Alert archive / Ohio / Flash Flood Warnings in 2011

Flash Flood Warning 18, NWS Cleveland, OH

May 14, 2011Ashtabula County, Trumbull County, Ohio

NWS Cleveland, OH issued this flash flood warning at May 14, 2011, 7:18 PM EDT for Ashtabula County, Trumbull County, Ohio. It was in force for 4 hr. 1 report 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 14, 2011, 7:18 PM EDT (23:18 UTC)
Expired: May 14, 2011, 11:00 PM EDT
In force: 4 hr
Issued by: NWS Cleveland, OH
Area: Storm-based polygon
Flood severity: None

Counties Ashtabula County, OH, Trumbull County, OH

The radar

The Pittsburgh radar (KPBZ), 91 km from the middle of the area, began a volume at 23:21 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 14, 9:15 PM EDT	FLASH FLOOD	Warren, OH	WIDESPREAD FLOODING WITH MANY ROADS IMPASSABLE. A LOT OF BASEMENT FLOODING ESPECIALLY IN HOWLAND TOWNSHIP. WATER WAS COMING INTO AN APARTMENT BUILDING.

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 12:00Z, 11.3 hours before the alert went out and 107 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: 108 J/kg
Mixed-layer CIN: -35 J/kg
Mixed-layer LCL: 673 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: -6 m²/s²
0-3 km storm-relative helicity: 38 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

682 
WGUS51 KCLE 142318
FFWCLE
OHC007-155-150300-
/O.NEW.KCLE.FF.W.0018.110514T2318Z-110515T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CLEVELAND OH
718 PM EDT SAT MAY 14 2011

THE NATIONAL WEATHER SERVICE IN CLEVELAND HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHERN ASHTABULA COUNTY IN NORTHEAST OHIO
  TRUMBULL COUNTY IN NORTHEAST OHIO

* UNTIL 1100 PM EDT

* AT 713 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL WILL MOVE       
  ACROSS NORTHERN TRUMBULL COUNTY AND SOUTHERN ASHTABULA COUNTIES.   
  RAIN WILL EVENTUALLY MOVE INTO SOUTHERN TRUMBULL COUNTY. THE       
  GROUND IS VERY SATURATED FROM RECENT RAINFALL ESPECIALLY ACROSS    
  SOUTHERN ASHTABULA AND NORTHERN TRUMBULL COUNTIES. UP TO TWO       
  INCHES OF RAIN MAY FALL IN LESS THAN 2 HOURS.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  WARREN...BRISTOLVILLE...CORTLAND...HUBBARD...KINSMAN...LORDSTOWN...
  NEWTON FALLS...NILES...NORTH BLOOMFIELD...ORWELL AND WEST
  FARMINGTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

VERY HEAVY RAINFALL IS POSSIBLE IN THE WARNED AREA. EXCESSIVE RUNOFF
WILL CAUSE FLOODING OF SMALL CREEKS...STREAMS...AND DRAINAGE DITCHES
ACROSS THE WARNING AREA. IN URBAN AREAS...FLOODING IS LIKELY ALONG
POORLY DRAINED AND LOW LYING HIGHWAYS...STREETS...AND UNDERPASSES. BE
ALERT FOR FLOODED ROADS. TURN AROUND...DON'T DROWN!

FLOODING IS OCCURRING OR IS IMMINENT. MOST FLOOD RELATED DEATHS OCCUR
IN AUTOMOBILES. NEVER ATTEMPT TO CROSS WATER COVERED BRIDGES...
DIPS...OR LOW WATER CROSSINGS. NEVER TRY TO CROSS A FLOWING STREAM...
EVEN A SMALL ONE...ON FOOT OR IN A VEHICLE. TURN AROUND...DON'T
DROWN!

&&

LAT...LON 4113 8052 4114 8099 4126 8100 4158 8100
      4158 8052 4115 8053 4114 8051

$$

KIELTYKA

The office that day

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

Issued	Product	Office	Counties	Lasted
May 13, 8:30 PM EDT	Areal Flood Advisory	CLE	Stark	3 hr
May 13, 9:42 PM EDT	Flash Flood Warning	CLE	Ashland	3 hr
May 14, 12:29 AM EDT	Areal Flood Advisory	CLE	Ashland	6 hr
May 14, 4:19 AM EDT	Flash Flood Watch	CLE	Ashland, Ashtabula, Crawford, Cuyahoga, Erie, Geauga and 22 more	19 hr
May 14, 1:59 PM EDT	Flash Flood Warning	CLE	Cuyahoga, Lorain	4 hr
May 14, 2:31 PM EDT	Flash Flood Warning	CLE	Hancock, Marion, Wyandot	2 hr
May 14, 3:24 PM EDT	Flash Flood Warning	CLE	Crawford, Huron, Knox, Morrow, Richland, Sandusky and 2 more	4 hr
May 14, 3:49 PM EDT	Flash Flood Warning	CLE	Ashland, Medina, Richland	4 hr
May 14, 4:07 PM EDT	Flash Flood Warning	CLE	Cuyahoga, Geauga, Lake	4 hr
May 14, 4:36 PM EDT	Flash Flood Warning	CLE	Holmes, Knox, Medina, Wayne	4 hr
May 14, 6:00 PM EDT	Areal Flood Warning	CLE	Cuyahoga, Lorain	5 hr
May 14, 6:07 PM EDT	Flash Flood Warning	CLE	Portage, Stark, Summit	4 hr
May 14, 6:22 PM EDT	Flash Flood Warning	CLE	Ashtabula	4 hr
May 14, 7:42 PM EDT	Areal Flood Warning	CLE	Ashland, Knox, Richland	4 hr
May 14, 7:50 PM EDT	Areal Flood Warning	CLE	Mahoning	4 hr

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.