Alert archive / Kentucky / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 68, NWS Jackson, KY

June 12, 2010Johnson County, Magoffin County, Morgan County, Kentucky

NWS Jackson, KY issued this severe thunderstorm warning at Jun 12, 2010, 4:43 PM EDT for Johnson County, Magoffin County, Morgan County, Kentucky. It was in force for 32 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jun 12, 2010, 4:43 PM EDT (20:43 UTC)
Expired
Jun 12, 2010, 5:15 PM EDT
In force
32 min
Issued by
NWS Jackson, KY
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Johnson County, KY, Magoffin County, KY, Morgan County, KY

The radar

The Jackson,KY radar (KJKL), 35 km from the middle of the area, began a volume at 20:44 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, 8.7 hours before the alert went out and 190 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 2010-06-12Temperature 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°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Cncnati-Daytn, OH at 12:00Z on 2010-06-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 6 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
-37 J/kg
Mixed-layer LCL
827 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
6 m²/s²
0-3 km storm-relative helicity
5 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at Jun 12, 3:00 PM EDT, 1 hour 43 minutes earlier.

Area forecast discussion, Jun 12, 3:00 PM EDT, 1 hour 43 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE JACKSON KY
300 PM EDT SAT JUN 12 2010

.SHORT TERM.../TONIGHT THROUGH MONDAY NIGHT/...UPDATED

MODELS ARE IN GOOD AGREEMENT FOR THE SHORT TERM. IN GENERAL...WE WILL
BE DOMINATED BY THE UPPER RIDGE. THE FRONT WILL BE TO THE WEST AND
NORTH OF THE AREA AND WE WILL BE IN THE WARM SECTOR. THERE WILL BE A
COMBINATION OF SHORT WAVES AND AFTERNOON HEATING WHICH WILL BE THE
MAIN DRIVER IN GETTING THE CONVECTIVE ACTIVITY GOING. WITH THE MODELS
IN GOOD AGREEMENT...KEPT PRETTY CLOSE TO MOS AND TENDED TO PREFER THE
NAM FOR THE FIRST 36 HOURS OF THE FORECAST.

.LONG TERM.../TUESDAY THROUGH SATURDAY/...UPDATED

MODELS IN GOOD AGREEMENT THAT MID/UPPER LEVEL HIGH PRESSURE WILL
REMAIN ANCHORED OVER THE SOUTHEAST AND SOUTH CENTRAL UNITED STATES
DURING THE UPCOMING WEEK. THIS WILL KEEP TEMPERATURES WELL ABOVE
NORMAL THROUGH THE FORECAST PERIOD...AND ALSO KEEP HUMID CONDITIONS
ACROSS THE AREA. SHORT WAVES TRAVERSING THE NORTHERN PERIPHERY OF
THE RIDGE WILL BRING A THREAT OF THUNDERSTORMS FROM TUESDAY INTO
WEDNESDAY NIGHT. IT NOW APPEARS THE RIDGE MAY BE DOMINANT ENOUGH ON
THURSDAY AND FRIDAY TO KEEP PRECIPITATION CHANCES OUT OF THE
FORECAST...ALTHOUGH AN ISOLATED SHOWER OR THUNDERSTORM CANNOT
TOTALLY BE RULED OUT DURING THE AFTERNOON HOURS. A COLD FRONT IS
FORECAST TO APPROACH THE AREA ON SATURDAY...AND WILL INTRODUCE A
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS FOR SATURDAY AFTERNOON.

&&

.AVIATION.../18Z TO 18Z/

A SHORT WAVE IS CURRENTLY MOVING ACROSS THE AREA. THERE WAS A LINE OF
SHOWERS WITH SOME ISOLATED THUNDERSTORMS...WHICH EXTENDS FROM ELLIOT TO
CLAY COUNTY. THERE WAS ALSO A CLUSTER OF SHOWERS WITH SOME ISOLATED
THUNDERSTORMS MOSTLY OVER MARTIN AND PIKE COUNTIES. ALL OF THIS
ACTIVITY IS EXPECTED TO BE MOVING TO THE EAST. THE AIR IS STILL
UNSTABLE BEHIND THIS SHORT WAVE AND SO CAN EXPECT SOME SCATTERED
THUNDERSTORMS TO BUILD UP THIS AFTERNOON. THESE STORM WILL LIKELY BE
MORE WIDESPREAD THAN WHAT WE SAW THIS MORNING...BUT POTENTIALLY THEY
COULD BE STRONGER AND MORE LIKELY TO PRODUCE SOME STRONG WINDS AND
SMALL HAIL.

