Alert archive / Vermont / Chittenden County
Weather alerts in Chittenden County, Vermont, 2018
116 weather alerts in 2018, 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 2018. Tap one for its archive.
- Alerts
- 116
- Warnings
- 35
- Watches
- 12
- Advisories
- 30
- Busiest month
- November16 alerts
- Busiest day
- May 4, 20189 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, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 8 | 7 | 13% | 13 | 92% | 39 min |
| Flash flood warnings | 1 | 1 | 0% | 2 | 100% | 95 min |
Each office's whole area, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Burlington, VT: severe thunderstorm warnings | 40 | 35 | 13% | 81 | 83% | 30 min |
| NWS Burlington, VT: flash flood warnings | 5 | 3 | 40% | 5 | 80% | 90 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 3, 3:19 AM EST | Wind Chill Watch | BTV | 24 hr |
| Jan 3, 3:19 AM EST | Winter Weather Advisory | BTV | 56 hr |
| Jan 4, 3:39 AM EST | Wind Chill Warning | BTV | 3 days |
| Jan 11, 4:08 AM EST | Winter Storm Watch | BTV | 11 hr |
| Jan 11, 2:54 PM EST | Winter Storm Warning | BTV | 46 hr |
| Jan 12, 2:14 AM EST | Flood Watch | BTV | 25 hr |
| Jan 12, 7:04 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Jan 12, 9:59 PM EST | Areal Flood Warning | BTV | 9 hr |
| Jan 12, 10:29 PM EST | River Flood Warning | BTV | 24 hr |
| Jan 13, 12:56 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Jan 13, 6:44 AM EST | Areal Flood Warning | BTV | 12 hr |
| Jan 13, 6:56 AM EST | Areal Flood Warning | BTV | 12 hr |
| Jan 21, 3:07 PM EST | Winter Weather Advisory | BTV | 45 hr |
| Jan 22, 3:25 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Jan 23, 5:47 PM EST | Special Weather Statement | BTV | 58 min |
| Feb 4, 3:12 AM EST | Winter Weather Advisory | BTV | 22 hr |
| Feb 5, 2:15 PM EST | Winter Storm Watch | BTV | 13 hr |
| Feb 6, 2:54 AM EST | Winter Storm Warning | BTV | 42 hr |
| Feb 7, 11:25 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 9, 4:34 PM EST | Winter Weather Advisory | BTV | 25 hr |
| Feb 10, 6:00 PM EST | Winter Weather Advisory | BTV | 9 hr |
| Feb 18, 2:41 AM EST | Flood Watch | BTV | 4 days |
| Feb 21, 9:42 AM EST | River Flood Warning | BTV | 45 hr |
| Feb 21, 2:45 PM EST | Areal Flood Warning | BTV | 17 hr |
| Mar 5, 3:40 AM EST | Winter Storm Watch | BTV | 35 hr |
| Mar 6, 3:24 AM EST | Winter Storm Warning | BTV | 61 hr |
| Mar 6, 2:33 PM EST | Winter Weather Advisory | BTV | 49 hr |
| Mar 9, 3:29 PM EST | Winter Weather Advisory | BTV | 39 hr |
| Mar 12, 3:18 AM EDT | Winter Weather Advisory | BTV | 3 days |
| Mar 13, 6:23 PM EDT | Winter Storm Warning | BTV | 33 hr |
| Apr 3, 3:09 PM EDT | Wind Advisory | BTV | 36 hr |
| Apr 13, 4:13 AM EDT | Winter Weather Advisory | BTV | 3 days |
| Apr 13, 3:20 PM EDT | Flood Watch | BTV | 36 hr |
| Apr 14, 3:10 PM EDT | High Wind Watch | BTV | 12 hr |
| Apr 15, 3:05 AM EDT | High Wind Warning | BTV | 37 hr |
| Apr 15, 3:05 AM EDT | Wind Advisory | BTV | 41 hr |
| May 4, 3:11 AM EDT | Wind Advisory | BTV | 24 hr |
| May 4, 4:02 AM EDT | River Flood Warning | BTV | 5 days |
| May 4, 2:18 PM EDT | Mesoscale Discussion | SPC | 87 min |
| May 4, 3:16 PM EDT | Tornado Watch | SPC | 6 hr |
| May 4, 6:24 PM EDT | Severe Thunderstorm Warning | BTV | 66 min |
| May 4, 6:48 PM EDT | Mesoscale Discussion | SPC | 117 min |
| May 4, 7:12 PM EDT | Severe Thunderstorm Warning | BTV | 63 min |
| May 4, 7:29 PM EDT | Severe Thunderstorm Warning | BTV | 61 min |
| May 4, 7:42 PM EDT | Flash Flood Warning | BTV | 3 hr |
| May 4, 8:25 PM EDT | Severe Thunderstorm Warning | BTV | 65 min |
| May 4, 8:53 PM EDT | Mesoscale Discussion | SPC | 97 min |
| May 4, 10:44 PM EDT | Areal Flood Warning | BTV | 6 hr |
| May 11, 4:00 PM EDT | Frost Advisory | BTV | 16 hr |
| Jun 1, 1:55 PM EDT | Special Weather Statement | BTV | 35 min |
| Jun 1, 2:33 PM EDT | Special Weather Statement | BTV | 42 min |
| Jun 17, 2:43 PM EDT | Heat Advisory | BTV | 26 hr |
