Alert archive / New York / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 69, NWS Buffalo, NY

August 12, 2023Jefferson County, Lewis County, Oswego County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Aug 12, 2023, 6:57 PM EDT for Jefferson County, Lewis County, Oswego County, New York. It was in force for 63 min. 4 reports 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: Aug 12, 2023, 6:57 PM EDT (22:57 UTC)
Expired: Aug 12, 2023, 8:00 PM EDT
In force: 63 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 60.0 mph

Counties Jefferson County, NY, Lewis County, NY, Oswego County, NY

The radar

The Ft Drum radar (KTYX), 47 km from the middle of the area, began a volume at 23:00 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
Aug 12, 7:26 PM EDT	TSTM WND DMG	1 Ene Sackets Harbor, NY	Tree down on Military Rd.
Aug 12, 7:31 PM EDT	TSTM WND DMG	3 Nne Mannsville, NY	Trees snapped and uprooted. Delayed report.
Aug 12, 7:40 PM EDT	TSTM WND DMG	Lacona, NY	Multiple trees down between Rt15 and County Rt 22.
Aug 12, 7:50 PM EDT	TSTM WND DMG	1 Se Lacona, NY	Numerous trees down along County Route 22 near Lacona. Delayed report from Saturday evening.

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
Aug 12, 12:50 PM EDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 11.0 hours before the alert went out and 222 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: 270 J/kg
Mixed-layer CIN: -93 J/kg
Mixed-layer LCL: 757 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 76 m²/s²
0-3 km storm-relative helicity: 118 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted.

582 
WUUS51 KBUF 122257
SVRBUF
NYC045-049-075-130000-
/O.NEW.KBUF.SV.W.0069.230812T2257Z-230813T0000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
657 PM EDT Sat Aug 12 2023

The National Weather Service in Buffalo has issued a

* Severe Thunderstorm Warning for...
  Southern Jefferson County in central New York...
  Southwestern Lewis County in central New York...
  Northeastern Oswego County in central New York...

* Until 800 PM EDT.

* At 656 PM EDT, a severe thunderstorm was located 8 miles west of
  Stony Point, or 20 miles northwest of Sandy Island Beach State
  Park, moving east at 40 mph.

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

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Watertown, Sandy Island Beach State Park, Fort Drum, Stony Point,
  Carthage, Pulaski, West Carthage, Adams, Dexter, and Redfield.

This includes Interstate 81 between exits 37 and 48.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

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

A Tornado Watch remains in effect until 900 PM EDT for central New
York.

&&

LAT...LON 4347 7577 4361 7626 4369 7626 4378 7629
      4383 7636 4387 7635 4384 7645 4385 7648
      4387 7650 4391 7650 4396 7644 4396 7634
      4402 7636 4404 7639 4405 7629 4408 7558
TIME...MOT...LOC 2256Z 283DEG 34KT 4385 7646 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Apffel

3 follow-up statements

151 
WWUS51 KBUF 122325
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
725 PM EDT Sat Aug 12 2023

NYC045-049-075-130000-
/O.CON.KBUF.SV.W.0069.000000T0000Z-230813T0000Z/
Jefferson NY-Lewis NY-Oswego NY-
725 PM EDT Sat Aug 12 2023

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM EDT
FOR SOUTHERN JEFFERSON...SOUTHWESTERN LEWIS AND NORTHEASTERN OSWEGO
COUNTIES...

At 725 PM EDT, a severe thunderstorm was located near Adams, or 11
miles northeast of Sandy Island Beach State Park, moving east at 40
mph.

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

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Watertown, Sandy Island Beach State Park, Fort Drum, Stony Point,
Carthage, Pulaski, West Carthage, Adams, Dexter, and Redfield.

This includes Interstate 81 between exits 37 and 48.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 900 PM EDT for central New
York.

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

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

&&

LAT...LON 4347 7577 4361 7626 4369 7626 4379 7629
      4383 7636 4405 7634 4408 7558
TIME...MOT...LOC 2325Z 283DEG 34KT 4379 7609 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Apffel

151 
WWUS51 KBUF 122340
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
740 PM EDT Sat Aug 12 2023

NYC045-049-075-130000-
/O.CON.KBUF.SV.W.0069.000000T0000Z-230813T0000Z/
Jefferson NY-Lewis NY-Oswego NY-
740 PM EDT Sat Aug 12 2023

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM EDT
FOR SOUTHEASTERN JEFFERSON...SOUTHWESTERN LEWIS AND NORTHEASTERN
OSWEGO COUNTIES...

