Alert archive / Connecticut / Mesoscale Discussions in 2003

Mesoscale Discussion 1523

June 27, 20034 states

The Storm Prediction Center issued this mesoscale discussion at Jun 27, 2003, 3:55 PM EDT for 4 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jun 27, 2003, 3:55 PM EDT (19:55 UTC)
Expired: Jun 27, 2003, 6:00 PM EDT
In force: 2 hr
Issued by: the Storm Prediction Center

Counties Middlesex County, MA, Norfolk County, MA, Worcester County, MA, Franklin County, ME, Oxford County, ME, Piscataquis County, ME, Somerset County, ME, Belknap County, NH, Carroll County, NH, Hillsborough County, NH, Merrimack County, NH, Rockingham County, NH, Strafford County, NH, Bristol County, RI, Kent County, RI, Providence County, RI

The radar

The Portland,ME radar (KGYX), 82 km from the middle of the area, began a volume at 19:55 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

Gray, ME (KGYX), launched 12:00Z, 7.9 hours before the alert went out and 82 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: 260 J/kg
Mixed-layer CIN: -179 J/kg
Mixed-layer LCL: 1522 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: -3 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
Jun 27, 12:17 PM EDT	Mesoscale Discussion	SPC		2 hr
Jun 27, 1:45 PM EDT	Severe Thunderstorm Watch	SPC	Androscoggin, Aroostook, Cumberland, Franklin, Kennebec, Oxford and 5 more	6 hr

Nearby

Mesoscale Discussions in Connecticut, 2003 Mesoscale Discussions in New Hampshire, 2003 Mesoscale Discussions in Maine, 2003 Every 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.