Alert archive / New York / Areal Flood Advisories in 2011

Areal Flood Advisory 32, NWS Buffalo, NY

May 23, 20114 counties in New York

NWS Buffalo, NY issued this areal flood advisory at May 23, 2011, 10:56 PM EDT for 4 counties in New York. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
May 23, 2011, 10:56 PM EDT (02:56 UTC)
Expired
May 24, 2011, 2:00 AM EDT
In force
3 hr
Issued by
NWS Buffalo, NY
Area
Storm-based polygon

Counties Cattaraugus County, NY, Chautauqua County, NY, Erie County, NY, Wyoming County, NY

The radar

The Buffalo radar (KBUF), 50 km from the middle of the area, began a volume at 03:00 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 00:00Z, 2.9 hours before the alert went out and 48 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 00:00Z on 2011-05-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 191 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 00:00Z on 2011-05-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 172 square meters per square second.19395878Sfc1 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
191 J/kg
Mixed-layer CIN
-15 J/kg
Mixed-layer LCL
1252 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
172 m²/s²
0-3 km storm-relative helicity
226 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.4

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal flood advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Buffalo, NY wrote its last area forecast discussion before this areal flood advisory went out at May 23, 10:26 PM EDT, 30 minutes earlier.

Area forecast discussion, May 23, 10:26 PM EDT, 30 minutes before
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Hazardous weather outlook, May 23, 5:07 AM EDT, 17 hours 49 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BUFFALO NY
507 AM EDT MON MAY 23 2011

NYZ001>008-010>014-019>021-085-240915-
NIAGARA-ORLEANS-MONROE-WAYNE-NORTHERN CAYUGA-OSWEGO-JEFFERSON-LEWIS-
NORTHERN ERIE-GENESEE-WYOMING-LIVINGSTON-ONTARIO-CHAUTAUQUA-
CATTARAUGUS-ALLEGANY-SOUTHERN ERIE-
507 AM EDT MON MAY 23 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN AND NORTH CENTRAL NEW
YORK.

.DAY ONE...TODAY AND TONIGHT.

THE STORM PREDICTION CENTER HAS PLACED MOST OF WESTERN AND NORTH
CENTRAL NEW YORK IN A SLIGHT RISK FOR SEVERE THUNDERSTORMS TODAY.
SCATTERED TO NUMEROUS THUNDERSTORMS ARE EXPECTED TO DEVELOP ACROSS
THE AREA DURING THE AFTERNOON AND EVENING...SOME OF WHICH COULD BE
STRONG TO SEVERE WITH THE PRIMARY THREAT COMING IN THE FORM OF
STRONG DAMAGING WINDS...WITH HAIL ALSO POSSIBLE. A FEW OF THESE
STORMS MAY ALSO PRODUCE LOCALIZED HEAVY RAINFALL AND POOR DRAINAGE
FLOODING.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

ADDITIONAL SHOWERS AND THUNDERSTORMS ARE EXPECTED FROM WEDNESDAY
NIGHT THROUGH AT LEAST FRIDAY AS A SLOW MOVING FRONTAL SYSTEM SETS
UP ACROSS THE REGION. ADDITIONAL HEAVY RAINFALL WILL BE POSSIBLE
DURING THIS TIME FRAME...POTENTIALLY LEADING TO ADDITIONAL
FLOODING CONCERNS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

THIS PRODUCT...ALONG WITH OTHER WATCHES...WARNINGS...ADVISORIES...
AND STATEMENTS ISSUED BY THE NATIONAL WEATHER SERVICE OFFICE IN
BUFFALO CAN BE FOUND ON THE INTERNET AT HTTP://WWW.WEATHER.GOV/BUF