At 740 PM EDT, a severe thunderstorm was located near Barnes Corners,
or 14 miles south of Watertown, moving east at 40 mph.

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

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Watertown, Sandy Island Beach State Park, Fort Drum, Carthage,
Pulaski, West Carthage, Adams, Dexter, Redfield, and Glen Park.

This includes Interstate 81 between exits 37 and 48.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 900 PM EDT for central New
York.

A tornado watch remains in effect for the warned area. Tornadoes can
develop quickly from severe thunderstorms. Although a tornado is not
immediately likely, if one is spotted act quickly and move to a place
of safety inside a sturdy structure, such as a basement or small
interior room.

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

&&

LAT...LON 4347 7577 4361 7626 4373 7610 4383 7604
      4406 7608 4408 7558
TIME...MOT...LOC 2340Z 283DEG 34KT 4376 7589 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Apffel

916 
WWUS51 KBUF 122353
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
753 PM EDT Sat Aug 12 2023

NYC045-049-075-130002-
/O.EXP.KBUF.SV.W.0069.000000T0000Z-230813T0000Z/
Jefferson NY-Lewis NY-Oswego NY-
753 PM EDT Sat Aug 12 2023

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN JEFFERSON...
SOUTHWESTERN LEWIS AND NORTHEASTERN OSWEGO COUNTIES WILL EXPIRE AT
800 PM EDT...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire. Other warnings 
remain in effect for portions of these counties.

A Tornado Watch remains in effect until 900 PM EDT for central New
York.

LAT...LON 4347 7577 4361 7626 4373 7610 4383 7604
      4406 7608 4408 7558
TIME...MOT...LOC 2352Z 283DEG 34KT 4374 7576 

$$

Apffel

The office that day

Everything else NWS Buffalo, NY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 12, 4:20 AM EDT	Small Craft Advisory	BUF		18 hr
Aug 12, 4:31 AM EDT	Beach Hazards Statement	BUF	Erie	13 hr
Aug 12, 10:44 AM EDT	Special Marine Warning	BUF		61 min
Aug 12, 11:15 AM EDT	Special Weather Statement	BUF	Niagara, Orleans	60 min
Aug 12, 11:38 AM EDT	Special Marine Warning	BUF		52 min
Aug 12, 11:56 AM EDT	Special Marine Warning	BUF		64 min
Aug 12, 12:15 PM EDT	Special Weather Statement	BUF	Oswego	30 min
Aug 12, 12:30 PM EDT	Special Weather Statement	BUF	Wyoming	30 min
Aug 12, 12:36 PM EDT	Severe Thunderstorm Warning	BUF	Erie, Livingston, Wyoming	54 min
Aug 12, 1:19 PM EDT	Special Marine Warning	BUF		56 min
Aug 12, 1:33 PM EDT	Special Weather Statement	BUF	Lewis	57 min
Aug 12, 1:41 PM EDT	Severe Thunderstorm Warning	BUF	Lewis	46 min
Aug 12, 2:07 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis, Oswego	53 min
Aug 12, 3:43 PM EDT	Special Weather Statement	BUF	Jefferson	62 min
Aug 12, 5:17 PM EDT	Special Weather Statement	BUF	Lewis	43 min
Aug 12, 5:25 PM EDT	Severe Thunderstorm Warning	BUF	Lewis	35 min
Aug 12, 6:29 PM EDT	Special Marine Warning	BUF		61 min
Aug 12, 6:55 PM EDT	Special Weather Statement	BUF	Orleans	35 min
Aug 12, 6:58 PM EDT	Special Marine Warning	BUF		32 min
Aug 12, 7:01 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Oswego	44 min
Aug 12, 7:03 PM EDT	Special Marine Warning	BUF		42 min
Aug 12, 7:23 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis	67 min
Aug 12, 7:27 PM EDT	Special Marine Warning	BUF		33 min
Aug 12, 7:29 PM EDT	Tornado Warning	BUF	Oswego	35 min
Aug 12, 7:44 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis, Oswego	61 min

Nearby

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.