Alert archive / New York / Special Weather Statements in 2021

Special Weather Statement, NWS Buffalo, NY

June 29, 2021Livingston County, Wyoming County, New York

NWS Buffalo, NY issued this special weather statement at Jun 29, 2021, 3:13 PM EDT for Livingston County, Wyoming County, New York. It was in force for 47 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jun 29, 2021, 3:13 PM EDT (19:13 UTC)
Expired: Jun 29, 2021, 4:00 PM EDT
In force: 47 min
Issued by: NWS Buffalo, NY

Counties Livingston County, NY, Wyoming County, NY

The radar

The Buffalo radar (KBUF), 60 km from the middle of the area, began a volume at 19:16 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.

What was reported inside it

Time	Report	Where	Remark
Jun 29, 3:40 PM EDT	TSTM WND DMG	1 W Warsaw, NY	FIVE TREES WERE REPORTED DOWN ONTO ROUTE 20A BETWEEN ROUTE 19 AND ROUTE 238.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 7.2 hours before the alert went out and 56 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: 627 J/kg
Mixed-layer CIN: -58 J/kg
Mixed-layer LCL: 1039 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 101 m²/s²
0-3 km storm-relative helicity: 122 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

Open this sounding in Storm Lab

The text

As transmitted.

086 
WWUS81 KBUF 291913
SPSBUF

Special Weather Statement
National Weather Service Buffalo NY
313 PM EDT Tue Jun 29 2021

NYZ012-013-292000-
Livingston-Wyoming-
313 PM EDT Tue Jun 29 2021

...A STRONG THUNDERSTORM WILL AFFECT WYOMING AND CENTRAL LIVINGSTON
COUNTIES...

At 312 PM EDT, a strong thunderstorm was located over Warsaw, or 11
miles northwest of Letchworth State Park, moving east at 35 mph.

Winds in excess of 40 mph and pea size hail are possible with this
storm.

Locations impacted include...
Geneseo, Letchworth State Park, Perry, Warsaw, Avon, Mount Morris,
Conesus, Portageville, York, Groveland, Nunda, Covington, Castile,
Silver Springs, Leicester, Wyoming, Gainesville, Hermitage, Perry
Center and Bliss.

This includes Interstate 390 between exits 6 and 8.
 
If outdoors, consider seeking shelter inside a building.

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

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

LAT...LON 4273 7838 4287 7799 4286 7796 4288 7796
      4294 7778 4258 7761 4256 7830
TIME...MOT...LOC 1912Z 252DEG 31KT 4271 7818 
$$

Reynolds

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 29, 2:05 PM EDT	Special Weather Statement	BUF	Erie	40 min
Jun 29, 2:16 PM EDT	Special Weather Statement	BUF	Cayuga	29 min
Jun 29, 2:49 PM EDT	Severe Thunderstorm Warning	BUF	Cattaraugus, Erie, Wyoming	56 min
Jun 29, 3:18 PM EDT	Severe Thunderstorm Warning	BUF	Livingston, Wyoming	45 min
Jun 29, 3:45 PM EDT	Special Marine Warning	BUF		60 min
Jun 29, 4:08 PM EDT	Special Weather Statement	BUF	Livingston	67 min
Jun 29, 4:39 PM EDT	Special Marine Warning	BUF		66 min
Jun 29, 4:54 PM EDT	Special Weather Statement	BUF	Erie	51 min
Jun 29, 5:47 PM EDT	Special Weather Statement	BUF	Wyoming	43 min
Jun 29, 6:01 PM EDT	Severe Thunderstorm Warning	BUF	Erie, Genesee, Wyoming	29 min
Jun 29, 7:26 PM EDT	Special Weather Statement	BUF	Allegany	34 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.