Alert archive / Ohio / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 101, NWS Cleveland, OH

August 11, 2009Stark County, Summit County, Ohio

NWS Cleveland, OH issued this severe thunderstorm warning at Aug 11, 2009, 5:42 PM EDT for Stark County, Summit County, Ohio. It was in force for 63 min. 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: Aug 11, 2009, 5:42 PM EDT (21:42 UTC)
Expired: Aug 11, 2009, 6:45 PM EDT
In force: 63 min
Issued by: NWS Cleveland, OH
Area: Storm-based polygon

Counties Stark County, OH, Summit County, OH

The radar

The Cleveland radar (KCLE), 69 km from the middle of the area, began a volume at 21:45 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 11, 5:58 PM EDT	HAIL 0.75	Uniontown, OH

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

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 9.7 hours before the alert went out and 121 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: 416 J/kg
Mixed-layer CIN: -33 J/kg
Mixed-layer LCL: 632 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 53 m²/s²
0-3 km storm-relative helicity: 100 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KCLE 112142
SVRCLE
OHC151-153-112245-
/O.NEW.KCLE.SV.W.0101.090811T2142Z-090811T2245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CLEVELAND OH
542 PM EDT TUE AUG 11 2009

THE NATIONAL WEATHER SERVICE IN CLEVELAND HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN STARK COUNTY IN NORTHEAST OHIO
  SOUTHEASTERN SUMMIT COUNTY IN NORTHEAST OHIO

* UNTIL 645 PM EDT

* AT 542 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH. THIS STORM WAS LOCATED NEAR PORTAGE LAKES...OR 8 MILES
  SOUTH OF AKRON...AND WAS MOVING SOUTHEAST AT 20 MPH. PENNY SIZE
  HAIL CAN BE EXPECTED.

* LOCATIONS IMPACTED INCLUDE...
  NORTH CANTON...
  HARTVILLE...
  CANTON...
  ALLIANCE...

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 4099 8139 4099 8108 4073 8108 4072 8122
      4089 8164 4098 8162 4105 8155
TIME...MOT...LOC 2142Z 297DEG 20KT 4096 8151

$$

LEINS

3 follow-up statements

000 
WWUS51 KCLE 112159
SVSCLE

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CLEVELAND OH
559 PM EDT TUE AUG 11 2009

OHC151-153-112245-
/O.CON.KCLE.SV.W.0101.000000T0000Z-090811T2245Z/
STARK OH-SUMMIT OH-
559 PM EDT TUE AUG 11 2009

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM EDT
FOR SOUTHEASTERN SUMMIT AND NORTHEASTERN STARK COUNTIES...

AT 558 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH. THIS STORM WAS LOCATED 7 MILES NORTH OF 
CANTON...MOVING SOUTHEAST AT 25 MPH. PENNY SIZE HAIL MAY ALSO 
ACCOMPANY THESE STORMS.

LOCATIONS NEAR THE PATH OF THE SEVERE THUNDERSTORM INCLUDE...MEYERS
LAKE...CANTON...LOUISVILLE...LOUISVILLE...EAST CANTON...ALLIANCE AND
MINERVA.

LAT...LON 4099 8139 4099 8108 4073 8108 4072 8122
      4089 8164 4098 8162 4105 8155
TIME...MOT...LOC 2159Z 297DEG 20KT 4092 8140

$$

WILLARD

000 
WWUS51 KCLE 112218
SVSCLE

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CLEVELAND OH
618 PM EDT TUE AUG 11 2009

OHC153-112228-
/O.CAN.KCLE.SV.W.0101.000000T0000Z-090811T2245Z/
SUMMIT OH-
618 PM EDT TUE AUG 11 2009

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN SUMMIT COUNTY IS
CANCELLED...

THE STORM THAT PROMPTED THE WARNING HAS LEFT THE COUNTY.

LAT...LON 4074 8126 4084 8152 4093 8131 4099 8109
      4098 8108 4073 8108 4072 8120 4072 8123
TIME...MOT...LOC 2218Z 300DEG 23KT 4083 8124

$$

OHC151-112245-
/O.CON.KCLE.SV.W.0101.000000T0000Z-090811T2245Z/
STARK OH-
618 PM EDT TUE AUG 11 2009

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM EDT
FOR NORTHEASTERN STARK COUNTY...

AT 616 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH. THIS STORM WAS LOCATED 7 MILES EAST OF 
CANTON...MOVING SOUTHEAST AT 25 MPH. PENNY SIZE HAIL MAY ALSO 
ACCOMPANY THESE STORMS.

LOCATIONS NEAR THE PATH OF THE SEVERE THUNDERSTORM INCLUDE...ALLIANCE
AND MINERVA.

