Alert archive / Vermont / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 76, NWS Burlington, VT

August 12, 2023Addison County, Rutland County, Windsor County, Vermont; Essex County, New York

NWS Burlington, VT issued this severe thunderstorm warning at Aug 12, 2023, 11:01 PM EDT for Addison County, Rutland County, Windsor County, Vermont; Essex County, New York. It was in force for 44 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 12, 2023, 11:01 PM EDT (03:01 UTC)
Expired: Aug 12, 2023, 11:45 PM EDT
In force: 44 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, Rutland County, VT, Windsor County, VT

The radar

The Burlington radar (KCXX), 76 km from the middle of the area, began a volume at 03:03 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 00:00Z, 3.0 hours before the alert went out and 138 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: 456 J/kg
Mixed-layer CIN: -38 J/kg
Mixed-layer LCL: 1212 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 130 m²/s²
0-3 km storm-relative helicity: 201 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 3.2

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 12, 10:07 PM EDT, 54 minutes earlier.

Area forecast discussion, Aug 12, 10:07 PM EDT, 54 minutes before

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Hazardous weather outlook, Aug 12, 2:34 PM EDT, 8 hours 27 minutes before

Hazardous Weather Outlook
National Weather Service Burlington VT
234 PM EDT Sat Aug 12 2023

NYZ026>031-034-035-087-VTZ001>011-016>021-131845-
Northern St. Lawrence-Northern Franklin-Eastern Clinton-
Southeastern St. Lawrence-Southern Franklin-Western Clinton-
Western Essex-Eastern Essex-Southwestern St. Lawrence-Grand Isle-
Western Franklin-Orleans-Essex-Western Chittenden-Lamoille-Caledonia-
Washington-Western Addison-Orange-Western Rutland-Eastern Franklin-
Eastern Chittenden-Eastern Addison-Eastern Rutland-Western Windsor-
Eastern Windsor-
234 PM EDT Sat Aug 12 2023

This Hazardous Weather Outlook is for northern New York, central
Vermont, northeast Vermont, northwest Vermont and southern Vermont.

.DAY ONE...This afternoon and tonight.

Showers and thunderstorms will continue to overspread the region
this afternoon and evening. A few thunderstorms could be on the
strong, or even possibly severe, side during the afternoon and early
evening hours with gusty winds and hail possible. Brief heavy
rainfall will also be possible with thunderstorms, but no flash
flooding is expected at this time.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Hazardous weather is not expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

In the hours before

Special weather statement, Aug 12, 8:05 PM EDT, 2 hours 56 minutes before

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Local storm report, Aug 12, 8:55 PM EDT, 2 hours 6 minutes before

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Special weather statement, Aug 12, 9:01 PM EDT, 2 hours before

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Special weather statement, Aug 12, 9:03 PM EDT, 1 hour 58 minutes before

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Special weather statement, Aug 12, 9:44 PM EDT, 1 hour 17 minutes before

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Special weather statement, Aug 12, 10:50 PM EDT, 11 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 12, 8:05 PM EDT	Special Weather Statement	BTV	Chittenden	55 min
Aug 12, 8:25 PM EDT	Severe Thunderstorm Warning	BTV	Addison, Chittenden, Lamoille, Washington	35 min
Aug 12, 9:01 PM EDT	Special Weather Statement	BTV	Lamoille	44 min
Aug 12, 9:08 PM EDT	Severe Thunderstorm Warning	BTV	Chittenden, Franklin, Lamoille	40 min
Aug 12, 9:44 PM EDT	Special Weather Statement	BTV	Caledonia	61 min
Aug 12, 10:50 PM EDT	Special Weather Statement	BTV	Rutland	40 min
Aug 12, 11:42 PM EDT	Special Weather Statement	BTV	Addison, Orange, Rutland, Windsor	48 min
Aug 12, 9:03 PM EDT	Special Weather Statement	BTV	Essex	57 min

Nearby

Severe Thunderstorm Warnings in Vermont, 2023 Severe Thunderstorm Warnings in New York, 2023 Every severe thunderstorm warning in 2023

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.