Alert archive / Ohio / Flash Flood Warnings in 2017

Flash Flood Warning 28, NWS Wilmington, OH

May 24, 2017Butler County, Hamilton County, Ohio

NWS Wilmington, OH issued this flash flood warning at May 24, 2017, 5:54 PM EDT for Butler County, Hamilton County, Ohio. It was in force for 6 hr. 6 reports 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: May 24, 2017, 5:54 PM EDT (21:54 UTC)
Expired: May 24, 2017, 11:30 PM EDT
In force: 6 hr
Issued by: NWS Wilmington, OH
Area: Storm-based polygon
Flood severity: None

Counties Butler County, OH, Hamilton County, OH

The radar

The Cincinnati radar (KILN), 71 km from the middle of the area, began a volume at 21:58 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
May 24, 6:18 PM EDT	HEAVY RAIN 1.81	Fairfield, OH	RAINFALL IN 45-MINUTE SPAN.
May 24, 6:34 PM EDT	FLASH FLOOD	5 Wsw Mount Healthy, OH	WATER REPORTED RUSHING OVER RACE RD. NEAR WEST FORK RD.
May 24, 6:57 PM EDT	FLASH FLOOD	5 Wsw Mount Healthy, OH	RAPIDLY MOVING WATER OBSERVED OVER A PORTION OF SHEED RD.
May 24, 7:40 PM EDT	FLASH FLOOD	5 Nnw Bridgetown, OH	TAYLOR CREEK OVERFLOWED BANKS NEAR HARRISON AT SPRINGDALE AVE. RUSHING WATER OVER ROAD.
May 24, 7:45 PM EDT	FLASH FLOOD	4 Nne Hamilton, OH	RAILROAD WAS WASHED OUT BY FLOODING ON SEVENMILE CREEK.
May 24, 8:25 PM EDT	FLASH FLOOD	Fairfield, OH	2.62 INCHES OF RAINFALL IN THE LAST HOUR AND A HALF.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 5 storm reports to this flash flood warning; the first came 40 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 9.9 hours before the alert went out and 73 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: 10 J/kg
Mixed-layer CIN: -89 J/kg
Mixed-layer LCL: 828 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: 80 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

608 
WGUS51 KILN 242154
FFWILN
OHC017-061-250030-
/O.NEW.KILN.FF.W.0028.170524T2154Z-170525T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Wilmington OH
554 PM EDT WED MAY 24 2017

The National Weather Service in Wilmington has issued a

* Flash Flood Warning for...
  Northwestern Hamilton County in southwestern Ohio...
  Central Butler County in southwestern Ohio...

* Until 830 PM EDT.

* At 552 PM EDT, radar indicated that thunderstorms had produced
  heavy rain across the warned area. Up to two inches of rain have 
  already fallen. Heavy rain continues to fall with another 1 to 2 
  inches possible. Runoff from this excessive rainfall will cause 
  flash flooding to occur.

* Some locations that will experience flooding include...
  Cincinnati, Hamilton, Fairfield, Oxford, Forest Park, Trenton,
  Springdale, North College Hill, Wyoming, Cheviot, Mount Healthy,
  Finneytown, Cleves, Seven Mile, Taylor Creek, Bridgetown,
  Williamsdale, Pleasant Hills, Miami Heights and Skyline Acres.

In addition, places along the following streams may be affected...
Sevenmile Creek, Taylor Creek, Briarly Creek, and Jordan Creek. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Move to higher ground now. Act quickly to protect your life.

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

&&

LAT...LON 3957 8445 3917 8448 3914 8473 3915 8474
      3920 8475 3924 8460 3944 8461 3945 8477
      3957 8480

$$

3 follow-up statements

235 
WGUS71 KILN 242326
FFSILN

Flash Flood Statement
National Weather Service Wilmington OH
726 PM EDT WED MAY 24 2017

OHC017-061-250030-
/O.CON.KILN.FF.W.0028.000000T0000Z-170525T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Hamilton OH-Butler OH-
726 PM EDT WED MAY 24 2017

...THE FLASH FLOOD WARNING FOR NORTHWESTERN HAMILTON AND CENTRAL
BUTLER COUNTIES REMAINS IN EFFECT Until 830 PM EDT...