LAT...LON 4074 8126 4084 8152 4093 8131 4099 8109
      4098 8108 4073 8108 4072 8120 4072 8123
TIME...MOT...LOC 2218Z 300DEG 23KT 4083 8124

$$

WILLARD

000 
WWUS51 KCLE 112246
SVSCLE

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CLEVELAND OH
646 PM EDT TUE AUG 11 2009

OHC151-112256-
/O.EXP.KCLE.SV.W.0101.000000T0000Z-090811T2245Z/
STARK OH-
646 PM EDT TUE AUG 11 2009

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN STARK COUNTY
EXPIRED AT 645 PM EDT...

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

LAT...LON 4074 8126 4084 8152 4093 8131 4099 8109
      4098 8108 4073 8108 4072 8120 4072 8123
TIME...MOT...LOC 2218Z 300DEG 23KT 4083 8124

$$

WILLARD

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Cleveland, OH wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 11, 3:17 PM EDT, 2 hours 25 minutes earlier.

Area forecast discussion, Aug 11, 3:17 PM EDT, 2 hours 25 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CLEVELAND OH
317 PM EDT TUE AUG 11 2009

.SYNOPSIS...
COLD FRONT ACROSS LAKE ERIE...WILL PUSH SOUTH TO THE OHIO RIVER
TONIGHT.  HIGH PRESSURE WILL MOVE OVER THE AREA WEDNESDAY.

&&

.NEAR TERM /UNTIL 6 AM WEDNESDAY MORNING/...
LEADING EDGE OF THE COLD FRONT JUST SOUTH OF TOLEDO FOCUS OF
CONVECTIVE ACTIVITY THIS EVENING.   CAPES ACROSS THE AREA BETWEEN
1000 AND 1500 J/KG WITH LIS OF  -3 TO -5.  SECONDARY AREA OF TSRA
DEVELOPMENT NEAR THE 850MB FRONT NOW ACROSS SOUTHEAST LOWER
MICHIGAN.

TSRA MOVING ONTO LAKE ERIE HAVING A HARD TIME HOLDING TOGETHER. SO
FORECAST QUESTION IS HOW FAR EAST TO TAKE THE POPS THIS EVENING.
FOR MY FORECAST WENT LIKELY POPS THIS EVENING WEST OF A CLE TO CAK
LINE. TSRA SHOULD BEGIN WEAKING AFTER SUNSET...AND BE SOUTH OF THE
AREA BY MIDNIGHT.

EXPECT FRONT TO BE SOUTH OF THE AREA LATE THIS EVENING TAKING ALL
THE TSRA WITH IT.  MODELS HAVE THE FRONT NEAR THE OHIO RIVER BY
DAYBREAK...BUT THAT MIGHT BE A TAD FAST CONSIDERING THE PREVIOUS
MODEL RUNS PAST 2 DAYS HAVE BEEN TOO FAST WITH THE FRONT.

&&

.SHORT TERM /6 AM WEDNESDAY MORNING THROUGH FRIDAY NIGHT/...
MODELS IN GOOD AGREEMENT MOVING LARGE AREA OF HIGH PRESSURE OVER THE
LOWER GREAT LAKES/OHIO VALLEY ON WEDNESDAY.  THIS WILL PRODUCE DRY
AND MORE SEASONABLE CONDITIONS THROUGH THE END OF THE WORK WEEK.
HIGH SHIFTS EAST ON FRIDAY ALLOWING FOR A GRADUAL WARM UP.

&&

.LONG TERM.../SATURDAY THROUGH TUESDAY/
HIGH PRESSURE WILL SLIDE EAST TO THE ATLANTIC COAST ALLOWING A WEAK
AREA OF LOW PRESSURE TO MOVE ALONG ITS WESTERN PERIPHERY. STILL SOME
UNCERTAINTY AS TO HOW FAR NORTHWEST THE BETTER CHANCES WILL MOVE.
FOR NOW WILL ONLY GO WITH SLIGHT CHANCES. STILL LOOKS LIKE ABOVE
AVERAGE TEMPERATURES INTO EARLY NEXT WEEK.

&&

.AVIATION /19Z TUESDAY THROUGH SUNDAY/...
CONVECTION CONTINUES TO DEVELOP ALONG SEVERAL BOUNDARIES ACROSS
THE REGION. MOST CONCERN WILL BE WITH THE THUNDERSTORMS LOCATED
OVER NW OHIO AHEAD OF A COLD FRONT THAT IS SLOWLY MOVING
SOUTHWARD. WINDS WILL VARY IN THE CONVECTION BUT WILL GRADUALLY
BECOME NORTH IN THE WAKE OF THE FRONT/CONVECTION. WILL THEN HAVE
TO WATCH FOR FOG...ESPECIALLY WHERE RAIN OCCURS. WILL SEE SOME
IFR/MVFR CONDITIONS WITH THE FOG IN THE MORNING.

