Alert archive / Ohio / Flash Flood Warnings in 2007

Flash Flood Warning 5, NWS Cleveland, OH

July 19, 2007Knox County, Ohio

NWS Cleveland, OH issued this flash flood warning at Jul 19, 2007, 3:35 AM EDT for Knox County, Ohio. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 19, 2007, 3:35 AM EDT (07:35 UTC)
Expired
Jul 19, 2007, 9:30 AM EDT
In force
6 hr
Issued by
NWS Cleveland, OH
Area
Counties, with a storm outline in the text
Flood severity
None

County Knox County, OH

The radar

The Cleveland radar (KCLE), 113 km from the middle of the area, began a volume at 07:35 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.

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 00:00Z, 7.6 hours before the alert went out and 165 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 00:00Z on 2007-07-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 691 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 00:00Z on 2007-07-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 120 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
691 J/kg
Mixed-layer CIN
-38 J/kg
Mixed-layer LCL
1319 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
120 m²/s²
0-3 km storm-relative helicity
188 m²/s²
Significant tornado parameter
0.2
Supercell composite
4.7

Open this sounding in Storm Lab

The text

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

000 
WGUS51 KCLE 190735
FFWCLE
OHC083-191330-
/X.NEW.KCLE.FF.W.0005.070719T0735Z-070719T1330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CLEVELAND OH
335 AM EDT THU JUL 19 2007

THE NATIONAL WEATHER SERVICE IN CLEVELAND HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  KNOX COUNTY IN NORTH CENTRAL OHIO

* UNTIL 930 AM EDT

* AT 329 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
FLASH FLOODING FROM THUNDERSTORMS OVER NORTHERN KNOX COUNTY. SINCE 
MIDNIGHT...RADAR INDICATED THAT 2 TO 4 INCHES OF RAIN HAS FALLEN 
ACROSS NORTHERN KNOX COUNTY. ADDITIONAL THUNDERSTORMS MOVING 
THROUGH THE AREA WILL CAUSE ANOTHER 1 TO 2 INCHES OF RAIN TO FALL 
THROUGH 5 AM.

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.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

LAT...LON 4046 8263 4042 8218 4057 8217 4055 8260

$$

MRD
2 follow-up statements
000 
WGUS71 KCLE 191058
FFSCLE

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CLEVELAND OH
657 AM EDT THU JUL 19 2007

OHC083-191330-
/X.CON.KCLE.FF.W.0005.000000T0000Z-070719T1330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KNOX OH-
657 AM EDT THU JUL 19 2007

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 930 AM EDT FOR
NORTHERN KNOX COUNTY...

ALTHOUGH THE RAIN HAS DIMINISHED ACROSS THE REGION...NATIONAL 
WEATHER SERVICE DOPPLER RADAR INDICATED THAT 2 TO 4 INCHES OF RAIN 
FELL OVERNIGHT ACROSS NORTHERN KNOX COUNTY. SOME SMALL STREAMS AND 
RURAL ROADWAYS MAY BE FLOODED...ESPECIALLY NEAR DANVILLE AND GANN.

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. REMEMBER...TURN AROUND DONT DROWN.

LAT...LON 4046 8263 4042 8218 4057 8217 4055 8260

$$

MRD
000 
WGUS71 KCLE 191333
FFSCLE

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CLEVELAND OH
933 AM EDT THU JUL 19 2007

OHC083-191339-
/X.EXP.KCLE.FF.W.0005.000000T0000Z-070719T1330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KNOX OH-
933 AM EDT THU JUL 19 2007

...THE FLASH FLOOD WARNING EXPIRED AT 930 AM EDT FOR NORTHERN KNOX 
COUNTY...

THE HEAVY RAIN THAT AFFECTED THE REGION EARLIER THIS MORNING HAS 
MOVED EAST. RAINFALL AMOUNTS BETWEEN 4 AND 5 INCHES FELL ACROSS 
PARTS OF EXTREME NORTHEAST KNOX COUNTY. MANY CREEKS AND STREAMS 
REMAIN HIGH AND PEOPLE IN THESE AREAS SHOULD REMAIN AWRARE AS MORE 
SHOWERS AND THUNDERSTORMS ARE LIKELY LATER THIS MORNING AND 
AFTERNOON.

LAT...LON 4046 8263 4042 8218 4057 8217 4055 8260

$$
BM

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 18, 8:46 PM EDTSevere Thunderstorm WarningCLEAshtabula59 min
Jul 18, 9:47 PM EDTSevere Thunderstorm WarningCLELucas58 min
Jul 18, 9:55 PM EDTSpecial Marine WarningCLE95 min
Jul 18, 10:42 PM EDTSevere Thunderstorm WarningCLEAshtabula63 min
Jul 18, 11:10 PM EDTSpecial Marine WarningCLE2 hr
Jul 18, 11:12 PM EDTFlash Flood WatchCLEAshland, Crawford, Hancock, Holmes, Huron, Knox and 10 more6 hr
Jul 18, 11:42 PM EDTSpecial Marine WarningCLE2 hr
Jul 19, 12:11 AM EDTAreal Flood AdvisoryCLEAshtabula6 hr
Jul 19, 12:26 AM EDTSevere Thunderstorm WarningCLEAshtabula64 min
Jul 19, 1:04 AM EDTSevere Thunderstorm WarningCLEHolmes56 min
Jul 19, 1:15 AM EDTAreal Flood AdvisoryCLEHolmes6 hr
Jul 19, 2:54 AM EDTSevere Thunderstorm WarningCLEMorrow51 min
Jul 19, 3:08 AM EDTFlash Flood WarningCLEHolmes6 hr
Jul 19, 3:13 AM EDTAreal Flood AdvisoryCLEAshland, Knox, Marion, Morrow, Richland6 hr
Jul 19, 6:05 AM EDTMarine Weather StatementCLE115 min
Jul 19, 2:26 PM EDTMarine Weather StatementCLE2 hr
Jul 19, 4:55 PM EDTMarine Weather StatementCLE65 min
Jul 19, 5:29 PM EDTSpecial Marine WarningCLE2 hr
Jul 19, 6:34 PM EDTSevere Thunderstorm WarningCLECuyahoga38 min
Jul 19, 7:24 PM EDTSevere Thunderstorm WarningCLEPortage, Summit41 min

Nearby

Flash Flood Warnings in Ohio, 2007Every flash flood warning in 2007

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.