Alert archive / New York / Flash Flood Warnings in 2014

Flash Flood Warning 12, NWS Buffalo, NY

July 28, 2014Livingston County, Ontario County, New York

NWS Buffalo, NY issued this flash flood warning at Jul 28, 2014, 12:27 AM EDT for Livingston County, Ontario County, New York. It was in force for 4 hr. 1 report 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: Jul 28, 2014, 12:27 AM EDT (04:27 UTC)
Expired: Jul 28, 2014, 4:30 AM EDT
In force: 4 hr
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Flood severity: None

Counties Livingston County, NY, Ontario County, NY

The radar

The Buffalo radar (KBUF), 101 km from the middle of the area, began a volume at 04:30 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

Time	Report	Where	Remark
Jul 28, 2:46 AM EDT	FLASH FLOOD	Wayland, NY	HOUSE FLOODED.

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 00:00Z, 4.5 hours before the alert went out and 97 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.

809 
WGUS51 KBUF 280427
FFWBUF
NYC051-069-280830-
/O.NEW.KBUF.FF.W.0012.140728T0427Z-140728T0830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
1227 AM EDT MON JUL 28 2014

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EASTERN LIVINGSTON COUNTY IN WESTERN NEW YORK...
  THIS INCLUDES THE CITIES OF...GENESEO...DANSVILLE...
  SOUTHWESTERN ONTARIO COUNTY IN WESTERN NEW YORK...
  THIS INCLUDES THE CITY OF CANANDAIGUA AND VILLAGE OF NAPLES...

* UNTIL 430 AM EDT

* AT 1219 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  FLASH FLOODING FROM THUNDERSTORMS OVER THE WARNED AREA. RADAR
  ESTIMATES THAT BETWEEN ONE AND TWO INCHES OF RAIN HAS FALLEN OVER 
  THE WARNED AREA. ADDITIONAL THUNDERSTORMS SLOWLY MOVING NORTHWARD 
  OVER THE WARNED AREA WILL CONTINUE TO PRODUCE HEAVY RAINFALL. 
  ADDITIONAL RAINFALL AMOUNTS BETWEEN HALF AND ONE AND A HALF INCHES 
  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 4248 7784 4252 7785 4292 7779 4290 7724
      4276 7725 4276 7731 4266 7736 4257 7737
      4257 7765 4253 7767 4253 7771 4247 7772

$$

THOMAS

2 follow-up statements

809 
WGUS71 KBUF 280559
FFSBUF

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

NYC051-069-280830-
/O.CON.KBUF.FF.W.0012.000000T0000Z-140728T0830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LIVINGSTON NY-ONTARIO NY-
159 AM EDT MON JUL 28 2014

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 430 AM EDT FOR
SOUTHWESTERN ONTARIO AND EASTERN LIVINGSTON COUNTIES...

AT 154 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE THUNDERSTORMS PRODUCING FLASH FLOODING OVER THE WARNED
AREA. AN ADDITIONAL QUARTER TO HALF INCH OF RAINFALL IS LIKELY 
THROUGH THE REMAINDER OF THE WARNING. 

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO GROVELAND...
HONEOYE...HEMLOCK...CONESUS...BRISTOL...LIMA...GENESEO...CANANDAIGUA
AND AVON

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 4248 7784 4252 7785 4292 7779 4290 7724
      4276 7725 4276 7731 4266 7736 4257 7737
      4257 7765 4253 7767 4253 7771 4247 7772

$$

THOMAS

385 
WGUS71 KBUF 280831
FFSBUF

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

NYC051-069-280841-
/O.EXP.KBUF.FF.W.0012.000000T0000Z-140728T0830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LIVINGSTON NY-ONTARIO NY-
431 AM EDT MON JUL 28 2014

...THE FLASH FLOOD WARNING HAS EXPIRED FOR SOUTHWESTERN ONTARIO AND
EASTERN LIVINGSTON COUNTIES...

THE FLOODING HAS RECEDED...THUS THE FLOOD WARNING HAS BEEN ALLOWED TO
EXPIRE.

LAT...LON 4248 7784 4252 7785 4292 7779 4290 7724
      4276 7725 4276 7731 4266 7736 4257 7737
      4257 7765 4253 7767 4253 7771 4247 7772

$$

HITCHCOCK

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 27, 11:55 PM EDT	Flash Flood Warning	BUF	Erie, Genesee, Wyoming	3 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.