Alert archive / New York / Flash Flood Warnings in 2011
Flash Flood Warning 23, NWS Buffalo, NY
NWS Buffalo, NY issued this flash flood warning at Sep 11, 2011, 1:34 PM EDT for Livingston County, Wyoming 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 11, 2011, 1:34 PM EDT (17:34 UTC)
- Expired
- Sep 11, 2011, 4:30 PM EDT
- In force
- 3 hr
- Issued by
- NWS Buffalo, NY
- Area
- Storm-based polygon
- Flood severity
- None
Counties Livingston County, NY, Wyoming County, NY
The radar
The Buffalo radar (KBUF), 61 km from the middle of the area, began a volume at 17:36 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, 5.6 hours before the alert went out and 57 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
- 1397 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- 9 m²/s²
- 0-3 km storm-relative helicity
- 19 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
504
WGUS51 KBUF 111734
FFWBUF
NYC051-121-112030-
/O.NEW.KBUF.FF.W.0023.110911T1734Z-110911T2030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
134 PM EDT SUN SEP 11 2011
THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A
* FLASH FLOOD WARNING FOR...
WEST CENTRAL LIVINGSTON COUNTY IN WESTERN NEW YORK...
NORTHEASTERN WYOMING COUNTY IN WESTERN NEW YORK...
* UNTIL 430 PM EDT
* AT 131 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
FLASH FLOODING FROM A THUNDERSTORM OVER THE WARNED AREA. TOTAL
RAINFALL AMOUNTS IN EXCESS OF TWO INCHES ARE LIKELY...ESPECIALLY
IN THE VICINITY OF WYOMING AND WARSAW.
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 4271 7814 4286 7813 4287 7807 4286 7807
4286 7796 4289 7796 4291 7784 4278 7788
4271 7797
$$
APFFEL2 follow-up statements
935
WGUS71 KBUF 111842
FFSBUF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
242 PM EDT SUN SEP 11 2011
NYC051-121-112030-
/O.CON.KBUF.FF.W.0023.000000T0000Z-110911T2030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LIVINGSTON NY-WYOMING NY-
242 PM EDT SUN SEP 11 2011
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 430 PM EDT FOR
NORTHEASTERN WYOMING AND WEST CENTRAL LIVINGSTON COUNTIES...
AT 236 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A THUNDERSTORM PRODUCING FLASH FLOODING OVER THE WARNED
AREA. RADAR ESTIMATES AROUND TWO INCHES OF RAIN HAS FALLEN NEAR AND
JUST EAST OF THE TOWN OF WYOMING. IN ADDITION...THERE IS ANOTHER
THUNDERSTORM HEADING TOWARD THE WARNED AREA...WITH AN ADDITIONAL
INCH OR MORE OF RAINFALL POSSIBLE.
THIS IS LIKELY TO CAUSE CREEKS AND STREAMS TO RISE TO AND ABOVE BANK
FULL. STREAMS AND CREEKS MAY CONTINUE TO RISE EVEN AFTER THE
HEAVIEST RAIN HAS ENDED.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.
MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.
&&
LAT...LON 4271 7814 4286 7813 4287 7807 4286 7807
4286 7796 4288 7796 4288 7787 4278 7788
4271 7797
$$
APFFEL010
WGUS71 KBUF 112033
FFSBUF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
433 PM EDT SUN SEP 11 2011
NYC051-121-112042-
/O.EXP.KBUF.FF.W.0023.000000T0000Z-110911T2030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LIVINGSTON NY-WYOMING NY-
433 PM EDT SUN SEP 11 2011
...THE FLASH FLOOD WARNING HAS EXPIRED FOR NORTHEASTERN WYOMING AND
WEST CENTRAL LIVINGSTON COUNTIES...
AT 432 PM EDT...NATIONAL WEATHER SERVICE RADAR SHOWED THAT THE
THUNDERSTORMS THAT PROMPTED THE WARNING HAD EXITED THE AREA...THUS
THE FLOOD WARNING HAS BEEN ALLOWED TO EXPIRE.
PONDING OF LOW LYING AND POOR DRAINAGE AREAS WILL BE POSSIBLE FOR
AWHILE UNTIL THE WATER HAS TIME TO RUN OFF.
LAT...LON 4271 7814 4286 7813 4287 7807 4286 7807
4286 7796 4288 7796 4288 7787 4278 7788
4271 7797
$$
TMAThe office that day
Everything else NWS Buffalo, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 11, 12:34 PM EDT | Special Weather Statement | BUF | Erie | 56 min |
| Sep 11, 12:40 PM EDT | Flash Flood Warning | BUF | Cattaraugus, Chautauqua, Erie | 3 hr |
| Sep 11, 12:43 PM EDT | Special Weather Statement | BUF | Genesee | 62 min |
| Sep 11, 12:46 PM EDT | Severe Thunderstorm Warning | BUF | Genesee, Livingston, Monroe, Wyoming | 44 min |
| Sep 11, 1:33 PM EDT | Severe Thunderstorm Warning | BUF | Livingston, Wyoming | 42 min |
| Sep 11, 1:55 PM EDT | Severe Thunderstorm Warning | BUF | Ontario | 50 min |
| Sep 11, 2:04 PM EDT | Severe Thunderstorm Warning | BUF | Genesee, Wyoming | 41 min |
| Sep 11, 2:17 PM EDT | Severe Thunderstorm Warning | BUF | Genesee, Livingston, Ontario, Wyoming | 43 min |
| Sep 11, 2:46 PM EDT | Severe Thunderstorm Warning | BUF | Livingston, Monroe, Ontario | 44 min |
| Sep 11, 4:31 PM EDT | Special Weather Statement | BUF | Chautauqua | 59 min |
| Sep 11, 5:01 PM EDT | Special Weather Statement | BUF | Erie | 59 min |
| Sep 11, 5:21 PM EDT | Areal Flood Advisory | BUF | Niagara | 114 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.