Alert archive / New York / Special Weather Statements in 2021

Special Weather Statement, NWS Buffalo, NY

August 1, 2021Chautauqua County, New York

NWS Buffalo, NY issued this special weather statement at Aug 1, 2021, 10:08 AM EDT for Chautauqua County, New York. It was in force for 37 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
Aug 1, 2021, 10:08 AM EDT (14:08 UTC)
Expired
Aug 1, 2021, 10:45 AM EDT
In force
37 min
Issued by
NWS Buffalo, NY

County Chautauqua County, NY

The radar

The Buffalo radar (KBUF), 66 km from the middle of the area, began a volume at 14:11 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, 2.1 hours before the alert went out and 65 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-pSkew-T log-p diagram, Buffalo Intl Airport, NY at 12:00Z on 2021-08-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 266 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Buffalo Intl Airport, NY at 12:00Z on 2021-08-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 78 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
266 J/kg
Mixed-layer CIN
-39 J/kg
Mixed-layer LCL
925 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
78 m²/s²
0-3 km storm-relative helicity
118 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

As transmitted.

019 
WWUS81 KBUF 011408
SPSBUF

Special Weather Statement
National Weather Service Buffalo NY
1008 AM EDT Sun Aug 1 2021

NYZ019-020-085-011445-
Chautauqua-Cattaraugus-Southern Erie-
1008 AM EDT Sun Aug 1 2021

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT NORTHWESTERN
CATTARAUGUS...SOUTHWESTERN ERIE AND NORTHERN CHAUTAUQUA COUNTIES...

At 1007 AM EDT, radar indicated strong thunderstorms were located
along a line extending from near Silver Creek to 6 miles east of
North East. Movement was east at 35 mph.

Winds in excess of 30 mph and pea size hail are possible with these
storms, along with brief torrential downpours.

Locations impacted include...
Fredonia, Westfield, Gowanda, Mayville, Chautauqua Institution, 
Concord, Collins, Portland, Sheridan, Ripley, Stockton, Gerry, 
Dayton, Brocton, Arkwright, Forestville, Cassadaga, South Dayton and 
Sinclairville.

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

LAT...LON 4257 7866 4218 7925 4224 7975 4254 7915
TIME...MOT...LOC 1407Z 260DEG 31KT 4250 7908 4222 7971 
$$

Hitchcock

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 1, 7:30 AM EDTSpecial Weather StatementBUFErie45 min
Aug 1, 9:55 AM EDTSpecial Weather StatementBUFLivingston35 min
Aug 1, 10:11 AM EDTSpecial Weather StatementBUFWyoming34 min
Aug 1, 10:44 AM EDTSpecial Weather StatementBUFChautauqua46 min
Aug 1, 10:47 AM EDTSpecial Weather StatementBUFAllegany43 min
Aug 1, 11:14 AM EDTSpecial Weather StatementBUFLewis46 min
Aug 1, 11:33 AM EDTSpecial Weather StatementBUFCattaraugus42 min
Aug 1, 12:07 PM EDTSpecial Marine WarningBUF83 min
Aug 1, 12:18 PM EDTSpecial Weather StatementBUFAllegany42 min
Aug 1, 12:42 PM EDTSevere Thunderstorm WarningBUFAllegany48 min
Aug 1, 1:38 PM EDTSpecial Weather StatementBUFAllegany82 min
Aug 1, 3:24 PM EDTSpecial Weather StatementBUFJefferson81 min
Aug 1, 5:14 PM EDTSpecial Weather StatementBUFOntario46 min
Aug 1, 5:34 PM EDTSpecial Marine WarningBUF116 min
Aug 1, 6:20 PM EDTSpecial Marine WarningBUF85 min

Nearby

Special Weather Statements in New York, 2021Every 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.