Alert archive / New York / Flash Flood Warnings in 2000

Flash Flood Warning 12, NWS Buffalo, NY

July 31, 2000Ontario County, New York

NWS Buffalo, NY issued this flash flood warning at Jul 31, 2000, 7:39 PM EDT for Ontario County, New York. It was in force for 111 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued: Jul 31, 2000, 7:39 PM EDT (23:39 UTC)
Expired: Jul 31, 2000, 9:30 PM EDT
In force: 111 min
Issued by: NWS Buffalo, NY
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Ontario County, NY

The radar

The Buffalo radar (KBUF), 126 km from the middle of the area, began a volume at 23:40 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, 11.7 hours before the alert went out and 123 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: 922 J/kg
Mixed-layer CIN: -54 J/kg
Mixed-layer LCL: 840 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 60 m²/s²
0-3 km storm-relative helicity: 80 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.0

Open this sounding in Storm Lab

The text

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

000 
WGUS51 KBUF 312342
FFWBUF
NYC069-010130-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
739 PM EDT MON JUL 31 2000

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EASTERN ONTARIO COUNTY IN WESTERN NEW YORK
  THIS INCLUDES THE CITIES OF...GORHAM...GENEVA

* UNTIL 930 PM EDT

* AT 730 PM EDT...WEATHER SERVICE DOPPLER RADAR SHOWED THUNDERSTORMS
  WITH VERY HEAVY RAIN 8 MILES SOUTHWEST OF GENEVA...DRIFTING NORTHEAST
  AT 5 MPH.

THE HEAVY RAINFALL AND SLOW MOVEMENT OF THESE STORMS MAY RESULT IN 
FLOODING OF ROADS AND LOW-LYING AREAS.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING. 
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
  
DO NOT ATTEMPT TO CROSS SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN 
DEPTH BY FOOT OR BY AUTOMOBILE. IF YOUR VEHICLE STALLS, ABANDON IT 
IMMEDIATELY AND SEEK HIGHER GROUND.

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

LAT...LON 4302 7732 4278 7733 4279 7700 4300 7697

PACE

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 31, 3:32 PM EDT	Flash Flood Warning	BUF	Cattaraugus	118 min
Jul 31, 5:11 PM EDT	Flash Flood Warning	BUF	Chautauqua	2 hr
Jul 31, 5:29 PM EDT	Flash Flood Warning	BUF	Cattaraugus	106 min
Jul 31, 6:25 PM EDT	Flash Flood Warning	BUF	Ontario	95 min

Nearby

Flash Flood Warnings in New York, 2000 Every flash flood warning in 2000

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.