At 719 PM EDT, emergency management officials reported water rescues 
ongoing in the city of Hamilton and in Wayne Township due to flash 
flooding. Radar estimates that up to 4 inches of rain have fallen. 
Radar indicated that showers and thunderstorms continue to fall with 
another 1 to 2 inches possible. Runoff from this excessive rainfall 
will cause flash flooding to continue to occur.

Some locations that will experience flooding include...
Cincinnati, Hamilton, Fairfield, Oxford, Forest Park, Trenton,
Springdale, North College Hill, Wyoming, Cheviot, Mount Healthy,
Finneytown, Cleves, Seven Mile, Taylor Creek, Bridgetown,
Williamsdale, Pleasant Hills, Miami Heights and Skyline Acres.

In addition, places along the following streams may be affected...
Sevenmile Creek, Taylor Creek, Briarly Creek, and Jordan Creek.  

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Move to higher ground now. Act quickly to protect your life. 

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

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

&&

LAT...LON 3957 8445 3917 8448 3914 8473 3915 8474
      3920 8475 3924 8460 3944 8461 3945 8477
      3957 8480

$$

711 
WGUS51 KILN 250023
FFWILN
OHC017-061-250330-
/O.EXT.KILN.FF.W.0028.000000T0000Z-170525T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Wilmington OH
823 PM EDT WED MAY 24 2017

The National Weather Service in Wilmington has extended the

* Flash Flood Warning for...
  Northwestern Hamilton County in southwestern Ohio...
  Central Butler County in southwestern Ohio...

* Until 1130 PM EDT.

* At 822 PM EDT, local law enforcement reported flash flooding is 
  still ongoing across the warned area. Radar estimated that up to 
  4.5 inches of rain have fallen. Radar indicated that the heavy 
  rainfall has ended across the area, although some light to 
  moderate rain will continue through the evening. Runoff from the 
  earlier excessive rain will cause flash flooding to continue to 
  occur.

* Some locations that will experience flooding include...
  Cincinnati, Hamilton, Fairfield, Oxford, Forest Park, Trenton,
  Springdale, North College Hill, Wyoming, Cheviot, Mount Healthy,
  Finneytown, Cleves, Seven Mile, Taylor Creek, Bridgetown,
  Williamsdale, Pleasant Hills, Miami Heights and Skyline Acres.

In addition, places along the following streams may be affected...
Sevenmile Creek, Taylor Creek, Briarly Creek, and Jordan Creek. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

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

&&

LAT...LON 3957 8445 3917 8448 3914 8473 3915 8474
      3920 8475 3924 8460 3944 8461 3945 8477
      3957 8480

$$

433 
WGUS71 KILN 250323
FFSILN

Flash Flood Statement
National Weather Service Wilmington OH
1123 PM EDT WED MAY 24 2017

OHC017-061-250332-
/O.EXP.KILN.FF.W.0028.000000T0000Z-170525T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Hamilton OH-Butler OH-
1123 PM EDT WED MAY 24 2017

...THE FLASH FLOOD WARNING FOR NORTHWESTERN HAMILTON AND CENTRAL
BUTLER COUNTIES WILL EXPIRE AT 1130 PM EDT...

The heavy rain has ended and flash flooding is no longer expected to 
pose a threat. Please be aware of standing water on area roadways 
and swift-running area creeks and streams. 

Please report previous flash flooding to the National Weather Service
by going to our website at weather.gov/iln and submitting your report
via social media.

LAT...LON 3957 8445 3917 8448 3914 8473 3915 8474
      3920 8475 3924 8460 3944 8461 3945 8477
      3957 8480

$$

Franks

What forecasters said that day

The local office's own words before this flash flood warning 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 warning went out at May 24, 3:38 PM EDT, 2 hours 16 minutes earlier.

Area forecast discussion, May 24, 3:38 PM EDT, 2 hours 16 minutes before

Area Forecast Discussion
National Weather Service Wilmington OH
338 PM EDT Wed May 24 2017

.SYNOPSIS...
An unsettled pattern will be present across the region through
the week. An area of low pressure will meander across the region
through Thursday. Multiple systems will then work across the
area Friday through Tuesday.

