Alert archive / Massachusetts / Dense Fog Advisories in 2021

Dense Fog Advisory 10, NWS Boston/Norton, MA

October 12, 20216 counties in Massachusetts; Providence County, Rhode Island

NWS Boston/Norton, MA issued this dense fog advisory at Oct 12, 2021, 1:11 AM EDT for 6 counties in Massachusetts; Providence County, Rhode Island. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued: Oct 12, 2021, 1:11 AM EDT (05:11 UTC)
Expired: Oct 12, 2021, 9:00 AM EDT
In force: 8 hr
Issued by: NWS Boston/Norton, MA

Counties Bristol County, MA, Essex County, MA, Middlesex County, MA, Norfolk County, MA, Plymouth County, MA, Suffolk County, MA, Providence County, RI

The radar

The Boston radar (KBOX), 25 km from the middle of the area, began a volume at 05:14 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What forecasters said that day

The local office's own words before this dense fog advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Boston/Norton, MA wrote its last area forecast discussion before this dense fog advisory went out at Oct 11, 7:44 PM EDT, 5 hours 27 minutes earlier.

Area forecast discussion, Oct 11, 7:44 PM EDT, 5 hours 27 minutes before

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Hazardous weather outlook, Oct 11, 4:34 PM EDT, 8 hours 37 minutes before

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The office that day

Everything else NWS Boston/Norton, MA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Oct 12, 5:00 PM EDT	Small Craft Advisory	BOX		3 hr

Nearby

Dense Fog Advisories in Massachusetts, 2021 Dense Fog Advisories in Rhode Island, 2021 Every dense fog advisory in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.