Alert archive / New York / Special Weather Statements in 2021

Special Weather Statement, NWS Buffalo, NY

July 18, 2021Genesee County, Orleans County, New York

NWS Buffalo, NY issued this special weather statement at Jul 18, 2021, 7:55 PM EDT for Genesee County, Orleans 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: Jul 18, 2021, 7:55 PM EDT (23:55 UTC)
Expired: Jul 18, 2021, 8:30 PM EDT
In force: 35 min
Issued by: NWS Buffalo, NY

Counties Genesee County, NY, Orleans County, NY

The radar

The Buffalo radar (KBUF), 37 km from the middle of the area, began a volume at 23:56 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

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 11.9 hours before the alert went out and 35 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: 4 J/kg
Mixed-layer CIN: -54 J/kg
Mixed-layer LCL: 881 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: -48 m²/s²
0-3 km storm-relative helicity: -61 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

456 
WWUS81 KBUF 182355
SPSBUF

Special Weather Statement
National Weather Service Buffalo NY
755 PM EDT Sun Jul 18 2021

NYZ002-003-010>012-190030-
Wyoming-Orleans-Genesee-Monroe-Northern Erie-
755 PM EDT Sun Jul 18 2021

...SCATTERED THUNDERSTORMS WILL AFFECT NORTHEASTERN WYOMING... 
NORTHEASTERN ERIE...EASTERN ORLEANS...GENESEE AND NORTHWESTERN 
MONROE COUNTIES...

At 753 PM EDT, a thunderstorm was located near Akron, moving south 
at 20 mph. Other thunderstorms were located near Albion and Kendall, 
moving south at 20 mph. 

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

Locations impacted include...
Clarence, Batavia, Brockport, Albion, Hamlin Beach State Park, 
Darien Lakes State Park, Pembroke, Akron, Alden, Oakfield, Holley, 
Point Breeze, Lakeside Beach State Park, Kent, Clarendon and Kendall.

This includes Interstate 90 between exits 48A and 48.
 
Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

LAT...LON 4292 7863 4307 7856 4310 7841 4317 7830
      4342 7821 4337 7789 4280 7804
TIME...MOT...LOC 2353Z 014DEG 18KT 4302 7848 
$$

Hitchcock

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 18, 6:21 PM EDT	Special Weather Statement	BUF	Orleans	39 min
Jul 18, 7:18 PM EDT	Special Weather Statement	BUF	Genesee	42 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.