Alert archive / New York / Special Weather Statements in 2021

Special Weather Statement, NWS Buffalo, NY

October 4, 2021Allegany County, New York

NWS Buffalo, NY issued this special weather statement at Oct 4, 2021, 6:37 PM EDT for Allegany County, New York. It was in force for 53 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: Oct 4, 2021, 6:37 PM EDT (22:37 UTC)
Expired: Oct 4, 2021, 7:30 PM EDT
In force: 53 min
Issued by: NWS Buffalo, NY
Hail: 0.00 in
Wind: 30

County Allegany County, NY

The radar

The Buffalo radar (KBUF), 83 km from the middle of the area, began a volume at 22:41 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, 10.6 hours before the alert went out and 79 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: 353 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 460 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 77 m²/s²
0-3 km storm-relative helicity: 58 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

790 
WWUS81 KBUF 042237
SPSBUF

Special Weather Statement
National Weather Service Buffalo NY
637 PM EDT Mon Oct 4 2021
 
NYZ021-042330-
Allegany NY-
637 PM EDT Mon Oct 4 2021

...Showers and thunderstorms with very heavy rain will impact 
portions of northern Allegany County through 730 PM EDT...

At 634 PM EDT, Doppler radar was tracking showers and thunderstorms 
with very heavy rain extending along a line from Rushford to Burns 
and Almond, moving east at 10 mph.

HAZARD...Heavy rain.

SOURCE...Radar indicated.

IMPACT...Heavy rainfall could cause localized flooding of low lying 
         and poor drainage areas.

Locations impacted include...
Belfast, Rushford, Houghton, Caneadea, Canaseraga, Almond, Birdsall,
Short Tract, Hardy Corners and Fillmore.

This includes Interstate 86 near exit 33.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building. 

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

&&

LAT...LON 4233 7831 4248 7831 4247 7772 4231 7774
TIME...MOT...LOC 2234Z 270DEG 9KT 4240 7777 

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...<30 MPH

$$

JJR

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 4, 4:24 PM EDT	Special Weather Statement	BUF	Livingston	66 min
Oct 4, 4:47 PM EDT	Special Weather Statement	BUF	Livingston, Wyoming	58 min
Oct 4, 5:05 PM EDT	Special Weather Statement	BUF	Chautauqua	55 min
Oct 4, 5:27 PM EDT	Flash Flood Warning	BUF	Chautauqua	2 hr
Oct 4, 6:08 PM EDT	Special Weather Statement	BUF	Livingston	52 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.