Alert archive / New York / Special Weather Statements in 2021

Special Weather Statement, NWS Buffalo, NY

August 1, 2021Jefferson County, New York

NWS Buffalo, NY issued this special weather statement at Aug 1, 2021, 3:24 PM EDT for Jefferson County, New York. It was in force for 81 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 1, 2021, 3:24 PM EDT (19:24 UTC)
Expired: Aug 1, 2021, 4:45 PM EDT
In force: 81 min
Issued by: NWS Buffalo, NY

County Jefferson County, NY

The radar

The Ft Drum radar (KTYX), 32 km from the middle of the area, began a volume at 19:27 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, 7.4 hours before the alert went out and 223 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: 1357 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 138 m²/s²
0-3 km storm-relative helicity: 179 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

157 
WWUS81 KBUF 011924
SPSBUF

Special Weather Statement
National Weather Service Buffalo NY
324 PM EDT Sun Aug 1 2021

NYZ007-008-012045-
Jefferson-Lewis-
324 PM EDT Sun Aug 1 2021

...AN AREA OF THUNDERSTORMS WITH HEAVY RAINFALL WILL AFFECT CENTRAL 
JEFFERSON AND NORTHERN LEWIS COUNTIES...

At 319 PM EDT, thunderstorms were clustered near Watertown and 
the Fort Drum area, moving east at 25 mph.

Torrential rainfall from these storms will produce poor drainage 
flooding and ponding of water in low lying areas. If driving through 
these storms, visibilities will be reduced to near half a mile or 
less.

Locations impacted include...
Watertown, Fort Drum, Carthage, Lowville, West Carthage, Adams,
Dexter, Glen Park, Herrings, Adams Center, Henderson Harbor, Barnes
Corners, Denmark, New Bremen, Sackets Harbor, Henderson, Black River,
Smithville, Philadelphia and Rodman.

This includes Interstate 81 between exits 41 and 48.
 
Do not drive your vehicle through flooded roadways.

LAT...LON 4375 7588 4392 7649 4396 7644 4396 7638
      4395 7634 4400 7635 4411 7604 4425 7552
      4410 7517 4381 7513
TIME...MOT...LOC 1919Z 267DEG 21KT 4397 7576 
$$

Thomas

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 1, 7:30 AM EDT	Special Weather Statement	BUF	Erie	45 min
Aug 1, 9:55 AM EDT	Special Weather Statement	BUF	Livingston	35 min
Aug 1, 10:08 AM EDT	Special Weather Statement	BUF	Chautauqua	37 min
Aug 1, 10:11 AM EDT	Special Weather Statement	BUF	Wyoming	34 min
Aug 1, 10:44 AM EDT	Special Weather Statement	BUF	Chautauqua	46 min
Aug 1, 10:47 AM EDT	Special Weather Statement	BUF	Allegany	43 min
Aug 1, 11:14 AM EDT	Special Weather Statement	BUF	Lewis	46 min
Aug 1, 11:33 AM EDT	Special Weather Statement	BUF	Cattaraugus	42 min
Aug 1, 12:07 PM EDT	Special Marine Warning	BUF		83 min
Aug 1, 12:18 PM EDT	Special Weather Statement	BUF	Allegany	42 min
Aug 1, 12:42 PM EDT	Severe Thunderstorm Warning	BUF	Allegany	48 min
Aug 1, 1:38 PM EDT	Special Weather Statement	BUF	Allegany	82 min
Aug 1, 5:14 PM EDT	Special Weather Statement	BUF	Ontario	46 min
Aug 1, 5:34 PM EDT	Special Marine Warning	BUF		116 min
Aug 1, 6:20 PM EDT	Special Marine Warning	BUF		85 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.