Alert archive / Kentucky / Flash Flood Warnings in 2012

Flash Flood Warning 20, NWS Jackson, KY

May 21, 2012Powell County, Wolfe County, Kentucky

NWS Jackson, KY issued this flash flood warning at May 21, 2012, 2:44 PM EDT for Powell County, Wolfe County, Kentucky. It was in force for 3 hr. 2 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 21, 2012, 2:44 PM EDT (18:44 UTC)
Expired
May 21, 2012, 5:30 PM EDT
In force
3 hr
Issued by
NWS Jackson, KY
Area
Storm-based polygon
Flood severity
None

Counties Powell County, KY, Wolfe County, KY

The radar

The Jackson,KY radar (KJKL), 31 km from the middle of the area, began a volume at 18:46 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

TimeReportWhereRemark
May 21, 2:48 PM EDTHEAVY RAIN 1.93Natural Bridge S.P., KY1.93 INCHES OF RAIN IN 30 MINUTES WAS REPORTED BY AN IFLOWS RAIN GAUGE NEAR NATURAL BRIDGE STATE PARK.
May 21, 3:30 PM EDTFLASH FLOODNatural Bridge S.P., KYTWO ROADS WERE CLOSED DUE TO HIGH WATER.

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, 6.7 hours before the alert went out and 188 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 2012-05-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2012-05-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -20 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
1563 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
-20 m²/s²
0-3 km storm-relative helicity
20 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.

367 
WGUS53 KJKL 211844
FFWJKL
KYC197-237-212130-
/O.NEW.KJKL.FF.W.0020.120521T1844Z-120521T2130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE JACKSON KY
244 PM EDT MON MAY 21 2012

THE NATIONAL WEATHER SERVICE IN JACKSON KY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHEASTERN POWELL COUNTY IN EAST CENTRAL KENTUCKY...
  WESTERN WOLFE COUNTY IN SOUTHEAST KENTUCKY...

* UNTIL 530 PM EDT

* AT 244 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE      
  WARNED AREA. AN IFLOWS GAGE REPORTED THAT OVER AN INCH OF RAIN
  HAD FALLEN IN 15 MINUTES TIME. 

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  CAMPTON...BOOTH...GLENCAIRN...GRANNIE...HIGH FALLS...JENSON...
  KOOMER RIDGE CAMPGROUND...NATURAL BRIDGE S.P....PINE RIDGE...
  ROGERS...SEE...SLADE AND TORRENT.

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.

FLOODING IS OCCURRING OR IS IMMINENT. IT IS IMPORTANT TO KNOW WHERE
YOU ARE RELATIVE TO STREAMS...RIVERS...OR CREEKS WHICH CAN BECOME
KILLERS IN HEAVY RAINS. CAMPERS AND HIKERS SHOULD AVOID STREAMS OR
CREEKS.

&&

LAT...LON 3772 8350 3767 8360 3776 8378 3784 8367

$$

GEOGERIAN
2 follow-up statements
707 
WGUS73 KJKL 211947
FFSJKL

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE JACKSON KY
347 PM EDT MON MAY 21 2012

KYC197-237-212130-
/O.CON.KJKL.FF.W.0020.000000T0000Z-120521T2130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
POWELL KY-WOLFE KY-
347 PM EDT MON MAY 21 2012

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR WESTERN WOLFE AND
SOUTHEASTERN POWELL COUNTIES UNTIL 530 PM EDT...

AT 338 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THUNDERSTORMS WITH VERY HEAVY RAINFALL HAD MOVED OUT OF THE 
AREA...HOWEVER RUNOFF FROM PREVIOUS EXCESSIVE RAINFALL WILL STILL
CAUSE CREEKS AND STREAMS TO RUN NEAR BANKFULL...WITH THE POTENTIAL 
FOR ADDITIONAL THUNDERSTORMS TO MOVE INTO THE AREA BETWEEN 4:30 AND 
5 PM. SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING 
INCLUDE...CAMPTON...BOOTH...GLENCAIRN...GRANNIE...HIGH 
FALLS...JENSON...KOOMER RIDGE CAMPGROUND...NATURAL BRIDGE 
S.P....PINE RIDGE...ROGERS...SEE...SLADE AND TORRENT.

