Alert archive / Ohio / Flash Flood Warnings in 2018

Flash Flood Warning 15, NWS Cleveland, OH

October 2, 2018Ashtabula County, Ohio; Crawford County, Pennsylvania

NWS Cleveland, OH issued this flash flood warning at Oct 2, 2018, 3:35 PM EDT for Ashtabula County, Ohio; Crawford County, Pennsylvania. It was in force for 111 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Oct 2, 2018, 3:35 PM EDT (19:35 UTC)
Expired: Oct 2, 2018, 5:26 PM EDT
In force: 111 min
Issued by: NWS Cleveland, OH
Area: Storm-based polygon
Flood severity: None

Counties Ashtabula County, OH, Crawford County, PA

The radar

The Pittsburgh radar (KPBZ), 131 km from the middle of the area, began a volume at 19:34 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

Pittsburgh, PA (KAGC), launched 12:00Z, 7.6 hours before the alert went out and 144 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: 779 J/kg
Mixed-layer CIN: -35 J/kg
Mixed-layer LCL: 821 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 120 m²/s²
0-3 km storm-relative helicity: 133 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 2.7

Open this sounding in Storm Lab

The text

As transmitted.

756 
WGUS51 KCLE 021935
FFWCLE
OHC007-PAC039-030130-
/O.NEW.KCLE.FF.W.0015.181002T1935Z-181003T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Cleveland OH
335 PM EDT TUE OCT 2 2018

The National Weather Service in Cleveland has issued a

* Flash Flood Warning for...
  East central Ashtabula County in northeastern Ohio...
  Crawford County in northwestern Pennsylvania...

* Until 930 PM EDT.

* At 334 PM EDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Up to two inches of rain have
  already fallen. Flash flooding is expected to begin shortly.

* Some locations that will experience flooding include...
  Meadville, Titusville, Cambridge Springs, Linesville, Riceville,
  Harmonsburg, Lincolnville, Canadohta Lake, Guys Mills, Pymatuning
  North, Pymatuning Central, Pierpont, Saegertown, Conneautville,
  Hydetown, Springboro, Blooming Valley, Townville, Spartansburg and
  Venango.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.

A Flash Flood Warning means that flooding is imminent or occurring.
If you are in the warned area move to higher ground immediately.
Residents living along streams and creeks should take immediate
precautions to protect life and property.

&&

LAT...LON 4162 7982 4160 7985 4163 8078 4186 8075
      4185 8021 4185 7961 4162 7962

$$

Griffin

1 follow-up statement

713 
WGUS71 KCLE 022126
FFSCLE

Flash Flood Statement
National Weather Service Cleveland OH
526 PM EDT TUE OCT 2 2018

OHC007-PAC039-022136-
/O.CAN.KCLE.FF.W.0015.000000T0000Z-181003T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Ashtabula OH-Crawford PA-
526 PM EDT TUE OCT 2 2018

...THE FLASH FLOOD WARNING FOR EAST CENTRAL ASHTABULA AND CRAWFORD
COUNTIES IS CANCELLED...

The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed any remaining road closures.

LAT...LON 4162 7982 4160 7985 4163 8078 4186 8075
      4185 8021 4185 7961 4162 7962

$$

Sefcovic

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 2, 10:16 AM EDT	Small Craft Advisory	CLE		11 hr
Oct 2, 2:30 PM EDT	Tornado Warning	CLE	Ashtabula	45 min
Oct 2, 3:01 PM EDT	Tornado Warning	CLE	Ashtabula	44 min
Oct 2, 4:15 PM EDT	Severe Thunderstorm Warning	CLE	Holmes	45 min
Oct 2, 5:04 PM EDT	Severe Thunderstorm Warning	CLE	Holmes	12 min
Oct 2, 5:14 PM EDT	Severe Thunderstorm Warning	CLE	Trumbull	46 min
Oct 2, 2:17 PM EDT	Special Weather Statement	CLE	Crawford	43 min
Oct 2, 2:28 PM EDT	Tornado Warning	CLE	Crawford	32 min
Oct 2, 2:53 PM EDT	Tornado Warning Tornado observed	CLE	Crawford	52 min
Oct 2, 3:39 PM EDT	Tornado Warning Considerable damage threat	CLE	Crawford	15 min
Oct 2, 3:43 PM EDT	Tornado Warning	CLE	Crawford	47 min
Oct 2, 3:51 PM EDT	Tornado Warning Considerable damage threat	CLE	Crawford	39 min

Nearby

Flash Flood Warnings in Ohio, 2018 Flash Flood Warnings in Pennsylvania, 2018 Every flash flood warning in 2018

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.