Alert archive / New York / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 9, NWS Burlington, VT

June 21, 2021Franklin County, St. Lawrence County, New York

NWS Burlington, VT issued this severe thunderstorm warning at Jun 21, 2021, 2:35 PM EDT for Franklin County, St. Lawrence County, New York. It was in force for 55 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jun 21, 2021, 2:35 PM EDT (18:35 UTC)
Expired: Jun 21, 2021, 3:30 PM EDT
In force: 55 min
Issued by: NWS Burlington, VT
Area: Storm-based polygon
Hail: 1.0 in
Wind: 70.0 mph

Counties Franklin County, NY, St. Lawrence County, NY

The radar

The Ft Drum radar (KTYX), 106 km from the middle of the area, began a volume at 18:39 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.

What was reported inside it

Time	Report	Where	Remark
Jun 21, 2:44 PM EDT	TSTM WND DMG	South Edwards, NY	TREES REPORTED DOWN IN SOUTH EDWARDS AND FINE. POWER OUTAGES ALSO REPORTED IN THESE LOCATIONS.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 21, 1:11 PM EDT	Severe Thunderstorm Watch	SPC	10 hr

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 6.6 hours before the alert went out and 200 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: 524 J/kg
Mixed-layer CIN: -118 J/kg
Mixed-layer LCL: 990 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 162 m²/s²
0-3 km storm-relative helicity: 192 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 2.4

Open this sounding in Storm Lab

The text

As transmitted.

877 
WUUS51 KBTV 211835
SVRBTV
NYC033-089-211930-
/O.NEW.KBTV.SV.W.0009.210621T1835Z-210621T1930Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Burlington VT
235 PM EDT Mon Jun 21 2021

The National Weather Service in Burlington has issued a

* Severe Thunderstorm Warning for...
  Southwestern Franklin County in northern New York...
  Southeastern St. Lawrence County in northern New York...

* Until 330 PM EDT.

* At 235 PM EDT, a severe thunderstorm was located near Pitcairn,
  moving northeast at 50 mph.

  HAZARD...70 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Minor hail damage to vehicles is possible. Expect 
           considerable tree damage. Wind damage is also likely to 
           mobile homes, roofs, and outbuildings.

* Locations impacted include...
  Oswegatchie, Parishville, Degrasse, Carry Falls Reservoir,
  Cranberry Lake, Lake Ozonia, Star Lake, Madawaska, Lawrenceville,
  Dickinson, Fine, Hopkinton, Pitcairn, Stark, Santa Clara, Paul
  Smiths, Dickinson Center, South Edwards, Gabriels and Upper Saint
  Regis.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4441 7414 4408 7513 4419 7538 4480 7462
TIME...MOT...LOC 1835Z 232DEG 45KT 4415 7523 

HAIL...1.00IN
WIND...70MPH
 
$$

Neiles

3 follow-up statements

902 
WWUS51 KBTV 211855
SVSBTV

Severe Weather Statement
National Weather Service Burlington VT
255 PM EDT Mon Jun 21 2021

NYC033-089-211930-
/O.CON.KBTV.SV.W.0009.000000T0000Z-210621T1930Z/
Franklin NY-St. Lawrence NY-
255 PM EDT Mon Jun 21 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM EDT
FOR SOUTHWESTERN FRANKLIN AND SOUTHEASTERN ST. LAWRENCE COUNTIES...

At 254 PM EDT, a severe thunderstorm was located near Newton Falls,
moving northeast at 50 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Minor hail damage to vehicles is possible. Expect wind 
         damage to trees and powerlines.

