Alert archive / New York / Flash Flood Warnings in 2004

Flash Flood Warning 22, NWS Buffalo, NY

August 29, 2004Monroe County, New York

NWS Buffalo, NY issued this flash flood warning at Aug 29, 2004, 2:55 PM EDT for Monroe 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 29, 2004, 2:55 PM EDT (18:55 UTC)
Expired: Aug 29, 2004, 6:00 PM EDT
In force: 3 hr
Issued by: NWS Buffalo, NY
Area: Counties, with a storm outline in the text

County Monroe County, NY

The radar

The Buffalo radar (KBUF), 93 km from the middle of the area, began a volume at 18:56 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 12:00Z, 6.9 hours before the alert went out and 90 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: 1070 J/kg
Mixed-layer CIN: -40 J/kg
Mixed-layer LCL: 672 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 49 m²/s²
0-3 km storm-relative helicity: 76 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 1.4

Open this sounding in Storm Lab

The text

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

000 
WGUS51 KBUF 291855
FFWBUF
NYC055-292200-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
255 PM EDT SUN AUG 29 2004

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  MONROE COUNTY IN WESTERN NEW YORK

* UNTIL 600 PM EDT

* AT 255 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  HEAVY RAIN AND POSSIBLE FLASH FLOODING FROM THUNDERSTORMS OVER THE
  WARNED AREA.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  HENRIETTA...WEBSTER...ROCHESTER...IRONDEQUOIT...GATES...EAST
  ROCHESTER AND BRIGHTON.

THE RADAR SHOWED OVER 2 INCHES HAD FALLEN ACROSS THE SOUTHERN PART 
OF MONROE COUNTY...WITH MORE THUNDERSTORMS EXPECTED IN THE NEXT 
HOUR.  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.

LAT...LON 4324 7739 4307 7746 4304 7749 4297 7749
      4296 7773 4297 7771 4300 7773 4300 7781
      4313 7788

$$

APB

3 follow-up statements

000 
WGUS71 KBUF 291922
FFSBUF
NYC055-292200-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
320 PM EDT SUN AUG 29 2004

...A FLASH FLOOD WARNING CONTINUES UNTIL 600 PM EDT FOR MONROE
COUNTY...

AT 310 PM EDT...THE SHERIFF AND THE PUBLIC REPORTED FLOODING IN THE 
ROCHESTER AREA.  RADAR SHOWS HEAVY RAINS CONTINUING OVER THE 
SOUTHERN AND EASTERN PARTS OF MONROE COUNTY. 

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO HENRIETTA... 
WEBSTER...ROCHESTER...GATES...FAIRPORT... AND BRIGHTON.

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. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY.
MOVE TO HIGHER GROUND.

LAT...LON 4324 7739 4307 7746 4304 7749 4297 7749
      4296 7773 4297 7771 4300 7773 4300 7781
      4313 7788

$$

APB

000 
WGUS71 KBUF 292014
FFSBUF
NYC055-292200-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
415 PM EDT SUN AUG 29 2004

...A FLASH FLOOD WARNING CONTINUES UNTIL 600 PM EDT FOR MONROE
COUNTY...

AT 400 PM EDT...RADAR SHOWED THE RAIN SUBSIDING OVER THE AREA...SOME 
BRIEF HEAVY RAINS ARE STILL POSSIBLE BETWEEN HENRIETTA AND HONEYOYE 
FALLS...BUT GENERALLY THE FLOODING WILL BE SUBSIDING.  RADAR SHOWS 
THAT THE HEAVIEST RAINS FELL BETWEEN BRIGHTON AND SCOTTSVILLE.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO 
HENRIETTA...WEBSTER...ROCHESTER...SCOTTSVILLE AND BRIGHTON.

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.

MOST FLOOD RELATED DEATHS OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO 
CROSS WATER COVERED BRIDGES...DIPS...OR LOW WATER CROSSINGS. NEVER 
TRY TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT. 

LAT...LON 4324 7739 4307 7746 4304 7749 4297 7749
      4296 7773 4297 7771 4300 7773 4300 7781
      4313 7788

$$

APB

000 
WGUS71 KBUF 292115
FFSBUF
NYC055-292123-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
515 PM EDT SUN AUG 29 2004

...THE FLASH FLOOD WARNING FOR MONROE COUNTY IS CANCELLED...

AT 515 PM EDT NATIONAL WEATHER SERVICE RADAR SHOWED THAT THE 
THUNDERSTORMS THAT PROMPTED THE WARNING HAVE EXITED THE COUNTY.  
MORE SHOWERS ARE POSSIBLE THROUGH THE EVENING HOURS...BUT 
ADDITIONAL FLOODING IS NOT EXPECTED.

PONDING OF LOW LYING AND POOR DRAINAGE AREAS WILL BE POSSIBLE FOR
AWHILE UNTIL THE WATER HAS TIME TO RUN OFF.

LAT...LON 4324 7739 4307 7746 4304 7749 4297 7749
      4296 7773 4297 7771 4300 7773 4300 7781
      4313 7788

$$

APB

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 29, 2:03 PM EDT	Severe Thunderstorm Warning	BUF	Livingston	27 min
Aug 29, 2:07 PM EDT	Severe Thunderstorm Warning	BUF	Monroe	53 min
Aug 29, 3:10 PM EDT	Flash Flood Warning	BUF	Wayne	3 hr
Aug 29, 5:11 PM EDT	Severe Thunderstorm Warning	BUF	Cattaraugus	34 min
Aug 29, 5:56 PM EDT	Special Marine Warning	BUF		64 min
Aug 29, 6:06 PM EDT	Severe Thunderstorm Warning	BUF	Ontario	54 min

Nearby

Flash Flood Warnings in New York, 2004 Every flash flood warning in 2004

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.