Alert archive / New York / Flash Flood Warnings in 2011

Flash Flood Warning 16, NWS Buffalo, NY

August 14, 20114 counties in New York

NWS Buffalo, NY issued this flash flood warning at Aug 14, 2011, 10:59 AM EDT for 4 counties in New York. It was in force for 3 hr. 4 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Aug 14, 2011, 10:59 AM EDT (14:59 UTC)
Expired
Aug 14, 2011, 2:00 PM EDT
In force
3 hr
Issued by
NWS Buffalo, NY
Area
Storm-based polygon
Flood severity
None

Counties Allegany County, NY, Cattaraugus County, NY, Livingston County, NY, Wyoming County, NY

The radar

The Buffalo radar (KBUF), 78 km from the middle of the area, began a volume at 15:00 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.

What was reported inside it

TimeReportWhereRemark
Aug 14, 11:25 AM EDTFLOODCuba, NYSOUTH SHORE ROAD FLOODED.
Aug 14, 1:30 PM EDTFLOODCaneadea, NYRTE 19 CLOSED DUE TO FLOODING.
Aug 14, 1:30 PM EDTFLOODCuba, NYWEST SHORE RD CLOSED DUE TO FLOODING.
Aug 14, 1:45 PM EDTFLOODCuba, NYMULTIPLE FLOODING REPORTS OF HOMES AND STREETS.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 3.0 hours before the alert went out and 74 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-pSkew-T log-p diagram, Buffalo Intl Airport, NY at 12:00Z on 2011-08-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.1000850700500300200100-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Buffalo Intl Airport, NY at 12:00Z on 2011-08-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 60 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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.

729 
WGUS51 KBUF 141459
FFWBUF
NYC003-009-051-121-141800-
/O.NEW.KBUF.FF.W.0016.110814T1459Z-110814T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
1059 AM EDT SUN AUG 14 2011

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  ALLEGANY COUNTY IN WESTERN NEW YORK...
  SOUTHEASTERN CATTARAUGUS COUNTY IN WESTERN NEW YORK...
  THIS INCLUDES THE CITY OF OLEAN...
  SOUTHERN LIVINGSTON COUNTY IN WESTERN NEW YORK...
  SOUTHEASTERN WYOMING COUNTY IN WESTERN NEW YORK...

* UNTIL 200 PM EDT

* AT 1055 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED  
  EXCESSIVE RAINS OF OVER 2 INCHES PER HOUR FROM NEARLY STATIONARY   
  THUNDERSTORMS ACROSS THE AREA. FLASH FLOODING IS POSSIBLE. 

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.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.

&&

LAT...LON 4276 7804 4267 7765 4199 7811 4199 7864

$$

SFM
2 follow-up statements
148 
WGUS71 KBUF 141725
FFSBUF

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

NYC003-009-051-121-141800-
/O.CON.KBUF.FF.W.0016.000000T0000Z-110814T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ALLEGANY NY-CATTARAUGUS NY-LIVINGSTON NY-WYOMING NY-
125 PM EDT SUN AUG 14 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 200 PM EDT FOR
SOUTHEASTERN WYOMING...SOUTHERN LIVINGSTON...SOUTHEASTERN CATTARAUGUS
AND ALLEGANY COUNTIES...

AT 118 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED AN 
EASING IN THE VERY HEAVY RAIN THAT HAS BEEN FALLING ACROSS THE 
REGION SINCE MID MORNING. THERE HAVE BEEN RADAR ESTIMATES OF UP TO 4 
INCHES OVER WEST CENTRAL ALLEGANY COUNTY NEAR CUBA AND WELL OVER TWO 
INCHES ELSEWHERE IN THE WARNED AREA. 

LIGHTER RAINS WILL CONTINUE THROUGH MID AFTERNOON BUT RESIDUAL 
EFFECTS AND RUNOFF FROM THE HEAVY RAINS CAN STILL RESULT IN 
FLOODING. 


PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM THE HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

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 4276 7804 4267 7765 4199 7811 4199 7864

$$
SFM
076 
WGUS71 KBUF 141759
FFSBUF

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

NYC003-009-051-121-141808-
/O.EXP.KBUF.FF.W.0016.000000T0000Z-110814T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ALLEGANY NY-CATTARAUGUS NY-LIVINGSTON NY-WYOMING NY-
159 PM EDT SUN AUG 14 2011

...THE FLASH FLOOD WARNING WILL EXPIRE AT 200 PM EDT FOR SOUTHEASTERN
WYOMING...SOUTHERN LIVINGSTON...SOUTHEASTERN CATTARAUGUS AND ALLEGANY
COUNTIES...

AT 158 PM EDT NATIONAL WEATHER SERVICE RADAR SHOWED THAT THE HEAVY 
STORMS THAT PROMPTED THE WARNING HAVE WEAKENED. LIGHTER RAINS ARE 
STILL LIKELY FOR THE REST OF THE AFTERNOON.

PONDING OF LOW LYING AND POOR DRAINAGE AREAS WILL BE POSSIBLE FOR
AWHILE UNTIL THE WATER HAS TIME TO RUN OFF.

LAT...LON 4276 7804 4267 7765 4199 7811 4199 7864

$$
SFM

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 13, 8:10 PM EDTSevere Thunderstorm WarningBUFWayne65 min
Aug 13, 8:35 PM EDTSevere Thunderstorm WarningBUFOntario, Wayne55 min
Aug 13, 9:16 PM EDTSpecial Weather StatementBUFOntario59 min
Aug 13, 9:56 PM EDTFlash Flood WarningBUFOntario3 hr
Aug 13, 11:06 PM EDTAreal Flood AdvisoryBUFLivingston118 min
Aug 13, 11:43 PM EDTFlash Flood WarningBUFLivingston75 min
Aug 14, 9:00 AM EDTSpecial Weather StatementBUFErie60 min
Aug 14, 9:28 AM EDTSpecial Weather StatementBUFErie47 min
Aug 14, 10:12 AM EDTAreal Flood AdvisoryBUFAllegany, Cattaraugus, Erie, Wyoming3 hr
Aug 14, 10:12 AM EDTSpecial Weather StatementBUFErie, Wyoming48 min
Aug 14, 11:10 AM EDTSpecial Weather StatementBUFErie50 min
Aug 14, 1:54 PM EDTFlash Flood WarningBUFLivingston, Ontario3 hr
Aug 14, 2:33 PM EDTSpecial Weather StatementBUFMonroe57 min
Aug 14, 2:40 PM EDTFlash Flood WarningBUFLivingston, Monroe, Ontario, Wayne5 hr
Aug 14, 5:53 PM EDTAreal Flood AdvisoryBUFJefferson, Lewis, Oswego3 hr

Nearby

Flash Flood Warnings in New York, 2011Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.