Alert archive / Vermont / Special Weather Statements in 2021

Special Weather Statement, NWS Burlington, VT

December 4, 2021Franklin County, Grand Isle County, Vermont; Clinton County, New York

NWS Burlington, VT issued this special weather statement at Dec 4, 2021, 4:07 PM EST for Franklin County, Grand Isle County, Vermont; Clinton County, New York. It was in force for 38 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Dec 4, 2021, 4:07 PM EST (21:07 UTC)
Expired: Dec 4, 2021, 4:45 PM EST
In force: 38 min
Issued by: NWS Burlington, VT

Counties Clinton County, NY, Franklin County, VT, Grand Isle County, VT

The radar

The Burlington radar (KCXX), 26 km from the middle of the area, began a volume at 21:07 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, 9.1 hours before the alert went out and 234 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: 978 m above ground
0-6 km bulk shear: 110 kt
0-1 km storm-relative helicity: 73 m²/s²
0-3 km storm-relative helicity: 176 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Dec 4, 3:36 PM EST, 31 minutes earlier.

Area forecast discussion, Dec 4, 3:36 PM EST, 31 minutes before

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Hazardous weather outlook, Dec 4, 3:28 AM EST, 12 hours 39 minutes before

Hazardous Weather Outlook
National Weather Service Burlington VT
328 AM EST Sat Dec 4 2021

NYZ026>031-034-035-087-VTZ001>012-016>019-050830-
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-Windsor-
Eastern Franklin-Eastern Chittenden-Eastern Addison-Eastern Rutland-
328 AM EST Sat Dec 4 2021

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

.DAY ONE...Today and tonight.

Hazardous weather is not expected at this time.

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

A strong low pressure system will develop over the Upper Midwest on
Sunday and track through Ontario and Quebec Monday and Tuesday. A
strong pressure gradient and low level jet will become establishes
across the North Country yielding gusty southwest winds in the 30 to
50 mph range on Monday and Monday night. These strong and gusty winds
could result in downed branches and isolated to scattered power
outages.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

In the hours before

Special weather statement, Dec 4, 2:56 PM EST, 1 hour 11 minutes before

Special Weather Statement
National Weather Service Burlington VT
256 PM EST Sat Dec 4 2021

NYZ026-027-029-030-087-042030-
Northern St. Lawrence-Northern Franklin-Southeastern St.
Lawrence-Southern Franklin-Southwestern St. Lawrence-
256 PM EST Sat Dec 4 2021

...AN AREA OF HEAVY SNOW WILL AFFECT CENTRAL FRANKLIN AND
SOUTHEASTERN ST. LAWRENCE COUNTIES...

At 256 PM EST...an area of heavy snow was along a line extending from
near Parishville to near Carry Falls Reservoir to near Oswegatchie...
and moving east at 35 mph.

Locations impacted include...
Potsdam, Oswegatchie, Moira, Bangor, Fowler, Parishville, Colton,
Bryants Mill, Degrasse, Burke, Carry Falls Reservoir, Cranberry Lake,
Brushton, Lawrenceville, Malone, Debar Mountain, Brasher Falls, Lake
Ozonia, Star Lake and Madawaska.

  * winds in excess of 25 mph are possible with this area of heavy
  snow.

  * visibilities will drop quickly to less than a half mile in this
  area of heavy snow.

Conditions can deteriorate rapidly in winter weather situations. Be
prepared for snow or ice covered roads. Slow down and allow extra
time when traveling.

LAT...LON 4451 7411 4428 7469 4407 7510 4426 7554
      4442 7501 4475 7497 4499 7417 4499 7412
TIME...MOT...LOC 1956Z 264DEG 28KT 4470 7476 4442 7479 4423 7515

Haynes

Special weather statement, Dec 4, 3:01 PM EST, 1 hour 6 minutes before

Special Weather Statement
National Weather Service Burlington VT
301 PM EST Sat Dec 4 2021

NYZ028-VTZ001>003-005>008-010-016-017-042045-
Eastern Clinton-Western Franklin-Caledonia-Grand Isle-Eastern
Chittenden-Western Chittenden-Washington-Eastern
Franklin-Orleans-Lamoille-Orange-
301 PM EST Sat Dec 4 2021

...AN AREA OF HEAVY SNOW WILL AFFECT EAST CENTRAL CLINTON...
LAMOILLE...SOUTHWESTERN CALEDONIA...NORTHERN ORANGE...SOUTHWESTERN
ORLEANS...CENTRAL GRAND ISLE...NORTHEASTERN CHITTENDEN...WASHINGTON
AND CENTRAL FRANKLIN COUNTIES...

At 300 PM EST...an area of heavy snow was along a line extending from
Milton to near Waterbury to near Braintree Hill...and moving east at
45 mph.

Locations impacted include...
Barre, Montpelier, Morrisville, Cambridge, Waterbury Village,
Montgomery Center, Websterville, Westford, Worcester, Middlesex,
Marshfield, Cabot Village, Georgia, Waterville, Washington,
Morrisville Village, Woodbury, Grand Isle, St. Albans Town and
Newbury.

This includes the following highways...
 Interstate 89 between mile markers 38 and 65, and between mile
markers 100 and 119.
 Interstate 91 between mile markers 104 and 121.

  * winds in excess of 25 mph are possible with this area of heavy
  snow.

  * visibilities will drop quickly to less than a half mile in this
  area of heavy snow.

Conditions can deteriorate rapidly in winter weather situations. Be
prepared for snow or ice covered roads. Slow down and allow extra
time when traveling.

LAT...LON 4491 7262 4455 7212 4430 7204 4429 7206
      4427 7207 4427 7206 4423 7205 4419 7207
      4413 7203 4411 7206 4410 7205 4410 7203
      4409 7205 4408 7203 4407 7206 4403 7270
      4433 7275 4484 7351
TIME...MOT...LOC 2000Z 252DEG 41KT 4465 7318 4439 7280 4401 7265

Haynes

Special weather statement, Dec 4, 3:15 PM EST, 52 minutes before

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Special weather statement, Dec 4, 3:32 PM EST, 35 minutes before

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Special weather statement, Dec 4, 4:04 PM EST, 3 minutes before

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Special weather statement, Dec 4, 4:07 PM EST, 0 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
Dec 4, 2:07 PM EST	Special Weather Statement	BTV	Chittenden	23 min
Dec 4, 2:25 PM EST	Special Weather Statement	BTV	Chittenden	50 min
Dec 4, 2:48 PM EST	Special Weather Statement	BTV	Addison	42 min
Dec 4, 3:01 PM EST	Special Weather Statement	BTV	Caledonia, Franklin, Grand Isle, Lamoille, Washington	44 min
Dec 4, 3:15 PM EST	Special Weather Statement	BTV	Chittenden	30 min
Dec 4, 3:23 PM EST	Wind Advisory	BTV	Addison, Caledonia, Chittenden, Essex, Franklin, Grand Isle and 5 more	59 hr
Dec 4, 3:32 PM EST	Special Weather Statement	BTV	Grand Isle	28 min
Dec 4, 4:04 PM EST	Special Weather Statement	BTV	Chittenden, Lamoille, Washington	41 min
Dec 4, 4:44 PM EST	Special Weather Statement	BTV	Franklin, Grand Isle, Lamoille	46 min
Dec 4, 2:21 PM EST	Special Weather Statement	BTV	St. Lawrence	39 min
Dec 4, 2:56 PM EST	Special Weather Statement	BTV	Franklin	34 min

Nearby

Special Weather Statements in Vermont, 2021 Special Weather Statements in New York, 2021 Every special weather statement in 2021

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.