Alert archive / New York / Special Weather Statements in 2021

Special Weather Statement, NWS Buffalo, NY

April 28, 2021Allegany County, New York

NWS Buffalo, NY issued this special weather statement at Apr 28, 2021, 3:56 PM EDT for Allegany County, New York. It was in force for 34 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
Apr 28, 2021, 3:56 PM EDT (19:56 UTC)
Expired
Apr 28, 2021, 4:30 PM EDT
In force
34 min
Issued by
NWS Buffalo, NY

County Allegany County, NY

The radar

The Buffalo radar (KBUF), 113 km from the middle of the area, began a volume at 19:56 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, 7.9 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-pSkew-T log-p diagram, Buffalo Intl Airport, NY at 12:00Z on 2021-04-28Temperature 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 2021-04-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 104 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1537 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
104 m²/s²
0-3 km storm-relative helicity
138 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

000 
WWUS81 KBUF 281956
SPSBUF

Special Weather Statement
National Weather Service Buffalo NY
356 PM EDT Wed Apr 28 2021

NYZ021-282030-
Allegany-
356 PM EDT Wed Apr 28 2021

...A STRONG THUNDERSTORM WILL AFFECT SOUTHERN ALLEGANY COUNTY...

At 355 PM EDT, a strong thunderstorm was located 8 miles southeast of
Cuba, or 10 miles west of Wellsville, moving east at 35 mph.

Winds in excess of 40 mph and half inch hail are possible with this
storm.

Locations impacted include...
Wellsville, Alfred, Whitesville, Friendship, Scio, Bolivar, Andover,
Belmont, Richburg, Stannards, Knight Creek, West Clarksville,
Paynesville and Little Genesee.

If outdoors, consider seeking shelter inside a building.

LAT...LON 4203 7827 4219 7826 4226 7774 4200 7775
      4200 7781
TIME...MOT...LOC 1955Z 270DEG 29KT 4213 7816 
$$

Hitchcock

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 28, 1:33 PM EDTSpecial Marine WarningBUF47 min
Apr 28, 1:54 PM EDTSpecial Weather StatementBUFMonroe, Wayne51 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.