Alert archive / Ohio / Flash Flood Warnings in 2012

Flash Flood Warning 4, NWS Wilmington, OH

March 18, 2012Franklin County, Madison County, Ohio

NWS Wilmington, OH issued this flash flood warning at Mar 18, 2012, 7:25 PM EDT for Franklin County, Madison County, Ohio. It was in force for 3 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: Mar 18, 2012, 7:25 PM EDT (23:25 UTC)
Expired: Mar 18, 2012, 10:30 PM EDT
In force: 3 hr
Issued by: NWS Wilmington, OH
Area: Storm-based polygon
Flood severity: None

Counties Franklin County, OH, Madison County, OH

The radar

The Cincinnati radar (KILN), 96 km from the middle of the area, began a volume at 23:26 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
Mar 18, 7:30 PM EDT	FLOOD	Dublin, OH	STREET FLOODING / PONDING OF WATER IN LOW LYING AREAS

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 12:00Z, 11.4 hours before the alert went out and 94 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: 429 J/kg
Mixed-layer CIN: -69 J/kg
Mixed-layer LCL: 1015 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 123 m²/s²
0-3 km storm-relative helicity: 106 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

859 
WGUS51 KILN 182325
FFWILN
OHC049-097-190230-
/O.NEW.KILN.FF.W.0004.120318T2325Z-120319T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE WILMINGTON OH
725 PM EDT SUN MAR 18 2012

THE NATIONAL WEATHER SERVICE IN WILMINGTON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  FRANKLIN COUNTY IN CENTRAL OHIO...
  NORTHEASTERN MADISON COUNTY IN CENTRAL OHIO...

* UNTIL 1030 PM EDT.

* AT 719 PM EDT...RADAR INDICATED THAT THUNDERSTORMS HAD PRODUCED   
HEAVY RAINFALL ACROSS THE WARNED AREA. RADAR ESTIMATED UP TO 2.5 
INCHES OF RAIN ACROSS NORTHEAST MADISON AND FRANKLIN COUNTIES.

* HEAVY RAIN CONTINUES TO FALL ACROSS THE WARNED AREA WITH ANOTHER   
  1 TO 2 INCHES POSSIBLE THROUGH 1030 PM EDT. RUNOFF FROM THIS
  EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO OCCUR.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...BEXLEY...
COLUMBUS...DUBLIN...GAHANNA...HILLIARD...REYNOLDSBURG...UPPER
ARLINGTON...WORTHINGTON AND MINERVA PARK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

ACT QUICKLY TO PROTECT YOUR LIFE IF YOU ARE IN A LOW LYING AREA...
ALONG A CREEK...STREAM OR IN AN AREA EXPERIENCING FLOODING. MOVE TO
HIGHER GROUND IMMEDIATELY.

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.

&&

LAT...LON 3994 8280 3994 8281 3991 8280 3986 8281
      3997 8322 4011 8334 4010 8321 4011 8320
      4011 8317 4013 8317 4010 8276

$$

1 follow-up statement

023 
WGUS71 KILN 190221
FFSILN

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE WILMINGTON OH
1021 PM EDT SUN MAR 18 2012

OHC049-097-190232-
/O.EXP.KILN.FF.W.0004.000000T0000Z-120319T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
FRANKLIN OH-MADISON OH-
1021 PM EDT SUN MAR 18 2012

...THE FLASH FLOOD WARNING FOR NORTHEASTERN MADISON AND FRANKLIN
COUNTIES IN CENTRAL OHIO WILL EXPIRE AT 1030 PM EDT...

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 3994 8280 3994 8281 3991 8280 3986 8281
      3997 8322 4011 8334 4010 8321 4011 8320
      4011 8317 4013 8317 4010 8276

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 18, 3:50 PM EDT	Special Weather Statement	ILN	Logan, Union	40 min
Mar 18, 4:10 PM EDT	Severe Thunderstorm Warning	ILN	Champaign, Logan, Union	35 min
Mar 18, 4:14 PM EDT	Areal Flood Advisory	ILN	Logan	3 hr
Mar 18, 4:21 PM EDT	Special Weather Statement	ILN	Logan	24 min
Mar 18, 4:44 PM EDT	Severe Thunderstorm Warning	ILN	Champaign, Logan, Union	31 min
Mar 18, 4:46 PM EDT	Special Weather Statement	ILN	Union	29 min
Mar 18, 4:53 PM EDT	Areal Flood Advisory	ILN	Champaign	112 min
Mar 18, 5:10 PM EDT	Special Weather Statement	ILN	Pike	20 min
Mar 18, 5:12 PM EDT	Areal Flood Advisory	ILN	Union	2 hr
Mar 18, 5:14 PM EDT	Special Weather Statement	ILN	Union	31 min
Mar 18, 5:17 PM EDT	Special Weather Statement	ILN	Greene	28 min
Mar 18, 5:18 PM EDT	Special Weather Statement	ILN	Delaware, Union	57 min
Mar 18, 5:25 PM EDT	Severe Thunderstorm Warning	ILN	Clark, Fayette, Greene, Madison	35 min
Mar 18, 5:26 PM EDT	Severe Thunderstorm Warning	ILN	Champaign, Delaware, Franklin, Union	49 min
Mar 18, 5:49 PM EDT	Flash Flood Warning	ILN	Champaign, Union	116 min
Mar 18, 5:57 PM EDT	Tornado Warning	ILN	Delaware, Franklin	33 min
Mar 18, 6:02 PM EDT	Severe Thunderstorm Warning	ILN	Fayette, Madison, Pickaway, Ross	43 min
Mar 18, 6:05 PM EDT	Severe Thunderstorm Warning	ILN	Franklin, Madison	40 min
Mar 18, 6:15 PM EDT	Areal Flood Advisory	ILN	Delaware, Franklin	3 hr
Mar 18, 6:25 PM EDT	Tornado Warning	ILN	Delaware, Franklin, Licking	35 min
Mar 18, 6:41 PM EDT	Severe Thunderstorm Warning	ILN	Fairfield, Franklin, Licking	49 min
Mar 18, 6:42 PM EDT	Severe Thunderstorm Warning	ILN	Fairfield, Pickaway	33 min
Mar 18, 6:45 PM EDT	Areal Flood Advisory	ILN	Fairfield, Franklin, Licking	3 hr
Mar 18, 6:57 PM EDT	Special Weather Statement	ILN	Licking	33 min
Mar 18, 7:15 PM EDT	Severe Thunderstorm Warning	ILN	Fairfield, Hocking, Pickaway	45 min
Mar 18, 7:22 PM EDT	Severe Thunderstorm Warning	ILN	Fairfield, Franklin, Licking	53 min
Mar 18, 7:33 PM EDT	Areal Flood Advisory	ILN	Licking	117 min
Mar 18, 7:52 PM EDT	Severe Thunderstorm Warning	ILN	Fairfield, Hocking	53 min

Nearby

Flash Flood Warnings in Ohio, 2012 Every flash flood warning in 2012

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.