Alert archive / New York / Flash Flood Warnings in 2004

Flash Flood Warning 19, NWS Buffalo, NY

July 17, 2004Wyoming County, New York

NWS Buffalo, NY issued this flash flood warning at Jul 17, 2004, 6:38 PM EDT for Wyoming County, New York. It was in force for 2 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 17, 2004, 6:38 PM EDT (22:38 UTC)
Expired
Jul 17, 2004, 8:45 PM EDT
In force
2 hr
Issued by
NWS Buffalo, NY
Area
Counties, with a storm outline in the text

County Wyoming County, NY

The radar

The Buffalo radar (KBUF), 48 km from the middle of the area, began a volume at 22:41 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, 10.6 hours before the alert went out and 44 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 12:00Z on 2004-07-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 131 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 12:00Z on 2004-07-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 28 square meters per square second.1939Sfc1 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
131 J/kg
Mixed-layer CIN
-91 J/kg
Mixed-layer LCL
1043 m above ground
0-6 km bulk shear
6 kt
0-1 km storm-relative helicity
28 m²/s²
0-3 km storm-relative helicity
36 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.

000 
WGUS51 KBUF 172239
FFWBUF
NYC121-180045-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
638 PM EDT SAT JUL 17 2004

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

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

* UNTIL 845 PM EDT

* AT 631 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR A LINE OF
  THUNDERSTORMS EXTENDING FROM BLISS TO VARYSBURG. THE STORMS WERE
  PRODUCING TORRENTIAL RAINS AND WERE NEARLY STATIONARY.

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.

TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN
BUFFALO.

LAT...LON 4252 7823 4285 7823 4285 7843 4253 7843

$$

LEVAN
2 follow-up statements
000 
WGUS71 KBUF 180011
FFSBUF
NYC121-180045-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
810 PM EDT SAT JUL 17 2004

...A FLASH FLOOD WARNING FOR WYOMING COUNTY CONTINUES UNTIL 845 PM 
EDT...

SHOWERS AND THUNDERSTORMS CONTINUE ACROSS WESTERN WYOMING COUNTY.
DOPPLER RADAR ESTIMATES THAT UP TO 4 INCHES OF RAIN HAS FALLEN IN 
SOME AREAS OVER THE PAST THREE HOURS. WHILE THE SHOWERS AND 
THUNDERSTORMS HAVE WEAKENED SOMEWHATR...RAIN WILL CONTINUE THROUGH 
THE NEXT HOUR OR SO WITH ADDITIONAL RAINFALL OF ANOTHER INCH 
POSSIBLE.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL MAY 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.

TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN
BUFFALO.

LAT...LON 4252 7823 4285 7823 4285 7843 4253 7843

$$

LEVAN
000 
WGUS71 KBUF 180053
FFSBUF
NYC121-180055-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
855 PM EDT SAT JUL 17 2004

THE FLASH FLOOD WARNING FOR WYOMING COUNTY HAS EXPIRED. 

SHOWERS AND THUNDERSTORMS HAVE WEAKENED AND WILL DISSIPATE OVER THE 
NEXT HOUR OR SO. 

LAT...LON 4252 7823 4285 7823 4285 7843 4253 7843

$$

LEVAN

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 17, 4:32 PM EDTSevere Thunderstorm WarningBUFGenesee, Orleans58 min
Jul 17, 4:59 PM EDTSevere Thunderstorm WarningBUFOntario61 min
Jul 17, 5:23 PM EDTSevere Thunderstorm WarningBUFNiagara52 min
Jul 17, 7:16 PM EDTFlash Flood WarningBUFCattaraugus119 min

Nearby

Flash Flood Warnings in New York, 2004Every 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.