Alert archive / New York / Flash Flood Warnings in 2011
Flash Flood Warning 21, NWS Buffalo, NY
NWS Buffalo, NY issued this flash flood warning at Sep 9, 2011, 5:12 PM EDT for Cattaraugus County, Chautauqua County, New York. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Sep 9, 2011, 5:12 PM EDT (21:12 UTC)
- Expired
- Sep 9, 2011, 8:15 PM EDT
- In force
- 3 hr
- Issued by
- NWS Buffalo, NY
- Area
- Storm-based polygon
- Flood severity
- None
Counties Cattaraugus County, NY, Chautauqua County, NY
The radar
The Buffalo radar (KBUF), 106 km from the middle of the area, began a volume at 21:13 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, 9.2 hours before the alert went out and 105 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
- 6 J/kg
- Mixed-layer CIN
- -233 J/kg
- Mixed-layer LCL
- 731 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- -3 m²/s²
- 0-3 km storm-relative helicity
- 36 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
969 WGUS51 KBUF 092112 FFWBUF NYC009-013-100015- /O.NEW.KBUF.FF.W.0021.110909T2112Z-110910T0015Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE BUFFALO NY 512 PM EDT FRI SEP 9 2011 THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A * FLASH FLOOD WARNING FOR... SOUTHWESTERN CATTARAUGUS COUNTY IN WESTERN NEW YORK... SOUTHEASTERN CHAUTAUQUA COUNTY IN WESTERN NEW YORK... * UNTIL 815 PM EDT * AT 507 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT SLOW MOVING THUNDERSTORMS HAVE PRODUCED OVER TWO INCHES OF RAIN SINCE 330 PM ACROSS THE WARNED AREA. MORE THUNDERSTORM ACTIVITY WILL PUSH INTO THE WARNED AREA FROM NORTHERN PENNSYLVANIA BETWEEN 530 PM AND 630 PM. ADDITIONAL RAINFALL OF OVER AN INCH IS LIKELY FROM THIS ACTIVITY. PRECAUTIONARY/PREPAREDNESS ACTIONS... DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. MOVE TO HIGHER GROUND. && LAT...LON 4208 7921 4205 7899 4200 7897 4200 7921 $$ TMA
2 follow-up statements
695 WGUS71 KBUF 092242 FFSBUF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE BUFFALO NY 642 PM EDT FRI SEP 9 2011 NYC009-013-100015- /O.CON.KBUF.FF.W.0021.000000T0000Z-110910T0015Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CATTARAUGUS NY-CHAUTAUQUA NY- 642 PM EDT FRI SEP 9 2011 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 815 PM EDT FOR SOUTHEASTERN CHAUTAUQUA AND SOUTHWESTERN CATTARAUGUS COUNTIES... AT 633 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT UP TO TWO AND A HALF INCHES OF RAIN HAS FALLEN ACROSS SOUTHEASTERN CHAUTAUQUA COUNTY IN THE VICINITY OF FREWSBURG SINCE 330 PM. ALTHOUGH THE HEAVIEST RAIN HAS DIMINISHING CONSIDERABLY... CREEKS AND STREAMS MAY RISE RAPIDLY. LAW ENFORCEMENT HAS INDICATED FREW RUN ROAD AT BAIN ROAD HAS BEEN CLOSED DUE TO HIGH WATER IN THE TOWN OF FREWSBURG. LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO FREWSBURG. PRECAUTIONARY/PREPAREDNESS ACTIONS... EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE BANKS OF CREEKS AND STREAMS. && LAT...LON 4208 7921 4205 7899 4200 7897 4200 7921 $$ TMA
662 WGUS71 KBUF 100014 FFSBUF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE BUFFALO NY 814 PM EDT FRI SEP 9 2011 NYC009-013-100022- /O.EXP.KBUF.FF.W.0021.000000T0000Z-110910T0015Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CATTARAUGUS NY-CHAUTAUQUA NY- 814 PM EDT FRI SEP 9 2011 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 815 PM EDT FOR SOUTHEASTERN CHAUTAUQUA AND SOUTHWESTERN CATTARAUGUS COUNTIES... AT 811 PM EDT...NATIONAL WEATHER SERVICE RADAR SHOWED THE RAIN DISSIPATING. THE FLOODING HAS RECEDED...THUS THE FLOOD WARNING HAS BEEN ALLOWED TO EXPIRE. LAT...LON 4208 7921 4205 7899 4200 7897 4200 7921 $$ TMA
The office that day
Everything else NWS Buffalo, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 9, 6:38 AM EDT | Dense Fog Advisory | BUF | Cayuga, Jefferson, Lewis, Oswego | 4 hr |
| Sep 9, 4:21 PM EDT | Areal Flood Advisory | BUF | Chautauqua | 3 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.