Alert archive / Vermont / Chittenden County
Weather alerts in Chittenden County, Vermont, 2017
130 weather alerts in 2017, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Chittenden County and its neighbors
Each county as a circle sized by its count in 2017. Tap one for its archive.
- Alerts
- 130
- Warnings
- 32
- Watches
- 15
- Advisories
- 27
- Busiest month
- June23 alerts
- Busiest day
- May 18, 20175 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Chittenden County, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 14 | 11 | 21% | 12 | 67% | 17 min |
| Flash flood warnings | 1 | 1 | 0% | 1 | 100% | 81 min |
Each office's whole area, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Burlington, VT: severe thunderstorm warnings | 68 | 51 | 25% | 128 | 84% | 23 min |
| NWS Burlington, VT: flash flood warnings | 16 | 12 | 25% | 24 | 100% | 79 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 9, 3:23 PM EST | Wind Advisory | BTV | 44 hr |
| Jan 10, 3:20 AM EST | High Wind Warning | BTV | 24 hr |
| Jan 16, 3:31 PM EST | Winter Weather Advisory | BTV | 42 hr |
| Jan 22, 2:31 PM EST | Winter Weather Advisory | BTV | 55 hr |
| Jan 23, 11:48 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Jan 24, 5:44 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Jan 27, 8:20 PM EST | Special Weather Statement | BTV | 40 min |
| Feb 2, 8:39 PM EST | Special Weather Statement | BTV | 36 min |
| Feb 2, 9:44 PM EST | Special Weather Statement | BTV | 61 min |
| Feb 3, 10:48 AM EST | Special Weather Statement | BTV | 57 min |
| Feb 5, 11:33 PM EST | Special Weather Statement | BTV | 87 min |
| Feb 6, 3:15 PM EST | Winter Weather Advisory | BTV | 43 hr |
| Feb 7, 5:44 PM EST | Mesoscale Discussion | SPC | 5 hr |
| Feb 7, 11:18 PM EST | Mesoscale Discussion | SPC | 5 hr |
| Feb 10, 2:25 PM EST | Winter Storm Watch | BTV | 24 hr |
| Feb 11, 2:48 PM EST | Winter Storm Warning | BTV | 49 hr |
| Feb 12, 10:21 AM EST | Special Weather Statement | BTV | 3 hr |
| Feb 12, 2:51 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 14, 3:18 PM EST | Winter Storm Warning | BTV | 45 hr |
| Feb 14, 3:18 PM EST | Winter Weather Advisory | BTV | 45 hr |
| Feb 23, 3:36 AM EST | Flood Watch | BTV | 3 days |
| Feb 25, 3:40 PM EST | Special Weather Statement | BTV | 65 min |
| Feb 25, 10:10 PM EST | River Flood Warning | BTV | 31 hr |
| Mar 1, 6:46 PM EST | Wind Advisory | BTV | 18 hr |
| Mar 3, 3:47 AM EST | Wind Chill Advisory | BTV | 27 hr |
| Mar 3, 9:23 PM EST | Special Weather Statement | BTV | 52 min |
| Mar 4, 3:09 PM EST | Wind Chill Advisory | BTV | 17 hr |
| Mar 8, 2:44 PM EST | Special Weather Statement | BTV | 61 min |
| Mar 10, 3:30 AM EST | Wind Chill Advisory | BTV | 56 hr |
| Mar 11, 3:15 PM EST | Winter Storm Watch | BTV | 36 hr |
| Mar 13, 3:49 AM EDT | Winter Storm Warning | BTV | 57 hr |
| Mar 14, 3:47 AM EDT | Blizzard Warning | BTV | 24 hr |
| Mar 14, 1:57 PM EDT | Mesoscale Discussion | SPC | 5 hr |
| Mar 14, 5:36 PM EDT | Mesoscale Discussion | SPC | 6 hr |
| Mar 15, 3:25 AM EDT | Winter Weather Advisory | BTV | 9 hr |
