Alert archive / New York / Flash Flood Warnings in 2014

Flash Flood Warning 11, NWS Buffalo, NY

July 27, 2014Erie County, Genesee County, Wyoming County, New York

NWS Buffalo, NY issued this flash flood warning at Jul 27, 2014, 11:55 PM EDT for Erie County, Genesee County, Wyoming 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: Jul 27, 2014, 11:55 PM EDT (03:55 UTC)
Expired: Jul 28, 2014, 2:45 AM EDT
In force: 3 hr
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Flood severity: None

Counties Erie County, NY, Genesee County, NY, Wyoming County, NY

The radar

The Buffalo radar (KBUF), 33 km from the middle of the area, began a volume at 03:56 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 00:00Z, 3.9 hours before the alert went out and 30 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: 628 J/kg
Mixed-layer CIN: -79 J/kg
Mixed-layer LCL: 1463 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 53 m²/s²
0-3 km storm-relative helicity: 55 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.

825 
WGUS51 KBUF 280355
FFWBUF
NYC029-037-121-280645-
/O.NEW.KBUF.FF.W.0011.140728T0355Z-140728T0645Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
1155 PM EDT SUN JUL 27 2014

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EAST CENTRAL ERIE COUNTY IN WESTERN NEW YORK...
  THIS INCLUDES THE TOWN OF MARILLA...
  EXTREME SOUTHWESTERN GENESEE COUNTY IN WESTERN NEW YORK...
  NORTHWESTERN WYOMING COUNTY IN WESTERN NEW YORK...

* UNTIL 245 AM EDT

* AT 1144 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  FLASH FLOODING FROM A THUNDERSTORM OVER THE WARNED AREA. RADAR
  ESTIMATES THAT BETWEEN ONE AND TWO INCHES OF RAIN HAS FALLEN OVER 
  THE WARNED AREA. TRAINING THUNDERSTORMS SLOWLY MOVING NORTHWARD 
  OVER THE WARNED AREA WILL CONTINUE TO PRODUCE HEAVY RAINFALL. 
  ADDITIONAL RAINFALL AMOUNTS BETWEEN HALF AND ONE INCH ARE POSSIBLE 
  THROUGH THE OVERNIGHT.      

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.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

&&

LAT...LON 4263 7856 4289 7857 4289 7845 4289 7818
      4264 7818

$$

THOMAS

1 follow-up statement

141 
WGUS71 KBUF 280547
FFSBUF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
147 AM EDT MON JUL 28 2014

NYC029-037-121-280556-
/O.CAN.KBUF.FF.W.0011.000000T0000Z-140728T0645Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
GENESEE NY-WYOMING NY-ERIE NY-
147 AM EDT MON JUL 28 2014

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR EAST CENTRAL
ERIE...NORTHWESTERN WYOMING AND EXTREME SOUTHWESTERN GENESEE
COUNTIES...

AT 146 AM EDT NATIONAL WEATHER SERVICE RADAR SHOWED THAT THE
THUNDERSTORM THAT PROMPTED THE WARNING HAD EXITED THE AREA...THUS THE
FLOOD WARNING HAS BEEN CANCELLED.

LAT...LON 4263 7856 4289 7857 4289 7845 4289 7818
      4264 7818

$$

THOMAS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 27, 8:33 PM EDT	Special Marine Warning	BUF		42 min
Jul 27, 11:08 PM EDT	Special Weather Statement	BUF	Genesee, Niagara, Orleans	82 min
Jul 27, 11:26 PM EDT	Flash Flood Warning	BUF	Erie, Genesee, Niagara, Orleans	4 hr
Jul 28, 12:27 AM EDT	Flash Flood Warning	BUF	Livingston, Ontario	4 hr
Jul 28, 12:52 AM EDT	Flash Flood Warning	BUF	Livingston, Monroe, Ontario, Wayne	4 hr
Jul 28, 7:22 AM EDT	Special Weather Statement	BUF	Erie, Genesee, Livingston, Monroe, Niagara, Orleans and 1 more	83 min
Jul 28, 8:45 AM EDT	Flash Flood Warning	BUF	Livingston, Monroe, Ontario	6 hr
Jul 28, 9:16 AM EDT	Special Weather Statement	BUF	Chautauqua, Erie, Wyoming	74 min
Jul 28, 9:53 AM EDT	Flash Flood Warning	BUF	Monroe, Ontario	6 hr
Jul 28, 10:28 AM EDT	Special Weather Statement	BUF	Wyoming	77 min
Jul 28, 11:13 AM EDT	Special Weather Statement	BUF	Monroe	47 min
Jul 28, 12:52 PM EDT	Areal Flood Advisory	BUF	Monroe	3 hr

Nearby

Flash Flood Warnings in New York, 2014 Every flash flood warning in 2014

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.