&&

.NEAR TERM /UNTIL 6 AM THURSDAY MORNING/...
An area of low pressure will move into the region this
evening. Showers and some thunderstorms will rotate around this
feature. Precipitation may be heavy at times. With low LCLs
cannot rule out some tornado potential through the early evening
hours. Will continue to mention the severe threat in the HWO and
added additional flash flood risk wording across western
portions of the region.

&&

.SHORT TERM /6 AM THURSDAY MORNING THROUGH THURSDAY NIGHT/...
Showers and isolated thunderstorms will continue to be possible
on Thursday as an area of low pressure meanders across the
region. With the cloud cover associated with the low,
temperatures will struggle to rise and are only expected to make
it into the middle 60s.

As the low moves off out of the area precipitation chances will
taper off Thursday night.

&&

.LONG TERM /FRIDAY THROUGH WEDNESDAY/...
Mid level ridging will push east across the region through the day
on Friday leading to dry conditions and seasonable temperatures. As
the ridge pushes east, a developing southwesterly flow pattern will
allow for occasional mid level short waves to cross the area through
the weekend. This will result in a chance of showers an
thunderstorms Saturday and Sunday with highs both days in the upper
70s.

An upper level low will slowly drop down across the northern Great
Lakes through early next week. As it does, some weak energy will
rotate around it, bringing some lower chances of precipitation
through the rest of the long term period. Temperatures will also
cool off a bit with highs mainly in the low to mid 70s through
Wednesday.

&&

.AVIATION /19Z WEDNESDAY THROUGH MONDAY/...
An area of low pressure will meander across the area through the
TAF period. This will allow for reduced visibilities with
intermittent showers and thunderstorms. The most widespread
coverage of precipitation is expected to be across KCVG and
KLUK. In addition, cigs will be reduced as well especially later
during the overnight hours into the daytime hours on Thursday.

OUTLOOK...MVFR to IFR ceilings likely Thursday with MVFR
visibilities possible. MVFR ceilings, visibilities, along with a
chance of thunderstorms possible Friday night into Sunday.

&&

.ILN WATCHES/WARNINGS/ADVISORIES...
OH...None.
KY...None.
IN...None.

&&

SYNOPSIS...Novak
NEAR TERM...Novak
SHORT TERM...Novak
LONG TERM...JGL
AVIATION...Novak

Hazardous weather outlook, May 24, 5:49 PM EDT, 5 minutes before

Hazardous Weather Outlook
National Weather Service Wilmington OH
549 PM EDT Wed May 24 2017

KYZ099-100-OHZ026-044>046-052>056-062>065-072>074-079>082-088-252200-
Mason-Lewis-Hardin-Logan-Union OH-Delaware-Champaign-Clark-Madison-
Franklin OH-Licking-Greene-Fayette OH-Pickaway-Fairfield-Clinton-
Ross-Hocking-Brown-Highland-Adams-Pike-Scioto-
549 PM EDT Wed May 24 2017

This Hazardous Weather Outlook is for Northeast Kentucky, Northern
Kentucky, Central Ohio, Southwest Ohio and West Central Ohio.

.DAY ONE...Tonight.

A deep low pressure system will be present over the region.
Thunderstorms that develop may get some added energy if sunshine is
able to break through the cloud deck. These stronger isolated storms
have the potential to create damaging winds or possibly a weak
tornado through the early evening hours.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

KYZ097-098-OHZ034-035-043-051-061-071-078-252200-
Bracken-Robertson-Mercer-Auglaize-Shelby-Miami-Montgomery-Warren-
Clermont-
549 PM EDT Wed May 24 2017

This Hazardous Weather Outlook is for Northern Kentucky, Southwest
Ohio and West Central Ohio.

.DAY ONE...Tonight.

A deep low pressure system will be present over the region.
Thunderstorms that develop may get some added energy if sunshine is
able to break through the cloud deck. These stronger isolated storms
have the potential to create damaging winds or possibly a weak
tornado through the early evening hours.

