Alert archive / Ohio / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 171, NWS Cleveland, OH

August 10, 2012Geauga County, Lake County, Ohio

NWS Cleveland, OH issued this severe thunderstorm warning at Aug 10, 2012, 3:40 PM EDT for Geauga County, Lake County, Ohio. It was in force for 50 min. 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
Aug 10, 2012, 3:40 PM EDT (19:40 UTC)
Expired
Aug 10, 2012, 4:30 PM EDT
In force
50 min
Issued by
NWS Cleveland, OH
Area
Storm-based polygon

Counties Geauga County, OH, Lake County, OH

The radar

The Cleveland radar (KCLE), 67 km from the middle of the area, began a volume at 19:40 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

TimeReportWhereRemark
Aug 10, 3:46 PM EDTHAIL 1Mentor, OH
Aug 10, 3:52 PM EDTHAIL 0.75Painesville, OH
Aug 10, 4:00 PM EDTHAIL 0.754 S Painesville, OH

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

The nearest sounding before it

Pittsburgh, PA (KAGC), launched 12:00Z, 7.7 hours before the alert went out and 173 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-pSkew-T log-p diagram, Pittsburgh, PA at 12:00Z on 2012-08-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 129 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Pittsburgh, PA at 12:00Z on 2012-08-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 102 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
129 J/kg
Mixed-layer CIN
-29 J/kg
Mixed-layer LCL
706 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
102 m²/s²
0-3 km storm-relative helicity
133 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

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

292 
WUUS51 KCLE 101940
SVRCLE
OHC055-085-102030-
/O.NEW.KCLE.SV.W.0171.120810T1940Z-120810T2030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CLEVELAND OH
340 PM EDT FRI AUG 10 2012

THE NATIONAL WEATHER SERVICE IN CLEVELAND HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN GEAUGA COUNTY IN NORTHEAST OHIO
  LAKE COUNTY IN NORTHEAST OHIO

* UNTIL 430 PM EDT

* AT 336 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  WILLOUGHBY...AND MOVING NORTHEAST AT 30 MPH.

* LOCATIONS IMPACTED INCLUDE...
  PAINESVILLE...
  PERRY...
  MADISON...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. SEEK SHELTER INSIDE NOW AND STAY AWAY FROM
WINDOWS.

&&

PLEASE REPORT HAIL AND STRONG WINDS TO THE NATIONAL WEATHER SERVICE
BY CALLING TOLL FREE...877-633-6772...WHEN YOU CAN DO SO SAFELY.

LAT...LON 4186 8100 4165 8100 4150 8133 4165 8147
      4177 8127 4177 8124 4182 8113
TIME...MOT...LOC 1941Z 235DEG 27KT 4163 8130

$$
2 follow-up statements
708 
WWUS51 KCLE 102008
SVSCLE

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CLEVELAND OH
408 PM EDT FRI AUG 10 2012

OHC055-085-102030-
/O.CON.KCLE.SV.W.0171.000000T0000Z-120810T2030Z/
GEAUGA OH-LAKE OH-
408 PM EDT FRI AUG 10 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM EDT
FOR LAKE AND NORTHERN GEAUGA COUNTIES...

AT 404 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED
NEAR PAINESVILLE...MOVING NORTHEAST AT 30 MPH.

AT 346 PM EDT...QUARTER SIZE HAIL HAD BEEN REPORTED NEAR MENTOR.

LOCATIONS NEAR THE PATH OF THE SEVERE THUNDERSTORM INCLUDE...NORTH
PERRY...MADISON AND NORTH MADISON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. SEEK SHELTER INSIDE NOW AND STAY AWAY FROM
WINDOWS.

&&

LAT...LON 4186 8100 4165 8100 4150 8133 4168 8142
      4177 8127 4177 8124 4182 8113
TIME...MOT...LOC 2007Z 235DEG 27KT 4172 8116

$$

YEAGER
793 
WWUS51 KCLE 102031
SVSCLE

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CLEVELAND OH
431 PM EDT FRI AUG 10 2012

OHC055-085-102041-
/O.EXP.KCLE.SV.W.0171.000000T0000Z-120810T2030Z/
GEAUGA OH-LAKE OH-
431 PM EDT FRI AUG 10 2012

...THE SEVERE THUNDERSTORM WARNING FOR LAKE AND NORTHERN GEAUGA
COUNTIES EXPIRED AT 430 PM EDT...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND MOVED OUT OF
THE WARNED AREA...HOWEVER HEAVY RAIN IS STILL POSSIBLE WITH THIS
THUNDERSTORM.

LAT...LON 4186 8100 4165 8100 4150 8133 4168 8142
      4177 8127 4177 8124 4182 8113
TIME...MOT...LOC 2008Z 235DEG 27KT 4172 8115

$$

YEAGER

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 9, 8:45 PM EDTSevere Thunderstorm WarningCLEKnox60 min
Aug 9, 9:00 PM EDTSpecial Marine WarningCLE2 hr
Aug 9, 10:39 PM EDTSevere Thunderstorm WarningCLEErie31 min
Aug 9, 10:56 PM EDTSpecial Marine WarningCLE2 hr
Aug 10, 1:02 AM EDTSevere Thunderstorm WarningCLESandusky, Seneca58 min
Aug 10, 2:06 AM EDTSpecial Marine WarningCLE114 min
Aug 10, 2:14 AM EDTSevere Thunderstorm WarningCLEErie, Lorain43 min
Aug 10, 4:39 PM EDTAreal Flood AdvisoryCLELake3 hr

Nearby

Severe Thunderstorm Warnings in Ohio, 2012Every severe thunderstorm warning in 2012

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.