Alert archive / New York / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 65, NWS Buffalo, NY

July 13, 2021Lewis County, Oswego County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Jul 13, 2021, 5:41 PM EDT for Lewis County, Oswego County, New York. It was in force for 64 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, 5:41 PM EDT (21:41 UTC)
Expired: Jul 13, 2021, 6:45 PM EDT
In force: 64 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 70.0 mph

Counties Lewis County, NY, Oswego County, NY

The radar

The Ft Drum radar (KTYX), 26 km from the middle of the area, began a volume at 21:43 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, 5:51 PM EDT	TSTM WND DMG	Osceola, NY	TREE ON A POWERLINE IN OSCEOLA. TIME ESTIMATED BASED ON RADAR.

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
Jul 13, 1:37 PM EDT	Severe Thunderstorm Watch	SPC	10 hr

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 9.7 hours before the alert went out and 178 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: 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

Open this sounding in Storm Lab

The text

As transmitted.

673 
WUUS51 KBUF 132141
SVRBUF
NYC049-075-132245-
/O.NEW.KBUF.SV.W.0065.210713T2141Z-210713T2245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
541 PM EDT Tue Jul 13 2021

The National Weather Service in Buffalo has issued a

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

* Until 645 PM EDT..

* At 541 PM EDT, a severe thunderstorm was located 7 miles north of
  Camden, moving north at 25 mph.

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

  SOURCE...Radar indicated.

  IMPACT...Expect considerable tree damage. Damage is likely to 
           mobile homes, roofs, and outbuildings.

* Locations impacted include...
  Redfield, Highmarket, Williamstown, Lyons Falls, Constableville,
  Turin, Osceola, Amboy Center, Salmon River Reservoir and Kasoag.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

&&

LAT...LON 4345 7548 4342 7553 4348 7581 4334 7588
      4336 7604 4370 7585 4369 7578 4371 7577
      4364 7535
TIME...MOT...LOC 2141Z 197DEG 21KT 4344 7570 

TORNADO...POSSIBLE
HAIL...0.75IN
WIND...70MPH
 
$$

JLA

2 follow-up statements

930 
WWUS51 KBUF 132219
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
619 PM EDT Tue Jul 13 2021

NYC049-075-132245-
/O.CON.KBUF.SV.W.0065.000000T0000Z-210713T2245Z/
Lewis NY-Oswego NY-
619 PM EDT Tue Jul 13 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM EDT
FOR SOUTHWESTERN LEWIS AND NORTHEASTERN OSWEGO COUNTIES...

At 619 PM EDT, a severe thunderstorm was located near Highmarket, or
18 miles northwest of Boonville, moving north at 25 mph.

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

SOURCE...Radar indicated.

IMPACT...Expect considerable tree damage. Damage is likely to mobile 
         homes, roofs, and outbuildings.

Locations impacted include...
Highmarket, Lyons Falls, Constableville, Turin, Mohawk Hill and North
Osceola.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4352 7543 4351 7554 4353 7569 4358 7588
      4370 7585 4369 7578 4371 7577 4364 7535
TIME...MOT...LOC 2219Z 197DEG 21KT 4365 7561 

TORNADO...POSSIBLE
HAIL...0.75IN
WIND...70MPH
 
$$

JLA

820 
WWUS51 KBUF 132241
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
641 PM EDT Tue Jul 13 2021

NYC049-075-132248-
/O.EXP.KBUF.SV.W.0065.000000T0000Z-210713T2245Z/
Lewis NY-Oswego NY-
641 PM EDT Tue Jul 13 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN LEWIS AND
NORTHEASTERN OSWEGO COUNTIES WILL EXPIRE AT 645 PM EDT...
        
The storm which prompted the warning has moved north out of the area.
Therefore, the warning will be allowed to expire. However, another 
Severe Thunderstorm Warning still remains in effect for portions of 
central Lewis county and southeastern Jefferson county through 715 
PM EDT.  

A Severe Thunderstorm Watch remains in effect until 1100 PM EDT for
central New York.

LAT...LON 4352 7543 4351 7554 4353 7569 4358 7588
      4370 7585 4369 7578 4371 7577 4364 7535
TIME...MOT...LOC 2238Z 197DEG 14KT 4371 7558 

$$

JLA

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 13, 3:40 AM EDT	Special Weather Statement	BUF	Lewis	50 min
Jul 13, 1:29 PM EDT	Special Weather Statement	BUF	Erie	46 min
Jul 13, 1:56 PM EDT	Special Marine Warning	BUF		64 min
Jul 13, 2:45 PM EDT	Special Weather Statement	BUF	Monroe	30 min
Jul 13, 3:40 PM EDT	Special Marine Warning	BUF		50 min
Jul 13, 4:34 PM EDT	Special Marine Warning	BUF		56 min
Jul 13, 4:41 PM EDT	Severe Thunderstorm Warning	BUF	Chautauqua	64 min
Jul 13, 4:46 PM EDT	Special Weather Statement	BUF	Wayne	44 min
Jul 13, 4:50 PM EDT	Severe Thunderstorm Warning	BUF	Oswego	55 min
Jul 13, 4:59 PM EDT	Special Marine Warning	BUF		46 min
Jul 13, 5:23 PM EDT	Severe Thunderstorm Warning	BUF	Oswego	45 min
Jul 13, 5:26 PM EDT	Special Marine Warning	BUF		64 min
Jul 13, 5:33 PM EDT	Special Marine Warning	BUF		42 min
Jul 13, 5:38 PM EDT	Severe Thunderstorm Warning	BUF	Cattaraugus, Chautauqua, Erie	52 min
Jul 13, 5:43 PM EDT	Special Weather Statement	BUF	Monroe	32 min
Jul 13, 5:57 PM EDT	Severe Thunderstorm Warning	BUF	Allegany, Cattaraugus, Chautauqua, Erie, Wyoming	63 min
Jul 13, 6:05 PM EDT	Special Marine Warning	BUF		55 min
Jul 13, 6:07 PM EDT	Special Marine Warning	BUF		38 min
Jul 13, 6:08 PM EDT	Special Marine Warning	BUF		52 min
Jul 13, 6:09 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis	53 min
Jul 13, 6:19 PM EDT	Severe Thunderstorm Warning	BUF	Erie, Genesee, Niagara, Orleans	41 min
Jul 13, 6:46 PM EDT	Special Marine Warning	BUF		89 min
Jul 13, 6:55 PM EDT	Severe Thunderstorm Warning	BUF	Niagara, Orleans	50 min
Jul 13, 7:02 PM EDT	Special Marine Warning	BUF		58 min
Jul 13, 7:05 PM EDT	Special Weather Statement	BUF	Jefferson	25 min
Jul 13, 7:07 PM EDT	Special Marine Warning	BUF		53 min
Jul 13, 7:15 PM EDT	Severe Thunderstorm Warning	BUF	Genesee, Livingston, Monroe, Orleans, Wayne	60 min
Jul 13, 7:27 PM EDT	Special Marine Warning	BUF		93 min
Jul 13, 7:41 PM EDT	Special Marine Warning	BUF		94 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.