Alert archive / New York / Special Weather Statements in 2020

Special Weather Statement, NWS Buffalo, NY

August 16, 2020Jefferson County, New York

NWS Buffalo, NY issued this special weather statement at Aug 16, 2020, 11:54 PM EDT for Jefferson County, New York. It was in force for 66 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 16, 2020, 11:54 PM EDT (03:54 UTC)
Expired: Aug 17, 2020, 1:00 AM EDT
In force: 66 min
Issued by: NWS Buffalo, NY

County Jefferson County, NY

The radar

The Ft Drum radar (KTYX), 67 km from the middle of the area, began a volume at 03:54 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, 3.9 hours before the alert went out and 269 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: 493 J/kg
Mixed-layer CIN: -11 J/kg
Mixed-layer LCL: 1043 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 47 m²/s²
0-3 km storm-relative helicity: 84 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.6

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Buffalo, NY wrote its last area forecast discussion before this special weather statement went out at Aug 16, 10:43 PM EDT, 1 hour 11 minutes earlier.

Area forecast discussion, Aug 16, 10:43 PM EDT, 1 hour 11 minutes before

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Hazardous weather outlook, Aug 16, 5:12 AM EDT, 18 hours 42 minutes before

Hazardous Weather Outlook
National Weather Service Buffalo NY
512 AM EDT Sun Aug 16 2020

NYZ001>008-010>014-019>021-085-170915-
Niagara-Orleans-Monroe-Wayne-Northern Cayuga-Oswego-Jefferson-Lewis-
Northern Erie-Genesee-Wyoming-Livingston-Ontario-Chautauqua-
Cattaraugus-Allegany-Southern Erie-
512 AM EDT Sun Aug 16 2020

This Hazardous Weather Outlook is for western and north central New
York.

.DAY ONE...Today and tonight.

Hazardous weather is not expected at this time.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

There is a Marginal Risk for severe thunderstorms Monday with
damaging winds being the primary threat.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

This product, along with other watches, warnings, advisories, and
statements issued by the National Weather Service office in Buffalo
can be found on the internet at http://www.weather.gov/buf

LEZ020-040-041-LOZ030-042>045-062>065-SLZ022-024-170915-
Upper Niagara River and Buffalo Harbor-
Lake Erie nearshore waters from Ripley to Dunkirk-
Lake Erie nearshore waters from Dunkirk to Buffalo-
Lower Niagara River-
Lake Ontario nearshore waters from the Niagara River to Hamlin Beach-
Lake Ontario nearshore waters from Hamlin Beach to Sodus Bay-
Lake Ontario nearshore waters from Sodus Bay to Mexico Bay-
Lake Ontario nearshore waters from Mexico Bay to the Saint Lawrence
River-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
Lake Ontario open waters from Hamlin Beach to Sodus Bay-
Lake Ontario open waters from Sodus Bay to Mexico Bay-
Lake Ontario open waters from Mexico Bay to the Saint Lawrence River-
Saint Lawrence River from Cape Vincent to Ogdensburg-
Saint Lawrence River from Ogdensburg to Saint Regis-
512 AM EDT Sun Aug 16 2020

This Hazardous Weather Outlook is for the New York waters of Lake
Erie, Lake Ontario, and the Saint Lawrence River.

.DAY ONE...Today and tonight.

Hazardous weather is not expected at this time.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

There is a Marginal Risk for severe thunderstorms Monday with strong
winds being the primary threat.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

This product, along with other watches, warnings, advisories, and
statements issued by the National Weather Service office in Buffalo
can be found on the internet at http://www.weather.gov/buf

In the hours before

Special weather statement, Aug 16, 7:25 PM EDT, 4 hours 29 minutes before

Special Weather Statement
National Weather Service Buffalo NY
725 PM EDT Sun Aug 16 2020

NYZ002-003-170000-
Orleans-Monroe-
725 PM EDT Sun Aug 16 2020

...A STRONG THUNDERSTORM WILL AFFECT SOUTHEASTERN ORLEANS AND
NORTHWESTERN MONROE COUNTIES...

At 724 PM EDT, a strong thunderstorm was located over Holley, or near
Brockport, moving east at 20 mph.

Winds in excess of 40 mph and pea size hail are possible with this
storm, along with brief torrential downpours.

Locations impacted include...
Brockport, Spencerport, Holley, Clarendon.

Torrential rainfall is occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

LAT...LON 4316 7814 4325 7817 4333 7787 4324 7783
      4315 7781
TIME...MOT...LOC 2324Z 255DEG 19KT 4322 7804

Hitchcock

Special weather statement, Aug 16, 7:49 PM EDT, 4 hours 5 minutes before

Special Weather Statement
National Weather Service Buffalo NY
749 PM EDT Sun Aug 16 2020

NYZ003-170015-
Monroe-
749 PM EDT Sun Aug 16 2020

...A STRONG THUNDERSTORM WILL AFFECT NORTHERN MONROE COUNTY...

At 748 PM EDT, a strong thunderstorm was located near Clarkson,
moving east at 25 mph.

Winds in excess of 30 mph and pea size hail are possible with this
storm along with brief, torrential downpours.

Locations impacted include...
Clarkson, Greece, Irondequoit, Brockport, Hilton, Spencerport,
Charlotte and Braddock Bay.

Torrential rainfall is occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

LAT...LON 4328 7754 4329 7750 4321 7746 4318 7791
      4331 7797 4338 7775
TIME...MOT...LOC 2348Z 253DEG 20KT 4326 7785

Hitchcock

Special weather statement, Aug 16, 10:31 PM EDT, 1 hour 23 minutes before

Special Weather Statement
National Weather Service Buffalo NY
1031 PM EDT Sun Aug 16 2020

NYZ007-170330-
Jefferson-
1031 PM EDT Sun Aug 16 2020

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT CENTRAL JEFFERSON
COUNTY...

At 1029 PM EDT, radar indicated strong thunderstorms were located
along a line extending from 7 miles southwest of Cedar Point State
Park to near Stony Point. Movement was northeast at 20 mph.

Winds in excess of 30 mph and pea size hail are possible with these
storms along with torrential downpours.

Locations impacted include...
Watertown, Stony Point, Clayton, Adams, Dexter, Adams Center,
Henderson Harbor, Wellesley Island State Park, Cedar Point State
Park, Southwick Beach State Park, Sackets Harbor, Henderson,
Smithville, Rodman, Brownville, Alexandria Bay, Cape Vincent,
Chaumont.

This includes Interstate 81 between exits 41 and 52.

Torrential rainfall is occurring with these storms, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

LAT...LON 4388 7584 4380 7585 4379 7583 4372 7627
      4378 7629 4383 7636 4387 7635 4387 7638
      4396 7639 4396 7634 4402 7636 4404 7639
      4412 7639 4414 7635 4420 7631 4420 7624
      4424 7617 4429 7615 4435 7595 4438 7590
TIME...MOT...LOC 0229Z 244DEG 18KT 4414 7632 4381 7631

Hitchcock

Special weather statement, Aug 16, 11:54 PM EDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 16, 10:31 PM EDT	Special Weather Statement	BUF	Jefferson	59 min
Aug 17, 2:44 PM EDT	Special Marine Warning	BUF		2 hr
Aug 17, 3:31 PM EDT	Special Weather Statement	BUF	Niagara	29 min
Aug 17, 3:59 PM EDT	Special Marine Warning	BUF		90 min
Aug 17, 4:06 PM EDT	Special Weather Statement	BUF	Monroe	24 min

Nearby

Special Weather Statements in New York, 2020 Every special weather statement in 2020

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.