Alert archive / Vermont / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 44, NWS Burlington, VT

July 13, 2020Addison County, Vermont; Essex County, New York

NWS Burlington, VT issued this severe thunderstorm warning at Jul 13, 2020, 12:55 PM EDT for Addison County, Vermont; Essex County, New York. It was in force for 29 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: Jul 13, 2020, 12:55 PM EDT (16:55 UTC)
Expired: Jul 13, 2020, 1:24 PM EDT
In force: 29 min
Issued by: NWS Burlington, VT
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Essex County, NY, Addison County, VT

The radar

The Burlington radar (KCXX), 54 km from the middle of the area, began a volume at 16:57 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 nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 4.9 hours before the alert went out and 157 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: 66 J/kg
Mixed-layer CIN: -55 J/kg
Mixed-layer LCL: 1081 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: -24 m²/s²
0-3 km storm-relative helicity: 46 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 Jul 13, 10:55 AM EDT, 2 hours earlier.

Area forecast discussion, Jul 13, 10:55 AM EDT, 2 hours before

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Hazardous weather outlook, Jul 13, 3:37 AM EDT, 9 hours 18 minutes before

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In the hours before

Special weather statement, Jul 13, 11:42 AM EDT, 1 hour 13 minutes before

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Special weather statement, Jul 13, 12:37 PM EDT, 18 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
Jul 13, 11:42 AM EDT	Special Weather Statement	BTV	Chittenden	33 min
Jul 13, 1:39 PM EDT	Special Weather Statement	BTV	Caledonia	36 min
Jul 13, 12:37 PM EDT	Special Weather Statement	BTV	Essex	23 min
Jul 13, 4:01 PM EDT	Special Weather Statement	BTV	Essex	29 min
Jul 13, 5:57 PM EDT	Special Weather Statement	BTV	St. Lawrence	63 min
Jul 13, 6:00 PM EDT	Special Weather Statement	BTV	St. Lawrence	60 min

Nearby

Severe Thunderstorm Warnings in Vermont, 2020 Severe Thunderstorm Warnings in New York, 2020 Every severe thunderstorm warning in 2020

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.