Alert archive / New York / Flash Flood Warnings in 2011

Flash Flood Warning 17, NWS Buffalo, NY

August 14, 2011Livingston County, Ontario County, New York

NWS Buffalo, NY issued this flash flood warning at Aug 14, 2011, 1:54 PM EDT for Livingston County, Ontario County, New York. It was in force for 3 hr. 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 14, 2011, 1:54 PM EDT (17:54 UTC)
Expired: Aug 14, 2011, 5:00 PM EDT
In force: 3 hr
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Flood severity: None

Counties Livingston County, NY, Ontario County, NY

The radar

The Buffalo radar (KBUF), 114 km from the middle of the area, began a volume at 17:55 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, 5.9 hours before the alert went out and 111 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: 7058 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 60 m²/s²
0-3 km storm-relative helicity: 104 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.

196 
WGUS51 KBUF 141754
FFWBUF
NYC051-069-142100-
/O.NEW.KBUF.FF.W.0017.110814T1754Z-110814T2100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
154 PM EDT SUN AUG 14 2011

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EAST CENTRAL LIVINGSTON COUNTY IN WESTERN NEW YORK...
  ONTARIO COUNTY IN WESTERN NEW YORK...
  THIS INCLUDES THE CITY OF CANANDAIGUA...

* UNTIL 500 PM EDT

* AT 151 PM EDT...RADAR INDICATED HEAVY RAIN AND THUNDERSTORMS       
  MOVING NORTH INTO THE REGION. RAINFALL OF OVER 2 INCHES CAN BE     
  EXPECTED IN SOME AREAS IN LESS THAN 2 HOURS. THESE ARE OVER THE    
  SAME AREAS WHICH RECEIVED UP TO 3 INCHES OF RAIN IN STORMS         
  SATURDAY EVENING. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE SUBJECT TO FLOODING.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.

&&

LAT...LON 4292 7765 4299 7701 4276 7703 4276 7731
      4272 7734 4267 7735 4266 7736 4258 7735
      4257 7737 4257 7762

$$

SFM

2 follow-up statements

363 
WGUS71 KBUF 141933
FFSBUF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
333 PM EDT SUN AUG 14 2011

NYC051-069-142100-
/O.CON.KBUF.FF.W.0017.000000T0000Z-110814T2100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LIVINGSTON NY-ONTARIO NY-
333 PM EDT SUN AUG 14 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 500 PM EDT FOR
ONTARIO AND EAST CENTRAL LIVINGSTON COUNTIES...

AT 327 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE SHOWERS AND THUNDERSTORMS LIFTING NORTHWEST ACROSS THE 
REGION. ONE TO TWO INCHES OF RAIN HAS FALLEN SINCE 1 PM...AND UP TO 
AN ADDITIONAL INCH IS POSSIBLE. THIS HAS FALLEN OVER THE SAME AREAS 
WHICH RECEIVED HEAVY RAINS SATURDAY EVENING. 

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO HONEOYE...
HEMLOCK...BRISTOL...PHELPS...LIMA...CLIFTON SPRINGS AND CANANDAIGUA

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE SUBJECT TO FLOODING.

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

&&

LAT...LON 4292 7765 4299 7701 4276 7703 4276 7731
      4272 7734 4267 7735 4266 7736 4258 7735
      4257 7737 4257 7762

$$
SFM

723 
WGUS71 KBUF 142105
FFSBUF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
505 PM EDT SUN AUG 14 2011

NYC051-069-142115-
/O.EXP.KBUF.FF.W.0017.000000T0000Z-110814T2100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LIVINGSTON NY-ONTARIO NY-
505 PM EDT SUN AUG 14 2011

...THE FLASH FLOOD WARNING HAS EXPIRED FOR ONTARIO AND EAST CENTRAL
LIVINGSTON COUNTIES...

AT 505 PM EDT NATIONAL WEATHER SERVICE RADAR SHOWED THAT THE
THUNDERSTORM THAT PROMPTED THE WARNING HAD EXITED THE AREA...THUS THE
FLOOD WARNING HAS BEEN ALLOWED TO EXPIRE.

A SEPERATE FLOOD WARNING DOES REMAIN IN EFFECT FOR FAR NORTHERN 
SECTIONS OF LIVINGSTON AND ONTARIO COUNTIES.

LAT...LON 4292 7765 4299 7701 4276 7703 4276 7731
      4272 7734 4267 7735 4266 7736 4258 7735
      4257 7737 4257 7762

$$

HITCHCOCK

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 13, 8:10 PM EDT	Severe Thunderstorm Warning	BUF	Wayne	65 min
Aug 13, 8:35 PM EDT	Severe Thunderstorm Warning	BUF	Ontario, Wayne	55 min
Aug 13, 9:16 PM EDT	Special Weather Statement	BUF	Ontario	59 min
Aug 13, 9:56 PM EDT	Flash Flood Warning	BUF	Ontario	3 hr
Aug 13, 11:06 PM EDT	Areal Flood Advisory	BUF	Livingston	118 min
Aug 13, 11:43 PM EDT	Flash Flood Warning	BUF	Livingston	75 min
Aug 14, 9:00 AM EDT	Special Weather Statement	BUF	Erie	60 min
Aug 14, 9:28 AM EDT	Special Weather Statement	BUF	Erie	47 min
Aug 14, 10:12 AM EDT	Areal Flood Advisory	BUF	Allegany, Cattaraugus, Erie, Wyoming	3 hr
Aug 14, 10:12 AM EDT	Special Weather Statement	BUF	Erie, Wyoming	48 min
Aug 14, 10:59 AM EDT	Flash Flood Warning	BUF	Allegany, Cattaraugus, Livingston, Wyoming	3 hr
Aug 14, 11:10 AM EDT	Special Weather Statement	BUF	Erie	50 min
Aug 14, 2:33 PM EDT	Special Weather Statement	BUF	Monroe	57 min
Aug 14, 2:40 PM EDT	Flash Flood Warning	BUF	Livingston, Monroe, Ontario, Wayne	5 hr
Aug 14, 5:53 PM EDT	Areal Flood Advisory	BUF	Jefferson, Lewis, Oswego	3 hr

Nearby

Flash Flood Warnings in New York, 2011 Every flash flood warning 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.