Alert archive / Vermont / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 2, NWS Burlington, VT

May 4, 20106 counties in Vermont; Essex County, New York

NWS Burlington, VT issued this severe thunderstorm warning at May 4, 2010, 6:00 PM EDT for 6 counties in Vermont; Essex County, New York. It was in force for 45 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: May 4, 2010, 6:00 PM EDT (22:00 UTC)
Expired: May 4, 2010, 6:45 PM EDT
In force: 45 min
Issued by: NWS Burlington, VT
Area: Storm-based polygon

Counties Essex County, NY, Addison County, VT, Chittenden County, VT, Franklin County, VT, Grand Isle County, VT, Lamoille County, VT, Washington County, VT

The radar

The Burlington radar (KCXX), 11 km from the middle of the area, began a volume at 22:00 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
May 4, 1:24 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 10.0 hours before the alert went out and 205 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1395 m above ground
0-6 km bulk shear: 67 kt
0-1 km storm-relative helicity: 19 m²/s²
0-3 km storm-relative helicity: 58 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 May 4, 3:31 PM EDT, 2 hours 29 minutes earlier.

Area forecast discussion, May 4, 3:31 PM EDT, 2 hours 29 minutes before

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Hazardous weather outlook, May 4, 1:43 PM EDT, 4 hours 17 minutes before

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In the hours before

Special weather statement, May 4, 2:55 PM EDT, 3 hours 5 minutes before

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Special weather statement, May 4, 3:28 PM EDT, 2 hours 32 minutes before

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Special weather statement, May 4, 4:01 PM EDT, 1 hour 59 minutes before

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Special weather statement, May 4, 4:34 PM EDT, 1 hour 26 minutes before

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Special weather statement, May 4, 5:03 PM EDT, 57 minutes before

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Special weather statement, May 4, 5:51 PM EDT, 9 minutes 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
May 4, 10:56 AM EDT	Special Weather Statement	BTV	Addison	49 min
May 4, 11:41 AM EDT	Special Weather Statement	BTV	Addison	49 min
May 4, 12:28 PM EDT	Special Weather Statement	BTV	Chittenden	47 min
May 4, 1:04 PM EDT	Severe Thunderstorm Warning	BTV	Caledonia, Chittenden, Franklin, Lamoille, Orleans, Washington	41 min
May 4, 3:28 PM EDT	Special Weather Statement	BTV	Rutland, Windsor	62 min
May 4, 4:34 PM EDT	Special Weather Statement	BTV	Windsor	56 min
May 4, 5:03 PM EDT	Special Weather Statement	BTV	Grand Isle	57 min
May 4, 5:51 PM EDT	Special Weather Statement	BTV	Chittenden, Lamoille, Washington	54 min
May 4, 6:21 PM EDT	Special Weather Statement	BTV	Addison	54 min
May 4, 6:40 PM EDT	Special Weather Statement	BTV	Lamoille, Orleans, Washington	65 min
May 4, 7:45 PM EDT	Special Weather Statement	BTV	Caledonia, Essex, Orleans	60 min
May 4, 2:55 PM EDT	Special Weather Statement	BTV	St. Lawrence	65 min
May 4, 4:01 PM EDT	Special Weather Statement	BTV	Franklin, St. Lawrence	59 min

Nearby

Severe Thunderstorm Warnings in Vermont, 2010 Severe Thunderstorm Warnings in New York, 2010 Every severe thunderstorm warning in 2010

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.