Alert archive / New York / Flash Flood Warnings in 2009

Flash Flood Warning 14, NWS Buffalo, NY

August 9, 2009Cayuga County, Wayne County, New York

NWS Buffalo, NY issued this flash flood warning at Aug 9, 2009, 9:17 PM EDT for Cayuga County, Wayne 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 9, 2009, 9:17 PM EDT (01:17 UTC)
Expired: Aug 10, 2009, 12:15 AM EDT
In force: 3 hr
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Flood severity: None

Counties Cayuga County, NY, Wayne County, NY

The radar

The Ft Drum radar (KTYX), 103 km from the middle of the area, began a volume at 01:20 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, 1.3 hours before the alert went out and 174 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: 2759 J/kg
Mixed-layer CIN: -61 J/kg
Mixed-layer LCL: 833 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 103 m²/s²
0-3 km storm-relative helicity: 270 m²/s²
Significant tornado parameter: 2.7
Supercell composite: 16.6

Open this sounding in Storm Lab

The text

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

000 
WGUS51 KBUF 100117
FFWBUF
NYC011-117-100415-
/O.NEW.KBUF.FF.W.0014.090810T0117Z-090810T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
917 PM EDT SUN AUG 9 2009

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHWESTERN CAYUGA COUNTY IN CENTRAL NEW YORK...
  EASTERN WAYNE COUNTY IN WESTERN NEW YORK...

* UNTIL 1215 AM EDT

* AT 913 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAINFALL OVER THE PAST HOUR.

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.

&&

LAT...LON 4311 7649 4307 7648 4303 7648 4303 7667
      4302 7672 4302 7674 4330 7675 4321 7647
      4312 7647

$$
SAGE

2 follow-up statements

000 
WGUS71 KBUF 100215
FFSBUF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
1015 PM EDT SUN AUG 9 2009

NYC011-117-100415-
/O.CON.KBUF.FF.W.0014.000000T0000Z-090810T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WAYNE NY-CAYUGA NY-
1015 PM EDT SUN AUG 9 2009

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1215 AM EDT FOR
NORTHWESTERN CAYUGA AND EASTERN WAYNE COUNTIES...

AT 1013 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE THUNDERSTORMS PRODUCING VERY HEAVY RAIN OVER THE WARNED 
AREA.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO CATO

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.

FLOODING IS OCCURRING OR IS IMMINENT. 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. TO ESCAPE RISING WATER MOVE UP TO HIGHER
GROUND.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 300 AM EDT MONDAY
MORNING FOR WESTERN NEW YORK.

&&

LAT...LON 4311 7649 4307 7648 4303 7648 4303 7667
      4302 7672 4302 7674 4330 7675 4321 7647
      4312 7647

$$

SAGE

000 
WGUS71 KBUF 100409
FFSBUF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
1209 AM EDT MON AUG 10 2009

NYC011-117-100419-
/O.EXP.KBUF.FF.W.0014.000000T0000Z-090810T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WAYNE NY-CAYUGA NY-
1209 AM EDT MON AUG 10 2009

...THE FLASH FLOOD WARNING WILL EXPIRE AT 1215 AM EDT FOR
NORTHWESTERN CAYUGA AND EASTERN WAYNE COUNTIES...

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

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

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 300 AM EDT MONDAY
MORNING FOR WESTERN NEW YORK.