Rain may be heavy at times through tonight leading to a flash flood
risk.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

INZ050-058-059-066-073>075-080-KYZ089>096-OHZ042-060-070-077-252200-
Wayne-Fayette IN-Union IN-Franklin IN-Ripley-Dearborn-Ohio-
Switzerland-Carroll-Gallatin-Boone-Kenton-Campbell-Owen-Grant-
Pendleton-Darke-Preble-Butler-Hamilton-
549 PM EDT Wed May 24 2017

...FLASH FLOOD WATCH IN EFFECT THROUGH THURSDAY MORNING...

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

.DAY ONE...Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flash Flood Watch.

A deep low pressure system will be present over the region.
Thunderstorms that develop may get some added energy if sunshine is
able to break through the cloud deck. These stronger isolated storms
have the potential to create damaging winds or possibly a weak
tornado through the early evening hours.

Rain may be heavy at times through tonight leading to a flash flood
risk.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flash Flood Watch.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

In the hours before

Special weather statement, May 24, 5:41 PM EDT, 13 minutes before

Special Weather Statement
National Weather Service Wilmington OH
541 PM EDT WED MAY 24 2017

INZ075-080-KYZ089>091-242215-
Switzerland IN-Ohio IN-Boone KY-Carroll KY-Gallatin KY-
541 PM EDT WED MAY 24 2017

...A STRONG THUNDERSTORM WILL AFFECT OHIO...CENTRAL SWITZERLAND...
EASTERN CARROLL...SOUTHERN BOONE AND GALLATIN COUNTIES UNTIL 615 PM
EDT...

At 541 PM EDT, radar indicated a strong thunderstorm over Florence,
moving north at 10 mph.

STORM HAZARDS INCLUDE...
Winds to 30 mph...
Pea size hail...
Very heavy rain...

Locations impacted include...
Rising Sun, Warsaw, Florence, Kentucky Speedway, Glencoe, Fairview,
Sparta, Patriot, Ethridge, Center Square, Aberdeen, Interstate 71 at
US Route 127, Steele Bottom, Markland, East Enterprise, Rabbit Hash,
Allensville, Quercus Grove, Mount Sterling and North Landing.

This includes I-71 in Kentucky between mile markers 55 and 64.

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

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 3895 8484 3872 8478 3872 8480 3871 8481
      3870 8483 3871 8483 3870 8484 3868 8502
      3889 8512
TIME...MOT...LOC 2141Z 164DEG 8KT 3878 8494

Haines

Local storm report, May 24, 5:49 PM EDT, 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OH
549 PM EDT WED MAY 24 2017

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

0546 PM     FLASH FLOOD      4 WNW ROSS              39.33N 84.72W
05/24/2017                   BUTLER             OH   TRAINED SPOTTER

            FLOWING WATER REPORTED OVER A PORTION OF CINCINNATI
            BROOKVILLE ROAD NEAR SHANDON.

&&

KC

The office that day

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

Issued	Product	Office	Counties	Lasted
May 24, 5:02 PM EDT	Areal Flood Advisory	ILN	Butler, Hamilton	3 hr
May 24, 5:07 PM EDT	Flash Flood Watch	ILN	Butler, Darke, Hamilton, Preble	18 hr
May 24, 5:25 PM EDT	Flash Flood Warning	ILN	Butler, Hamilton	6 hr
May 24, 6:04 PM EDT	Special Weather Statement	ILN	Butler, Hamilton	26 min
May 24, 6:20 PM EDT	Tornado Warning	ILN	Preble	12 min
May 24, 7:04 PM EDT	Areal Flood Advisory	ILN	Butler, Montgomery, Preble, Warren	5 hr
May 24, 7:09 PM EDT	Areal Flood Advisory	ILN	Darke, Mercer	6 hr
May 24, 7:42 PM EDT	Special Weather Statement	ILN	Madison	33 min
May 24, 7:55 PM EDT	Tornado Warning	ILN	Clinton, Greene, Warren	18 min

Nearby

Flash Flood Warnings in Ohio, 2017 Every flash flood warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.