Alert archive / New York / St. Lawrence County
Weather alerts in St. Lawrence County, New York, 2013
126 weather alerts in 2013, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
St. Lawrence County and its neighbors
Each county as a circle sized by its count in 2013. Tap one for its archive.
- Alerts
- 126
- Warnings
- 37
- Watches
- 18
- Advisories
- 25
- Busiest month
- September25 alerts
- Busiest day
- July 18, 20137 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
St. Lawrence County, 2013
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 19 | 16 | 16% | 25 | 88% | 35 min |
| Flash flood warnings | 3 | 0 | 100% | 0 |
Each office's whole area, 2013
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Burlington, VT: severe thunderstorm warnings | 74 | 50 | 32% | 193 | 89% | 32 min |
| NWS Burlington, VT: flash flood warnings | 39 | 18 | 54% | 74 | 88% | 113 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 19, 3:12 PM EST | Wind Advisory | BTV | 27 hr |
| Jan 19, 7:17 PM EST | High Wind Warning | BTV | 20 hr |
| Jan 22, 3:31 AM EST | Wind Chill Warning | BTV | 3 days |
| Jan 22, 3:31 AM EST | Wind Chill Advisory | BTV | 3 days |
| Jan 23, 3:54 PM EST | Flood Watch | BTV | 36 hr |
| Jan 28, 4:04 AM EST | Winter Weather Advisory | BTV | 22 hr |
| Jan 29, 3:36 AM EST | Freezing Rain Advisory | BTV | 27 hr |
| Jan 29, 3:15 PM EST | High Wind Watch | BTV | 13 hr |
| Jan 30, 3:46 AM EST | High Wind Warning | BTV | 39 hr |
| Jan 30, 3:55 AM EST | Flood Watch | BTV | 47 hr |
| Feb 1, 7:00 PM EST | Lake Effect Snow Advisory | BTV | 8 hr |
| Feb 2, 3:10 AM EST | Lake Effect Snow Warning | BTV | 18 hr |
| Feb 2, 3:10 AM EST | Lake Effect Snow Advisory | BTV | 18 hr |
| Feb 6, 2:44 PM EST | Winter Storm Watch | BTV | 25 hr |
| Feb 7, 3:33 PM EST | Winter Storm Warning | BTV | 39 hr |
| Feb 17, 3:18 PM EST | Wind Chill Advisory | BTV | 15 hr |
| Feb 26, 12:14 PM EST | Winter Weather Advisory | BTV | 41 hr |
| Mar 17, 4:13 PM EDT | Winter Storm Watch | BTV | 11 hr |
| Mar 18, 3:42 AM EDT | Winter Storm Warning | BTV | 48 hr |
| Mar 18, 3:42 AM EDT | Winter Weather Advisory | BTV | 13 hr |
| Apr 11, 3:47 AM EDT | Winter Weather Advisory | BTV | 40 hr |
| Apr 19, 9:37 AM EDT | Wind Advisory | BTV | 13 hr |
| May 9, 6:40 PM EDT | Special Weather Statement | BTV | 65 min |
| May 14, 12:40 PM EDT | Frost Advisory | BTV | 19 hr |
| May 21, 5:45 PM EDT | Special Weather Statement | BTV | 60 min |
| May 21, 6:07 PM EDT | Severe Thunderstorm Warning | BTV | 53 min |
| May 21, 7:00 PM EDT | Severe Thunderstorm Warning | BTV | 60 min |
| May 22, 12:58 PM EDT | Severe Thunderstorm Watch | SPC | 10 hr |
| May 22, 4:28 PM EDT | Mesoscale Discussion | SPC | 92 min |
| May 22, 8:21 PM EDT | Mesoscale Discussion | SPC | 54 min |
| May 22, 10:13 PM EDT | Severe Thunderstorm Warning | BTV | 62 min |
| May 22, 11:05 PM EDT | Severe Thunderstorm Warning | BTV | 55 min |
| May 23, 4:33 AM EDT | Flash Flood Watch | BTV | 23 hr |
