Alert archive / Kentucky / Flash Flood Warnings in 2011

Flash Flood Warning 46, NWS Wilmington, OH

August 18, 2011Owen County, Kentucky

NWS Wilmington, OH issued this flash flood warning at Aug 18, 2011, 11:13 PM EDT for Owen County, Kentucky. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Aug 18, 2011, 11:13 PM EDT (03:13 UTC)
Expired
Aug 19, 2011, 1:28 AM EDT
In force
2 hr
Issued by
NWS Wilmington, OH
Area
Storm-based polygon
Flood severity
None

County Owen County, KY

The radar

The Louisville radar (KLVX), 104 km from the middle of the area, began a volume at 03:13 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.

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 00:00Z, 3.2 hours before the alert went out and 146 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, Cncnati-Daytn, OH at 00:00Z on 2011-08-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 963 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Cncnati-Daytn, OH at 00:00Z on 2011-08-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 48 square meters per square second.19395878Sfc1 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
963 J/kg
Mixed-layer CIN
-34 J/kg
Mixed-layer LCL
1570 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
48 m²/s²
0-3 km storm-relative helicity
60 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.5

Open this sounding in Storm Lab

The text

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

985 
WGUS51 KILN 190313
FFWILN
KYC187-190615-
/O.NEW.KILN.FF.W.0046.110819T0313Z-110819T0615Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE WILMINGTON OH
1113 PM EDT THU AUG 18 2011

THE NATIONAL WEATHER SERVICE IN WILMINGTON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHWESTERN OWEN COUNTY IN NORTHERN KENTUCKY...

* UNTIL 215 AM EDT.

* AT 1110 PM EDT...RADAR INDICATED THAT THUNDERSTORMS HAD PRODUCED   
  HEAVY RAINFALL ACROSS THE WARNED AREA. RADAR ESTIMATED AS MUCH AS 
  4 INCHES OF RAIN HAS FALLEN NEAR THE KENTUCKY RIVER IN OWEN COUNTY 
  TONIGHT. 

* HEAVY RAIN CONTINUES TO FALL ACROSS THE WARNED AREA WITH ANOTHER  
  1 TO 2 INCHES POSSIBLE THROUGH 215 AM EDT. RUNOFF FROM THIS   
  EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO OCCUR.

FLOODING IS EXPECTED TO OCCUR OVER MAINLY RURAL AREAS OF SOUTHWESTERN
OWEN COUNTY...INCLUDING GRATZ...MONTEREY AND SQUIRESVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

ACT QUICKLY TO PROTECT YOUR LIFE IF YOU ARE IN A LOW LYING AREA...
ALONG A CREEK...STREAM OR IN AN AREA EXPERIENCING FLOODING. MOVE TO
HIGHER GROUND IMMEDIATELY.

FLOOD DANGERS ARE HARDER TO RECOGNIZE AT NIGHT. BE ESPECIALLY
CAUTIOUS.

&&

LAT...LON 3837 8490 3839 8490 3842 8489 3846 8492
      3843 8495 3847 8496 3849 8500 3851 8499
      3851 8503 3856 8501 3860 8502 3857 8488
      3836 8472 3833 8479

$$
1 follow-up statement
247 
WGUS71 KILN 190528
FFSILN

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE WILMINGTON OH
128 AM EDT FRI AUG 19 2011

KYC187-190537-
/O.CAN.KILN.FF.W.0046.000000T0000Z-110819T0615Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
OWEN KY-
128 AM EDT FRI AUG 19 2011

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR SOUTHWESTERN OWEN
COUNTY HAS BEEN CANCELLED...

THE HEAVY RAINFALL THAT HAD PROMPTED THE FLASH FLOOD WARNING HAS 
DIMINISHED AND PUSHED OUT OF THE AREA OVER THE PAST HOUR. ALTHOUGH 
STREAMS WILL CONTINUE TO RECEDE...THERE STILL MAY BE LINGERING HIGH 
WATER IN WESTERN OWEN COUNTY.

LAT...LON 3837 8490 3839 8490 3842 8489 3846 8492
      3843 8495 3847 8496 3849 8500 3851 8499
      3851 8503 3856 8501 3860 8502 3857 8488
      3836 8472 3833 8479

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 18, 8:02 PM EDTSpecial Weather StatementILNOwen58 min
Aug 18, 9:55 PM EDTAreal Flood AdvisoryILNOwen2 hr
Aug 18, 10:11 PM EDTSpecial Weather StatementILNOwen64 min
Aug 18, 11:39 PM EDTSpecial Weather StatementILNBracken, Robertson36 min
Aug 18, 11:47 PM EDTSpecial Weather StatementILNBoone, Kenton43 min
Aug 19, 12:01 AM EDTSpecial Weather StatementILNBracken44 min

Nearby

Flash Flood Warnings in Kentucky, 2011Every flash flood warning in 2011

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.