Alert archive / New York / Flash Flood Warnings in 2003

Flash Flood Warning 9, NWS Buffalo, NY

August 5, 2003Allegany County, New York

NWS Buffalo, NY issued this flash flood warning at Aug 5, 2003, 3:45 PM EDT for Allegany 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: Aug 5, 2003, 3:45 PM EDT (19:45 UTC)
Expired: Aug 5, 2003, 5:45 PM EDT
In force: 2 hr
Issued by: NWS Buffalo, NY
Area: Counties, with a storm outline in the text

County Allegany County, NY

The radar

The Buffalo radar (KBUF), 113 km from the middle of the area, began a volume at 19:45 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, 7.8 hours before the alert went out and 110 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: 268 J/kg
Mixed-layer CIN: -42 J/kg
Mixed-layer LCL: 1016 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: -2 m²/s²
0-3 km storm-relative helicity: 13 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 051945
FFWBUF
NYC003-052145-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
345 PM EDT TUE AUG 5 2003

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

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

* UNTIL 545 PM EDT

* AT 340 PM EDT...SOME FLOODING WAS REPORTED BY COUNTY LAW 
  ENFORCEMENT ON ROADWAYS IN ANDOVER AND WELLSVILLE...INCLUDING 
  ROUTE 417. RAIN CONTINUED TO MOVE OVER SOUTHEAST ALLEGANY 
  COUNTY...MOVING NORTH AT 30 MPH.

* THE THUNDERSTORM WITH EXCESSIVE RAINFALL WILL BE...  
  OVER WELLSVILLE AND ANDOVER AT LEAST THROUGH 430 PM.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY. IF
YOU LIVE ALONG A STREAM OR CREEK ACT NOW TO PROTECT LIFE AND
PROPERTY. DO NOT ATTEMPT TO CROSS SWIFTLY FLOWING WATERS OR WATERS OF
UNKNOWN DEPTH BY FOOT OR BY AUTOMOBILE.

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL 
CREEKS AND STREAMS. ADDITIONALLY...COUNTRY ROADS AND FARMLANDS ALONG 
THE BANKS OF CREEKS AND STREAMS AND OTHER LOW LYING AREAS ARE 
SUBJECT TO FLASH FLOODING.

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

LAT...LON 4205 7790 4205 7767 4235 7767 4241 7798

$$

DJF

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 5, 12:24 PM EDT	Severe Thunderstorm Warning	BUF	Erie	36 min
Aug 5, 12:56 PM EDT	Severe Thunderstorm Warning	BUF	Wyoming	34 min
Aug 5, 1:55 PM EDT	Special Marine Warning	BUF		50 min
Aug 5, 1:55 PM EDT	Special Marine Warning	BUF		50 min
Aug 5, 1:55 PM EDT	Special Marine Warning	BUF		50 min
Aug 5, 1:55 PM EDT	Special Marine Warning	BUF		50 min
Aug 5, 3:38 PM EDT	Flash Flood Warning	BUF	Ontario	112 min
Aug 5, 4:22 PM EDT	Flash Flood Warning	BUF	Monroe, Wayne	53 min
Aug 5, 4:23 PM EDT	Severe Thunderstorm Warning	BUF	Oswego	52 min
Aug 5, 4:34 PM EDT	Flash Flood Warning	BUF	Wyoming	26 min
Aug 5, 4:54 PM EDT	Flash Flood Warning	BUF	Lewis, Oswego	2 hr
Aug 5, 4:59 PM EDT	Flash Flood Warning	BUF	Wyoming	31 min
Aug 5, 5:05 PM EDT	Severe Thunderstorm Warning	BUF	Lewis	55 min
Aug 5, 5:06 PM EDT	Flash Flood Warning	BUF	Wayne	54 min
Aug 5, 5:19 PM EDT	Flash Flood Warning	BUF	Allegany	56 min
Aug 5, 5:24 PM EDT	Flash Flood Warning	BUF	Wyoming	36 min

Nearby

Flash Flood Warnings in New York, 2003 Every flash flood warning in 2003

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.