Alert archive / New York / Special Weather Statements in 2021

Special Weather Statement, NWS Buffalo, NY

January 20, 2021Monroe County, Orleans County, Wayne County, New York

NWS Buffalo, NY issued this special weather statement at Jan 20, 2021, 5:51 AM EST for Monroe County, Orleans County, Wayne County, New York. It was in force for 54 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: Jan 20, 2021, 5:51 AM EST (10:51 UTC)
Expired: Jan 20, 2021, 6:45 AM EST
In force: 54 min
Issued by: NWS Buffalo, NY

Counties Monroe County, NY, Orleans County, NY, Wayne County, NY

The radar

The Buffalo radar (KBUF), 123 km from the middle of the area, began a volume at 10:55 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, 10.9 hours before the alert went out and 121 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: 922 m above ground
0-6 km bulk shear: 66 kt
0-1 km storm-relative helicity: 154 m²/s²
0-3 km storm-relative helicity: 199 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

810 
WWUS81 KBUF 201051
SPSBUF

Special Weather Statement
National Weather Service Buffalo NY
551 AM EST Wed Jan 20 2021

NYZ002>005-201145-
Orleans-Wayne-Monroe-Northern Cayuga-
551 AM EST Wed Jan 20 2021

...A SNOW SQUALL WILL AFFECT WAYNE...ORLEANS...CAYUGA AND NORTHERN
MONROE COUNTIES...

At 545 AM EST, a snow squall was located along the southern Lake 
Ontario shoreline from Orleans to northern Cayuga counties. This 
squall will move south and into the Rochester Metro, rapidly 
reducing visibilities down to a mile or less. 

Locations impacted include...
Rochester, Greece, Irondequoit, Brockport, East Rochester, Medina,
Albion, Hilton, Webster, Brighton, Gates-North Gates, Fair Haven
Beach State Park, Hamlin Beach State Park, Ontario, Penfield,
Williamson, Marion, Spencerport, Clyde and Sodus.

Conditions can deteriorate rapidly in winter weather situations. Be
prepared for snow or ice covered roads. Slow down and allow extra
time when traveling.

LAT...LON 4344 7661 4308 7659 4315 7843 4341 7847
      4342 7808 4339 7775 4328 7754 4332 7738
      4333 7717 4331 7697 4335 7681 4344 7667

$$

HSK

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 20, 6:47 AM EST	Special Weather Statement	BUF	Monroe, Orleans, Wayne	88 min
Jan 20, 8:01 AM EST	Special Weather Statement	BUF	Genesee, Ontario	59 min
Jan 20, 8:15 AM EST	Special Weather Statement	BUF	Cayuga	60 min
Jan 20, 8:42 AM EST	Special Weather Statement	BUF	Lewis, Oswego	78 min
Jan 20, 9:08 AM EST	Special Weather Statement	BUF	Livingston, Wyoming	112 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.