Alert archive / Ohio / Flash Flood Warnings in 2011

Flash Flood Warning 45, NWS Wilmington, OH

August 9, 20114 counties in Ohio

NWS Wilmington, OH issued this flash flood warning at Aug 9, 2011, 12:17 AM EDT for 4 counties in Ohio. It was in force for 102 min. 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 9, 2011, 12:17 AM EDT (04:17 UTC)
Expired: Aug 9, 2011, 1:59 AM EDT
In force: 102 min
Issued by: NWS Wilmington, OH
Area: Storm-based polygon
Flood severity: None

Counties Auglaize County, OH, Hardin County, OH, Logan County, OH, Shelby County, OH

The radar

The Cincinnati radar (KILN), 133 km from the middle of the area, began a volume at 04:19 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, 4.3 hours before the alert went out and 133 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: 861 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 1256 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 46 m²/s²
0-3 km storm-relative helicity: 65 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.8

Open this sounding in Storm Lab

The text

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

892 
WGUS51 KILN 090417
FFWILN
OHC011-065-091-149-090715-
/O.NEW.KILN.FF.W.0045.110809T0417Z-110809T0715Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE WILMINGTON OH
1217 AM EDT TUE AUG 9 2011

THE NATIONAL WEATHER SERVICE IN WILMINGTON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  AUGLAIZE COUNTY IN WEST CENTRAL OHIO...
  SOUTHWESTERN HARDIN COUNTY IN WEST CENTRAL OHIO...
  NORTHWESTERN LOGAN COUNTY IN WEST CENTRAL OHIO...
  NORTHERN SHELBY COUNTY IN WEST CENTRAL OHIO...

* UNTIL 315 AM EDT.

* AT 1211 AM EDT...RADAR INDICATED THAT THUNDERSTORMS HAD PRODUCED   
HEAVY RAINFALL ACROSS THE WARNED AREA. RADAR ESTIMATED 2 TO 3 INCHES 
OF RAIN HAD FALLEN FROM NEW KNOXVILLE TO ROUNDHEAD SINCE 11 PM. 

* HEAVY RAIN CONTINUES TO FALL ACROSS THE WARNED AREA WITH ANOTHER   
1 TO 2 INCHES POSSIBLE THROUGH 230 AM EDT. RUNOFF FROM THIS   
EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO OCCUR.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...ST. MARYS...
WAPAKONETA...BOTKINS...NEW BREMEN...NEW KNOXVILLE AND WAYNESFIELD.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4072 8371 4054 8364 4039 8445 4057 8445
      4065 8404 4065 8389 4068 8389

$$

1 follow-up statement

293 
WGUS71 KILN 090559
FFSILN

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE WILMINGTON OH
159 AM EDT TUE AUG 9 2011

OHC011-065-091-149-090610-
/O.CAN.KILN.FF.W.0045.000000T0000Z-110809T0715Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
AUGLAIZE OH-HARDIN OH-LOGAN OH-SHELBY OH-
159 AM EDT TUE AUG 9 2011

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR NORTHERN SHELBY...
NORTHWESTERN LOGAN...SOUTHWESTERN HARDIN AND AUGLAIZE COUNTIES HAS
BEEN CANCELLED...

STREAMS AND CREEKS IN THE WARNED AREA HAVE RECEDED OR WERE BEGINNING
TO RECEDE...ENDING THE FLOOD THREAT. IF FLOODING HAS BEEN OBSERVED...
PLEASE REPORT IT TO YOUR LOCAL LAW ENFORCEMENT AGENCY.

LAT...LON 4072 8371 4054 8364 4039 8445 4057 8445
      4065 8404 4065 8389 4068 8389

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 8, 8:12 PM EDT	Special Weather Statement	ILN	Hamilton	33 min
Aug 8, 8:45 PM EDT	Special Weather Statement	ILN	Clinton, Warren	30 min
Aug 8, 8:48 PM EDT	Special Weather Statement	ILN	Clermont	42 min
Aug 8, 9:20 PM EDT	Special Weather Statement	ILN	Fayette	40 min
Aug 8, 9:30 PM EDT	Special Weather Statement	ILN	Highland	30 min
Aug 8, 10:00 PM EDT	Special Weather Statement	ILN	Ross	30 min
Aug 8, 10:58 PM EDT	Special Weather Statement	ILN	Ross	62 min
Aug 8, 11:38 PM EDT	Areal Flood Advisory	ILN	Champaign, Logan, Miami, Shelby	112 min
Aug 8, 11:43 PM EDT	Areal Flood Advisory	ILN	Auglaize, Hardin, Mercer, Shelby	2 hr
Aug 9, 12:06 AM EDT	Areal Flood Advisory	ILN	Union	114 min
Aug 9, 6:42 PM EDT	Special Weather Statement	ILN	Allen	63 min
Aug 9, 6:52 PM EDT	Severe Thunderstorm Warning	ILN	Auglaize, Mercer	38 min
Aug 9, 7:19 PM EDT	Severe Thunderstorm Warning	ILN	Auglaize, Hardin, Logan, Shelby	41 min
Aug 9, 7:28 PM EDT	Special Weather Statement	ILN	Mercer	32 min
Aug 9, 7:45 PM EDT	Special Weather Statement	ILN	Shelby	30 min
Aug 9, 7:52 PM EDT	Severe Thunderstorm Warning	ILN	Hardin, Logan, Union	38 min
Aug 9, 7:58 PM EDT	Special Weather Statement	ILN	Auglaize, Shelby	32 min

Nearby

Flash Flood Warnings in Ohio, 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.