Alert archive / New York / Flash Flood Warnings in 2009
Flash Flood Warning 12, NWS Buffalo, NY
NWS Buffalo, NY issued this flash flood warning at Aug 9, 2009, 2:18 PM EDT for Allegany County, Cattaraugus County, Chautauqua County, New York. It was in force for 84 min. 3 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 9, 2009, 2:18 PM EDT (18:18 UTC)
- Expired
- Aug 9, 2009, 3:42 PM EDT
- In force
- 84 min
- Issued by
- NWS Buffalo, NY
- Area
- Storm-based polygon
- Flood severity
- None
Counties Allegany County, NY, Cattaraugus County, NY, Chautauqua County, NY
The radar
The Buffalo radar (KBUF), 89 km from the middle of the area, began a volume at 18:19 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 9, 2:30 PM EDT | FLASH FLOOD | Jamestown, NY | MCDANIEL ROAD WASHED OUT. |
| Aug 9, 2:35 PM EDT | FLASH FLOOD | Jamestown, NY | SMALL CREEKS OVERFLOWING AND FLOODING MALL PARKING LOTS |
| Aug 9, 3:00 PM EDT | FLASH FLOOD | Jamestown, NY | WIDESPREAD FLOODING AND ROAD CLOSURES IN JAMESTOWN AND LAKEWOOD AREAS |
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, 6.3 hours before the alert went out and 88 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
- 913 J/kg
- Mixed-layer CIN
- -30 J/kg
- Mixed-layer LCL
- 495 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 180 m²/s²
- 0-3 km storm-relative helicity
- 190 m²/s²
- Significant tornado parameter
- 0.7
- Supercell composite
- 5.7
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS51 KBUF 091818 FFWBUF NYC003-009-013-092115- /O.NEW.KBUF.FF.W.0012.090809T1818Z-090809T2115Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE BUFFALO NY 218 PM EDT SUN AUG 9 2009 THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A * FLASH FLOOD WARNING FOR... ALLEGANY COUNTY IN WESTERN NEW YORK... THIS INCLUDES THE CITY OF WELLSVILLE... CATTARAUGUS COUNTY IN WESTERN NEW YORK... THIS INCLUDES THE CITIES OF...SALAMANCA...OLEAN... CHAUTAUQUA COUNTY IN WESTERN NEW YORK... THIS INCLUDES THE CITY OF JAMESTOWN... * UNTIL 515 PM EDT * AT 216 PM EDT...HEAVY THUNDERSTORMS WILL CONTINUE TO MOVE ACROSS THE REGION THROUGH 4 PM. ONE TO TWO INCHES OF RAIN WILL FALL WITHIN AN HOURS TIME. THIS WILL RESULT IN WIDESPREAD FLOODING. 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 4200 7977 4234 7962 4247 7771 4199 7775 $$ SFM
1 follow-up statement
000 WGUS71 KBUF 091942 FFSBUF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE BUFFALO NY 342 PM EDT SUN AUG 9 2009 NYC003-009-013-091952- /O.CAN.KBUF.FF.W.0012.000000T0000Z-090809T2115Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CHAUTAUQUA NY-CATTARAUGUS NY-ALLEGANY NY- 342 PM EDT SUN AUG 9 2009 ...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR ALLEGANY... CATTARAUGUS AND CHAUTAUQUA COUNTIES... AT 342 PM EDT NATIONAL WEATHER SERVICE RADAR SHOWED THAT THE THUNDERSTORM THAT PROMPTED THE WARNING HAD EXITED THE AREA...THUS THE FLOOD WARNING HAS BEEN CANCELLED. PONDING AND POOR DRAINAGE FLOODING WILL LIKELY CONTINUE FOR ANOTHER HOUR OR SO BUT THE WORST IS OVER. LAT...LON 4200 7977 4234 7962 4247 7771 4199 7775 $$ SAGE
The office that day
Everything else NWS Buffalo, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 10:05 AM EDT | Small Craft Advisory | BUF | 5 hr | |
| Aug 9, 11:56 AM EDT | Special Marine Warning | BUF | 42 min | |
| Aug 9, 12:07 PM EDT | Severe Thunderstorm Warning | BUF | Erie, Genesee, Niagara, Orleans | 53 min |
| Aug 9, 12:46 PM EDT | Special Marine Warning | BUF | 59 min | |
| Aug 9, 12:51 PM EDT | Severe Thunderstorm Warning | BUF | Cattaraugus, Erie, Genesee, Livingston, Monroe, Wyoming | 54 min |
| Aug 9, 1:35 PM EDT | Severe Thunderstorm Warning | BUF | Allegany, Cattaraugus, Chautauqua, Erie, Genesee, Livingston and 3 more | 55 min |
| Aug 9, 1:42 PM EDT | Special Marine Warning | BUF | 33 min | |
| Aug 9, 1:57 PM EDT | Severe Thunderstorm Warning | BUF | Allegany, Cattaraugus, Chautauqua, Livingston | 63 min |
| Aug 9, 2:07 PM EDT | Tornado Warning | BUF | Allegany, Cattaraugus | 39 min |
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.