Alert archive / New York / Special Weather Statements in 2011

Special Weather Statement, NWS Buffalo, NY

April 20, 2011Erie County, Wyoming County, New York

NWS Buffalo, NY issued this special weather statement at Apr 20, 2011, 12:23 AM EDT for Erie County, Wyoming County, New York. It was in force for 67 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: Apr 20, 2011, 12:23 AM EDT (04:23 UTC)
Expired: Apr 20, 2011, 1:30 AM EDT
In force: 67 min
Issued by: NWS Buffalo, NY

Counties Erie County, NY, Wyoming County, NY

The radar

The Buffalo radar (KBUF), 38 km from the middle of the area, began a volume at 04:23 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 00:00Z, 4.4 hours before the alert went out and 38 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 568 m above ground
0-6 km bulk shear: 78 kt
0-1 km storm-relative helicity: 306 m²/s²
0-3 km storm-relative helicity: 495 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

348 
WWUS81 KBUF 200423
SPSBUF

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
1223 AM EDT WED APR 20 2011

NYZ010>012-019-020-085-200530-
CATTARAUGUS NY-CHAUTAUQUA NY-ERIE NY-GENESEE NY-WYOMING NY-
1223 AM EDT WED APR 20 2011

...STRONG THUNDERSTORM MOVING INTO THE AREA...

* AT 1218 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  STRONG THUNDERSTORM CAPABLE OF PRODUCING SMALL HAIL.  THIS STORM
  WAS LOCATED 7 MILES NORTHWEST OF DUNKIRK...AND MOVING NORTHEAST AT
  50 MPH.

* SOME LOCATIONS AFFECTED BY THE STRONG THUNDERSTORM MAY INCLUDE...
  HAMBURG AND LACKAWANNA...
  WEST SENECA AND CHEEKTOWAGA...
  EAST AURORA AND LANCASTER...

THIS STORM HAS THE POTENTIAL TO BECOME SEVERE AND PRODUCE LARGE HAIL
AND/OR DAMAGING WINDS.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE
INDOORS IMMEDIATELY!

THIS STORM HAS THE POTENTIAL TO PRODUCE VERY HEAVY RAIN...AND COULD
CAUSE LOCALIZED FLOODING OF ROADS AND POOR DRAINAGE AREAS.

LAT...LON 4250 7936 4256 7916 4261 7913 4265 7907
      4269 7906 4271 7899 4278 7886 4285 7887
      4287 7890 4311 7831 4265 7805 4244 7943
      4246 7943

$$
TJP

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 20, 12:46 AM EDT	Special Weather Statement	BUF	Chautauqua, Erie	59 min
Apr 20, 1:26 AM EDT	Special Weather Statement	BUF	Cattaraugus, Chautauqua, Wyoming	64 min
Apr 20, 2:09 AM EDT	Special Weather Statement	BUF	Livingston, Ontario, Wyoming	51 min
Apr 20, 2:37 AM EDT	Special Weather Statement	BUF	Erie	53 min
Apr 20, 3:12 AM EDT	Areal Flood Advisory	BUF	Erie	3 hr
Apr 20, 3:29 AM EDT	Special Weather Statement	BUF	Allegany, Cattaraugus, Livingston, Wyoming	61 min
Apr 20, 4:17 AM EDT	Special Weather Statement	BUF	Allegany, Livingston, Ontario	58 min
Apr 20, 7:51 AM EDT	River Flood Warning	BUF	Erie, Wyoming	5 hr
Apr 20, 3:07 PM EDT	Wind Advisory	BUF	Chautauqua, Erie	5 hr

Nearby

Special Weather Statements in New York, 2011 Every special weather statement in 2011

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.