Alert archive / Ohio / Flash Flood Watches in 2017

Flash Flood Watch 6, NWS Wilmington, OH

July 11, 201725 counties in Ohio; 4 counties in Indiana

NWS Wilmington, OH issued this flash flood watch at Jul 11, 2017, 3:30 AM EDT for 25 counties in Ohio; 4 counties in Indiana. It was in force for 15 hr.

The area

The counties it named.

The facts

Issued
Jul 11, 2017, 3:30 AM EDT (07:30 UTC)
Expired
Jul 11, 2017, 6:23 PM EDT
In force
15 hr
Issued by
NWS Wilmington, OH
Flood severity
None
All 29 counties

Fayette County, IN, Franklin County, IN, Union County, IN, Wayne County, IN, Auglaize County, OH, Butler County, OH, Champaign County, OH, Clark County, OH, Clinton County, OH, Darke County, OH, Delaware County, OH, Fairfield County, OH, Fayette County, OH, Franklin County, OH, Greene County, OH, Hardin County, OH, Hocking County, OH, Licking County, OH, Logan County, OH, Madison County, OH, Mercer County, OH, Miami County, OH, Montgomery County, OH, Pickaway County, OH, Preble County, OH, Ross County, OH, Shelby County, OH, Union County, OH, Warren County, OH

The radar

The Cincinnati radar (KILN), 53 km from the middle of the area, began a volume at 07:33 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, 7.5 hours before the alert went out and 53 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 2017-07-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 299 joules per kilogram.LCLLFCEL10008507005003002001001 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 2017-07-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 73 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
299 J/kg
Mixed-layer CIN
-35 J/kg
Mixed-layer LCL
1494 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
73 m²/s²
0-3 km storm-relative helicity
192 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.6

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 Jul 11, 2:03 AM EDT, 1 hour 27 minutes earlier.

Area forecast discussion, Jul 11, 2:03 AM EDT, 1 hour 27 minutes before
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Hazardous weather outlook, Jul 10, 5:28 AM EDT, 22 hours 2 minutes before
Hazardous Weather Outlook
National Weather Service Wilmington OH
528 AM EDT Mon Jul 10 2017

INZ050-058-059-OHZ026-034-035-042>046-051>056-060>065-073-074-110930-
Wayne-Fayette IN-Union IN-Hardin-Mercer-Auglaize-Darke-Shelby-Logan-
Union OH-Delaware-Miami-Champaign-Clark-Madison-Franklin OH-Licking-
Preble-Montgomery-Greene-Fayette OH-Pickaway-Fairfield-Ross-Hocking-
528 AM EDT Mon Jul 10 2017

This Hazardous Weather Outlook is for East Central Indiana, Central
Ohio, Southwest Ohio and West Central Ohio.

.DAY ONE...Today and Tonight.

Several rounds of thunderstorms are expected to move across the
region today. Some of these storms could produce damaging straight
line winds and large hail. Heavy rainfall may also occur which could
lead to localized flooding.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Hot and humid conditions are expected Wednesday and Thursday which
may result in heat indices rising into the mid to upper 90s both
days.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

INZ066-073>075-080-KYZ089>100-OHZ070>072-077>082-088-110930-
Franklin IN-Ripley-Dearborn-Ohio-Switzerland-Carroll-Gallatin-Boone-
Kenton-Campbell-Owen-Grant-Pendleton-Bracken-Robertson-Mason-Lewis-
Butler-Warren-Clinton-Hamilton-Clermont-Brown-Highland-Adams-Pike-
Scioto-
528 AM EDT Mon Jul 10 2017

This Hazardous Weather Outlook is for Southeast Indiana, Northeast
Kentucky, Northern Kentucky and Southwest Ohio.

.DAY ONE...Today and Tonight.

Thunderstorms developing today will result in heavy downpours that
may cause localized flooding. In addition, some thunderstorms may
produce isolated damaging wind gusts and large hail.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Hot and humid conditions are expected Wednesday and Thursday which
may result in heat indices rising into the mid to upper 90s both
days.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

In the hours before

Local storm report, Jul 10, 10:32 PM EDT, 4 hours 58 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OH
1032 PM EDT MON JUL 10 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1031 PM     HAIL             MENDON                  40.67N 84.52W
07/10/2017  M2.50 INCH       MERCER             OH   TRAINED SPOTTER

&&

JGIBSON
Special weather statement, Jul 10, 11:00 PM EDT, 4 hours 30 minutes before
Special Weather Statement
National Weather Service Wilmington OH
1100 PM EDT MON JUL 10 2017

OHZ035-043-110330-
Auglaize OH-Shelby OH-
1100 PM EDT MON JUL 10 2017

...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN SHELBY AND NORTHERN
AUGLAIZE COUNTIES UNTIL 1130 PM EDT...

At 1100 PM EDT, radar indicated a strong thunderstorm near
Wapakoneta, moving southeast at 20 mph.

STORM HAZARDS INCLUDE...
Winds to 50 mph...
Nickel size hail...
Very heavy rain...

Locations impacted include...
Wapakoneta, St. Marys, Anna, Jackson Center, Botkins, New Knoxville,
Moulton, Buckland, Kettlersville, Fryburg, Montra, Kossuth, St.
Johns, Bulkhead, Mccartyville and Swanders.

