Alert archive / Ohio / Flash Flood Warnings in 2017

Flash Flood Warning 36, NWS Charleston, WV

July 10, 2017Athens County, Morgan County, Perry County, Ohio

NWS Charleston, WV issued this flash flood warning at Jul 10, 2017, 5:50 PM EDT for Athens County, Morgan County, Perry County, Ohio. It was in force for 3 hr. 2 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: Jul 10, 2017, 5:50 PM EDT (21:50 UTC)
Expired: Jul 10, 2017, 8:45 PM EDT
In force: 3 hr
Issued by: NWS Charleston, WV
Area: Storm-based polygon
Flood severity: None

Counties Athens County, OH, Morgan County, OH, Perry County, OH

The radar

The Charleston,WV radar (KRLX), 141 km from the middle of the area, began a volume at 21:50 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
Jul 10, 6:30 PM EDT	FLASH FLOOD	5 Wnw Shawnee, OH	WATER OVER DUTCH RIDGE ROAD IN MONDAY CREEK TOWNSHIP MAKING IT IMPASSABLE
Jul 10, 6:35 PM EDT	FLASH FLOOD	6 Wnw New Straitsville, OH	WATER OVER RTE 312 IN MONDAY CREEK TOWNSHIP WITH ROAD CLOSED IN BOTH DIRECTIONS

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

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 9.8 hours before the alert went out and 140 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: 235 J/kg
Mixed-layer CIN: -85 J/kg
Mixed-layer LCL: 985 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 294 m²/s²
0-3 km storm-relative helicity: 291 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

As transmitted.

081 
WGUS51 KRLX 102150
FFWRLX
OHC009-115-127-110045-
/O.NEW.KRLX.FF.W.0036.170710T2150Z-170711T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Charleston WV
550 PM EDT MON JUL 10 2017

The National Weather Service in Charleston West Virginia has issued a

* Flash Flood Warning for...
  Southern Perry County in southeastern Ohio...
  Southwestern Morgan County in southeastern Ohio...
  Northern Athens County in southeastern Ohio...

* Until 845 PM EDT

* At 549 PM EDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Up to two inches of rain have
  already fallen. Flash flooding is expected to begin shortly.

* Some locations that will experience flooding include...
  Nelsonville, Glouster, Shawnee, Chesterhill, Chauncey, New
  Straitsville, Corning, Buchtel, Jacksonville, Murray City, Trimble,
  Hemlock, Amesville, Rendville and Burr Oak State Park.

Additional rainfall amounts of one to two inches are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.

Please report Severe Weather to the National Weather Service by
calling toll free, 800 401 9535, when you can do so safely.

You may also report severe weather by posting your report to the
Charleston West Virginia National Weather Service Facebook Page, or
by using the Twitter Hashtag, NWSRLX.

&&

LAT...LON 3954 8184 3931 8186 3944 8228 3947 8228
      3947 8217 3955 8216 3956 8226 3959 8226
      3960 8237 3961 8238 3971 8237

$$

Cooper

2 follow-up statements

808 
WGUS71 KRLX 102359
FFSRLX

Flash Flood Statement
National Weather Service Charleston WV
759 PM EDT MON JUL 10 2017

OHC009-115-127-110045-
/O.CON.KRLX.FF.W.0036.000000T0000Z-170711T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Perry OH-Morgan OH-Athens OH-
759 PM EDT MON JUL 10 2017

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 845 PM EDT FOR
SOUTHERN PERRY...SOUTHWESTERN MORGAN AND NORTHERN ATHENS COUNTIES...

At 757 PM EDT, Doppler radar indicated thunderstorms were moving out 
of the warned. However, up to two inches of rain have already 
fallen. Flash flooding is expected.

Some locations that will experience flooding include...
Nelsonville, Glouster, Shawnee, Chesterhill, Chauncey, New
Straitsville, Corning, Buchtel, Jacksonville, Murray City, Trimble,
Hemlock, Amesville, Rendville and Burr Oak State Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.

Please report Severe Weather to the National Weather Service by
calling toll free, 800 401 9535, when you can do so safely.

You may also report severe weather by posting your report to the
Charleston West Virginia National Weather Service Facebook Page, or
by using the Twitter Hashtag, NWSRLX.

&&

LAT...LON 3954 8184 3931 8186 3944 8228 3947 8228
      3947 8217 3955 8216 3956 8226 3959 8226
      3960 8237 3961 8238 3971 8237

$$

13

312 
WGUS71 KRLX 110045
FFSRLX

Flash Flood Statement
National Weather Service Charleston WV
845 PM EDT MON JUL 10 2017

OHC009-115-127-110051-
/O.EXP.KRLX.FF.W.0036.000000T0000Z-170711T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Perry OH-Morgan OH-Athens OH-
845 PM EDT MON JUL 10 2017

...THE FLASH FLOOD WARNING FOR SOUTHERN PERRY...SOUTHWESTERN MORGAN
AND NORTHERN ATHENS COUNTIES WILL EXPIRE AT 845 PM EDT...

The heavy rain has moved east of the area. Although the threat of 
flash flooding has diminished, run-off will continue in creeks and 
streams. Expect ponding of water to continue across low lying 
areas. Please continue to heed any remaining road closures.

LAT...LON 3954 8184 3931 8186 3944 8228 3947 8228
      3947 8217 3955 8216 3956 8226 3959 8226
      3960 8237 3961 8238 3971 8237

$$

13

The office that day

Everything else NWS Charleston, WV issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 10, 3:51 PM EDT	Severe Thunderstorm Warning	RLX	Perry	54 min
Jul 10, 4:45 PM EDT	Severe Thunderstorm Warning	RLX	Athens, Perry	60 min
Jul 10, 5:22 PM EDT	Special Weather Statement	RLX	Morgan	68 min
Jul 10, 5:32 PM EDT	Severe Thunderstorm Warning	RLX	Athens, Morgan, Perry, Washington	58 min
Jul 10, 5:49 PM EDT	Severe Thunderstorm Warning	RLX	Athens, Meigs, Vinton	56 min
Jul 10, 5:58 PM EDT	Special Weather Statement	RLX	Washington	62 min
Jul 10, 6:03 PM EDT	Tornado Warning	RLX	Athens, Washington	27 min
Jul 10, 6:10 PM EDT	Tornado Warning	RLX	Athens, Meigs	35 min
Jul 10, 6:25 PM EDT	Severe Thunderstorm Warning	RLX	Washington	28 min
Jul 10, 6:28 PM EDT	Severe Thunderstorm Warning	RLX	Washington	32 min
Jul 10, 6:29 PM EDT	Tornado Warning	RLX	Athens, Meigs, Washington	31 min
Jul 10, 7:05 PM EDT	Special Weather Statement	RLX	Perry	25 min
Jul 10, 7:14 PM EDT	Special Weather Statement	RLX	Meigs	61 min
Jul 10, 7:30 PM EDT	Severe Thunderstorm Warning	RLX	Athens, Meigs	47 min
Jul 10, 7:39 PM EDT	Tornado Warning	RLX	Meigs	36 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.