Alert archive / Ohio / Flash Flood Warnings in 2011

Flash Flood Warning 21, NWS Cleveland, OH

May 25, 20116 counties in Ohio

NWS Cleveland, OH issued this flash flood warning at May 25, 2011, 7:21 PM EDT for 6 counties in Ohio. It was in force for 6 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 25, 2011, 7:21 PM EDT (23:21 UTC)
Expired
May 26, 2011, 1:30 AM EDT
In force
6 hr
Issued by
NWS Cleveland, OH
Area
Storm-based polygon
Flood severity
None

Counties Ashland County, OH, Crawford County, OH, Marion County, OH, Morrow County, OH, Richland County, OH, Wyandot County, OH

The radar

The Cleveland radar (KCLE), 108 km from the middle of the area, began a volume at 23:25 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 25, 8:40 PM EDTFLOODMansfield, OHSTREAMS OVER ROADS AND BRIDGES.

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, 11.4 hours before the alert went out and 168 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 2011-05-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 49 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 2011-05-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 80 square meters per square second.193958Sfc1 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
49 J/kg
Mixed-layer CIN
-199 J/kg
Mixed-layer LCL
1232 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
80 m²/s²
0-3 km storm-relative helicity
166 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

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

545 
WGUS51 KCLE 252321
FFWCLE
OHC005-033-101-117-139-175-260530-
/O.NEW.KCLE.FF.W.0021.110525T2321Z-110526T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CLEVELAND OH
721 PM EDT WED MAY 25 2011

THE NATIONAL WEATHER SERVICE IN CLEVELAND HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  ASHLAND COUNTY IN NORTH CENTRAL OHIO
  MARION COUNTY IN NORTH CENTRAL OHIO
  MORROW COUNTY IN NORTH CENTRAL OHIO
  RICHLAND COUNTY IN NORTH CENTRAL OHIO
  SOUTHEASTERN WYANDOT COUNTY IN NORTHWEST OHIO
  SOUTHERN CRAWFORD COUNTY IN NORTH CENTRAL OHIO

* UNTIL 130 AM EDT THURSDAY

* AT 713 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  THUNDERSTORMS WITH HEAVY RAINFALL ENTERING THE
  WARNED AREA. DOPPLER RADAR ESTIMATED RAINFALL RATES OF ONE TO ONE
  AND A HALF INCHES AN HOUR. AN ADDITIONAL ONE TO TWO INCHES OF 
  RAINFALL IS POSSIBLE THROUGH THE EVENING.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  ASHLAND...MANSFIELD...MARION...MOUNT GILEAD...BELLVILLE...
  CARDINGTON...GALION...HAYESVILLE...LA
  RUE...LEXINGTON...LOUDONVILLE...MARSEILLES...ONTARIO...
  POLK...PROSPECT...SHELBY...AND WALDO.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

FLOODING IS OCCURRING OR IS IMMINENT. IF CAMPING OR HIKING...IT IS
IMPORTANT TO KNOW WHERE YOU ARE RELATIVE TO STREAMS...RIVERS...OR
CREEKS WHICH CAN RAPIDLY RISE DURING HEAVY RAINS. CAMPERS AND HIKERS
IN THE WARNING AREA SHOULD MOVE UPHILL AWAY FROM STREAMS AND CREEKS.

&&

LAT...LON 4036 8292 4042 8293 4045 8324 4051 8326
      4051 8342 4069 8341 4072 8344 4079 8272
      4099 8270 4099 8244 4106 8244 4106 8217
      4099 8217 4099 8213 4067 8212 4066 8222
      4056 8224 4055 8264 4035 8265

$$
1 follow-up statement
703 
WGUS71 KCLE 260220
FFSCLE

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CLEVELAND OH
1020 PM EDT WED MAY 25 2011

OHC005-033-101-117-139-175-260530-
/O.CON.KCLE.FF.W.0021.000000T0000Z-110526T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ASHLAND OH-WYANDOT OH-CRAWFORD OH-MARION OH-MORROW OH-RICHLAND OH-
1020 PM EDT WED MAY 25 2011

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR RICHLAND...MORROW...
MARION...SOUTHERN CRAWFORD AND ASHLAND COUNTIES IN NORTH CENTRAL
OHIO...AND SOUTHEASTERN WYANDOT COUNTY IN NORTHWEST OHIO UNTIL 130 AM
EDT...

AT 1006 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS WITH VERY HEAVY RAINFALL ADVANCING TOWARDS THE WARNED AREA
FROM THE SOUTHWEST. THESE STORMS WILL BRING AN ADDITIONAL HALF INCH OF
RAIN OR GREATER. 

