Alert archive / New Jersey / Mesoscale Discussions in 2015

Mesoscale Discussion 1849

October 9, 20155 states

The Storm Prediction Center issued this mesoscale discussion at Oct 9, 2015, 4:54 PM EDT for 5 states. It was in force for 96 min.

The area

The outline as issued.

The facts

Issued: Oct 9, 2015, 4:54 PM EDT (20:54 UTC)
Expired: Oct 9, 2015, 6:30 PM EDT
In force: 96 min
Issued by: the Storm Prediction Center

All 31 counties

New Castle County, DE, Cecil County, MD, Harford County, MD, Atlantic County, NJ, Burlington County, NJ, Camden County, NJ, Cumberland County, NJ, Essex County, NJ, Gloucester County, NJ, Hudson County, NJ, Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Morris County, NJ, Ocean County, NJ, Salem County, NJ, Somerset County, NJ, Union County, NJ, Warren County, NJ, Kings County, NY, New York County, NY, Queens County, NY, Richmond County, NY, Bucks County, PA, Chester County, PA, Delaware County, PA, Lancaster County, PA, Montgomery County, PA, Northampton County, PA, Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 88 km from the middle of the area, began a volume at 20:56 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

Washington/Dulle, VA (KIAD), launched 12:00Z, 8.9 hours before the alert went out and 205 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: 43 J/kg
Mixed-layer CIN: -181 J/kg
Mixed-layer LCL: 1203 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 114 m²/s²
0-3 km storm-relative helicity: 126 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
Oct 9, 3:11 PM EDT	Mesoscale Discussion	SPC	New Castle	2 hr
Oct 9, 3:34 PM EDT	Severe Thunderstorm Watch	SPC	New Castle	4 hr
Oct 9, 7:40 PM EDT	Mesoscale Discussion	SPC	Sussex	95 min
Oct 9, 2:48 PM EDT	Mesoscale Discussion	SPC	Allegany, Garrett	57 min

Nearby

Mesoscale Discussions in New Jersey, 2015 Mesoscale Discussions in Pennsylvania, 2015 Mesoscale Discussions in New York, 2015 Every mesoscale discussion in 2015

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.