Alert archive / Kentucky / Flash Flood Warnings in 2003

Flash Flood Warning 33, NWS Louisville, KY

August 11, 2003Grayson County, Kentucky

NWS Louisville, KY issued this flash flood warning at Aug 11, 2003, 3:37 PM CDT for Grayson County, Kentucky. It was in force for 113 min. 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 11, 2003, 3:37 PM CDT (20:37 UTC)
Expired
Aug 11, 2003, 5:30 PM CDT
In force
113 min
Issued by
NWS Louisville, KY
Area
Counties, with a storm outline in the text

County Grayson County, KY

The radar

The Louisville radar (KLVX), 71 km from the middle of the area, began a volume at 20:37 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.

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 8.6 hours before the alert went out and 150 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, Nashville Metro, TN at 12:00Z on 2003-08-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 414 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, Nashville Metro, TN at 12:00Z on 2003-08-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -8 square meters per square second.1939Sfc1 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
414 J/kg
Mixed-layer CIN
-51 J/kg
Mixed-layer LCL
789 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
-8 m²/s²
0-3 km storm-relative helicity
21 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 112038
FFWLMK
KYC085-112230-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LOUISVILLE KY
337 PM CDT MON AUG 11 2003

THE NATIONAL WEATHER SERVICE IN LOUISVILLE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  GRAYSON COUNTY IN SOUTH CENTRAL KENTUCKY

* UNTIL 530 PM CDT

AT 330 PM CDT, LAW ENFORCEMENT REPORTED WATER FLOWING OVER HIGHWAY 
259 AT THE BEAR CREEK BRIDGE, SOUTH OF LEITCHFIELD. RADAR HAS 
ESTIMATED THAT FROM 2 TO 3 INCHES OF RAIN HAS FALLEN SO FAR THIS 
AFTERNOON, PARTICULARLY IN THE AREA FROM SNAP, OVER TO NEAR 
LEITCHFIELD, TO CANEYVILLE. ADDITIONAL STORMS WILL LIKELY PRODUCE 
SIGNIFICANT RAINFALL.

THIS REPLACES THE URBAN AND SMALL STREAM FLOOD ADVISORY EARLIER 
ISSUED FOR GRAYSON COUNTY.

EXCESSIVE RAINFALL FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL
CREEKS AND STREAMS...ROADWAYS...UNDERPASSES AND LOW LYING AREAS.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE WATER COVERS THE ROADWAY.
THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY.
VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY. MOVE TO
HIGHER GROUND.

LAT...LON 3754 8666 3740 8660 3734 8612 3754 8612

$$

SMALLCOMB
1 follow-up statement
000 
WGUS73 KLMK 112158
FFSLMK
KYC085-112230-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LOUISVILLE KY
451 PM CDT MON AUG 11 2003

...A FLASH FLOOD WARNING CONTINUES UNTIL 530 PM CDT FOR GRAYSON
COUNTY IN SOUTH CENTRAL KENTUCKY...

AT 450 PM CDT, WEATHER SERVICE RADAR INDICATED THAT MUCH OF THE 
INTENSE RAINFALL HAD DISSIPATED OR EXITED GRAYSON COUNTY. LIGHT TO 
OCCASIONALLY MODERATE RAINS WILL CONTINUE HOWEVER THROUGH 530 PM. 
RUNOFF FROM THE EARLIER HEAVY RAINS WILL CONTINUE THE THREAT FOR 
FLASH FLOODING. TOTAL PRECIPITATION AMOUNTS RANGE FROM 1.5 TO 3 
INCHES ACROSS THE COUNTY, WITH THE HIGHEST AMOUNTS FROM CANEYVILLE, 
TO LEITCHFIELD, TO MILLERSTOWN.

LAW ENFORCEMENT HAS REPORTED A COUPLE ADDITIONAL SPOTS OF FLOODING, 
INCLUDING MAIN STREET IN DOWNTOWN LEITCHFIELD, AND ALONG HIGHWAY 224 
IN EASTERN GRAYSON COUNTY.

EXCESSIVE RAINFALL FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL
CREEKS AND STREAMS...ROADWAYS...UNDERPASSES AND LOW LYING AREAS.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE WATER COVERS THE ROADWAY.
THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY.
VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY. MOVE TO
HIGHER GROUND.

$$

SMALLCOMB

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 11, 9:01 AM CDTFlash Flood WarningLMKClinton, Russell119 min
Aug 11, 2:05 PM CDTSevere Thunderstorm WarningLMKBreckinridge, Meade25 min
Aug 11, 2:36 PM CDTFlash Flood WarningLMKButler84 min

Nearby

Flash Flood Warnings in Kentucky, 2003Every flash flood warning in 2003

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.