Alert archive / Connecticut / Mesoscale Discussions in 2013

Mesoscale Discussion 2004

November 1, 20134 states

The Storm Prediction Center issued this mesoscale discussion at Nov 1, 2013, 10:39 AM EDT for 4 states. It was in force for 96 min.

The area

The outline as issued.

The facts

Issued: Nov 1, 2013, 10:39 AM EDT (14:39 UTC)
Expired: Nov 1, 2013, 12:15 PM EDT
In force: 96 min
Issued by: the Storm Prediction Center

Counties Worcester County, MA, Atlantic County, NJ, Ocean County, NJ, Suffolk County, NY, Providence County, RI

The radar

The Brookhaven radar (KOKX), 35 km from the middle of the area, began a volume at 14:40 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, 2.7 hours before the alert went out and 35 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: 908 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 334 m²/s²
0-3 km storm-relative helicity: 380 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
Nov 1, 5:41 AM EDT	Mesoscale Discussion	SPC	Hunterdon, Morris, Somerset, Sussex, Warren	94 min
Nov 1, 6:25 AM EDT	Severe Thunderstorm Watch	SPC	Atlantic, Burlington, Camden, Cumberland, Gloucester, Hunterdon and 9 more	5 hr
Nov 1, 8:34 AM EDT	Mesoscale Discussion	SPC	Essex, Hunterdon, Mercer, Middlesex, Morris, Passaic and 3 more	86 min

Nearby

Mesoscale Discussions in Connecticut, 2013 Mesoscale Discussions in New Jersey, 2013 Mesoscale Discussions in Massachusetts, 2013 Every mesoscale discussion in 2013

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.