Alert archive / New York / Mesoscale Discussions in 2014

Mesoscale Discussion 1241

July 1, 201422 counties in New York; 5 counties in Pennsylvania

The Storm Prediction Center issued this mesoscale discussion at Jul 1, 2014, 11:45 AM EDT for 22 counties in New York; 5 counties in Pennsylvania. It was in force for 90 min.

The area

The outline as issued.

The facts

Issued: Jul 1, 2014, 11:45 AM EDT (15:45 UTC)
Expired: Jul 1, 2014, 1:15 PM EDT
In force: 90 min
Issued by: the Storm Prediction Center
Chance of a watch: 40%

All 27 counties

Allegany County, NY, Cattaraugus County, NY, Cayuga County, NY, Chemung County, NY, Cortland County, NY, Erie County, NY, Genesee County, NY, Jefferson 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, Tioga County, NY, Tompkins County, NY, Wayne County, NY, Wyoming County, NY, Yates County, NY, Crawford County, PA, McKean County, PA, Potter County, PA, Tioga County, PA, Warren County, PA

The radar

The Buffalo radar (KBUF), 98 km from the middle of the area, began a volume at 15:47 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

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 3.8 hours before the alert went out and 95 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: 361 J/kg
Mixed-layer CIN: -46 J/kg
Mixed-layer LCL: 893 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 134 m²/s²
0-3 km storm-relative helicity: 110 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

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
Jul 1, 3:22 PM EDT	Mesoscale Discussion	SPC	Broome, Cayuga, Chemung, Chenango, Cortland, Delaware and 19 more	53 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.