Alert archive / New York / Flash Flood Warnings in 2015
Flash Flood Warning 4, NWS Buffalo, NY
NWS Buffalo, NY issued this flash flood warning at May 18, 2015, 8:40 PM EDT for Allegany County, Livingston County, Ontario County, New York. It was in force for 3 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
- May 18, 2015, 8:40 PM EDT (00:40 UTC)
- Expired
- May 18, 2015, 11:45 PM EDT
- In force
- 3 hr
- Issued by
- NWS Buffalo, NY
- Area
- Storm-based polygon
- Flood severity
- None
Counties Allegany County, NY, Livingston County, NY, Ontario County, NY
The radar
The Buffalo radar (KBUF), 98 km from the middle of the area, began a volume at 00:39 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 18, 9:11 PM EDT | FLASH FLOOD | 1 Nw Reed Corners, NY | RT 63 FLOODED AT PARKER HILL RD. |
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 00:00Z, 0.7 hours before the alert went out and 94 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
- 113 J/kg
- Mixed-layer CIN
- -83 J/kg
- Mixed-layer LCL
- 1013 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 55 m²/s²
- 0-3 km storm-relative helicity
- 20 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
310
WGUS51 KBUF 190040
FFWBUF
NYC003-051-069-190345-
/O.NEW.KBUF.FF.W.0004.150519T0040Z-150519T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
840 PM EDT MON MAY 18 2015
THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTHWESTERN ONTARIO COUNTY IN WESTERN NEW YORK...
SOUTHEASTERN LIVINGSTON COUNTY IN WESTERN NEW YORK...
NORTHEASTERN ALLEGANY COUNTY IN WESTERN NEW YORK...
* UNTIL 1145 PM EDT
* AT 839 PM EDT...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING
VERY HEAVY RAIN ACROSS THE WARNED AREA. DUAL POL DOPPLER RADAR
INDICATES THAT AN INCH AND A HALF OF RAIN HAS FALLEN IN THE WARNED
AREA THROUGH 8:30 PM EDT...WITH AN ADDITIONAL HALF TO ONE INCH OF
RAIN POSSIBLE. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.
&&
LAT...LON 4243 7793 4270 7793 4274 7734 4267 7737
4258 7737 4258 7766 4253 7766 4253 7772
4243 7773
$$
RSH3 follow-up statements
824
WGUS71 KBUF 190053
FFSBUF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
853 PM EDT MON MAY 18 2015
NYC003-051-069-190345-
/O.CON.KBUF.FF.W.0004.000000T0000Z-150519T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ONTARIO NY-LIVINGSTON NY-ALLEGANY NY-
853 PM EDT MON MAY 18 2015
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1145 PM EDT FOR
SOUTHWESTERN ONTARIO...SOUTHEASTERN LIVINGSTON AND NORTHEASTERN
ALLEGANY COUNTIES...
AT 851 PM EDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
HEAVY RAIN ACROSS THE WARNED AREA. DUAL POL DOPPLER RADAR INDICATES
THAT OVER AN INCH AND A HALF OF RAIN HAS ALREADY FALLEN OVER THIS
AREA...AND ANOTHER HALF TO ONE INCH OF RAIN IS EXPECTED. FLASH
FLOODING IS EXPECTED TO BEGIN SHORTLY.
SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
DANSVILLE...LETCHWORTH STATE PARK...NAPLES...GROVELAND...
SPRINGWATER...NUNDA...OSSIAN AND CANASERAGA.
THIS INCLUDES THE FOLLOWING STREAMS AND DRAINAGES...BRADNER CREEK...
STONY BROOK...ALLENS CREEK...HEMLOCK OUTLET...SLADER CREEK...FRY
CREEK...NEWVILLE CREEK...SPRINGWATER CREEK...BENNETT CREEK...TWO
MILE CREEK...CONESUS CREEK...BUCK RUN CREEK...MUD CREEK...CANASERAGA
CREEK...CANADICE OUTLET...HONEOYE CREEK...KESHEQUA CREEK...BLACK
CREEK...MILL CREEK... LITTLE MILL CREEK AND SUGAR CREEK.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.
