Alert archive / New York / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 80, NWS Buffalo, NY

August 10, 2009Monroe County, Wayne County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Aug 10, 2009, 6:21 PM EDT for Monroe County, Wayne County, New York. It was in force for 54 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: Aug 10, 2009, 6:21 PM EDT (22:21 UTC)
Expired: Aug 10, 2009, 7:15 PM EDT
In force: 54 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon

Counties Monroe County, NY, Wayne County, NY

The radar

The Buffalo radar (KBUF), 106 km from the middle of the area, began a volume at 22:22 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Aug 10, 3:13 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 10.4 hours before the alert went out and 104 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: 326 J/kg
Mixed-layer CIN: -97 J/kg
Mixed-layer LCL: 980 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 74 m²/s²
0-3 km storm-relative helicity: 65 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.2

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KBUF 102221
SVRBUF
NYC055-117-102315-
/O.NEW.KBUF.SV.W.0080.090810T2221Z-090810T2315Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
621 PM EDT MON AUG 10 2009

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EAST CENTRAL MONROE COUNTY IN WESTERN NEW YORK
  WESTERN WAYNE COUNTY IN WESTERN NEW YORK

* UNTIL 715 PM EDT

* AT 618 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  ROCHESTER...AND MOVING EAST AT 25 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  PENFIELD BY 630 PM EDT...
  FAIRPORT BY 635 PM EDT...
  WEBSTER BY 640 PM EDT...
  ONTARIO BY 655 PM EDT...
  WILLIAMSON BY 705 PM EDT...
  MARION BY 710 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

&&

LAT...LON 4311 7764 4325 7763 4325 7759 4325 7754
      4326 7751 4329 7711 4306 7712
TIME...MOT...LOC 2221Z 272DEG 23KT 4316 7757

$$

HITCHCOCK

2 follow-up statements

000 
WWUS51 KBUF 102258
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
658 PM EDT MON AUG 10 2009

NYC055-117-102315-
/O.CON.KBUF.SV.W.0080.000000T0000Z-090810T2315Z/
WAYNE NY-MONROE NY-
658 PM EDT MON AUG 10 2009

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT
FOR EAST CENTRAL MONROE AND WESTERN WAYNE COUNTIES...

AT 657 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED 7 MILES NORTHWEST OF IRONDEQUOIT...OR NEAR GREECE...MOVING
EAST AT 30 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  IRONDEQUOIT BAY BY 710 PM EDT...
  WEBSTER BY 715 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE INDOORS AWAY FROM WINDOWS AS THIS STORM MOVES THROUGH THE 
REGION.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM EDT
MONDAY EVENING FOR WESTERN NEW YORK.

&&

LAT...LON 4311 7764 4325 7763 4325 7759 4325 7754
      4326 7751 4329 7711 4306 7712
TIME...MOT...LOC 2258Z 283DEG 28KT 4326 7768

$$

HITCHCOCK

000 
WWUS51 KBUF 102316
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
716 PM EDT MON AUG 10 2009

NYC055-117-102326-
/O.EXP.KBUF.SV.W.0080.000000T0000Z-090810T2315Z/
WAYNE NY-MONROE NY-
716 PM EDT MON AUG 10 2009

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL MONROE AND
WESTERN WAYNE COUNTIES HAS EXPIRED...

AT 716 PM EDT NATIONAL WEATHER SERVICE RADAR SHOWED THAT THE SEVERE
THUNDERSTORM THAT PROMPTED THE WARNING HAD WEAKENED AND WAS NO LONGER
SEVERE...THUS THE WARNING HAS BEEN ALLOWED TO EXPIRE.

PLEASE REPORT SEVERE WEATHER TO LOCAL LAW ENFORCEMENT FOR RELAY TO 
THE NATIONAL WEATHER SERVICE IN BUFFALO.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM EDT
MONDAY EVENING FOR WESTERN NEW YORK.

