Alert archive / New York / Special Weather Statements in 2021

Special Weather Statement, NWS Buffalo, NY

July 7, 2021Allegany County, Cattaraugus County, Chautauqua County, New York

NWS Buffalo, NY issued this special weather statement at Jul 7, 2021, 8:04 PM EDT for Allegany County, Cattaraugus County, Chautauqua County, New York. It was in force for 56 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 7, 2021, 8:04 PM EDT (00:04 UTC)
Expired: Jul 7, 2021, 9:00 PM EDT
In force: 56 min
Issued by: NWS Buffalo, NY

Counties Allegany County, NY, Cattaraugus County, NY, Chautauqua County, NY

The radar

The Buffalo radar (KBUF), 80 km from the middle of the area, began a volume at 00:06 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 7, 8:09 PM EDT	TSTM WND DMG	Ischua, NY	TREE DOWN ACROSS MARTINS CORNERS RD

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 00:00Z, 0.1 hours before the alert went out and 79 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: 105 J/kg
Mixed-layer CIN: -202 J/kg
Mixed-layer LCL: 707 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 130 m²/s²
0-3 km storm-relative helicity: 179 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.9

Open this sounding in Storm Lab

The text

As transmitted.

978 
WWUS81 KBUF 080004
SPSBUF

Special Weather Statement
National Weather Service Buffalo NY
804 PM EDT Wed Jul 7 2021

NYZ019>021-080100-
Chautauqua-Cattaraugus-Allegany-
804 PM EDT Wed Jul 7 2021

...A STRONG THUNDERSTORM WILL AFFECT CATTARAUGUS...CHAUTAUQUA AND
ALLEGANY COUNTIES...

At 802 PM EDT, doppler radar indicated a large area of rain and 
embedded thunderstorms across the Southern Tier. These storms may 
produce wind gusts up to 35 mph, pea size hail, and torrential 
downpours. 

Locations impacted include...
Jamestown, Olean, Dunkirk, Fredonia, Salamanca, Wellsville, Allegany
State Park, Alfred, Westfield, Lakewood, Silver Creek, Falconer, 
Ashford, Allegany, Franklinville, Mayville, Belfast, Cuba, 
and Rushford.

This includes the following highways...
 Interstate 90 between exits 60 and 59.
 Interstate 86 between exits 6 and 33.

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

LAT...LON 4200 7958 4228 7973 4229 7974 4231 7977
      4258 7919 4244 7892 4235 7864 4247 7772
      4200 7775
TIME...MOT...LOC 0002Z 246DEG 34KT 4220 7854 
$$

Hitchcock

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 7, 8:39 PM EDT	Flash Flood Warning	BUF	Allegany	3 hr
Jul 8, 12:48 PM EDT	Special Weather Statement	BUF	Niagara	27 min
Jul 8, 1:40 PM EDT	Special Weather Statement	BUF	Niagara	35 min
Jul 8, 2:18 PM EDT	Special Weather Statement	BUF	Orleans	42 min
Jul 8, 3:08 PM EDT	Special Weather Statement	BUF	Niagara	67 min
Jul 8, 3:23 PM EDT	Special Marine Warning	BUF		37 min
Jul 8, 3:34 PM EDT	Special Weather Statement	BUF	Erie	41 min
Jul 8, 3:41 PM EDT	Severe Thunderstorm Warning	BUF	Erie, Niagara	48 min
Jul 8, 3:48 PM EDT	Special Marine Warning	BUF		57 min
Jul 8, 4:13 PM EDT	Severe Thunderstorm Warning	BUF	Erie, Genesee, Niagara, Orleans	32 min
Jul 8, 4:16 PM EDT	Special Weather Statement	BUF	Oswego	44 min
Jul 8, 4:26 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis, Oswego	49 min
Jul 8, 4:29 PM EDT	Special Weather Statement	BUF	Monroe	61 min
Jul 8, 4:37 PM EDT	Special Marine Warning	BUF		53 min
Jul 8, 4:45 PM EDT	Special Weather Statement	BUF	Genesee, Monroe	30 min
Jul 8, 4:53 PM EDT	Flash Flood Warning	BUF	Monroe, Wayne	3 hr
Jul 8, 5:09 PM EDT	Special Weather Statement	BUF	Lewis	51 min
Jul 8, 5:12 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis, Oswego	63 min
Jul 8, 6:15 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis	60 min
Jul 8, 7:52 PM EDT	Special Weather Statement	BUF	Lewis	38 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.