Alert archive / Maine / Mesoscale Discussions in 2011

Mesoscale Discussion 1062

June 1, 20114 states

The Storm Prediction Center issued this mesoscale discussion at Jun 1, 2011, 9:43 PM EDT for 4 states. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued: Jun 1, 2011, 9:43 PM EDT (01:43 UTC)
Expired: Jun 1, 2011, 11:15 PM EDT
In force: 92 min
Issued by: the Storm Prediction Center

All 33 counties

Barnstable County, MA, Bristol County, MA, Dukes County, MA, Essex County, MA, Hampden County, MA, Middlesex County, MA, Norfolk County, MA, Plymouth County, MA, Suffolk County, MA, Worcester County, MA, Androscoggin County, ME, Cumberland County, ME, Hancock County, ME, Kennebec County, ME, Knox County, ME, Lincoln County, ME, Oxford County, ME, Penobscot County, ME, Piscataquis County, ME, Sagadahoc County, ME, Somerset County, ME, Waldo County, ME, Washington County, ME, York County, ME, Belknap County, NH, Carroll County, NH, Hillsborough County, NH, Rockingham County, NH, Strafford County, NH, Bristol County, RI, Kent County, RI, Newport County, RI, Providence County, RI

The radar

The Portland,ME radar (KGYX), 73 km from the middle of the area, began a volume at 01:44 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

Gray, ME (KGYX), launched 00:00Z, 1.7 hours before the alert went out and 73 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: 2669 J/kg
Mixed-layer CIN: -55 J/kg
Mixed-layer LCL: 953 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 365 m²/s²
0-3 km storm-relative helicity: 356 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 19.5

Open this sounding in Storm Lab

The text

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

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Nearby

Mesoscale Discussions in Maine, 2011 Mesoscale Discussions in Massachusetts, 2011 Mesoscale Discussions in New Hampshire, 2011 Every mesoscale discussion in 2011

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.