Alert archive / New York / Mesoscale Discussions in 2016

Mesoscale Discussion 1323

July 18, 20168 states

The Storm Prediction Center issued this mesoscale discussion at Jul 18, 2016, 6:49 PM EDT for 8 states. It was in force for 86 min.

The area

The outline as issued.

The facts

Issued: Jul 18, 2016, 6:49 PM EDT (22:49 UTC)
Expired: Jul 18, 2016, 8:15 PM EDT
In force: 86 min
Issued by: the Storm Prediction Center

All 98 counties

Berkshire County, MA, Bristol County, MA, Essex County, MA, Franklin County, MA, Hampden County, MA, Hampshire County, MA, Middlesex County, MA, Norfolk County, MA, Plymouth County, MA, Suffolk County, MA, Worcester County, MA, Androscoggin County, ME, Aroostook County, ME, Cumberland County, ME, Franklin County, ME, Hancock County, ME, Kennebec County, ME, Knox County, ME, Lincoln County, ME, Oxford County, ME, Penobscot County, ME, Piscataquis County, ME, Sagadahoc County, ME, Somerset County, ME, Waldo County, ME, Washington County, ME, York County, ME, Belknap County, NH, Carroll County, NH, Cheshire County, NH, Coos County, NH, Grafton County, NH, Hillsborough County, NH, Merrimack County, NH, Rockingham County, NH, Strafford County, NH, Sullivan County, NH, Bergen County, NJ, Essex County, NJ, Hudson County, NJ, Hunterdon County, NJ, Middlesex County, NJ, Morris County, NJ, Passaic County, NJ, Somerset County, NJ, Sussex County, NJ, Union County, NJ, Warren County, NJ, Albany County, NY, Bronx County, NY, Columbia County, NY, Delaware County, NY, Dutchess County, NY, Greene County, NY, Kings County, NY, Montgomery County, NY, Nassau County, NY, New York County, NY, Orange County, NY, Putnam County, NY, Queens County, NY, Rensselaer County, NY, Richmond County, NY, Rockland County, NY, Saratoga County, NY, Schenectady County, NY, Schoharie County, NY, Suffolk County, NY, Sullivan County, NY, Ulster County, NY, Warren County, NY, Washington County, NY, Westchester County, NY, Carbon County, PA, Lackawanna County, PA, Luzerne County, PA, Monroe County, PA, Northampton County, PA, Pike County, PA, Susquehanna County, PA, Wayne County, PA, Wyoming County, PA, Bristol County, RI, Kent County, RI, Newport County, RI, Providence County, RI, Washington County, RI, Addison County, VT, Bennington County, VT, Caledonia County, VT, Essex County, VT, Lamoille County, VT, Orange County, VT, Orleans County, VT, Rutland County, VT, Washington County, VT, Windham County, VT, Windsor County, VT

The radar

The Portland,ME radar (KGYX), 142 km from the middle of the area, began a volume at 22:53 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

Gray, ME (KGYX), launched 12:00Z, 10.8 hours before the alert went out and 142 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: 24 J/kg
Mixed-layer CIN: -141 J/kg
Mixed-layer LCL: 1173 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 219 m²/s²
0-3 km storm-relative helicity: 216 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 18, 11:40 AM EDT	Mesoscale Discussion	SPC		95 min
Jul 18, 12:05 PM EDT	Severe Thunderstorm Watch	SPC	Greater Bridgeport Planning Region, Capitol Planning Region, Northwest Hills Planning Region, Lower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region, Southeastern Connecticut Planning Region and 1 more	8 hr
Jul 18, 3:21 PM EDT	Mesoscale Discussion	SPC		84 min
Jul 18, 10:32 AM EDT	Mesoscale Discussion	SPC	Androscoggin, Cumberland, Franklin, Kennebec, Lincoln, Oxford and 4 more	118 min
Jul 18, 11:12 AM EDT	Severe Thunderstorm Watch	SPC	Androscoggin, Aroostook, Cumberland, Franklin, Hancock, Kennebec and 10 more	9 hr
Jul 18, 1:42 PM EDT	Severe Thunderstorm Watch	SPC	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 2 more	6 hr
Jul 18, 3:09 PM EDT	Mesoscale Discussion	SPC	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 2 more	66 min
Jul 18, 6:22 PM EDT	Mesoscale Discussion	SPC	Atlantic, Cape May, Cumberland	113 min

Nearby

Mesoscale Discussions in New York, 2016 Mesoscale Discussions in Maine, 2016 Mesoscale Discussions in Massachusetts, 2016 Every mesoscale discussion in 2016

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.