Alert archive / Indiana / Flash Flood Warnings in 2011

Flash Flood Warning 7, NWS Wilmington, OH

April 23, 2011Dearborn County, Ripley County, Indiana

NWS Wilmington, OH issued this flash flood warning at Apr 23, 2011, 2:03 AM EDT for Dearborn County, Ripley County, Indiana. 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: Apr 23, 2011, 2:03 AM EDT (06:03 UTC)
Expired: Apr 23, 2011, 5:00 AM EDT
In force: 3 hr
Issued by: NWS Wilmington, OH
Area: Storm-based polygon
Flood severity: None

Counties Dearborn County, IN, Ripley County, IN

The radar

The Cincinnati radar (KILN), 118 km from the middle of the area, began a volume at 06:06 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, 6.1 hours before the alert went out and 120 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: 565 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 147 m²/s²
0-3 km storm-relative helicity: 265 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

818 
WGUS51 KILN 230603
FFWILN
INC029-137-230900-
/O.NEW.KILN.FF.W.0007.110423T0603Z-110423T0900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE WILMINGTON OH
203 AM EDT SAT APR 23 2011

THE NATIONAL WEATHER SERVICE IN WILMINGTON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  DEARBORN COUNTY IN SOUTHEAST INDIANA...
  RIPLEY COUNTY IN SOUTHEAST INDIANA...

* UNTIL 500 AM EDT.

* AT 158 AM EDT...RADAR INDICATED THAT THUNDERSTORMS HAD PRODUCED    
  HEAVY RAINFALL ACROSS THE WARNED AREA. RADAR ESTIMATED UP TO AN    
  INCH OF RAIN HAS FALLEN SINCE MIDNIGHT.

* HEAVY RAIN CONTINUES TO FALL ACROSS THE WARNED AREA WITH ANOTHER   
  ONE TO TWO INCHES POSSIBLE THROUGH 500 AM EDT. RUNOFF FROM THIS    
  EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO OCCUR.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...AURORA...
BATESVILLE...BRIGHT...GREENDALE...HIDDEN VALLEY...LAWRENCEBURG...
DILLSBORO...MILAN...MOORES HILL...OSGOOD AND VERSAILLES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

NEVER DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. ONLY A FEW INCHES
OF RAPIDLY FLOWING WATER CAN QUICKLY CARRY AWAY YOUR VEHICLE. FIND AN
ALTERNATE ROUTE OR WAIT UNTIL THE WATER RECEDES.

FLOOD DANGERS ARE HARDER TO RECOGNIZE AT NIGHT. BE ESPECIALLY
CAUTIOUS.

&&

LAT...LON 3920 8544 3931 8522 3930 8482 3911 8482
      3906 8490 3903 8488 3901 8490 3899 8500
      3895 8506 3896 8507 3894 8512 3896 8512
      3893 8514 3893 8520 3891 8521 3891 8545

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 23, 1:08 AM EDT	Areal Flood Advisory	ILN	Dearborn, Franklin, Ohio, Ripley, Switzerland	5 hr
Apr 23, 1:59 AM EDT	Tornado Warning	ILN	Dearborn, Ripley	31 min
Apr 23, 2:21 AM EDT	Flash Flood Warning	ILN	Ohio	3 hr
Apr 23, 5:59 AM EDT	Areal Flood Advisory	ILN	Dearborn, Franklin, Ohio, Ripley, Switzerland	7 hr
Apr 23, 12:51 PM EDT	Areal Flood Advisory	ILN	Dearborn, Franklin, Ohio, Ripley, Switzerland	6 hr
Apr 23, 1:36 PM EDT	Special Weather Statement	ILN	Ohio, Switzerland	39 min
Apr 23, 1:45 PM EDT	Flash Flood Warning	ILN	Dearborn, Franklin, Ohio, Ripley, Switzerland	8 hr
Apr 23, 2:35 PM EDT	Special Weather Statement	ILN	Switzerland	40 min
Apr 23, 2:53 PM EDT	Severe Thunderstorm Warning	ILN	Switzerland	37 min
Apr 23, 5:27 PM EDT	River Flood Warning	ILN	Switzerland	5 days

Nearby

Flash Flood Warnings in Indiana, 2011 Every flash flood warning in 2011

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.