Alert archive / New York / Flash Flood Warnings in 2011
Flash Flood Warning 1, NWS Buffalo, NY
NWS Buffalo, NY issued this flash flood warning at Apr 26, 2011, 5:27 PM EDT for Allegany County, New York. It was in force for 5 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
- Apr 26, 2011, 5:27 PM EDT (21:27 UTC)
- Expired
- Apr 26, 2011, 10:52 PM EDT
- In force
- 5 hr
- Issued by
- NWS Buffalo, NY
- Area
- Storm-based polygon
- Flood severity
- None
County Allegany County, NY
The radar
The Buffalo radar (KBUF), 113 km from the middle of the area, began a volume at 21:30 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 |
|---|---|---|---|
| Apr 26, 6:30 PM EDT | FLASH FLOOD | Wellsville, NY | FLOODING 2-3 FEET OF WATER IN THE STREETS OF WELLSVILLE... NY. |
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, 9.5 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 493 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- 128 m²/s²
- 0-3 km storm-relative helicity
- 237 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
934
WGUS51 KBUF 262127
FFWBUF
NYC003-270130-
/O.NEW.KBUF.FF.W.0001.110426T2127Z-110427T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
527 PM EDT TUE APR 26 2011
THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTHEASTERN ALLEGANY COUNTY IN WESTERN NEW YORK...
THIS INCLUDES THE CITY OF WELLSVILLE...
* UNTIL 930 PM EDT
* AT 521 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
FLASH FLOODING FROM A THUNDERSTORM OVER THE WARNED AREA. ADDTIONAL
STORMS MAY MOVE INTO THE AREA THROUGH 630 PM.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
ADDITIONAL RAINFALL AMOUNTS OF AN INCH ARE POSSIBLE IN THE WARNED
AREA. WITH RECENT RAINFALL...ANY RAIN THAT DOES FALL WILL RUN OFF
QUICKLY...AND MAY CAUSE WASHOUTS.
DO NOT DRIVE THROUGH FLOODED ROADWAYS...AS THE WATER MAY BE DEEPER
THAN YOU THINK.
&&
LAT...LON 4200 7820 4220 7800 4236 7773 4225 7772
4223 7774 4200 7774 4199 7802
$$
APFFEL3 follow-up statements
769
WGUS71 KBUF 262235
FFSBUF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
635 PM EDT TUE APR 26 2011
NYC003-270130-
/O.CON.KBUF.FF.W.0001.000000T0000Z-110427T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ALLEGANY NY-
635 PM EDT TUE APR 26 2011
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 930 PM EDT FOR
SOUTHEASTERN ALLEGANY COUNTY...
AT 629 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
ANOTHER THUNDERSTORM CROSSING THE WARNED AREA. THIS STORM MAY BRING
AN ADDITIONAL RAIN BETWEEN 630 PM AND 700 PM...WITH STORM TOTALS UP
TO 3 INCHES.
SOME FLOODING HAS ALREADY OCCURRED IN AND NEAR WELLSVILLE. WITH
ADDITIONAL RAINFALL...EXPECT CREEKS TO CONTINUE TO RISE RAPIDLY IN
SPOTS. SOME ADDITIONAL FLOODING AND ROAD WASHOUTS ARE LIKELY IN
EASTERN ALLEGANY COUNTY...INCLUDING THE CITY OF WELLSVILLE. CREEKS
MAY CONTINUE TO RISE EVEN AFTER THE HEAVIEST RAIN HAS FALLEN.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.
&&
LAT...LON 4200 7820 4220 7800 4236 7773 4225 7772
4223 7774 4200 7774 4199 7802
$$
APFFEL607
WGUS51 KBUF 270057
FFWBUF
NYC003-270400-
/O.EXT.KBUF.FF.W.0001.000000T0000Z-110427T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
857 PM EDT TUE APR 26 2011
THE NATIONAL WEATHER SERVICE IN BUFFALO HAS EXTENDED THE
* FLASH FLOOD WARNING FOR...
