Alert archive / New York / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 63, NWS Buffalo, NY

July 13, 2021Oswego County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Jul 13, 2021, 5:23 PM EDT for Oswego County, New York. It was in force for 45 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, 5:23 PM EDT (21:23 UTC)
Expired
Jul 13, 2021, 6:08 PM EDT
In force
45 min
Issued by
NWS Buffalo, NY
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

County Oswego County, NY

The radar

The Ft Drum radar (KTYX), 54 km from the middle of the area, began a volume at 21:27 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

TimeReportWhereRemark
Jul 13, 5:33 PM EDTTSTM WND DMGScriba, NYTREES AND POWERLINES DOWN IN SCRIBA. TIME ESTIMATED BASED UPON 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.

IssuedProductOfficeLasted
Jul 13, 1:37 PM EDTSevere Thunderstorm WatchSPC10 hr

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 9.4 hours before the alert went out and 207 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-pSkew-T log-p diagram, Buffalo Intl Airport, NY at 12:00Z on 2021-07-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 610 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Buffalo Intl Airport, NY at 12:00Z on 2021-07-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 56 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
610 J/kg
Mixed-layer CIN
-36 J/kg
Mixed-layer LCL
907 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
56 m²/s²
0-3 km storm-relative helicity
90 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.9

Open this sounding in Storm Lab

The text

As transmitted.

640 
WUUS51 KBUF 132123
SVRBUF
NYC075-132230-
/O.NEW.KBUF.SV.W.0063.210713T2123Z-210713T2230Z/

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

The National Weather Service in Buffalo has issued a

* Severe Thunderstorm Warning for...
  Northwestern Oswego County in central New York...

* Until 630 PM EDT..

* At 523 PM EDT, a severe thunderstorm was located near Battle Island
  State Park, or near Oswego, moving north at 30 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, Nine Mile Point, Mexico Point State Park, Battle
  Island State Park, Scriba, Volney, Palermo, New Haven and Minetto.

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 4375 7621 4368 7620 4368 7619 4329 7628
      4332 7654 4351 7652 4356 7645 4357 7636
      4356 7631 4357 7628 4358 7626 4369 7626
      4376 7628
TIME...MOT...LOC 2123Z 189DEG 26KT 4341 7641 

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

JLA
1 follow-up statement
206 
WWUS51 KBUF 132208
SVSBUF

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

NYC075-132218-
/O.CAN.KBUF.SV.W.0063.000000T0000Z-210713T2230Z/
Oswego NY-
608 PM EDT Tue Jul 13 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN OSWEGO COUNTY IS
CANCELLED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.

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

LAT...LON 4375 7621 4368 7620 4368 7619 4329 7628
      4332 7654 4351 7652 4356 7645 4357 7636
      4356 7631 4357 7628 4358 7626 4369 7626
      4376 7628
TIME...MOT...LOC 2205Z 189DEG 26KT 4381 7636 

$$

Mitchell

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 13, 3:40 AM EDTSpecial Weather StatementBUFLewis50 min
Jul 13, 1:29 PM EDTSpecial Weather StatementBUFErie46 min
Jul 13, 1:56 PM EDTSpecial Marine WarningBUF64 min
Jul 13, 2:45 PM EDTSpecial Weather StatementBUFMonroe30 min
Jul 13, 3:40 PM EDTSpecial Marine WarningBUF50 min
Jul 13, 4:34 PM EDTSpecial Marine WarningBUF56 min
Jul 13, 4:41 PM EDTSevere Thunderstorm WarningBUFChautauqua64 min
Jul 13, 4:46 PM EDTSpecial Weather StatementBUFWayne44 min
Jul 13, 4:50 PM EDTSevere Thunderstorm WarningBUFOswego55 min
Jul 13, 4:59 PM EDTSpecial Marine WarningBUF46 min
Jul 13, 5:26 PM EDTSpecial Marine WarningBUF64 min
Jul 13, 5:33 PM EDTSpecial Marine WarningBUF42 min
Jul 13, 5:38 PM EDTSevere Thunderstorm WarningBUFCattaraugus, Chautauqua, Erie52 min
Jul 13, 5:41 PM EDTSevere Thunderstorm WarningBUFLewis, Oswego64 min
Jul 13, 5:43 PM EDTSpecial Weather StatementBUFMonroe32 min
Jul 13, 5:57 PM EDTSevere Thunderstorm WarningBUFAllegany, Cattaraugus, Chautauqua, Erie, Wyoming63 min
Jul 13, 6:05 PM EDTSpecial Marine WarningBUF55 min
Jul 13, 6:07 PM EDTSpecial Marine WarningBUF38 min
Jul 13, 6:08 PM EDTSpecial Marine WarningBUF52 min
Jul 13, 6:09 PM EDTSevere Thunderstorm WarningBUFJefferson, Lewis53 min
Jul 13, 6:19 PM EDTSevere Thunderstorm WarningBUFErie, Genesee, Niagara, Orleans41 min
Jul 13, 6:46 PM EDTSpecial Marine WarningBUF89 min
Jul 13, 6:55 PM EDTSevere Thunderstorm WarningBUFNiagara, Orleans50 min
Jul 13, 7:02 PM EDTSpecial Marine WarningBUF58 min
Jul 13, 7:05 PM EDTSpecial Weather StatementBUFJefferson25 min
Jul 13, 7:07 PM EDTSpecial Marine WarningBUF53 min
Jul 13, 7:15 PM EDTSevere Thunderstorm WarningBUFGenesee, Livingston, Monroe, Orleans, Wayne60 min
Jul 13, 7:27 PM EDTSpecial Marine WarningBUF93 min
Jul 13, 7:41 PM EDTSpecial Marine WarningBUF94 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.