Alert archive / Ohio / Flash Flood Warnings in 2012

Flash Flood Warning 1, NWS Wilmington, OH

March 15, 2012Clermont County, Hamilton County, Warren County, Ohio

NWS Wilmington, OH issued this flash flood warning at Mar 15, 2012, 11:03 AM EDT for Clermont County, Hamilton County, Warren 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: Mar 15, 2012, 11:03 AM EDT (15:03 UTC)
Expired: Mar 15, 2012, 1:26 PM EDT
In force: 2 hr
Issued by: NWS Wilmington, OH
Area: Storm-based polygon
Flood severity: None

Counties Clermont County, OH, Hamilton County, OH, Warren County, OH

The radar

The Cincinnati radar (KILN), 52 km from the middle of the area, began a volume at 15:03 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 12:00Z, 3.1 hours before the alert went out and 55 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: 1236 J/kg
Mixed-layer CIN: -110 J/kg
Mixed-layer LCL: 1005 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 133 m²/s²
0-3 km storm-relative helicity: 137 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.2

Open this sounding in Storm Lab

The text

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

982 
WGUS51 KILN 151503
FFWILN
OHC025-061-165-151800-
/O.NEW.KILN.FF.W.0001.120315T1503Z-120315T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE WILMINGTON OH
1103 AM EDT THU MAR 15 2012

THE NATIONAL WEATHER SERVICE IN WILMINGTON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN CLERMONT COUNTY IN SOUTHWEST OHIO...
  HAMILTON COUNTY IN SOUTHWEST OHIO...
  SOUTHERN WARREN COUNTY IN SOUTHWEST OHIO...

* UNTIL 200 PM EDT.

* AT 1059 AM EDT...RADAR INDICATED THAT THUNDERSTORMS HAD 
  PRODUCED HEAVY RAINFALL ACROSS THE WARNED AREA. RADAR
  ESTIMATED AS MUCH AS 1.5 INCHES OF RAIN HAS FALLEN SINCE
  10 AM.

* HEAVY RAIN CONTINUES TO FALL ACROSS THE WARNED AREA WITH ANOTHER   
  1 TO 2 INCHES POSSIBLE THROUGH 200 PM EDT. RUNOFF FROM THIS   
  EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO OCCUR.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...BLUE ASH...
CHEVIOT...CINCINNATI...DEER PARK...FINNEYTOWN...FOREST PARK...
LOVELAND...MADEIRA...MASON...MILFORD...MONTGOMERY AND MOUNT HEALTHY.

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.

&&

LAT...LON 3930 8469 3930 8439 3929 8436 3941 8434
      3937 8400 3900 8404 3910 8432 3914 8466

$$

1 follow-up statement

137 
WGUS71 KILN 151726
FFSILN

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE WILMINGTON OH
126 PM EDT THU MAR 15 2012

OHC025-061-165-151736-
/O.CAN.KILN.FF.W.0001.000000T0000Z-120315T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
HAMILTON OH-WARREN OH-CLERMONT OH-
126 PM EDT THU MAR 15 2012

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR NORTHERN
CLERMONT...SOUTHERN WARREN AND HAMILTON 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 3930 8469 3930 8439 3929 8436 3941 8434
      3937 8400 3900 8404 3910 8432 3914 8466

