Alert archive / New York / Flash Flood Warnings in 2011
Flash Flood Warning 18, NWS Buffalo, NY
NWS Buffalo, NY issued this flash flood warning at Aug 14, 2011, 2:40 PM EDT for 4 counties in New York. It was in force for 5 hr. 4 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
- Aug 14, 2011, 2:40 PM EDT (18:40 UTC)
- Expired
- Aug 14, 2011, 7:37 PM EDT
- In force
- 5 hr
- Issued by
- NWS Buffalo, NY
- Area
- Storm-based polygon
- Flood severity
- None
Counties Livingston County, NY, Monroe County, NY, Ontario County, NY, Wayne County, NY
The radar
The Buffalo radar (KBUF), 100 km from the middle of the area, began a volume at 18:41 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 |
|---|---|---|---|
| Aug 14, 3:51 PM EDT | FLASH FLOOD | 1 Wnw Cobbs Hill, NY | ROUTE 490 EAST AND WEST CLOSED AT CULVER ROAD |
| Aug 14, 4:10 PM EDT | FLASH FLOOD | Rochester, NY | FLOODING ON INTERSTATE 590 AND MONROE AVE. SEVERAL CARS SUBMERGED AT UNIVERSITY AVE AND WINTON ROAD. |
| Aug 14, 4:15 PM EDT | FLASH FLOOD | Irondequoit, NY | NUMEROUS ROADS CLOSED |
| Aug 14, 4:15 PM EDT | FLASH FLOOD | Webster, NY | NUMEROUS ROADS CLOSED |
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, 6.7 hours before the alert went out and 97 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
- 7058 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 60 m²/s²
- 0-3 km storm-relative helicity
- 104 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
434
WGUS51 KBUF 141840
FFWBUF
NYC051-055-069-117-142115-
/O.NEW.KBUF.FF.W.0018.110814T1840Z-110814T2115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
240 PM EDT SUN AUG 14 2011
THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A
* FLASH FLOOD WARNING FOR...
NORTHEASTERN LIVINGSTON COUNTY IN WESTERN NEW YORK...
EASTERN MONROE COUNTY IN WESTERN NEW YORK...
THIS INCLUDES THE CITIES OF...WEBSTER...ROCHESTER...IRONDEQUOIT...
GREECE...GATES-NORTH GATES...GATES...FAIRPORT...EAST ROCHESTER...
BRIGHTON...
NORTHWESTERN ONTARIO COUNTY IN WESTERN NEW YORK...
WESTERN WAYNE COUNTY IN WESTERN NEW YORK...
* UNTIL 515 PM EDT
* AT 236 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS WITH VERY HEAVY RAIN CONSOLIDATING ACROSS THE
ROCHESTER METRO AREA. UP TO 3 INCHES OF RAIN IS POSSIBLE WITH
THESE STORMS. WIDESPREAD URBAN FLOODING IS POSSIBLE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.
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 4293 7778 4322 7784 4326 7758 4324 7754
4328 7743 4329 7735 4329 7732 4289 7725
$$
SFM4 follow-up statements
587
WGUS71 KBUF 141938
FFSBUF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
338 PM EDT SUN AUG 14 2011
NYC051-055-069-117-142115-
/O.CON.KBUF.FF.W.0018.000000T0000Z-110814T2115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LIVINGSTON NY-ONTARIO NY-WAYNE NY-MONROE NY-
338 PM EDT SUN AUG 14 2011
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 515 PM EDT FOR
EASTERN MONROE...WESTERN WAYNE...NORTHWESTERN ONTARIO AND
NORTHEASTERN LIVINGSTON COUNTIES...
AT 332 PM EDT...THUNDERSTORMS WITH TORRENTIAL DOWNPOURS CONTINUE TO
MOVE NORTHWEST ACROSS THE ROCHESTER METRO AREA...WITH THE HEAVIEST
ACTIVITY NOW CLOSER TO THE LAKE FROM GREECE TO IRONDEQUOIT. RADAR
AND SURFACE REPORTS INDICATE THAT ONE TO TWO INCHES HAS FALLEN IN
LESS THAN AN HOUR WITH WIDESPREAD FLOODING THROUGHOUT THE AREA. MORE
STORMS WILL CROSS THE AREA THROUGH 430 PM WITH UP TO AN OTHER INCH.
LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO THE CITY OF
ROCHESTER...AND ITS SUBURBS OF WEBSTER...SPENCERPORT...IRONDEQUOIT
AND GREECE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.
&&
LAT...LON 4293 7778 4322 7784 4326 7758 4324 7754
4328 7743 4329 7735 4329 7732 4289 7725
$$
SFM167
WGUS51 KBUF 142112
FFWBUF
NYC051-055-069-117-150015-
/O.EXT.KBUF.FF.W.0018.000000T0000Z-110815T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
512 PM EDT SUN AUG 14 2011
THE NATIONAL WEATHER SERVICE IN BUFFALO HAS EXTENDED THE
* FLASH FLOOD WARNING FOR...
NORTHEASTERN LIVINGSTON COUNTY IN WESTERN NEW YORK...
MONROE COUNTY IN WESTERN NEW YORK...
NORTHWESTERN ONTARIO COUNTY IN WESTERN NEW YORK...
WESTERN WAYNE COUNTY IN WESTERN NEW YORK...
* UNTIL 815 PM EDT
* AT 504 PM EDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED ONGOING
FLASH FLOODING FROM WIDESPREAD HEAVY RAINFALL ACROSS THE GREATER
ROCHESTER AREA. DOPPLER RADAR ESTIMATES THAT 3 TO 4 INCHES OF RAIN
HAS FALLEN IN SOME PORTIONS OF THE AREA. RAINFALL IS BEGINNING TO
DIMINISH IN INTENSITY...WITH ADDITIONAL AMOUNTS OF UP TO A HALF INCH
POSSIBLE.