SOUTHEASTERN ALLEGANY COUNTY IN WESTERN NEW YORK...
THIS INCLUDES THE CITY OF WELLSVILLE...
* UNTIL MIDNIGHT EDT
* AT 849 PM EDT...NUMEROUS REPORTS OF FLOODING IN AND AROUND THE
CITY OF WELLSVILLE HAVE BEEN RECEIVED. WHILE THE MAJORITY OF THE
RAINFALL HAS ENDED...SOME OF THE SLOWER RESPONDING CREEKS MAY
CONTINUE TO RISE THROUGH THIS EVENING. FLOODING HAS ALSO DAMAGED
SOME AREA ROADS IN BOTH WELLSVILLE AND NEARBY RURAL LOCATIONS IN
ALLEGANY COUNTY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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 4200 7820 4220 7800 4236 7773 4225 7772
4223 7774 4200 7774 4199 7802
$$
APFFEL070
WGUS71 KBUF 270252
FFSBUF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
1052 PM EDT TUE APR 26 2011
NYC003-270301-
/O.CAN.KBUF.FF.W.0001.000000T0000Z-110427T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ALLEGANY NY-
1052 PM EDT TUE APR 26 2011
...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR SOUTHEASTERN
ALLEGANY COUNTY...
LAW ENFORCEMENT HAS INDICATED THAT THE FLOODING HAS
RECEDED...THEREFORE THE FLOOD WARNING HAS BEEN CANCELLED.
LAT...LON 4200 7820 4220 7800 4236 7773 4225 7772
4223 7774 4200 7774 4199 7802
$$
JJRThe office that day
Everything else NWS Buffalo, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 25, 8:36 PM EDT | Areal Flood Advisory | BUF | Chautauqua, Erie, Genesee | 6 hr |
| Apr 26, 3:07 AM EDT | River Flood Warning | BUF | Erie, Wyoming | 3 hr |
| Apr 26, 3:07 AM EDT | River Flood Warning | BUF | Erie | 3 hr |
| Apr 26, 3:41 AM EDT | Small Craft Advisory | BUF | 18 hr | |
| Apr 26, 12:59 PM EDT | Special Weather Statement | BUF | Allegany | 31 min |
| Apr 26, 2:00 PM EDT | Severe Thunderstorm Warning | BUF | Ontario | 45 min |
| Apr 26, 2:26 PM EDT | Severe Thunderstorm Warning | BUF | Cayuga, Ontario, Oswego, Wayne | 49 min |
| Apr 26, 3:53 PM EDT | Special Weather Statement | BUF | Oswego | 52 min |
| Apr 26, 4:43 PM EDT | Severe Thunderstorm Warning | BUF | Genesee, Monroe, Orleans | 47 min |
| Apr 26, 4:44 PM EDT | Severe Thunderstorm Warning | BUF | Monroe | 46 min |
| Apr 26, 4:50 PM EDT | Severe Thunderstorm Warning | BUF | Cayuga, Oswego | 55 min |
| Apr 26, 4:53 PM EDT | Special Marine Warning | BUF | 58 min | |
| Apr 26, 5:05 PM EDT | Severe Thunderstorm Warning | BUF | Lewis, Oswego | 40 min |
| Apr 26, 5:40 PM EDT | Severe Thunderstorm Warning | BUF | Cayuga, Ontario, Wayne | 50 min |
| Apr 26, 5:46 PM EDT | Special Weather Statement | BUF | Lewis | 59 min |
| Apr 26, 5:49 PM EDT | Special Marine Warning | BUF | 86 min | |
| Apr 26, 6:14 PM EDT | Special Weather Statement | BUF | Allegany | 61 min |
| Apr 26, 6:19 PM EDT | Areal Flood Advisory | BUF | Ontario, Wayne | 2 hr |
| Apr 26, 6:22 PM EDT | Severe Thunderstorm Warning | BUF | Allegany | 38 min |
| Apr 26, 7:10 PM EDT | Flash Flood Warning | BUF | Ontario, Wayne | 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.