Alert archive / New York / Special Weather Statements in 2021

Special Weather Statement, NWS Buffalo, NY

July 15, 2021Chautauqua County, New York

NWS Buffalo, NY issued this special weather statement at Jul 15, 2021, 8:12 PM EDT for Chautauqua County, New York. It was in force for 63 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 15, 2021, 8:12 PM EDT (00:12 UTC)
Expired: Jul 15, 2021, 9:15 PM EDT
In force: 63 min
Issued by: NWS Buffalo, NY

County Chautauqua County, NY

The radar

The Buffalo radar (KBUF), 109 km from the middle of the area, began a volume at 00:17 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 15, 8:40 PM EDT	TSTM WND DMG	Bemus Point, NY	TREE DOWN ON LAKESIDE DRIVE BLOCKING ROADWAY.

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, 0.2 hours before the alert went out and 109 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: 572 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 1363 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 110 m²/s²
0-3 km storm-relative helicity: 227 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 2.9

Open this sounding in Storm Lab

The text

As transmitted.

851 
WWUS81 KBUF 160012
SPSBUF

Special Weather Statement
National Weather Service Buffalo NY
812 PM EDT Thu Jul 15 2021

NYZ019-160115-
Chautauqua-
812 PM EDT Thu Jul 15 2021

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

At 811 PM EDT, a strong thunderstorm was near Findley Lake and 
moving east at 25 mph.

Winds in excess of 40 mph are possible with this storm.

Locations impacted include...
Jamestown, Westfield, Lakewood, Falconer, Mayville, Clymer, Long
Point State Park, Jamestown West, Chautauqua Institution, Findley
Lake, Frewsburg, Chautauqua, Busti, Portland, Ripley, Stockton,
Gerry, Brocton, Celoron and Mina.

This includes the following highways...
 Interstate 90 near exit 60.
 Interstate 86 between exits 4 and 13.

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.

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.

LAT...LON 4213 7976 4233 7971 4244 7919 4200 7911
      4200 7976
TIME...MOT...LOC 0011Z 269DEG 22KT 4217 7973 
$$

Reynolds

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 15, 8:06 PM EDT	Special Weather Statement	BUF	Erie	24 min
Jul 15, 8:18 PM EDT	Severe Thunderstorm Warning	BUF	Chautauqua	57 min
Jul 15, 9:21 PM EDT	Special Weather Statement	BUF	Cattaraugus	54 min
Jul 15, 10:48 PM EDT	Special Marine Warning	BUF		57 min
Jul 15, 11:09 PM EDT	Special Weather Statement	BUF	Jefferson	36 min
Jul 16, 2:13 PM EDT	Flash Flood Warning	BUF	Chautauqua	5 hr
Jul 16, 2:41 PM EDT	Flash Flood Watch	BUF	Allegany, Cattaraugus, Cayuga, Chautauqua, Erie, Genesee and 8 more	32 hr
Jul 16, 2:59 PM EDT	Flash Flood Warning	BUF	Cattaraugus, Chautauqua	4 hr
Jul 16, 4:45 PM EDT	Small Craft Advisory	BUF		44 hr
Jul 16, 4:49 PM EDT	Areal Flood Warning	BUF	Chautauqua	6 hr
Jul 16, 7:14 PM EDT	Areal Flood Warning	BUF	Chautauqua	6 hr

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.