Alert archive / Ohio / Flash Flood Warnings in 2004

Flash Flood Warning 10, NWS Cleveland, OH

May 21, 2004Knox County, Marion County, Morrow County, Ohio

NWS Cleveland, OH issued this flash flood warning at May 21, 2004, 4:43 PM EDT for Knox County, Marion County, Morrow County, Ohio. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 21, 2004, 4:43 PM EDT (20:43 UTC)
Expired: May 21, 2004, 9:00 PM EDT
In force: 4 hr
Issued by: NWS Cleveland, OH
Area: Whole counties

Counties Knox County, OH, Marion County, OH, Morrow County, OH

The radar

The Cleveland radar (KCLE), 128 km from the middle of the area, began a volume at 20:44 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 12:00Z, 8.7 hours before the alert went out and 147 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: 2750 J/kg
Mixed-layer CIN: -38 J/kg
Mixed-layer LCL: 666 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 114 m²/s²
0-3 km storm-relative helicity: 96 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 4.3

Open this sounding in Storm Lab

The text

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

000 
WGUS51 KCLE 212044
FFWCLE
OHC083-101-117-220100-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CLEVELAND OH
443 PM EDT FRI MAY 21 2004

THE NATIONAL WEATHER SERVICE IN CLEVELAND HAS ISSUED A

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

* UNTIL 900 PM EDT

* AT 439 PM EDT WEATHER SERVICE RADAR INDICATED A LINE OF 
THUNDERSTORMS WITH VERY HEAVY RAINFALL OVER KNOX...MARION AND MORROW 
COUNTIES. RADAR ESTIMATES INDICATE RAINFALL RATES OF 2 TO 4 
INCHES PER HOUR. THIS RAINFALL COMBINED WITH THE RAINFALL FROM THIS 
MORNING MAY CAUSE DANGEROUS FLASH FLOODING.

THIS IS A VERY DANGEROUS SITUATION 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. VEHICLES CAUGHT IN RISING 
WATER SHOULD BE ABANDONED QUICKLY. MOVE TO HIGHER GROUND.

$$

MRD

The office that day

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

Issued	Product	Office	Counties	Lasted
May 20, 9:14 PM EDT	Special Marine Warning	CLE		2 hr
May 20, 11:12 PM EDT	Special Marine Warning	CLE		2 hr
May 20, 11:12 PM EDT	Special Marine Warning	CLE		2 hr
May 21, 1:24 AM EDT	Special Marine Warning	CLE		3 hr
May 21, 1:24 AM EDT	Special Marine Warning	CLE		3 hr
May 21, 1:24 AM EDT	Special Marine Warning	CLE		3 hr
May 21, 1:48 AM EDT	Severe Thunderstorm Warning	CLE	Cuyahoga, Lake	57 min
May 21, 2:26 AM EDT	Severe Thunderstorm Warning	CLE	Medina, Summit	64 min
May 21, 2:51 AM EDT	Severe Thunderstorm Warning	CLE	Cuyahoga, Lorain	54 min
May 21, 3:12 AM EDT	Flash Flood Warning	CLE	Crawford, Seneca, Wyandot	2 hr
May 21, 3:14 AM EDT	Flash Flood Warning	CLE	Lorain, Medina, Summit	3 hr
May 21, 3:53 AM EDT	Severe Thunderstorm Warning	CLE	Stark	67 min
May 21, 3:58 AM EDT	Severe Thunderstorm Warning	CLE	Wayne	62 min
May 21, 4:00 AM EDT	Severe Thunderstorm Warning	CLE	Mahoning	45 min
May 21, 4:06 AM EDT	Severe Thunderstorm Warning	CLE	Holmes	54 min
May 21, 1:42 PM EDT	Special Marine Warning	CLE		2 hr
May 21, 2:02 PM EDT	Severe Thunderstorm Warning	CLE	Lucas	58 min
May 21, 2:26 PM EDT	Severe Thunderstorm Warning	CLE	Ottawa, Sandusky, Wood	79 min
May 21, 2:55 PM EDT	Severe Thunderstorm Warning	CLE	Hancock, Seneca	65 min
May 21, 3:07 PM EDT	Severe Thunderstorm Warning	CLE	Erie	53 min
May 21, 3:16 PM EDT	Severe Thunderstorm Warning	CLE	Wyandot	59 min
May 21, 3:22 PM EDT	Severe Thunderstorm Warning	CLE	Crawford, Huron	53 min
May 21, 3:25 PM EDT	Flash Flood Warning	CLE	Hancock	3 hr
May 21, 3:25 PM EDT	Special Marine Warning	CLE		2 hr
May 21, 3:25 PM EDT	Special Marine Warning	CLE		2 hr
May 21, 3:25 PM EDT	Special Marine Warning	CLE		2 hr
May 21, 3:28 PM EDT	Severe Thunderstorm Warning	CLE	Lorain	62 min
May 21, 3:43 PM EDT	Severe Thunderstorm Warning	CLE	Cuyahoga, Medina	62 min
May 21, 3:44 PM EDT	Severe Thunderstorm Warning	CLE	Marion	61 min
May 21, 3:46 PM EDT	Severe Thunderstorm Warning	CLE	Morrow, Richland	59 min
May 21, 3:52 PM EDT	Flash Flood Warning	CLE	Wyandot	3 hr
May 21, 3:59 PM EDT	Severe Thunderstorm Warning	CLE	Ashland	61 min
May 21, 4:03 PM EDT	Severe Thunderstorm Warning	CLE	Knox	57 min
May 21, 4:05 PM EDT	Flash Flood Warning	CLE	Cuyahoga, Lorain, Medina	4 hr
May 21, 4:06 PM EDT	Severe Thunderstorm Warning	CLE	Summit, Wayne	54 min
May 21, 4:07 PM EDT	Tornado Warning	CLE	Richland	38 min
May 21, 4:11 PM EDT	Severe Thunderstorm Warning	CLE	Geauga, Lake	64 min
May 21, 4:11 PM EDT	Tornado Warning	CLE	Knox	64 min
May 21, 4:18 PM EDT	Severe Thunderstorm Warning	CLE	Portage	57 min
May 21, 4:23 PM EDT	Severe Thunderstorm Warning	CLE	Holmes, Stark	67 min
May 21, 4:40 PM EDT	Severe Thunderstorm Warning	CLE	Ashtabula, Mahoning, Trumbull	65 min
May 21, 4:55 PM EDT	Flash Flood Warning	CLE	Richland	4 hr
May 21, 5:04 PM EDT	Tornado Warning	CLE	Trumbull	26 min
May 21, 5:12 PM EDT	Tornado Warning	CLE	Ashtabula	33 min
May 21, 5:25 PM EDT	Flash Flood Warning	CLE	Ashtabula	4 hr

Nearby

Flash Flood Warnings in Ohio, 2004 Every flash flood warning in 2004

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.