Alert archive / New York / Ontario County
Weather alerts in Ontario County, New York, 2011
131 weather alerts in 2011, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Ontario County and its neighbors
Each county as a circle sized by its count in 2011. Tap one for its archive.
- Alerts
- 131
- Warnings
- 37
- Watches
- 22
- Advisories
- 30
- Busiest month
- April24 alerts
- Busiest day
- April 27, 201110 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 Ontario County in 2011 had a tornado report inside them.
Ontario County, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 23 | 8 | 65% | 6 | 100% | 26 min |
| Flash flood warnings | 7 | 3 | 57% | 2 | 100% | 25 min |
Each office's whole area, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Buffalo, NY: tornado warnings | 13 | 2 | 85% | 2 | 100% | 9 min |
| NWS Buffalo, NY: severe thunderstorm warnings | 106 | 55 | 48% | 151 | 81% | 23 min |
| NWS Buffalo, NY: flash flood warnings | 23 | 10 | 57% | 23 | 91% | 63 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 10, 3:26 PM EST | Winter Weather Advisory | BUF | 49 hr |
| Jan 12, 12:29 PM EST | Lake Effect Snow Advisory | BUF | 24 hr |
| Jan 18, 3:23 AM EST | Winter Weather Advisory | BUF | 8 hr |
| Jan 23, 10:15 AM EST | Wind Chill Advisory | BUF | 23 hr |
| Jan 31, 4:11 AM EST | Winter Storm Watch | BUF | 12 hr |
| Jan 31, 3:50 PM EST | Winter Storm Warning | BUF | 42 hr |
| Feb 2, 4:12 AM EST | Winter Weather Advisory | BUF | 23 hr |
| Feb 5, 4:07 AM EST | Winter Weather Advisory | BUF | 23 hr |
| Feb 13, 3:45 PM EST | Wind Advisory | BUF | 23 hr |
| Feb 18, 4:37 AM EST | Wind Advisory | BUF | 35 hr |
| Feb 19, 9:55 PM EST | Winter Storm Watch | BUF | 6 hr |
| Feb 20, 4:06 AM EST | Winter Weather Advisory | BUF | 27 hr |
| Feb 20, 11:50 PM EST | Mesoscale Discussion | SPC | 5 hr |
| Feb 23, 3:30 PM EST | Winter Storm Watch | BUF | 22 hr |
| Feb 24, 1:26 PM EST | Winter Storm Warning | BUF | 28 hr |
| Feb 25, 2:46 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 27, 2:47 PM EST | Flood Watch | BUF | 30 hr |
| Mar 3, 3:21 PM EST | Winter Weather Advisory | BUF | 19 hr |
| Mar 4, 3:45 AM EST | Flood Watch | BUF | 47 hr |
| Mar 5, 11:52 AM EST | Winter Storm Watch | BUF | 10 hr |
| Mar 5, 9:28 PM EST | Winter Storm Warning | BUF | 34 hr |
| Mar 9, 11:41 AM EST | Flood Watch | BUF | 46 hr |
| Mar 22, 4:02 PM EDT | Winter Weather Advisory | BUF | 30 hr |
| Mar 23, 3:50 AM EDT | Winter Storm Warning | BUF | 18 hr |
| Apr 3, 3:55 PM EDT | Flood Watch | BUF | 30 hr |
| Apr 15, 3:47 PM EDT | Wind Advisory | BUF | 30 hr |
| Apr 17, 3:36 AM EDT | Wind Advisory | BUF | 14 hr |
| Apr 20, 2:09 AM EDT | Special Weather Statement | BUF | 51 min |
| Apr 20, 4:17 AM EDT | Special Weather Statement | BUF | 58 min |
| Apr 25, 3:54 AM EDT | Flood Watch | BUF | 22 hr |
| Apr 26, 1:18 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Apr 26, 1:49 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Apr 26, 2:00 PM EDT | Severe Thunderstorm Warning | BUF | 45 min |
| Apr 26, 2:26 PM EDT | Severe Thunderstorm Warning | BUF | 49 min |
