Alert archive / New York / Special Weather Statements in 2021

Special Weather Statement, NWS Buffalo, NY

February 20, 2021Erie County, Wyoming County, New York

NWS Buffalo, NY issued this special weather statement at Feb 20, 2021, 4:42 AM EST for Erie County, Wyoming County, New York. It was in force for 78 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: Feb 20, 2021, 4:42 AM EST (09:42 UTC)
Expired: Feb 20, 2021, 6:00 AM EST
In force: 78 min
Issued by: NWS Buffalo, NY

Counties Erie County, NY, Wyoming County, NY

The radar

The Buffalo radar (KBUF), 37 km from the middle of the area, began a volume at 09:44 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 00:00Z, 9.7 hours before the alert went out and 34 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 862 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 24 m²/s²
0-3 km storm-relative helicity: 25 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

646 
WWUS81 KBUF 200942
SPSBUF

Special Weather Statement
National Weather Service Buffalo NY
442 AM EST Sat Feb 20 2021

NYZ010>012-019-020-085-201100-
Chautauqua-Cattaraugus-Southern Erie-Wyoming-Genesee-Northern Erie-
442 AM EST Sat Feb 20 2021

...A BAND OF LAKE EFFECT SNOW WILL AFFECT WYOMING...NORTHERN
CATTARAUGUS...SOUTHERN ERIE...NORTHEASTERN CHAUTAUQUA AND
SOUTHWESTERN GENESEE COUNTIES...

At 435 AM EST, A band of heavy lake effect snow producing snow fall 
rates of 1 to 2 inches per hour across southern Erie and western 
Wyoming county will remain stationary this morning. Expect 
additional accumulations of 5 to 7 inches of snow between now and 8 
am. Visibilities will also drop quickly to less than a quarter of a 
mile at times in this band of lake effect snow.

Locations impacted include...
West Seneca, Hamburg, East Aurora, Evans, Boston, Eden, Marilla,
Springville, Perry, Warsaw, Bennington, Colden, Orchard Park, Silver
Creek, Blasdell, Attica, Angola, Arcade, North Collins and Chaffee.

 This includes Interstate 90 between exits 58 and 57.
 
If outdoors, consider seeking shelter inside a building.

Icy roads are possible as the snow melts on the roads then quickly
refreezes.

LAT...LON 4259 7919 4273 7907 4291 7832 4282 7795
      4276 7795 4252 7813 4252 7831 4251 7831
      4248 7880 4255 7932

$$

Reynolds

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 20, 4:26 AM EST	Small Craft Advisory	BUF		21 hr
Feb 20, 6:51 AM EST	Special Weather Statement	BUF	Erie, Wyoming	84 min
Feb 20, 8:12 AM EST	Special Weather Statement	BUF	Erie	63 min
Feb 20, 8:42 AM EST	Special Weather Statement	BUF	Niagara, Orleans	63 min
Feb 20, 10:04 AM EST	Special Weather Statement	BUF	Orleans	56 min
Feb 20, 10:48 AM EST	Special Weather Statement	BUF	Erie, Genesee	57 min
Feb 20, 2:17 PM EST	Special Weather Statement	BUF	Genesee, Orleans	58 min
Feb 20, 2:23 PM EST	Special Weather Statement	BUF	Wyoming	52 min
Feb 20, 4:14 PM EST	Special Weather Statement	BUF	Genesee, Monroe, Niagara, Orleans	2 hr
Feb 20, 4:19 PM EST	Special Weather Statement	BUF	Erie	116 min
Feb 20, 6:16 PM EST	Special Weather Statement	BUF	Genesee, Niagara, Orleans	89 min

Nearby

Special Weather Statements in New York, 2021 Every 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.