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, 7:37 PM EDT for Chautauqua County, New York. It was in force for 38 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 15, 2021, 7:37 PM EDT (23:37 UTC)
Expired: Jul 15, 2021, 8:15 PM EDT
In force: 38 min
Issued by: NWS Buffalo, NY

County Chautauqua County, NY

The radar

The Buffalo radar (KBUF), 102 km from the middle of the area, began a volume at 23:39 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 12:00Z, 11.6 hours before the alert went out and 103 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: 15 J/kg
Mixed-layer CIN: -82 J/kg
Mixed-layer LCL: 1221 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 107 m²/s²
0-3 km storm-relative helicity: 122 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

028 
WWUS81 KBUF 152337
SPSBUF

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

NYZ019-160015-
Chautauqua-
737 PM EDT Thu Jul 15 2021

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT WESTERN CHAUTAUQUA 
COUNTY...

At 735 PM EDT, A line of strong thunderstorms were near North East, 
or 10 miles northeast of Erie and moving east at 35 mph.

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

Locations impacted include...
Dunkirk, Fredonia, Westfield, Lakewood, Mayville, Clymer, Long Point
State Park, Chautauqua Institution, Lake Erie State Park, Findley
Lake, SUNY Fredonia, Chautauqua, Portland, Ripley, Stockton, Brocton,
Mina, French Creek, Sherman and Panama.

This includes the following highways...
 Interstate 90 between exits 61 and 60.
 Interstate 86 between exits 4 and 10.

If outdoors, consider seeking shelter inside a building.

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 line of 
storms. Lightning can strike 10 miles away from a thunderstorm. Seek 
a safe shelter inside a building or vehicle.

This line of storms 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 4243 7953 4249 7934 4200 7933 4200 7976
      4227 7976 4228 7973 4231 7977
TIME...MOT...LOC 2335Z 270DEG 29KT 4219 7989 
$$

Reynolds

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 15, 7:26 PM EDT	Special Marine Warning	BUF		64 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.