Alert archive / New Jersey / Mesoscale Discussions in 2008

Mesoscale Discussion 2238

September 9, 20087 states

The Storm Prediction Center issued this mesoscale discussion at Sep 9, 2008, 12:11 PM EDT for 7 states. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued: Sep 9, 2008, 12:11 PM EDT (16:11 UTC)
Expired: Sep 9, 2008, 1:45 PM EDT
In force: 94 min
Issued by: the Storm Prediction Center

All 44 counties

Kent County, DE, New Castle County, DE, Sussex County, DE, Bristol County, MA, Dukes County, MA, Middlesex County, MA, Norfolk County, MA, Plymouth County, MA, Suffolk County, MA, Worcester County, MA, Anne Arundel County, MD, Caroline County, MD, Cecil County, MD, Kent County, MD, Prince George's County, MD, Queen Anne's County, MD, Talbot County, MD, Atlantic County, NJ, Burlington County, NJ, Camden County, NJ, Cape May County, NJ, Cumberland County, NJ, Gloucester County, NJ, Hudson County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Ocean County, NJ, Salem County, NJ, Union County, NJ, Bronx County, NY, Kings County, NY, Nassau County, NY, New York County, NY, Queens County, NY, Richmond County, NY, Suffolk County, NY, Delaware County, PA, Philadelphia County, PA, Bristol County, RI, Kent County, RI, Newport County, RI, Providence County, RI, Washington County, RI

The radar

The Brookhaven radar (KOKX), 32 km from the middle of the area, began a volume at 16:11 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

Brookhaven, NY (KOKX), launched 12:00Z, 4.2 hours before the alert went out and 31 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: 34 J/kg
Mixed-layer CIN: -228 J/kg
Mixed-layer LCL: 1158 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 159 m²/s²
0-3 km storm-relative helicity: 136 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.9

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 9, 8:35 AM EDT	Mesoscale Discussion	SPC		115 min
Sep 9, 9:33 AM EDT	Severe Thunderstorm Watch	SPC	Greater Bridgeport Planning Region, Lower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region, Southeastern Connecticut Planning Region	6 hr
Sep 9, 11:39 AM EDT	Mesoscale Discussion	SPC		36 min
Sep 9, 11:40 AM EDT	Severe Thunderstorm Watch	SPC	Northeastern Connecticut Planning Region	3 hr
Sep 9, 2:05 PM EDT	Severe Thunderstorm Watch	SPC	Somerset, Worcester	6 hr

Nearby

Mesoscale Discussions in New Jersey, 2008 Mesoscale Discussions in Connecticut, 2008 Mesoscale Discussions in Maryland, 2008 Every mesoscale discussion in 2008

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.