Alert archive / New York / Mesoscale Discussions in 2011

Mesoscale Discussion 2117

September 4, 201110 counties in New York

The Storm Prediction Center issued this mesoscale discussion at Sep 4, 2011, 6:22 AM EDT for 10 counties in New York. It was in force for 83 min.

The area

The outline as issued.

The facts

Issued: Sep 4, 2011, 6:22 AM EDT (10:22 UTC)
Expired: Sep 4, 2011, 7:45 AM EDT
In force: 83 min
Issued by: the Storm Prediction Center

Counties Cayuga County, NY, Jefferson County, NY, Lewis County, NY, Oneida County, NY, Onondaga County, NY, Ontario County, NY, Oswego County, NY, Seneca County, NY, Wayne County, NY, Yates County, NY

The radar

The Ft Drum radar (KTYX), 71 km from the middle of the area, began a volume at 10:25 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 00:00Z, 10.4 hours before the alert went out and 195 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: 889 J/kg
Mixed-layer CIN: -92 J/kg
Mixed-layer LCL: 1459 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 86 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
Sep 4, 3:07 AM EDT	Mesoscale Discussion	SPC	Allegany, Cattaraugus, Cayuga, Erie, Genesee, Livingston and 8 more	83 min
Sep 4, 3:26 AM EDT	Severe Thunderstorm Watch	SPC	Allegany, Cattaraugus, Cayuga, Chautauqua, Erie, Genesee and 16 more	4 hr
Sep 4, 1:33 PM EDT	Mesoscale Discussion	SPC	Broome, Chemung, Chenango, Cortland, Delaware, Fulton and 13 more	87 min
Sep 4, 2:43 PM EDT	Severe Thunderstorm Watch	SPC	Albany, Broome, Cayuga, Chemung, Chenango, Clinton and 30 more	8 hr
Sep 4, 6:06 PM EDT	Mesoscale Discussion	SPC	Albany, Broome, Cayuga, Chemung, Chenango, Clinton and 30 more	54 min

Nearby

Mesoscale Discussions in New York, 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.