&&
LAT...LON 4243 7793 4270 7793 4274 7734 4267 7737
4258 7737 4258 7766 4253 7766 4253 7772
4243 7773
$$
RSH785
WGUS71 KBUF 190204
FFSBUF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
1004 PM EDT MON MAY 18 2015
NYC003-051-069-190345-
/O.CON.KBUF.FF.W.0004.000000T0000Z-150519T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ONTARIO NY-LIVINGSTON NY-ALLEGANY NY-
1004 PM EDT MON MAY 18 2015
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1145 PM EDT FOR
SOUTHWESTERN ONTARIO...SOUTHEASTERN LIVINGSTON AND NORTHEASTERN
ALLEGANY COUNTIES...
AT 1000 PM EDT...DUAL POL DOPPLER RADAR INDICATED THAT THE LINE OF
THUNDERSTORMS AND SLOW MOVING DOWNPOURS HAVE PUSHED EAST AWAY FROM
THE AREA. WHILE THE STORMS HAVE MOVED AWAY...THERE WILL STILL BE
HIGH AND FAST RUNNING TRIBUTARIES IN THE AREA.
RADAR ESTIMATED THAT WIDESPREAD ONE TO ONE AND HALF INCH RAINFALL
AMOUNTS WERE FOUND OVER THE WARNED AREA...WITH SOME SPOTS PICKING UP
IN EXCESS OF TWO INCHES. ONE THE HARDER HIT AREAS INCLUDED CANASERGA
CREEK WHERE NEARLY TWO AND A HALF INCHES.
WATER LEVELS IN THE AREA SHOULD BEGIN TO RECEDE AT THIS TIME WITH NO
ADDITIONAL THUNDERSTORMS EXPECTED OVERNIGHT.
SOME LOCATIONS THAT COULD STILL EXPERIENCE FLOODING INCLUDE...
DANSVILLE...LETCHWORTH STATE PARK...NAPLES...GROVELAND...
SPRINGWATER...NUNDA...OSSIAN AND CANASERAGA.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.
&&
LAT...LON 4243 7793 4270 7793 4274 7734 4267 7737
4258 7737 4258 7766 4253 7766 4253 7772
4243 7773
$$
RSH511
WGUS71 KBUF 190337
FFSBUF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
1137 PM EDT MON MAY 18 2015
NYC003-051-069-190346-
/O.EXP.KBUF.FF.W.0004.000000T0000Z-150519T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ONTARIO NY-LIVINGSTON NY-ALLEGANY NY-
1137 PM EDT MON MAY 18 2015
...THE FLASH FLOOD WARNING FOR SOUTHWESTERN ONTARIO...SOUTHEASTERN
LIVINGSTON AND NORTHEASTERN ALLEGANY COUNTIES WILL EXPIRE AT 1145 PM
EDT...
FLOOD WATERS HAVE RECEDED...AND ARE NO LONGER EXPECTED TO POSE A
THREAT TO LIFE OR PROPERTY. PLEASE CONTINUE TO HEED ANY ROAD
CLOSURES.
LAT...LON 4243 7793 4270 7793 4274 7734 4267 7737
4258 7737 4258 7766 4253 7766 4253 7772
4243 7773
$$
RSHThe office that day
Everything else NWS Buffalo, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 18, 8:11 PM EDT | Severe Thunderstorm Warning | BUF | Allegany | 22 min |
| May 18, 8:27 PM EDT | Special Weather Statement | BUF | Livingston | 33 min |
| May 18, 9:03 PM EDT | Flash Flood Warning | BUF | Ontario | 3 hr |
Nearby
Flash Flood Warnings in New York, 2015Every flash flood warning in 2015
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.