Alert archive / New York / Special Weather Statements in 2021

Special Weather Statement, NWS Buffalo, NY

August 27, 2021Allegany County, New York

NWS Buffalo, NY issued this special weather statement at Aug 27, 2021, 2:27 PM EDT for Allegany County, New York. It was in force for 48 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 27, 2021, 2:27 PM EDT (18:27 UTC)
Expired
Aug 27, 2021, 3:15 PM EDT
In force
48 min
Issued by
NWS Buffalo, NY
Hail
0.00 in
Wind
40

County Allegany County, NY

The radar

The Buffalo radar (KBUF), 108 km from the middle of the area, began a volume at 18:30 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, 6.5 hours before the alert went out and 105 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 2021-08-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 321 joules per kilogram.LCLLFCEL10008507005003002001001 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 2021-08-27The 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
321 J/kg
Mixed-layer CIN
-83 J/kg
Mixed-layer LCL
642 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
-42 m²/s²
0-3 km storm-relative helicity
-21 m²/s²
Significant tornado parameter
-0.0
Supercell composite
-0.2

Open this sounding in Storm Lab

The text

As transmitted.

788 
WWUS81 KBUF 271827
SPSBUF

Special Weather Statement
National Weather Service Buffalo NY
227 PM EDT Fri Aug 27 2021
 
NYZ021-271915-
Allegany NY-
227 PM EDT Fri Aug 27 2021

...A strong thunderstorm will impact portions of southwestern
Allegany County through 315 PM EDT...

At 226 PM EDT, Doppler radar was tracking a strong thunderstorm near
Wellsville. This storm was nearly stationary.

HAZARD...Winds in excess of 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around 
         unsecured objects.

Locations impacted include...
Wellsville, Scio, Richburg and Knight Creek. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building. 

Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 4204 7814 4217 7819 4222 7797 4207 7795
TIME...MOT...LOC 1826Z 208DEG 4KT 4212 7807 

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

$$

Apffel

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 27, 4:16 AM EDTBeach Hazards StatementBUFMonroe, Niagara, Orleans, Wayne24 hr
Aug 27, 2:58 PM EDTSpecial Weather StatementBUFAllegany, Cattaraugus92 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.