Alert archive / New York / Flash Flood Warnings in 2009
Flash Flood Warning 11, NWS Buffalo, NY
NWS Buffalo, NY issued this flash flood warning at Aug 5, 2009, 12:33 AM EDT for Erie County, New York. It was in force for 2 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 5, 2009, 12:33 AM EDT (04:33 UTC)
- Expired
- Aug 5, 2009, 2:40 AM EDT
- In force
- 2 hr
- Issued by
- NWS Buffalo, NY
- Area
- Storm-based polygon
- Flood severity
- None
County Erie County, NY
The radar
The Buffalo radar (KBUF), 37 km from the middle of the area, began a volume at 04:36 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 5, 12:55 AM EDT | FLASH FLOOD | Boston, NY | BACK CREEK ROAD WASHED OUT. WILL BE CLOSED 5-7 DAYS. |
| Aug 5, 1:30 AM EDT | FLASH FLOOD | Eden, NY | WIDESPREAD FLOODING OF ROADS AND BASEMENTS. |
| Aug 5, 1:58 AM EDT | FLASH FLOOD | Eden, NY | SCHNITZIUS ROAD WASHED OUT. WILL BE CLOSED 5-7 DAYS. |
| Aug 5, 2:00 AM EDT | FLASH FLOOD | Evans Center, NY | WIDESPREAD FLOODING OF ROADS AND BASEMENTS. |
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, 4.6 hours before the alert went out and 37 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
- 1480 J/kg
- Mixed-layer CIN
- -15 J/kg
- Mixed-layer LCL
- 735 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 104 m²/s²
- 0-3 km storm-relative helicity
- 202 m²/s²
- Significant tornado parameter
- 0.9
- Supercell composite
- 4.8
The text
As transmitted, in the capitals the NWS used until 2016.
000
WGUS51 KBUF 050433
FFWBUF
NYC029-050730-
/O.NEW.KBUF.FF.W.0011.090805T0433Z-090805T0730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
1233 AM EDT WED AUG 5 2009
THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTHERN ERIE COUNTY IN WESTERN NEW YORK...
THIS INCLUDES THE CITIES OF EDEN...DERBY...NORTH COLLINS AND ANGOLA...
* UNTIL 330 AM EDT
* AT 1227 AM EDT...VERY HEAVY RAINS FROM SLOW MOVING THUNDERSTORMS
CONTINUE OVER EVANS...COLLINS AND DERBY. RADAR INDICATES THAT OVER
TWO INCHES OF RAIN HAS FALLEN IN JUST OVER AN HOUR. THE RAIN
SHOULD TAPER OFF AFTER 1 AM...BUT FLOODING OF STREAMS AND CREEKS
SUCH AS EIGHTEENMILE CREEK MAY OCCUR DUE TO RAPID RUNOFF.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...SUCH AS EIGHTEENMILE CREEK...AS WELL AS
FARMLAND ALONG THE BANKS OF CREEKS AND STREAMS. FLOODING AT NIGHT IS
ALWAYS DANGEROUS...ESPECIALLY IN RURAL HILLY AREAS.
&&
LAT...LON 4263 7911 4267 7907 4270 7906 4274 7896
4276 7864 4256 7873 4260 7913
$$
SFM2 follow-up statements
000
WGUS71 KBUF 050532
FFSBUF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
132 AM EDT WED AUG 5 2009
NYC029-050730-
/O.CON.KBUF.FF.W.0011.000000T0000Z-090805T0730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ERIE NY-
132 AM EDT WED AUG 5 2009
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 330 AM EDT FOR
SOUTHERN ERIE COUNTY...
AT 129 AM EDT...THE SHOWERS AND THUNDERSTORMS WHICH DROPPED OVER TWO
INCHES OF RAIN IN AN HOUR FROM MIDNIGHT TO 1 AM HAVE MOVED SOUTH AND
EAST OF THE AREA. THERE HAVE BEEN REPORTS OF FLOODING THOUGH...AND
EXCESSIVE RUNOFF WILL CONTINUE FOR AWHILE LONGER...ESPECIALLY AS
MUCH OF THIS AREA HAS VERY HILLY TERRAIN...SO THE WARNING WILL
CONTINUE.
LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
DERBY...BOSTON...EVANS AND EDEN.
LAT...LON 4263 7911 4267 7907 4270 7906 4274 7896
4276 7864 4256 7873 4260 7913
$$
SFM000
WGUS71 KBUF 050640
FFSBUF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
240 AM EDT WED AUG 5 2009
NYC029-050649-
/O.CAN.KBUF.FF.W.0011.000000T0000Z-090805T0730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ERIE NY-
240 AM EDT WED AUG 5 2009
...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR SOUTHERN ERIE
COUNTY...
RUNOFF FROM THE TWO TO THREE INCHES OF RAIN THAT FELL IN
THUNDERSTORMS BETWEEN MIDNIGHT AND 130 AM HAS RECEDED. NO FURTHER
FLOODING IS EXPECTED...THUS THE FLOOD WARNING HAS BEEN CANCELLED.
LAT...LON 4263 7911 4267 7907 4270 7906 4274 7896
4276 7864 4256 7873 4260 7913
$$
SFMThe office that day
Everything else NWS Buffalo, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 4, 11:10 PM EDT | Special Marine Warning | BUF | 65 min | |
| Aug 5, 12:11 AM EDT | Areal Flood Advisory | BUF | Erie | 3 hr |
| Aug 5, 9:34 AM EDT | Small Craft Advisory | BUF | 12 hr |
Nearby
Flash Flood Warnings in New York, 2009Every flash flood warning in 2009
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.