Alert archive / New York / Special Weather Statements in 2021

Special Weather Statement, NWS Buffalo, NY

July 13, 2021Jefferson County, New York

NWS Buffalo, NY issued this special weather statement at Jul 13, 2021, 8:04 PM EDT for Jefferson County, New York. It was in force for 41 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 13, 2021, 8:04 PM EDT (00:04 UTC)
Expired: Jul 13, 2021, 8:45 PM EDT
In force: 41 min
Issued by: NWS Buffalo, NY

County Jefferson County, NY

The radar

The Ft Drum radar (KTYX), 55 km from the middle of the area, began a volume at 00:04 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.

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 00:00Z, 0.1 hours before the alert went out and 221 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.

285 
WWUS81 KBUF 140004
SPSBUF

Special Weather Statement
National Weather Service Buffalo NY
804 PM EDT Tue Jul 13 2021

NYZ006-007-140045-
Jefferson-Oswego-
804 PM EDT Tue Jul 13 2021

...A STRONG THUNDERSTORM WILL AFFECT SOUTHWESTERN JEFFERSON AND NORTH
CENTRAL OSWEGO COUNTIES...

At 804 PM EDT, a strong thunderstorm was located near Stony Point, or
17 miles northwest of Sandy Island Beach State Park, moving east at
30 mph.

Winds in excess of 40 mph and half inch hail are possible with this
storm.

Locations impacted include...
Stony Point, Adams, Dexter, Henderson Harbor, Southwick Beach State
Park, Adams Center, Sackets Harbor, Henderson, Smithville,
Brownville, Lorraine, Sandy Creek, Chaumont, Lacona, Mannsville,
Ellisburg, Three Mile Bay, Montario Point, Smartville and Belleville.

This includes Interstate 81 between exits 37 and 44.
 
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

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

LAT...LON 4417 7600 4362 7594 4365 7626 4378 7629
      4383 7636 4387 7635 4384 7644 4385 7648
      4387 7650 4391 7650 4396 7644 4396 7638
      4395 7634 4402 7636 4405 7641 4409 7642
TIME...MOT...LOC 0004Z 261DEG 28KT 4384 7639 
$$

JLA

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, 8:16 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 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

Special Weather Statements in New York, 2021 Every special weather statement 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.