| Mar 15, 12:51 PM EDT | Winter Weather Advisory | BTV | 14 hr |
| Mar 25, 4:00 PM EDT | Winter Weather Advisory | BTV | 12 hr |
| Mar 26, 3:51 AM EDT | Freezing Rain Advisory | BTV | 31 hr |
| Mar 30, 3:45 AM EDT | Winter Weather Advisory | BTV | 58 hr |
| Apr 3, 2:36 PM EDT | Wind Advisory | BTV | 24 hr |
| Apr 4, 2:57 PM EDT | Flood Watch | BTV | 60 hr |
| Apr 16, 4:12 PM EDT | Special Weather Statement | BTV | 63 min |
| Apr 19, 4:40 AM EDT | River Flood Warning | BTV | 34 hr |
| Apr 21, 10:06 AM EDT | River Flood Warning | BTV | 27 hr |
| May 1, 6:29 PM EDT | Mesoscale Discussion | SPC | 61 min |
| May 3, 3:57 PM EDT | Frost Advisory | BTV | 15 hr |
| May 5, 5:04 PM EDT | Wind Advisory | BTV | 3 hr |
| May 18, 2:04 PM EDT | Mesoscale Discussion | SPC | 116 min |
| May 18, 3:36 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 18, 5:29 PM EDT | Severe Thunderstorm Warning | BTV | 41 min |
| May 18, 5:36 PM EDT | Mesoscale Discussion | SPC | 84 min |
| May 18, 6:07 PM EDT | Severe Thunderstorm Warning | BTV | 53 min |
| May 18, 10:20 PM EDT | Severe Thunderstorm Warning | BTV | 40 min |
| May 24, 4:23 PM EDT | Wind Advisory | BTV | 30 hr |
| May 31, 12:29 PM EDT | Mesoscale Discussion | SPC | 61 min |
| May 31, 1:22 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 31, 2:30 PM EDT | Severe Thunderstorm Warning | BTV | 45 min |
| May 31, 3:14 PM EDT | Severe Thunderstorm Warning | BTV | 46 min |
| Jun 7, 3:22 AM EDT | Dense Fog Advisory | BTV | 4 hr |
| Jun 17, 3:30 PM EDT | Flash Flood Watch | BTV | 52 hr |
| Jun 18, 3:31 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 18, 8:23 PM EDT | Special Weather Statement | BTV | 52 min |
| Jun 18, 10:47 PM EDT | Special Weather Statement | BTV | 43 min |
| Jun 18, 11:27 PM EDT | Severe Thunderstorm Warning | BTV | 48 min |
| Jun 19, 10:45 AM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 19, 12:24 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 20, 3:34 PM EDT | Special Weather Statement | BTV | 26 min |
| Jun 23, 9:45 AM EDT | Flash Flood Watch | BTV | 10 hr |
| Jun 23, 2:02 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 23, 3:06 PM EDT | Special Weather Statement | BTV | 54 min |
| Jun 25, 1:12 PM EDT | Special Weather Statement | BTV | 63 min |
| Jun 25, 2:20 PM EDT | Special Weather Statement | BTV | 55 min |
| Jun 27, 11:58 AM EDT | Special Weather Statement | BTV | 32 min |
| Jun 27, 12:31 PM EDT | Special Weather Statement | BTV | 29 min |
| Jun 27, 1:10 PM EDT | Special Weather Statement | BTV | 35 min |
| Jun 27, 5:03 PM EDT | Special Weather Statement | BTV | 57 min |
| Jun 27, 5:10 PM EDT | Severe Thunderstorm Warning | BTV | 65 min |
| Jun 29, 11:09 PM EDT | Flash Flood Warning | BTV | 3 hr |
| Jun 30, 2:24 AM EDT | Areal Flood Warning | BTV | 6 hr |
| Jun 30, 3:34 AM EDT | Flash Flood Watch | BTV | 47 hr |
| Jun 30, 8:54 AM EDT | River Flood Warning | BTV | 23 hr |
| Jul 1, 5:56 PM EDT | River Flood Warning | BTV | 32 hr |
| Jul 7, 1:29 PM EDT | Severe Thunderstorm Warning | BTV | 30 min |
