Alert archive / New York / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 71, NWS Buffalo, NY

July 13, 2021Cayuga County, Oswego County, Wayne County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Jul 13, 2021, 8:35 PM EDT for Cayuga County, Oswego County, Wayne County, New York. It was in force for 55 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, 8:35 PM EDT (00:35 UTC)
Expired: Jul 13, 2021, 9:30 PM EDT
In force: 55 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Cayuga County, NY, Oswego County, NY, Wayne County, NY

The radar

The Ft Drum radar (KTYX), 94 km from the middle of the area, began a volume at 00:35 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, 9:15 PM EDT	TSTM WND DMG	Hannibal, NY	TREES DOWN IN THE TOWN OF HANNIBAL. TIME ESTIMATED BY RADAR.
Jul 13, 9:20 PM EDT	TSTM WND DMG	Oswego, NY	TREES DOWN IN OSWEGO. TIME ESTIMATED BY 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

Buffalo Intl Airport, NY (KBUF), launched 00:00Z, 0.6 hours before the alert went out and 172 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: 883 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: -60 m²/s²
0-3 km storm-relative helicity: -49 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

681 
WUUS51 KBUF 140035
SVRBUF
NYC011-075-117-140130-
/O.NEW.KBUF.SV.W.0071.210714T0035Z-210714T0130Z/

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

The National Weather Service in Buffalo has issued a

* Severe Thunderstorm Warning for...
  Northeastern Wayne County in western New York...
  Cayuga County in central New York...
  Southwestern Oswego County in central New York...

* Until 930 PM EDT..

* At 834 PM EDT, a severe thunderstorm was located near Chimney
  Bluffs State Park, or 16 miles southwest of Fair Haven Beach State
  Park, moving east at 35 mph.

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

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Oswego, Fulton, Fair Haven Beach State Park, Sodus, Cato, Chimney
  Bluffs State Park, Battle Island State Park, Scriba, Volney and
  Sterling.

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.

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

&&

LAT...LON 4323 7631 4323 7648 4315 7647 4314 7649
      4312 7648 4309 7705 4325 7710 4334 7689
      4335 7681 4339 7673 4344 7667 4355 7642
TIME...MOT...LOC 0034Z 257DEG 32KT 4318 7694 

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

JLA

1 follow-up statement

242 
WWUS51 KBUF 140110
SVSBUF

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

NYC011-075-117-140130-
/O.CON.KBUF.SV.W.0071.000000T0000Z-210714T0130Z/
Wayne NY-Cayuga NY-Oswego NY-
910 PM EDT Tue Jul 13 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 PM EDT
FOR NORTHEASTERN WAYNE...CAYUGA AND SOUTHWESTERN OSWEGO COUNTIES...

At 909 PM EDT, a severe thunderstorm was located near Fair Haven
Beach State Park, moving east at 25 mph.

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

SOURCE...Radar indicated.

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

Locations impacted include...
Oswego, Fulton, Fair Haven Beach State Park, Cato, Battle Island
State Park, Scriba, Volney, Sterling, Ira and Conquest.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Frequent 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 4323 7631 4323 7648 4315 7647 4314 7649
      4312 7648 4311 7677 4335 7684 4335 7681
      4339 7673 4344 7667 4355 7642
TIME...MOT...LOC 0109Z 252DEG 23KT 4324 7671 

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

Welch

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, 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 13, 10:17 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis, Oswego	73 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.