Alert archive / Vermont / Mesoscale Discussions in 2008

Mesoscale Discussion 2114

August 18, 2008Clinton County, Franklin County, New York; 6 counties in Vermont

The Storm Prediction Center issued this mesoscale discussion at Aug 18, 2008, 6:36 PM EDT for Clinton County, Franklin County, New York; 6 counties in Vermont. It was in force for 84 min.

The area

The outline as issued.

The facts

Issued: Aug 18, 2008, 6:36 PM EDT (22:36 UTC)
Expired: Aug 18, 2008, 8:00 PM EDT
In force: 84 min
Issued by: the Storm Prediction Center

Counties Clinton County, NY, Franklin County, NY, Chittenden County, VT, Franklin County, VT, Grand Isle County, VT, Lamoille County, VT, Orleans County, VT, Washington County, VT

The radar

The Burlington radar (KCXX), 26 km from the middle of the area, began a volume at 22:37 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

Albany, NY (KALY), launched 12:00Z, 10.6 hours before the alert went out and 217 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: 71 J/kg
Mixed-layer CIN: -68 J/kg
Mixed-layer LCL: 877 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 56 m²/s²
0-3 km storm-relative helicity: 82 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
Aug 18, 1:17 PM EDT	Mesoscale Discussion	SPC	Clinton, Essex, Franklin, Hamilton, Herkimer, Jefferson and 3 more	88 min
Aug 18, 3:12 PM EDT	Severe Thunderstorm Watch	SPC	Albany, Broome, Cayuga, Chemung, Chenango, Clinton and 28 more	7 hr

Nearby

Mesoscale Discussions in Vermont, 2008 Mesoscale Discussions in New York, 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.