Alert archive / Ohio / Flash Flood Watches in 2016

Flash Flood Watch 7, NWS Wilmington, OH

September 9, 201615 counties in Ohio; 6 counties in Indiana

NWS Wilmington, OH issued this flash flood watch at Sep 9, 2016, 3:46 PM EDT for 15 counties in Ohio; 6 counties in Indiana. It took effect at Sep 9, 2016, 8:00 PM EDT. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued: Sep 9, 2016, 3:46 PM EDT (19:46 UTC)
In effect from: Sep 9, 2016, 8:00 PM EDT
Expired: Sep 10, 2016, 3:57 AM EDT
In force: 8 hr
Issued by: NWS Wilmington, OH
Flood severity: None

All 21 counties

Dearborn County, IN, Fayette County, IN, Franklin County, IN, Ripley County, IN, Union County, IN, Wayne County, IN, Auglaize County, OH, Butler County, OH, Champaign County, OH, Clark County, OH, Darke County, OH, Greene County, OH, Hamilton County, OH, Hardin County, OH, Logan County, OH, Mercer County, OH, Miami County, OH, Montgomery County, OH, Preble County, OH, Shelby County, OH, Warren County, OH

The radar

The Cincinnati radar (KILN), 72 km from the middle of the area, began a volume at 19:47 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

Lincoln, IL (KILX), launched 12:00Z, 7.8 hours before the alert went out and 355 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: 61 J/kg
Mixed-layer CIN: -145 J/kg
Mixed-layer LCL: 781 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 24 m²/s²
0-3 km storm-relative helicity: -115 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Wilmington, OH wrote its last area forecast discussion before this flash flood watch went out at Sep 9, 2:15 PM EDT, 1 hour 31 minutes earlier.

Area forecast discussion, Sep 9, 2:15 PM EDT, 1 hour 31 minutes before

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Hazardous weather outlook, Sep 9, 5:07 AM EDT, 10 hours 39 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE WILMINGTON OH
507 AM EDT FRI SEP 9 2016

INZ050-058-059-066-073>075-080-KYZ089>100-OHZ026-034-035-042>046-
051>056-060>065-070>074-077>082-088-100915-
WAYNE-FAYETTE IN-UNION IN-FRANKLIN IN-RIPLEY-DEARBORN-OHIO-
SWITZERLAND-CARROLL-GALLATIN-BOONE-KENTON-CAMPBELL-OWEN-GRANT-
PENDLETON-BRACKEN-ROBERTSON-MASON-LEWIS-HARDIN-MERCER-AUGLAIZE-DARKE-
SHELBY-LOGAN-UNION OH-DELAWARE-MIAMI-CHAMPAIGN-CLARK-MADISON-
FRANKLIN OH-LICKING-PREBLE-MONTGOMERY-GREENE-FAYETTE OH-PICKAWAY-
FAIRFIELD-BUTLER-WARREN-CLINTON-ROSS-HOCKING-HAMILTON-CLERMONT-BROWN-
HIGHLAND-ADAMS-PIKE-SCIOTO-
507 AM EDT FRI SEP 9 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL
INDIANA...SOUTHEAST INDIANA...NORTHEAST KENTUCKY...NORTHERN
KENTUCKY...CENTRAL OHIO...SOUTHWEST OHIO AND WEST CENTRAL OHIO.

.DAY ONE...TODAY AND TONIGHT.

SCATTERED SHOWERS AND THUNDERSTORMS TODAY AND TONIGHT COULD
PRODUCE HEAVY RAINFALL AND LOCALIZED FLOODING.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

THUNDERSTORMS WILL DEVELOP AHEAD OF A COLD FRONT ON SATURDAY
AFTERNOON AND EVENING. CONDITIONS WILL BE FAVORABLE FOR SOME OF
THESE STORMS TO BECOME STRONG TO SEVERE WITH DAMAGING STRAIGHT
LINE WINDS THE PRIMARY THREAT. IN ADDITION...LOCALLY HEAVY
RAINFALL WILL BE POSSIBLE WHICH COULD LEAD TO FLASH FLOODING.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED SATURDAY AFTERNOON AND EVENING.

In the hours before

Local storm report, Sep 9, 10:02 AM EDT, 5 hours 44 minutes before

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Local storm report, Sep 9, 10:08 AM EDT, 5 hours 38 minutes before

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Local storm report, Sep 9, 10:45 AM EDT, 5 hours 1 minute before

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Local storm report, Sep 9, 11:10 AM EDT, 4 hours 36 minutes before

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Local storm report, Sep 9, 11:16 AM EDT, 4 hours 30 minutes before

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Local storm report, Sep 9, 11:33 AM EDT, 4 hours 13 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 8, 9:39 PM EDT	Areal Flood Advisory	ILN	Butler, Preble	111 min
Sep 8, 10:12 PM EDT	Flash Flood Warning	ILN	Butler, Hamilton	4 hr
Sep 8, 10:54 PM EDT	Areal Flood Advisory	ILN	Clermont, Clinton, Hamilton, Warren	3 hr
Sep 8, 11:05 PM EDT	Flash Flood Warning	ILN	Clinton, Hamilton, Warren	115 min
Sep 9, 12:51 AM EDT	Areal Flood Advisory	ILN	Clark, Clinton, Fayette, Greene, Madison, Warren	114 min
Sep 9, 12:58 AM EDT	Areal Flood Warning	ILN	Butler, Hamilton	12 hr
Sep 9, 12:58 AM EDT	River Flood Advisory	ILN	Hamilton	16 hr
Sep 9, 1:28 AM EDT	Areal Flood Advisory	ILN	Delaware, Franklin, Licking	2 hr
Sep 8, 8:23 PM EDT	Areal Flood Advisory	ILN	Fayette, Franklin, Union, Wayne	112 min
Sep 8, 9:13 PM EDT	Flash Flood Warning	ILN	Dearborn, Fayette, Franklin, Ripley, Union	5 hr
Sep 8, 11:22 PM EDT	Flash Flood Warning	ILN	Dearborn, Ohio, Ripley	9 hr
Sep 9, 1:39 AM EDT	Areal Flood Warning	ILN	Dearborn, Franklin, Ripley	10 hr

Nearby

Flash Flood Watches in Ohio, 2016 Flash Flood Watches in Indiana, 2016 Every flash flood watch in 2016

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.