Alert archive / Ohio / Flash Flood Warnings in 2020

Flash Flood Warning 49, NWS Charleston, WV

August 3, 2020Jackson County, Ohio

NWS Charleston, WV issued this flash flood warning at Aug 3, 2020, 9:49 PM EDT for Jackson County, Ohio. 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 3, 2020, 9:49 PM EDT (01:49 UTC)
Expired: Aug 4, 2020, 12:00 AM EDT
In force: 2 hr
Issued by: NWS Charleston, WV
Area: Storm-based polygon
Flood severity: None

County Jackson County, OH

The radar

The Cincinnati radar (KILN), 101 km from the middle of the area, began a volume at 01:48 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 00:00Z, 1.8 hours before the alert went out and 99 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1171 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: -119 m²/s²
0-3 km storm-relative helicity: -110 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted.

502 
WGUS51 KRLX 040149
FFWRLX
OHC079-040400-
/O.NEW.KRLX.FF.W.0049.200804T0149Z-200804T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Charleston WV
949 PM EDT Mon Aug 3 2020

The National Weather Service in Charleston has issued a

* Flash Flood Warning for...
  Northwestern Jackson County in southeastern Ohio...

* Until midnight EDT.

* At 949 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 2 and 3 inches of rain 
  have fallen with an additional inch possible over the next hour. 
  Flash flooding is ongoing or expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Doppler radar.

  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 flash flooding include...
  mainly rural areas of Northwestern Jackson County

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be especially cautious at night when it is harder to recognize the 
dangers of flooding.

Excessive runoff from heavy rainfall will cause flooding of small 
creeks and streams, country roads, farmland, and other low lying 
spots.

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

&&

LAT...LON 3919 8264 3918 8265 3915 8265 3913 8266
      3907 8272 3906 8275 3905 8280 3917 8279
      3917 8277 3918 8277 3921 8272 3920 8265
      3919 8265

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-1.5 INCHES IN 1 HOUR 

$$

HART

1 follow-up statement

055 
WGUS71 KRLX 040358
FFSRLX

Flash Flood Statement
National Weather Service Charleston WV
1158 PM EDT Mon Aug 3 2020

OHC079-040408-
/O.EXP.KRLX.FF.W.0049.000000T0000Z-200804T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Jackson OH-
1158 PM EDT Mon Aug 3 2020

...FLASH FLOOD WARNING WILL EXPIRE AT MIDNIGHT EDT TONIGHT FOR 
NORTHWESTERN JACKSON COUNTY...

The heaviest of the rain has ended. Flooding is no longer expected 
to pose a threat. Please continue to heed remaining road closures.

LAT...LON 3919 8264 3918 8265 3915 8265 3913 8266
      3907 8272 3906 8275 3905 8280 3917 8279
      3917 8277 3918 8277 3921 8272 3920 8265
      3919 8265

$$

RG

The office that day

Everything else NWS Charleston, WV issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 3, 9:18 PM EDT	Special Weather Statement	RLX	Jackson	42 min
Aug 3, 9:56 PM EDT	Areal Flood Warning	RLX	Perry	3 hr
Aug 3, 10:28 PM EDT	Severe Thunderstorm Warning	RLX	Lawrence	32 min

Nearby

Flash Flood Warnings in Ohio, 2020 Every 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.