| Jun 18, 12:19 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Jun 18, 1:21 PM EDT | Special Weather Statement | BTV | 39 min |
| Jun 18, 2:13 PM EDT | Special Weather Statement | BTV | 62 min |
| Jun 18, 2:23 PM EDT | Severe Thunderstorm Warning | BTV | 52 min |
| Jun 18, 2:49 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 18, 3:10 PM EDT | Severe Thunderstorm Warning | BTV | 65 min |
| Jun 18, 3:37 PM EDT | Severe Thunderstorm Warning | BTV | 53 min |
| Jun 18, 9:19 PM EDT | Special Weather Statement | BTV | 56 min |
| Jun 29, 3:35 AM EDT | Heat Advisory | BTV | 5 days |
| Jun 30, 3:49 PM EDT | Excessive Heat Warning | BTV | 53 hr |
| Jun 30, 5:07 PM EDT | Mesoscale Discussion | SPC | 83 min |
| Jun 30, 10:10 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 4, 3:33 PM EDT | Heat Advisory | BTV | 28 hr |
| Jul 10, 12:57 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 14, 6:47 PM EDT | Special Weather Statement | BTV | 58 min |
| Jul 17, 1:44 PM EDT | Special Weather Statement | BTV | 31 min |
| Jul 25, 8:44 PM EDT | Special Weather Statement | BTV | 61 min |
| Jul 27, 9:39 PM EDT | Special Weather Statement | BTV | 51 min |
| Jul 28, 1:49 PM EDT | Special Weather Statement | BTV | 41 min |
| Jul 28, 3:03 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Aug 4, 2:00 PM EDT | Special Weather Statement | BTV | 60 min |
| Aug 4, 2:13 PM EDT | Severe Thunderstorm Warning | BTV | 62 min |
| Aug 5, 3:34 PM EDT | Heat Advisory | BTV | 28 hr |
| Aug 15, 3:04 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 15, 5:39 PM EDT | Special Weather Statement | BTV | 66 min |
| Aug 15, 9:00 PM EDT | Special Weather Statement | BTV | 45 min |
| Aug 27, 3:08 AM EDT | Heat Advisory | BTV | 64 hr |
| Aug 29, 1:19 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Aug 29, 3:45 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 29, 4:20 PM EDT | Special Weather Statement | BTV | 55 min |
| Sep 3, 1:34 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Sep 4, 3:43 PM EDT | Heat Advisory | BTV | 27 hr |
| Sep 20, 3:15 PM EDT | Wind Advisory | BTV | 32 hr |
| Sep 22, 2:55 AM EDT | Frost Advisory | BTV | 30 hr |
| Sep 26, 12:42 PM EDT | Special Weather Statement | BTV | 63 min |
| Sep 26, 2:43 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 26, 5:09 PM EDT | Special Weather Statement | BTV | 66 min |
| Oct 5, 3:29 AM EDT | Frost Advisory | BTV | 24 hr |
| Oct 13, 3:27 AM EDT | Frost Advisory | BTV | 28 hr |
| Oct 13, 3:27 AM EDT | Freeze Warning | BTV | 28 hr |
| Oct 17, 2:34 PM EDT | Freeze Warning | BTV | 18 hr |
| Oct 18, 1:57 PM EDT | Freeze Warning | BTV | 13 hr |
| Oct 21, 3:23 PM EDT | Freeze Warning | BTV | 16 hr |
| Nov 9, 9:46 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Nov 12, 3:07 AM EST | Winter Weather Advisory | BTV | 34 hr |
| Nov 14, 3:15 PM EST | Winter Weather Advisory | BTV | 45 hr |
| Nov 15, 3:28 AM EST | Winter Storm Warning | BTV | 33 hr |
| Nov 15, 10:06 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Nov 16, 3:56 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Nov 21, 9:09 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Nov 21, 11:32 AM EST | Snow Squall Warning | BTV | 43 min |
| Nov 21, 12:16 PM EST | Snow Squall Warning | BTV | 44 min |
| Nov 21, 1:28 PM EST | Snow Squall Warning | BTV | 62 min |
| Nov 21, 3:00 PM EST | Snow Squall Warning | BTV | 60 min |
| Nov 23, 2:49 PM EST | Winter Weather Advisory | BTV | 45 hr |
| Nov 26, 3:11 AM EST | Winter Storm Warning | BTV | 34 hr |
| Nov 26, 3:11 AM EST | Winter Weather Advisory | BTV | 64 hr |
| Nov 26, 8:34 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Nov 30, 2:08 PM EST | Winter Weather Advisory | BTV | 46 hr |
| Dec 19, 2:42 PM EST | Flood Watch | BTV | 69 hr |
| Dec 20, 3:07 AM EST | Wind Advisory | BTV | 33 hr |
| Dec 22, 4:47 AM EST | River Flood Warning | BTV | 27 hr |
| Dec 26, 3:11 PM EST | Winter Weather Advisory | BTV | 48 hr |
| Dec 28, 2:59 AM EST | Mesoscale Discussion | SPC | 6 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.