Alert archive / Massachusetts / Dense Fog Advisories in 2011

Dense Fog Advisory 9, NWS Boston/Norton, MA

May 26, 2011Barnstable County, Dukes County, Nantucket County, Massachusetts; Washington County, Rhode Island

NWS Boston/Norton, MA issued this dense fog advisory at May 26, 2011, 9:03 AM EDT for Barnstable County, Dukes County, Nantucket County, Massachusetts; Washington County, Rhode Island. It was in force for 117 min.

The area

The counties it named.

The facts

Issued: May 26, 2011, 9:03 AM EDT (13:03 UTC)
Expired: May 26, 2011, 11:00 AM EDT
In force: 117 min
Issued by: NWS Boston/Norton, MA

Counties Barnstable County, MA, Dukes County, MA, Nantucket County, MA, Washington County, RI

The radar

The Boston radar (KBOX), 70 km from the middle of the area, began a volume at 13:00 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.

The nearest sounding before it

Gray, ME (KGYX), launched 12:00Z, 1.1 hours before the alert went out and 275 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 986 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 206 m²/s²
0-3 km storm-relative helicity: 272 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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 May 26, 7:16 AM EDT, 1 hour 47 minutes earlier.

Area forecast discussion, May 26, 7:16 AM EDT, 1 hour 47 minutes before

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Hazardous weather outlook, May 26, 4:13 AM EDT, 4 hours 50 minutes before

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In the hours before

Special weather statement, May 26, 4:13 AM EDT, 4 hours 50 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
May 26, 6:06 AM EDT	Dense Fog Advisory	BOX	Barnstable, Bristol, Norfolk, Plymouth	3 hr

Nearby

Dense Fog Advisories in Massachusetts, 2011 Dense Fog Advisories in Rhode Island, 2011 Every dense fog advisory in 2011

Sources

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