Alert archive / Maine / Mesoscale Discussions in 2013

Mesoscale Discussion 935

June 2, 20135 states

The Storm Prediction Center issued this mesoscale discussion at Jun 2, 2013, 1:52 PM EDT for 5 states. It was in force for 83 min.

The area

The outline as issued.

The facts

Issued: Jun 2, 2013, 1:52 PM EDT (17:52 UTC)
Expired: Jun 2, 2013, 3:15 PM EDT
In force: 83 min
Issued by: the Storm Prediction Center

All 33 counties

Berkshire County, MA, Franklin County, MA, Hampden County, MA, Hampshire County, MA, 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, Cheshire County, NH, Coos County, NH, Grafton County, NH, Hillsborough County, NH, Merrimack County, NH, Sullivan County, NH, Columbia County, NY, Dutchess County, NY, Rensselaer County, NY, Ulster County, NY, Washington County, NY, Bennington County, VT, Caledonia County, VT, Essex County, VT, Orange County, VT, Rutland County, VT, Washington County, VT, Windham County, VT, Windsor County, VT

The radar

The Portland,ME radar (KGYX), 124 km from the middle of the area, began a volume at 17:52 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 12:00Z, 5.9 hours before the alert went out and 124 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: 462 J/kg
Mixed-layer CIN: -121 J/kg
Mixed-layer LCL: 1196 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 38 m²/s²
0-3 km storm-relative helicity: 95 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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
Jun 2, 11:33 AM EDT	Severe Thunderstorm Watch	SPC	Capitol Planning Region, Northwest Hills Planning Region	8 hr
Jun 2, 4:26 PM EDT	Mesoscale Discussion	SPC		94 min
Jun 2, 6:53 PM EDT	Mesoscale Discussion	SPC		97 min
Jun 2, 10:48 AM EDT	Mesoscale Discussion	SPC	Oxford	2 hr

Nearby

Mesoscale Discussions in Maine, 2013 Mesoscale Discussions in New Hampshire, 2013 Mesoscale Discussions in Vermont, 2013 Every mesoscale discussion in 2013

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.