Alert archive / Kentucky / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 208, NWS Jackson, KY

September 8, 20094 counties in Kentucky

NWS Jackson, KY issued this severe thunderstorm warning at Sep 8, 2009, 2:39 PM EDT for 4 counties in Kentucky. It was in force for 35 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
Sep 8, 2009, 2:39 PM EDT (18:39 UTC)
Expired
Sep 8, 2009, 3:14 PM EDT
In force
35 min
Issued by
NWS Jackson, KY
Area
Storm-based polygon

Counties Bath County, KY, Menifee County, KY, Montgomery County, KY, Powell County, KY

The radar

The Jackson,KY radar (KJKL), 60 km from the middle of the area, began a volume at 18:39 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, 6.7 hours before the alert went out and 160 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 2009-09-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 388 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 2009-09-08The 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
388 J/kg
Mixed-layer CIN
-9 J/kg
Mixed-layer LCL
509 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
13 m²/s²
0-3 km storm-relative helicity
25 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 Sep 8, 2:39 PM EDT, 0 minutes earlier.

Area forecast discussion, Sep 8, 2:39 PM EDT, 0 minutes before
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Hazardous weather outlook, Sep 8, 11:45 AM EDT, 2 hours 54 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE JACKSON KY
1145 AM EDT TUE SEP 8 2009

KYZ044-050>052-058>060-068-069-079-080-083>088-104-106>120-091100-
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-
1145 AM EDT TUE SEP 8 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EASTERN KENTUCKY.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

ISOLATED TO SCATTERED THUNDERSTORMS ARE EXPECTED TODAY AND TONIGHT.
LOCALLY HEAVY RAIN IS POSSIBLE AS THUNDERSTORMS WILL BE SLOW MOVING
AND COULD REPEATEDLY MOVE OVER THE SAME LOCATIONS. IN ADDITION...A
FEW THUNDERSTORMS COULD PRODUCE GUSTY WINDS AND POSSIBLY SMALL HAIL.

PATCHY DENSE FOG WILL LIKELY DEVELOP LATE TONIGHT THROUGH DAWN ON
WEDNESDAY...DROPPING VISIBILITIES BELOW ONE QUARTER MILE AT TIMES.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

THUNDERSTORMS ARE POSSIBLE AT TIMES FROM WEDNESDAY THROUGH FRIDAY
EVENING...AND THEN AGAIN ON MONDAY. SOME THUNDERSTORMS ON WEDNESDAY
COULD PRODUCE LOCALLY HEAVY RAIN.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED.

JP/RAY

In the hours before

Special weather statement, Sep 8, 1:31 PM EDT, 1 hour 8 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON KY
131 PM EDT TUE SEP 8 2009

KYZ044-050>052-081830-
FLEMING-ROWAN-BATH-MONTGOMERY-
131 PM EDT TUE SEP 8 2009

...A CLUSTER OF STRONG THUNDERSTORMS TO AFFECT THE FOLLOWING COUNTIES
THROUGH 230 PM EDT TUESDAY AFTERNOON...

   FLEMING...
   ROWAN...
   BATH AND
   NORTHERN MONTGOMERY.

AT 131 PM EDT...A CLUSTER OF SHOWERS AND STRONG THUNDERSTORMS WAS
LOCATED NEAR OWINGSVILLE...MOVING EAST AT 15 MPH.

LOCATIONS AFFECTED INCLUDE...BUT ARE NOT LIMITED TO...WYOMING AROUND
140 PM EDT...GRANGE CITY AROUND 145 PM EDT...RAMEY AROUND 200 PM EDT
AND SHARKEY AROUND 205 PM EDT...AND MOREHEAD AROUND 215 PM.

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.

RAY
Local storm report, Sep 8, 2:07 PM EDT, 32 minutes before
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Special weather statement, Sep 8, 2:12 PM EDT, 27 minutes before
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Local storm report, Sep 8, 2:21 PM EDT, 18 minutes before
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Special weather statement, Sep 8, 2:26 PM EDT, 13 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Sep 7, 10:30 PM EDTDense Fog AdvisoryJKLBath, Bell, Breathitt, Clay, Elliott, Estill and 27 more12 hr
Sep 8, 1:44 PM EDTAreal Flood AdvisoryJKLBath2 hr
Sep 8, 1:51 PM EDTSevere Thunderstorm WarningJKLBath39 min
Sep 8, 3:23 PM EDTSevere Thunderstorm WarningJKLEstill, Jackson, Lee, Owsley, Powell, Wolfe52 min
Sep 8, 3:38 PM EDTSevere Thunderstorm WarningJKLBreathitt, Perry52 min
Sep 8, 4:13 PM EDTSevere Thunderstorm WarningJKLBreathitt, Clay, Jackson, Owsley, Perry47 min
Sep 8, 4:22 PM EDTAreal Flood AdvisoryJKLBreathitt, Clay, Jackson, Lee, Owsley, Perry101 min
Sep 8, 4:59 PM EDTSevere Thunderstorm WarningJKLClay, Leslie, Owsley, Perry46 min
Sep 8, 5:09 PM EDTSevere Thunderstorm WarningJKLFloyd, Knott31 min

Nearby

Severe Thunderstorm Warnings in Kentucky, 2009Every severe thunderstorm warning in 2009

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.