Alert archive / Ohio / Flash Flood Warnings in 2011

Flash Flood Warning 46, NWS Charleston, WV

August 25, 2011Athens County, Morgan County, Washington County, Ohio

NWS Charleston, WV issued this flash flood warning at Aug 25, 2011, 6:37 AM EDT for Athens County, Morgan County, Washington County, Ohio. It was in force for 4 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: Aug 25, 2011, 6:37 AM EDT (10:37 UTC)
Expired: Aug 25, 2011, 10:30 AM EDT
In force: 4 hr
Issued by: NWS Charleston, WV
Area: Storm-based polygon
Flood severity: None

Counties Athens County, OH, Morgan County, OH, Washington County, OH

The radar

The Charleston,WV radar (KRLX), 129 km from the middle of the area, began a volume at 10:38 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
Aug 25, 9:30 AM EDT	HEAVY RAIN 3.5	4 S Burr Oak State Park, OH	RAIN FELL BETWEEN 230AM AND 930AM
Aug 25, 9:35 AM EDT	FLASH FLOOD	Nelsonville, OH	RT 33 FLOODED IN NELSONVILLE

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 00:00Z, 10.6 hours before the alert went out and 153 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: 3854 J/kg
Mixed-layer CIN: -17 J/kg
Mixed-layer LCL: 1316 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 85 m²/s²
0-3 km storm-relative helicity: 184 m²/s²
Significant tornado parameter: 1.8
Supercell composite: 15.7

Open this sounding in Storm Lab

The text

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

205 
WGUS51 KRLX 251037
FFWRLX
OHC009-115-167-251430-
/O.NEW.KRLX.FF.W.0046.110825T1037Z-110825T1430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CHARLESTON WV
637 AM EDT THU AUG 25 2011

THE NATIONAL WEATHER SERVICE IN CHARLESTON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN ATHENS COUNTY IN SOUTHEAST OHIO...
  THIS INCLUDES THE CITIES OF...NELSONVILLE...GLOUSTER...
  SOUTHERN MORGAN COUNTY IN SOUTHEAST OHIO...
  THIS INCLUDES THE CITY OF CHESTERHILL...
  WEST CENTRAL WASHINGTON COUNTY IN SOUTHEAST OHIO...

* UNTIL 1030 AM EDT

* AT 623 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  HEAVY RAIN FROM REPETITIVE THUNDERSTORMS OVER THE WARNED AREA.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO TRIMBLE...
  JACKSONVILLE AND BUCHTEL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

SOME OF THE CREEKS AND SMALL STREAMS MORE VULNERABLE INCLUDE... 
SUNDAY CREEK...MONDAY CREEK...FEDERAL CREEK...AND COAL RUN. SOME OF 
THESE CREEKS AND OTHER SMALL STREAMS COULD BECOME OUT OF ITS BANKS 
THROUGH 1030 AM. 

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.

IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY. 
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE 
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. 

TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN
CHARLESTON.

&&

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

LAT...LON 3942 8176 3942 8184 3938 8199 3936 8210
      3939 8229 3947 8229 3948 8228 3947 8218
      3951 8217 3950 8194 3953 8165

$$

08

2 follow-up statements

493 
WGUS71 KRLX 251305
FFSRLX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON WV
905 AM EDT THU AUG 25 2011

OHC009-115-167-251430-
/O.CON.KRLX.FF.W.0046.000000T0000Z-110825T1430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ATHENS OH-MORGAN OH-WASHINGTON OH-
905 AM EDT THU AUG 25 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1030 AM EDT FOR WEST
CENTRAL WASHINGTON...SOUTHERN MORGAN AND NORTHERN ATHENS COUNTIES...

AT 900 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A THUNDERSTORM PRODUCING FLASH FLOODING OVER THE WARNED
AREA.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
NELSONVILLE...GLOUSTER AND CHESTERHILL

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED 
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

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 3942 8176 3942 8184 3938 8199 3936 8210
      3939 8229 3947 8229 3948 8228 3947 8218
      3951 8217 3950 8194 3953 8165

$$

28

475 
WGUS71 KRLX 251422
FFSRLX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON WV
1022 AM EDT THU AUG 25 2011

OHC009-115-167-251432-
/O.EXP.KRLX.FF.W.0046.000000T0000Z-110825T1430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ATHENS OH-MORGAN OH-WASHINGTON OH-
1022 AM EDT THU AUG 25 2011

...THE FLASH FLOOD WARNING WILL EXPIRE AT 1030 AM EDT FOR WEST
CENTRAL WASHINGTON...SOUTHERN MORGAN AND NORTHERN ATHENS COUNTIES...

HEAVY RAIN IS NO LONGER ANTICIPATED...THEREFORE THE FLASH FLOOD
WARNING THAT WAS IN EFFECT HAS BEEN ALLOWED TO EXPIRE. STREAMS AND
CREEKS HAVE BEGUN TO RECEDE AND NO LONGER POSE A FLASH FLOOD THREAT.

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 3942 8176 3942 8184 3938 8199 3936 8210
      3939 8229 3947 8229 3948 8228 3947 8218
      3951 8217 3950 8194 3953 8165

$$

28

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 25, 5:18 AM EDT	Special Weather Statement	RLX	Athens, Morgan	57 min
Aug 25, 7:02 AM EDT	Special Weather Statement	RLX	Washington	43 min
Aug 25, 8:00 AM EDT	Flash Flood Warning	RLX	Morgan, Washington	2 hr
Aug 25, 8:28 AM EDT	Special Weather Statement	RLX	Athens, Gallia, Jackson, Meigs	47 min
Aug 25, 9:24 AM EDT	Special Weather Statement	RLX	Gallia, Lawrence	66 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.