Alert archive / Ohio / Tornado Warnings in 2009

Tornado Warning 9, NWS Cleveland, OH

August 20, 2009Lorain County, Ohio

NWS Cleveland, OH issued this tornado warning at Aug 20, 2009, 4:38 PM EDT for Lorain County, Ohio. It was in force for 18 min. 2 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: Aug 20, 2009, 4:38 PM EDT (20:38 UTC)
Expired: Aug 20, 2009, 4:56 PM EDT
In force: 18 min
Issued by: NWS Cleveland, OH
Area: Storm-based polygon

County Lorain County, OH

The radar

The Cleveland radar (KCLE), 25 km from the middle of the area, began a volume at 20:39 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
Aug 20, 4:45 PM EDT	TSTM WND DMG	Lorain, OH	A FEW TREES AND LARGE LIMBS DOWN.
Aug 20, 5:00 PM EDT	HAIL 0.75	Avon, OH

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Aug 20, 2:41 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 8.6 hours before the alert went out and 176 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: 126 J/kg
Mixed-layer CIN: -43 J/kg
Mixed-layer LCL: 624 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: -89 m²/s²
0-3 km storm-relative helicity: -138 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

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

000 
WFUS51 KCLE 202038
TORCLE
OHC093-202130-
/O.NEW.KCLE.TO.W.0009.090820T2038Z-090820T2130Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CLEVELAND OH
438 PM EDT THU AUG 20 2009

THE NATIONAL WEATHER SERVICE IN CLEVELAND HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN LORAIN COUNTY IN NORTH CENTRAL OHIO

* UNTIL 530 PM EDT

* AT 437 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED NEAR AMHERST...OR 6 MILES SOUTHWEST OF LORAIN...
  AND MOVING NORTHEAST AT 50 MPH.

* LOCATIONS IMPACTED INCLUDE...
  LORAIN...
  ELYRIA...
  SHEFFIELD...
  SHEFFIELD LAKE...
  NORTH RIDGEVILLE...
  AVON LAKE...
  AVON...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. IF NO
BASEMENT IS AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE
BUILDING IN AN INTERIOR HALLWAY OR CLOSET.

&&

PLEASE REPORT SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE. 1-877-633-6772. WHEN YOU CAN DO SO SAFELY.

LAT...LON 4152 8197 4137 8198 4135 8228 4144 8235
      4144 8232 4144 8228 4147 8221 4153 8199
TIME...MOT...LOC 2039Z 241DEG 41KT 4140 8225

$$

LEINS

1 follow-up statement

000 
WWUS51 KCLE 202056
SVSCLE

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CLEVELAND OH
456 PM EDT THU AUG 20 2009

OHC093-202107-
/O.CAN.KCLE.TO.W.0009.000000T0000Z-090820T2130Z/
LORAIN OH-
456 PM EDT THU AUG 20 2009

...THE TORNADO WARNING FOR NORTHERN LORAIN COUNTY IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT
THURSDAY EVENING FOR NORTHERN OHIO AND NORTHWEST PENNSYLVANIA.

LAT...LON 4152 8197 4137 8198 4135 8228 4144 8235
      4144 8232 4144 8228 4147 8221 4153 8199
TIME...MOT...LOC 2057Z 241DEG 41KT 4149 8200

$$

MITCHELL

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 19, 8:04 PM EDT	Severe Thunderstorm Warning	CLE	Erie, Huron, Lorain	35 min
Aug 19, 8:10 PM EDT	Special Marine Warning	CLE		85 min
Aug 19, 9:51 PM EDT	Flash Flood Warning	CLE	Marion, Morrow	4 hr
Aug 20, 9:16 AM EDT	Small Craft Advisory	CLE		36 hr
Aug 20, 2:31 PM EDT	Special Marine Warning	CLE		89 min
Aug 20, 2:54 PM EDT	Severe Thunderstorm Warning	CLE	Wyandot	26 min
Aug 20, 3:05 PM EDT	Severe Thunderstorm Warning	CLE	Crawford, Seneca	55 min
Aug 20, 3:18 PM EDT	Special Marine Warning	CLE		87 min
Aug 20, 3:35 PM EDT	Severe Thunderstorm Warning	CLE	Crawford	40 min
Aug 20, 3:40 PM EDT	Special Marine Warning	CLE		2 hr
Aug 20, 4:09 PM EDT	Severe Thunderstorm Warning	CLE	Marion, Morrow	51 min
Aug 20, 4:16 PM EDT	Severe Thunderstorm Warning	CLE	Huron, Richland	44 min
Aug 20, 4:21 PM EDT	Severe Thunderstorm Warning	CLE	Crawford	39 min
Aug 20, 4:33 PM EDT	Severe Thunderstorm Warning	CLE	Ashland, Richland	57 min
Aug 20, 4:35 PM EDT	Severe Thunderstorm Warning	CLE	Lorain	25 min
Aug 20, 4:46 PM EDT	Special Marine Warning	CLE		29 min
Aug 20, 4:46 PM EDT	Severe Thunderstorm Warning	CLE	Lorain	44 min
Aug 20, 5:06 PM EDT	Severe Thunderstorm Warning	CLE	Knox	54 min
Aug 20, 5:14 PM EDT	Severe Thunderstorm Warning	CLE	Medina	61 min
Aug 20, 5:38 PM EDT	Special Marine Warning	CLE		112 min
Aug 20, 5:42 PM EDT	Severe Thunderstorm Warning	CLE	Wayne	48 min
Aug 20, 5:47 PM EDT	Severe Thunderstorm Warning	CLE	Summit	43 min
Aug 20, 5:52 PM EDT	Severe Thunderstorm Warning	CLE	Cuyahoga	38 min
Aug 20, 6:00 PM EDT	Severe Thunderstorm Warning	CLE	Geauga, Lake, Portage	60 min
Aug 20, 6:29 PM EDT	Severe Thunderstorm Warning	CLE	Ashtabula, Trumbull	61 min
Aug 20, 6:43 PM EDT	Tornado Warning	CLE	Portage	30 min
Aug 20, 6:56 PM EDT	Tornado Warning	CLE	Stark	29 min
Aug 20, 7:23 PM EDT	Areal Flood Advisory	CLE	Ashtabula, Mahoning, Trumbull	3 hr
Aug 20, 7:26 PM EDT	Severe Thunderstorm Warning	CLE	Trumbull	49 min
Aug 20, 7:29 PM EDT	Special Marine Warning	CLE		91 min

Nearby

Tornado Warnings in Ohio, 2009 Every tornado warning in 2009 Tornadoes in 2009

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.