Alert archive / Connecticut / Mesoscale Discussions in 2003

Mesoscale Discussion 2472

October 29, 20034 counties in Massachusetts; Suffolk County, New York; 5 counties in Rhode Island

The Storm Prediction Center issued this mesoscale discussion at Oct 29, 2003, 8:33 AM EST for 4 counties in Massachusetts; Suffolk County, New York; 5 counties in Rhode Island. It was in force for 117 min.

The area

The outline as issued.

The facts

Issued
Oct 29, 2003, 8:33 AM EST (13:33 UTC)
Expired
Oct 29, 2003, 10:30 AM EST
In force
117 min
Issued by
the Storm Prediction Center

Counties Bristol County, MA, Hampden County, MA, Hampshire County, MA, Worcester County, MA, Suffolk County, NY, Bristol County, RI, Kent County, RI, Newport County, RI, Providence County, RI, Washington County, RI

The radar

The Boston radar (KBOX), 95 km from the middle of the area, began a volume at 13:36 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 12:00Z, 1.6 hours before the alert went out and 183 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-pSkew-T log-p diagram, Albany, NY at 12:00Z on 2003-10-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Albany, NY at 12:00Z on 2003-10-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 148 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
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
504 m above ground
0-6 km bulk shear
72 kt
0-1 km storm-relative helicity
148 m²/s²
0-3 km storm-relative helicity
424 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.

IssuedProductOfficeCountiesLasted
Oct 29, 10:16 AM ESTMesoscale DiscussionSPCBarnstable, Essex, Middlesex, Nantucket, Norfolk, Plymouth and 1 more89 min

Nearby

Mesoscale Discussions in Connecticut, 2003Mesoscale Discussions in Rhode Island, 2003Mesoscale Discussions in Massachusetts, 2003Every mesoscale discussion in 2003

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.