Alert archive / New York / Genesee County
Weather alerts in Genesee County, New York, 2009
116 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Genesee County and its neighbors
Each county as a circle sized by its count in 2009. Tap one for its archive.
- Alerts
- 116
- Warnings
- 41
- Watches
- 20
- Advisories
- 31
- Busiest month
- August23 alerts
- Busiest day
- August 10, 20099 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 Genesee County in 2009 had a tornado report inside them; 0 of 1 tornado reports fell inside a warning.
Genesee County, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 1 | 0% | |
| Severe thunderstorm warnings | 21 | 15 | 29% | 6 | 100% | 24 min |
| Flash flood warnings | 2 | 0 | 100% | 0 |
Each office's whole area, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Buffalo, NY: tornado warnings | 7 | 2 | 71% | 5 | 40% | 7 min |
| NWS Buffalo, NY: severe thunderstorm warnings | 109 | 57 | 48% | 134 | 92% | 30 min |
| NWS Buffalo, NY: flash flood warnings | 29 | 12 | 59% | 27 | 89% | 51 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 4, 4:39 PM EST | Freezing Rain Advisory | BUF | 14 hr |
| Jan 6, 3:53 AM EST | Winter Weather Advisory | BUF | 36 hr |
| Jan 7, 12:10 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Jan 10, 3:45 AM EST | Winter Weather Advisory | BUF | 26 hr |
| Jan 10, 7:58 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Jan 12, 3:09 PM EST | Winter Weather Advisory | BUF | 31 hr |
| Jan 15, 4:29 AM EST | Wind Chill Warning | BUF | 11 hr |
| Jan 15, 3:46 PM EST | Wind Chill Advisory | BUF | 43 hr |
| Jan 17, 2:07 PM EST | Winter Weather Advisory | BUF | 32 hr |
| Jan 22, 1:29 AM EST | Winter Weather Advisory | BUF | 8 hr |
| Jan 26, 3:42 PM EST | Winter Storm Watch | BUF | 20 hr |
| Jan 27, 11:48 AM EST | Winter Storm Warning | BUF | 34 hr |
| Feb 8, 6:24 PM EST | Flash Flood Watch | BUF | 4 days |
| Feb 10, 3:12 PM EST | High Wind Watch | BUF | 23 hr |
| Feb 11, 2:34 PM EST | High Wind Warning | BUF | 21 hr |
| Feb 11, 3:27 PM EST | Winter Weather Advisory | BUF | 33 hr |
| Feb 11, 8:19 PM EST | Severe Thunderstorm Watch | SPC | 3 hr |
| Feb 12, 1:23 AM EST | River Flood Warning | BUF | 39 hr |
| Feb 12, 9:03 AM EST | River Flood Warning | BUF | 29 hr |
| Feb 12, 9:03 AM EST | River Flood Warning | BUF | 4 days |
| Feb 12, 11:39 AM EST | Wind Advisory | BUF | 6 hr |
| Feb 12, 2:38 PM EST | River Flood Warning | BUF | 40 hr |
| Feb 12, 2:38 PM EST | River Flood Warning | BUF | 55 hr |
| Feb 20, 7:18 PM EST | Lake Effect Snow Advisory | BUF | 5 hr |
| Feb 22, 4:09 AM EST | Lake Effect Snow Advisory | BUF | 41 hr |
| Mar 7, 11:46 AM EST | Flood Watch | BUF | 44 hr |
| Mar 8, 2:16 PM EDT | River Flood Warning | BUF | 30 hr |
| Mar 8, 5:10 PM EDT | River Flood Warning | BUF | 22 hr |
| Mar 8, 11:16 PM EDT | River Flood Warning | BUF | 60 hr |
| Mar 8, 11:16 PM EDT | River Flood Warning | BUF | 60 hr |
| Mar 9, 2:45 PM EDT | River Flood Warning | BUF | 67 hr |
| Mar 9, 10:28 PM EDT | Flood Watch | BUF | 36 hr |
| Mar 10, 9:36 PM EDT | Wind Advisory | BUF | 24 hr |
| Apr 3, 4:29 AM EDT | Wind Advisory | BUF | 40 hr |
| Apr 5, 4:52 AM EDT | Winter Storm Watch | BUF | 34 hr |
| Apr 6, 3:04 PM EDT | Winter Weather Advisory | BUF | 20 hr |
| Apr 24, 6:51 PM EDT | Mesoscale Discussion | SPC | 54 min |
| Apr 25, 4:54 PM EDT | Mesoscale Discussion | SPC | 66 min |
| May 9, 4:07 AM EDT | Wind Advisory | BUF | 20 hr |
| May 9, 12:43 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 10, 3:53 AM EDT | Frost Advisory | BUF | 28 hr |
| May 11, 9:50 AM EDT | Frost Advisory | BUF | 22 hr |
| May 16, 12:05 PM EDT | Mesoscale Discussion | SPC | 55 min |
| May 17, 4:48 AM EDT | Frost Advisory | BUF | 27 hr |
| May 18, 3:04 PM EDT | Frost Advisory | BUF | 16 hr |
| Jun 25, 12:14 PM EDT | Mesoscale Discussion | SPC | 61 min |
| Jun 25, 12:38 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 25, 1:21 PM EDT | Severe Thunderstorm Warning | BUF | 54 min |
| Jun 25, 2:02 PM EDT | Severe Thunderstorm Warning | BUF | 31 min |
| Jun 25, 2:15 PM EDT | Severe Thunderstorm Warning | BUF | 15 min |
| Jun 25, 6:14 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Jun 26, 12:10 PM EDT | Severe Thunderstorm Warning | BUF | 65 min |