| Apr 26, 5:40 PM EDT | Severe Thunderstorm Warning | BUF | 50 min |
| Apr 26, 6:19 PM EDT | Areal Flood Advisory | BUF | 2 hr |
| Apr 26, 6:51 PM EDT | Mesoscale Discussion | SPC | 54 min |
| Apr 26, 7:10 PM EDT | Flash Flood Warning | BUF | 3 hr |
| Apr 26, 10:21 PM EDT | Areal Flood Advisory | BUF | 3 hr |
| Apr 27, 1:58 PM EDT | Flash Flood Watch | BUF | 22 hr |
| Apr 27, 1:58 PM EDT | Wind Advisory | BUF | 26 hr |
| Apr 27, 3:10 PM EDT | Tornado Watch | SPC | 7 hr |
| Apr 27, 6:50 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Apr 27, 6:52 PM EDT | Special Weather Statement | BUF | 53 min |
| Apr 27, 6:56 PM EDT | Severe Thunderstorm Warning | BUF | 49 min |
| Apr 27, 7:32 PM EDT | Severe Thunderstorm Warning | BUF | 13 min |
| Apr 27, 7:39 PM EDT | Areal Flood Advisory | BUF | 3 hr |
| Apr 27, 7:42 PM EDT | Severe Thunderstorm Warning | BUF | 48 min |
| May 2, 3:27 PM EDT | Flood Watch | BUF | 36 hr |
| May 13, 5:01 PM EDT | Flash Flood Warning | BUF | 116 min |
| May 13, 6:25 PM EDT | Flash Flood Warning | BUF | 105 min |
| May 15, 4:15 AM EDT | Flood Watch | BUF | 23 hr |
| May 19, 4:18 PM EDT | Special Weather Statement | BUF | 57 min |
| May 19, 4:38 PM EDT | Special Weather Statement | BUF | 52 min |
| May 19, 4:54 PM EDT | Areal Flood Advisory | BUF | 115 min |
| May 23, 2:46 PM EDT | Areal Flood Advisory | BUF | 119 min |
| May 26, 6:06 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 29, 1:02 PM EDT | Mesoscale Discussion | SPC | 58 min |
| May 29, 8:52 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 29, 9:47 PM EDT | Mesoscale Discussion | SPC | 58 min |
| May 29, 10:27 PM EDT | Severe Thunderstorm Warning | BUF | 63 min |
| May 29, 10:41 PM EDT | Severe Thunderstorm Warning | BUF | 50 min |
| May 29, 11:13 PM EDT | Severe Thunderstorm Warning | BUF | 62 min |
| Jun 1, 9:38 AM EDT | Mesoscale Discussion | SPC | 37 min |
| Jun 8, 12:22 AM EDT | Mesoscale Discussion | SPC | 83 min |
| Jun 8, 10:52 PM EDT | Severe Thunderstorm Warning | BUF | 25 min |
| Jun 9, 3:29 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 9, 3:56 AM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 9, 8:13 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 9, 10:36 AM EDT | Mesoscale Discussion | SPC | 84 min |
| Jun 11, 7:09 PM EDT | Severe Thunderstorm Warning | BUF | 51 min |
| Jun 22, 8:23 PM EDT | Severe Thunderstorm Warning | BUF | 37 min |
| Jun 22, 8:41 PM EDT | Tornado Warning | BUF | 19 min |
| Jun 23, 3:48 AM EDT | Special Weather Statement | BUF | 57 min |
| Jun 23, 4:00 AM EDT | Severe Thunderstorm Warning | BUF | 45 min |
| Jun 23, 3:27 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 24, 1:44 PM EDT | Areal Flood Advisory | BUF | 3 hr |
| Jun 28, 1:19 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Jul 6, 4:25 PM EDT | Special Weather Statement | BUF | 35 min |
| Jul 18, 3:58 PM EDT | Mesoscale Discussion | SPC | 92 min |
| Jul 20, 3:35 AM EDT | Excessive Heat Watch | BUF | 12 hr |
| Jul 20, 3:17 PM EDT | Excessive Heat Warning | BUF | 28 hr |
| Jul 25, 11:12 AM EDT | Mesoscale Discussion | SPC | 63 min |
