Alert archive / New York / Mesoscale Discussions in 2015

Mesoscale Discussion 1783

September 9, 201531 counties in New York; 11 counties in Vermont

The Storm Prediction Center issued this mesoscale discussion at Sep 9, 2015, 11:07 AM EDT for 31 counties in New York; 11 counties in Vermont. It was in force for 83 min.

The area

The outline as issued.

The facts

Issued: Sep 9, 2015, 11:07 AM EDT (15:07 UTC)
Expired: Sep 9, 2015, 12:30 PM EDT
In force: 83 min
Issued by: the Storm Prediction Center
Chance of a watch: 20%

All 42 counties

Allegany County, NY, Cattaraugus County, NY, Cayuga County, NY, Chautauqua County, NY, Clinton County, NY, Cortland County, NY, Essex County, NY, Franklin County, NY, Fulton County, NY, Genesee County, NY, Hamilton County, NY, Herkimer County, NY, Jefferson County, NY, Lewis County, NY, Livingston County, NY, Madison County, NY, Monroe County, NY, Oneida County, NY, Onondaga County, NY, Ontario County, NY, Oswego County, NY, Schuyler County, NY, Seneca County, NY, St. Lawrence County, NY, Steuben County, NY, Tompkins County, NY, Warren County, NY, Washington County, NY, Wayne County, NY, Wyoming County, NY, Yates County, NY, Addison 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, Windsor County, VT

The radar

The Ft Drum radar (KTYX), 55 km from the middle of the area, began a volume at 15:10 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, 3.1 hours before the alert went out and 199 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: 11 J/kg
Mixed-layer CIN: -199 J/kg
Mixed-layer LCL: 1316 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 136 m²/s²
0-3 km storm-relative helicity: 112 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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Nearby

Mesoscale Discussions in New York, 2015 Mesoscale Discussions in Vermont, 2015 Every mesoscale discussion in 2015

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.