Alert archive / Kentucky / Flash Flood Warnings in 2012

Flash Flood Warning 23, NWS Wilmington, OH

July 18, 2012Boone County, Campbell County, Kenton County, Kentucky; Clermont County, Hamilton County, Ohio

NWS Wilmington, OH issued this flash flood warning at Jul 18, 2012, 4:48 PM EDT for Boone County, Campbell County, Kenton County, Kentucky; Clermont County, Hamilton County, Ohio. It was in force for 117 min. 5 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: Jul 18, 2012, 4:48 PM EDT (20:48 UTC)
Expired: Jul 18, 2012, 6:45 PM EDT
In force: 117 min
Issued by: NWS Wilmington, OH
Area: Storm-based polygon
Flood severity: None

Counties Boone County, KY, Campbell County, KY, Kenton County, KY, Clermont County, OH, Hamilton County, OH

The radar

The Cincinnati radar (KILN), 71 km from the middle of the area, began a volume at 20:51 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
Jul 18, 5:00 PM EDT	HEAVY RAIN 0	4 E Downtown Cincinnati, OH	1.10 INCHES IN 15 MINUTES PER CINCINNATI METRO SEWER DISTRICT RAIN GAUGE NEAR COLUMBIA-TUSCULUM.
Jul 18, 5:00 PM EDT	HEAVY RAIN 1.1	4 E Downtown Cincinnati, OH	1.10 INCHES IN 15 MINUTES PER CINCINNATI METRO SEWER DISTRICT RAIN GAUGE NEAR COLUMBIA-TUSCULUM.
Jul 18, 5:10 PM EDT	HEAVY RAIN 2.07	3 S Milford, OH	FELL IN 1 HOUR TWO MILES NORTH OF I-275 AND ROUTE 32
Jul 18, 5:15 PM EDT	FLASH FLOOD	Cincinnati, OH	REPORTS OF VEHICLES TRAPPED IN HIGH WATER NEAR GEST STREET AND DALTON AVENUE.
Jul 18, 5:38 PM EDT	HEAVY RAIN 2.8	Northgate, OH

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

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 8.8 hours before the alert went out and 73 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2497 J/kg
Mixed-layer CIN: -63 J/kg
Mixed-layer LCL: 1093 m above ground
0-6 km bulk shear: 4 kt
0-1 km storm-relative helicity: -23 m²/s²
0-3 km storm-relative helicity: -5 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

661 
WGUS51 KILN 182048
FFWILN
KYC015-037-117-OHC025-061-182245-
/O.NEW.KILN.FF.W.0023.120718T2048Z-120718T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE WILMINGTON OH
448 PM EDT WED JUL 18 2012

THE NATIONAL WEATHER SERVICE IN WILMINGTON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EXTREME NORTHERN BOONE COUNTY IN NORTHERN KENTUCKY...
  CAMPBELL COUNTY IN NORTHERN KENTUCKY...
  EXTREME NORTHERN KENTON COUNTY IN NORTHERN KENTUCKY...
  WESTERN CLERMONT COUNTY IN SOUTHWEST OHIO...
  HAMILTON COUNTY IN SOUTHWEST OHIO...

* UNTIL 645 PM EDT.

* AT 446 PM EDT...RADAR INDICATED THAT THUNDERSTORMS HAD PRODUCED
  HEAVY RAINFALL ACROSS THE WARNED AREA. RADAR ESTIMATED OVER AN 
  INCH OF RAIN IN UNDER A HALF HOUR IS LIKELY ACROSS THE CINCINNATI 
  METRO AREA.

* HEAVY RAIN CONTINUES TO FALL ACROSS THE WARNED AREA WITH ANOTHER
  TWO TO THREE INCHES POSSIBLE THROUGH 645 PM EDT. RUNOFF FROM
  THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO OCCUR.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

NEVER DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. ONLY A FEW INCHES
OF RAPIDLY FLOWING WATER CAN QUICKLY CARRY AWAY YOUR VEHICLE. FIND AN
ALTERNATE ROUTE OR WAIT UNTIL THE WATER RECEDES.

DO NOT ALLOW CHILDREN TO PLAY NEAR STORM DRAINS OR FLOODED CREEKS AND
STREAMS. THEY CAN EASILY BE SWEPT AWAY OR PULLED UNDER BY FAST MOVING
WATER.