EVEN THOUGH THE RAIN IS DIMINISHING...EXCESSIVE RUNOFF FROM EARLIER
HEAVY RAIN WILL CONTINUE TO RESULT IN WIDESPREAD ROAD FLOODING...
ESPECIALLY IN THE ROCHESTER METRO AREA. LOCAL LAW ENFORCEMENT
REPORTS WIDESPREAD ROAD FLOODING IN ROCHESTER...INCLUDING MAJOR
ROADS SUCH AS INTERSTATE 490 AND 590.
SMALL STREAMS WILL ALSO EXPERIENCE SIGNIFICANT AND RAPID RISES...
INCLUDING IRONDEQUOIT CREEK AND ALLEN CREEK.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS. NEVER ALLOW
CHILDREN TO PLAY IN OR NEAR FLOOD WATERS.
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. REMEMBER...TURN AROUND DONT DROWN!
&&
LAT...LON 4293 7778 4322 7784 4326 7758 4324 7754
4328 7743 4329 7735 4329 7732 4289 7725
$$
HITCHCOCK839
WGUS71 KBUF 142249
FFSBUF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
649 PM EDT SUN AUG 14 2011
NYC051-055-069-117-150015-
/O.CON.KBUF.FF.W.0018.000000T0000Z-110815T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LIVINGSTON NY-ONTARIO NY-WAYNE NY-MONROE NY-
649 PM EDT SUN AUG 14 2011
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 815 PM EDT FOR
MONROE...WESTERN WAYNE...NORTHWESTERN ONTARIO AND NORTHEASTERN
LIVINGSTON COUNTIES...
AT 645 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THAT RAIN HAS ENDED ACROSS MOST OF THE AREA. EVEN THOUGH THE RAIN IS
OVER...EXCESSIVE RUNOFF FROM HEAVY RAIN EARLIER TODAY WILL CONTINUE
TO PRODUCE FLOODING THROUGH THE EARLY EVENING HOURS. NUMEROUS ROADS
ARE FLOODED...ESPECIALLY VIADUCTS AND LOW LYING LOCATIONS.
SMALL STREAMS WILL ALSO RUN VERY HIGH AND FAST THROUGH THIS
EVENING...INCLUDING IRONDEQUOIT CREEK AND ALLEN CREEK. NEVER ALLOW
CHILDREN TO PLAY IN OR NEAR FLOOD WATERS.
LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
WEBSTER...SPENCERPORT...IRONDEQUOIT...ROCHESTER AND GREECE
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.
MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.
&&
LAT...LON 4293 7778 4322 7784 4326 7758 4324 7754
4328 7743 4329 7735 4329 7732 4289 7725
$$
HITCHCOCK589
WGUS71 KBUF 142337
FFSBUF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
737 PM EDT SUN AUG 14 2011
NYC051-055-069-117-142347-
/O.CAN.KBUF.FF.W.0018.000000T0000Z-110815T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LIVINGSTON NY-ONTARIO NY-WAYNE NY-MONROE NY-
737 PM EDT SUN AUG 14 2011
...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR MONROE...WESTERN
WAYNE...NORTHWESTERN ONTARIO AND NORTHEASTERN LIVINGSTON COUNTIES...
LOCAL LAW ENFORCEMENT REPORTS THE FLOODING HAS RECEDED...THUS THE
FLOOD WARNING HAS BEEN CANCELLED.
LAT...LON 4293 7778 4322 7784 4326 7758 4324 7754
4328 7743 4329 7735 4329 7732 4289 7725
$$
HITCHCOCKThe office that day
Everything else NWS Buffalo, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 13, 8:10 PM EDT | Severe Thunderstorm Warning | BUF | Wayne | 65 min |
| Aug 13, 8:35 PM EDT | Severe Thunderstorm Warning | BUF | Ontario, Wayne | 55 min |
| Aug 13, 9:16 PM EDT | Special Weather Statement | BUF | Ontario | 59 min |
| Aug 13, 9:56 PM EDT | Flash Flood Warning | BUF | Ontario | 3 hr |
| Aug 13, 11:06 PM EDT | Areal Flood Advisory | BUF | Livingston | 118 min |
| Aug 13, 11:43 PM EDT | Flash Flood Warning | BUF | Livingston | 75 min |
| Aug 14, 9:00 AM EDT | Special Weather Statement | BUF | Erie | 60 min |
| Aug 14, 9:28 AM EDT | Special Weather Statement | BUF | Erie | 47 min |
| Aug 14, 10:12 AM EDT | Areal Flood Advisory | BUF | Allegany, Cattaraugus, Erie, Wyoming | 3 hr |
| Aug 14, 10:12 AM EDT | Special Weather Statement | BUF | Erie, Wyoming | 48 min |
| Aug 14, 10:59 AM EDT | Flash Flood Warning | BUF | Allegany, Cattaraugus, Livingston, Wyoming | 3 hr |
| Aug 14, 11:10 AM EDT | Special Weather Statement | BUF | Erie | 50 min |
| Aug 14, 1:54 PM EDT | Flash Flood Warning | BUF | Livingston, Ontario | 3 hr |
| Aug 14, 2:33 PM EDT | Special Weather Statement | BUF | Monroe | 57 min |
| Aug 14, 5:53 PM EDT | Areal Flood Advisory | BUF | Jefferson, Lewis, Oswego | 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.