Alert archive / New York / Special Weather Statements in 2021

Special Weather Statement, NWS Buffalo, NY

February 6, 2021Jefferson County, New York

NWS Buffalo, NY issued this special weather statement at Feb 6, 2021, 4:55 AM EST for Jefferson County, New York. It was in force for 50 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 6, 2021, 4:55 AM EST (09:55 UTC)
Expired
Feb 6, 2021, 5:45 AM EST
In force
50 min
Issued by
NWS Buffalo, NY

County Jefferson County, NY

The radar

The Ft Drum radar (KTYX), 41 km from the middle of the area, began a volume at 09:56 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 00:00Z, 9.9 hours before the alert went out and 224 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-pSkew-T log-p diagram, Albany, NY at 00:00Z on 2021-02-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Albany, NY at 00:00Z on 2021-02-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 56 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
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
1059 m above ground
0-6 km bulk shear
94 kt
0-1 km storm-relative helicity
56 m²/s²
0-3 km storm-relative helicity
130 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

647 
WWUS81 KBUF 060955
SPSBUF

Special Weather Statement
National Weather Service Buffalo NY
455 AM EST Sat Feb 6 2021

NYZ007-061045-
Jefferson-
455 AM EST Sat Feb 6 2021

...A BAND OF LAKE EFFECT SNOW WILL AFFECT JEFFERSON COUNTY...

At 451 AM EST, A band of lake effect snow producing snow fall rates 
of up to 1 inch per hour extended from the north sides of Watertown 
and Fort Drum to Chaumont and Theresa. This band will remain nearly 
stationary through 6 am.

Locations impacted include...
Watertown, Fort Drum, Dexter, Glen Park, Adams Center, Henderson
Harbor, Southwick Beach State Park, Sackets Harbor, Henderson, Black
River, Smithville, Philadelphia, Brownville, Theresa, Antwerp,
Chaumont, Evans Mills, Deferiet, Three Mile Bay and Calcium.

 This includes Interstate 81 between exits 42 and 49.
 
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 4422 7545 4411 7554 4373 7622 4411 7635
      4432 7566

$$

TMA

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 6, 4:45 AM ESTSpecial Weather StatementBUFErie90 min
Feb 6, 8:34 AM ESTSpecial Weather StatementBUFErie, Genesee86 min
Feb 6, 10:17 AM ESTSpecial Weather StatementBUFGenesee88 min
Feb 6, 4:41 PM ESTSpecial Weather StatementBUFJefferson49 min

Nearby

Special Weather Statements in New York, 2021Every 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.