Alert archive / Maine / Severe Thunderstorm Watches in 2003

Severe Thunderstorm Watch 597

June 27, 200311 counties in Maine; 6 counties in Massachusetts; 6 counties in New Hampshire

The Storm Prediction Center issued this severe thunderstorm watch at Jun 27, 2003, 1:45 PM EDT for 11 counties in Maine; 6 counties in Massachusetts; 6 counties in New Hampshire. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Jun 27, 2003, 1:45 PM EDT (17:45 UTC)
Expired: Jun 27, 2003, 8:00 PM EDT
In force: 6 hr
Issued by: the Storm Prediction Center

All 23 counties

Essex County, MA, Hampden County, MA, Middlesex County, MA, Norfolk County, MA, Suffolk County, MA, Worcester County, MA, Androscoggin County, ME, Aroostook County, ME, Cumberland County, ME, Franklin County, ME, Kennebec County, ME, Oxford County, ME, Penobscot County, ME, Piscataquis County, ME, Sagadahoc County, ME, Somerset County, ME, York County, ME, Belknap County, NH, Carroll County, NH, Hillsborough County, NH, Merrimack County, NH, Rockingham County, NH, Strafford County, NH

The radar

The Portland,ME radar (KGYX), 40 km from the middle of the area, began a volume at 17:45 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

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

Issued	Product	Office	Counties	Lasted
Jun 27, 2:20 PM EDT	Severe Thunderstorm Warning	GYX	Franklin	25 min
Jun 27, 2:44 PM EDT	Severe Thunderstorm Warning	GYX	York	31 min
Jun 27, 3:07 PM EDT	Severe Thunderstorm Warning	GYX	York	23 min
Jun 27, 3:27 PM EDT	Severe Thunderstorm Warning	GYX	Somerset	33 min
Jun 27, 3:35 PM EDT	Severe Thunderstorm Warning	BOX	Essex	40 min
Jun 27, 3:40 PM EDT	Severe Thunderstorm Warning	GYX	Oxford	35 min
Jun 27, 4:59 PM EDT	Severe Thunderstorm Warning	CAR	Penobscot, Piscataquis	61 min
Jun 27, 5:18 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook	57 min
Jun 27, 5:56 PM EDT	Severe Thunderstorm Warning	CAR	Penobscot	34 min
Jun 27, 6:15 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook	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, 5.8 hours before the alert went out and 40 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

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	Androscoggin, Aroostook, Franklin, Kennebec, Oxford, Piscataquis and 2 more	2 hr
Jun 27, 3:55 PM EDT	Mesoscale Discussion	SPC	Franklin, Oxford, Piscataquis, Somerset	2 hr

Nearby

Severe Thunderstorm Watches in Maine, 2003 Severe Thunderstorm Watches in Massachusetts, 2003 Severe Thunderstorm Watches in New Hampshire, 2003 Every severe thunderstorm watch 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.