Alert archive / Ohio / Flash Flood Warnings in 2022

Flash Flood Warning 21, NWS Cleveland, OH

September 4, 2022Mahoning County, Ohio

NWS Cleveland, OH issued this flash flood warning at Sep 4, 2022, 6:48 PM EDT for Mahoning County, Ohio. It was in force for 5 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: Sep 4, 2022, 6:48 PM EDT (22:48 UTC)
Expired: Sep 5, 2022, 12:00 AM EDT
In force: 5 hr
Issued by: NWS Cleveland, OH
Area: Storm-based polygon
Damage threat: Considerable
Flood severity: None

County Mahoning County, OH

The radar

The Pittsburgh radar (KPBZ), 67 km from the middle of the area, began a volume at 22:49 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
Sep 4, 7:30 PM EDT	FLOOD	Boardman, OH	NUMEROUS BASEMENTS FLOODED AND ROADS CLOSED IN BOARDMAN.

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, 10.8 hours before the alert went out and 84 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: 220 J/kg
Mixed-layer CIN: -44 J/kg
Mixed-layer LCL: 727 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 40 m²/s²
0-3 km storm-relative helicity: 49 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

826 
WGUS51 KCLE 042248
FFWCLE
OHC099-050400-
/O.NEW.KCLE.FF.W.0021.220904T2248Z-220905T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Cleveland OH
648 PM EDT Sun Sep 4 2022

The National Weather Service in Cleveland has issued a

* Flash Flood Warning for...
  Eastern Mahoning County in northeastern Ohio...

* Until midnight EDT.

* At 648 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 2 and 3 inches of rain 
  have fallen. Additional rainfall amounts of 0.5 to 1.5 inches are 
  possible in the warned area. Flash flooding is ongoing or expected 
  to begin shortly.

  HAZARD...Life threatening flash flooding. Thunderstorms
           producing flash flooding.

  SOURCE...Radar.

  IMPACT...Life threatening flash flooding of creeks and streams,
           urban areas, highways, streets and underpasses.

* Some locations that will experience flash flooding include...
  Youngstown, Boardman, Campbell, Canfield, Struthers, Poland, 
  Lowellville and Greenford.

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 4105 8052 4093 8080 4100 8081 4101 8079
      4111 8063 4112 8052 4110 8052 4106 8052

FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

1 follow-up statement

564 
WGUS71 KCLE 050355
FFSCLE

Flash Flood Statement
National Weather Service Cleveland OH
1155 PM EDT Sun Sep 4 2022

OHC099-050405-
/O.EXP.KCLE.FF.W.0021.000000T0000Z-220905T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mahoning OH-
1155 PM EDT Sun Sep 4 2022

...FLASH FLOOD WARNING WILL EXPIRE AT MIDNIGHT EDT TONIGHT FOR 
EASTERN MAHONING COUNTY...

The heavy rain has ended and flood waters are receding. Please 
continue to heed remaining road closures as flooding continues to 
recede.

LAT...LON 4105 8052 4093 8080 4100 8081 4101 8079
      4111 8063 4112 8052 4110 8052 4106 8052

$$

Maines

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 4, 4:25 PM EDT	Special Weather Statement	CLE	Summit	35 min
Sep 4, 4:29 PM EDT	Special Weather Statement	CLE	Mahoning	61 min
Sep 4, 4:33 PM EDT	Special Weather Statement	CLE	Portage	42 min
Sep 4, 4:51 PM EDT	Areal Flood Advisory	CLE	Cuyahoga, Medina, Summit	3 hr
Sep 4, 5:00 PM EDT	Areal Flood Advisory	CLE	Mahoning	3 hr
Sep 4, 5:30 PM EDT	Special Weather Statement	CLE	Mahoning	45 min
Sep 4, 5:55 PM EDT	Flash Flood Warning	CLE	Mahoning	5 hr
Sep 4, 6:02 PM EDT	Tornado Warning	CLE	Mahoning	26 min
Sep 4, 6:37 PM EDT	Areal Flood Advisory	CLE	Portage, Trumbull	3 hr
Sep 4, 6:47 PM EDT	Areal Flood Advisory	CLE	Portage, Summit	65 min
Sep 4, 6:53 PM EDT	Areal Flood Advisory	CLE	Medina	48 min
Sep 4, 7:20 PM EDT	Areal Flood Advisory	CLE	Trumbull	3 hr

Nearby

Flash Flood Warnings in Ohio, 2022 Every flash flood warning in 2022

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.