LEZ020-040-041-LOZ030-042>045-062>065-SLZ022-024-240915-
UPPER NIAGARA RIVER AND BUFFALO HARBOR-
LAKE ERIE NEARSHORE WATERS FROM RIPLEY TO DUNKIRK-
LAKE ERIE NEARSHORE WATERS FROM DUNKIRK TO BUFFALO-
LOWER NIAGARA RIVER-
LAKE ONTARIO NEARSHORE WATERS FROM THE NIAGARA RIVER TO HAMLIN BEACH-
LAKE ONTARIO NEARSHORE WATERS FROM HAMLIN BEACH TO SODUS BAY-
LAKE ONTARIO NEARSHORE WATERS FROM SODUS BAY TO MEXICO BAY-
LAKE ONTARIO NEARSHORE WATERS FROM MEXICO BAY TO THE SAINT LAWRENCE
RIVER-
LAKE ONTARIO OPEN WATERS FROM THE NIAGARA RIVER TO HAMLIN BEACH-
LAKE ONTARIO OPEN WATERS FROM HAMLIN BEACH TO SODUS BAY-
LAKE ONTARIO OPEN WATERS FROM SODUS BAY TO MEXICO BAY-
LAKE ONTARIO OPEN WATERS FROM MEXICO BAY TO THE SAINT LAWRENCE RIVER-
SAINT LAWRENCE RIVER FROM CAPE VINCENT TO OGDENSBURG-
SAINT LAWRENCE RIVER FROM OGDENSBURG TO SAINT REGIS-
507 AM EDT MON MAY 23 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF LAKE ERIE...LAKE
ONTARIO AND SAINT LAWRENCE RIVER.

.DAY ONE...TODAY AND TONIGHT.

THE STORM PREDICTION CENTER HAS PLACED THE LOWER GREAT LAKES
REGION IN A SLIGHT RISK FOR SEVERE THUNDERSTORMS TODAY. SCATTERED
TO NUMEROUS THUNDERSTORMS ARE EXPECTED TO DEVELOP ACROSS THE AREA
DURING THE AFTERNOON AND EVENING...SOME OF WHICH COULD BE STRONG
TO SEVERE WITH THE PRIMARY THREAT COMING IN THE FORM OF STRONG
WIND GUSTS AND HAIL.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

THIS PRODUCT...ALONG WITH OTHER WATCHES...WARNINGS...ADVISORIES...
AND STATEMENTS ISSUED BY THE NATIONAL WEATHER SERVICE OFFICE IN
BUFFALO CAN BE FOUND ON THE INTERNET AT HTTP://WWW.WEATHER.GOV/BUF

JJR

In the hours before

Special weather statement, May 23, 8:19 PM EDT, 2 hours 37 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
819 PM EDT MON MAY 23 2011

NYZ019-240230-
CHAUTAUQUA-
INCLUDING THE CITY OF...JAMESTOWN
819 PM EDT MON MAY 23 2011

...STRONG THUNDERSTORMS MOVING INTO CHAUTAUQUA COUNTY...
AN AREA OF STRONG THUNDERSTORMS IS MOVING INTO CHAUTAUQUA COUNTY
FROM ERIE COUNTY PENNSYLVANIA. THESE STRONG THUNDERSTORMS WILL
PRODUCE GUSTY WINDS...SMALL HAIL...FREQUENT LIGHTNING AND HEAVY
DOWNPOURS. THE STRONGEST STORM IS EXPECTED TO REACH JAMESTOWN
AROUND 840 PM. IF YOU SEE LIGHTNING OR HEAR THUNDER...GO IN A
STURDY BUILDING IMMEDIATELY.

DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD...IT IS
DIFFICULT TO DETERMINE HOW DEEP THE WATER IS.

DPK
Special weather statement, May 23, 9:42 PM EDT, 1 hour 14 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
May 23, 8:23 PM EDTSevere Thunderstorm WarningBUFChautauqua37 min
May 23, 8:45 PM EDTSpecial Marine WarningBUF30 min
May 23, 8:54 PM EDTTornado WarningBUFChautauqua36 min
May 23, 9:14 PM EDTSevere Thunderstorm WarningBUFErie17 min
May 23, 9:24 PM EDTFlash Flood WarningBUFChautauqua3 hr
May 23, 9:59 PM EDTFlash Flood WarningBUFCattaraugus, Chautauqua3 hr
May 23, 10:05 PM EDTSevere Thunderstorm WarningBUFAllegany, Cattaraugus25 min
May 23, 10:30 PM EDTSevere Thunderstorm WarningBUFAllegany, Cattaraugus45 min
May 23, 11:09 PM EDTFlash Flood WarningBUFAllegany, Cattaraugus, Wyoming3 hr
May 23, 11:13 PM EDTSevere Thunderstorm WarningBUFAllegany17 min
May 24, 9:27 AM EDTSmall Craft AdvisoryBUF4 hr

Nearby

Areal Flood Advisories in New York, 2011Every areal flood advisory in 2011

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.