Alert archive / Indiana / Flash Flood Warnings in 2021

Flash Flood Warning 21, NWS Wilmington, OH

July 16, 2021Dearborn County, Franklin County, Ripley County, Indiana

NWS Wilmington, OH issued this flash flood warning at Jul 16, 2021, 9:01 PM EDT for Dearborn County, Franklin County, Ripley County, Indiana. It was in force for 2 hr. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 16, 2021, 9:01 PM EDT (01:01 UTC)
Expired: Jul 16, 2021, 11:19 PM EDT
In force: 2 hr
Issued by: NWS Wilmington, OH
Area: Storm-based polygon
Flood severity: None

Counties Dearborn County, IN, Franklin County, IN, Ripley County, IN

The radar

The Cincinnati radar (KILN), 101 km from the middle of the area, began a volume at 01:02 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.

What was reported inside it

Time	Report	Where	Remark
Jul 16, 9:12 PM EDT	FLASH FLOOD	2 Nw Brookville, IN	WATER FLOWING OVER ROADWAY AND CARRYING DEBRIS.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 00:00Z, 1.0 hours before the alert went out and 103 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: 163 J/kg
Mixed-layer CIN: -108 J/kg
Mixed-layer LCL: 1176 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 157 m²/s²
0-3 km storm-relative helicity: 168 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.2

Open this sounding in Storm Lab

The text

As transmitted.

218 
WGUS51 KILN 170101
FFWILN
INC029-047-137-170400-
/O.NEW.KILN.FF.W.0021.210717T0101Z-210717T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Wilmington OH
901 PM EDT Fri Jul 16 2021

The National Weather Service in Wilmington has issued a

* Flash Flood Warning for...
  Northern Dearborn County in southeastern Indiana...
  Eastern Franklin County in southeastern Indiana...
  Northeastern Ripley County in southeastern Indiana...

* Until midnight EDT.

* At 901 PM EDT, radar indicated thunderstorms producing heavy rain 
  across the warned area. Between 3 and 4 inches of rain have 
  fallen. Additional rainfall amounts of 1 to 2 inches are possible 
  in the warned area. 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...
  Batesville, Brookville, Sunman, St. Leon, Cedar Grove, Mount 
  Carmel, Saint Peter, Lawrenceville, New Trenton, New Alsace, 
  Sharptown, Interstate 74 at State Route 101, Penntown, Weisburg, 
  Mounds State Recreation Area, Rockdale and Mixersville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Move to higher ground now. Act quickly to protect your life.

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

&&

LAT...LON 3952 8498 3952 8482 3930 8482 3918 8509
      3918 8526

FLASH FLOOD...RADAR INDICATED

$$

ch

1 follow-up statement

896 
WGUS71 KILN 170319
FFSILN

Flash Flood Statement
National Weather Service Wilmington OH
1119 PM EDT Fri Jul 16 2021

INC029-047-137-170329-
/O.CAN.KILN.FF.W.0021.000000T0000Z-210717T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Dearborn IN-Franklin IN-Ripley IN-
1119 PM EDT Fri Jul 16 2021

...FLASH FLOOD WARNING IS CANCELLED FOR NORTHERN DEARBORN, EASTERN 
FRANKLIN IN AND NORTHEASTERN RIPLEY COUNTIES IN SOUTHEASTERN 
INDIANA...

Flash flooding has ended across the area, but flooding continues. 
Therefore the flash flood warning has been replaced by a flood 
warning. Please refer to that bulletin for more information.

A Flash Flood Watch remains in effect until 200 PM EDT Saturday for 
portions of Indiana, Northern Kentucky and Ohio.

LAT...LON 3952 8498 3952 8482 3930 8482 3918 8509
      3918 8526

$$

ch

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 16, 8:25 PM EDT	Areal Flood Advisory	ILN	Dearborn, Franklin, Ripley	3 hr
Jul 16, 8:46 PM EDT	Areal Flood Advisory	ILN	Franklin, Union	3 hr
Jul 16, 9:32 PM EDT	Areal Flood Advisory	ILN	Ripley	2 min
Jul 16, 9:34 PM EDT	Flash Flood Warning	ILN	Ripley	106 min
Jul 16, 10:15 PM EDT	Special Weather Statement	ILN	Ohio, Switzerland	30 min
Jul 16, 10:33 PM EDT	Areal Flood Advisory	ILN	Dearborn, Ohio, Switzerland	3 hr
Jul 16, 11:15 PM EDT	Areal Flood Warning	ILN	Dearborn, Franklin, Ripley	9 hr
Jul 16, 11:30 PM EDT	Areal Flood Warning	ILN	Union	9 hr
Jul 17, 12:16 AM EDT	Areal Flood Advisory	ILN	Switzerland	3 hr
Jul 17, 5:49 AM EDT	River Flood Advisory	ILN	Dearborn, Franklin	3 hr
Jul 17, 8:31 AM EDT	Areal Flood Advisory	ILN	Ripley	6 hr

Nearby

Flash Flood Warnings in Indiana, 2021 Every flash flood warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.