Alert archive / New York / Ontario County
Weather alerts in Ontario County, New York, 2017
139 weather alerts in 2017, 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 2017. Tap one for its archive.
- Alerts
- 139
- Warnings
- 47
- Watches
- 16
- Advisories
- 22
- Busiest month
- May33 alerts
- Busiest day
- May 18, 20179 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 2017 had a tornado report inside them.
Ontario County, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 31 | 21 | 32% | 31 | 87% | 20 min |
| Flash flood warnings | 6 | 5 | 17% | 10 | 100% | 90 min |
Each office's whole area, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Buffalo, NY: tornado warnings | 8 | 3 | 63% | 3 | 100% | 9 min |
| NWS Buffalo, NY: severe thunderstorm warnings | 138 | 97 | 30% | 385 | 91% | 24 min |
| NWS Buffalo, NY: flash flood warnings | 11 | 8 | 27% | 36 | 100% | 94 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 3, 3:13 PM EST | Wind Advisory | BUF | 30 hr |
| Jan 8, 9:20 AM EST | Special Weather Statement | BUF | 55 min |
| Jan 9, 2:46 PM EST | Winter Weather Advisory | BUF | 38 hr |
| Jan 9, 3:00 PM EST | Wind Advisory | BUF | 43 hr |
| Jan 10, 6:13 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Jan 16, 3:24 AM EST | Freezing Rain Advisory | BUF | 40 hr |
| Jan 22, 2:20 PM EST | Winter Storm Watch | BUF | 13 hr |
| Jan 23, 3:42 AM EST | Winter Storm Warning | BUF | 24 hr |
| Jan 23, 3:42 AM EST | Winter Weather Advisory | BUF | 39 hr |
| Feb 7, 5:56 AM EST | Freezing Rain Advisory | BUF | 13 hr |
| Feb 11, 4:19 AM EST | Winter Weather Advisory | BUF | 55 hr |
| Feb 28, 2:51 PM EST | Wind Advisory | BUF | 43 hr |
| Mar 3, 11:10 AM EST | Special Weather Statement | BUF | 50 min |
| Mar 7, 9:43 AM EST | High Wind Warning | BUF | 36 hr |
| Mar 7, 9:43 AM EST | Wind Advisory | BUF | 36 hr |
| Mar 11, 2:42 PM EST | Winter Storm Watch | BUF | 37 hr |
| Mar 12, 3:07 PM EDT | Winter Storm Warning | BUF | 3 days |
| Mar 23, 1:22 PM EDT | Winter Weather Advisory | BUF | 23 hr |
| Apr 3, 1:56 PM EDT | Wind Advisory | BUF | 30 hr |
| Apr 3, 2:55 PM EDT | Flood Watch | BUF | 4 days |
| Apr 16, 1:57 PM EDT | Special Weather Statement | BUF | 33 min |
| Apr 16, 2:15 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Apr 20, 8:38 PM EDT | Special Weather Statement | BUF | 67 min |
| Apr 30, 8:20 PM EDT | Special Weather Statement | BUF | 40 min |
| May 1, 6:16 AM EDT | Flood Watch | BUF | 13 hr |
| May 1, 1:41 PM EDT | Mesoscale Discussion | SPC | 64 min |
| May 1, 2:12 PM EDT | Tornado Watch | SPC | 8 hr |
| May 1, 4:36 PM EDT | Mesoscale Discussion | SPC | 84 min |
| May 1, 4:45 PM EDT | Areal Flood Warning | BUF | 3 hr |
| May 1, 4:52 PM EDT | Severe Thunderstorm Warning | BUF | 53 min |
| May 1, 5:46 PM EDT | Severe Thunderstorm Warning | BUF | 59 min |
| May 3, 2:11 PM EDT | Frost Advisory | BUF | 18 hr |
| May 9, 3:49 AM EDT | Frost Advisory | BUF | 28 hr |
| May 14, 3:43 PM EDT | Special Weather Statement | BUF | 32 min |
| May 14, 4:07 PM EDT | Special Weather Statement | BUF | 23 min |
| May 14, 4:27 PM EDT | Special Weather Statement | BUF | 33 min |
| May 14, 4:32 PM EDT | Severe Thunderstorm Warning | BUF | 28 min |
| May 18, 2:04 PM EDT | Mesoscale Discussion | SPC | 116 min |
| May 18, 2:41 PM EDT | Special Weather Statement | BUF | 34 min |