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 15, 3:29 AM EDT	Special Weather Statement	ILN	Ross	31 min
Mar 15, 3:45 AM EDT	Special Weather Statement	ILN	Scioto	30 min
Mar 15, 4:10 AM EDT	Special Weather Statement	ILN	Ross	35 min
Mar 15, 4:49 AM EDT	Special Weather Statement	ILN	Licking	26 min
Mar 15, 4:55 AM EDT	Special Weather Statement	ILN	Licking	35 min
Mar 15, 5:56 AM EDT	Areal Flood Advisory	ILN	Fairfield, Licking	3 hr
Mar 15, 7:16 AM EDT	Special Weather Statement	ILN	Fairfield, Hocking, Licking	59 min
Mar 15, 7:30 AM EDT	River Flood Advisory	ILN	Licking	6 hr
Mar 15, 7:34 AM EDT	Areal Flood Advisory	ILN	Fairfield, Hocking	3 hr
Mar 15, 8:07 AM EDT	Areal Flood Warning	ILN	Fairfield, Licking	6 hr
Mar 15, 8:49 AM EDT	Special Weather Statement	ILN	Fairfield, Hocking, Pickaway, Ross	56 min
Mar 15, 9:11 AM EDT	Special Weather Statement	ILN	Butler, Warren	64 min
Mar 15, 9:23 AM EDT	Special Weather Statement	ILN	Auglaize	37 min
Mar 15, 10:11 AM EDT	Special Weather Statement	ILN	Hamilton	49 min
Mar 15, 10:17 AM EDT	Special Weather Statement	ILN	Butler	28 min
Mar 15, 10:18 AM EDT	Severe Thunderstorm Warning	ILN	Warren	27 min
Mar 15, 10:27 AM EDT	Areal Flood Advisory	ILN	Clermont, Hamilton, Warren	3 hr
Mar 15, 10:51 AM EDT	Special Weather Statement	ILN	Adams, Brown, Butler, Clermont, Hamilton, Highland and 3 more	54 min
Mar 15, 11:18 AM EDT	Severe Thunderstorm Warning	ILN	Clinton, Warren	30 min
Mar 15, 11:30 AM EDT	Areal Flood Advisory	ILN	Adams, Brown, Clinton, Highland, Pike, Ross and 1 more	3 hr
Mar 15, 11:45 AM EDT	Special Weather Statement	ILN	Adams, Brown, Clermont, Clinton, Hamilton, Highland and 4 more	60 min
Mar 15, 11:55 AM EDT	Special Weather Statement	ILN	Fayette, Greene, Pickaway	65 min
Mar 15, 11:59 AM EDT	Areal Flood Advisory	ILN	Clinton, Fayette, Greene, Highland, Ross	3 hr
Mar 15, 12:17 PM EDT	River Flood Advisory	ILN	Licking	5 hr
Mar 15, 1:59 PM EDT	Areal Flood Advisory	ILN	Licking	2 hr
Mar 15, 2:32 PM EDT	Special Weather Statement	ILN	Fairfield, Pickaway	58 min
Mar 15, 3:29 PM EDT	Special Weather Statement	ILN	Miami	46 min
Mar 15, 3:49 PM EDT	Special Weather Statement	ILN	Fayette	41 min
Mar 15, 3:51 PM EDT	Flash Flood Watch	ILN	Adams, Brown, Clermont, Hamilton, Highland, Hocking and 3 more	14 hr
Mar 15, 4:18 PM EDT	Special Weather Statement	ILN	Auglaize	42 min
Mar 15, 4:26 PM EDT	Severe Thunderstorm Warning	ILN	Auglaize, Hardin	34 min
Mar 15, 4:48 PM EDT	Special Weather Statement	ILN	Shelby	42 min
Mar 15, 4:51 PM EDT	Special Weather Statement	ILN	Hamilton	69 min
Mar 15, 4:57 PM EDT	Severe Thunderstorm Warning	ILN	Auglaize, Hardin, Logan	33 min
Mar 15, 5:07 PM EDT	Severe Thunderstorm Warning	ILN	Auglaize, Logan, Shelby	38 min
Mar 15, 5:24 PM EDT	Severe Thunderstorm Warning	ILN	Auglaize, Hardin, Logan, Shelby	36 min
Mar 15, 5:39 PM EDT	Areal Flood Advisory	ILN	Hamilton	3 hr
Mar 15, 5:42 PM EDT	Severe Thunderstorm Warning	ILN	Logan, Shelby	48 min
Mar 15, 5:45 PM EDT	Severe Thunderstorm Warning	ILN	Clermont	45 min
Mar 15, 5:59 PM EDT	Severe Thunderstorm Warning	ILN	Hamilton	46 min
Mar 15, 6:09 PM EDT	Severe Thunderstorm Warning	ILN	Brown	36 min
Mar 15, 6:20 PM EDT	Areal Flood Advisory	ILN	Shelby	115 min
Mar 15, 6:22 PM EDT	Areal Flood Advisory	ILN	Brown, Butler, Clermont, Hamilton, Warren	3 hr
Mar 15, 6:24 PM EDT	Special Weather Statement	ILN	Butler, Hamilton, Preble	51 min
Mar 15, 6:25 PM EDT	Severe Thunderstorm Warning	ILN	Logan, Shelby	33 min
Mar 15, 6:29 PM EDT	Severe Thunderstorm Warning	ILN	Clermont	46 min
Mar 15, 6:42 PM EDT	Severe Thunderstorm Warning	ILN	Butler, Montgomery, Preble, Warren	32 min
Mar 15, 6:53 PM EDT	Special Weather Statement	ILN	Brown	52 min
Mar 15, 7:15 PM EDT	Special Weather Statement	ILN	Adams, Brown, Clermont, Darke, Miami, Montgomery and 1 more	60 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.