Alert archive / New York / Ontario County
Weather alerts in Ontario County, New York, 2018
82 weather alerts in 2018, 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 2018. Tap one for its archive.
- Alerts
- 82
- Warnings
- 18
- Watches
- 13
- Advisories
- 23
- Busiest month
- June12 alerts
- Busiest day
- September 21, 20185 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 2018 had a tornado report inside them.
Ontario County, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 5 | 3 | 40% | 8 | 63% | 38 min |
| Flash flood warnings | 2 | 1 | 50% | 0 |
Each office's whole area, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Buffalo, NY: tornado warnings | 4 | 0 | 100% | 1 | 0% | |
| NWS Buffalo, NY: severe thunderstorm warnings | 71 | 45 | 37% | 135 | 80% | 23 min |
| NWS Buffalo, NY: flash flood warnings | 17 | 9 | 47% | 39 | 87% | 58 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 1, 2:44 PM EST | Winter Weather Advisory | BUF | 34 hr |
| Jan 3, 3:42 AM EST | Wind Chill Watch | BUF | 24 hr |
| Jan 4, 3:38 AM EST | Wind Chill Warning | BUF | 3 days |
| Jan 9, 8:34 PM EST | Flood Watch | BUF | 67 hr |
| Jan 10, 3:03 PM EST | Winter Storm Watch | BUF | 23 hr |
| Jan 11, 2:31 PM EST | Winter Storm Warning | BUF | 45 hr |
| Jan 12, 8:34 AM EST | Areal Flood Warning | BUF | 12 hr |
| Jan 12, 7:04 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Jan 13, 3:47 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Jan 21, 3:46 AM EST | Flood Watch | BUF | 62 hr |
| Jan 29, 3:30 AM EST | Winter Weather Advisory | BUF | 39 hr |
| Feb 5, 2:52 PM EST | Winter Storm Watch | BUF | 24 hr |
| Feb 6, 2:55 PM EST | Winter Storm Warning | BUF | 27 hr |
| Feb 7, 5:28 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Feb 7, 11:25 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 9, 3:35 AM EST | Winter Weather Advisory | BUF | 66 hr |
| Feb 24, 2:58 PM EST | Wind Advisory | BUF | 24 hr |
| Feb 28, 3:53 AM EST | Winter Storm Watch | BUF | 23 hr |
| Mar 1, 3:12 AM EST | Winter Storm Warning | BUF | 42 hr |
| Mar 1, 8:43 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Mar 9, 3:09 PM EST | Special Weather Statement | BUF | 21 min |
| Mar 12, 1:52 PM EDT | Winter Weather Advisory | BUF | 60 hr |
| Mar 16, 5:18 AM EDT | Special Weather Statement | BUF | 57 min |
| Mar 30, 1:47 PM EDT | Wind Advisory | BUF | 39 hr |
| Apr 2, 4:36 AM EDT | High Wind Watch | BUF | 34 hr |
| Apr 3, 4:58 AM EDT | High Wind Warning | BUF | 42 hr |
| Apr 4, 6:36 AM EDT | Special Weather Statement | BUF | 54 min |
| Apr 13, 4:30 AM EDT | Winter Weather Advisory | BUF | 57 hr |
| Apr 13, 3:04 PM EDT | Flood Watch | BUF | 71 hr |
| Apr 14, 4:15 AM EDT | Ice Storm Warning | BUF | 33 hr |
| Apr 14, 7:55 PM EDT | Mesoscale Discussion | SPC | 5 hr |
| May 4, 3:58 AM EDT | Wind Advisory | BUF | 19 hr |
| May 4, 2:23 PM EDT | Mesoscale Discussion | SPC | 97 min |
| May 4, 2:44 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 4, 4:20 PM EDT | Mesoscale Discussion | SPC | 55 min |
