Alert archive / Vermont / Lamoille County
Weather alerts in Lamoille County, Vermont, 2020
75 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Lamoille County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 75
- Warnings
- 16
- Watches
- 9
- Advisories
- 19
- Busiest month
- July12 alerts
- Busiest day
- July 8, 20209 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Lamoille County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 12 | 10 | 17% | 1 | 100% | 44 min |
| Flash flood warnings | 0 | 0 |
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 9, 4:10 PM EST | Flood Watch | BTV | 71 hr |
| Jan 10, 3:38 PM EST | Winter Weather Advisory | BTV | 43 hr |
| Jan 14, 3:00 PM EST | Winter Storm Watch | BTV | 13 hr |
| Jan 15, 3:44 AM EST | Winter Storm Warning | 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 20, 3:43 PM EDT | Severe Thunderstorm Warning | BTV | 34 min |
| Mar 22, 2:40 PM EDT | Winter Weather Advisory | BTV | 34 hr |
| Mar 23, 3:26 PM EDT | Mesoscale Discussion | SPC | 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 9, 3:49 PM EDT | Special Weather Statement | BTV | 41 min |
| Apr 25, 2:55 PM EDT | Winter Weather Advisory | BTV | 42 hr |
| May 12, 12:58 PM EDT | Freeze Warning | BTV | 18 hr |
| May 13, 1:34 PM EDT | Freeze Warning | BTV | 17 hr |
| May 29, 3:01 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 29, 3:56 PM EDT | Severe Thunderstorm Warning | BTV | 49 min |
| May 29, 4:45 PM EDT | Special Weather Statement | BTV | 45 min |
| May 29, 7:31 PM EDT | Severe Thunderstorm Warning | BTV | 44 min |
| May 29, 7:39 PM EDT | Severe Thunderstorm Warning | BTV | 31 min |
| May 29, 8:01 PM EDT | Mesoscale Discussion | SPC | 119 min |
| May 31, 3:38 PM EDT | Frost Advisory | BTV | 15 hr |
| Jun 20, 5:39 PM EDT | Severe Thunderstorm Warning | BTV | 51 min |
| Jun 22, 7:22 PM EDT | Special Weather Statement | BTV | 38 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, 3:20 PM EDT | Special Weather Statement | BTV | 40 min |
| Jul 8, 3:51 PM EDT | Special Weather Statement | BTV | 39 min |
| Jul 8, 4:24 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Jul 8, 4:30 PM EDT | Severe Thunderstorm Warning | BTV | 45 min |
| Jul 8, 4:43 PM EDT | Severe Thunderstorm Warning | BTV | 47 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 18, 3:17 AM EDT | Heat Advisory | BTV | 40 hr |
| Jul 27, 4:47 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 2, 6:45 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 10, 8:36 PM EDT | Special Weather Statement | BTV | 54 min |
| Aug 11, 7:25 PM EDT | Special Weather Statement | BTV | 65 min |
| Aug 11, 8:00 PM EDT | Severe Thunderstorm Warning | BTV | 60 min |
| Aug 11, 8:49 PM EDT | Special Weather Statement | BTV | 56 min |
| Aug 11, 9:16 PM EDT | Special Weather Statement | BTV | 59 min |
| Aug 18, 6:00 PM EDT | Special Weather Statement | BTV | 60 min |
| Sep 14, 2:59 AM EDT | Frost Advisory | BTV | 30 hr |
| Sep 18, 3:54 PM EDT | Frost Advisory | 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, 2:26 PM EDT | Severe Thunderstorm Warning | BTV | 64 min |
| 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, 4:50 PM EDT | Special Weather Statement | BTV | 40 min |
| Oct 10, 5:21 PM EDT | Severe Thunderstorm Warning | BTV | 54 min |
| Oct 10, 6:44 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 10, 7:40 PM EDT | Special Weather Statement | BTV | 50 min |
| Nov 1, 2:55 PM EST | Winter Weather Advisory | BTV | 39 hr |
| Nov 15, 8:34 PM EST | Special Weather Statement | BTV | 86 min |
| Nov 15, 9:42 PM EST | Special Weather Statement | BTV | 78 min |
| Dec 2, 3:53 PM EST | Special Weather Statement | BTV | 52 min |
| Dec 2, 4:44 PM EST | Special Weather Statement | BTV | 61 min |
| Dec 4, 2:37 PM EST | Winter Weather Advisory | BTV | 43 hr |
| Dec 24, 3:43 PM EST | Wind Advisory | BTV | 18 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 | 12 |
| Severe Thunderstorm Watch | 3 |
| Mesoscale Discussion | 12 |
| Special Weather Statement | 19 |
| Flooding | |
| Flash Flood Watch | 1 |
| Flood Watch | 1 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 4 |
| Winter Weather Advisory | 12 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Freeze Warning | 2 |
| Frost Advisory | 3 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| Wind Advisory | 2 |
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.