Alert archive / Ohio / Flash Flood Warnings in 2009

Flash Flood Warning 13, NWS Wilmington, OH

June 26, 2009Clermont County, Hamilton County, Warren County, Ohio

NWS Wilmington, OH issued this flash flood warning at Jun 26, 2009, 2:37 AM EDT for Clermont County, Hamilton County, Warren County, Ohio. It was in force for 3 hr. 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
Jun 26, 2009, 2:37 AM EDT (06:37 UTC)
Expired
Jun 26, 2009, 5:30 AM EDT
In force
3 hr
Issued by
NWS Wilmington, OH
Area
Storm-based polygon
Flood severity
None

Counties Clermont County, OH, Hamilton County, OH, Warren County, OH

The radar

The Cincinnati radar (KILN), 36 km from the middle of the area, began a volume at 06:37 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

TimeReportWhereRemark
Jun 26, 2:41 AM EDTFLOODMason, OHSTREAMS OVER ROADS OR BRIDGES. EVENT OCCURRED BETWEEN 217 AM TO 232 AM
Jun 26, 3:10 AM EDTFLASH FLOOD1 Nw Mount Repose, OH5 FEET OF WATER FLOWING OVER COOK ROAD
Jun 26, 4:00 AM EDTFLASH FLOODMason, OHNUMEROUS ROADS WITH HIGH WATER RUNNING OVER THEM ACROSS THE SOUTHERN THIRD OF THE COUNTY. A COUPLE OF CARS BECAME STUCK IN THE HIGH WATER.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 00:00Z, 6.6 hours before the alert went out and 372 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.

Skew-T log-pSkew-T log-p diagram, Pittsburgh, PA at 00:00Z on 2009-06-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2793 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Pittsburgh, PA at 00:00Z on 2009-06-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 46 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
2793 J/kg
Mixed-layer CIN
-9 J/kg
Mixed-layer LCL
1178 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
46 m²/s²
0-3 km storm-relative helicity
45 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.6

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WGUS51 KILN 260637
FFWILN
OHC025-061-165-260930-
/O.NEW.KILN.FF.W.0013.090626T0637Z-090626T0930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE WILMINGTON OH
237 AM EDT FRI JUN 26 2009

THE NATIONAL WEATHER SERVICE IN WILMINGTON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN CLERMONT COUNTY IN SOUTHWEST OHIO...
  NORTHEASTERN HAMILTON COUNTY IN SOUTHWEST OHIO...
  SOUTHERN WARREN COUNTY IN SOUTHWEST OHIO...

* UNTIL 530 AM EDT.

* AT 236 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  THAT THUNDERSTORMS HAD PRODUCED HEAVY RAINFALL ACROSS THE WARNED   
AREA. RADAR ESTIMATED THAT BETWEEN TWO TO FOUR INCHES OF RAIN HAD 
FALLEN ACROSS SOUTHERN WARREN COUNTY AND PARTS OF NORTHEAST HAMILTON 
AND NORTHERN CLERMONT COUNTIES SINCE 1 AM. UP TO ANOTHER INCH OF 
RAIN WILL BE POSSIBLE THROUGH 4 AM. 

SOME LOCATIONS THAT MAY EXPERIENCE FLOODING INCLUDE...BLUE ASH...DEER
PARK...LOVELAND...MADEIRA...MASON...MILFORD...MONTGOMERY...NORWOOD...
READING...SHARONVILLE...MARIEMONT...MORROW AND TERRACE PARK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

HEAVY RAINS FLOOD ROADS AND LOW LYING AREAS RAPIDLY. DO NOT DRIVE
YOUR VEHICLE INTO WATER OF AN UNKNOWN DEPTH ON THE THE ROAD. IT ONLY
TAKES TWO FEET OF RUSHING WATER TO CARRY AWAY MOST SPORT UTILITY
VEHICLES AND PICKUPS. TAKE A DIFFERENT ROUTE TO REACH YOUR
DESTINATION OR WAIT UNTIL THE WATER RECEDES. REMEMBER...MOST FLOOD
RELATED DEATHS OCCUR IN AUTOMOBILES.

&&

LAT...LON 3929 8435 3940 8434 3937 8399 3929 8400
      3928 8401 3925 8400 3910 8401 3915 8446
      3930 8447

$$

The office that day

Everything else NWS Wilmington, OH issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 25, 8:18 PM EDTSevere Thunderstorm WarningILNDelaware, Franklin, Licking57 min
Jun 25, 8:54 PM EDTAreal Flood AdvisoryILNMadison2 hr
Jun 25, 9:08 PM EDTSevere Thunderstorm WarningILNDelaware, Fairfield, Franklin, Licking, Pickaway37 min
Jun 25, 9:24 PM EDTSevere Thunderstorm WarningILNFayette, Pickaway, Ross51 min
Jun 25, 9:35 PM EDTSevere Thunderstorm WarningILNFayette, Madison, Pickaway40 min
Jun 25, 10:01 PM EDTSevere Thunderstorm WarningILNFairfield, Franklin, Pickaway44 min
Jun 25, 10:04 PM EDTAreal Flood AdvisoryILNFranklin, Licking3 hr
Jun 25, 10:27 PM EDTSevere Thunderstorm WarningILNPike, Ross63 min
Jun 25, 10:46 PM EDTAreal Flood AdvisoryILNDelaware, Licking3 hr
Jun 25, 11:04 PM EDTSevere Thunderstorm WarningILNButler, Hamilton, Warren41 min
Jun 25, 11:39 PM EDTAreal Flood AdvisoryILNButler3 hr
Jun 25, 11:44 PM EDTSevere Thunderstorm WarningILNButler, Hamilton, Warren46 min
Jun 25, 11:50 PM EDTSevere Thunderstorm WarningILNDarke, Miami, Montgomery55 min
Jun 25, 11:52 PM EDTFlash Flood WarningILNButler3 hr
Jun 25, 11:59 PM EDTAreal Flood AdvisoryILNDarke, Miami3 hr
Jun 26, 12:16 AM EDTSevere Thunderstorm WarningILNClinton, Highland31 min
Jun 26, 12:32 AM EDTAreal Flood AdvisoryILNClark, Greene, Montgomery4 hr
Jun 26, 12:54 AM EDTAreal Flood AdvisoryILNDarke, Preble4 hr
Jun 26, 1:01 AM EDTSevere Thunderstorm WarningILNFayette, Highland, Pike, Ross44 min
Jun 26, 1:27 AM EDTAreal Flood AdvisoryILNWarren3 hr
Jun 26, 1:41 AM EDTFlash Flood WarningILNButler3 hr
Jun 26, 1:47 AM EDTAreal Flood AdvisoryILNFayette, Ross3 hr
Jun 26, 1:58 AM EDTSevere Thunderstorm WarningILNButler, Clermont, Hamilton47 min
Jun 26, 1:59 AM EDTAreal Flood AdvisoryILNClermont, Hamilton3 hr
Jun 26, 2:29 AM EDTSevere Thunderstorm WarningILNClermont, Hamilton61 min
Jun 26, 3:33 AM EDTAreal Flood AdvisoryILNAdams, Brown, Highland, Scioto3 hr

Nearby

Flash Flood Warnings in Ohio, 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.