning | BGM | Broome, Chenango | 4 hr |
| Jul 13, 7:09 PM EDT | Flash Flood Warning | BGM | Steuben | 3 hr |
| Jul 13, 7:50 PM EDT | Flash Flood Warning | BTV | Essex | 3 hr |
| Jul 13, 8:13 PM EDT | Flash Flood Warning | BGM | Broome | 3 hr |
| Jul 13, 8:42 PM EDT | Flash Flood Warning | BGM | Chemung, Schuyler, Steuben, Tompkins | 80 min |
| Jul 13, 10:43 PM EDT | Flash Flood Warning | BGM | Delaware | 5 hr |
| Jul 14, 1:55 PM EDT | Flash Flood Warning | BGM | Tioga, Tompkins | 65 min |
| Jul 14, 3:25 PM EDT | Flash Flood Warning | OKX | Putnam | 3 hr |
| Jul 14, 3:38 PM EDT | Flash Flood Warning | OKX | Rockland, Westchester | 5 hr |
| Jul 14, 4:13 PM EDT | Flash Flood Warning | OKX | Richmond | 4 hr |
| Jul 14, 4:32 PM EDT | Flash Flood Warning | BGM | Delaware, Sullivan | 2 hr |
| Jul 14, 4:51 PM EDT | Flash Flood Warning | OKX | Westchester | 4 hr |
| Jul 14, 4:54 PM EDT | Flash Flood Warning | ALY | Dutchess, Ulster | 3 hr |
| Jul 14, 5:20 PM EDT | Flash Flood Warning | OKX | Rockland, Westchester | 4 hr |
| Jul 14, 5:53 PM EDT | Flash Flood Warning | OKX | Orange, Rockland | 2 hr |
| Jul 14, 6:34 PM EDT | Flash Flood Warning | OKX | Bronx, Kings, New York, Queens, Richmond, Westchester | 3 hr |
| Jul 14, 7:41 PM EDT | Flash Flood Warning | OKX | Bronx, Kings, Nassau, Queens | 2 hr |
| Jul 16, 6:08 PM EDT | Flash Flood Warning | BGM | Steuben | 4 hr |
| Jul 16, 6:33 PM EDT | Flash Flood Warning | BUF | Allegany | 3 hr |
| Jul 16, 6:42 PM EDT | Flash Flood Warning | BGM | Steuben | 3 hr |
| Jul 31, 8:40 AM EDT | Flash Flood Warning | OKX | Orange | 2 hr |
| Jul 31, 9:09 AM EDT | Flash Flood Warning | OKX | Orange | 78 min |
| Jul 31, 2:27 PM EDT | Flash Flood Warning | OKX | Bronx, Nassau, New York, Queens | 3 hr |
| Jul 31, 3:07 PM EDT | Flash Flood Warning | OKX | Kings, New York, Richmond | 3 hr |
| Jul 31, 3:46 PM EDT | Flash Flood Warning | OKX | Nassau | 2 hr |
| Jul 31, 4:33 PM EDT | Flash Flood Warning | OKX | Suffolk | 5 hr |
| Aug 6, 2:17 PM EDT | Flash Flood Warning | BGM | Onondaga | 55 min |
| Aug 6, 8:07 PM EDT | Flash Flood Warning | BUF | Erie | 63 min |
| Aug 13, 7:17 PM EDT | Flash Flood Warning | OKX | Richmond | 46 min |
| Aug 17, 6:14 PM EDT | Flash Flood Warning | OKX | Richmond | 81 min |
| Aug 20, 10:41 PM EDT | Flash Flood Warning | OKX | Westchester | 3 hr |
| Aug 24, 6:22 PM EDT | Flash Flood Warning | BGM | Cayuga, Cortland, Madison, Onondaga, Tompkins | 3 hr |
| Aug 24, 8:24 PM EDT | Flash Flood Warning | BGM | Chemung, Steuben | 3 hr |
| Oct 30, 3:27 PM EDT | Flash Flood Warning | OKX | Bronx, Kings, New York, Queens, Westchester | 2 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Steuben County11
- Delaware County10
- Chenango County8
- Cattaraugus County7
- Oneida County7
- Westchester County7
- Livingston County6
- Cayuga County6
- Onondaga County6
- Tompkins County6
- Broome County6
- Allegany County5
- Madison County5
- Otsego County5
- Schuyler County5
- Richmond County5
- Erie County4
- Tioga County4
- Cortland County4
- Chemung County4
- Orange County4
- Bronx County4
- Kings County4
- New York County4
- Queens County4
- Chautauqua County3
- Wyoming County3
- Albany County3
- Monroe County3
- Ontario County3
- Rockland County3
- Nassau County3
- Genesee County2
- Sullivan County2
- Dutchess County2
- Seneca County2
- Herkimer County1
- Schoharie County1
- Saratoga County1
- Schenectady County1
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20242026
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.