Alert archive / Ohio / Flash Flood Warnings in 2012

Flash Flood Warning 20, NWS Charleston, WV

May 8, 2012Athens County, Meigs County, Washington County, Ohio; Wood County, West Virginia

NWS Charleston, WV issued this flash flood warning at May 8, 2012, 4:54 AM EDT for Athens County, Meigs County, Washington County, Ohio; Wood County, West Virginia. 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: May 8, 2012, 4:54 AM EDT (08:54 UTC)
Expired: May 8, 2012, 8:45 AM EDT
In force: 4 hr
Issued by: NWS Charleston, WV
Area: Storm-based polygon
Flood severity: None

Counties Athens County, OH, Meigs County, OH, Washington County, OH, Wood County, WV

The radar

The Charleston,WV radar (KRLX), 110 km from the middle of the area, began a volume at 08:57 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 8, 6:00 AM EDT	FLASH FLOOD	2 S Vienna, WV	WATER OVER THE ROAD AT THE INTERSECTION OF LAKEVIEW DR. AND PARKVIEW DR.
May 8, 8:02 AM EDT	FLASH FLOOD	5 Nw Forked Run State Pa, OH	SR 7 CLOSED 23MIN DUE TO HIGH WATER OVER THE ROAD.

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

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 00:00Z, 8.9 hours before the alert went out and 175 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: 920 J/kg
Mixed-layer CIN: -30 J/kg
Mixed-layer LCL: 1102 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 121 m²/s²
0-3 km storm-relative helicity: 208 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 3.2

Open this sounding in Storm Lab

The text

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

971 
WGUS51 KRLX 080854
FFWRLX
OHC009-105-167-WVC107-081245-
/O.NEW.KRLX.FF.W.0020.120508T0854Z-120508T1245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CHARLESTON WV
454 AM EDT TUE MAY 8 2012

THE NATIONAL WEATHER SERVICE IN CHARLESTON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WOOD COUNTY IN WEST VIRGINIA...
  THIS INCLUDES THE CITY OF PARKERSBURG...
  SOUTHEASTERN ATHENS COUNTY IN SOUTHEAST OHIO...
  THIS INCLUDES THE CITY OF COOLVILLE...
  NORTHERN MEIGS COUNTY IN SOUTHEAST OHIO...
  THIS INCLUDES THE CITY OF FORKED RUN STATE PARK...
  WASHINGTON COUNTY IN SOUTHEAST OHIO...
  THIS INCLUDES THE CITIES OF...MARIETTA...BELPRE...

* UNTIL 845 AM EDT

* AT 440 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  REPETITIVE SHOWERS PRODUCING LOCAL DOWNPOURS OVER THE 
  WARNED AREA. RAIN GAUGES IN THE AREA HAVE ALREADY REPORTED SOME   
  AMOUNTS OF 1.0 TO 1.5 INCHES OF RAIN BETWEEN 1 AND 5 O'CLOCK.

* ADDITIONAL LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED 
  TO WILLIAMSTOWN...WASHINGTON...VIENNA...LUBECK AND BOAZ.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

ADDITIONAL RAINFALL AMOUNTS OF A HALF INCH TO AN INCH ARE EXPECTED 
THROUGH 8 AM...AS THE REPETITIVE SHOWERS CONTINUE. THIS COULD CAUSE 
VULNERABLE SMALL STREAMS TO FLOOD. 

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.

&&

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

LAT...LON 3961 8125 3958 8125 3958 8104 3939 8122
      3940 8126 3934 8137 3928 8125 3919 8130
      3914 8143 3903 8158 3910 8175 3908 8181
      3904 8180 3904 8192 3908 8208 3914 8217
      3923 8210 3961 8137

$$

16

2 follow-up statements

478 
WGUS71 KRLX 081040
FFSRLX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON WV
640 AM EDT TUE MAY 8 2012

OHC009-105-167-WVC107-081245-
/O.CON.KRLX.FF.W.0020.000000T0000Z-120508T1245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ATHENS OH-MEIGS OH-WASHINGTON OH-WOOD WV-
640 AM EDT TUE MAY 8 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 845 AM EDT FOR
WOOD...WASHINGTON...NORTHEASTERN MEIGS AND SOUTHEASTERN ATHENS
COUNTIES...

AT 630 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE REPETITIVE SHOWERS PRODUCING LOCAL DOWNPOURS OVER THE 
WARNED AREA. DOPPLER RADAR AND RAIN GAUGES INDICATE RAINFALL RATES 
OF ONE QUARTER TO ONE HALF OF AN INCH PER HOUR. A DOWNWARD TREND IN 
SHOWER INTENSITIES IS EXPECTED BETWEEN 7 AND 8 AM.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO MARIETTA...
BELPRE...WILLIAMSTOWN...VIENNA AND BOAZ

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. 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 3961 8125 3958 8125 3958 8104 3939 8122
      3940 8126 3934 8137 3928 8125 3919 8130
      3914 8143 3903 8158 3910 8175 3908 8181
      3904 8180 3904 8192 3908 8208 3914 8217
      3923 8210 3961 8137

$$

16

672 
WGUS71 KRLX 081242
FFSRLX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON WV
842 AM EDT TUE MAY 8 2012

OHC009-105-167-WVC107-081251-
/O.EXP.KRLX.FF.W.0020.000000T0000Z-120508T1245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ATHENS OH-MEIGS OH-WASHINGTON OH-WOOD WV-
842 AM EDT TUE MAY 8 2012

...THE FLASH FLOOD WARNING WILL EXPIRE AT 845 AM EDT FOR WOOD...
WASHINGTON...NORTHEASTERN MEIGS AND SOUTHEASTERN 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 EITHER CRESTED, OR ARE IN CREST, OR 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 3961 8125 3958 8125 3958 8104 3939 8122
      3940 8126 3934 8137 3928 8125 3919 8130
      3914 8143 3903 8158 3910 8175 3908 8181
      3904 8180 3904 8192 3908 8208 3914 8217
      3923 8210 3961 8137

$$

21

The office that day

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

Issued	Product	Office	Counties	Lasted
May 7, 9:32 PM EDT	Flash Flood Watch	RLX	Athens, Gallia, Jackson, Lawrence, Meigs, Morgan and 3 more	16 hr
May 8, 1:46 AM EDT	Special Weather Statement	RLX	Meigs, Washington	119 min
May 8, 4:03 AM EDT	Special Weather Statement	RLX	Gallia, Meigs, Washington	27 min
May 8, 5:26 AM EDT	Special Weather Statement	RLX	Gallia	19 min
May 8, 5:57 AM EDT	Special Weather Statement	RLX	Gallia	48 min
May 8, 9:01 AM EDT	Special Weather Statement	RLX	Lawrence	44 min
May 8, 9:38 AM EDT	Special Weather Statement	RLX	Athens	37 min

Nearby

Flash Flood Warnings in Ohio, 2012 Flash Flood Warnings in West Virginia, 2012 Every flash flood warning in 2012

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.