| May 23, 12:37 PM EDT | Special Weather Statement | BTV | 53 min |
| May 26, 4:17 PM EDT | Frost Advisory | BTV | 15 hr |
| May 27, 4:07 PM EDT | Frost Advisory | BTV | 12 hr |
| Jun 1, 6:40 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Jun 1, 6:46 PM EDT | Special Weather Statement | BTV | 89 min |
| Jun 11, 9:57 PM EDT | Areal Flood Warning | BTV | 30 hr |
| Jun 24, 5:40 PM EDT | Special Weather Statement | BTV | 80 min |
| Jun 24, 6:28 PM EDT | Severe Thunderstorm Warning | BTV | 62 min |
| Jun 24, 7:45 PM EDT | Mesoscale Discussion | SPC | 60 min |
| Jun 24, 7:52 PM EDT | Special Weather Statement | BTV | 53 min |
| Jun 25, 12:22 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 25, 7:42 PM EDT | Special Weather Statement | BTV | 63 min |
| Jun 26, 3:52 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Jun 26, 4:09 PM EDT | Flood Watch | BTV | 50 hr |
| Jun 28, 5:06 AM EDT | Special Weather Statement | BTV | 114 min |
| Jun 28, 7:50 AM EDT | Areal Flood Warning | BTV | 6 hr |
| Jul 8, 3:49 AM EDT | Flash Flood Watch | BTV | 16 hr |
| Jul 9, 4:02 PM EDT | Flash Flood Watch | BTV | 36 hr |
| Jul 10, 7:38 PM EDT | Severe Thunderstorm Warning | BTV | 82 min |
| Jul 10, 8:50 PM EDT | Severe Thunderstorm Warning | BTV | 55 min |
| Jul 10, 9:02 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Jul 17, 1:52 PM EDT | Mesoscale Discussion | SPC | 53 min |
| Jul 17, 2:29 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 17, 3:20 PM EDT | Special Weather Statement | BTV | 55 min |
| Jul 17, 7:44 PM EDT | Special Weather Statement | BTV | 61 min |
| Jul 17, 8:28 PM EDT | Mesoscale Discussion | SPC | 62 min |
| Jul 18, 2:44 PM EDT | Special Weather Statement | BTV | 61 min |
| Jul 18, 3:48 PM EDT | Severe Thunderstorm Warning | BTV | 57 min |
| Jul 18, 4:08 PM EDT | Mesoscale Discussion | SPC | 67 min |
| Jul 18, 4:39 PM EDT | Severe Thunderstorm Warning | BTV | 66 min |
| Jul 18, 4:44 PM EDT | Severe Thunderstorm Warning | BTV | 61 min |
| Jul 18, 6:24 PM EDT | Special Weather Statement | BTV | 66 min |
| Jul 19, 2:55 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 19, 4:10 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 19, 5:23 PM EDT | Severe Thunderstorm Warning | BTV | 52 min |
| Jul 19, 6:22 PM EDT | Severe Thunderstorm Warning | BTV | 53 min |
| Jul 19, 7:11 PM EDT | Severe Thunderstorm Warning | BTV | 64 min |
| Jul 24, 1:26 AM EDT | Special Weather Statement | BTV | 64 min |
| Aug 3, 8:47 PM EDT | Special Weather Statement | BTV | 58 min |
| Aug 3, 10:00 PM EDT | Special Weather Statement | BTV | 60 min |
| Aug 4, 6:23 PM EDT | Special Weather Statement | BTV | 52 min |
| Aug 9, 6:30 AM EDT | Flash Flood Warning | BTV | 3 hr |
| Aug 9, 10:18 AM EDT | Special Weather Statement | BTV | 87 min |
| Aug 9, 11:38 AM EDT | Areal Flood Warning | BTV | 4 hr |
| Aug 13, 3:41 PM EDT | Special Weather Statement | BTV | 64 min |
| Aug 22, 2:03 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 28, 11:03 PM EDT | Severe Thunderstorm Warning | BTV | 57 min |
