Alert archive / Vermont / Caledonia County
Weather alerts in Caledonia County, Vermont, 2020
77 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Caledonia County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 77
- Warnings
- 21
- Watches
- 8
- Advisories
- 18
- Busiest month
- July21 alerts
- Busiest day
- July 8, 202010 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Caledonia County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 11 | 9 | 18% | 2 | 100% | 28 min |
| Flash flood warnings | 3 | 2 | 33% | 3 | 67% | 135 min |
Each office's whole area, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Burlington, VT: tornado warnings | 2 | 0 | 100% | 0 | ||
| NWS Burlington, VT: severe thunderstorm warnings | 71 | 48 | 32% | 101 | 80% | 19 min |
| NWS Burlington, VT: flash flood warnings | 9 | 4 | 56% | 7 | 86% | 74 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, 3:34 AM EST | Winter Weather Advisory | BTV | 24 hr |
| Jan 8, 2:16 PM EST | Special Weather Statement | BTV | 59 min |
| Jan 8, 3:20 PM EST | Special Weather Statement | BTV | 55 min |
| Jan 9, 4:10 PM EST | Flood Watch | BTV | 71 hr |
| Jan 12, 10:17 AM EST | Areal Flood Warning | BTV | 6 hr |
| Jan 15, 3:44 AM EST | Winter Weather Advisory | BTV | 39 hr |
| Jan 15, 3:09 PM EST | Wind Chill Advisory | BTV | 43 hr |
| Jan 16, 6:47 PM EST | Winter Weather Advisory | BTV | 6 hr |
| Jan 17, 2:51 PM EST | Winter Weather Advisory | BTV | 46 hr |
| Jan 24, 2:19 PM EST | Winter Weather Advisory | BTV | 38 hr |
| Feb 5, 3:21 AM EST | Winter Storm Watch | BTV | 12 hr |
| Feb 5, 3:27 PM EST | Winter Storm Warning | BTV | 54 hr |
| Feb 7, 9:58 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 7, 3:03 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 12, 3:03 AM EST | Winter Weather Advisory | BTV | 34 hr |
| Feb 25, 3:50 AM EST | Winter Storm Watch | BTV | 24 hr |
| Feb 26, 3:23 AM EST | Winter Weather Advisory | BTV | 70 hr |
| Mar 22, 2:40 PM EDT | Winter Weather Advisory | BTV | 34 hr |
| Mar 23, 3:26 PM EDT | Mesoscale Discussion | SPC | 6 hr |
| Mar 23, 7:30 PM EDT | Winter Storm Warning | BTV | 6 hr |
| Apr 8, 2:43 PM EDT | Winter Storm Watch | BTV | 13 hr |
| Apr 9, 3:53 AM EDT | Winter Weather Advisory | BTV | 33 hr |
| Apr 13, 9:33 PM EDT | Areal Flood Warning | BTV | 13 hr |
| Apr 14, 6:36 AM EDT | Areal Flood Warning | BTV | 4 hr |
| Apr 25, 2:55 PM EDT | Winter Weather Advisory | BTV | 42 hr |
| May 15, 6:46 PM EDT | Severe Thunderstorm Warning | BTV | 59 min |
| May 27, 2:27 PM EDT | Mesoscale Discussion | SPC | 93 min |
| May 29, 3:01 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 29, 7:31 PM EDT | Severe Thunderstorm Warning | BTV | 44 min |
| May 29, 8:01 PM EDT | Mesoscale Discussion | SPC | 119 min |
| May 29, 8:08 PM EDT | Severe Thunderstorm Warning | BTV | 52 min |
| May 31, 3:38 PM EDT | Frost Advisory | BTV | 15 hr |
| Jun 6, 10:53 AM EDT | Special Weather Statement | BTV | 22 min |
| Jun 28, 1:58 PM EDT | Special Weather Statement | BTV | 62 min |
| Jul 1, 5:07 PM EDT | Severe Thunderstorm Warning | BTV | 53 min |
| Jul 2, 2:41 PM EDT | Mesoscale Discussion | SPC | 109 min |
| Jul 8, 1:01 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Jul 8, 2:00 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 8, 2:34 PM EDT | Special Weather Statement | GYX | 26 min |
