Alert archive / New York / Flash Flood Warnings in 2011
Flash Flood Warning 8, NWS Buffalo, NY
NWS Buffalo, NY issued this flash flood warning at May 19, 2011, 5:21 PM EDT for Cattaraugus County, New York. It was in force for 3 hr. 2 reports 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 19, 2011, 5:21 PM EDT (21:21 UTC)
- Expired
- May 19, 2011, 8:15 PM EDT
- In force
- 3 hr
- Issued by
- NWS Buffalo, NY
- Area
- Storm-based polygon
- Flood severity
- None
County Cattaraugus County, NY
The radar
The Buffalo radar (KBUF), 78 km from the middle of the area, began a volume at 21:22 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 19, 5:30 PM EDT | FLASH FLOOD | Little Valley, NY | SEVERAL ROADS CLOSED IN LITTLE VALLEY. |
| May 19, 6:34 PM EDT | FLASH FLOOD | Little Valley, NY | 2 TO 2.5 FEET OF WATER ACROSS MANY ROADS HALF OF THE VILLAGE SHUT DOWN. |
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 12:00Z, 9.4 hours before the alert went out and 76 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 706 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 11 m²/s²
- 0-3 km storm-relative helicity
- 99 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
034 WGUS51 KBUF 192121 FFWBUF NYC009-200015- /O.NEW.KBUF.FF.W.0008.110519T2121Z-110520T0015Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE BUFFALO NY 521 PM EDT THU MAY 19 2011 THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A * FLASH FLOOD WARNING FOR... CENTRAL CATTARAUGUS COUNTY IN WESTERN NEW YORK... * UNTIL 815 PM EDT * AT 517 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED FLASH FLOODING FROM A THUNDERSTORM OVER THE WARNED AREA. PRECAUTIONARY/PREPAREDNESS ACTIONS... 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. IN HILLY TERRAIN THERE ARE HUNDREDS OF LOW WATER CROSSINGS WHICH ARE POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO TRAVEL ACROSS FLOODED ROADS. FIND ALTERNATE ROUTES. IT ONLY TAKES A FEW INCHES OF SWIFTLY FLOWING WATER TO CARRY VEHICLES AWAY. && LAT...LON 4229 7889 4230 7870 4219 7870 4219 7888 $$ TJP
3 follow-up statements
629 WGUS71 KBUF 192154 FFSBUF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE BUFFALO NY 554 PM EDT THU MAY 19 2011 NYC009-200015- /O.CON.KBUF.FF.W.0008.000000T0000Z-110520T0015Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CATTARAUGUS NY- 554 PM EDT THU MAY 19 2011 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 815 PM EDT FOR CENTRAL CATTARAUGUS COUNTY... AT 545 PM EDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED SEVERAL ROADS CLOSED IN LITTLE VALLEY...INCLUDING ROUTE 353. NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED ABOUT TWO INCHES OF RAIN HAS FALLEN IN LITTLE VALLEY...WITH ANOTHER ONE HALF POSSIBLE AS RAIN CONTINUES TO LIFT NORTH ACROSS THE WARNED AREA. LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO LITTLE VALLEY PRECAUTIONARY/PREPAREDNESS ACTIONS... EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW LYING AREAS ARE SUBJECT TO FLOODING. A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING. IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY. RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY AUTOMOBILE. && LAT...LON 4229 7889 4230 7870 4219 7870 4219 7888 $$ TJP
756 WGUS71 KBUF 192246 FFSBUF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE BUFFALO NY 646 PM EDT THU MAY 19 2011 NYC009-200015- /O.CON.KBUF.FF.W.0008.000000T0000Z-110520T0015Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CATTARAUGUS NY- 646 PM EDT THU MAY 19 2011 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 815 PM EDT FOR CENTRAL CATTARAUGUS COUNTY... AT 637 PM EDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED 2.O TO 2.5 FEET OF WATER FLOODING SEVERAL ROADS IN LITTLE VALLEY. EVEN THOUGH THE RAIN HAS ENDED...FLOODING WILL CONTINUE. LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO LITTLE VALLEY PRECAUTIONARY/PREPAREDNESS ACTIONS... EXCESSIVE RUNOFF FROM PREVIOUS HEAVY RAINFALL WILL CONTINUE TO CAUSE FLOODING OF HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW LYING AREAS ARE SUBJECT TO FLOODING. A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING. IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY. RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY AUTOMOBILE. && LAT...LON 4229 7889 4230 7870 4219 7870 4219 7888 $$ TJP
692 WGUS71 KBUF 200011 FFSBUF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE BUFFALO NY 811 PM EDT THU MAY 19 2011 NYC009-200020- /O.EXP.KBUF.FF.W.0008.000000T0000Z-110520T0015Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CATTARAUGUS NY- 811 PM EDT THU MAY 19 2011 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 815 PM EDT FOR CENTRAL CATTARAUGUS COUNTY... THE INTENSE LOCALIZED STORM WHICH BROUGHT UP TO THREE INCHES OF RAIN IN AN HOUR BETWEEN 5 AND 6 PM HAS DISSIPATED BUT CAUSED CONSIDERABLE FLOODING IN THE VILLAGE OF LITTLE VALLEY. PONDING OF LOW LYING AND POOR DRAINAGE AREAS WILL STILL BE POSSIBLE FOR AWHILE UNTIL THE WATER HAS TIME TO RUN OFF. LAT...LON 4229 7889 4230 7870 4219 7870 4219 7888 $$ SFM
The office that day
Everything else NWS Buffalo, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 19, 1:09 PM EDT | Areal Flood Advisory | BUF | Cayuga, Oswego | 3 hr |
| May 19, 1:17 PM EDT | Areal Flood Advisory | BUF | Allegany, Livingston, Wyoming | 3 hr |
| May 19, 4:08 PM EDT | Special Weather Statement | BUF | Chautauqua | 52 min |
| May 19, 4:18 PM EDT | Special Weather Statement | BUF | Ontario | 57 min |
| May 19, 4:38 PM EDT | Special Weather Statement | BUF | Ontario | 52 min |
| May 19, 4:54 PM EDT | Areal Flood Advisory | BUF | Ontario | 115 min |
| May 19, 5:05 PM EDT | Special Weather Statement | BUF | Cattaraugus | 55 min |
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.