Alert archive / Massachusetts / Special Weather Statements in 2011

Special Weather Statement, NWS Boston/Norton, MA

August 25, 2011Essex County, Norfolk County, Suffolk County, Massachusetts

NWS Boston/Norton, MA issued this special weather statement at Aug 25, 2011, 2:24 PM EDT for Essex County, Norfolk County, Suffolk County, Massachusetts. It was in force for 51 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 25, 2011, 2:24 PM EDT (18:24 UTC)
Expired: Aug 25, 2011, 3:15 PM EDT
In force: 51 min
Issued by: NWS Boston/Norton, MA

Counties Essex County, MA, Norfolk County, MA, Suffolk County, MA

The radar

The Boston radar (KBOX), 57 km from the middle of the area, began a volume at 18:27 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

Brookhaven, NY (KOKX), launched 12:00Z, 6.4 hours before the alert went out and 237 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: 285 J/kg
Mixed-layer CIN: -44 J/kg
Mixed-layer LCL: 763 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 222 m²/s²
0-3 km storm-relative helicity: 282 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 2.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Aug 25, 11:00 AM EDT, 3 hours 24 minutes earlier.

Area forecast discussion, Aug 25, 11:00 AM EDT, 3 hours 24 minutes before

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Hazardous weather outlook, Aug 25, 4:34 AM EDT, 9 hours 50 minutes before

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In the hours before

Special weather statement, Aug 25, 10:50 AM EDT, 3 hours 34 minutes before

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Special weather statement, Aug 25, 1:21 PM EDT, 1 hour 3 minutes before

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Special weather statement, Aug 25, 2:24 PM EDT, 0 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
Aug 25, 1:21 PM EDT	Special Weather Statement	BOX	Essex, Middlesex	54 min
Aug 25, 5:03 PM EDT	Rip Current Statement	BOX	Barnstable, Bristol, Dukes, Nantucket	13 hr
Aug 25, 7:55 PM EDT	Special Weather Statement	BOX	Hampshire	65 min
Aug 25, 10:50 AM EDT	Special Weather Statement	BOX	Cheshire	55 min

Nearby

Special Weather Statements in Massachusetts, 2011 Every special weather statement 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.