LAT...LON 4311 7649 4307 7648 4303 7648 4303 7667
      4302 7672 4302 7674 4330 7675 4321 7647
      4312 7647

$$

SAGE

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 9, 8:04 PM EDT	Flash Flood Warning	BUF	Wayne	3 hr
Aug 9, 8:41 PM EDT	Special Marine Warning	BUF		94 min
Aug 9, 8:58 PM EDT	Severe Thunderstorm Warning	BUF	Genesee, Monroe, Niagara, Orleans	92 min
Aug 9, 9:28 PM EDT	Severe Thunderstorm Warning	BUF	Erie, Genesee, Niagara, Orleans, Wyoming	77 min
Aug 9, 9:44 PM EDT	Special Marine Warning	BUF		91 min
Aug 9, 10:08 PM EDT	Severe Thunderstorm Warning	BUF	Genesee, Livingston, Monroe, Ontario, Wyoming	67 min
Aug 9, 10:19 PM EDT	Severe Thunderstorm Warning	BUF	Allegany, Cattaraugus, Chautauqua, Erie, Livingston, Wyoming	71 min
Aug 9, 10:28 PM EDT	Severe Thunderstorm Warning	BUF	Monroe, Ontario, Wayne	65 min
Aug 9, 10:50 PM EDT	Severe Thunderstorm Warning	BUF	Allegany, Cattaraugus, Chautauqua, Erie, Livingston, Ontario and 1 more	70 min
Aug 9, 10:59 PM EDT	Flash Flood Warning	BUF	Wayne	64 min
Aug 9, 11:18 PM EDT	Special Marine Warning	BUF		57 min
Aug 9, 11:26 PM EDT	Flash Flood Warning	BUF	Allegany, Cattaraugus, Chautauqua, Erie	3 hr
Aug 10, 12:01 AM EDT	Severe Thunderstorm Warning	BUF	Allegany, Cattaraugus, Chautauqua	59 min
Aug 10, 12:56 AM EDT	River Flood Warning	BUF	Cattaraugus, Chautauqua, Erie, Wyoming	13 hr
Aug 10, 3:18 AM EDT	River Flood Warning	BUF	Erie	10 hr
Aug 10, 4:25 AM EDT	Flash Flood Watch	BUF	Allegany, Cattaraugus, Cayuga, Chautauqua, Erie, Genesee and 7 more	17 hr
Aug 10, 4:40 AM EDT	Small Craft Advisory	BUF		10 hr
Aug 10, 5:15 AM EDT	Flash Flood Warning	BUF	Genesee, Niagara, Orleans	109 min
Aug 10, 6:02 AM EDT	Flash Flood Warning	BUF	Genesee, Livingston, Monroe, Ontario, Orleans, Wayne	109 min
Aug 10, 6:38 AM EDT	Special Marine Warning	BUF		52 min
Aug 10, 6:43 AM EDT	Flash Flood Warning	BUF	Chautauqua	3 hr
Aug 10, 9:33 AM EDT	River Flood Warning	BUF	Erie, Wyoming	4 hr
Aug 10, 2:40 PM EDT	Severe Thunderstorm Warning	BUF	Ontario, Wayne	55 min
Aug 10, 2:52 PM EDT	Flash Flood Warning	BUF	Chautauqua	76 min
Aug 10, 3:17 PM EDT	Severe Thunderstorm Warning	BUF	Wayne	58 min
Aug 10, 3:46 PM EDT	Areal Flood Advisory	BUF	Wayne	6 hr
Aug 10, 4:13 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga	20 min
Aug 10, 4:50 PM EDT	Severe Thunderstorm Warning	BUF	Niagara	30 min
Aug 10, 5:08 PM EDT	Flash Flood Warning	BUF	Niagara	45 min
Aug 10, 5:12 PM EDT	Special Marine Warning	BUF		40 min
Aug 10, 5:45 PM EDT	Special Marine Warning	BUF		99 min
Aug 10, 6:21 PM EDT	Severe Thunderstorm Warning	BUF	Monroe, Wayne	54 min
Aug 10, 6:50 PM EDT	Severe Thunderstorm Warning	BUF	Wayne	55 min
Aug 10, 7:00 PM EDT	Special Marine Warning	BUF		43 min
Aug 10, 7:08 PM EDT	Flash Flood Warning	BUF	Wayne	3 hr
Aug 10, 7:41 PM EDT	Flash Flood Warning	BUF	Cayuga	3 hr

Nearby

Flash Flood Warnings in New York, 2009 Every flash flood warning in 2009

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.