Alert archive / Vermont / Mesoscale Discussions in 2008

Mesoscale Discussion 129

February 1, 20088 counties in Maine; 6 counties in New Hampshire; 10 counties in Vermont

The Storm Prediction Center issued this mesoscale discussion at Feb 1, 2008, 7:33 PM EST for 8 counties in Maine; 6 counties in New Hampshire; 10 counties in Vermont. It was in force for 4 hr.

The area

The outline as issued.

The facts

Issued: Feb 1, 2008, 7:33 PM EST (00:33 UTC)
Expired: Feb 1, 2008, 11:30 PM EST
In force: 4 hr
Issued by: the Storm Prediction Center

All 24 counties

Androscoggin County, ME, Aroostook County, ME, Franklin County, ME, Kennebec County, ME, Oxford County, ME, Penobscot County, ME, Piscataquis County, ME, Somerset County, ME, Belknap County, NH, Carroll County, NH, Coos County, NH, Grafton County, NH, Merrimack County, NH, Sullivan County, NH, Addison County, VT, Caledonia County, VT, Chittenden County, VT, Essex County, VT, Lamoille County, VT, Orange County, VT, Orleans County, VT, Rutland County, VT, Washington County, VT, Windsor County, VT

The radar

The Portland,ME radar (KGYX), 121 km from the middle of the area, began a volume at 00:37 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

Caribou, ME (KCAR), launched 00:00Z, 0.6 hours before the alert went out and 283 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: 586 m above ground
0-6 km bulk shear: 86 kt
0-1 km storm-relative helicity: 390 m²/s²
0-3 km storm-relative helicity: 687 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
Feb 2, 1:14 AM EST	Mesoscale Discussion	SPC	Aroostook, Franklin, Kennebec, Penobscot, Piscataquis, Somerset	4 hr
Feb 2, 1:16 AM EST	Mesoscale Discussion	SPC	Aroostook, Franklin, Kennebec, Penobscot, Piscataquis, Somerset	4 hr

Nearby

Mesoscale Discussions in Vermont, 2008 Mesoscale Discussions in Maine, 2008 Mesoscale Discussions in New Hampshire, 2008 Every mesoscale discussion in 2008

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.