Alert archive / New York / Flash Flood Warnings in 2015

Flash Flood Warning 22, NWS Buffalo, NY

July 18, 2015Ontario County, New York

NWS Buffalo, NY issued this flash flood warning at Jul 18, 2015, 7:00 AM 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
Jul 18, 2015, 7:00 AM EDT (11:00 UTC)
Expired
Jul 18, 2015, 10:00 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), 114 km from the middle of the area, began a volume at 11:04 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, 11.0 hours before the alert went out and 111 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 00:00Z on 2015-07-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 117 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 00:00Z on 2015-07-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 212 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
117 J/kg
Mixed-layer CIN
-44 J/kg
Mixed-layer LCL
1119 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
212 m²/s²
0-3 km storm-relative helicity
322 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

311 
WGUS51 KBUF 181100
FFWBUF
NYC069-181400-
/O.NEW.KBUF.FF.W.0022.150718T1100Z-150718T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
700 AM EDT SAT JUL 18 2015

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHERN ONTARIO COUNTY IN WESTERN NEW YORK...

* UNTIL 1000 AM EDT
    
* AT 658 AM EDT...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. UP TO TWO INCHES OF RAIN HAVE
  ALREADY FALLEN. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  NAPLES...RUSHVILLE...CANADICE...HUNT HOLLOW AND BRISTOL MOUNTAIN. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4267 7749 4267 7759 4269 7760 4276 7761
      4277 7697 4276 7698 4276 7731 4273 7734
      4267 7736 4267 7737 4258 7737 4258 7749

$$

TMA
2 follow-up statements
862 
WGUS71 KBUF 181151
FFSBUF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
751 AM EDT SAT JUL 18 2015

NYC069-181400-
/O.CON.KBUF.FF.W.0022.000000T0000Z-150718T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ONTARIO NY-
751 AM EDT SAT JUL 18 2015

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1000 AM EDT FOR
SOUTHERN ONTARIO COUNTY...

AT 745 AM EDT...ALTHOUGH THE HEAVY RAINS HAVE ENDED...RUNOFF FROM 
OVER 2 INCHES OF RAINFALL EARLIER THIS MORNING IS CAUSING RAPID 
RISES. LOCAL LAW ENFORCEMENT HAVE REPORTED SEVERAL ROADS WITH WATER 
FLOWING OVER THEM INCLUDING ROUTE 245...ROUTE 12...AND ROUTE 36 IN 
AND AROUND NAPLES.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
NAPLES...RUSHVILLE...CANADICE...HUNT HOLLOW AND BRISTOL MOUNTAIN. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE. DO NOT 
DRIVE THROUGH FLOODED ROADS. HEED ANY ROAD CLOSURES.

&&

LAT...LON 4267 7749 4267 7759 4269 7760 4276 7761
      4277 7697 4276 7698 4276 7731 4273 7734
      4267 7736 4267 7737 4258 7737 4258 7749

$$

TMA
950 
WGUS71 KBUF 181354
FFSBUF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
954 AM EDT SAT JUL 18 2015

NYC069-181404-
/O.EXP.KBUF.FF.W.0022.000000T0000Z-150718T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ONTARIO NY-
954 AM EDT SAT JUL 18 2015

...THE FLASH FLOOD WARNING FOR SOUTHERN ONTARIO COUNTY WILL EXPIRE AT
1000 AM EDT...

FLOOD WATERS HAVE RECEDED...AND ARE NO LONGER EXPECTED TO POSE A
THREAT TO LIFE OR PROPERTY. PLEASE CONTINUE TO HEED ANY ROAD
CLOSURES.

LAT...LON 4267 7749 4267 7759 4269 7760 4276 7761
      4277 7697 4276 7698 4276 7731 4273 7734
      4267 7736 4267 7737 4258 7737 4258 7749

$$

CHURCH

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 18, 3:37 AM EDTSpecial Weather StatementBUFGenesee, Monroe38 min
Jul 18, 4:16 AM EDTFlash Flood WarningBUFGenesee, Monroe, Orleans, Wayne3 hr
Jul 18, 5:03 AM EDTSpecial Weather StatementBUFOntario42 min
Jul 18, 5:35 AM EDTFlash Flood WarningBUFLivingston, Monroe, Ontario3 hr
Jul 18, 6:25 AM EDTSpecial Weather StatementBUFLivingston35 min
Jul 18, 3:43 PM EDTFlash Flood WatchBUFAllegany, Cattaraugus, Cayuga, Chautauqua, Erie, Genesee and 8 more29 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.