| Jul 2, 10:05 AM EDT | Flash Flood Watch | BUF | 10 hr |
| Jul 11, 10:31 AM EDT | Mesoscale Discussion | SPC | 59 min |
| Jul 11, 10:57 AM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 11, 7:06 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Jul 21, 4:53 PM EDT | Severe Thunderstorm Warning | BUF | 35 min |
| Jul 25, 3:05 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Jul 25, 3:50 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 25, 4:26 PM EDT | Severe Thunderstorm Warning | BUF | 64 min |
| Jul 25, 5:03 PM EDT | Tornado Warning | BUF | 42 min |
| Jul 25, 5:25 PM EDT | Severe Thunderstorm Warning | BUF | 65 min |
| Jul 25, 6:17 PM EDT | Severe Thunderstorm Warning | BUF | 43 min |
| Jul 25, 7:43 PM EDT | Mesoscale Discussion | SPC | 62 min |
| Jul 26, 12:56 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 26, 1:51 PM EDT | Severe Thunderstorm Warning | BUF | 39 min |
| Aug 4, 4:23 PM EDT | Severe Thunderstorm Warning | BUF | 52 min |
| Aug 4, 6:09 PM EDT | Mesoscale Discussion | SPC | 66 min |
| Aug 9, 11:36 AM EDT | Mesoscale Discussion | SPC | 24 min |
| Aug 9, 11:57 AM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 9, 12:07 PM EDT | Severe Thunderstorm Warning | BUF | 53 min |
| Aug 9, 12:51 PM EDT | Severe Thunderstorm Warning | BUF | 54 min |
| Aug 9, 1:35 PM EDT | Severe Thunderstorm Warning | BUF | 55 min |
| Aug 9, 7:11 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 9, 8:47 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Aug 9, 8:58 PM EDT | Severe Thunderstorm Warning | BUF | 92 min |
| Aug 9, 9:28 PM EDT | Severe Thunderstorm Warning | BUF | 77 min |
| Aug 9, 10:08 PM EDT | Severe Thunderstorm Warning | BUF | 67 min |
| Aug 10, 4:25 AM EDT | Flash Flood Watch | BUF | 17 hr |
| Aug 10, 5:15 AM EDT | Flash Flood Warning | BUF | 109 min |
| Aug 10, 6:02 AM EDT | Flash Flood Warning | BUF | 109 min |
| Aug 10, 2:26 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 10, 3:13 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 13, 3:47 AM EDT | Dense Fog Advisory | BUF | 5 hr |
| Aug 18, 2:32 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Aug 20, 6:54 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 20, 8:52 PM EDT | Areal Flood Advisory | BUF | 3 hr |
| Aug 20, 10:04 PM EDT | Severe Thunderstorm Warning | BUF | 56 min |
| Aug 20, 10:40 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Sep 23, 1:18 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Sep 27, 3:43 PM EDT | Wind Advisory | BUF | 30 hr |
| Sep 28, 10:49 AM EDT | Mesoscale Discussion | SPC | 56 min |
| Sep 28, 11:35 AM EDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Sep 28, 12:10 PM EDT | Severe Thunderstorm Warning | BUF | 65 min |
| Sep 28, 1:23 PM EDT | Severe Thunderstorm Warning | BUF | 37 min |
| Sep 28, 1:45 PM EDT | Mesoscale Discussion | SPC | 90 min |
| Sep 28, 2:19 PM EDT | Severe Thunderstorm Warning | BUF | 41 min |
| Sep 28, 6:26 PM EDT | Severe Thunderstorm Warning | BUF | 49 min |
| Sep 28, 7:43 PM EDT | Areal Flood Warning | BUF | 6 hr |
| Oct 6, 3:57 PM EDT | Wind Advisory | BUF | 28 hr |
| Oct 11, 4:09 AM EDT | Frost Advisory | BUF | 29 hr |
| Oct 30, 3:44 PM EDT | Wind Advisory | BUF | 26 hr |
| Nov 30, 12:00 PM EST | Lake Effect Snow Advisory | BUF | 22 hr |
| Dec 3, 4:06 PM EST | Lake Effect Snow Advisory | BUF | 23 hr |
| Dec 8, 4:33 AM EST | High Wind Watch | BUF | 11 hr |
| Dec 8, 3:48 PM EST | High Wind Warning | BUF | 42 hr |
| Dec 8, 4:05 PM EST | Winter Storm Watch | BUF | 24 hr |
| Dec 8, 4:05 PM EST | Winter Weather Advisory | BUF | 20 hr |
| Dec 8, 11:32 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Dec 9, 3:49 PM EST | Lake Effect Snow Warning | BUF | 66 hr |
| Dec 9, 7:27 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Dec 9, 11:43 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Dec 10, 9:44 AM EST | Wind Advisory | BUF | 18 hr |
| Dec 13, 4:02 AM EST | Freezing Rain Advisory | BUF | 11 hr |
| Dec 28, 5:30 AM EST | Lake Effect Snow Warning | BUF | 34 hr |
| Dec 28, 10:11 AM EST | Winter Weather Advisory | BUF | 24 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20082010
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.