THIS RAIN IN COMBINATION OF THE EARLIER RAINFALL WILL PRODUCE SIGNIFICANT
RUNOFF. IN ADDITION TO FLOODING...THIS RUNOFF COULD TRIGGER DEBRIS SLIDES
IN HILLY TERRAIN. 

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...ASHLAND...MANSFIELD...
MARION...MOUNT GILEAD...BELLVILLE...CARDINGTON...CHESTERVILLE...GALION...
HAYESVILLE...LA RUE...LEXINGTON...LOUDONVILLE...MARSEILLES...MORRAL...
ONTARIO...POLK...PROSPECT...SAVANNAH...SHELBY...SPARTA AND WALDO.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

FLOODING IS OCCURRING OR IS IMMINENT. IF CAMPING...IT IS
IMPORTANT TO KNOW WHERE YOU ARE RELATIVE TO STREAMS...RIVERS...OR
CREEKS WHICH CAN RAPIDLY RISE DURING HEAVY RAINS. CAMPERS AND HIKERS
IN THE WARNING AREA SHOULD MOVE UPHILL AWAY FROM STREAMS AND CREEKS.

&&

LAT...LON 4036 8292 4042 8293 4045 8324 4051 8326
      4051 8342 4069 8341 4072 8344 4079 8272
      4099 8270 4099 8244 4106 8244 4106 8217
      4099 8217 4099 8213 4067 8212 4066 8222
      4056 8224 4055 8264 4035 8265

$$

The office that day

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

IssuedProductOfficeCountiesLasted
May 25, 2:16 PM EDTFlood WatchCLEAshland, Crawford, Erie, Hancock, Huron, Knox and 10 more14 hr
May 25, 2:47 PM EDTAreal Flood WarningCLELucas, Wood16 hr
May 25, 2:57 PM EDTSpecial Marine WarningCLE2 hr
May 25, 3:33 PM EDTSevere Thunderstorm WarningCLELucas, Wood57 min
May 25, 4:03 PM EDTSevere Thunderstorm WarningCLELucas, Ottawa, Sandusky57 min
May 25, 4:10 PM EDTSevere Thunderstorm WarningCLEHancock50 min
May 25, 4:24 PM EDTTornado WarningCLEHancock51 min
May 25, 4:25 PM EDTAreal Flood WarningCLEHancock14 hr
May 25, 4:57 PM EDTTornado WarningCLEHancock, Sandusky, Seneca, Wood63 min
May 25, 5:01 PM EDTSpecial Marine WarningCLE119 min
May 25, 5:15 PM EDTAreal Flood WarningCLEOttawa, Sandusky, Seneca13 hr
May 25, 5:24 PM EDTTornado WarningCLESandusky, Seneca51 min
May 25, 5:34 PM EDTTornado WarningCLEHancock41 min
May 25, 5:48 PM EDTSevere Thunderstorm WarningCLEErie, Huron42 min
May 25, 5:54 PM EDTSevere Thunderstorm WarningCLEHancock, Seneca, Wyandot51 min
May 25, 6:00 PM EDTAreal Flood WarningCLECrawford, Erie, Huron, Wyandot12 hr
May 25, 6:03 PM EDTTornado WarningCLEErie, Huron57 min
May 25, 6:17 PM EDTSevere Thunderstorm WarningCLEAshland, Richland58 min
May 25, 6:26 PM EDTSevere Thunderstorm WarningCLELorain49 min
May 25, 6:36 PM EDTSevere Thunderstorm WarningCLECrawford, Huron, Seneca54 min
May 25, 6:42 PM EDTAreal Flood WarningCLECuyahoga, Huron, Lorain, Medina5 hr
May 25, 6:44 PM EDTSpecial Marine WarningCLE2 hr
May 25, 6:45 PM EDTSevere Thunderstorm WarningCLECuyahoga45 min
May 25, 6:53 PM EDTSevere Thunderstorm WarningCLELorain, Medina67 min
May 25, 7:00 PM EDTSevere Thunderstorm WarningCLECrawford, Marion, Wyandot60 min
May 25, 7:01 PM EDTSpecial Marine WarningCLE119 min
May 25, 7:09 PM EDTFlash Flood WarningCLECuyahoga, Lorain, Medina4 hr
May 25, 7:19 PM EDTSevere Thunderstorm WarningCLEGeauga, Lake41 min
May 25, 7:20 PM EDTSevere Thunderstorm WarningCLEPortage, Summit40 min
May 25, 7:31 PM EDTTornado WarningCLESummit29 min
May 25, 7:37 PM EDTSevere Thunderstorm WarningCLEAshland, Wayne38 min
May 25, 7:42 PM EDTAreal Flood WarningCLEGeauga, Lake, Portage, Summit, Wayne5 hr
May 25, 7:50 PM EDTSevere Thunderstorm WarningCLEAshtabula55 min

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.