Alert archive / Ohio / Flash Flood Watches in 2014

Flash Flood Watch 12, NWS Wilmington, OH

September 2, 201412 counties in Ohio; 6 counties in Indiana

NWS Wilmington, OH issued this flash flood watch at Sep 2, 2014, 2:42 AM EDT for 12 counties in Ohio; 6 counties in Indiana. It took effect at Sep 2, 2014, 3:00 AM EDT. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued
Sep 2, 2014, 2:42 AM EDT (06:42 UTC)
In effect from
Sep 2, 2014, 3:00 AM EDT
Expired
Sep 2, 2014, 10:54 AM EDT
In force
8 hr
Issued by
NWS Wilmington, OH
Flood severity
None

Counties Dearborn County, IN, Fayette County, IN, Franklin County, IN, Ripley County, IN, Union County, IN, Wayne County, IN, Butler County, OH, Clark County, OH, Clinton County, OH, Fayette County, OH, Franklin County, OH, Greene County, OH, Hamilton County, OH, Madison County, OH, Montgomery County, OH, Pickaway County, OH, Preble County, OH, Warren County, OH

The radar

The Cincinnati radar (KILN), 43 km from the middle of the area, began a volume at 06:42 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, 6.7 hours before the alert went out and 44 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-pSkew-T log-p diagram, Cncnati-Daytn, OH at 00:00Z on 2014-09-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1584 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Cncnati-Daytn, OH at 00:00Z on 2014-09-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 135 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1584 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
949 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
135 m²/s²
0-3 km storm-relative helicity
185 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 2, 5:17 AM EDTAreal Flood AdvisoryILNButler, Montgomery, Preble, Warren3 hr
Sep 2, 5:51 AM EDTAreal Flood AdvisoryILNClinton, Greene3 hr
Sep 2, 6:16 AM EDTAreal Flood AdvisoryILNHamilton3 hr
Sep 2, 6:47 AM EDTAreal Flood AdvisoryILNClark, Fayette, Franklin, Madison, Pickaway3 hr
Sep 2, 4:46 AM EDTAreal Flood AdvisoryILNFayette, Franklin, Union, Wayne3 hr
Sep 2, 5:40 AM EDTAreal Flood AdvisoryILNDearborn, Ripley3 hr

Nearby

Flash Flood Watches in Ohio, 2014Flash Flood Watches in Indiana, 2014Every flash flood watch in 2014

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.