Alert archive / Kentucky / Flash Flood Warnings in 2020

Flash Flood Warning 21, NWS Jackson, KY

July 26, 2020Wayne County, Kentucky

NWS Jackson, KY issued this flash flood warning at Jul 26, 2020, 6:32 PM EDT for Wayne County, Kentucky. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 26, 2020, 6:32 PM EDT (22:32 UTC)
Expired
Jul 26, 2020, 9:03 PM EDT
In force
3 hr
Issued by
NWS Jackson, KY
Area
Storm-based polygon
Flood severity
None

County Wayne County, KY

The radar

The Knoxville radar (KMRX), 153 km from the middle of the area, began a volume at 22:34 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 12:00Z, 10.5 hours before the alert went out and 166 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 12:00Z on 2020-07-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 754 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Nashville Metro, TN at 12:00Z on 2020-07-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -22 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
754 J/kg
Mixed-layer CIN
-86 J/kg
Mixed-layer LCL
1084 m above ground
0-6 km bulk shear
1 kt
0-1 km storm-relative helicity
-22 m²/s²
0-3 km storm-relative helicity
-11 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

147 
WGUS53 KJKL 262232
FFWJKL
KYC231-270130-
/O.NEW.KJKL.FF.W.0021.200726T2232Z-200727T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service JACKSON KY
632 PM EDT Sun Jul 26 2020

The National Weather Service in JACKSON KY has issued a

* Flash Flood Warning for...
  West central Wayne County in south central Kentucky...

* Until 930 PM EDT.

* At 631 PM EDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Up to two inches of rain have
  already fallen. Flash flooding is ongoing or expected to begin
  shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar indicated.

  IMPACT...Flooding of small creeks and streams, urban areas, 
           highways, streets and underpasses as well as other 
           drainage and low lying areas.

* Some locations that will experience flooding include...
  Susie, Zula and Hidalgo. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.

&&

LAT...LON 3683 8493 3674 8486 3670 8493 3679 8500

FLASH FLOOD...RADAR INDICATED

$$

JP
2 follow-up statements
773 
WGUS73 KJKL 270029
FFSJKL

Flash Flood Statement
National Weather Service JACKSON KY
829 PM EDT Sun Jul 26 2020

KYC231-270130-
/O.CON.KJKL.FF.W.0021.000000T0000Z-200727T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Wayne KY-
829 PM EDT Sun Jul 26 2020

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 930 PM EDT FOR
WEST CENTRAL WAYNE COUNTY...

At 824 PM EDT, doppler radar indicated that heavy rain has ended 
across the warned area. However, runoff from the radar estimated 2 to 
3 inches that fell between Susie and Hidalgo continues. This could 
still lead to flash flooding near Susie and Hidalgo.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar indicated.

IMPACT...Flooding of small creeks and streams, urban areas, 
         highways, streets and underpasses as well as other drainage 
         and low lying areas.

Some locations that will experience flooding include...
Susie, Zula and Hidalgo. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.

&&

LAT...LON 3683 8493 3674 8486 3670 8493 3679 8500

FLASH FLOOD...RADAR INDICATED

$$

JP
453 
WGUS73 KJKL 270103
FFSJKL

Flash Flood Statement
National Weather Service JACKSON KY
903 PM EDT Sun Jul 26 2020

KYC231-270112-
/O.CAN.KJKL.FF.W.0021.000000T0000Z-200727T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Wayne KY-
903 PM EDT Sun Jul 26 2020

...THE FLASH FLOOD WARNING FOR WEST CENTRAL WAYNE COUNTY IS
CANCELLED...

Flood waters have receded. Flooding is no longer expected to pose a
threat. Please continue to heed any remaining road closures.

LAT...LON 3683 8493 3674 8486 3670 8493 3679 8500

$$

JP

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 26, 4:59 PM EDTAreal Flood AdvisoryJKLPulaski2 hr
Jul 26, 6:02 PM EDTSpecial Weather StatementJKLMcCreary43 min
Jul 26, 6:08 PM EDTAreal Flood AdvisoryJKLMcCreary2 hr
Jul 26, 7:29 PM EDTAreal Flood AdvisoryJKLPulaski2 hr

Nearby

Flash Flood Warnings in Kentucky, 2020Every flash flood warning in 2020

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.