Alert archive / Massachusetts / Winter Weather Advisories in 2012

Winter Weather Advisory 18, NWS Boston/Norton, MA

December 26, 2012Essex County, Middlesex County, Worcester County, Massachusetts; Providence County, Rhode Island; Capitol Planning Region, Northeastern Connecticut Planning Region, Connecticut

NWS Boston/Norton, MA issued this winter weather advisory at Dec 26, 2012, 5:13 AM EST for Essex County, Middlesex County, Worcester County, Massachusetts; Providence County, Rhode Island; Capitol Planning Region, Northeastern Connecticut Planning Region, Connecticut. It took effect at Dec 26, 2012, 7:00 PM EST. It was in force for 10 hr.

The area

The counties it named.

The facts

Issued: Dec 26, 2012, 5:13 AM EST (10:13 UTC)
In effect from: Dec 26, 2012, 7:00 PM EST
Expired: Dec 27, 2012, 4:51 AM EST
In force: 10 hr
Issued by: NWS Boston/Norton, MA

Counties Capitol Planning Region, CT, Northeastern Connecticut Planning Region, CT, Essex County, MA, Middlesex County, MA, Worcester County, MA, Providence County, RI

The radar

The Boston radar (KBOX), 53 km from the middle of the area, began a volume at 10:10 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 00:00Z, 10.2 hours before the alert went out and 173 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: 820 m above ground
0-6 km bulk shear: 67 kt
0-1 km storm-relative helicity: -159 m²/s²
0-3 km storm-relative helicity: 99 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 winter weather 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 winter weather advisory went out at Dec 26, 4:33 AM EST, 40 minutes earlier.

Area forecast discussion, Dec 26, 4:33 AM EST, 40 minutes before

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Hazardous weather outlook, Dec 26, 4:54 AM EST, 19 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
Dec 26, 3:51 PM EST	Coastal Flood Advisory	BOX	Barnstable, Bristol, Dukes, Essex, Nantucket, Norfolk and 2 more	20 hr
Dec 26, 4:10 PM EST	High Wind Warning	BOX	Barnstable, Bristol, Dukes, Essex, Nantucket, Norfolk and 1 more	19 hr
Dec 26, 4:10 PM EST	Wind Advisory	BOX	Bristol, Middlesex, Norfolk, Plymouth, Suffolk	19 hr

Nearby

Winter Weather Advisories in Massachusetts, 2012 Winter Weather Advisories in Connecticut, 2012 Winter Weather Advisories in Rhode Island, 2012 Every winter weather advisory in 2012

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.