Alert archive / Massachusetts / Special Weather Statements in 2018

Special Weather Statement, NWS Boston/Norton, MA

February 11, 2018Barnstable County, Massachusetts

NWS Boston/Norton, MA issued this special weather statement at Feb 11, 2018, 4:42 PM EST for Barnstable County, Massachusetts. It was in force for 33 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: Feb 11, 2018, 4:42 PM EST (21:42 UTC)
Expired: Feb 11, 2018, 5:15 PM EST
In force: 33 min
Issued by: NWS Boston/Norton, MA

County Barnstable County, MA

The radar

The Boston radar (KBOX), 95 km from the middle of the area, began a volume at 21:45 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, 9.7 hours before the alert went out and 251 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: 417 m above ground
0-6 km bulk shear: 71 kt
0-1 km storm-relative helicity: 14 m²/s²
0-3 km storm-relative helicity: 160 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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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 Feb 11, 4:10 PM EST, 32 minutes earlier.

Area forecast discussion, Feb 11, 4:10 PM EST, 32 minutes before

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Hazardous weather outlook, Feb 11, 4:19 PM EST, 23 minutes before

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In the hours before

Special weather statement, Feb 11, 1:14 PM EST, 3 hours 28 minutes before

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Special weather statement, Feb 11, 3:34 PM EST, 1 hour 8 minutes before

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Local storm report, Feb 11, 3:44 PM EST, 58 minutes before

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Special weather statement, Feb 11, 4:42 PM EST, 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
Feb 10, 8:19 PM EST	Dense Fog Advisory	BOX	Essex, Franklin, Hampden, Hampshire, Middlesex, Worcester	13 hr
Feb 11, 2:45 AM EST	Gale Warning	BOX		25 hr
Feb 11, 1:14 PM EST	Special Weather Statement	BOX	Nantucket	46 min
Feb 11, 3:34 PM EST	Special Weather Statement	BOX	Dukes, Nantucket	41 min
Feb 11, 6:07 PM EST	Dense Fog Advisory	BOX	Dukes, Nantucket	13 hr

Nearby

Special Weather Statements in Massachusetts, 2018 Every special weather statement in 2018

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.