Alert archive / New York / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 74, NWS Buffalo, NY

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

NWS Buffalo, NY issued this severe thunderstorm warning at Jul 13, 2021, 10:17 PM EDT for Jefferson County, Lewis County, Oswego County, New York. It was in force for 73 min. 2 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: Jul 13, 2021, 10:17 PM EDT (02:17 UTC)
Expired: Jul 13, 2021, 11:30 PM EDT
In force: 73 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

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

The radar

The Ft Drum radar (KTYX), 4 km from the middle of the area, began a volume at 02:20 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, 10:30 PM EDT	TSTM WND DMG	1 Ene Osceola, NY	TREES AND WIRES DOWN ON OSCEOLA RD.
Jul 13, 11:04 PM EDT	TSTM WND DMG	7 Ne Croghan, NY	TREES AND WIRES DOWN ON LONG POND RD.

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 00:00Z, 2.3 hours before the alert went out and 190 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: 4 J/kg
Mixed-layer CIN: -268 J/kg
Mixed-layer LCL: 571 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 133 m²/s²
0-3 km storm-relative helicity: 159 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted.

882 
WUUS51 KBUF 140217
SVRBUF
NYC045-049-075-140330-
/O.NEW.KBUF.SV.W.0074.210714T0217Z-210714T0330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
1017 PM EDT Tue Jul 13 2021

The National Weather Service in Buffalo has issued a

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

* Until 1130 PM EDT..

* At 1016 PM EDT, severe thunderstorms were located along a line
  extending from near Kring Point State Park to near Fort Drum to
  near Redfield to 7 miles southwest of Camden, moving northeast at
  40 mph.

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

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Fort Drum, Carthage, Lowville, West Carthage, Redfield, Herrings,
  Kring Point State Park, Highmarket, Redwood and Barnes Corners.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 4342 7553 4348 7581 4347 7582 4348 7587
      4403 7579 4437 7592 4440 7586 4410 7517
      4361 7511
TIME...MOT...LOC 0216Z 239DEG 35KT 4445 7586 4408 7571 4358 7577 4329
7589

HAIL...0.75IN
WIND...60MPH
 
$$

Mitchell

1 follow-up statement

889 
WWUS51 KBUF 140323
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
1123 PM EDT Tue Jul 13 2021

NYC045-049-075-140333-
/O.EXP.KBUF.SV.W.0074.000000T0000Z-210714T0330Z/
Jefferson NY-Lewis NY-Oswego NY-
1123 PM EDT Tue Jul 13 2021

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN JEFFERSON...LEWIS AND
NORTHEASTERN OSWEGO COUNTIES WILL EXPIRE AT 1130 PM EDT...
    
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire.

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

LAT...LON 4342 7553 4348 7581 4347 7582 4348 7587
      4403 7579 4437 7592 4440 7586 4410 7517
      4361 7511
TIME...MOT...LOC 0323Z 239DEG 35KT 4477 7511 4440 7496 4390 7502 4361
7515

$$

Mitchell

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 13, 8:00 PM EDT	Special Marine Warning	BUF		45 min
Jul 13, 8:04 PM EDT	Areal Flood Warning	BUF	Monroe	3 hr
Jul 13, 8:04 PM EDT	Special Weather Statement	BUF	Jefferson	41 min
Jul 13, 8:16 PM EDT	Special Weather Statement	BUF	Ontario, Wayne	44 min
Jul 13, 8:28 PM EDT	Special Marine Warning	BUF		2 hr
Jul 13, 8:35 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Oswego, Wayne	55 min
Jul 13, 9:03 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Wayne	27 min
Jul 13, 9:25 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Jefferson, Lewis, Oswego	65 min
Jul 13, 9:38 PM EDT	Special Marine Warning	BUF		82 min
Jul 14, 4:07 AM EDT	Flash Flood Warning	BUF	Cattaraugus, Chautauqua, Erie	3 hr
Jul 14, 5:45 AM EDT	Special Weather Statement	BUF	Wyoming	60 min
Jul 14, 7:15 AM EDT	Areal Flood Warning	BUF	Allegany, Cattaraugus, Chautauqua, Erie, Wyoming	3 hr
Jul 14, 2:16 PM EDT	Special Weather Statement	BUF	Niagara	59 min
Jul 14, 3:26 PM EDT	Special Weather Statement	BUF	Genesee	49 min
Jul 14, 5:03 PM EDT	Special Weather Statement	BUF	Ontario	57 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.