VFR CONDITIONS WILL PREVAIL IN MOST AREAS TODAY...EXCEPT FOR SOME
TEMPO IFR TO LIFR CONDITIONS VICINITY OF THUNDERSTORMS. THE EXTENT OF
THE FOG WILL DEPEND ON HOW MUCH CLOUD COVER PERSISTS THROUGH THE
NIGHT. AT THIS TIME IT APPEARS THAT AT LEAST IFR VISIBILITIES WILL BE
WIDESPREAD TONIGHT...EXCEPT FOR RIDGE TOP LOCATIONS WHERE VFR WITH
SOME MVFR...ESPECIALLY NEAR DAWN...SHOULD PREVAIL.

&&

.JKL WATCHES/WARNINGS/ADVISORIES...NONE.

&&

SHORT TERM...JJ
LONG TERM...SBH
AVIATION...JJ
Hazardous weather outlook, Jun 12, 4:30 AM EDT, 12 hours 13 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE JACKSON KY
430 AM EDT SAT JUN 12 2010

KYZ044-050>052-058>060-068-069-079-080-083>088-104-106>120-131100-
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-
430 AM EDT SAT JUN 12 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EASTERN KENTUCKY.

.DAY ONE...TODAY AND TONIGHT.

NUMEROUS TO WIDESPREAD THUNDERSTORMS ARE EXPECTED TODAY. SOME STORMS
COULD APPROACH SEVERE LIMITS...WITH DAMAGING WINDS THE MAIN THREAT.

ADDITIONALLY...ANY SLOW-MOVING THUNDERSTORMS OR STORMS THAT PASS
REPEATEDLY ACROSS THE SAME LOCATION WILL PRODUCE HEAVY RAINFALL.
THIS MAY CAUSE ISOLATED FLASH FLOODING...ESPECIALLY OVER AREAS
THAT HAVE SEEN RECENT HEAVY RAINFALL.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

THUNDERSTORMS ARE POSSIBLE FROM SUNDAY THROUGH FRIDAY...ESPECIALLY
DURING THE AFTERNOON AND EVENING HOURS. SOME STORMS COULD PRODUCE
LOCALLY HEAVY RAINFALL AND GUSTY WINDS.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS ARE ENCOURAGED TO REPORT ANY MEASURED HEAVY RAINFALL OF AN
INCH OR MORE IN AN HOUR...AS WELL AS FLOODING OR STRONG WIND GUSTS
TODAY.

GEOGERIAN

In the hours before

Special weather statement, Jun 12, 3:31 PM EDT, 1 hour 12 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON KY
331 PM EDT SAT JUN 12 2010

KYZ109-110-112-113-120-122015-
MAGOFFIN-FLOYD-PIKE-BREATHITT-KNOTT-
331 PM EDT SAT JUN 12 2010

...A STRONG THUNDERSTORM TO AFFECT THE FOLLOWING COUNTIES THROUGH 415
PM EDT SATURDAY AFTERNOON...

   SOUTHEASTERN MAGOFFIN...
   CENTRAL FLOYD...
   WEST CENTRAL PIKE...
   EXTREME EAST CENTRAL BREATHITT AND
   NORTHEASTERN KNOTT.

AT 331 PM EDT...A STRONG THUNDERSTORM WAS LOCATED NEAR WALDO...OR 14
MILES SOUTHWEST OF PRESTONSBURG...MOVING EAST AT 30 MPH.

LOCATIONS AFFECTED INCLUDE...BUT ARE NOT LIMITED TO...HIPPO AROUND
340 PM EDT...EASTERN AROUND 345 PM EDT...LANGLEY AROUND 350 PM EDT...
HUNTER AROUND 355 PM EDT...AND BLUE MOON AROUND 400 PM EDT.

RESIDENTS SHOULD EXPECT HEAVY RAIN...WITH RAINFALL RATES OF UP TO ONE
INCH PER HOUR...GUSTY WINDS OF 30 TO 40 MPH...FREQUENT LIGHTNING AND
SMALL HAIL IN THESE AREAS.

THE HEAVY RAIN WILL LIKELY CAUSE PONDING OF WATER ON AREA ROADWAYS.
MOTORISTS ARE URGED TO DRIVE CAREFULLY.

GREIF
Special weather statement, Jun 12, 4:38 PM EDT, 5 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jun 12, 4:49 PM EDTAreal Flood AdvisoryJKLJohnson, Magoffin, Morgan3 hr
Jun 12, 5:39 PM EDTAreal Flood AdvisoryJKLBath, Elliott, Fleming, Morgan, Rowan3 hr
Jun 12, 6:41 PM EDTFlash Flood WarningJKLElliott, Johnson, Morgan, Rowan3 hr
Jun 12, 6:58 PM EDTAreal Flood AdvisoryJKLLetcher, Pike3 hr

Nearby

Severe Thunderstorm Warnings in Kentucky, 2010Every severe thunderstorm 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.