Alert archive / Ohio / Flash Flood Warnings in 2011

Flash Flood Warning 37, NWS Charleston, WV

July 18, 2011Vinton County, Ohio

NWS Charleston, WV issued this flash flood warning at Jul 18, 2011, 7:58 PM EDT for Vinton County, Ohio. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 18, 2011, 7:58 PM EDT (23:58 UTC)
Expired: Jul 18, 2011, 10:51 PM EDT
In force: 3 hr
Issued by: NWS Charleston, WV
Area: Storm-based polygon
Flood severity: None

County Vinton County, OH

The radar

The Cincinnati radar (KILN), 123 km from the middle of the area, began a volume at 00:00 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 12:00Z, 12.0 hours before the alert went out and 121 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: 1057 J/kg
Mixed-layer CIN: -29 J/kg
Mixed-layer LCL: 878 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 9 m²/s²
0-3 km storm-relative helicity: 22 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

336 
WGUS51 KRLX 182358
FFWRLX
OHC163-190400-
/O.NEW.KRLX.FF.W.0037.110718T2358Z-110719T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CHARLESTON WV
758 PM EDT MON JUL 18 2011

THE NATIONAL WEATHER SERVICE IN CHARLESTON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHEASTERN VINTON COUNTY IN SOUTHEAST OHIO...
  THIS INCLUDES THE CITIES OF...MCARTHUR...LAKE HOPE STATE PARK...

* UNTIL MIDNIGHT EDT

* AT 753 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN FROM A THUNDERSTORM OVER THE WARNED AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

ADDITIONAL RAINFALL AMOUNTS OF AT LEAST ANOTHER 1.5 TO 2 INCHES ARE 
POSSIBLE IN THE WARNED AREA.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE SUBJECT TO FLOODING.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.

&&

PLEASE REPORT HIGH WATER TO THE NATIONAL WEATHER SERVICE BY CALLING
TOLL FREE...877-633-6772...WHEN YOU CAN DO SO SAFELY.

LAT...LON 3939 8234 3939 8230 3933 8229 3930 8230
      3929 8229 3926 8228 3923 8255 3938 8264
      3938 8252 3940 8251

$$

14

2 follow-up statements

886 
WGUS71 KRLX 190148
FFSRLX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON WV
948 PM EDT MON JUL 18 2011

OHC163-190400-
/O.CON.KRLX.FF.W.0037.000000T0000Z-110719T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
VINTON OH-
948 PM EDT MON JUL 18 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL MIDNIGHT EDT FOR
NORTHEASTERN VINTON COUNTY...

AT 912 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A THUNDERSTORM PRODUCING VERY HEAVY RAIN OVER THE WARNED
AREA.

THIS THUNDERSTORM WITH EXCESSIVE RAIN WILL OTHERWISE REMAIN OVER
MAINLY RURAL AREAS OF THE INDICATED COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE SUBJECT TO FLOODING.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.

TURN AROUND DON'T DROWN. DO NOT DRIVE YOUR CAR ON FLOODED ROADWAYS.

PLEASE REPORT HIGH WATER TO THE NATIONAL WEATHER SERVICE BY CALLING
TOLL FREE 877-633-6772 WHEN YOU CAN DO SO SAFELY.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM EDT
TUESDAY MORNING FOR SOUTHEAST OHIO AND CENTRAL WEST VIRGINIA.

&&

LAT...LON 3939 8234 3939 8230 3933 8229 3930 8230
      3929 8229 3926 8228 3923 8255 3938 8264
      3938 8252 3940 8251

$$

14

617 
WGUS71 KRLX 190251
FFSRLX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON WV
1051 PM EDT MON JUL 18 2011

OHC163-190300-
/O.CAN.KRLX.FF.W.0037.000000T0000Z-110719T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
VINTON OH-
1051 PM EDT MON JUL 18 2011

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR NORTHEASTERN VINTON
COUNTY...

HEAVY RAIN HAS MOVED OUT OF THE AREA...AS A RESULT THE FLASH FLOOD 
WARNING HAS BEEN CANCELLED. IN ADDITION...NO REPORTS OF FLASH 
FLOODING HAVE BEEN RECEIVED FOR VINTON COUNTY. LIGHT RAIN CAN BE 
EXPECTED THE NEXT HOUR OR SO BUT STREAMS AND CREEKS SHOULD REMAIN 
INSIDE THEIR BANKS.

TURN AROUND DON'T DROWN. DO NOT DRIVE YOUR CAR ON FLOODED ROADWAYS.

PLEASE REPORT HIGH WATER TO THE NATIONAL WEATHER SERVICE BY CALLING
TOLL FREE 877-633-6772 WHEN YOU CAN DO SO SAFELY.

LAT...LON 3939 8234 3939 8230 3933 8229 3930 8230
      3929 8229 3926 8228 3923 8255 3938 8264
      3938 8252 3940 8251

$$

14

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 18, 3:06 PM EDT	Heat Advisory	RLX	Athens, Gallia, Jackson, Lawrence, Meigs, Morgan and 3 more	29 hr
Jul 18, 4:30 PM EDT	Special Weather Statement	RLX	Perry	45 min
Jul 18, 5:09 PM EDT	Special Weather Statement	RLX	Morgan, Perry	51 min
Jul 18, 5:46 PM EDT	Severe Thunderstorm Warning	RLX	Morgan, Perry, Washington	44 min
Jul 18, 6:06 PM EDT	Special Weather Statement	RLX	Perry	24 min
Jul 18, 6:48 PM EDT	Special Weather Statement	RLX	Vinton	27 min
Jul 18, 7:21 PM EDT	Special Weather Statement	RLX	Vinton	24 min
Jul 18, 7:43 PM EDT	Special Weather Statement	RLX	Vinton	32 min

Nearby

Flash Flood Warnings in Ohio, 2011 Every flash flood warning in 2011

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.