This includes I-75 in Ohio between mile markers 97 and 114.

Water will pond on roads and may quickly fill roadside ditches and
small streams.

Residents in these areas should remain alert. If this storm becomes
stronger, then a warning may be needed.

To report hazardous weather conditions, go to our website at
weather.gov/iln and submit your report via social media, when you can
do so safely.

LAT...LON 4050 8399 4049 8399 4048 8400 4045 8400
      4030 8422 4056 8446 4058 8446 4069 8431
      4069 8429
TIME...MOT...LOC 0300Z 303DEG 16KT 4057 8428

JDR
Local storm report, Jul 10, 11:57 PM EDT, 3 hours 33 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OH
1157 PM EDT MON JUL 10 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1156 PM     FLASH FLOOD      WAPAKONETA              40.57N 84.19W
07/10/2017                   AUGLAIZE           OH   LAW ENFORCEMENT

            REPORTS OF WATER RESCUES OCCURING IN WAPAKONETA. NO
            FURTHER INFORMATION AT THIS TIME.

&&

JGIBSON
Special weather statement, Jul 11, 1:07 AM EDT, 2 hours 23 minutes before
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Local storm report, Jul 11, 1:14 AM EDT, 2 hours 16 minutes before
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Local storm report, Jul 11, 1:20 AM EDT, 2 hours 10 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 10, 8:12 PM EDTSevere Thunderstorm WarningILNMercer48 min
Jul 10, 8:26 PM EDTTornado WarningILNMercer34 min
Jul 10, 8:58 PM EDTSevere Thunderstorm WarningILNAuglaize, Mercer, Shelby25 min
Jul 10, 9:22 PM EDTSpecial Weather StatementILNAuglaize38 min
Jul 10, 9:43 PM EDTSpecial Weather StatementILNAuglaize32 min
Jul 10, 9:56 PM EDTSpecial Weather StatementILNAuglaize34 min
Jul 10, 10:19 PM EDTSevere Thunderstorm WarningILNAuglaize, Mercer41 min
Jul 10, 11:00 PM EDTSpecial Weather StatementILNAuglaize, Shelby30 min
Jul 10, 11:13 PM EDTAreal Flood AdvisoryILNAuglaize, Mercer2 hr
Jul 10, 11:54 PM EDTFlash Flood WarningILNAuglaize3 hr
Jul 11, 1:07 AM EDTSpecial Weather StatementILNFranklin23 min
Jul 11, 1:17 AM EDTAreal Flood AdvisoryILNChampaign, Miami3 hr
Jul 11, 1:49 AM EDTAreal Flood AdvisoryILNChampaign, Clark3 hr
Jul 11, 2:10 AM EDTAreal Flood AdvisoryILNMadison, Pickaway3 hr
Jul 11, 2:25 AM EDTAreal Flood AdvisoryILNClark, Madison3 hr
Jul 11, 2:41 AM EDTAreal Flood AdvisoryILNClark, Fayette, Greene, Madison3 hr
Jul 11, 3:29 AM EDTAreal Flood AdvisoryILNFairfield, Pickaway3 hr
Jul 11, 3:40 AM EDTFlash Flood WarningILNFayette, Madison, Pickaway3 hr
Jul 11, 6:39 AM EDTAreal Flood WarningILNFayette, Madison, Pickaway12 hr
Jul 11, 9:53 AM EDTSpecial Weather StatementILNGreene37 min
Jul 11, 10:31 AM EDTSpecial Weather StatementILNGreene29 min
Jul 11, 2:17 PM EDTSevere Thunderstorm WarningILNHamilton28 min
Jul 11, 2:25 PM EDTSpecial Weather StatementILNButler, Miami, Montgomery, Preble35 min
Jul 11, 2:28 PM EDTSevere Thunderstorm WarningILNButler, Darke, Miami, Montgomery, Preble, Warren32 min
Jul 11, 2:41 PM EDTSevere Thunderstorm WarningILNButler, Clark, Clinton, Greene, Miami, Montgomery and 1 more49 min
Jul 11, 3:30 PM EDTSevere Thunderstorm WarningILNClinton, Greene, Montgomery, Warren34 min
Jul 11, 2:37 PM EDTAreal Flood AdvisoryILNBoone3 hr
Jul 11, 2:45 PM EDTSevere Thunderstorm WarningILNBoone, Campbell, Grant, Kenton, Pendleton30 min
Jul 11, 9:05 AM EDTSpecial Weather StatementILNFranklin25 min
Jul 11, 9:36 AM EDTSpecial Weather StatementILNFranklin24 min
Jul 11, 1:20 PM EDTSpecial Weather StatementILNFayette, Union, Wayne25 min
Jul 11, 1:43 PM EDTSpecial Weather StatementILNFayette, Franklin, Union32 min
Jul 11, 1:55 PM EDTSevere Thunderstorm WarningILNDearborn, Franklin, Ripley35 min

Nearby

Flash Flood Watches in Ohio, 2017Flash Flood Watches in Indiana, 2017Every flash flood watch in 2017

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.