Alert archive / New York / Mesoscale Discussions in 2014

Mesoscale Discussion 960

June 11, 201419 counties in New York; McKean County, Potter County, Pennsylvania

The Storm Prediction Center issued this mesoscale discussion at Jun 11, 2014, 4:49 PM EDT for 19 counties in New York; McKean County, Potter County, Pennsylvania. It was in force for 86 min.

The area

The outline as issued.

The facts

Issued: Jun 11, 2014, 4:49 PM EDT (20:49 UTC)
Expired: Jun 11, 2014, 6:15 PM EDT
In force: 86 min
Issued by: the Storm Prediction Center
Chance of a watch: 20%

All 21 counties

Allegany County, NY, Cattaraugus County, NY, Cayuga County, NY, Erie County, NY, Genesee County, NY, Jefferson County, NY, Lewis County, NY, Livingston County, NY, Monroe County, NY, Onondaga County, NY, Ontario County, NY, Orleans County, NY, Oswego County, NY, Schuyler County, NY, Seneca County, NY, Steuben County, NY, Wayne County, NY, Wyoming County, NY, Yates County, NY, McKean County, PA, Potter County, PA

The radar

The Buffalo radar (KBUF), 87 km from the middle of the area, began a volume at 20:50 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

Pittsburgh, PA (KAGC), launched 12:00Z, 8.8 hours before the alert went out and 335 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1314 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 134 m²/s²
0-3 km storm-relative helicity: 163 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
Jun 11, 12:25 PM EDT	Mesoscale Discussion	SPC	Greene	2 hr
Jun 11, 1:32 PM EDT	Mesoscale Discussion	SPC	Adams, Allegheny, Armstrong, Bedford, Butler, Fayette and 5 more	118 min
Jun 11, 2:59 PM EDT	Tornado Watch	SPC	Adams, Allegheny, Armstrong, Beaver, Bedford, Blair and 14 more	6 hr

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.