| May 18, 3:22 PM EDT | Severe Thunderstorm Warning | BUF | 38 min |
| May 18, 3:36 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 18, 3:51 PM EDT | Special Weather Statement | BUF | 24 min |
| May 18, 3:57 PM EDT | Severe Thunderstorm Warning | BUF | 48 min |
| May 18, 4:05 PM EDT | Severe Thunderstorm Warning | BUF | 40 min |
| May 18, 4:39 PM EDT | Severe Thunderstorm Warning | BUF | 51 min |
| May 18, 5:36 PM EDT | Mesoscale Discussion | SPC | 84 min |
| May 18, 11:14 PM EDT | Severe Thunderstorm Warning | BUF | 46 min |
| May 18, 11:27 PM EDT | Special Weather Statement | BUF | 33 min |
| May 19, 12:02 AM EDT | Severe Thunderstorm Warning | BUF | 28 min |
| May 30, 12:39 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 30, 1:18 PM EDT | Special Weather Statement | BUF | 27 min |
| May 30, 1:22 PM EDT | Special Weather Statement | BUF | 23 min |
| May 30, 1:41 PM EDT | Severe Thunderstorm Warning | BUF | 49 min |
| May 30, 2:21 PM EDT | Severe Thunderstorm Warning | BUF | 54 min |
| May 30, 3:13 PM EDT | Special Weather Statement | BUF | 32 min |
| May 30, 4:03 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Jun 5, 3:17 PM EDT | Special Weather Statement | BUF | 28 min |
| Jun 15, 11:24 AM EDT | Special Weather Statement | BUF | 66 min |
| Jun 15, 11:41 AM EDT | Flash Flood Watch | BUF | 11 hr |
| Jun 15, 3:46 PM EDT | Special Weather Statement | BUF | 3 hr |
| Jun 15, 4:16 PM EDT | Severe Thunderstorm Warning | BUF | 44 min |
| Jun 15, 4:54 PM EDT | Severe Thunderstorm Warning | BUF | 66 min |
| Jun 15, 5:19 PM EDT | Flash Flood Warning | BUF | 7 hr |
| Jun 15, 5:26 PM EDT | Severe Thunderstorm Warning | BUF | 64 min |
| Jun 15, 7:05 PM EDT | Flash Flood Warning | BUF | 3 hr |
| Jun 16, 5:46 PM EDT | Special Weather Statement | BUF | 29 min |
| Jun 16, 5:54 PM EDT | Severe Thunderstorm Warning | BUF | 30 min |
| Jun 17, 10:50 PM EDT | Flash Flood Watch | BUF | 22 hr |
| Jun 18, 12:31 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Jun 18, 1:37 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 18, 4:30 PM EDT | Mesoscale Discussion | SPC | 90 min |
| Jun 18, 5:19 PM EDT | Severe Thunderstorm Warning | BUF | 56 min |
| Jun 18, 6:11 PM EDT | Severe Thunderstorm Warning | BUF | 49 min |
| Jun 23, 2:02 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 26, 5:59 PM EDT | Severe Thunderstorm Warning | BUF | 45 min |
| Jul 1, 9:10 AM EDT | Special Weather Statement | BUF | 50 min |
| Jul 1, 1:06 PM EDT | Special Weather Statement | BUF | 24 min |
| Jul 12, 1:53 PM EDT | Flash Flood Watch | BUF | 38 hr |
| Jul 13, 12:35 AM EDT | Severe Thunderstorm Warning | BUF | 55 min |
| Jul 13, 9:49 AM EDT | Flash Flood Warning | BUF | 4 hr |
| Jul 13, 10:41 AM EDT | Flash Flood Warning | BUF | 4 hr |
| Jul 13, 1:42 PM EDT | Areal Flood Warning | BUF | 6 hr |
| Jul 13, 2:41 PM EDT | Areal Flood Warning | BUF | 3 hr |
| Jul 14, 12:36 PM EDT | Special Weather Statement | BUF | 24 min |
| Jul 17, 12:20 AM EDT | Special Weather Statement | BUF | 40 min |
| Jul 20, 11:36 AM EDT | Mesoscale Discussion | SPC | 114 min |
| Jul 20, 12:21 PM EDT | Severe Thunderstorm Warning | BUF | 54 min |
| Jul 20, 1:11 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 20, 3:03 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Jul 23, 2:12 PM EDT | Special Weather Statement | BUF | 63 min |
