Alert archive / New York / Flash Flood Warnings in 2011

Flash Flood Warning 14, NWS Buffalo, NY

August 13, 2011Ontario County, New York

NWS Buffalo, NY issued this flash flood warning at Aug 13, 2011, 9:56 PM EDT for 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 13, 2011, 9:56 PM EDT (01:56 UTC)
Expired: Aug 14, 2011, 12:46 AM EDT
In force: 3 hr
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Flood severity: None

County Ontario County, NY

The radar

The Buffalo radar (KBUF), 113 km from the middle of the area, began a volume at 01:57 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, 1.9 hours before the alert went out and 110 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: 43 J/kg
Mixed-layer CIN: -105 J/kg
Mixed-layer LCL: 1765 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 32 m²/s²
0-3 km storm-relative helicity: 52 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.

152 
WGUS51 KBUF 140156
FFWBUF
NYC069-140500-
/O.NEW.KBUF.FF.W.0014.110814T0156Z-110814T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
956 PM EDT SAT AUG 13 2011

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

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

* UNTIL 100 AM EDT

* AT 953 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  VERY SLOW MOVING THUNDERSTORMS WITH TORRENTIAL RAINFALL ACROSS     
  MUCH OF ONTARIO COUNTY. THESE STORMS HAVE PRODUCED 2 TO 3 INCHES   
  OF RAIN LOCALLY IN A SHORT PERIOD OF TIME. ADDITIONAL RAINFALL     
  AMOUNTS OF 1 TO 2 INCHES ARE POSSIBLE ACROSS NORTHERN PORTIONS OF  
  THE BRISTOL HILLS.

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 4267 7760 4273 7760 4282 7758 4301 7731
      4301 7703 4283 7701 4275 7721 4276 7731
      4270 7735 4267 7743

$$

HITCHCOCK

2 follow-up statements

666 
WGUS71 KBUF 140310
FFSBUF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
1110 PM EDT SAT AUG 13 2011

NYC069-140500-
/O.CON.KBUF.FF.W.0014.000000T0000Z-110814T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ONTARIO NY-
1110 PM EDT SAT AUG 13 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 100 AM EDT FOR
ONTARIO COUNTY...

AT 1106 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE AN AREA OF SHOWERS AND THUNDERSTORMS PRODUCING LOCALLY 
HEAVY RAINFALL OVER THE SOUTHERN HALF OF ONTARIO COUNTY. RADAR 
ESTIMATES THAT 3 TO 4 INCHES OF RAIN HAS FALLEN IN SOME AREAS OF 
CENTRAL ONTARIO COUNTY IN THE NORTHERN PORTION OF THE BRISTOL HILLS.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO 
BRISTOL...PHELPS...CLIFTON SPRINGS AND CANANDAIGUA. SOME SMALL 
STREAMS THAT WILL EXPERIENCE RAPID WATER RISES INCLUDE MILL CREEK... 
MUD CREEK...HONEOYE CREEK AND THEIR TRIBUTARIES. 

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. NEVER DRIVE INTO FLOOD 
WATERS. REMEMBER...TURN AROUND DONT DROWN!

&&

LAT...LON 4267 7760 4273 7760 4282 7758 4301 7731
      4301 7703 4283 7701 4275 7721 4276 7731
      4270 7735 4267 7743

$$

HITCHCOCK

466 
WGUS71 KBUF 140446
FFSBUF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
1246 AM EDT SUN AUG 14 2011

NYC069-140454-
/O.CAN.KBUF.FF.W.0014.000000T0000Z-110814T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ONTARIO NY-
1246 AM EDT SUN AUG 14 2011

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR ONTARIO COUNTY...

AT 1244 AM EDT NATIONAL WEATHER SERVICE RADAR SHOWED THAT THE 
THUNDERSTORMS THAT PROMPTED THE WARNING HAVE ENDED...AND THE FLOOD 
WATERS HAVE RECEDED. THEREFORE...THE FLOOD WARNING HAS BEEN 
CANCELLED.


LAT...LON 4267 7760 4273 7760 4282 7758 4301 7731
      4301 7703 4283 7701 4275 7721 4276 7731
      4270 7735 4267 7743

$$

TJP

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, 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, 1:54 PM EDT	Flash Flood Warning	BUF	Livingston, Ontario	3 hr
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.