| Sep 2, 3:18 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Sep 2, 3:57 PM EDT | Special Weather Statement | BTV | 63 min |
| Sep 2, 4:26 PM EDT | Special Weather Statement | BTV | 64 min |
| Sep 2, 4:53 PM EDT | Special Weather Statement | BTV | 52 min |
| Sep 2, 5:22 PM EDT | Special Weather Statement | BTV | 53 min |
| Sep 2, 6:17 PM EDT | Severe Thunderstorm Warning | BTV | 58 min |
| Sep 2, 6:52 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Sep 5, 4:05 AM EDT | Frost Advisory | BTV | 28 hr |
| Sep 5, 4:05 AM EDT | Freeze Warning | BTV | 28 hr |
| Sep 8, 3:38 AM EDT | Frost Advisory | BTV | 28 hr |
| Sep 10, 6:22 AM EDT | Mesoscale Discussion | SPC | 53 min |
| Sep 11, 2:33 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Sep 11, 4:44 PM EDT | Severe Thunderstorm Warning | BTV | 61 min |
| Sep 11, 6:54 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Sep 11, 7:36 PM EDT | Severe Thunderstorm Warning | BTV | 54 min |
| Sep 11, 7:57 PM EDT | Severe Thunderstorm Warning | BTV | 48 min |
| Sep 11, 8:51 PM EDT | Severe Thunderstorm Warning | BTV | 54 min |
| Sep 11, 9:39 PM EDT | Special Weather Statement | BTV | 66 min |
| Sep 11, 9:44 PM EDT | Mesoscale Discussion | SPC | 61 min |
| Sep 11, 10:44 PM EDT | Special Weather Statement | BTV | 91 min |
| Sep 11, 10:51 PM EDT | Flash Flood Warning | BTV | 4 hr |
| Sep 12, 12:14 AM EDT | Special Weather Statement | BTV | 2 hr |
| Sep 12, 2:38 AM EDT | Flash Flood Warning | BTV | 4 hr |
| Sep 16, 3:39 AM EDT | Frost Advisory | BTV | 28 hr |
| Sep 16, 3:39 AM EDT | Freeze Warning | BTV | 28 hr |
| Oct 7, 3:38 AM EDT | Wind Advisory | BTV | 16 hr |
| Oct 7, 11:39 AM EDT | Mesoscale Discussion | SPC | 3 hr |
| Oct 15, 12:30 AM EDT | Dense Fog Advisory | BTV | 9 hr |
| Oct 30, 3:18 PM EDT | High Wind Watch | BTV | 12 hr |
| Oct 31, 3:29 AM EDT | High Wind Warning | BTV | 40 hr |
| Nov 17, 3:50 AM EST | Wind Advisory | BTV | 35 hr |
| Nov 18, 1:41 AM EST | Special Weather Statement | BTV | 64 min |
| Nov 18, 1:43 AM EST | Special Weather Statement | BTV | 62 min |
| Nov 25, 3:41 AM EST | Winter Storm Watch | BTV | 12 hr |
| Nov 25, 3:27 PM EST | Winter Storm Warning | BTV | 57 hr |
| Dec 12, 3:48 AM EST | Lake Effect Snow Advisory | BTV | 27 hr |
| Dec 12, 3:27 PM EST | Wind Chill Advisory | BTV | 21 hr |
| Dec 13, 4:01 AM EST | Winter Storm Watch | BTV | 11 hr |
| Dec 13, 2:55 PM EST | Winter Storm Warning | BTV | 46 hr |
| Dec 14, 8:16 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Dec 15, 2:49 PM EST | Wind Chill Advisory | BTV | 19 hr |
| Dec 19, 3:09 PM EST | Winter Weather Advisory | BTV | 37 hr |
| Dec 20, 3:30 AM EST | Winter Storm Watch | BTV | 24 hr |
| Dec 21, 3:39 AM EST | Ice Storm Warning | BTV | 39 hr |
| Dec 21, 3:39 AM EST | Freezing Rain Advisory | BTV | 39 hr |
| Dec 22, 4:55 AM EST | Mesoscale Discussion | SPC | 2 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 archive20122014
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.