Alert archive / Massachusetts / Dense Fog Advisories
Dense Fog Advisories in Massachusetts, 2021
13 dense fog advisories in 2021. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of dense fog advisories reaches back to 2005.
Dense Fog Advisories by county
Each county as a circle sized by its count in 2021. Tap one for its archive.
- Dense Fog Advisories
- 13
- Busiest month
- July3 dense fog advisories
- Busiest day
- March 25, 20211 dense fog advisories
Over time
By month
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 | Counties | Lasted |
|---|---|---|---|---|
| Mar 25, 7:57 PM EDT | Dense Fog Advisory | BOX | Barnstable, Bristol, Dukes, Nantucket, Plymouth | 16 hr |
| Mar 28, 4:20 PM EDT | Dense Fog Advisory | BOX | Barnstable, Bristol, Dukes, Nantucket, Plymouth | 4 hr |
| Apr 11, 2:39 AM EDT | Dense Fog Advisory | BOX | Barnstable, Bristol, Dukes, Nantucket, Plymouth | 7 hr |
| Apr 29, 6:41 AM EDT | Dense Fog Advisory | BOX | Barnstable, Dukes, Nantucket | 2 hr |
| Jun 4, 10:48 PM EDT | Dense Fog Advisory | BOX | Barnstable, Bristol, Dukes, Nantucket, Norfolk, Plymouth | 10 hr |
| Jul 14, 12:32 AM EDT | Dense Fog Advisory | BOX | Barnstable, Bristol, Dukes, Essex, Middlesex, Nantucket and 4 more | 9 hr |
| Jul 14, 10:05 PM EDT | Dense Fog Advisory | BOX | Barnstable, Bristol, Dukes, Nantucket, Norfolk, Plymouth | 11 hr |
| Jul 26, 6:02 AM EDT | Dense Fog Advisory | ALY | Berkshire | 3 hr |
| Aug 11, 7:49 PM EDT | Dense Fog Advisory | BOX | Barnstable, Bristol, Dukes, Nantucket, Plymouth | 10 hr |
| Sep 17, 8:10 PM EDT | Dense Fog Advisory | BOX | Barnstable, Bristol, Essex, Middlesex, Norfolk, Plymouth and 2 more | 12 hr |
| Oct 12, 1:11 AM EDT | Dense Fog Advisory | BOX | Bristol, Essex, Middlesex, Norfolk, Plymouth, Suffolk | 8 hr |
| Dec 22, 9:18 AM EST | Dense Fog Advisory | BOX | Barnstable, Bristol, Dukes, Essex, Middlesex, Nantucket and 4 more | 5 hr |
| Dec 30, 9:25 PM EST | Dense Fog Advisory | BOX | Bristol, Essex, Franklin, Hampden, Hampshire, Middlesex and 3 more | 13 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20202022
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.