Alert archive / New York / Special Weather Statements in 2021

Special Weather Statement, NWS Buffalo, NY

July 7, 2021Chautauqua County, New York

NWS Buffalo, NY issued this special weather statement at Jul 7, 2021, 3:34 AM EDT for Chautauqua County, New York. It was in force for 26 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 7, 2021, 3:34 AM EDT (07:34 UTC)
Expired: Jul 7, 2021, 4:00 AM EDT
In force: 26 min
Issued by: NWS Buffalo, NY

County Chautauqua County, NY

The radar

The Buffalo radar (KBUF), 103 km from the middle of the area, began a volume at 07:35 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.

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 00:00Z, 7.6 hours before the alert went out and 104 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: 873 J/kg
Mixed-layer CIN: -45 J/kg
Mixed-layer LCL: 1076 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 115 m²/s²
0-3 km storm-relative helicity: 115 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.2

Open this sounding in Storm Lab

The text

As transmitted.

538 
WWUS81 KBUF 070734
SPSBUF

Special Weather Statement
National Weather Service Buffalo NY
334 AM EDT Wed Jul 7 2021

NYZ019-070800-
Chautauqua-
334 AM EDT Wed Jul 7 2021

...A STRONG THUNDERSTORM WILL AFFECT CENTRAL CHAUTAUQUA COUNTY...

At 333 AM EDT, a strong thunderstorm was located over Westfield, or
13 miles southwest of Fredonia, moving east at 40 mph.

Winds in excess of 30 mph are possible with this storm.

Locations impacted include...
Westfield, Lakewood, Mayville, Long Point State Park, Chautauqua
Institution, Chautauqua, Portland, Ripley, Stockton, Brocton,
Cassadaga, Sinclairville, Bemus Point, Ripley Beach, Barcelona,
Dewittville, Stedman Corners, Stow and Ellery Center.

This includes the following highways...
 Interstate 90 between exits 61 and 60.
 Interstate 86 between exits 7 and 10.

Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

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.

Persons in campgrounds should consider seeking sturdy shelter until
this storm passes.

LAT...LON 4227 7976 4228 7973 4229 7975 4234 7972
      4242 7954 4238 7921 4209 7930 4223 7976
TIME...MOT...LOC 0733Z 283DEG 36KT 4234 7955 
$$

JLA

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 6, 8:26 PM EDT	Special Weather Statement	BUF	Allegany	64 min
Jul 6, 9:30 PM EDT	Special Weather Statement	BUF	Cayuga	30 min
Jul 7, 12:51 AM EDT	Special Weather Statement	BUF	Chautauqua	39 min
Jul 7, 4:00 AM EDT	Special Weather Statement	BUF	Cattaraugus	90 min
Jul 7, 4:17 AM EDT	Special Weather Statement	BUF	Allegany	43 min
Jul 7, 4:38 AM EDT	Beach Hazards Statement	BUF	Monroe, Niagara, Orleans, Wayne	17 hr
Jul 7, 4:39 AM EDT	Small Craft Advisory	BUF		17 hr
Jul 7, 4:48 AM EDT	Special Marine Warning	BUF		42 min
Jul 7, 4:52 AM EDT	Special Weather Statement	BUF	Niagara	38 min
Jul 7, 5:27 AM EDT	Special Weather Statement	BUF	Orleans	48 min
Jul 7, 6:04 AM EDT	Special Weather Statement	BUF	Monroe	41 min
Jul 7, 6:49 AM EDT	Special Weather Statement	BUF	Ontario	41 min
Jul 7, 4:33 PM EDT	Special Weather Statement	BUF	Allegany	42 min
Jul 7, 5:15 PM EDT	Special Weather Statement	BUF	Livingston	30 min
Jul 7, 6:10 PM EDT	Special Weather Statement	BUF	Chautauqua	35 min
Jul 7, 6:47 PM EDT	Severe Thunderstorm Warning	BUF	Cattaraugus, Chautauqua	58 min
Jul 7, 6:49 PM EDT	Special Marine Warning	BUF		86 min
Jul 7, 6:52 PM EDT	Special Weather Statement	BUF	Allegany	38 min
Jul 7, 6:53 PM EDT	Special Weather Statement	BUF	Allegany	37 min
Jul 7, 7:03 PM EDT	Severe Thunderstorm Warning	BUF	Allegany	57 min
Jul 7, 7:12 PM EDT	Severe Thunderstorm Warning	BUF	Allegany	33 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.