Alert archive / Kentucky / Flash Flood Watches in 2014

Flash Flood Watch 1, NWS Louisville, KY

February 20, 201415 counties in Kentucky; 5 counties in Indiana

NWS Louisville, KY issued this flash flood watch at Feb 20, 2014, 4:10 AM EST for 15 counties in Kentucky; 5 counties in Indiana. It took effect at Feb 20, 2014, 4:00 PM EST. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued
Feb 20, 2014, 4:10 AM EST (09:10 UTC)
In effect from
Feb 20, 2014, 4:00 PM EST
Expired
Feb 20, 2014, 11:51 PM EST
In force
8 hr
Issued by
NWS Louisville, KY
Flood severity
None

Counties Clark County, IN, Floyd County, IN, Jefferson County, IN, Scott County, IN, Washington County, IN, Anderson County, KY, Bourbon County, KY, Clark County, KY, Fayette County, KY, Franklin County, KY, Harrison County, KY, Henry County, KY, Jefferson County, KY, Nicholas County, KY, Oldham County, KY, Scott County, KY, Shelby County, KY, Spencer County, KY, Trimble County, KY, Woodford County, KY

The radar

The Louisville radar (KLVX), 86 km from the middle of the area, began a volume at 09:09 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 00:00Z, 9.2 hours before the alert went out and 278 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, Nashville Metro, TN at 00:00Z on 2014-02-20Temperature 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°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Nashville Metro, TN at 00:00Z on 2014-02-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 222 square meters per square second.1939587897Sfc1 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
1918 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
222 m²/s²
0-3 km storm-relative helicity
203 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 flash flood watch 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 flash flood watch went out at Feb 20, 3:33 AM EST, 37 minutes earlier.

Area forecast discussion, Feb 20, 3:33 AM EST, 37 minutes before
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Hazardous weather outlook, Feb 19, 10:31 PM EST, 5 hours 39 minutes before
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</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.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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The office that day

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

IssuedProductOfficeCountiesLasted
Feb 20, 6:20 PM ESTSevere Thunderstorm WarningLMKButler, Logan, Ohio30 min
Feb 20, 6:48 PM ESTSpecial Weather StatementLMKButler, Grayson32 min

Nearby

Flash Flood Watches in Kentucky, 2014Flash Flood Watches in Indiana, 2014Every flash flood watch in 2014

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.