| May 16, 4:06 AM EDT | Dense Fog Advisory | BUF | 6 hr |
| Jun 1, 1:24 PM EDT | Severe Thunderstorm Warning | BUF | 51 min |
| Jun 1, 4:55 PM EDT | Special Weather Statement | BUF | 65 min |
| Jun 1, 4:59 PM EDT | Severe Thunderstorm Warning | BUF | 61 min |
| Jun 13, 3:30 PM EDT | Mesoscale Discussion | SPC | 60 min |
| Jun 13, 4:06 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 13, 7:12 PM EDT | Mesoscale Discussion | SPC | 93 min |
| Jun 17, 1:50 PM EDT | Heat Advisory | BUF | 27 hr |
| Jun 18, 12:19 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Jun 18, 1:33 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 29, 3:33 AM EDT | Heat Advisory | BUF | 4 days |
| Jun 29, 2:10 PM EDT | Excessive Heat Warning | BUF | 3 days |
| Jun 29, 2:10 PM EDT | Heat Advisory | BUF | 14 hr |
| Jul 2, 1:03 PM EDT | Mesoscale Discussion | SPC | 72 min |
| Jul 3, 4:36 PM EDT | Heat Advisory | BUF | 27 hr |
| Jul 4, 2:44 PM EDT | Heat Advisory | BUF | 29 hr |
| Jul 5, 6:21 PM EDT | Severe Thunderstorm Warning | BUF | 54 min |
| Jul 15, 1:31 PM EDT | Heat Advisory | BUF | 30 hr |
| Jul 16, 5:14 PM EDT | Severe Thunderstorm Warning | BUF | 61 min |
| Jul 23, 7:06 PM EDT | Special Weather Statement | BUF | 69 min |
| Aug 5, 2:46 PM EDT | Heat Advisory | BUF | 27 hr |
| Aug 6, 3:06 PM EDT | Special Weather Statement | BUF | 24 min |
| Aug 6, 3:12 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 8, 11:03 AM EDT | Special Weather Statement | BUF | 57 min |
| Aug 8, 11:54 AM EDT | Flash Flood Warning | BUF | 3 hr |
| Aug 14, 7:21 AM EDT | Special Weather Statement | BUF | 54 min |
| Aug 14, 9:21 AM EDT | Flash Flood Warning | BUF | 5 hr |
| Aug 15, 3:29 PM EDT | Special Weather Statement | BUF | 46 min |
| Aug 16, 7:11 PM EDT | Special Weather Statement | BUF | 64 min |
| Aug 26, 2:34 PM EDT | Heat Advisory | BUF | 28 hr |
| Aug 27, 3:44 AM EDT | Heat Advisory | BUF | 63 hr |
| Sep 2, 2:30 PM EDT | Heat Advisory | BUF | 27 hr |
| Sep 4, 1:45 PM EDT | Heat Advisory | BUF | 30 hr |
| Sep 21, 4:27 PM EDT | Mesoscale Discussion | SPC | 63 min |
| Sep 21, 4:50 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Sep 21, 6:31 PM EDT | Severe Thunderstorm Warning | BUF | 59 min |
| Sep 21, 7:04 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Sep 21, 7:07 PM EDT | Tornado Warning | BUF | 23 min |
| Oct 2, 4:05 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Oct 13, 4:03 AM EDT | Frost Advisory | BUF | 29 hr |
| Oct 17, 4:07 AM EDT | Freeze Warning | BUF | 28 hr |
| Oct 23, 3:17 PM EDT | Special Weather Statement | BUF | 43 min |
| Nov 14, 2:19 PM EST | Winter Weather Advisory | BUF | 43 hr |
| Nov 15, 3:39 AM EST | Winter Storm Warning | BUF | 30 hr |
| Nov 15, 10:06 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Nov 26, 5:53 PM EST | Winter Weather Advisory | BUF | 48 hr |
| Dec 21, 3:08 AM EST | Flood Watch | BUF | 18 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 archive20172019
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.