Alert archive / Kentucky / Flash Flood Warnings in 2024

Flash Flood Warning 21, NWS Wilmington, OH

August 31, 2024Mason County, Kentucky

NWS Wilmington, OH issued this flash flood warning at Aug 31, 2024, 3:55 PM EDT for Mason County, Kentucky. It was in force for 2 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
Aug 31, 2024, 3:55 PM EDT (19:55 UTC)
Expired
Aug 31, 2024, 6:15 PM EDT
In force
2 hr
Issued by
NWS Wilmington, OH
Area
Storm-based polygon
Flood severity
None

County Mason County, KY

The radar

The Cincinnati radar (KILN), 84 km from the middle of the area, began a volume at 19:56 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, 7.9 hours before the alert went out and 85 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 2024-08-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 672 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, Cncnati-Daytn, OH at 12:00Z on 2024-08-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -27 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
672 J/kg
Mixed-layer CIN
-123 J/kg
Mixed-layer LCL
1137 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
-27 m²/s²
0-3 km storm-relative helicity
-20 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

788 
WGUS51 KILN 311955
FFWILN
KYC161-312245-
/O.NEW.KILN.FF.W.0021.240831T1955Z-240831T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Wilmington OH
355 PM EDT Sat Aug 31 2024

The National Weather Service in Wilmington has issued a

* Flash Flood Warning for...
  Mason County in northern Kentucky...

* Until 645 PM EDT.

* At 355 PM EDT, radar indicated thunderstorms producing heavy rain 
  across the warned area. Between 2 and 3 inches of rain have 
  fallen. Additional rainfall amounts of 0.5 to 1 inch are possible. 
  Flash flooding is ongoing or expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that may experience flash flooding include...
  Maysville, Washington, Ripley, Aberdeen, Dover, Tuckahoe, 
  Moranburg, Murphysville, Minerva, Lowell, South Ripley and Somo. 
  This includes areas along the North Fork Licking River, Clarks 
  Run, and Brandywine Creek in western Mason County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

To report flash flooding, go to our website at weather.gov/iln and 
submit your report via social media, when you can do so safely.

&&

LAT...LON 3877 8390 3876 8386 3875 8385 3872 8384
      3870 8379 3866 8377 3865 8373 3858 8373
      3856 8387 3856 8396 3859 8397 3859 8399

FLASH FLOOD...RADAR INDICATED

$$

Hatzos
1 follow-up statement
068 
WGUS71 KILN 312215
FFSILN

Flash Flood Statement
National Weather Service Wilmington OH
615 PM EDT Sat Aug 31 2024

KYC161-312225-
/O.CAN.KILN.FF.W.0021.000000T0000Z-240831T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mason KY-
615 PM EDT Sat Aug 31 2024

...FLASH FLOOD WARNING IS CANCELLED FOR MASON COUNTY...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat. Please continue to heed any road closures.

&&

LAT...LON 3877 8390 3876 8386 3875 8385 3872 8384
      3870 8379 3866 8377 3865 8373 3858 8373
      3856 8387 3856 8396 3859 8397 3859 8399

$$

Hatzos

The office that day

Everything else NWS Wilmington, OH issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 31, 10:06 AM EDTSevere Thunderstorm WarningILNLewis, Mason24 min
Aug 31, 10:30 AM EDTSevere Thunderstorm WarningILNLewis45 min
Aug 31, 11:23 AM EDTSpecial Weather StatementILNGreenup37 min
Aug 31, 2:16 PM EDTSpecial Weather StatementILNMason, Robertson44 min
Aug 31, 3:11 PM EDTSpecial Weather StatementILNMason34 min
Aug 31, 3:34 PM EDTAreal Flood AdvisoryILNMason21 min
Aug 31, 3:38 PM EDTSpecial Weather StatementILNLewis22 min
Aug 31, 3:42 PM EDTSevere Thunderstorm WarningILNBracken, Lewis, Mason, Robertson48 min
Aug 31, 4:58 PM EDTSpecial Weather StatementILNGreenup32 min
Aug 31, 7:47 PM EDTSpecial Weather StatementILNOwen28 min

Nearby

Flash Flood Warnings in Kentucky, 2024Every flash flood warning in 2024

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.