&&

LAT...LON 3930 8480 3930 8454 3917 8420 3896 8416
      3914 8482 3919 8482

$$

2 follow-up statements

585 
WGUS71 KILN 182144
FFSILN

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE WILMINGTON OH
544 PM EDT WED JUL 18 2012

KYC015-037-117-OHC025-061-182245-
/O.CON.KILN.FF.W.0023.000000T0000Z-120718T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KENTON KY-BOONE KY-CAMPBELL KY-HAMILTON OH-CLERMONT OH-
544 PM EDT WED JUL 18 2012

...FLASH FLOOD WARNING CONTINUES FOR WESTERN CLERMONT...HAMILTON...
CAMPBELL...EXTREME NORTHERN BOONE AND EXTREME NORTHERN KENTON
COUNTIES UNTIL 645 PM EDT...

AT 538 PM EDT...THE PUBLIC REPORTED THAT EXCESSIVE RAINFALL WAS 
PRODUCING FLASH FLOODING IN SOUTHEAST HAMILTON COUNTY AND IN THE 
COLUMBIA-TUSCULUM AREA.

RADAR INDICATED THAT THE HEAVY RAINFALL HAS ENDED ACROSS THE AREA.
HOWEVER...RUNOFF FROM THE EARLIER EXCESSIVE RAIN WILL CAUSE FLASH
FLOODING TO CONTINUE TO OCCUR.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...ANDERSON
TOWNSHIP...BELLEVUE...CHEVIOT...CINCINNATI...DAYTON...DEER PARK...
FINNEYTOWN...FOREST PARK...FORT THOMAS...HARRISON...LUDLOW AND
MADEIRA.

IN ADDITION...FLOODING IS EXPECTED TO OCCUR IN...ADDYSTON...
AMBERLEY...ARLINGTON HEIGHTS...BRIDGETOWN NORTH...CHERRY GROVE...
COVEDALE...DAY HEIGHTS AND DENT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

NEVER DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. ONLY A FEW INCHES
OF RAPIDLY FLOWING WATER CAN QUICKLY CARRY AWAY YOUR VEHICLE. FIND AN
ALTERNATE ROUTE OR WAIT UNTIL THE WATER RECEDES.

DO NOT ALLOW CHILDREN TO PLAY NEAR STORM DRAINS OR FLOODED CREEKS AND
STREAMS. THEY CAN EASILY BE SWEPT AWAY OR PULLED UNDER BY FAST MOVING
WATER.

&&

LAT...LON 3930 8480 3930 8454 3917 8420 3896 8416
      3914 8482 3919 8482

$$

528 
WGUS71 KILN 182239
FFSILN

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE WILMINGTON OH
639 PM EDT WED JUL 18 2012

KYC015-037-117-OHC025-061-182249-
/O.EXP.KILN.FF.W.0023.000000T0000Z-120718T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KENTON KY-BOONE KY-CAMPBELL KY-HAMILTON OH-CLERMONT OH-
639 PM EDT WED JUL 18 2012

...THE FLASH FLOOD WARNING FOR WESTERN CLERMONT...HAMILTON...
CAMPBELL...EXTREME NORTHERN BOONE AND EXTREME NORTHERN KENTON
COUNTIES WILL EXPIRE AT 645 PM EDT...

STREAMS AND CREEKS IN THE WARNED AREA WILL CONTINUE TO RECEDE...AND 
THE FLOOD THREAT HAS ENDED. IF FLOODING HAS BEEN OBSERVED...PLEASE 
REPORT IT TO YOUR LOCAL LAW ENFORCEMENT AGENCY.