Locations impacted include...
Parishville, Degrasse, Carry Falls Reservoir, Cranberry Lake, Lake
Ozonia, Madawaska, Lawrenceville, Dickinson, Hopkinton, Stark, Santa
Clara, Paul Smiths, Dickinson Center, Gabriels, Upper Saint Regis,
St. Regis Mountain, Gale, Newton Falls, Childwold and Shurtleff.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4414 7495 4433 7520 4480 7462 4441 7414
TIME...MOT...LOC 1854Z 232DEG 45KT 4430 7496 

HAIL...1.00IN
WIND...60MPH
 
$$

Neiles

381 
WWUS51 KBTV 211915
SVSBTV

Severe Weather Statement
National Weather Service Burlington VT
315 PM EDT Mon Jun 21 2021

NYC033-089-211930-
/O.CON.KBTV.SV.W.0009.000000T0000Z-210621T1930Z/
Franklin NY-St. Lawrence NY-
315 PM EDT Mon Jun 21 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM EDT
FOR SOUTHWESTERN FRANKLIN AND EAST CENTRAL ST. LAWRENCE COUNTIES...

At 315 PM EDT, a severe thunderstorm was located near Carry Falls
Reservoir, moving northeast at 50 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Minor hail damage to vehicles is possible. Expect wind 
         damage to trees and powerlines.

Locations impacted include...
Parishville, Carry Falls Reservoir, Lake Ozonia, Madawaska,
Lawrenceville, Dickinson, Hopkinton, Stark, Santa Clara, Paul Smiths,
Dickinson Center, Gabriels, Upper Saint Regis, St. Regis Falls, St.
Regis Mountain, Azure Mountain, Nicholville, Upper St. Regis and
South Colton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4426 7460 4454 7494 4480 7462 4441 7414
TIME...MOT...LOC 1915Z 232DEG 45KT 4446 7467 

HAIL...1.00IN
WIND...60MPH
 
$$

Neiles

412 
WWUS51 KBTV 211931
SVSBTV

Severe Weather Statement
National Weather Service Burlington VT
331 PM EDT Mon Jun 21 2021

NYC033-089-211940-
/O.EXP.KBTV.SV.W.0009.000000T0000Z-210621T1930Z/
Franklin NY-St. Lawrence NY-
331 PM EDT Mon Jun 21 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN FRANKLIN AND EAST
CENTRAL ST. LAWRENCE COUNTIES HAS EXPIRED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been allowed to expire.

A Severe Thunderstorm Watch remains in effect until 900 PM EDT for
northern New York.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Burlington.

Remember, a Severe Thunderstorm Warning still remains in effect for
parts of Franklin and Clinton Counties. 

LAT...LON 4426 7460 4454 7494 4480 7462 4441 7414
TIME...MOT...LOC 1930Z 232DEG 45KT 4457 7448 

$$

Neiles

The office that day

Everything else NWS Burlington, VT issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 21, 7:59 AM EDT	Special Weather Statement	BTV	St. Lawrence	61 min
Jun 21, 9:12 AM EDT	Special Weather Statement	BTV	Clinton, Franklin	48 min
Jun 21, 10:08 AM EDT	Special Weather Statement	BTV	Clinton	37 min
Jun 21, 1:06 PM EDT	Special Weather Statement	BTV	St. Lawrence	39 min
Jun 21, 1:28 PM EDT	Special Weather Statement	BTV	St. Lawrence	62 min
Jun 21, 1:41 PM EDT	Severe Thunderstorm Warning	BTV	Franklin, St. Lawrence	49 min
Jun 21, 2:08 PM EDT	Special Weather Statement	BTV	St. Lawrence	67 min
Jun 21, 3:13 PM EDT	Severe Thunderstorm Warning	BTV	Essex	62 min
Jun 21, 3:25 PM EDT	Severe Thunderstorm Warning	BTV	Clinton, Essex, Franklin, St. Lawrence	54 min
Jun 21, 4:40 PM EDT	Severe Thunderstorm Warning	BTV	Essex	65 min
Jun 21, 4:57 PM EDT	Special Weather Statement	BTV	Essex	48 min
Jun 21, 5:12 PM EDT	Severe Thunderstorm Warning	BTV	Essex	63 min
Jun 21, 7:50 PM EDT	Special Weather Statement	BTV	Essex	25 min

Nearby

Severe Thunderstorm Warnings in New York, 2021 Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.