Alert archive / Vermont / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 24, NWS Burlington, VT

June 26, 2009Caledonia County, Lamoille County, Orleans County, Vermont

NWS Burlington, VT issued this severe thunderstorm warning at Jun 26, 2009, 6:52 PM EDT for Caledonia County, Lamoille County, Orleans County, Vermont. It was in force for 27 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jun 26, 2009, 6:52 PM EDT (22:52 UTC)
Expired: Jun 26, 2009, 7:19 PM EDT
In force: 27 min
Issued by: NWS Burlington, VT
Area: Storm-based polygon

Counties Caledonia County, VT, Lamoille County, VT, Orleans County, VT

The radar

The Burlington radar (KCXX), 68 km from the middle of the area, began a volume at 22:55 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 26, 12:13 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Gray, ME (KGYX), launched 12:00Z, 10.9 hours before the alert went out and 184 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: 457 J/kg
Mixed-layer CIN: -90 J/kg
Mixed-layer LCL: 505 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 70 m²/s²
0-3 km storm-relative helicity: 94 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.2

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Burlington, VT wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 26, 6:44 PM EDT, 8 minutes earlier.

Area forecast discussion, Jun 26, 6:44 PM EDT, 8 minutes before

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Hazardous weather outlook, Jun 26, 6:43 PM EDT, 9 minutes before

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In the hours before

Local storm report, Jun 26, 6:01 PM EDT, 51 minutes before

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Special weather statement, Jun 26, 6:22 PM EDT, 30 minutes before

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Special weather statement, Jun 26, 6:30 PM EDT, 22 minutes before

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Local storm report, Jun 26, 6:39 PM EDT, 13 minutes before

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Local storm report, Jun 26, 6:42 PM EDT, 10 minutes before

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Local storm report, Jun 26, 6:51 PM EDT, 1 minute before

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The office that day

Everything else NWS Burlington, VT issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 25, 9:52 PM EDT	Special Weather Statement	BTV	Orleans	53 min
Jun 25, 10:43 PM EDT	Special Weather Statement	BTV	Essex	62 min
Jun 25, 11:10 PM EDT	Special Weather Statement	BTV	Windsor	65 min
Jun 25, 11:47 PM EDT	Special Weather Statement	BTV	Caledonia, Essex	58 min
Jun 26, 1:52 PM EDT	Special Weather Statement	BTV	Franklin, Grand Isle	53 min
Jun 26, 1:58 PM EDT	Special Weather Statement	BTV	Essex	47 min
Jun 26, 2:51 PM EDT	Severe Thunderstorm Warning	BTV	Franklin	24 min
Jun 26, 3:24 PM EDT	Severe Thunderstorm Warning	BTV	Franklin, Grand Isle	36 min
Jun 26, 3:47 PM EDT	Severe Thunderstorm Warning	BTV	Franklin, Orleans	28 min
Jun 26, 4:14 PM EDT	Severe Thunderstorm Warning	BTV	Franklin, Grand Isle	31 min
Jun 26, 4:29 PM EDT	Areal Flood Advisory	BTV	Franklin, Orleans	3 hr
Jun 26, 4:42 PM EDT	Severe Thunderstorm Warning	BTV	Franklin	33 min
Jun 26, 4:50 PM EDT	Severe Thunderstorm Warning	BTV	Chittenden, Franklin, Grand Isle	25 min
Jun 26, 5:02 PM EDT	Severe Thunderstorm Warning	BTV	Addison, Chittenden, Franklin, Grand Isle	43 min
Jun 26, 5:06 PM EDT	Severe Thunderstorm Warning	BTV	Franklin	24 min
Jun 26, 5:13 PM EDT	Severe Thunderstorm Warning	BTV	Chittenden, Franklin, Grand Isle	47 min
Jun 26, 5:40 PM EDT	Severe Thunderstorm Warning	BTV	Addison, Chittenden, Franklin, Lamoille	50 min
Jun 26, 6:05 PM EDT	Severe Thunderstorm Warning	BTV	Addison, Rutland	55 min
Jun 26, 6:22 PM EDT	Special Weather Statement	BTV	Lamoille, Orleans, Washington	53 min
Jun 26, 6:30 PM EDT	Special Weather Statement	BTV	Addison	60 min
Jun 26, 7:26 PM EDT	Special Weather Statement	BTV	Orleans	64 min
Jun 26, 7:35 PM EDT	Special Weather Statement	BTV	Orange, Rutland	55 min
Jun 26, 7:36 PM EDT	Areal Flood Advisory	BTV	Franklin, Lamoille, Orleans	2 hr
Jun 26, 1:15 PM EDT	Special Weather Statement	BTV	St. Lawrence	75 min
Jun 26, 2:03 PM EDT	Severe Thunderstorm Warning	BTV	St. Lawrence	57 min
Jun 26, 2:28 PM EDT	Severe Thunderstorm Warning	BTV	St. Lawrence	34 min
Jun 26, 2:59 PM EDT	Severe Thunderstorm Warning	BTV	St. Lawrence	42 min
Jun 26, 3:26 PM EDT	Special Weather Statement	BTV	St. Lawrence	64 min
Jun 26, 3:32 PM EDT	Severe Thunderstorm Warning	BTV	St. Lawrence	32 min
Jun 26, 4:09 PM EDT	Special Weather Statement	BTV	Franklin	36 min
Jun 26, 4:17 PM EDT	Severe Thunderstorm Warning	BTV	Clinton, Essex, Franklin	45 min
Jun 26, 4:53 PM EDT	Severe Thunderstorm Warning	BTV	Clinton, Essex	52 min

Nearby

Severe Thunderstorm Warnings in Vermont, 2009 Every severe thunderstorm warning in 2009

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.