Alert archive / Kentucky / Flash Flood Warnings in 2012

Flash Flood Warning 38, NWS Jackson, KY

July 31, 2012Harlan County, Kentucky

NWS Jackson, KY issued this flash flood warning at Jul 31, 2012, 5:27 PM EDT for Harlan County, Kentucky. It was in force for 4 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
Jul 31, 2012, 5:27 PM EDT (21:27 UTC)
Expired
Jul 31, 2012, 9:20 PM EDT
In force
4 hr
Issued by
NWS Jackson, KY
Area
Storm-based polygon
Flood severity
None

County Harlan County, KY

The radar

The Jackson,KY radar (KJKL), 81 km from the middle of the area, began a volume at 21:28 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 12:00Z, 9.5 hours before the alert went out and 290 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 12:00Z on 2012-07-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 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 12:00Z on 2012-07-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 13 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1498 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
13 m²/s²
0-3 km storm-relative helicity
45 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.

615 
WGUS53 KJKL 312127
FFWJKL
KYC095-010330-
/O.NEW.KJKL.FF.W.0038.120731T2127Z-120801T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE JACKSON KY
527 PM EDT TUE JUL 31 2012

THE NATIONAL WEATHER SERVICE IN JACKSON KY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EAST CENTRAL HARLAN COUNTY IN SOUTHEAST KENTUCKY...

* UNTIL 1130 PM EDT

* AT 525 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE      
  WARNED AREA. RADAR ESTIMATES SHOW THAT UP TO 2.5 INCHES OF RAIN    
  HAS ALRADY FALLEN OVER THE WARNED AREA. 

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  BENITO...BLACK BOTTOM...CHAD...CLOSPLINT...CLOVER FORK...
  CLOVER-DARBY...CREECH...DIANE...GANO...GEORGETOWN...HIGHSPLINT...
  HIRAM...HOLMES MILL...LEJUNIOR...LEONARD...LOUELLEN...RIDGEWAY...
  RILEYVILLE...RUTHERFORD...SHIELDS AND TOTZ.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

ADDITIONAL RAINFALL AMOUNTS OF 1 TO 2 INCHES ARE POSSIBLE IN THE 
WARNED AREA.

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.

&&

LAT...LON 3685 8303 3685 8307 3686 8313 3690 8316
      3694 8314 3698 8305 3698 8302 3698 8303
      3687 8292 3686 8299 3684 8301

$$

KAS
1 follow-up statement
216 
WGUS73 KJKL 010120
FFSJKL

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE JACKSON KY
920 PM EDT TUE JUL 31 2012

KYC095-010135-
/O.CAN.KJKL.FF.W.0038.000000T0000Z-120801T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
HARLAN KY-
920 PM EDT TUE JUL 31 2012

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR EAST CENTRAL HARLAN
COUNTY IS CANCELLED...

EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA. STREAMS
AND CREEKS IN THE WARNED AREA HAVE RECEDED OR WERE BEGINNING TO
RECEDE...ENDING THE FLOOD THREAT. IF FLOODING HAS BEEN OBSERVED...
PLEASE REPORT IT TO YOUR LOCAL LAW ENFORCEMENT AGENCY.

LAT...LON 3685 8303 3685 8307 3686 8313 3690 8316
      3694 8314 3698 8305 3698 8302 3698 8303
      3687 8292 3686 8299 3684 8301

$$

KAS

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 31, 4:04 PM EDTSevere Thunderstorm WarningJKLFloyd, Knott, Letcher, Pike26 min
Jul 31, 4:29 PM EDTSevere Thunderstorm WarningJKLLetcher, Pike31 min
Jul 31, 4:30 PM EDTAreal Flood AdvisoryJKLLetcher, Pike4 hr
Jul 31, 5:04 PM EDTSevere Thunderstorm WarningJKLLetcher26 min
Jul 31, 5:12 PM EDTAreal Flood AdvisoryJKLHarlan4 hr
Jul 31, 5:46 PM EDTAreal Flood AdvisoryJKLPike3 hr
Jul 31, 6:05 PM EDTAreal Flood AdvisoryJKLPike3 hr
Jul 31, 6:05 PM EDTFlash Flood WarningJKLPike3 hr
Jul 31, 6:23 PM EDTAreal Flood AdvisoryJKLHarlan, Letcher2 hr
Jul 31, 6:23 PM EDTAreal Flood AdvisoryJKLHarlan, Leslie, Letcher, Perry2 hr

Nearby

Flash Flood Warnings in Kentucky, 2012Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.