Alert archive / New York / Special Weather Statements in 2021

Special Weather Statement, NWS Buffalo, NY

July 2, 2021Cattaraugus County, Chautauqua County, Erie County, New York

NWS Buffalo, NY issued this special weather statement at Jul 2, 2021, 11:27 AM EDT for Cattaraugus County, Chautauqua County, Erie County, New York. It was in force for 2 hr. 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 2, 2021, 11:27 AM EDT (15:27 UTC)
Expired
Jul 2, 2021, 1:30 PM EDT
In force
2 hr
Issued by
NWS Buffalo, NY

Counties Cattaraugus County, NY, Chautauqua County, NY, Erie County, NY

The radar

The Buffalo radar (KBUF), 76 km from the middle of the area, began a volume at 15:28 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, 3.5 hours before the alert went out and 76 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 2021-07-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 348 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 2021-07-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -6 square meters per square second.193958Sfc1 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
348 J/kg
Mixed-layer CIN
-37 J/kg
Mixed-layer LCL
782 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
-6 m²/s²
0-3 km storm-relative helicity
34 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

633 
WWUS81 KBUF 021527
SPSBUF

Special Weather Statement
National Weather Service Buffalo NY
1127 AM EDT Fri Jul 2 2021

NYZ019-020-085-021730-
Chautauqua-Cattaraugus-Southern Erie-
1127 AM EDT Fri Jul 2 2021

...AN AREA OF STRONG THUNDERSTORMS WILL AFFECT CATTARAUGUS...
CHAUTAUQUA AND SOUTHERN ERIE COUNTIES...

At 1125 AM EDT, numerous strong thunderstorms were found across much 
of the southern tier. The slow moving...heavy rain producing storms 
were generally moving to the southwest at 15 mph.

Winds in excess of 30 mph are possible with these storms. There may 
even be pea sized hail in the stronger storms. 

Locations impacted include...
Jamestown, Dunkirk, Fredonia, Hamburg, East Aurora, Salamanca,
Allegany State Park, Evans, Boston, Eden, Springville, Colden,
Orchard Park, Westfield, Lakewood, Gowanda, Silver Creek, Falconer,
Ashford and Angola.

This includes the following highways...
 Interstate 90 between exits 61 and 57.
 Interstate 86 between exits 4 and 24.

Torrential rainfall is occurring with these storms, and could cause 
localized flooding. Localized rainfall amounts of one to two inches 
will be possible with many of these storms. Do not drive your 
vehicle through flooded roadways.

LAT...LON 4232 7977 4244 7950 4253 7939 4259 7919
      4271 7909 4277 7894 4277 7848 4200 7848
      4200 7976 4227 7976 4228 7973
TIME...MOT...LOC 1524Z 045DEG 13KT 4247 7906 
$$

RSH

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 1, 8:15 PM EDTSpecial Weather StatementBUFLivingston30 min
Jul 1, 8:45 PM EDTSpecial Weather StatementBUFNiagara30 min
Jul 1, 9:50 PM EDTSpecial Weather StatementBUFGenesee, Orleans40 min
Jul 1, 10:28 PM EDTFlash Flood WarningBUFGenesee93 min
Jul 2, 8:44 AM EDTSpecial Weather StatementBUFJefferson, Lewis, Oswego2 hr
Jul 2, 10:00 AM EDTSpecial Weather StatementBUFChautauqua90 min
Jul 2, 10:31 AM EDTSpecial Weather StatementBUFErie44 min
Jul 2, 11:12 AM EDTSpecial Weather StatementBUFWayne2 hr
Jul 2, 12:38 PM EDTSpecial Weather StatementBUFGenesee, Livingston, Monroe, Orleans, Wyoming112 min
Jul 2, 1:16 PM EDTSpecial Marine WarningBUF44 min
Jul 2, 1:36 PM EDTSpecial Weather StatementBUFAllegany, Cattaraugus, Chautauqua, Erie114 min
Jul 2, 2:20 PM EDTSpecial Weather StatementBUFNiagara, Orleans115 min
Jul 2, 2:26 PM EDTSpecial Marine WarningBUF34 min
Jul 2, 5:02 PM EDTSpecial Weather StatementBUFAllegany58 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.