LAT...LON 4311 7764 4325 7763 4325 7759 4325 7754
      4326 7751 4329 7711 4306 7712
TIME...MOT...LOC 2258Z 283DEG 28KT 4326 7768

$$

HITCHCOCK

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 9, 8:04 PM EDT	Flash Flood Warning	BUF	Wayne	3 hr
Aug 9, 8:41 PM EDT	Special Marine Warning	BUF		94 min
Aug 9, 8:58 PM EDT	Severe Thunderstorm Warning	BUF	Genesee, Monroe, Niagara, Orleans	92 min
Aug 9, 9:17 PM EDT	Flash Flood Warning	BUF	Cayuga, Wayne	3 hr
Aug 9, 9:28 PM EDT	Severe Thunderstorm Warning	BUF	Erie, Genesee, Niagara, Orleans, Wyoming	77 min
Aug 9, 9:44 PM EDT	Special Marine Warning	BUF		91 min
Aug 9, 10:08 PM EDT	Severe Thunderstorm Warning	BUF	Genesee, Livingston, Monroe, Ontario, Wyoming	67 min
Aug 9, 10:19 PM EDT	Severe Thunderstorm Warning	BUF	Allegany, Cattaraugus, Chautauqua, Erie, Livingston, Wyoming	71 min
Aug 9, 10:28 PM EDT	Severe Thunderstorm Warning	BUF	Monroe, Ontario, Wayne	65 min
Aug 9, 10:50 PM EDT	Severe Thunderstorm Warning	BUF	Allegany, Cattaraugus, Chautauqua, Erie, Livingston, Ontario and 1 more	70 min
Aug 9, 10:59 PM EDT	Flash Flood Warning	BUF	Wayne	64 min
Aug 9, 11:18 PM EDT	Special Marine Warning	BUF		57 min
Aug 9, 11:26 PM EDT	Flash Flood Warning	BUF	Allegany, Cattaraugus, Chautauqua, Erie	3 hr
Aug 10, 12:01 AM EDT	Severe Thunderstorm Warning	BUF	Allegany, Cattaraugus, Chautauqua	59 min
Aug 10, 12:56 AM EDT	River Flood Warning	BUF	Cattaraugus, Chautauqua, Erie, Wyoming	13 hr
Aug 10, 3:18 AM EDT	River Flood Warning	BUF	Erie	10 hr
Aug 10, 4:25 AM EDT	Flash Flood Watch	BUF	Allegany, Cattaraugus, Cayuga, Chautauqua, Erie, Genesee and 7 more	17 hr
Aug 10, 4:40 AM EDT	Small Craft Advisory	BUF		10 hr
Aug 10, 5:15 AM EDT	Flash Flood Warning	BUF	Genesee, Niagara, Orleans	109 min
Aug 10, 6:02 AM EDT	Flash Flood Warning	BUF	Genesee, Livingston, Monroe, Ontario, Orleans, Wayne	109 min
Aug 10, 6:38 AM EDT	Special Marine Warning	BUF		52 min
Aug 10, 6:43 AM EDT	Flash Flood Warning	BUF	Chautauqua	3 hr
Aug 10, 9:33 AM EDT	River Flood Warning	BUF	Erie, Wyoming	4 hr
Aug 10, 2:40 PM EDT	Severe Thunderstorm Warning	BUF	Ontario, Wayne	55 min
Aug 10, 2:52 PM EDT	Flash Flood Warning	BUF	Chautauqua	76 min
Aug 10, 3:17 PM EDT	Severe Thunderstorm Warning	BUF	Wayne	58 min
Aug 10, 3:46 PM EDT	Areal Flood Advisory	BUF	Wayne	6 hr
Aug 10, 4:13 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga	20 min
Aug 10, 4:50 PM EDT	Severe Thunderstorm Warning	BUF	Niagara	30 min
Aug 10, 5:08 PM EDT	Flash Flood Warning	BUF	Niagara	45 min
Aug 10, 5:12 PM EDT	Special Marine Warning	BUF		40 min
Aug 10, 5:45 PM EDT	Special Marine Warning	BUF		99 min
Aug 10, 6:50 PM EDT	Severe Thunderstorm Warning	BUF	Wayne	55 min
Aug 10, 7:00 PM EDT	Special Marine Warning	BUF		43 min
Aug 10, 7:08 PM EDT	Flash Flood Warning	BUF	Wayne	3 hr
Aug 10, 7:41 PM EDT	Flash Flood Warning	BUF	Cayuga	3 hr

Nearby

Severe Thunderstorm Warnings in New York, 2009 Every severe thunderstorm warning in 2009

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.