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.

FLOODING IS OCCURRING OR IS IMMINENT. IT IS IMPORTANT TO KNOW WHERE
YOU ARE RELATIVE TO STREAMS...RIVERS...OR CREEKS WHICH CAN BECOME
KILLERS IN HEAVY RAINS. CAMPERS AND HIKERS SHOULD AVOID STREAMS OR
CREEKS.

&&

LAT...LON 3772 8350 3767 8360 3776 8378 3784 8367

$$

GEOGERIAN
111 
WGUS73 KJKL 212130
FFSJKL

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE JACKSON KY
530 PM EDT MON MAY 21 2012

KYC197-237-212146-
/O.EXP.KJKL.FF.W.0020.000000T0000Z-120521T2130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
POWELL KY-WOLFE KY-
530 PM EDT MON MAY 21 2012

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR WESTERN WOLFE AND
SOUTHEASTERN POWELL COUNTIES HAS BEEN ALLOWED TO EXPIRE...

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 3772 8350 3767 8360 3776 8378 3784 8367

$$

GEOGERIAN

The office that day

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

IssuedProductOfficeCountiesLasted
May 21, 12:53 PM EDTSevere Thunderstorm WarningJKLClay, Jackson, Lee, Owsley37 min
May 21, 1:11 PM EDTAreal Flood AdvisoryJKLLee, Owsley79 min
May 21, 2:01 PM EDTAreal Flood AdvisoryJKLMenifee89 min
May 21, 2:04 PM EDTSevere Thunderstorm WarningJKLBath, Menifee, Montgomery41 min
May 21, 2:22 PM EDTFlash Flood WarningJKLMenifee, Montgomery3 hr
May 21, 2:32 PM EDTAreal Flood AdvisoryJKLLee, Menifee, Montgomery, Powell, Wolfe88 min
May 21, 2:34 PM EDTAreal Flood AdvisoryJKLClay, Jackson, Laurel86 min
May 21, 2:36 PM EDTSevere Thunderstorm WarningJKLEstill, Lee, Powell, Wolfe39 min
May 21, 2:49 PM EDTAreal Flood AdvisoryJKLBath, Fleming, Rowan101 min
May 21, 2:56 PM EDTSevere Thunderstorm WarningJKLEstill, Lee49 min
May 21, 3:02 PM EDTAreal Flood AdvisoryJKLEstill, Lee88 min
May 21, 3:11 PM EDTSevere Thunderstorm WarningJKLBath, Fleming49 min
May 21, 3:15 PM EDTFlash Flood WarningJKLEstill, Lee3 hr
May 21, 3:35 PM EDTFlash Flood WarningJKLBath, Fleming3 hr
May 21, 3:45 PM EDTAreal Flood AdvisoryJKLClay, Laurel75 min
May 21, 3:49 PM EDTAreal Flood AdvisoryJKLEstill, Jackson, Lee, Owsley101 min
May 21, 3:59 PM EDTAreal Flood AdvisoryJKLBath, Fleming, Montgomery2 hr
May 21, 4:35 PM EDTAreal Flood AdvisoryJKLBell, Knox, Whitley115 min
May 21, 4:45 PM EDTAreal Flood AdvisoryJKLClay, Jackson, Laurel46 min
May 21, 5:12 PM EDTAreal Flood AdvisoryJKLFleming108 min
May 21, 5:45 PM EDTAreal Flood WarningJKLPowell3 hr
May 21, 6:02 PM EDTFlash Flood WarningJKLFleming3 hr
May 21, 6:15 PM EDTFlash Flood WarningJKLWhitley3 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.