| Jul 25, 11:37 AM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 25, 12:00 PM EDT | Severe Thunderstorm Warning | BUF | 45 min |
| Jul 25, 3:16 PM EDT | Mesoscale Discussion | SPC | 59 min |
| Jul 26, 11:04 AM EDT | Severe Thunderstorm Warning | BUF | 56 min |
| Jul 26, 11:05 AM EDT | Mesoscale Discussion | SPC | 55 min |
| Jul 26, 12:07 PM EDT | Special Weather Statement | BUF | 53 min |
| Aug 1, 3:47 AM EDT | Mesoscale Discussion | SPC | 58 min |
| Aug 1, 8:01 AM EDT | Mesoscale Discussion | SPC | 89 min |
| Aug 1, 2:35 PM EDT | Severe Thunderstorm Warning | BUF | 45 min |
| Aug 1, 3:57 PM EDT | Areal Flood Advisory | BUF | 21 min |
| Aug 1, 4:12 PM EDT | Flash Flood Warning | BUF | 93 min |
| Aug 1, 6:06 PM EDT | Severe Thunderstorm Warning | BUF | 39 min |
| Aug 7, 3:53 PM EDT | Mesoscale Discussion | SPC | 67 min |
| Aug 9, 1:09 PM EDT | Special Weather Statement | BUF | 51 min |
| Aug 9, 1:22 PM EDT | Severe Thunderstorm Warning | BUF | 15 min |
| Aug 13, 8:35 PM EDT | Severe Thunderstorm Warning | BUF | 55 min |
| Aug 13, 9:16 PM EDT | Special Weather Statement | BUF | 59 min |
| Aug 13, 9:56 PM EDT | Flash Flood Warning | BUF | 3 hr |
| Aug 14, 1:54 PM EDT | Flash Flood Warning | BUF | 3 hr |
| Aug 14, 2:40 PM EDT | Flash Flood Warning | BUF | 5 hr |
| Aug 19, 5:55 PM EDT | Special Weather Statement | BUF | 65 min |
| Aug 19, 6:23 PM EDT | Areal Flood Advisory | BUF | 97 min |
| Aug 24, 9:18 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 24, 11:33 PM EDT | Special Weather Statement | BUF | 87 min |
| Aug 24, 11:48 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Aug 25, 2:31 AM EDT | Special Weather Statement | BUF | 59 min |
| Aug 25, 2:31 AM EDT | Mesoscale Discussion | SPC | 119 min |
| Aug 27, 3:26 PM EDT | Wind Advisory | BUF | 29 hr |
| Sep 4, 3:07 AM EDT | Mesoscale Discussion | SPC | 83 min |
| Sep 4, 3:26 AM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Sep 4, 6:22 AM EDT | Mesoscale Discussion | SPC | 83 min |
| Sep 4, 4:53 PM EDT | Special Weather Statement | BUF | 67 min |
| Sep 6, 11:32 AM EDT | Flood Watch | BUF | 42 hr |
| Sep 11, 1:55 PM EDT | Severe Thunderstorm Warning | BUF | 50 min |
| Sep 11, 2:17 PM EDT | Severe Thunderstorm Warning | BUF | 43 min |
| Sep 11, 2:46 PM EDT | Severe Thunderstorm Warning | BUF | 44 min |
| Sep 13, 2:44 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Sep 13, 7:00 PM EDT | Mesoscale Discussion | SPC | 60 min |
| Sep 28, 6:10 PM EDT | Areal Flood Advisory | BUF | 3 hr |
| Oct 5, 3:58 AM EDT | Frost Advisory | BUF | 28 hr |
| Oct 6, 3:25 PM EDT | Frost Advisory | BUF | 16 hr |
| Oct 14, 3:51 PM EDT | Wind Advisory | BUF | 35 hr |
| Oct 27, 3:48 AM EDT | Freeze Warning | BUF | 29 hr |
| Nov 14, 6:03 PM EST | Mesoscale Discussion | SPC | 117 min |
| Nov 14, 6:40 PM EST | Severe Thunderstorm Warning | BUF | 20 min |
| Nov 22, 10:49 PM EST | Freezing Rain Advisory | BUF | 3 hr |
| Dec 6, 3:24 PM EST | Winter Weather Advisory | BUF | 18 hr |
| Dec 27, 4:28 AM EST | Winter Weather Advisory | BUF | 45 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 archive20102012
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.