Alert archive / Vermont / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 31, NWS Burlington, VT

August 4, 2015Orange County, Rutland County, Windsor County, Vermont

NWS Burlington, VT issued this severe thunderstorm warning at Aug 4, 2015, 2:45 PM EDT for Orange County, Rutland County, Windsor County, Vermont. It was in force for 60 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: Aug 4, 2015, 2:45 PM EDT (18:45 UTC)
Expired: Aug 4, 2015, 3:45 PM EDT
In force: 60 min
Issued by: NWS Burlington, VT
Area: Storm-based polygon

Counties Orange County, VT, Rutland County, VT, Windsor County, VT

The radar

The Burlington radar (KCXX), 96 km from the middle of the area, began a volume at 18:47 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
Aug 4, 12:18 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 6.8 hours before the alert went out and 149 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: 163 J/kg
Mixed-layer CIN: -137 J/kg
Mixed-layer LCL: 1132 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 34 m²/s²
0-3 km storm-relative helicity: 108 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

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 Aug 4, 1:20 PM EDT, 1 hour 25 minutes earlier.

Area forecast discussion, Aug 4, 1:20 PM EDT, 1 hour 25 minutes before

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Hazardous weather outlook, Aug 4, 2:15 PM EDT, 30 minutes before

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In the hours before

Local storm report, Aug 4, 12:59 PM EDT, 1 hour 46 minutes before

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Local storm report, Aug 4, 1:00 PM EDT, 1 hour 45 minutes before

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Local storm report, Aug 4, 1:27 PM EDT, 1 hour 18 minutes before

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Local storm report, Aug 4, 1:34 PM EDT, 1 hour 11 minutes before

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Local storm report, Aug 4, 1:35 PM EDT, 1 hour 10 minutes before

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Special weather statement, Aug 4, 1:46 PM EDT, 59 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
Aug 3, 8:11 PM EDT	Special Weather Statement	BTV	Essex	34 min
Aug 4, 11:11 AM EDT	Special Weather Statement	BTV	Chittenden	34 min
Aug 4, 11:49 AM EDT	Special Weather Statement	BTV	Addison, Washington	56 min
Aug 4, 11:54 AM EDT	Severe Thunderstorm Warning	BTV	Addison, Chittenden, Orange, Washington	66 min
Aug 4, 12:09 PM EDT	Special Weather Statement	BTV	Essex	51 min
Aug 4, 12:13 PM EDT	Severe Thunderstorm Warning	BTV	Addison	35 min
Aug 4, 12:47 PM EDT	Special Weather Statement	BTV	Caledonia, Essex, Orange, Washington	58 min
Aug 4, 1:46 PM EDT	Special Weather Statement	BTV	Orange, Windsor	59 min
Aug 4, 5:28 PM EDT	Special Weather Statement	BTV	Windsor	47 min
Aug 4, 7:29 AM EDT	Special Weather Statement	BTV	Franklin	46 min
Aug 4, 7:55 AM EDT	Special Weather Statement	BTV	Clinton	35 min

Nearby

Severe Thunderstorm Warnings in Vermont, 2015 Every severe thunderstorm warning in 2015

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.