Alert archive / New York / Special Weather Statements in 2021

Special Weather Statement, NWS Buffalo, NY

July 12, 2021Chautauqua County, New York

NWS Buffalo, NY issued this special weather statement at Jul 12, 2021, 6:26 PM EDT for Chautauqua County, New York. It was in force for 64 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 12, 2021, 6:26 PM EDT (22:26 UTC)
Expired
Jul 12, 2021, 7:30 PM EDT
In force
64 min
Issued by
NWS Buffalo, NY

County Chautauqua County, NY

The radar

The Buffalo radar (KBUF), 77 km from the middle of the area, began a volume at 22:25 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, 10.4 hours before the alert went out and 77 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 2021-07-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°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 2021-07-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 42 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
524 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
42 m²/s²
0-3 km storm-relative helicity
114 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

586 
WWUS81 KBUF 122226
SPSBUF

Special Weather Statement
National Weather Service Buffalo NY
626 PM EDT Mon Jul 12 2021

NYZ019-020-085-122330-
Chautauqua-Cattaraugus-Southern Erie-
626 PM EDT Mon Jul 12 2021

...HEAVY RAIN POSSIBLE FOR CHAUTAUQUA...SOUTHERN ERIE AND 
CATTARAUGUS COUNTIES...

At 623 PM EDT, a line of showers was located along a line from near 
Jamestown to near Gowanda. This line of showers is expected to cause 
periods of heavy rainfall over the next one to two hours in portions 
of Chautauqua, Cattaraugus, and Southern Erie counties. 

Poor drainage flooding and ponding of water on area roadways will be 
possible during this time. Heavy rainfall will also cause conditions 
to change quickly on area roadways, please allow yourself extra time 
to reach your destination. 

LAT...LON 4266 7875 4256 7847 4200 7929 4200 7976
      4202 7976
$$

Welch

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 12, 2:46 AM EDTSpecial Weather StatementBUFJefferson, Lewis, Oswego89 min
Jul 12, 9:02 AM EDTFlash Flood WatchBUFAllegany, Cattaraugus, Chautauqua12 hr

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.