Alert archive / Kentucky / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 111, NWS Louisville, KY

August 24, 1999Casey County, Kentucky

NWS Louisville, KY issued this severe thunderstorm warning at Aug 24, 1999, 5:18 PM EDT for Casey County, Kentucky. It was in force for 32 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Aug 24, 1999, 5:18 PM EDT (21:18 UTC)
Expired: Aug 24, 1999, 5:50 PM EDT
In force: 32 min
Issued by: NWS Louisville, KY
Area: Whole counties

County Casey County, KY

What was reported inside it

Time	Report	Where	Remark
Aug 24, 5:35 PM EDT	Thunderstorm Wind 50	Clementsville, KY	Trees down on Highway 70 near Clementsville

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 9.3 hours before the alert went out and 199 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: 975 J/kg
Mixed-layer CIN: -56 J/kg
Mixed-layer LCL: 742 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 184 m²/s²
0-3 km storm-relative helicity: 175 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 4.7

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 Louisville, KY wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 24, 3:00 PM EDT, 2 hours 18 minutes earlier.

Area forecast discussion, Aug 24, 3:00 PM EDT, 2 hours 18 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LOUISVILLE KY
300 PM EDT TUE AUG 24 1999

...FCST PRBLM TDA CENTERS ARND CHC OF PRECIP ASSCTD WITH CDFNT MOVG
INTO CNTRL KENTUCKY ERLY THIS AFTN...

CLDS UPR LO SPINNG ACRS CNTRL IL AT ERLY AFTN WITH AREA OF
SHWRS/TSTMS UNDR COLD CORE UPR LO XTNDG S INTO ERN IN.  SCND AREA OF
CONV ACRS MS/AL IN AREA OF HIER DWPTS.  KY CAUGHT IN BTWN AS COLD
FRONT VCNTY SDF AT 17Z WNDS HAV JUST SHFTD TO SW AND DWPTS WHICH
REACHED A MAX OF 70 HAV DROPPED TO 66 DEG.  LAPS DATA AT 16Z ALRDY
INDCTS BST INSTBLTY FROM SDF E.

MDLS SHW BST MOIST INTO E KY BY 00Z AS UPR LO DRIFTS SLOLY E DURING
NXT 48 HRS.  CRNT DATA SEEMS TO FAVOR NGM WHICH TAKES INSTBLTY MAX
OVR SCNTRL KY AND SPLITS IT BY 00Z WITH ONE MAX...ASSCTD WITH UPR
LO...OVR OH AND SCND MAX OVR AL.  NGM ALSO FASTED TO SHUT OFF PRECIP
WITH FRHT65 INDCTG NO PRECIP AFTR 00Z.

WILL CONCENTRATE BST CHC PRECIP OVR ECNTRL KY BUT EVEN THERE WILL
HOLD IN LKLY CAT UNLESS SOME DVLPMNT NOTED BY FCST ISSUANCE.  WILL
REDUCE POPS INTO CHC/SCT RANGE W.

ALTHO MDLS CONT TO SHW UPR LO MOVG VRY SLOLY E THRU 48 HRS KEEPG KY
IN BROAD CYCNLC FLO MOIST LACKG.  FEEL ANY ADDTNL PRECIP AFTR FROPA
WILL BE ON WED AFTN AS COLD CORE UPR LO MOVS ACRS IN.

.SDF...NONE.
RNK

In the hours before

Special weather statement, Aug 24, 11:49 AM EDT, 5 hours 29 minutes before

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Special weather statement, Aug 24, 11:50 AM EDT, 5 hours 28 minutes before

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Special weather statement, Aug 24, 11:50 AM EDT, 5 hours 28 minutes before

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<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 24, 5:05 PM EDT	Severe Thunderstorm Warning	LMK	Bourbon, Nicholas	35 min
Aug 24, 5:54 PM EDT	Severe Thunderstorm Warning	LMK	Garrard, Lincoln	31 min
Aug 24, 6:24 PM EDT	Severe Thunderstorm Warning	LMK	Adair, Metcalfe	31 min
Aug 24, 7:20 PM EDT	Severe Thunderstorm Warning	LMK	Lincoln	30 min

Nearby

Severe Thunderstorm Warnings in Kentucky, 1999 Every severe thunderstorm warning in 1999

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.