Alert archive / Ohio / Flash Flood Warnings in 2021

Flash Flood Warning 20, NWS Cleveland, OH

July 29, 2021Ashtabula County, Ohio

NWS Cleveland, OH issued this flash flood warning at Jul 29, 2021, 12:03 PM EDT for Ashtabula County, Ohio. It was in force for 3 hr. 3 reports 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: Jul 29, 2021, 12:03 PM EDT (16:03 UTC)
Expired: Jul 29, 2021, 3:30 PM EDT
In force: 3 hr
Issued by: NWS Cleveland, OH
Area: Storm-based polygon
Flood severity: None

County Ashtabula County, OH

The radar

The Cleveland radar (KCLE), 105 km from the middle of the area, began a volume at 16:05 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
Jul 29, 12:48 PM EDT	FLOOD	2 S Ashtabula, OH	5-6 INCHES OF WATER ON ROAD AND FLOODING AROUND NEIGHBORHOOD.
Jul 29, 12:48 PM EDT	FLASH FLOOD	2 Sse Ashtabula, OH	SEVERAL ROADS CLOSED DUE TO FLOWING HIGH WATER. VEHICLES STRANDED IN HIGH WATER AT WEST AVENUE AND WEST 34TH STREET, WEST 58TH STREET AND JEFFERSON ROAD. UNDERPASS ON MAIN AVENUE INUNDATED WITH 5 TO 6 FEET OF WATER, STRANDING A VEHICLE. SEVERAL REPORTS OF FLOO
Jul 29, 1:16 PM EDT	HEAVY RAIN 4.81	3 S Ashtabula, OH	RAINFALL IN 90 MINUTES.

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, 4.1 hours before the alert went out and 171 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: 136 J/kg
Mixed-layer CIN: -76 J/kg
Mixed-layer LCL: 1222 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 175 m²/s²
0-3 km storm-relative helicity: 213 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

004 
WGUS51 KCLE 291603
FFWCLE
OHC007-291930-
/O.NEW.KCLE.FF.W.0020.210729T1603Z-210729T1930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Cleveland OH
1203 PM EDT Thu Jul 29 2021

The National Weather Service in Cleveland has issued a

* Flash Flood Warning for...
  North Central Ashtabula County in northeastern Ohio...

* Until 330 PM EDT.

* At 1203 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 2 inches of rain 
  have fallen in the past 45 minutes. Additional rainfall amounts of 
  1 to 2 inches are possible in the warned area. Flash flooding is 
  ongoing or expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Ashtabula, North Kingsville, Edgewood and Plymouth Center.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 4190 8080 4192 8071 4184 8063 4181 8071
      4183 8080 4188 8086

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-2 INCHES IN 1 HOUR

$$

Greenawalt

2 follow-up statements

199 
WGUS71 KCLE 291814
FFSCLE

Flash Flood Statement
National Weather Service Cleveland OH
214 PM EDT Thu Jul 29 2021

OHC007-291930-
/O.CON.KCLE.FF.W.0020.000000T0000Z-210729T1930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Ashtabula OH-
214 PM EDT Thu Jul 29 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 330 PM EDT THIS 
AFTERNOON FOR NORTH CENTRAL ASHTABULA COUNTY...

At 214 PM EDT, local law enforcement reported flash flooding across 
the warned area. Several roads were closed in Ashtabula west of 
State Route 11 near and south of US 20. Between 2 and 4 inches of 
rain have fallen.

HAZARD...Flash flooding caused by heavy rain.

SOURCE...Law enforcement reported.

IMPACT...Flash flooding of small creeks and streams, urban areas,
         highways, streets and underpasses as well as other poor
         drainage and low-lying areas.

Some locations that will experience flash flooding include...
  Ashtabula, Plymouth Center and Edgewood.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 4190 8080 4191 8077 4183 8066 4181 8071
      4183 8080 4188 8086

FLASH FLOOD...OBSERVED

$$

Greenawalt

523 
WGUS71 KCLE 291928
FFSCLE

Flash Flood Statement
National Weather Service Cleveland OH
328 PM EDT Thu Jul 29 2021

OHC007-291938-
/O.EXP.KCLE.FF.W.0020.000000T0000Z-210729T1930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Ashtabula OH-
328 PM EDT Thu Jul 29 2021

...FLASH FLOOD WARNING AT 330 PM EDT THIS AFTERNOON FOR NORTH 
CENTRAL ASHTABULA COUNTY HAS BEEN REPLACED WITH A FLOOD WARNING...

The heavy rain has ended but several roads remain closed. For this 
reason, the Flash Flood Warning has been replaced by a Flood 
Warning. Please continue to heed remaining road closures.

LAT...LON 4190 8080 4191 8077 4183 8066 4181 8071
      4183 8080 4188 8086

$$

PS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 29, 8:57 AM EDT	Special Weather Statement	CLE	Marion	33 min
Jul 29, 9:11 AM EDT	Special Marine Warning	CLE		94 min
Jul 29, 9:46 AM EDT	Special Weather Statement	CLE	Ashtabula, Geauga, Lake	29 min
Jul 29, 10:03 AM EDT	Small Craft Advisory	CLE		28 hr
Jul 29, 10:05 AM EDT	Beach Hazards Statement	CLE	Ashtabula, Cuyahoga, Erie, Lake, Lorain	28 hr
Jul 29, 10:09 AM EDT	Special Marine Warning	CLE		2 hr
Jul 29, 10:47 AM EDT	Severe Thunderstorm Warning	CLE	Ashtabula, Lake	43 min
Jul 29, 11:16 AM EDT	Special Marine Warning	CLE		60 min
Jul 29, 11:35 AM EDT	Severe Thunderstorm Warning	CLE	Ashtabula, Lake	40 min
Jul 29, 11:45 AM EDT	Tornado Warning	CLE	Ashtabula	27 min
Jul 29, 11:50 AM EDT	Areal Flood Advisory	CLE	Ashtabula	3 hr
Jul 29, 12:31 PM EDT	Special Weather Statement	CLE	Ashtabula	29 min
Jul 29, 12:52 PM EDT	Areal Flood Advisory	CLE	Ashtabula	3 hr
Jul 29, 3:28 PM EDT	Areal Flood Warning	CLE	Ashtabula	2 hr
Jul 29, 3:46 PM EDT	Special Weather Statement	CLE	Stark	29 min
Jul 29, 4:15 PM EDT	Special Weather Statement	CLE	Stark	30 min

Nearby

Flash Flood Warnings in Ohio, 2021 Every flash flood warning in 2021

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.