Alert archive / New York / Mesoscale Discussions in 2011

Mesoscale Discussion 1814

August 1, 20114 states

The Storm Prediction Center issued this mesoscale discussion at Aug 1, 2011, 12:07 PM EDT for 4 states. It was in force for 53 min.

The area

The outline as issued.

The facts

Issued: Aug 1, 2011, 12:07 PM EDT (16:07 UTC)
Expired: Aug 1, 2011, 1:00 PM EDT
In force: 53 min
Issued by: the Storm Prediction Center

All 52 counties

Berkshire County, MA, Albany County, NY, Allegany County, NY, Broome County, NY, Chemung County, NY, Chenango County, NY, Columbia County, NY, Cortland County, NY, Delaware County, NY, Essex County, NY, Fulton County, NY, Greene County, NY, Madison County, NY, Montgomery County, NY, Otsego County, NY, Rensselaer County, NY, Saratoga County, NY, Schenectady County, NY, Schoharie County, NY, Schuyler County, NY, Steuben County, NY, Sullivan County, NY, Tioga County, NY, Tompkins County, NY, Ulster County, NY, Warren County, NY, Washington County, NY, Yates County, NY, Bradford County, PA, Cameron County, PA, Lackawanna County, PA, Lycoming County, PA, McKean County, PA, Potter County, PA, Sullivan County, PA, Susquehanna County, PA, Tioga County, PA, Wayne County, PA, Wyoming County, PA, Addison County, VT, Bennington County, VT, Caledonia County, VT, Chittenden County, VT, Franklin County, VT, Grand Isle County, VT, Lamoille County, VT, Orange County, VT, Orleans County, VT, Rutland County, VT, Washington County, VT, Windham County, VT, Windsor County, VT

The radar

The Binghamton radar (KBGM), 91 km from the middle of the area, began a volume at 16:07 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, 4.1 hours before the alert went out and 126 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: 1159 J/kg
Mixed-layer CIN: -92 J/kg
Mixed-layer LCL: 824 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 96 m²/s²
0-3 km storm-relative helicity: 116 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 1, 2:15 PM EDT	Mesoscale Discussion	SPC	Berkshire, Franklin, Hampden, Hampshire, Middlesex, Norfolk and 1 more	90 min
Aug 1, 2:34 PM EDT	Severe Thunderstorm Watch	SPC	Bristol, Essex, Franklin, Hampden, Hampshire, Middlesex and 4 more	6 hr
Aug 1, 6:18 PM EDT	Mesoscale Discussion	SPC	Berkshire, Bristol, Franklin, Hampden, Hampshire, Middlesex and 3 more	57 min
Aug 1, 3:47 AM EDT	Mesoscale Discussion	SPC	Cattaraugus, Chautauqua, Erie, Genesee, Livingston, Monroe and 5 more	58 min
Aug 1, 8:01 AM EDT	Mesoscale Discussion	SPC	Allegany, Cattaraugus, Chautauqua, Chemung, Erie, Genesee and 10 more	89 min
Aug 1, 1:06 PM EDT	Mesoscale Discussion	SPC	Beaver, Lawrence	24 min
Aug 1, 3:22 PM EDT	Mesoscale Discussion	SPC	Adams, Bedford, Berks, Bucks, Chester, Cumberland and 19 more	83 min

Nearby

Mesoscale Discussions in New York, 2011 Mesoscale Discussions in Vermont, 2011 Mesoscale Discussions in Pennsylvania, 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.