Alert archive / Maine / Mesoscale Discussions in 2017

Mesoscale Discussion 295

March 14, 20174 states

The Storm Prediction Center issued this mesoscale discussion at Mar 14, 2017, 5:36 PM EDT for 4 states. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Mar 14, 2017, 5:36 PM EDT (21:36 UTC)
Expired: Mar 14, 2017, 11:30 PM EDT
In force: 6 hr
Issued by: the Storm Prediction Center

All 25 counties

Androscoggin County, ME, Aroostook County, ME, Franklin County, ME, Hancock County, ME, Kennebec County, ME, Oxford County, ME, Penobscot County, ME, Piscataquis County, ME, Somerset County, ME, Waldo County, ME, Washington County, ME, Coos County, NH, Clinton County, NY, Essex County, NY, Franklin County, NY, Fulton County, NY, Hamilton County, NY, Herkimer County, NY, Oneida County, NY, Chittenden County, VT, Essex County, VT, Franklin County, VT, Grand Isle County, VT, Lamoille County, VT, Orleans County, VT

The radar

The Portland,ME radar (KGYX), 123 km from the middle of the area, began a volume at 21:39 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 12:00Z, 9.6 hours before the alert went out and 340 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: 651 m above ground
0-6 km bulk shear: 72 kt
0-1 km storm-relative helicity: 293 m²/s²
0-3 km storm-relative helicity: 602 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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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 14, 1:57 PM EDT	Mesoscale Discussion	SPC	Androscoggin, Cumberland, Franklin, Kennebec, Knox, Lincoln and 4 more	5 hr
Mar 14, 9:04 AM EDT	Mesoscale Discussion	SPC	Belknap, Carroll, Cheshire, Grafton, Hillsborough, Merrimack and 3 more	4 hr
Mar 14, 3:22 AM EDT	Mesoscale Discussion	SPC	Albany, Bronx, Broome, Chenango, Columbia, Delaware and 17 more	5 hr

Nearby

Mesoscale Discussions in Maine, 2017 Mesoscale Discussions in New York, 2017 Mesoscale Discussions in Vermont, 2017 Every mesoscale discussion in 2017

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.