Alert archive / New York / Flash Flood Warnings in 2011
Flash Flood Warning 9, NWS Buffalo, NY
NWS Buffalo, NY issued this flash flood warning at May 23, 2011, 9:24 PM EDT for Chautauqua County, New York. It was in force for 3 hr. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- May 23, 2011, 9:24 PM EDT (01:24 UTC)
- Expired
- May 24, 2011, 12:15 AM EDT
- In force
- 3 hr
- Issued by
- NWS Buffalo, NY
- Area
- Storm-based polygon
- Flood severity
- None
County Chautauqua County, NY
The radar
The Buffalo radar (KBUF), 110 km from the middle of the area, began a volume at 01:27 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 23, 11:30 PM EDT | FLASH FLOOD | Lakewood, NY | SEVERAL ROADS CLOSED IN LAKEWOOD |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Buffalo Intl Airport, NY (KBUF), launched 00:00Z, 1.4 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.
- 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
The text
As transmitted, in the capitals the NWS used until 2016.
411
WGUS51 KBUF 240124
FFWBUF
NYC013-240415-
/O.NEW.KBUF.FF.W.0009.110524T0124Z-110524T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
924 PM EDT MON MAY 23 2011
THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A
* FLASH FLOOD WARNING FOR...
CHAUTAUQUA COUNTY IN WESTERN NEW YORK...
THIS INCLUDES THE CITY OF JAMESTOWN...
* UNTIL 1215 AM EDT
* AT 920 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
A LINE OF STRONG TO SEVERE THUNDERSTORMS THAT WILL TRAIN ACROSS
MUCH OF CHAUTAUQUA COUNTY. DOPPLER RADAR ALREADY ESTIMATES THAT
OVER AN INCH OF RAIN HAS FALLEN ACROSS THE SOUTHERN THIRD OF THE
COUNTY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.
&&
LAT...LON 4226 7978 4229 7975 4238 7954 4240 7907
4199 7908 4199 7958 4199 7976 4200 7977
$$
RSH2 follow-up statements
790
WGUS71 KBUF 240242
FFSBUF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
1042 PM EDT MON MAY 23 2011
NYC013-240415-
/O.CON.KBUF.FF.W.0009.000000T0000Z-110524T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CHAUTAUQUA NY-
1042 PM EDT MON MAY 23 2011
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1215 AM EDT FOR
CHAUTAUQUA COUNTY...
AT 1035 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE WIDESPREAD THUNDERSTORM ACTIVITY WHICH IS PRODUCING
RAINFALL RATES IN EXCESS OF ONE INCH PER HOUR. DOPPLER RADAR
ESTIMATES THAT SOME AREAS WITHIN THE WARNED AREA HAVE ALREADY
RECEIVED MORE THAN 2 INCHES OF RAIN...WITH ANOTHER INCH ORE MORE OF
RAIN POSSIBLE BEFORE THE STORMS END.
LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO CHAUTAUQUA
INSTITUTE...WESTFIELD AND MAYVILLE
PRECAUTIONARY/PREPAREDNESS ACTIONS...
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.
&&
LAT...LON 4226 7978 4229 7975 4238 7954 4240 7907
4199 7908 4199 7958 4199 7976 4200 7977
$$
RSH837
WGUS71 KBUF 240425
FFSBUF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
1225 AM EDT TUE MAY 24 2011
NYC013-240435-
/O.EXP.KBUF.FF.W.0009.000000T0000Z-110524T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CHAUTAUQUA NY-
1225 AM EDT TUE MAY 24 2011
...THE FLASH FLOOD WARNING HAS EXPIRED FOR CHAUTAUQUA COUNTY...
PONDING OF LOW LYING AND POOR DRAINAGE AREAS WILL STILL BE POSSIBLE
FOR AWHILE UNTIL THE WATER HAS TIME TO RUN OFF.
LAT...LON 4226 7978 4229 7975 4238 7954 4240 7907
4199 7908 4199 7958 4199 7976 4200 7977
$$
RSHThe office that day
Everything else NWS Buffalo, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 23, 8:23 PM EDT | Severe Thunderstorm Warning | BUF | Chautauqua | 37 min |
| May 23, 8:45 PM EDT | Special Marine Warning | BUF | 30 min | |
| May 23, 8:54 PM EDT | Tornado Warning | BUF | Chautauqua | 36 min |
| May 23, 9:14 PM EDT | Severe Thunderstorm Warning | BUF | Erie | 17 min |
| May 23, 9:59 PM EDT | Flash Flood Warning | BUF | Cattaraugus, Chautauqua | 3 hr |
| May 23, 10:05 PM EDT | Severe Thunderstorm Warning | BUF | Allegany, Cattaraugus | 25 min |
| May 23, 10:30 PM EDT | Severe Thunderstorm Warning | BUF | Allegany, Cattaraugus | 45 min |
| May 23, 10:56 PM EDT | Areal Flood Advisory | BUF | Cattaraugus, Chautauqua, Erie, Wyoming | 3 hr |
| May 23, 11:09 PM EDT | Flash Flood Warning | BUF | Allegany, Cattaraugus, Wyoming | 3 hr |
| May 23, 11:13 PM EDT | Severe Thunderstorm Warning | BUF | Allegany | 17 min |
| May 24, 9:27 AM EDT | Small Craft Advisory | BUF | 4 hr |
Nearby
Flash Flood Warnings in New York, 2011Every flash flood warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.