Alert archive / Ohio / Flash Flood Warnings in 2011

Flash Flood Warning 12, NWS Cleveland, OH

May 14, 20118 counties in Ohio

NWS Cleveland, OH issued this flash flood warning at May 14, 2011, 3:24 PM EDT for 8 counties in 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, 3:24 PM EDT (19:24 UTC)
Expired
May 14, 2011, 7:30 PM EDT
In force
4 hr
Issued by
NWS Cleveland, OH
Area
Storm-based polygon
Flood severity
None

Counties Crawford County, OH, Huron County, OH, Knox County, OH, Morrow County, OH, Richland County, OH, Sandusky County, OH, Seneca County, OH, Wyandot County, OH

The radar

The Cleveland radar (KCLE), 123 km from the middle of the area, began a volume at 19:24 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

TimeReportWhereRemark
May 14, 4:18 PM EDTFLASH FLOODTiffin, OHRAILROAD UNDERPASS FLOODED AND MOTORIST HAD TO BE RESCUED.

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, 7.4 hours before the alert went out and 155 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-pSkew-T log-p diagram, Cncnati-Daytn, OH at 12:00Z on 2011-05-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 421 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Cncnati-Daytn, OH at 12:00Z on 2011-05-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -9 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
421 J/kg
Mixed-layer CIN
-13 J/kg
Mixed-layer LCL
609 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
-9 m²/s²
0-3 km storm-relative helicity
41 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.

731 
WGUS51 KCLE 141924
FFWCLE
OHC033-077-083-117-139-143-147-175-142330-
/O.NEW.KCLE.FF.W.0012.110514T1924Z-110514T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

THE NATIONAL WEATHER SERVICE IN CLEVELAND HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CRAWFORD COUNTY IN NORTH CENTRAL OHIO
  EASTERN WYANDOT COUNTY IN NORTHWEST OHIO
  MORROW COUNTY IN NORTH CENTRAL OHIO
  SENECA COUNTY IN NORTHWEST OHIO
  SOUTHEASTERN SANDUSKY COUNTY IN NORTHWEST OHIO
  WESTERN HURON COUNTY IN NORTH CENTRAL OHIO
  WESTERN KNOX COUNTY IN NORTH CENTRAL OHIO
  WESTERN RICHLAND COUNTY IN NORTH CENTRAL OHIO

* UNTIL 730 PM EDT

* AT 320 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE      
  WARNED AREA. RAINFALL AMOUNTS OVER AN INCH MAY HAVE FALLEN ALREADY 
  AND ANOTHER 1 TO 2 INCHES OF RAIN MAY FALL IN A SHORT TIME AT SOME 
  LOCATIONS.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  BUCYRUS...FOSTORIA...MANSFIELD...MOUNT GILEAD...NORWALK...         
  SYCAMORE...TIFFIN...UPPER SANDUSKY...BELLEVUE...NEW                
  WASHINGTON...ONTARIO...PLYMOUTH...SHELBY...SPARTA AND WILLARD.

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!

&&

LAT...LON 4027 8272 4028 8275 4035 8274 4036 8286
      4071 8286 4070 8326 4082 8336 4100 8343
      4126 8341 4128 8259 4072 8250 4026 8249

$$

KIELTYKA
1 follow-up statement
885 
WGUS71 KCLE 142116
FFSCLE

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CLEVELAND OH
516 PM EDT SAT MAY 14 2011

OHC033-077-083-117-139-143-147-175-142330-
/O.CON.KCLE.FF.W.0012.000000T0000Z-110514T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WYANDOT OH-CRAWFORD OH-HURON OH-KNOX OH-MORROW OH-RICHLAND OH-
SENECA OH-SANDUSKY OH-
516 PM EDT SAT MAY 14 2011

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR WESTERN RICHLAND...
MORROW...WESTERN KNOX...WESTERN HURON AND CRAWFORD COUNTIES IN NORTH
CENTRAL OHIO...AND SOUTHERN SANDUSKY...SENECA AND WYANDOT COUNTIES IN
NORTHWEST OHIO UNTIL 730 PM EDT...

AT 506 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THAT THE THUNDERSTORMS WITH THE HEAVIEST RAINFALL WAS LOCATED OVER 
NORTHEAST MORROW COUNTY AND WESTERN RICHLAND COUNTY. THE 
THUNDERSTORMS WERE MOVING SLOWLY NORTHEAST. THE RAINFALL RATES WERE 
DECREASING...ANOTHER INCH OF RAIN COULD FALL FROM THESE 
THUNDERSTORMS. ELSEWHERE THE HEAVY RAIN HAS DECREASED BUT SINCE THE 
GROUND IS SATURATED ANY HIGH WATER WILL BE SLOW TO RECEDE. 

SLOW MOVING THUNDERSTORMS ARE PRODUCING VERY HEAVY RAINFALL IN THE
WARNED AREA. RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH 
FLOODING TO OCCUR. 

SOME FLOODING WAS REPORTED IN TIFFIN JUST AFTER 4 PM. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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. TURN AROUND...DON'T DROWN!

&&

LAT...LON 4027 8272 4028 8275 4035 8274 4036 8286
      4071 8286 4070 8326 4082 8336 4100 8343
      4126 8341 4128 8259 4072 8250 4026 8249

$$

KIELTYKA

The office that day

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

IssuedProductOfficeCountiesLasted
May 13, 8:30 PM EDTAreal Flood AdvisoryCLEStark3 hr
May 13, 9:42 PM EDTFlash Flood WarningCLEAshland3 hr
May 14, 12:29 AM EDTAreal Flood AdvisoryCLEAshland6 hr
May 14, 4:19 AM EDTFlash Flood WatchCLEAshland, Ashtabula, Crawford, Cuyahoga, Erie, Geauga and 22 more19 hr
May 14, 1:59 PM EDTFlash Flood WarningCLECuyahoga, Lorain4 hr
May 14, 2:31 PM EDTFlash Flood WarningCLEHancock, Marion, Wyandot2 hr
May 14, 3:49 PM EDTFlash Flood WarningCLEAshland, Medina, Richland4 hr
May 14, 4:07 PM EDTFlash Flood WarningCLECuyahoga, Geauga, Lake4 hr
May 14, 4:36 PM EDTFlash Flood WarningCLEHolmes, Knox, Medina, Wayne4 hr
May 14, 6:00 PM EDTAreal Flood WarningCLECuyahoga, Lorain5 hr
May 14, 6:07 PM EDTFlash Flood WarningCLEPortage, Stark, Summit4 hr
May 14, 6:22 PM EDTFlash Flood WarningCLEAshtabula4 hr
May 14, 7:18 PM EDTFlash Flood WarningCLEAshtabula, Trumbull4 hr
May 14, 7:42 PM EDTAreal Flood WarningCLEAshland, Knox, Richland4 hr
May 14, 7:50 PM EDTAreal Flood WarningCLEMahoning4 hr

Nearby

Flash Flood Warnings in Ohio, 2011Every 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.