Alert archive / Maine / Mesoscale Discussions in 2004

Mesoscale Discussion 1157

June 9, 200412 counties in Maine; 6 counties in New Hampshire; Essex County, Vermont

The Storm Prediction Center issued this mesoscale discussion at Jun 9, 2004, 3:20 PM EDT for 12 counties in Maine; 6 counties in New Hampshire; Essex County, Vermont. It was in force for 85 min.

The area

The outline as issued.

The facts

Issued: Jun 9, 2004, 3:20 PM EDT (19:20 UTC)
Expired: Jun 9, 2004, 4:45 PM EDT
In force: 85 min
Issued by: the Storm Prediction Center

Counties Androscoggin County, ME, Cumberland County, ME, Franklin County, ME, Hancock County, ME, Kennebec County, ME, Knox County, ME, Lincoln County, ME, Oxford County, ME, Sagadahoc County, ME, Waldo County, ME, Washington County, ME, York County, ME, Belknap County, NH, Carroll County, NH, Coos County, NH, Grafton County, NH, Merrimack County, NH, Strafford County, NH, Essex County, VT

The radar

The Portland,ME radar (KGYX), 15 km from the middle of the area, began a volume at 19:21 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Severe Thunderstorm Watch 419Jun 9, 4:45 PM EDT

The nearest sounding before it

Gray, ME (KGYX), launched 12:00Z, 7.3 hours before the alert went out and 15 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: 47 J/kg
Mixed-layer CIN: -228 J/kg
Mixed-layer LCL: 1497 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 68 m²/s²
0-3 km storm-relative helicity: 35 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 9, 1:04 PM EDT	Mesoscale Discussion	SPC	Androscoggin, Cumberland, Franklin, Hancock, Kennebec, Knox and 8 more	86 min
Jun 9, 1:35 PM EDT	Severe Thunderstorm Watch	SPC	Androscoggin, Cumberland, Franklin, Hancock, Kennebec, Knox and 6 more	5 hr
Jun 9, 4:45 PM EDT	Severe Thunderstorm Watch	SPC	Androscoggin, Cumberland, Franklin, Oxford, York	5 hr
Jun 9, 6:28 PM EDT	Mesoscale Discussion	SPC	Cheshire, Hillsborough, Merrimack, Rockingham, Sullivan	62 min
Jun 9, 6:54 PM EDT	Mesoscale Discussion	SPC	Cheshire, Hillsborough, Merrimack, Rockingham, Sullivan	96 min
Jun 9, 10:11 AM EDT	Mesoscale Discussion	SPC	Addison, Caledonia, Chittenden, Essex, Franklin, Grand Isle and 4 more	2 hr
Jun 9, 11:20 AM EDT	Severe Thunderstorm Watch	SPC	Addison, Chittenden, Franklin, Grand Isle, Lamoille, Orange and 3 more	6 hr
Jun 9, 2:41 PM EDT	Mesoscale Discussion	SPC	Addison, Chittenden, Franklin, Grand Isle, Lamoille, Orange and 3 more	94 min
Jun 9, 4:21 PM EDT	Mesoscale Discussion	SPC	Addison, Chittenden, Franklin, Grand Isle, Lamoille, Orange and 3 more	54 min

Nearby

Mesoscale Discussions in Maine, 2004 Mesoscale Discussions in New Hampshire, 2004 Mesoscale Discussions in Vermont, 2004 Every mesoscale discussion in 2004

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.