Alert archive / Kentucky / Special Weather Statements in 2021

Special Weather Statement, NWS Louisville, KY

May 4, 2021Logan County, Kentucky

NWS Louisville, KY issued this special weather statement at May 4, 2021, 9:00 PM CDT for Logan County, Kentucky. It was in force for 30 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
May 4, 2021, 9:00 PM CDT (02:00 UTC)
Expired
May 4, 2021, 9:30 PM CDT
In force
30 min
Issued by
NWS Louisville, KY

County Logan County, KY

The radar

The Ft Campbell radar (KHPX), 40 km from the middle of the area, began a volume at 02:00 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, 2.0 hours before the alert went out and 101 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 2021-05-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 539 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, Nashville Metro, TN at 00:00Z on 2021-05-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 102 square meters per square second.1939587897117Sfc1 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
539 J/kg
Mixed-layer CIN
-32 J/kg
Mixed-layer LCL
815 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
102 m²/s²
0-3 km storm-relative helicity
244 m²/s²
Significant tornado parameter
0.2
Supercell composite
2.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at May 4, 8:37 PM CDT, 23 minutes earlier.

Area forecast discussion, May 4, 8:37 PM CDT, 23 minutes before
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Hazardous weather outlook, May 4, 1:57 PM CDT, 7 hours 3 minutes before
Hazardous Weather Outlook
National Weather Service Louisville KY
257 PM EDT Tue May 4 2021

INZ076>079-083-084-089>092-KYZ023>043-045>049-053>057-065>067-051900-
Orange-Washington-Scott-Jefferson-Dubois-Crawford-Perry-Harrison-
Floyd-Clark-Hancock-Breckinridge-Meade-Ohio-Grayson-Hardin-Bullitt-
Oldham-Trimble-Henry-Shelby-Franklin-Spencer-Anderson-Woodford-
Fayette-Bourbon-Nicholas-Nelson-Mercer-Jessamine-Larue-Marion-Boyle-
Garrard-Madison-Taylor-Casey-Lincoln-
Including the cities of Paoli, Salem, Scottsburg, Madison, Jasper,
English, Tell City, Corydon, New Albany, Jeffersonville, Lewisport,
Hawesville, Hardinsburg, Brandenburg, Hartford, Leitchfield,
Elizabethtown, Shepherdsville, Louisville, La Grange, Bedford,
Milton, New Castle, Shelbyville, Frankfort, Georgetown, Cynthiana,
Taylorsville, Lawrenceburg, Versailles, Lexington, Paris, Carlisle,
Bardstown, Springfield, Harrodsburg, Nicholasville, Winchester,
Hodgenville, Lebanon, Danville, Lancaster, Richmond, Campbellsville,
Liberty, and Stanford
257 PM EDT Tue May 4 2021 /157 PM CDT Tue May 4 2021/

This hazardous weather outlook is for portions of south central
Indiana and Central Kentucky.

.DAY ONE...Tonight.

Another round of thunderstorms is likely this evening and the
overnight hours. Some of the storms may be strong to severe, with
damaging winds and large hail being the main threats. Isolated flash
flooding will be possible in areas where storms repeatedly occur.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotters are requested to report instances of severe weather to the
National Weather Service.

KYZ061>064-070>078-081-082-051900-
Butler-Edmonson-Hart-Green-Logan-Warren-Simpson-Allen-Barren-Monroe-
Metcalfe-Adair-Russell-Cumberland-Clinton-
Including the cities of Morgantown, Brownsville, Horse Cave,
Greensburg, Russellville, Bowling Green, Franklin, Providence,
Scottsville, Glasgow, Tompkinsville, Edmonton, Columbia, Jamestown,
Burkesville, and Albany
157 PM CDT Tue May 4 2021

...FLASH FLOOD WATCH IN EFFECT THROUGH LATE TONIGHT...

This hazardous weather outlook is for portions of south central
Indiana and Central Kentucky.

.DAY ONE...Tonight.

Another round of thunderstorms is likely this evening and the
overnight hours. Some of the storms may be strong to severe, with
damaging winds and large hail being the main threats.

Additionally, flash flooding will be a threat with storms tonight.
Soils are already very saturated from rainfall this morning, and it
will not take much rain to result in flooding issues.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotters are requested to report instances of severe weather and
flooding to the National Weather Service.

DM/BTN

In the hours before

Special weather statement, May 4, 8:08 PM CDT, 52 minutes before
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Special weather statement, May 4, 8:14 PM CDT, 46 minutes before
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Special weather statement, May 4, 8:29 PM CDT, 31 minutes before
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Local storm report, May 4, 8:47 PM CDT, 13 minutes before
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Local storm report, May 4, 8:55 PM CDT, 5 minutes before
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Special weather statement, May 4, 9:00 PM CDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
May 4, 7:09 PM CDTSpecial Weather StatementLMKMarion, Washington36 min
May 4, 7:10 PM CDTSpecial Weather StatementLMKLogan35 min
May 4, 7:14 PM CDTTornado WarningLMKMarion, Washington31 min
May 4, 7:20 PM CDTSpecial Weather StatementLMKEdmonson, Warren40 min
May 4, 7:30 PM CDTFlash Flood WarningLMKBarren, Edmonson, Logan, Warren4 hr
May 4, 7:36 PM CDTSevere Thunderstorm WarningLMKWashington24 min
May 4, 7:46 PM CDTSpecial Weather StatementLMKLarue29 min
May 4, 7:55 PM CDTSpecial Weather StatementLMKMercer35 min
May 4, 8:02 PM CDTSpecial Weather StatementLMKButler13 min
May 4, 8:08 PM CDTSpecial Weather StatementLMKHart37 min
May 4, 8:14 PM CDTSpecial Weather StatementLMKMarion31 min
May 4, 8:18 PM CDTSevere Thunderstorm WarningLMKLarue, Marion, Nelson27 min
May 4, 8:29 PM CDTSpecial Weather StatementLMKJessamine61 min
May 4, 8:45 PM CDTFlash Flood WarningLMKButler, Logan3 hr
May 4, 11:36 PM CDTAreal Flood WarningLMKButler, Logan5 hr
May 5, 6:59 AM CDTRiver Flood AdvisoryLMKHart3 hr
May 5, 9:22 AM CDTRiver Flood AdvisoryLMKHardin, Nelson16 hr
May 5, 10:26 AM CDTRiver Flood WarningLMKHart7 hr
May 5, 3:08 PM CDTRiver Flood AdvisoryLMKBourbon10 hr

Nearby

Special Weather Statements in Kentucky, 2021Every special weather statement in 2021

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.