Alert archive / New York / Special Weather Statements in 2021

Special Weather Statement, NWS Buffalo, NY

May 25, 2021Livingston County, New York

NWS Buffalo, NY issued this special weather statement at May 25, 2021, 3:25 PM EDT for Livingston County, New York. It was in force for 35 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: May 25, 2021, 3:25 PM EDT (19:25 UTC)
Expired: May 25, 2021, 4:00 PM EDT
In force: 35 min
Issued by: NWS Buffalo, NY

County Livingston County, NY

The radar

The Buffalo radar (KBUF), 100 km from the middle of the area, began a volume at 19:26 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, 7.4 hours before the alert went out and 96 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: 6 J/kg
Mixed-layer CIN: -177 J/kg
Mixed-layer LCL: 1041 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 174 m²/s²
0-3 km storm-relative helicity: 171 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

529 
WWUS81 KBUF 251925
SPSBUF

Special Weather Statement
National Weather Service Buffalo NY
325 PM EDT Tue May 25 2021

NYZ012>014-252000-
Ontario-Livingston-Wyoming-
325 PM EDT Tue May 25 2021

...A STRONG THUNDERSTORM WILL AFFECT SOUTHEASTERN WYOMING...SOUTHERN
LIVINGSTON AND SOUTHWESTERN ONTARIO COUNTIES...

At 324 PM EDT, a strong thunderstorm was located over Letchworth
State Park, moving east at 30 mph.

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

Locations impacted include...
Geneseo, Dansville, Letchworth State Park, Perry, Mount Morris,
Conesus, Naples, Portageville, Honeoye, Hemlock, Groveland,
Springwater, Canadice, Nunda, Castile, Leicester, Perry Center,
Sonyea, Bristol Mountain and Hunt Hollow.

This includes Interstate 390 between exits 4 and 7.
 
If outdoors, consider seeking shelter inside a building.

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

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.

LAT...LON 4256 7807 4280 7799 4281 7724 4276 7725
      4276 7731 4273 7734 4267 7737 4258 7737
      4258 7766 4253 7766
TIME...MOT...LOC 1924Z 266DEG 26KT 4262 7796 
$$

Welch

The office that day

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

Issued	Product	Office	Counties	Lasted
May 25, 2:03 PM EDT	Special Weather Statement	BUF	Erie	42 min
May 25, 2:47 PM EDT	Special Weather Statement	BUF	Wyoming	43 min
May 25, 3:44 PM EDT	Severe Thunderstorm Warning	BUF	Livingston, Ontario	32 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.