Alert archive / New York / Special Weather Statements in 2021

Special Weather Statement, NWS Buffalo, NY

July 13, 2021Monroe County, New York

NWS Buffalo, NY issued this special weather statement at Jul 13, 2021, 2:45 PM EDT for Monroe County, New York. It was in force for 30 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 13, 2021, 2:45 PM EDT (18:45 UTC)
Expired: Jul 13, 2021, 3:15 PM EDT
In force: 30 min
Issued by: NWS Buffalo, NY

County Monroe County, NY

The radar

The Buffalo radar (KBUF), 80 km from the middle of the area, began a volume at 18:48 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 12:00Z, 6.8 hours before the alert went out and 78 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: 610 J/kg
Mixed-layer CIN: -36 J/kg
Mixed-layer LCL: 907 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 56 m²/s²
0-3 km storm-relative helicity: 90 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.9

Open this sounding in Storm Lab

The text

As transmitted.

171 
WWUS81 KBUF 131845
SPSBUF

Special Weather Statement
National Weather Service Buffalo NY
245 PM EDT Tue Jul 13 2021

NYZ002-003-131915-
Orleans-Monroe-
245 PM EDT Tue Jul 13 2021

...A STRONG THUNDERSTORM WILL AFFECT EAST CENTRAL ORLEANS AND
NORTHWESTERN MONROE COUNTIES...

At 244 PM EDT, a strong thunderstorm was located over Brockport,
moving northeast at 35 mph.

Winds in excess of 40 mph and half inch hail are possible with this
storm.

Locations impacted include...
Greece, Brockport, Hilton, Hamlin Beach State Park, Spencerport,
Churchville, Holley and Braddock Bay.

If outdoors, consider seeking shelter inside a building.

LAT...LON 4339 7775 4335 7767 4331 7761 4310 7786
      4312 7791 4313 7791 4313 7796 4317 7807
      4340 7793
TIME...MOT...LOC 1844Z 215DEG 29KT 4323 7790 
$$

Welch

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 13, 3:40 AM EDT	Special Weather Statement	BUF	Lewis	50 min
Jul 13, 1:29 PM EDT	Special Weather Statement	BUF	Erie	46 min
Jul 13, 1:56 PM EDT	Special Marine Warning	BUF		64 min
Jul 13, 3:40 PM EDT	Special Marine Warning	BUF		50 min
Jul 13, 4:34 PM EDT	Special Marine Warning	BUF		56 min
Jul 13, 4:41 PM EDT	Severe Thunderstorm Warning	BUF	Chautauqua	64 min
Jul 13, 4:46 PM EDT	Special Weather Statement	BUF	Wayne	44 min
Jul 13, 4:50 PM EDT	Severe Thunderstorm Warning	BUF	Oswego	55 min
Jul 13, 4:59 PM EDT	Special Marine Warning	BUF		46 min
Jul 13, 5:23 PM EDT	Severe Thunderstorm Warning	BUF	Oswego	45 min
Jul 13, 5:26 PM EDT	Special Marine Warning	BUF		64 min
Jul 13, 5:33 PM EDT	Special Marine Warning	BUF		42 min
Jul 13, 5:38 PM EDT	Severe Thunderstorm Warning	BUF	Cattaraugus, Chautauqua, Erie	52 min
Jul 13, 5:41 PM EDT	Severe Thunderstorm Warning	BUF	Lewis, Oswego	64 min
Jul 13, 5:43 PM EDT	Special Weather Statement	BUF	Monroe	32 min
Jul 13, 5:57 PM EDT	Severe Thunderstorm Warning	BUF	Allegany, Cattaraugus, Chautauqua, Erie, Wyoming	63 min
Jul 13, 6:05 PM EDT	Special Marine Warning	BUF		55 min
Jul 13, 6:07 PM EDT	Special Marine Warning	BUF		38 min
Jul 13, 6:08 PM EDT	Special Marine Warning	BUF		52 min
Jul 13, 6:09 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis	53 min
Jul 13, 6:19 PM EDT	Severe Thunderstorm Warning	BUF	Erie, Genesee, Niagara, Orleans	41 min
Jul 13, 6:46 PM EDT	Special Marine Warning	BUF		89 min
Jul 13, 6:55 PM EDT	Severe Thunderstorm Warning	BUF	Niagara, Orleans	50 min
Jul 13, 7:02 PM EDT	Special Marine Warning	BUF		58 min
Jul 13, 7:05 PM EDT	Special Weather Statement	BUF	Jefferson	25 min
Jul 13, 7:07 PM EDT	Special Marine Warning	BUF		53 min
Jul 13, 7:15 PM EDT	Severe Thunderstorm Warning	BUF	Genesee, Livingston, Monroe, Orleans, Wayne	60 min
Jul 13, 7:27 PM EDT	Special Marine Warning	BUF		93 min
Jul 13, 7:41 PM EDT	Special Marine Warning	BUF		94 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.