| Jul 8, 3:38 PM EDT | Severe Thunderstorm Warning | BTV | 37 min |
| Jul 8, 3:48 PM EDT | Severe Thunderstorm Warning | BTV | 46 min |
| Jul 8, 4:24 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Jul 8, 4:30 PM EDT | Special Weather Statement | BTV | 60 min |
| Jul 8, 4:49 PM EDT | Special Weather Statement | BTV | 41 min |
| Jul 8, 5:18 PM EDT | Severe Thunderstorm Warning | BTV | 42 min |
| Jul 8, 5:57 PM EDT | Severe Thunderstorm Warning | BTV | 63 min |
| Jul 13, 1:39 PM EDT | Special Weather Statement | BTV | 36 min |
| Jul 13, 2:21 PM EDT | Special Weather Statement | GYX | 39 min |
| Jul 14, 4:56 AM EDT | Special Weather Statement | BTV | 64 min |
| Jul 14, 7:12 AM EDT | Special Weather Statement | BTV | 48 min |
| Jul 14, 7:26 AM EDT | Flash Flood Warning | BTV | 6 hr |
| Jul 14, 9:02 AM EDT | Flash Flood Warning | BTV | 4 hr |
| Jul 14, 9:21 AM EDT | Flash Flood Warning | BTV | 3 hr |
| Jul 18, 3:17 AM EDT | Heat Advisory | BTV | 40 hr |
| Jul 27, 4:47 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 2, 11:48 PM EDT | Special Weather Statement | BTV | 57 min |
| Aug 3, 3:02 AM EDT | Flash Flood Watch | BTV | 43 hr |
| Aug 3, 3:13 PM EDT | Wind Advisory | BTV | 31 hr |
| Aug 24, 2:00 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 24, 4:01 PM EDT | Special Weather Statement | BTV | 59 min |
| Sep 11, 3:03 AM EDT | Frost Advisory | BTV | 29 hr |
| Sep 14, 2:59 AM EDT | Frost Advisory | BTV | 30 hr |
| Sep 18, 3:54 PM EDT | Freeze Warning | BTV | 16 hr |
| Oct 10, 1:48 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Oct 10, 2:13 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Oct 10, 3:48 PM EDT | Special Weather Statement | BTV | 42 min |
| Oct 10, 4:38 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Oct 10, 5:36 PM EDT | Severe Thunderstorm Warning | BTV | 24 min |
| Oct 10, 6:08 PM EDT | Special Weather Statement | BTV | 67 min |
| Oct 10, 6:27 PM EDT | Severe Thunderstorm Warning | BTV | 48 min |
| Oct 10, 6:43 PM EDT | Severe Thunderstorm Warning | BTV | 32 min |
| Oct 10, 6:44 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 10, 8:38 PM EDT | Mesoscale Discussion | SPC | 67 min |
| Nov 1, 2:55 PM EST | Winter Weather Advisory | BTV | 39 hr |
| Nov 15, 9:42 PM EST | Special Weather Statement | BTV | 78 min |
| Dec 4, 2:37 PM EST | Winter Storm Warning | BTV | 43 hr |
| Dec 4, 2:37 PM EST | Winter Weather Advisory | BTV | 43 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
| Product | Alerts |
|---|---|
| Severe storms | |
| Severe Thunderstorm Warning | 11 |
| Severe Thunderstorm Watch | 3 |
| Mesoscale Discussion | 14 |
| Special Weather Statement | 16 |
| Flooding | |
| Areal Flood Warning | 3 |
| Flash Flood Warning | 3 |
| Flash Flood Watch | 1 |
| Flood Watch | 1 |
| Winter | |
| Winter Storm Warning | 3 |
| Winter Storm Watch | 3 |
| Winter Weather Advisory | 12 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Freeze Warning | 1 |
| Frost Advisory | 3 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| Wind Advisory | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20192021
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.