| Jul 8, 6:29 AM EDT | Severe Thunderstorm Warning | BTV | 91 min |
| Jul 8, 7:54 AM EDT | Special Weather Statement | BTV | 66 min |
| Jul 8, 1:11 PM EDT | Special Weather Statement | BTV | 64 min |
| Jul 8, 2:05 PM EDT | Severe Thunderstorm Warning | BTV | 55 min |
| Jul 17, 12:14 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 17, 12:48 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 17, 1:10 PM EDT | Special Weather Statement | BTV | 65 min |
| Jul 17, 3:37 PM EDT | Mesoscale Discussion | SPC | 53 min |
| Jul 20, 1:38 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 2, 1:30 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 3, 4:27 PM EDT | Special Weather Statement | BTV | 48 min |
| Aug 4, 5:53 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 5, 11:36 AM EDT | Mesoscale Discussion | SPC | 114 min |
| Aug 5, 5:30 PM EDT | Special Weather Statement | BTV | 45 min |
| Aug 12, 4:33 PM EDT | Special Weather Statement | BTV | 57 min |
| Aug 12, 6:00 PM EDT | Severe Thunderstorm Warning | BTV | 60 min |
| Aug 12, 6:32 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Aug 12, 7:04 PM EDT | Severe Thunderstorm Warning | BTV | 56 min |
| Aug 15, 7:01 PM EDT | Special Weather Statement | BTV | 29 min |
| Aug 18, 10:16 PM EDT | Special Weather Statement | BTV | 59 min |
| Aug 22, 12:23 PM EDT | Tornado Watch | SPC | 9 hr |
| Aug 22, 2:44 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 22, 4:48 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Aug 22, 6:00 PM EDT | Severe Thunderstorm Warning | BTV | 33 min |
| Aug 22, 6:28 PM EDT | Severe Thunderstorm Warning | BTV | 77 min |
| Sep 27, 11:09 PM EDT | Special Weather Statement | BTV | 36 min |
| Oct 8, 10:07 AM EDT | Special Weather Statement | BTV | 83 min |
| Oct 11, 3:07 PM EDT | Frost Advisory | BTV | 16 hr |
| Oct 12, 2:47 PM EDT | Frost Advisory | BTV | 16 hr |
| Oct 16, 2:26 AM EDT | Freeze Warning | BTV | 29 hr |
| Oct 28, 2:24 PM EDT | High Wind Watch | BTV | 22 hr |
| Oct 29, 3:34 AM EDT | High Wind Warning | BTV | 28 hr |
| Nov 5, 2:53 AM EST | Wind Advisory | BTV | 16 hr |
| Dec 4, 2:27 PM EST | Wind Advisory | BTV | 25 hr |
| Dec 5, 10:40 PM EST | Special Weather Statement | BTV | 65 min |
| Dec 5, 11:44 PM EST | Special Weather Statement | BTV | 76 min |
| Dec 10, 2:58 PM EST | Winter Storm Watch | BTV | 13 hr |
| Dec 11, 3:45 AM EST | Winter Storm Warning | BTV | 56 hr |
| Dec 11, 3:45 AM EST | Winter Weather Advisory | BTV | 56 hr |
| Dec 21, 3:08 AM EST | Winter Weather Advisory | BTV | 66 hr |
| Dec 22, 3:32 AM EST | Winter Storm Warning | BTV | 23 hr |
| Dec 23, 3:35 PM EST | Winter Storm Watch | BTV | 11 hr |
| Dec 24, 2:52 AM EST | Winter Storm Warning | BTV | 33 hr |
| Dec 25, 8:12 PM EST | Special Weather Statement | BTV | 48 min |
| Dec 26, 3:04 AM EST | Wind Chill Advisory | BTV | 3 days |
| Dec 27, 3:44 AM EST | Wind Chill Warning | BTV | 48 hr |
| Dec 30, 3:45 AM EST | Wind Chill Advisory | BTV | 56 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 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.