Alert archive / Maine / Severe Thunderstorm Watches in 2004

Severe Thunderstorm Watch 416

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

The Storm Prediction Center issued this severe thunderstorm watch at Jun 9, 2004, 1:35 PM EDT for 12 counties in Maine; 6 counties in New Hampshire; Caledonia County, Essex County, Vermont. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued: Jun 9, 2004, 1:35 PM EDT (17:35 UTC)
Expired: Jun 9, 2004, 7:00 PM EDT
In force: 5 hr
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, Caledonia County, VT, Essex County, VT

The radar

The Portland,ME radar (KGYX), 41 km from the middle of the area, began a volume at 17:37 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.

Warnings issued inside it

5 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
Jun 9, 1:56 PM EDT	Severe Thunderstorm Warning	BTV	Essex	49 min
Jun 9, 2:06 PM EDT	Severe Thunderstorm Warning	GYX	Carroll, Coos, Grafton	24 min
Jun 9, 2:26 PM EDT	Severe Thunderstorm Warning	GYX	Oxford	49 min
Jun 9, 5:07 PM EDT	Severe Thunderstorm Warning	GYX	Grafton	38 min
Jun 9, 6:00 PM EDT	Severe Thunderstorm Warning	GYX	Belknap, Merrimack	45 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Gray, ME (KGYX), launched 12:00Z, 5.6 hours before the alert went out and 41 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

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, 3:20 PM EDT	Mesoscale Discussion	SPC	Androscoggin, Cumberland, Franklin, Hancock, Kennebec, Knox and 6 more	85 min
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

Severe Thunderstorm Watches in Maine, 2004 Severe Thunderstorm Watches in New Hampshire, 2004 Severe Thunderstorm Watches in Vermont, 2004 Every severe thunderstorm watch 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.