| Jul 23, 2:59 PM EDT | Tornado Warning | BUF | 31 min |
| Jul 23, 3:28 PM EDT | Severe Thunderstorm Warning | BUF | 62 min |
| Jul 23, 3:44 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 23, 3:57 PM EDT | Flash Flood Warning | BUF | 3 hr |
| Jul 23, 4:59 PM EDT | Flash Flood Warning | BUF | 4 hr |
| Jul 23, 6:53 PM EDT | Areal Flood Warning | BUF | 12 hr |
| Jul 24, 8:01 AM EDT | Special Weather Statement | BUF | 59 min |
| Jul 31, 7:31 PM EDT | Special Weather Statement | BUF | 29 min |
| Aug 2, 7:34 PM EDT | Special Weather Statement | BUF | 41 min |
| Aug 4, 1:25 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 4, 3:46 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Aug 4, 7:15 PM EDT | Severe Thunderstorm Warning | BUF | 60 min |
| Aug 4, 7:41 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 12, 1:21 PM EDT | Special Weather Statement | BUF | 24 min |
| Aug 12, 1:41 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 15, 1:38 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 15, 3:36 PM EDT | Special Weather Statement | BUF | 54 min |
| Aug 22, 11:55 AM EDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 22, 12:23 PM EDT | Tornado Watch | SPC | 9 hr |
| Aug 22, 12:34 PM EDT | Severe Thunderstorm Warning | BUF | 56 min |
| Aug 22, 1:23 PM EDT | Severe Thunderstorm Warning | BUF | 67 min |
| Aug 22, 1:56 PM EDT | Severe Thunderstorm Warning | BUF | 49 min |
| Aug 22, 2:44 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 22, 3:45 PM EDT | Severe Thunderstorm Warning | BUF | 45 min |
| Aug 22, 4:29 PM EDT | Severe Thunderstorm Warning | BUF | 19 min |
| Sep 5, 12:24 AM EDT | Severe Thunderstorm Warning | BUF | 21 min |
| Sep 6, 7:43 PM EDT | Special Weather Statement | BUF | 32 min |
| Sep 6, 8:18 PM EDT | Special Weather Statement | BUF | 57 min |
| Oct 15, 3:03 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Oct 15, 4:36 PM EDT | Severe Thunderstorm Warning | BUF | 39 min |
| Oct 15, 5:15 PM EDT | Severe Thunderstorm Warning | BUF | 45 min |
| Oct 15, 5:16 PM EDT | Severe Thunderstorm Warning | BUF | 44 min |
| Oct 16, 3:32 AM EDT | Frost Advisory | BUF | 28 hr |
| Oct 23, 4:35 AM EDT | Wind Advisory | BUF | 27 hr |
| Oct 28, 4:02 AM EDT | Flash Flood Watch | BUF | 48 hr |
| Oct 29, 4:30 AM EDT | Wind Advisory | BUF | 37 hr |
| Oct 29, 10:56 PM EDT | Areal Flood Warning | BUF | 12 hr |
| Nov 4, 2:46 PM EDT | Flood Watch | BUF | 33 hr |
| Nov 5, 8:23 PM EST | Areal Flood Warning | BUF | 24 hr |
| Dec 10, 8:55 PM EST | Mesoscale Discussion | SPC | 5 hr |
| Dec 11, 1:07 PM EST | Winter Weather Advisory | BUF | 45 hr |
| Dec 11, 10:30 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Dec 21, 3:21 AM EST | Winter Weather Advisory | BUF | 63 hr |
| Dec 23, 6:35 PM EST | Winter Weather Advisory | BUF | 54 hr |
| Dec 25, 8:01 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Dec 27, 4:13 AM EST | Wind Chill Advisory | BUF | 47 hr |
| Dec 29, 3:40 AM EST | Winter Weather Advisory | BUF | 48 hr |
| Dec 30, 3:38 AM EST | Wind Chill Advisory | BUF | 54 hr |
| Dec 30, 7:33 PM EST | Special Weather Statement | BUF | 72 min |
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 archive20162018
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.