Alert archive / Kentucky / Flash Flood Warnings in 2010

Flash Flood Warning 20, NWS Jackson, KY

May 14, 2010Knox County, Whitley County, Kentucky

NWS Jackson, KY issued this flash flood warning at May 14, 2010, 4:44 PM EDT for Knox County, Whitley 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 counties it named.

The facts

Issued: May 14, 2010, 4:44 PM EDT (20:44 UTC)
Expired: May 14, 2010, 9:00 PM EDT
In force: 4 hr
Issued by: NWS Jackson, KY
Area: Storm-based polygon
Flood severity: None

Counties Knox County, KY, Whitley County, KY

The radar

The Knoxville radar (KMRX), 90 km from the middle of the area, began a volume at 20:43 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, 8.7 hours before the alert went out and 245 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: 2636 J/kg
Mixed-layer CIN: -23 J/kg
Mixed-layer LCL: 831 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 53 m²/s²
0-3 km storm-relative helicity: 85 m²/s²
Significant tornado parameter: 1.1
Supercell composite: 5.3

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Jackson, KY wrote its last area forecast discussion before this flash flood warning went out at May 14, 3:35 PM EDT, 1 hour 9 minutes earlier.

Area forecast discussion, May 14, 3:35 PM EDT, 1 hour 9 minutes before

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Hazardous weather outlook, May 14, 1:10 PM EDT, 3 hours 34 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE JACKSON KY
110 PM EDT FRI MAY 14 2010

KYZ044-050>052-058>060-068-069-079-080-083>088-104-106>120-152015-
FLEMING-MONTGOMERY-BATH-ROWAN-ESTILL-POWELL-MENIFEE-ROCKCASTLE-
JACKSON-PULASKI-LAUREL-WAYNE-MCCREARY-WHITLEY-KNOX-BELL-HARLAN-
ELLIOTT-MORGAN-JOHNSON-WOLFE-MAGOFFIN-FLOYD-LEE-BREATHITT-KNOTT-
OWSLEY-PERRY-CLAY-LESLIE-LETCHER-MARTIN-PIKE-
INCLUDING THE CITIES OF...FLEMINGSBURG...MOUNT STERLING...
OWINGSVILLE...MOREHEAD...IRVINE...STANTON...FRENCHBURG...
MOUNT VERNON...MCKEE...SOMERSET...LONDON...MONTICELLO...
WHITLEY CITY...CORBIN...WILLIAMSBURG...BARBOURVILLE...MIDDLESBORO...
PINEVILLE...HARLAN...SANDY HOOK...WEST LIBERTY...PAINTSVILLE...
CAMPTON...SALYERSVILLE...PRESTONSBURG...BEATTYVILLE...JACKSON...
HINDMAN...BOONEVILLE...HAZARD...MANCHESTER...HYDEN...WHITESBURG...
INEZ...PIKEVILLE
110 PM EDT FRI MAY 14 2010

...SEVERE THUNDERSTORM WATCH 170 IN EFFECT UNTIL 8 PM EDT THIS
EVENING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EASTERN KENTUCKY.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

THUNDERSTORMS ARE EXPECTED THIS AFTERNOON AND INTO THE EARLY EVENING
HOURS. A FEW OF THESE STORMS COULD BE SEVERE WITH LARGE HAIL AND
DAMAGING WIND GUSTS THE MAIN THREATS. HOWEVER...A STRAY TORNADO CAN
NOT BE RULED OUT.

ADDITIONAL THUNDERSTORMS WILL BE POSSIBLE TONIGHT.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

THUNDERSTORMS ARE POSSIBLE EARLY SATURDAY MAINLY SOUTH OF THE HAL
ROGERS PARKWAY AND AGAIN SUNDAY MORNING.

THUNDERSTORMS WILL THEN BE POSSIBLE THROUGHOUT EAST KENTUCKY FROM
TIME TO TIME SUNDAY THROUGH TUESDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ARE ENCOURAGED TO REPORT ANY SEVERE THUNDERSTORMS TODAY.

JJ/GREIF

In the hours before

Local storm report, May 14, 3:49 PM EDT, 55 minutes before

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Local storm report, May 14, 4:00 PM EDT, 44 minutes before

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Local storm report, May 14, 4:07 PM EDT, 37 minutes before

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Local storm report, May 14, 4:09 PM EDT, 35 minutes before

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Local storm report, May 14, 4:32 PM EDT, 12 minutes before

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Local storm report, May 14, 4:39 PM EDT, 5 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
May 14, 2:29 PM EDT	Severe Thunderstorm Warning	JKL	Breathitt, Knott, Perry	31 min
May 14, 2:38 PM EDT	Severe Thunderstorm Warning	JKL	Knox, Laurel	37 min
May 14, 3:19 PM EDT	Severe Thunderstorm Warning	JKL	Bell, Knox	26 min
May 14, 3:23 PM EDT	Severe Thunderstorm Warning	JKL	Floyd, Knott, Pike	52 min
May 14, 3:33 PM EDT	Severe Thunderstorm Warning	JKL	Fleming	27 min
May 14, 3:42 PM EDT	Severe Thunderstorm Warning	JKL	Bell, Clay, Harlan, Knox, Leslie	33 min
May 14, 3:56 PM EDT	Areal Flood Advisory	JKL	Knox	57 min
May 14, 4:05 PM EDT	Severe Thunderstorm Warning	JKL	Pike	25 min
May 14, 4:14 PM EDT	Areal Flood Advisory	JKL	Whitley	38 min
May 14, 4:20 PM EDT	Severe Thunderstorm Warning	JKL	Knox, Whitley	25 min
May 14, 4:30 PM EDT	Severe Thunderstorm Warning	JKL	Bell, Harlan	30 min
May 14, 4:30 PM EDT	Severe Thunderstorm Warning	JKL	Elliott, Rowan	30 min
May 14, 5:05 PM EDT	Flash Flood Warning	JKL	Bell, Knox, Whitley	4 hr
May 14, 5:13 PM EDT	Severe Thunderstorm Warning	JKL	Bell, Harlan	32 min
May 14, 5:33 PM EDT	Flash Flood Warning	JKL	Harlan	4 hr
May 14, 5:45 PM EDT	Severe Thunderstorm Warning	JKL	Harlan	30 min
May 14, 5:46 PM EDT	Severe Thunderstorm Warning	JKL	Elliott, Johnson, Magoffin, Menifee, Morgan, Wolfe	44 min

Nearby

Flash Flood Warnings in Kentucky, 2010 Every flash flood warning in 2010

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.