Alert archive / New York / Special Weather Statements in 2021

Special Weather Statement, NWS Buffalo, NY

August 11, 2021Genesee County, Monroe County, New York

NWS Buffalo, NY issued this special weather statement at Aug 11, 2021, 7:39 AM EDT for Genesee County, Monroe County, New York. It was in force for 81 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Aug 11, 2021, 7:39 AM EDT (11:39 UTC)
Expired: Aug 11, 2021, 9:00 AM EDT
In force: 81 min
Issued by: NWS Buffalo, NY
Hail: 0.00 in
Wind: 40

Counties Genesee County, NY, Monroe County, NY

The radar

The Buffalo radar (KBUF), 57 km from the middle of the area, began a volume at 11:37 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.

What was reported inside it

Time	Report	Where	Remark
Aug 11, 8:00 AM EDT	TSTM WND DMG	1 Ne Mumford, NY	TREES DOWN ON SCOTTSVILLE MUMFORD ROAD AND BELCODA RD.
Aug 11, 8:16 AM EDT	TSTM WND DMG	2 Nw Brighton, NY	TREE DOWN ON POPLAR STREET IN ROCHESTER.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 00:00Z, 11.7 hours before the alert went out and 55 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: 1071 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 910 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 97 m²/s²
0-3 km storm-relative helicity: 170 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.0

Open this sounding in Storm Lab

The text

As transmitted.

535 
WWUS81 KBUF 111139
SPSBUF

Special Weather Statement
National Weather Service Buffalo NY
739 AM EDT Wed Aug 11 2021
 
NYZ001>003-011-013-111300-
Livingston NY-Orleans NY-Genesee NY-Monroe NY-Niagara NY-
739 AM EDT Wed Aug 11 2021

...An area of strong thunderstorms will impact portions of north 
central Livingston, east central Niagara, Orleans, Genesee and 
Monroe Counties through 900 AM EDT...

At 739 AM EDT, Doppler radar was tracking an area of strong 
thunderstorms near Oakfield, or near Batavia, moving east at 30 mph.

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...
Rochester, Greece, Irondequoit, Chili, Batavia, Brockport, Medina,
Albion, Hilton, Brighton, Gates-North Gates, Darien Lakes State Park,
Hamlin Beach State Park, Henrietta, Le Roy, Pembroke, Spencerport,
Avon, Honeoye Falls and Byron.

This includes the following highways...
 Interstate 390 between exits 11 and 12.
 Interstate 90 between exits 48A and 46.

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.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 4305 7847 4308 7846 4308 7847 4323 7851
      4340 7793 4339 7775 4333 7763 4294 7754
      4294 7758 4293 7757 4287 7842
TIME...MOT...LOC 1139Z 250DEG 26KT 4302 7829 

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

$$

Reynolds

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 10, 9:29 PM EDT	Special Weather Statement	BUF	Jefferson	31 min
Aug 10, 10:04 PM EDT	Special Weather Statement	BUF	Lewis	41 min
Aug 10, 10:47 PM EDT	Flash Flood Warning	BUF	Jefferson, Lewis	5 hr
Aug 11, 4:38 AM EDT	Special Weather Statement	BUF	Chautauqua, Erie, Niagara	52 min
Aug 11, 5:37 AM EDT	Special Weather Statement	BUF	Chautauqua	53 min
Aug 11, 5:41 AM EDT	Special Marine Warning	BUF		64 min
Aug 11, 6:09 AM EDT	Severe Thunderstorm Warning	BUF	Cattaraugus, Chautauqua, Erie	51 min
Aug 11, 6:27 AM EDT	Special Marine Warning	BUF		93 min
Aug 11, 6:40 AM EDT	Severe Thunderstorm Warning	BUF	Erie, Genesee, Wyoming	65 min
Aug 11, 6:48 AM EDT	Special Marine Warning	BUF		42 min
Aug 11, 7:16 AM EDT	Severe Thunderstorm Warning	BUF	Allegany, Cattaraugus, Genesee, Livingston, Monroe, Wyoming	59 min
Aug 11, 7:46 AM EDT	Severe Thunderstorm Warning	BUF	Genesee, Livingston, Monroe, Ontario, Orleans	50 min
Aug 11, 7:55 AM EDT	Severe Thunderstorm Warning	BUF	Livingston, Monroe, Ontario, Wayne	50 min
Aug 11, 8:09 AM EDT	Special Marine Warning	BUF		96 min
Aug 11, 8:25 AM EDT	Special Weather Statement	BUF	Wayne	65 min
Aug 11, 9:18 AM EDT	Special Weather Statement	BUF	Oswego	27 min
Aug 11, 1:44 PM EDT	Small Craft Advisory	BUF		6 hr
Aug 11, 6:52 PM EDT	Special Weather Statement	BUF	Chautauqua	38 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.