Weather alerts in New York, 2012
2,831 weather alerts in 2012, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered any part of the state, so the counties below add up to more than the state.
Weather alerts by county
Each county as a circle sized by its count in 2012. Tap one for its archive.
- Alerts
- 2,831
- Warnings
- 891
- Watches
- 166
- Advisories
- 786
- Busiest month
- July546 alerts
- Busiest day
- May 29, 2012148 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
5 of 24 tornado warnings covering New York in 2012 had a tornado report inside them; 11 of 14 tornado reports fell inside a warning, on average 12 minutes after it went out.
New York, 2012
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 24 | 5 | 79% | 14 | 79% | 12 min |
| Severe thunderstorm warnings | 422 | 312 | 26% | 762 | 86% | 26 min |
| Flash flood warnings | 41 | 32 | 22% | 62 | 85% | 54 min |
Each office's whole area, 2012
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Buffalo, NY: severe thunderstorm warnings | 88 | 68 | 23% | 225 | 85% | 25 min |
| NWS Buffalo, NY: flash flood warnings | 8 | 4 | 50% | 10 | 90% | 45 min |
| NWS Burlington, VT: tornado warnings | 4 | 1 | 75% | 1 | 100% | 13 min |
| NWS Burlington, VT: severe thunderstorm warnings | 97 | 79 | 19% | 270 | 86% | 31 min |
| NWS Burlington, VT: flash flood warnings | 5 | 3 | 40% | 13 | 92% | 97 min |
| NWS New York, NY: tornado warnings | 13 | 3 | 77% | 6 | 83% | 13 min |
| NWS New York, NY: severe thunderstorm warnings | 93 | 68 | 27% | 157 | 82% | 28 min |
| NWS New York, NY: flash flood warnings | 35 | 29 | 17% | 89 | 90% | 43 min |
| NWS Albany, NY: tornado warnings | 7 | 0 | 100% | 0 | ||
| NWS Albany, NY: severe thunderstorm warnings | 121 | 80 | 34% | 219 | 87% | 25 min |
| NWS Albany, NY: flash flood warnings | 8 | 6 | 25% | 11 | 73% | 88 min |
| NWS Binghamton, NY: tornado warnings | 13 | 4 | 69% | 11 | 73% | 15 min |
| NWS Binghamton, NY: severe thunderstorm warnings | 138 | 99 | 28% | 264 | 86% | 24 min |
| NWS Binghamton, NY: flash flood warnings | 3 | 1 | 67% | 3 | 100% | 99 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
2,831 alerts are too many to list on one page. Narrow it to a product above, to a month in the chart, or to a county.
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Westchester County255
- Nassau County240
- Queens County235
- Kings County224
- Suffolk County219
- Bronx County194
- New York County185
- Richmond County184
- Orange County182
- Rockland County182
- Putnam County170
- Cayuga County169
- Herkimer County167
- Oneida County167
- Hamilton County156
- Dutchess County152
- Warren County146
- Columbia County143
- Essex County142
- Ulster County139
- Broome County136
- St. Lawrence County135
- Delaware County134
- Otsego County134
- Chautauqua County133
- Fulton County133
- Cattaraugus County132
- Saratoga County131
- Washington County131
- Lewis County128
- Oswego County127
- Chenango County127
- Tioga County127
- Sullivan County125
- Franklin County122
- Onondaga County122
- Cortland County122
- Steuben County121
- Rensselaer County120
- Greene County119
22 more counties
- Chemung County119
- Erie County117
- Madison County117
- Allegany County116
- Clinton County115
- Jefferson County114
- Montgomery County114
- Tompkins County112
- Albany County109
- Livingston County107
- Schuyler County105
- Seneca County105
- Monroe County105
- Wyoming County104
- Schenectady County102
- Yates County97
- Schoharie County97
- Genesee County96
- Ontario County95
- Wayne County87
- Niagara County79
- Orleans County77
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20112013
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.