Alert archive / New York / Flash Flood Warnings in 2004

Flash Flood Warning 18, NWS Buffalo, NY

July 12, 2004Jefferson County, New York

NWS Buffalo, NY issued this flash flood warning at Jul 12, 2004, 3:43 PM EDT for Jefferson 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 12, 2004, 3:43 PM EDT (19:43 UTC)
Expired: Jul 12, 2004, 5:45 PM EDT
In force: 2 hr
Issued by: NWS Buffalo, NY
Area: Counties, with a storm outline in the text

County Jefferson County, NY

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 7.7 hours before the alert went out and 230 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: 41 J/kg
Mixed-layer CIN: -121 J/kg
Mixed-layer LCL: 653 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 110 m²/s²
0-3 km storm-relative helicity: 125 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

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

000 
WGUS51 KBUF 121945
FFWBUF
NYC045-122145-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
343 PM EDT MON JUL 12 2004


THE NATIONAL WEATHER SERVICE IN BUFFALO HAS EXTENDED A

* FLASH FLOOD WARNING FOR...
  JEFFERSON COUNTY IN CENTRAL NEW YORK

* UNTIL 545 PM EDT

* AT 340 PM EDT...FLASH FLOODING WAS REPORTED FROM THUNDERSTORMS     
  THAT EXTENDED FROM ROUTE 81 ABOUT 5 MILES EAST OF                  
  CLAYTON...THROUGH FORT DRUM...TO 5 MILES WEST OF NATURAL BRIDGE.   
  THE LINE OF STORMS WAS NEARLY STATIONARY.

* THE THUNDERSTORM PRODUCING FLASH FLOODING WILL CONTINUE ACROSS     
  NORTHERN JEFFERSON COUNTY THROUGH 545 PM.

RADAR ESTIMATES THAT STORM TOTAL RAINFALL IN THESE AREAS HAS 
APPROACHED 4 INCHES. ADDITIONAL RAIN WILL CONTINUE AT RATES OF AN 
INCH AN HOUR THROUGH 545 PM.  

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. CAMPERS AND HIKERS SHOULD BE ESPECIALLY AWARE OF RAPIDLY 
RISING OR FLOODED STREAMS OR CREEKS.

LAT...LON 4419 7603 4406 7581 4404 7559 4423 7554
      4434 7584

$$

NIZIOL

2 follow-up statements

000 
WGUS71 KBUF 122037
FFSBUF
NYC045-122145-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
436 PM EDT MON JUL 12 2004

...A FLASH FLOOD WARNING CONTINUES UNTIL 545 PM EDT FOR JEFFERSON
COUNTY...

AT 430 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE THUNDERSTORMS WITH HEAVY ENOUGH RAIN TO PRODUCE FLASH 
FLOODING.  THESE STORMS WERE LOCATED NEAR THE NORTHERN SECTIONS OF 
INTERSTATE 81 FROM THE TOWNS OF CLAYTON EASTWARD TO THERESA. DOPPLER 
RADAR INDICATES THAT MORE THAN 4 INCHES HAS FALLEN IN THE MOST 
PERSISTENT HEAVY RAIN AREAS.  THE STORMS WERE BEGINNING TO SHOW 
SIGNS OF WEAKENING BUT THEY WERE NEARLY STATIONARY AND ANOTHER INCH 
OF RAIN IS LIKELY THROUGH 545 PM.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL 
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE 
BANKS OF CREEKS AND STREAMS.

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 4419 7603 4406 7581 4404 7559 4423 7554
      4434 7584

$$

SAGE

000 
WGUS71 KBUF 122152
FFSBUF
NYC045-122145-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
551 PM EDT MON JUL 12 2004

...THE FLASH FLOOD WARNING FOR JEFFERSON COUNTY EXPIRED AT 545 PM 
EDT...

SHOWERS AND A FEW EMBEDDED THUNDERSTORMS CONTINUED TO WEAKEN OVER 
THE REGION THAT RECEIVED THE HEAVIEST RAIN.  WEAKENING IS EXPECTED 
TO CONTINUE.

REPORTS RECEIVED SO FAR INDICATE THAT COUNTY ROAD 15 WAS WASHED OUT 
AND ROUTE 37 WAS COVERED WITH WATER FROM ROUTE 411 TO CREEK ROAD.  
NUMEROUS BASEMENT FLOODING WAS ALSO REPORTED. 

LAT...LON 4419 7603 4406 7581 4404 7559 4423 7554
      4434 7584

$$

SAGE

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 12, 12:47 PM EDT	Flash Flood Warning	BUF	Jefferson	3 hr

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.