Alert archive / New York / Flash Flood Warnings
Flash Flood Warnings in New York, 2010
54 flash flood warnings in 2010. 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 2010. Tap one for its archive.
- Flash Flood Warnings
- 54
- Busiest month
- July20 flash flood warnings
- Busiest day
- January 25, 201013 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.
35 of 54 flash flood warnings covering New York in 2010 had a flash flood report inside them; 97 of 110 flash flood reports fell inside a warning, on average 99 minutes after it went out.
New York, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Flash flood warnings | 54 | 35 | 35% | 110 | 88% | 99 min |
Each office's whole area, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Binghamton, NY: flash flood warnings | 19 | 11 | 42% | 39 | 95% | 114 min |
| NWS Burlington, VT: flash flood warnings | 8 | 0 | 100% | 0 | ||
| NWS Buffalo, NY: flash flood warnings | 14 | 9 | 36% | 16 | 94% | 57 min |
| NWS Albany, NY: flash flood warnings | 15 | 11 | 27% | 47 | 89% | 113 min |
| NWS New York, NY: flash flood warnings | 13 | 10 | 23% | 51 | 51% | 65 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 |
|---|---|---|---|---|
| Jan 25, 6:42 AM EST | Flash Flood Warning | BGM | Steuben | 6 hr |
| Jan 25, 7:45 AM EST | Flash Flood Warning | BGM | Chemung, Steuben | 6 hr |
| Jan 25, 9:03 AM EST | Flash Flood Warning | BGM | Chemung, Schuyler, Steuben, Yates | 4 hr |
| Jan 25, 9:20 AM EST | Flash Flood Warning | BGM | Broome, Chemung, Schuyler, Tioga, Tompkins | 6 hr |
| Jan 25, 9:58 AM EST | Flash Flood Warning | BGM | Broome, Cayuga, Chenango, Cortland, Madison, Oneida and 6 more | 6 hr |
| Jan 25, 10:44 AM EST | Flash Flood Warning | BGM | Delaware, Otsego | 5 hr |
| Jan 25, 10:52 AM EST | Flash Flood Warning | ALY | Herkimer | 6 hr |
| Jan 25, 11:34 AM EST | Flash Flood Warning | ALY | Greene, Schoharie, Ulster | 6 hr |
| Jan 25, 12:13 PM EST | Flash Flood Warning | BGM | Delaware, Sullivan | 4 hr |
| Jan 25, 12:21 PM EST | Flash Flood Warning | ALY | Fulton, Montgomery, Schoharie | 6 hr |
| Jan 25, 12:44 PM EST | Flash Flood Warning | ALY | Dutchess | 6 hr |
| Jan 25, 1:02 PM EST | Flash Flood Warning | ALY | Albany, Columbia, Rensselaer, Saratoga, Schenectady | 6 hr |
| Jan 25, 1:12 PM EST | Flash Flood Warning | ALY | Hamilton, Saratoga, Warren, Washington | 6 hr |
| Jun 12, 11:01 PM EDT | Flash Flood Warning | OKX | Orange | 85 min |
| Jul 8, 6:49 PM EDT | Flash Flood Warning | BGM | Delaware, Sullivan | 3 hr |
| Jul 9, 2:54 AM EDT | Flash Flood Warning | ALY | Fulton, Herkimer, Montgomery | 3 hr |
| Jul 9, 2:25 PM EDT | Flash Flood Warning | BUF | Cattaraugus, Chautauqua | 2 hr |
| Jul 9, 3:25 PM EDT | Flash Flood Warning | BUF | Wayne | 3 hr |
| Jul 9, 3:36 PM EDT | Flash Flood Warning | BUF | Allegany, Wyoming | 2 hr |
| Jul 9, 4:28 PM EDT | Flash Flood Warning | BUF | Ontario, Wayne | 3 hr |
| Jul 10, 1:41 PM EDT | Flash Flood Warning | OKX | Nassau, Suffolk | 2 hr |
| Jul 13, 2:47 PM EDT | Flash Flood Warning | BUF | Monroe | 2 hr |
| Jul 13, 4:11 PM EDT | Flash Flood Warning | BUF | Ontario, Wayne | 3 hr |
| Jul 13, 4:44 PM EDT | Flash Flood Warning | BUF | Livingston | 3 hr |
| Jul 13, 4:53 PM EDT | Flash Flood Warning | BUF | Livingston, Ontario | 3 hr |
| Jul 13, 5:49 PM EDT | Flash Flood Warning | BUF | Ontario | 3 hr |
