Alert archive / New York / Flash Flood Warnings in 1999

Flash Flood Warning 19, NWS Buffalo, NY

August 24, 1999Erie County, New York

NWS Buffalo, NY issued this flash flood warning at Aug 24, 1999, 5:39 PM EDT for Erie County, New York. It was in force for 61 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Aug 24, 1999, 5:39 PM EDT (21:39 UTC)
Expired
Aug 24, 1999, 6:40 PM EDT
In force
61 min
Issued by
NWS Buffalo, NY
Area
Whole counties

County Erie County, NY

The radar

The Buffalo radar (KBUF), 21 km from the middle of the area, began a volume at 21:43 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, 9.7 hours before the alert went out and 20 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 1999-08-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 283 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°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 1999-08-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 9 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
283 J/kg
Mixed-layer CIN
-91 J/kg
Mixed-layer LCL
1363 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
9 m²/s²
0-3 km storm-relative helicity
62 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 
TTAA00 KBUF 242141
FFWBUF
NYC029-242240-

BULLETIN - EAS ACTIVATION REQUESTED
FLOOD WARNING FOR URBAN AREAS AND SMALL STREAMS
NATIONAL WEATHER SERVICE BUFFALO NY
539 PM EDT TUE AUG 24 1999

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* FLOOD WARNING FOR URBAN AREAS AND SMALL STREAMS FOR...
  NORTHERN ERIE COUNTY IN WESTERN NEW YORK

* UNTIL 640 PM EDT

* AT AT 535 PM EDT... NATIONAL WEATHER SERVICE DOPPLER RADAR
  INDICATED AN AREA OF THUNDERSTORMS WITH VERY HEAVY RAIN
  EXTENDING FROM NORTH BUFFALO TO LANCASTER...CONTINUING NORTH TO
  CLARENCE. RADAR PRECIPITATION ESTIMATES INDICATE ALMOST 2 INCHES OF
  RAIN PER HOUR IN THESE THUNDERSTORMS. *

DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD!

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 24, 6:25 PM EDTSevere Thunderstorm WarningBUFNiagara35 min

Nearby

Flash Flood Warnings in New York, 1999Every flash flood warning in 1999

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.