Alert archive / Connecticut / Mesoscale Discussions in 2005

Mesoscale Discussion 1895

July 27, 20054 states

The Storm Prediction Center issued this mesoscale discussion at Jul 27, 2005, 7:30 PM EDT for 4 states. It was in force for 30 min.

The area

The outline as issued.

The facts

Issued: Jul 27, 2005, 7:30 PM EDT (23:30 UTC)
Expired: Jul 27, 2005, 8:00 PM EDT
In force: 30 min
Issued by: the Storm Prediction Center

Counties Essex County, MA, Middlesex County, MA, Norfolk County, MA, Suffolk County, MA, Worcester County, MA, Rockingham County, NH, Suffolk County, NY, Kent County, RI, Providence County, RI

The radar

The Boston radar (KBOX), 36 km from the middle of the area, began a volume at 23:30 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, 11.5 hours before the alert went out and 184 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: 1290 J/kg
Mixed-layer CIN: -122 J/kg
Mixed-layer LCL: 1099 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 83 m²/s²
0-3 km storm-relative helicity: 78 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.8

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
Jul 27, 11:55 AM EDT	Mesoscale Discussion	SPC		2 hr
Jul 27, 1:10 PM EDT	Severe Thunderstorm Watch	SPC		7 hr
Jul 27, 3:08 PM EDT	Mesoscale Discussion	SPC		2 hr
Jul 27, 5:42 PM EDT	Mesoscale Discussion	SPC		93 min
Jul 27, 1:50 PM EDT	Severe Thunderstorm Watch	SPC	Bronx, Kings, Nassau, New York, Queens, Richmond	8 hr
Jul 27, 3:35 PM EDT	Mesoscale Discussion	SPC	Kings, Nassau, Queens, Richmond	115 min
Jul 27, 6:32 PM EDT	Mesoscale Discussion	SPC	Bronx, Kings, Nassau, New York, Queens, Richmond	88 min

Nearby

Mesoscale Discussions in Connecticut, 2005 Mesoscale Discussions in Massachusetts, 2005 Mesoscale Discussions in Rhode Island, 2005 Every mesoscale discussion in 2005

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.