Alert archive / New York / Mesoscale Discussions in 2011

Mesoscale Discussion 2127

September 4, 201117 counties in New York; 16 counties in Pennsylvania; 12 counties in Vermont

The Storm Prediction Center issued this mesoscale discussion at Sep 4, 2011, 8:35 PM EDT for 17 counties in New York; 16 counties in Pennsylvania; 12 counties in Vermont. It was in force for 55 min.

The area

The outline as issued.

The facts

Issued: Sep 4, 2011, 8:35 PM EDT (00:35 UTC)
Expired: Sep 4, 2011, 9:30 PM EDT
In force: 55 min
Issued by: the Storm Prediction Center

All 45 counties

Albany County, NY, Broome County, NY, Chenango County, NY, Delaware County, NY, Fulton County, NY, Greene County, NY, Montgomery County, NY, Otsego County, NY, Rensselaer County, NY, Saratoga County, NY, Schenectady County, NY, Schoharie County, NY, Sullivan County, NY, Tioga County, NY, Ulster County, NY, Warren County, NY, Washington County, NY, Bradford County, PA, Clinton County, PA, Columbia County, PA, Lackawanna County, PA, Luzerne County, PA, Lycoming County, PA, Montour County, PA, Northumberland County, PA, Pike County, PA, Snyder County, PA, Sullivan County, PA, Susquehanna County, PA, Tioga County, PA, Union County, PA, Wayne County, PA, Wyoming County, PA, Addison County, VT, Bennington County, VT, Caledonia County, VT, Chittenden County, VT, Essex 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), 82 km from the middle of the area, began a volume at 00:37 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 00:00Z, 0.6 hours before the alert went out and 114 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: 311 J/kg
Mixed-layer CIN: -122 J/kg
Mixed-layer LCL: 1307 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 14 m²/s²
0-3 km storm-relative helicity: 63 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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Nearby

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