Alert archive / New York / Mesoscale Discussions in 2019

Mesoscale Discussion 360

April 15, 201914 counties in New York

The Storm Prediction Center issued this mesoscale discussion at Apr 15, 2019, 12:33 AM EDT for 14 counties in New York. It was in force for 117 min.

The area

The outline as issued.

The facts

Issued: Apr 15, 2019, 12:33 AM EDT (04:33 UTC)
Expired: Apr 15, 2019, 2:30 AM EDT
In force: 117 min
Issued by: the Storm Prediction Center
Chance of a watch: 40%

Counties Essex County, NY, Fulton County, NY, Hamilton County, NY, Herkimer County, NY, Jefferson County, NY, Lewis County, NY, Montgomery County, NY, Oneida County, NY, Oswego County, NY, Saratoga County, NY, Schenectady County, NY, St. Lawrence County, NY, Warren County, NY, Washington County, NY

The radar

The Ft Drum radar (KTYX), 56 km from the middle of the area, began a volume at 04:37 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 00:00Z, 4.6 hours before the alert went out and 149 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: 639 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 447 m²/s²
0-3 km storm-relative helicity: 518 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
Apr 14, 9:14 PM EDT	Mesoscale Discussion	SPC	Allegany, Cattaraugus, Chemung, Schuyler, Steuben, Wyoming	61 min
Apr 14, 9:56 PM EDT	Tornado Watch	SPC	Broome, Cayuga, Chemung, Chenango, Cortland, Delaware and 10 more	5 hr
Apr 14, 11:56 PM EDT	Mesoscale Discussion	SPC	Albany, Bronx, Broome, Chemung, Chenango, Columbia and 26 more	2 hr
Apr 15, 1:05 AM EDT	Tornado Watch	SPC	Bronx, Columbia, Dutchess, Greene, Kings, Nassau and 8 more	5 hr
Apr 15, 3:50 AM EDT	Mesoscale Discussion	SPC	Albany, Bronx, Columbia, Dutchess, Greene, Kings and 9 more	55 min

Nearby

Mesoscale Discussions in New York, 2019 Every mesoscale discussion in 2019

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.