Alert archive / New York / Flash Flood Warnings in 2015

Flash Flood Warning 26, NWS Buffalo, NY

August 11, 20154 counties in New York

NWS Buffalo, NY issued this flash flood warning at Aug 11, 2015, 7:53 PM EDT for 4 counties in New York. It was in force for 3 hr. 3 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 11, 2015, 7:53 PM EDT (23:53 UTC)
Expired
Aug 11, 2015, 11:00 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, Erie County, NY, Wyoming County, NY

The radar

The Buffalo radar (KBUF), 41 km from the middle of the area, began a volume at 23:52 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 11, 8:09 PM EDTFLASH FLOODBoston, NYNUMEROUS HOMES FLOODED ALONG BOSTON STATE RD DUE TO 18 MILE CREEK.
Aug 11, 8:09 PM EDTFLASH FLOODColden, NYRT 240 FLOODED NEAR THE POST OFFICE IN COLDEN.
Aug 11, 8:25 PM EDTFLASH FLOODGlenwood, NYSTATE RT240-VAUGHN RD FLOODED TO THE POST OFFICE IN GLENWOOD

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, 11.9 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-pSkew-T log-p diagram, Buffalo Intl Airport, NY at 12:00Z on 2015-08-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-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 2015-08-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 2 square meters per square second.193958Sfc1 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
1 J/kg
Mixed-layer CIN
-52 J/kg
Mixed-layer LCL
675 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
2 m²/s²
0-3 km storm-relative helicity
18 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.

668 
WGUS51 KBUF 112353
FFWBUF
NYC003-009-029-121-120300-
/O.NEW.KBUF.FF.W.0026.150811T2353Z-150812T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
753 PM EDT TUE AUG 11 2015

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHEASTERN ERIE COUNTY IN WESTERN NEW YORK...
  NORTHEASTERN CATTARAUGUS COUNTY IN WESTERN NEW YORK...
  NORTHWESTERN ALLEGANY COUNTY IN WESTERN NEW YORK...
  SOUTHWESTERN WYOMING COUNTY IN WESTERN NEW YORK...

* UNTIL 1100 PM EDT

* AT 753 PM EDT...LOCAL LAW ENFORCEMENT REPORTED FLASH FLOODING
  ACROSS THE WARNED AREA. FLASH FLOODING IS ALREADY OCCURRING.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  BOSTON...COLDEN...ARCADE...CHAFFEE...EAST CONCORD...NORTH BOSTON...
  YORKSHIRE AND HOLLAND.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 4264 7882 4275 7877 4258 7821 4238 7837

$$

WOOD
2 follow-up statements
402 
WGUS71 KBUF 120131
FFSBUF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
931 PM EDT TUE AUG 11 2015

NYC003-009-121-120137-
/O.CAN.KBUF.FF.W.0026.000000T0000Z-150812T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CATTARAUGUS NY-ALLEGANY NY-WYOMING NY-
931 PM EDT TUE AUG 11 2015

...THE FLASH FLOOD WARNING FOR NORTHEASTERN CATTARAUGUS...
NORTHWESTERN ALLEGANY AND SOUTHWESTERN WYOMING COUNTIES IS
CANCELLED...

THE HEAVY RAIN HAS ENDED...AND FLOODING IS NO LONGER EXPECTED TO POSE
A THREAT. PLEASE CONTINUE TO HEED ALL ROAD CLOSURES.

LAT...LON 4264 7882 4275 7877 4263 7849 4252 7862

$$

NYC029-120300-
/O.CON.KBUF.FF.W.0026.000000T0000Z-150812T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ERIE NY-
931 PM EDT TUE AUG 11 2015

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1100 PM EDT FOR
SOUTHEASTERN ERIE COUNTY...

AT 927 PM EDT...LOCAL LAW ENFORCEMENT REPORTED FLASH FLOODING ACROSS 
PORTIONS OF SOUTHEASTERN ERIE COUNTY INCLUDING THE TOWNS OF BOSTON 
AND COLDEN. AS MUCH AS TWO TO THREE INCHES OF RAIN HAVE FALLEN. 
WHILE RAIN HAS ENDED ACROSS THE AFFECTED AREA...FLASH FLOODING IS 
ONGOING AT THIS TIME.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
BOSTON...COLDEN...EAST CONCORD...NORTH BOSTON...HOLLAND AND WEST
FALLS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 4264 7882 4275 7877 4263 7849 4252 7862

$$

WOOD
886 
WGUS71 KBUF 120251
FFSBUF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
1051 PM EDT TUE AUG 11 2015

NYC029-120257-
/O.CAN.KBUF.FF.W.0026.000000T0000Z-150812T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ERIE NY-
1051 PM EDT TUE AUG 11 2015

...THE FLASH FLOOD WARNING FOR SOUTHEASTERN ERIE COUNTY IS
CANCELLED...

AREA LAW ENFORCEMENT INDICATES THAT FLOOD WATERS HAVE MOSTLY 
RECEDED...AND ARE NO LONGER EXPECTED TO POSE A THREAT TO LIFE OR 
PROPERTY. IF YOU WILL BE TRAVELING...PLEASE CONTINUE TO HEED ANY 
ROAD CLOSURES...AND REMAIN ON THE LOOKOUT FOR ANY LEFTOVER DEBRIS 
ON AREA ROADWAYS. 

LAT...LON 4264 7882 4275 7877 4263 7849 4252 7862

$$

JJR

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 10, 8:22 PM EDTAreal Flood WarningBUFMonroe, Ontario3 hr
Aug 10, 10:17 PM EDTSmall Craft AdvisoryBUF17 hr

Nearby

Flash Flood Warnings in New York, 2015Every flash flood warning in 2015

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.