Alert archive / Kentucky / Flash Flood Warnings in 2009

Flash Flood Warning 13, NWS Louisville, KY

May 27, 2009Grayson County, Ohio County, Kentucky

NWS Louisville, KY issued this flash flood warning at May 27, 2009, 2:46 PM CDT for Grayson County, Ohio County, Kentucky. It was in force for 59 min. 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: May 27, 2009, 2:46 PM CDT (19:46 UTC)
Expired: May 27, 2009, 3:45 PM CDT
In force: 59 min
Issued by: NWS Louisville, KY
Area: Storm-based polygon
Flood severity: None

Counties Grayson County, KY, Ohio County, KY

The radar

The Louisville radar (KLVX), 83 km from the middle of the area, began a volume at 19:49 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
May 27, 2:50 PM CDT	FLASH FLOOD	Caneyville, KY	STREET FLOODING OF 2 TO 4 INCHES IN CANEYVILLE
May 27, 2:55 PM CDT	FLOOD	Caneyville, KY	FLOODING ON PARTS OF HIGHWAY 62
May 27, 3:03 PM CDT	FLASH FLOOD	8 E Beaver Dam, KY	TWO TO 4 INCHES OF WATER REPORTED ACROSS SEVERAL STREETS IN HORSE BRANCH
May 27, 3:10 PM CDT	FLASH FLOOD	8 E Beaver Dam, KY	SPOTTER REPORTED THAT 6 TO 8 INCHES OF WATER COVERED SOME ROADS IN BEAVER DAM. HE MEASURED 1.5 INCHES OF RAIN IN JUST OVER ONE HOUR.

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

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 7.8 hours before the alert went out and 143 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: 433 J/kg
Mixed-layer CIN: -26 J/kg
Mixed-layer LCL: 679 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 25 m²/s²
0-3 km storm-relative helicity: 50 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.

000 
WGUS53 KLMK 271946
FFWLMK
KYC085-183-272045-
/O.NEW.KLMK.FF.W.0013.090527T1946Z-090527T2045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LOUISVILLE KY
246 PM CDT WED MAY 27 2009

THE NATIONAL WEATHER SERVICE IN LOUISVILLE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL OHIO COUNTY IN NORTHWEST KENTUCKY...
  WESTERN AND CENTRAL GRAYSON COUNTY IN SOUTH CENTRAL KENTUCKY...

* UNTIL 345 PM CDT

* AT 242 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  THAT OVER 2 INCHES OF RAIN HAD FALLEN OVER THE PAST HOUR
  ACROSS EASTERN OHIO AND 
  WESTERN GRAYSON COUNTIES. NEARLY STATIONARY STORMS EXTENDED ALONG A 
  LINE FROM LEITCHFIELD TO BEDA...OR ALONG A LINE EXTENDING FROM 34 
  MILES NORTH OF BOWLING GREEN TO 15 MILES NORTHEAST OF CENTRAL CITY. 

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  CENTERTOWN...MILLWOOD...HARTFORD...ROSINE AND MCHENRY.

  ADDITIONAL RAINFALL AMOUNTS OF UP TO 1 INCH ARE POSSIBLE IN THE 
  WARNED AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.

&&

LAT...LON 3734 8626 3737 8650 3740 8663 3737 8702
      3755 8704 3753 8630

$$

JSD

2 follow-up statements

000 
WGUS73 KLMK 272019
FFSLMK

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LOUISVILLE KY
319 PM CDT WED MAY 27 2009

KYC085-183-272045-
/O.CON.KLMK.FF.W.0013.000000T0000Z-090527T2045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
OHIO KY-GRAYSON KY-
319 PM CDT WED MAY 27 2009

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 345 PM CDT FOR
WESTERN GRAYSON AND CENTRAL OHIO COUNTIES...

THROUGH 310 PM EDT...DOPPLER RADAR ESTIMATED THAT TWO TO THREE INCHES 
OF RAIN HAD FALLEN IN EASTERN OHIO AND WESTERN GRAYSON COUNTIES.

AT 250 PM CDT...TRAINED WEATHER SPOTTERS REPORTED THAT STATE 
HIGHWAY 62 JUST WEST OF CANEYVILLE WAS FLOODED. IN ADDITION...MINOR 
STREET FLOODING WAS REPORTED IN HORSE BRANCH IN EASTERN OHIO COUNTY
A SPOTTER REPORTED MINOR STREET FLOODING IN CANEYVILLE AS WELL. 

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
LEITCHFIELD...CANEYVILLE...BEDA...HEFLIN...YEAMAN AND SHORT CREEK.

ADDITIONAL RAINFALL AMOUNTS OF UP TO ONE HALF INCH ARE POSSIBLE IN
THE WARNED AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.

&&

LAT...LON 3734 8626 3737 8650 3740 8663 3737 8702
      3755 8704 3753 8630

$$

JSD

000 
WGUS73 KLMK 272047
FFSLMK

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LOUISVILLE KY
347 PM CDT WED MAY 27 2009

KYC085-183-272056-
/O.EXP.KLMK.FF.W.0013.000000T0000Z-090527T2045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
OHIO KY-GRAYSON KY-
347 PM CDT WED MAY 27 2009

...THE FLASH FLOOD WARNING HAS EXPIRED FOR WESTERN GRAYSON AND
CENTRAL OHIO COUNTIES...

RAINFALL HAS DIMINISHED ACROSS THE WARNED AREA. CALLS TO LOCAL 
EMERGENCY MANAGERS INDICATE THAT NO SERIOUS FLASH FLOODING WAS REPORTED.  

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.

LAT...LON 3734 8626 3737 8650 3740 8663 3737 8702
      3755 8704 3753 8630

$$

JSD

The office that day

Everything else NWS Louisville, KY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 27, 4:32 PM CDT	Severe Thunderstorm Warning	LMK	Butler	28 min
May 27, 4:39 PM CDT	Areal Flood Advisory	LMK	Bourbon, Nicholas	78 min

Nearby

Flash Flood Warnings in Kentucky, 2009 Every 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.