Alert archive / New York / Mesoscale Discussions in 2014

Mesoscale Discussion 1667

September 2, 201413 counties in New York; Lackawanna County, Wayne County, Pennsylvania

The Storm Prediction Center issued this mesoscale discussion at Sep 2, 2014, 7:43 PM EDT for 13 counties in New York; Lackawanna County, Wayne County, Pennsylvania. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued: Sep 2, 2014, 7:43 PM EDT (23:43 UTC)
Expired: Sep 2, 2014, 9:15 PM EDT
In force: 92 min
Issued by: the Storm Prediction Center

Counties Albany County, NY, Columbia County, NY, Delaware 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, Ulster County, NY, Washington County, NY, Lackawanna County, PA, Wayne County, PA

The radar

The Albany radar (KENX), 44 km from the middle of the area, began a volume at 23:42 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, 11.7 hours before the alert went out and 65 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: 299 J/kg
Mixed-layer CIN: -45 J/kg
Mixed-layer LCL: 852 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 148 m²/s²
0-3 km storm-relative helicity: 180 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

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
Sep 2, 2:25 PM EDT	Mesoscale Discussion	SPC	Allegany, Broome, Cattaraugus, Cayuga, Chemung, Chenango and 26 more	2 hr
Sep 2, 4:39 PM EDT	Severe Thunderstorm Watch	SPC	Broome, Cayuga, Chemung, Chenango, Cortland, Delaware and 11 more	5 hr
Sep 2, 6:29 PM EDT	Mesoscale Discussion	SPC	Bronx, Kings, Nassau, New York, Orange, Putnam and 5 more	91 min
Sep 2, 4:11 PM EDT	Mesoscale Discussion	SPC	Adams, Chester, Lancaster, York	94 min

Nearby

Mesoscale Discussions in New York, 2014 Mesoscale Discussions in Pennsylvania, 2014 Every mesoscale discussion in 2014

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.