Alert archive / New York / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 26, NWS Burlington, VT
NWS Burlington, VT issued this severe thunderstorm warning at Jul 13, 2021, 7:10 PM EDT for St. Lawrence County, New York. It was in force for 65 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
- Jul 13, 2021, 7:10 PM EDT (23:10 UTC)
- Expired
- Jul 13, 2021, 8:15 PM EDT
- In force
- 65 min
- Issued by
- NWS Burlington, VT
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County St. Lawrence County, NY
The radar
The Ft Drum radar (KTYX), 128 km from the middle of the area, began a volume at 23:12 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 |
|---|---|---|---|
| Jul 13, 7:40 PM EDT | TSTM WND DMG | Potsdam, NY | BRANCHES/TREE DOWN ON UTILITY LINE. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Albany, NY (KALY), launched 12:00Z, 11.2 hours before the alert went out and 259 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 614 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 154 m²/s²
- 0-3 km storm-relative helicity
- 172 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
878
WUUS51 KBTV 132310
SVRBTV
NYC089-140015-
/O.NEW.KBTV.SV.W.0026.210713T2310Z-210714T0015Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Burlington VT
710 PM EDT Tue Jul 13 2021
The National Weather Service in Burlington has issued a
* Severe Thunderstorm Warning for...
Northeastern St. Lawrence County in northern New York...
* Until 815 PM EDT.
* At 710 PM EDT, a severe thunderstorm was located over East De Kalb,
moving northeast at 30 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and powerlines.
* Locations impacted include...
Potsdam, Canton, Norfolk, Louisville, De Kalb, Rensselaer Falls,
Morley, Norwood, Hermon, Chipman, Brasher Falls, Waddington,
Madrid, North Stockholm, West Stockholm, West Potsdam, Coles Creek
State Park, Winthrop, East De Kalb and Pyrites.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4480 7471 4438 7527 4449 7547 4487 7521
4488 7520 4487 7519 4488 7517 4489 7517
4487 7516 4489 7515 4490 7512 4489 7512
4493 7508 4492 7506 4493 7505 4494 7502
TIME...MOT...LOC 2310Z 219DEG 24KT 4450 7531
HAIL...<.75IN
WIND...60MPH
$$
SLW1 follow-up statement
499
WWUS51 KBTV 132333
SVSBTV
Severe Weather Statement
National Weather Service Burlington VT
733 PM EDT Tue Jul 13 2021
NYC089-140015-
/O.CON.KBTV.SV.W.0026.000000T0000Z-210714T0015Z/
St. Lawrence NY-
733 PM EDT Tue Jul 13 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM EDT
FOR NORTHEASTERN ST. LAWRENCE COUNTY...
At 733 PM EDT, a severe thunderstorm was located over Canton, moving
northeast at 30 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and powerlines.
Locations impacted include...
Potsdam, Canton, Norfolk, Louisville, Morley, Waddington, Norwood,
Madrid, Chipman, Brasher Falls, North Stockholm, Pyrites, West
Stockholm, West Potsdam, Coles Creek State Park, Stockholm Center,
Raymondville, Winthrop, North Russell and Hannawa Falls.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4480 7471 4449 7514 4457 7529 4487 7521
4488 7520 4487 7519 4488 7517 4489 7517
4487 7516 4489 7515 4490 7512 4489 7512
4493 7508 4492 7506 4493 7505 4494 7502
TIME...MOT...LOC 2333Z 219DEG 24KT 4462 7517
HAIL...<.75IN
WIND...60MPH
$$
SLWThe office that day
Everything else NWS Burlington, VT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 13, 5:06 PM EDT | Special Weather Statement | BTV | St. Lawrence | 54 min |
| Jul 13, 6:03 PM EDT | Special Weather Statement | BTV | St. Lawrence | 87 min |
| Jul 13, 6:22 PM EDT | Special Weather Statement | BTV | Franklin | 53 min |
| Jul 13, 6:49 PM EDT | Special Weather Statement | BTV | St. Lawrence | 56 min |
| Jul 13, 7:27 PM EDT | Severe Thunderstorm Warning | BTV | St. Lawrence | 48 min |
Nearby
Severe Thunderstorm Warnings in New York, 2021Every 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.