Alert archive / New York / Special Weather Statements in 2021

Special Weather Statement, NWS Buffalo, NY

July 20, 2021Lewis County, New York

NWS Buffalo, NY issued this special weather statement at Jul 20, 2021, 6:46 PM EDT for Lewis County, New York. It was in force for 29 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: Jul 20, 2021, 6:46 PM EDT (22:46 UTC)
Expired: Jul 20, 2021, 7:15 PM EDT
In force: 29 min
Issued by: NWS Buffalo, NY

County Lewis County, NY

The radar

The Ft Drum radar (KTYX), 32 km from the middle of the area, began a volume at 22:50 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

Albany, NY (KALY), launched 12:00Z, 10.8 hours before the alert went out and 160 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: 85 J/kg
Mixed-layer CIN: -145 J/kg
Mixed-layer LCL: 793 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 45 m²/s²
0-3 km storm-relative helicity: 95 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

818 
WWUS81 KBUF 202246
SPSBUF

Special Weather Statement
National Weather Service Buffalo NY
646 PM EDT Tue Jul 20 2021

NYZ008-202315-
Lewis-
646 PM EDT Tue Jul 20 2021

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT SOUTHEASTERN LEWIS
COUNTY...

At 645 PM EDT, radar indicated strong thunderstorms were located
along a line extending from 6 miles east of Highmarket to 9 miles
north of Taberg. Movement was east at 35 mph.

Wind gusts up to 50 mph and pea size hail are possible with these
storms.

Locations impacted include...
Highmarket, Lyonsdale, Greig, Port Leyden, Lyons Falls,
Constableville, Turin, Mohawk Hill, Swancott Mill, West Leyden,
Talcottville and Brantingham.

If outdoors, consider seeking shelter inside a building.

LAT...LON 4342 7553 4346 7572 4369 7542 4372 7512
      4361 7511
TIME...MOT...LOC 2245Z 266DEG 30KT 4361 7540 4343 7556 
$$

Welch

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 20, 2:13 PM EDT	Special Marine Warning	BUF		62 min
Jul 20, 2:57 PM EDT	Special Weather Statement	BUF	Niagara	48 min
Jul 20, 3:14 PM EDT	Special Marine Warning	BUF		61 min
Jul 20, 3:23 PM EDT	Severe Thunderstorm Warning	BUF	Niagara	67 min
Jul 20, 3:39 PM EDT	Special Marine Warning	BUF		81 min
Jul 20, 3:48 PM EDT	Special Marine Warning	BUF		87 min
Jul 20, 4:08 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis	67 min
Jul 20, 4:23 PM EDT	Severe Thunderstorm Warning	BUF	Erie, Genesee, Niagara, Orleans	67 min
Jul 20, 4:42 PM EDT	Severe Thunderstorm Warning	BUF	Niagara	48 min
Jul 20, 4:46 PM EDT	Special Marine Warning	BUF		59 min
Jul 20, 4:49 PM EDT	Flash Flood Warning	BUF	Niagara	6 hr
Jul 20, 4:55 PM EDT	Special Marine Warning	BUF		48 min
Jul 20, 4:58 PM EDT	Special Marine Warning	BUF		92 min
Jul 20, 5:00 PM EDT	Special Weather Statement	BUF	Genesee	30 min
Jul 20, 5:10 PM EDT	Special Marine Warning	BUF		2 hr
Jul 20, 5:13 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis, Oswego	62 min
Jul 20, 5:28 PM EDT	Special Weather Statement	BUF	Oswego	47 min
Jul 20, 5:30 PM EDT	Severe Thunderstorm Warning	BUF	Erie, Genesee, Niagara, Orleans	60 min
Jul 20, 5:43 PM EDT	Special Marine Warning	BUF		92 min
Jul 20, 5:43 PM EDT	Severe Thunderstorm Warning	BUF	Oswego	62 min
Jul 20, 5:56 PM EDT	Special Weather Statement	BUF	Genesee, Monroe, Ontario, Orleans	34 min
Jul 20, 6:07 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Jefferson, Lewis, Oswego, Wayne	38 min
Jul 20, 6:21 PM EDT	Flash Flood Warning	BUF	Erie, Niagara	4 hr
Jul 20, 6:26 PM EDT	Special Marine Warning	BUF		34 min
Jul 20, 6:30 PM EDT	Special Weather Statement	BUF	Erie, Genesee	30 min
Jul 20, 6:37 PM EDT	Severe Thunderstorm Warning	BUF	Erie, Genesee, Niagara	46 min
Jul 20, 6:52 PM EDT	Special Marine Warning	BUF		67 min
Jul 20, 7:24 PM EDT	Special Weather Statement	BUF	Erie, Genesee, Livingston, Ontario, Wyoming	36 min
Jul 20, 7:38 PM EDT	Severe Thunderstorm Warning	BUF	Livingston, Monroe, Ontario, Wayne	31 min
Jul 20, 7:58 PM EDT	Special Weather Statement	BUF	Livingston, Wyoming	92 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.