.OUTLOOK...MAINLY VFR...EXCEPT SOME LOCAL MVFR BR IN THE AM.

&&

.MARINE...
COLD FRONT/WEAK TROUGHS WILL CLEAR THE LAKE BY THIS EVENING TAKING
WITH THEM THE SCATTERED SHOWERS AND THUNDERSTORMS. LIGHT NORTHERLY
FLOW WILL CONTINUE FOR SEVERAL DAYS AS HIGH PRESSURE SLOWLY MOVES
ACROSS THE GREAT LAKES. WINDS WILL COME AROUND TO THE SOUTHEAST AND
TO THE SOUTHWEST OVER THE WEEKEND. NO SIGNIFICANT WEATHER FOR
MARINERS THE REST OF THE WEEK. FLOW LOOKS TO REMAIN LIGHT ENOUGH
THAT SMALL CRAFT ADVISORIES WILL LIKELY NOT BE NEEDED.

&&

.CLE WATCHES/WARNINGS/ADVISORIES...
OH...NONE.
PA...NONE.
MARINE...NONE.

&&

SYNOPSIS...DJB
NEAR TERM...DJB
SHORT TERM...DJB
LONG TERM...MULLEN
AVIATION...MULLEN
MARINE...OUDEMAN

Hazardous weather outlook, Aug 11, 4:11 AM EDT, 13 hours 31 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CLEVELAND OH
411 AM EDT TUE AUG 11 2009

LEZ061-142>149-162>169-OHZ003-006>014-017>023-027>033-036>038-047-
089-PAZ001>003-120815-
LAKE ERIE OPEN WATERS FROM RIPLEY TO BUFFALO NY-
MAUMEE BAY TO RENO BEACH OH-RENO BEACH TO THE ISLANDS OH-
THE ISLANDS TO VERMILION OH-VERMILION TO AVON POINT OH-
AVON POINT TO WILLOWICK OH-WILLOWICK TO GENEVA-ON-THE LAKE OH-GENEVA-
ON-THE-LAKE TO CONNEAUT OH-CONNEAUT OH TO RIPLEY NY-
LAKE ERIE OPEN WATERS FROM MAUMEE BAY TO RENO BEACH-
LAKE ERIE OPEN WATERS FROM RENO BEACH TO THE ISLANDS-
LAKE ERIE OPEN WATERS FROM THE ISLANDS TO VERMILION-
LAKE ERIE OPEN WATERS FROM VERMILION TO AVON POINT-
LAKE ERIE OPEN WATERS FROM AVON POINT TO WILLOWICK-
LAKE ERIE OPEN WATERS FROM WILLOWICK TO GENEVA-ON-THE-LAKE-
LAKE ERIE OPEN WATERS FROM GENEVA-ON-THE-LAKE TO CONNEAUT-
LAKE ERIE OPEN WATERS FROM CONNEAUT OH TO RIPLEY NY-LUCAS-WOOD-
OTTAWA-SANDUSKY-ERIE OH-LORAIN-CUYAHOGA-LAKE-GEAUGA-ASHTABULA INLAND-
HANCOCK-SENECA-HURON-MEDINA-SUMMIT-PORTAGE-TRUMBULL-WYANDOT-CRAWFORD-
RICHLAND-ASHLAND-WAYNE-STARK-MAHONING-MARION-MORROW-HOLMES-KNOX-
ASHTABULA LAKESHORE-NORTHERN ERIE-SOUTHERN ERIE-CRAWFORD PA-
411 AM EDT TUE AUG 11 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR LAKE ERIE...NORTH CENTRAL
OHIO...NORTHEAST OHIO...NORTHWEST OHIO AND NORTHWEST PENNSYLVANIA.

.DAY ONE...TODAY AND TONIGHT.

A COLD FRONT WILL MOVE EAST ACROSS THE REGION AND CAUSE
THUNDERSTORMS TO DEVELOP. THERE IS THE POSSIBILITY THAT SOME OF THE
THUNDERSTORMS THAT DEVELOP THIS AFTERNOON WILL BE SEVERE.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED.

LOMBARDY

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 10, 10:02 PM EDT	Areal Flood Warning	CLE	Ashland, Wayne	6 hr
Aug 11, 6:15 AM EDT	Special Marine Warning	CLE		60 min
Aug 11, 2:09 PM EDT	Severe Thunderstorm Warning	CLE	Erie	51 min
Aug 11, 3:27 PM EDT	Areal Flood Advisory	CLE	Mahoning	3 hr
Aug 11, 6:14 PM EDT	Severe Thunderstorm Warning	CLE	Marion, Wyandot	61 min
Aug 11, 7:05 PM EDT	Severe Thunderstorm Warning	CLE	Stark	22 min

Nearby

Severe Thunderstorm Warnings in Ohio, 2009 Every severe thunderstorm warning 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.