Alert archive / Maine / Mesoscale Discussions in 2007

Mesoscale Discussion 2182

December 3, 200710 counties in Maine; 10 counties in New Hampshire; 7 counties in Vermont

The Storm Prediction Center issued this mesoscale discussion at Dec 3, 2007, 6:46 AM EST for 10 counties in Maine; 10 counties in New Hampshire; 7 counties in Vermont. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued: Dec 3, 2007, 6:46 AM EST (11:46 UTC)
Expired: Dec 3, 2007, 9:45 AM EST
In force: 3 hr
Issued by: the Storm Prediction Center

All 27 counties

Androscoggin County, ME, Cumberland County, ME, Franklin County, ME, Kennebec County, ME, Oxford County, ME, Penobscot County, ME, Sagadahoc County, ME, Somerset County, ME, Waldo County, ME, York County, ME, Belknap County, NH, Carroll County, NH, Cheshire County, NH, Coos County, NH, Grafton County, NH, Hillsborough County, NH, Merrimack County, NH, Rockingham County, NH, Strafford County, NH, Sullivan County, NH, Caledonia County, VT, Essex County, VT, Lamoille County, VT, Orange County, VT, Orleans County, VT, Washington County, VT, Windsor County, VT

The radar

The Portland,ME radar (KGYX), 77 km from the middle of the area, began a volume at 11:49 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

Albany, NY (KALY), launched 00:00Z, 11.8 hours before the alert went out and 314 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: 618 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: 225 m²/s²
0-3 km storm-relative helicity: 245 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 3, 1:26 AM EST	Mesoscale Discussion	SPC	Androscoggin, Cumberland, Franklin, Kennebec, Lincoln, Oxford and 2 more	4 hr
Dec 3, 1:30 PM EST	Mesoscale Discussion	SPC	Hancock, Penobscot, Washington	6 hr
Dec 3, 12:15 AM EST	Mesoscale Discussion	SPC	Cheshire, Hillsborough	4 hr

Nearby

Mesoscale Discussions in Maine, 2007 Mesoscale Discussions in New Hampshire, 2007 Mesoscale Discussions in Vermont, 2007 Every mesoscale discussion in 2007

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.