Alert archive / Vermont / Mesoscale Discussions in 2010

Mesoscale Discussion 813

June 5, 20104 states

The Storm Prediction Center issued this mesoscale discussion at Jun 5, 2010, 12:17 PM EDT for 4 states. It was in force for 58 min.

The area

The outline as issued.

The facts

Issued: Jun 5, 2010, 12:17 PM EDT (16:17 UTC)
Expired: Jun 5, 2010, 1:15 PM EDT
In force: 58 min
Issued by: the Storm Prediction Center

All 23 counties

Berkshire County, MA, Franklin County, MA, Hampshire County, MA, Worcester County, MA, Belknap County, NH, Cheshire County, NH, Grafton County, NH, Hillsborough County, NH, Merrimack County, NH, Sullivan County, NH, Columbia County, NY, Rensselaer County, NY, Washington County, NY, Addison County, VT, Bennington County, VT, Caledonia County, VT, Chittenden County, VT, Lamoille County, VT, Orange County, VT, Rutland County, VT, Washington County, VT, Windham County, VT, Windsor County, VT

The radar

The Albany radar (KENX), 120 km from the middle of the area, began a volume at 16:20 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 4.3 hours before the alert went out and 98 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: 100 J/kg
Mixed-layer CIN: -118 J/kg
Mixed-layer LCL: 885 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 126 m²/s²
0-3 km storm-relative helicity: 136 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 5, 1:00 PM EDT	Tornado Watch	SPC	Berkshire	7 hr
Jun 5, 1:42 PM EDT	Tornado Watch	SPC	Bristol, Essex, Franklin, Hampden, Hampshire, Middlesex and 4 more	6 hr
Jun 5, 3:12 PM EDT	Mesoscale Discussion	SPC	Berkshire, Franklin, Hampden, Hampshire, Norfolk, Worcester	63 min
Jun 5, 7:30 PM EDT	Mesoscale Discussion	SPC	Essex, Hampden, Middlesex, Suffolk, Worcester	60 min

Nearby

Mesoscale Discussions in Vermont, 2010 Mesoscale Discussions in New Hampshire, 2010 Mesoscale Discussions in Massachusetts, 2010 Every mesoscale discussion in 2010

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.