Alert archive / New York / Flash Flood Warnings in 2013

Flash Flood Warning 6, NWS Buffalo, NY

July 19, 2013Erie County, Niagara County, New York

NWS Buffalo, NY issued this flash flood warning at Jul 19, 2013, 8:51 PM EDT for Erie County, Niagara County, New York. It was in force for 3 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 19, 2013, 8:51 PM EDT (00:51 UTC)
Expired: Jul 19, 2013, 11:45 PM EDT
In force: 3 hr
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Flood severity: None

Counties Erie County, NY, Niagara County, NY

The radar

The Buffalo radar (KBUF), 20 km from the middle of the area, began a volume at 00:51 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 19, 9:00 PM EDT	FLASH FLOOD	1 Ne Pendleton, NY	LOTS OF STREETS AND FIELDS FLOODED IN NE PENDLETON UP THROUGH SOUTHERN LOCKPORT.

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, 0.9 hours before the alert went out and 23 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: 1370 J/kg
Mixed-layer CIN: -36 J/kg
Mixed-layer LCL: 1402 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 124 m²/s²
0-3 km storm-relative helicity: 117 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.

976 
WGUS51 KBUF 200051
FFWBUF
NYC029-063-200345-
/O.NEW.KBUF.FF.W.0006.130720T0051Z-130720T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
851 PM EDT FRI JUL 19 2013

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHEASTERN ERIE COUNTY IN WESTERN NEW YORK...
  SOUTHERN NIAGARA COUNTY IN WESTERN NEW YORK...
  THIS INCLUDES THE CITIES OF...NORTH TONAWANDA...LOCKPORT...

* UNTIL 1145 PM EDT

* AT 845 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
  VERY HEAVY RAIN FROM THUNDERSTORMS OVER THE WARNED AREA. RAINFALL
  IN EXCESS OF 2 INCHES HAS FALLEN OVER THE WARNED AREA BETWEEN 8 
  AND 9 PM AND AN ADDITIONAL INCH OF RAIN WILL BE POSSIBLE BY 11 PM.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE SUBJECT TO FLOODING.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.

&&

LAT...LON 4317 7905 4319 7847 4308 7847 4303 7887

$$

RSH

2 follow-up statements

238 
WGUS71 KBUF 200138
FFSBUF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
938 PM EDT FRI JUL 19 2013

NYC029-063-200345-
/O.CON.KBUF.FF.W.0006.000000T0000Z-130720T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NIAGARA NY-ERIE NY-
938 PM EDT FRI JUL 19 2013

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1145 PM EDT FOR
NORTHEASTERN ERIE AND SOUTHERN NIAGARA COUNTIES...

AT 935 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE THUNDERSTORMS PRODUCING VERY HEAVY RAIN OVER SOUTHERN 
NIAGARA COUNTY.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO PENDLETON...
NORTH TONAWANDA AND AREAS JUST SOUTH OF LOCKPORT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

NATIONAL WEATHER SERVICE DOPPLER RADAR ESTIMATES THAT OVER 2 INCHES  
OF RAIN HAS FALLEN OVER THE WARNED AREA WITH ADDITIONAL 
THUNDERSTORMS FORECAST TO PRODUCE AT LEAST ANOTHER INCH OF RAIN BY 
MIDNIGHT.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE SUBJECT TO FLOODING.

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.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL MIDNIGHT EDT
SATURDAY MORNING FOR WESTERN NEW YORK.

&&

LAT...LON 4317 7905 4319 7847 4308 7847 4303 7887

$$

RSH

511 
WGUS71 KBUF 200343
FFSBUF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
1143 PM EDT FRI JUL 19 2013

NYC029-063-200352-
/O.EXP.KBUF.FF.W.0006.000000T0000Z-130720T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NIAGARA NY-ERIE NY-
1143 PM EDT FRI JUL 19 2013

...THE FLASH FLOOD WARNING WILL EXPIRE AT 1145 PM EDT FOR
NORTHEASTERN ERIE AND SOUTHERN NIAGARA COUNTIES...

PONDING OF LOW LYING AND POOR DRAINAGE AREAS WILL STILL BE POSSIBLE 
FOR AWHILE UNTIL THE WATER HAS TIME TO RUN OFF. ALSO...ADDITIONAL 
STORMS OVERNIGHT COULD PRODUCE AN ADDITIONAL HALF TO THREE QUARTERS 
OF AN INCH OF RAIN. THIS SHOULD ONLY AGGRAVATE THE ALREADY EXISTING 
PONDING. 

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL MIDNIGHT EDT
SATURDAY MORNING FOR WESTERN NEW YORK.

LAT...LON 4317 7905 4319 7847 4308 7847 4303 7887

$$

RSH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 19, 8:01 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Oswego, Wayne	59 min
Jul 19, 8:03 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis, Oswego	57 min
Jul 19, 8:20 PM EDT	Areal Flood Advisory	BUF	Erie, Genesee, Niagara, Orleans	3 hr
Jul 19, 8:32 PM EDT	Severe Thunderstorm Warning	BUF	Niagara	43 min
Jul 19, 8:49 PM EDT	Severe Thunderstorm Warning	BUF	Genesee, Wyoming	56 min
Jul 19, 8:58 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis	32 min
Jul 19, 9:25 PM EDT	Severe Thunderstorm Warning	BUF	Erie, Niagara	65 min
Jul 19, 9:49 PM EDT	Special Marine Warning	BUF		56 min
Jul 19, 9:56 PM EDT	Special Marine Warning	BUF		64 min
Jul 19, 10:06 PM EDT	Severe Thunderstorm Warning	BUF	Cattaraugus, Chautauqua, Erie	54 min
Jul 19, 10:21 PM EDT	Severe Thunderstorm Warning	BUF	Erie, Genesee, Niagara, Wyoming	54 min
Jul 19, 10:33 PM EDT	Areal Flood Advisory	BUF	Erie, Genesee, Wyoming	3 hr
Jul 19, 10:49 PM EDT	Severe Thunderstorm Warning	BUF	Genesee, Livingston, Wyoming	56 min
Jul 20, 12:46 AM EDT	Special Marine Warning	BUF		59 min
Jul 20, 1:18 AM EDT	Areal Flood Advisory	BUF	Erie, Genesee, Niagara, Orleans	3 hr
Jul 20, 1:21 AM EDT	Special Marine Warning	BUF		84 min
Jul 20, 2:43 AM EDT	Special Weather Statement	BUF	Ontario	32 min
Jul 20, 3:45 AM EDT	Special Marine Warning	BUF		60 min
Jul 20, 4:02 AM EDT	Severe Thunderstorm Warning	BUF	Erie	43 min
Jul 20, 4:49 AM EDT	Small Craft Advisory	BUF		9 hr

Nearby

Flash Flood Warnings in New York, 2013 Every flash flood warning in 2013

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.