| Jul 13, 7:34 PM EDT | Flash Flood Warning | BUF | Allegany | 3 hr |
| Jul 17, 6:55 PM EDT | Flash Flood Warning | BGM | Oneida | 3 hr |
| Jul 17, 7:20 PM EDT | Flash Flood Warning | ALY | Fulton, Herkimer | 3 hr |
| Jul 17, 10:20 PM EDT | Flash Flood Warning | ALY | Fulton | 2 hr |
| Jul 19, 4:43 PM EDT | Flash Flood Warning | OKX | Orange, Putnam | 3 hr |
| Jul 23, 9:43 PM EDT | Flash Flood Warning | BUF | Cattaraugus, Chautauqua | 84 min |
| Jul 24, 1:43 AM EDT | Flash Flood Warning | ALY | Fulton, Herkimer, Montgomery | 4 hr |
| Jul 25, 8:54 AM EDT | Flash Flood Warning | BUF | Cattaraugus, Chautauqua | 4 hr |
| Aug 22, 9:27 PM EDT | Flash Flood Warning | OKX | Kings, Nassau, Queens | 2 hr |
| Aug 22, 10:48 PM EDT | Flash Flood Warning | OKX | Nassau, Suffolk | 88 min |
| Sep 30, 6:53 PM EDT | Flash Flood Warning | BGM | Broome, Delaware, Otsego, Sullivan | 6 hr |
| Sep 30, 7:10 PM EDT | Flash Flood Warning | ALY | Herkimer | 3 hr |
| Sep 30, 7:26 PM EDT | Flash Flood Warning | ALY | Hamilton | 4 hr |
| Sep 30, 9:08 PM EDT | Flash Flood Warning | BGM | Broome, Chenango, Cortland, Delaware, Madison, Oneida and 3 more | 4 hr |
| Oct 1, 12:57 AM EDT | Flash Flood Warning | BGM | Broome, Cayuga, Chemung, Chenango, Cortland, Delaware and 8 more | 6 hr |
| Oct 1, 5:42 AM EDT | Flash Flood Warning | OKX | Bronx, Kings, New York, Queens, Richmond | 2 hr |
| Oct 1, 6:35 AM EDT | Flash Flood Warning | OKX | Putnam, Westchester | 3 hr |
| Oct 1, 6:41 AM EDT | Flash Flood Warning | BGM | Delaware, Otsego, Sullivan | 3 hr |
| Oct 1, 8:10 AM EDT | Flash Flood Warning | OKX | Suffolk | 88 min |
| Oct 5, 3:26 PM EDT | Flash Flood Warning | BUF | Allegany, Cattaraugus | 3 hr |
| Oct 11, 8:41 PM EDT | Flash Flood Warning | OKX | Bronx, Kings, Nassau, New York, Queens | 64 min |
| Dec 1, 9:51 AM EST | Flash Flood Warning | BGM | Cayuga, Chemung, Cortland, Madison, Oneida, Onondaga and 4 more | 114 min |
| Dec 1, 10:16 AM EST | Flash Flood Warning | BUF | Lewis, Oswego | 5 hr |
| Dec 1, 10:43 AM EST | Flash Flood Warning | BGM | Broome, Chenango | 86 min |
| Dec 1, 10:58 AM EST | Flash Flood Warning | BGM | Madison, Oneida | 2 hr |
| Dec 1, 11:59 AM EST | Flash Flood Warning | ALY | Fulton, Hamilton, Herkimer, Montgomery | 4 hr |
| Dec 1, 12:20 PM EST | Flash Flood Warning | ALY | Albany, Greene, Schoharie, Ulster | 6 hr |
| Dec 1, 2:30 PM EST | Flash Flood Warning | ALY | Rensselaer, Saratoga, Schenectady, Warren, Washington | 4 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Delaware County7
- Broome County6
- Oneida County6
- Herkimer County6
- Fulton County6
- Chemung County5
- Schuyler County5
- Tioga County5
- Madison County5
- Otsego County5
- Sullivan County5
- Tompkins County4
- Chenango County4
- Cortland County4
- Onondaga County4
- Montgomery County4
- Cattaraugus County4
- Ontario County4
- Nassau County4
- Steuben County3
- Cayuga County3
- Schoharie County3
- Saratoga County3
- Hamilton County3
- Chautauqua County3
- Wayne County3
- Allegany County3
- Suffolk County3
- Kings County3
- Queens County3
- Yates County2
- Seneca County2
- Greene County2
- Ulster County2
- Albany County2
- Rensselaer County2
- Schenectady County2
- Warren County2
- Washington County2
- Orange County2
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20092011
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.