LAT...LON 3930 8480 3930 8454 3917 8420 3896 8416
      3914 8482 3919 8482

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 18, 8:15 AM EDT	Severe Thunderstorm Warning	ILN	Bracken, Mason	30 min
Jul 18, 10:34 AM EDT	Heat Advisory	ILN	Boone, Bracken, Campbell, Carroll, Gallatin, Grant and 6 more	8 hr
Jul 18, 4:17 PM EDT	Severe Thunderstorm Warning	ILN	Campbell, Kenton	43 min
Jul 18, 4:20 PM EDT	Severe Thunderstorm Warning	ILN	Boone	40 min
Jul 18, 4:33 PM EDT	Severe Thunderstorm Warning	ILN	Boone, Campbell, Gallatin, Kenton	42 min
Jul 18, 4:48 PM EDT	Severe Thunderstorm Warning	ILN	Bracken, Campbell, Kenton, Pendleton	42 min
Jul 18, 5:05 PM EDT	Flash Flood Warning	ILN	Campbell, Kenton, Pendleton	105 min
Jul 18, 5:11 PM EDT	Severe Thunderstorm Warning	ILN	Bracken, Campbell, Grant, Kenton, Pendleton, Robertson	49 min
Jul 18, 5:16 PM EDT	Special Weather Statement	ILN	Boone	29 min
Jul 18, 5:33 PM EDT	Flash Flood Warning	ILN	Bracken, Pendleton, Robertson	90 min
Jul 18, 5:40 PM EDT	Special Weather Statement	ILN	Gallatin, Grant, Owen	35 min
Jul 18, 5:59 PM EDT	Special Weather Statement	ILN	Bracken, Mason, Robertson	31 min
Jul 18, 6:19 PM EDT	Areal Flood Advisory	ILN	Grant, Owen, Pendleton	86 min
Jul 18, 6:19 PM EDT	Special Weather Statement	ILN	Owen	41 min
Jul 18, 7:16 AM EDT	Special Weather Statement	ILN	Clermont	29 min
Jul 18, 7:50 AM EDT	Special Weather Statement	ILN	Brown	25 min
Jul 18, 10:34 AM EDT	Excessive Heat Warning	ILN	Hamilton, Montgomery	8 hr
Jul 18, 12:27 PM EDT	Special Weather Statement	ILN	Darke, Miami	33 min
Jul 18, 12:56 PM EDT	Special Weather Statement	ILN	Miami	34 min
Jul 18, 1:21 PM EDT	Areal Flood Advisory	ILN	Miami, Shelby	114 min
Jul 18, 1:35 PM EDT	Special Weather Statement	ILN	Shelby	25 min
Jul 18, 1:44 PM EDT	Special Weather Statement	ILN	Preble	31 min
Jul 18, 1:50 PM EDT	Special Weather Statement	ILN	Logan	25 min
Jul 18, 1:55 PM EDT	Special Weather Statement	ILN	Auglaize	35 min
Jul 18, 1:58 PM EDT	Severe Thunderstorm Warning	ILN	Logan	32 min
Jul 18, 2:00 PM EDT	Severe Thunderstorm Warning	ILN	Auglaize, Shelby	30 min
Jul 18, 2:03 PM EDT	Special Weather Statement	ILN	Madison	27 min
Jul 18, 2:13 PM EDT	Special Weather Statement	ILN	Hardin	32 min
Jul 18, 2:15 PM EDT	Areal Flood Advisory	ILN	Champaign, Logan, Shelby	2 hr
Jul 18, 2:21 PM EDT	Severe Thunderstorm Warning	ILN	Hardin	24 min
Jul 18, 2:33 PM EDT	Special Weather Statement	ILN	Greene, Madison	27 min
Jul 18, 2:34 PM EDT	Areal Flood Advisory	ILN	Hardin, Logan	86 min
Jul 18, 2:38 PM EDT	Areal Flood Advisory	ILN	Clark, Madison	82 min
Jul 18, 2:46 PM EDT	Special Weather Statement	ILN	Hardin	29 min
Jul 18, 2:49 PM EDT	Special Weather Statement	ILN	Warren	26 min
Jul 18, 2:57 PM EDT	Special Weather Statement	ILN	Madison	33 min
Jul 18, 2:59 PM EDT	Special Weather Statement	ILN	Delaware	31 min
Jul 18, 3:05 PM EDT	Special Weather Statement	ILN	Shelby	25 min
Jul 18, 3:13 PM EDT	Special Weather Statement	ILN	Warren	32 min
Jul 18, 3:18 PM EDT	Special Weather Statement	ILN	Franklin	27 min
Jul 18, 3:35 PM EDT	Special Weather Statement	ILN	Fairfield	25 min
Jul 18, 3:36 PM EDT	Areal Flood Advisory	ILN	Delaware, Fairfield, Franklin, Licking	84 min
Jul 18, 3:46 PM EDT	Special Weather Statement	ILN	Licking	29 min
Jul 18, 3:49 PM EDT	Severe Thunderstorm Warning	ILN	Clermont, Hamilton, Warren	41 min
Jul 18, 3:56 PM EDT	Special Weather Statement	ILN	Licking	64 min
Jul 18, 4:06 PM EDT	Special Weather Statement	ILN	Hamilton	24 min
Jul 18, 4:14 PM EDT	Areal Flood Advisory	ILN	Clermont, Hamilton, Warren	91 min

Nearby

Flash Flood Warnings in Kentucky, 2012 Flash Flood Warnings in Ohio, 2012 Every flash flood warning in 2012

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.