Flash Flood Warning 28, NWS Buffalo, NY

Issued

Aug 12, 2009, 4:34 PM EDT (20:34 UTC)

Expired

Aug 12, 2009, 7:20 PM EDT

In force

3 hr

Issued by

NWS Buffalo, NY

Area

Storm-based polygon

Flood severity

None

County Cattaraugus County, NY

The Buffalo radar (KBUF), 74 km from the middle of the area, began a volume at 20:36 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.

000 
WGUS51 KBUF 122034
FFWBUF
NYC009-122330-
/O.NEW.KBUF.FF.W.0028.090812T2034Z-090812T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
434 PM EDT WED AUG 12 2009

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL CATTARAUGUS COUNTY IN WESTERN NEW YORK...

* UNTIL 730 PM EDT

* AT 429 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN FROM A NEARLY STATIONARY THUNDERSTORM BETWEEN 
  ELLICOTTVILLE AND FRANKLINVILLE...INCLUDING THE TOWN OF ASHLAND.
  NATIONAL WEATHER SERVICE DOPPLER RADAR HAS INDICATED THAT OVER 2
  INCHES OF RAIN HAS FALLEN ACROSS THIS AREA BETWEEN 3:30 AND 4:30
  PM.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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.

IN HILLY TERRAIN THERE ARE HUNDREDS OF LOW WATER CROSSINGS WHICH ARE
POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO TRAVEL ACROSS
FLOODED ROADS. FIND ALTERNATE ROUTES. IT ONLY TAKES A FEW INCHES OF
SWIFTLY FLOWING WATER TO CARRY VEHICLES AWAY.

&&

LAT...LON 4236 7863 4236 7844 4220 7844 4220 7865

$$

RSH

000 
WGUS71 KBUF 122221
FFSBUF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
621 PM EDT WED AUG 12 2009

NYC009-122330-
/O.CON.KBUF.FF.W.0028.000000T0000Z-090812T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CATTARAUGUS NY-
621 PM EDT WED AUG 12 2009

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 730 PM EDT FOR
CENTRAL CATTARAUGUS COUNTY...

AT 619 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THAT THE THUNDERSTORMS WHICH PRODUCED THE FLASH FLOODING OVER THE 
REGION HAVE DISSIPATED. HOWEVER...FLASH FLOODING IS STILL POSSIBLE 
FOR AWHILE LONGER UNTIL THE RUNOFF FROM THE STORMS HAS EASED. THE 
WARNING THEREFORE REMAINS IN EFFECT UNTIL 730 PM. 

LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...ASHFORD 
AND FRANKLINVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT UNDERESTIMATE THE POWER OF FLOOD WATERS. ONLY A FEW INCHES OF
RAPIDLY FLOWING WATER CAN QUICKLY CARRY AWAY YOUR VEHICLE.

&&

LAT...LON 4236 7863 4236 7844 4220 7844 4220 7865

$$

JJR

000 
WGUS71 KBUF 122320
FFSBUF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
720 PM EDT WED AUG 12 2009

NYC009-122335-
/O.CAN.KBUF.FF.W.0028.000000T0000Z-090812T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CATTARAUGUS NY-
720 PM EDT WED AUG 12 2009

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR CENTRAL CATTARAUGUS
COUNTY...

WHILE THE THUNDERSTORMS THAT PROMPTED THE WARNING HAVE LONG SINCE 
DISSIPATED...PONDING OF LOW LYING AND POOR DRAINAGE AREAS WILL BE 
POSSIBLE FOR AWHILE LONGER THIS EVENING UNTIL THE WATER HAS TIME TO 
RUN OFF.

LAT...LON 4236 7863 4236 7844 4220 7844 4220 7865

$$

JJR

Flash Flood Warnings in New York, 2009Every flash flood warning in 2009

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.