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June 2, 2009
Amanda Tornado and Severe Hail

Meteorological Case Study on the June 2, 2009 Event

A widespread hail producing severe weather event unfolded on Tuesday, June 2nd across east-central Indiana and much of southern Ohio, when a frontal boundary stalled out along and just south of the Interstate 70 corridor. With a moist, unstable air mass and moderate instability, thunderstorms developed rapidly along and south of the boundary. After the initial development, additional severe thunderstorms developed along numerous outflow boundaries. A few of the thunderstorms developed rotational characteristics as they interacted with the boundaries.

Two of the more notable storms from the event dropped large hail over long swaths. The first storm developed in east-central Indiana, moving into Wayne county, and held together for approximately 120 miles before weakening in Fayette county in Ohio. Along its path, numerous reports of golf ball size hail were reported with reports of as large as hen egg (2" diameter). The second storm developed near Dayton and produced hail along its 90 mile path before weakening in northern Hocking county. This storm first produced wind damage in Madison county, and continued on to do damage in Pickaway, Fairfield, and Hocking counties. This storm spawned an EF0 tornado in southwestern Fairfield county. For more information on this event, see the graphics and Public Information Statements (PNSs) below.

Fairfield-Pickaway Storm
Center of Storm Path EF0 Tornado SSE of Amanda
Darbyville Microburst Stoutsville Microburst

Click each image for the full size version

-------------------------------

PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE WILMINGTON OH
502 PM EDT THU JUN 4 2009

...EF0 TORNADO CONFIRMED SOUTH-SOUTHEAST OF AMANDA OHIO...

LOCATION...3 MILES SOUTH-SOUTHEAST OF AMANDA IN FAIRFIELD COUNTY OHIO
DATE...JUNE 2ND 2009
ESTIMATED TIME...536 PM EDT
MAXIMUM EF-SCALE RATING...EF0
ESTIMATED MAXIMUM WIND SPEED...65 MPH
MAXIMUM PATH WIDTH...10 YARDS
PATH LENGTH...50 YARDS
BEGINNING LAT/LON...39.5981 N / 82.7095 W
ENDING LAT/LON...39.5978 N / 82.7094 W

THE NATIONAL WEATHER SERVICE CONDUCTED A SURVEY AND HAS CONFIRMED A
BRIEF TORNADO TOUCHDOWN 3 MILES SOUTH-SOUTHEAST OF AMANDA IN
FAIRFIELD COUNTY OHIO.

A CONVERGENT PATH EXTENDING ABOUT 50 YARDS WAS FOUND IN A WHEAT
FIELD JUST NORTH OF JULIAN ROAD. THE WHEAT WAS LAID OUT IN A PATH
EXTENDING FROM NORTHWEST TO SOUTHEAST.

NO STRUCTURAL DAMAGE WAS REPORTED WITH THIS TORNADO.

$$

...MICROBURST CONFIRMED ONE MILE EAST OF STOUTSVILLE OHIO...

LOCATION...1 MILE EAST OF STOUTSVILLE IN FAIRFIELD COUNTY OHIO
DATE...JUNE 2ND 2009
ESTIMATED TIME...530 PM EDT
ESTIMATED MAXIMUM WIND SPEED...65 TO 70 MPH
MAXIMUM PATH WIDTH...450 YARDS
PATH LENGTH...0.25 MILES
BEGINNING LAT/LON...39.6016 N / 82.8114 W
ENDING LAT/LON...39.6004 N / 82.8069 W

THE NATIONAL WEATHER SERVICE HAS CONFIRMED A MICROBURST 1 MILE EAST
OF STOUTSVILLE IN FAIRFIELD COUNTY.

THE NATIONAL WEATHER SERVICE CONDUCTED A DAMAGE SURVEY NEAR A
PROPERTY ALONG OAKLAND STOUTSVILLE ROAD JUST EAST OF DOZER ROAD.
THE ONLY DAMAGE ON THE PROPERTY WAS TO A SMALL METAL SHED ALONG A
FENCE LINE. THE SHED WAS RIPPED OFF ITS WOODEN FOUNDATION AND
THROWN OVER TOP OF THE ADJACENT FENCE. DAMAGE WAS MORE EXTENSIVE TO
AN ADJACENT WHEAT FIELD DIRECTLY BEHIND THE PROPERTY. SEVERAL AREAS
WITHIN THE WHEAT FIELD WERE BLOWN DOWN IN A NORTHWEST TO SOUTHEAST
DIRECTION...FANNING OUT FROM THE ORIGIN. THIS DAMAGE SWATH IS
CONSISTENT WITH A LOCALIZED MICROBURST...EXTENDING OVER ABOUT A
QUARTER MILE WIDTH AND LENGTH THROUGH THE WHEAT FIELD.

A MICROBURST IS CLASSIFIED AS AN OUTRUSH OF DAMAGING WINDS FROM THE
DOWNDRAFT PORTION OF A THUNDERSTORM. DAMAGE OFTEN FANS OUT FROM THE
POINT OF ORIGIN...OFTEN IN A STARBURST PATTERN. WIND SPEEDS WITHIN
A MICROBURST CAN BE COMPARABLE TO A WEAK TORNADO.

$$


$$

RYAN
-------------------------------

PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE WILMINGTON OH
1151 AM EDT FRI JUN 5 2009

...MICROBURST CONFIRMED THREE MILES NORTHWEST OF DARBYVILLE OHIO...

LOCATION...3 MILES NORTHWEST OF DARBYVILLE IN PICKAWAY COUNTY OHIO
DATE...JUNE 2ND 2009
ESTIMATED TIME...455 PM EDT
ESTIMATED MAXIMUM WIND SPEED...75 TO 80 MPH
MAXIMUM PATH WIDTH...350 YARDS
PATH LENGTH...0.4 MILES
BEGINNING LAT/LON...39.7265 N / 83.1502 W
ENDING LAT/LON...39.7249 N / 83.1437 W

THE NATIONAL WEATHER SERVICE HAS CONFIRMED A MICROBURST 3 MILES
NORTHWEST OF DARBYVILLE IN PICKAWAY COUNTY.

THE NATIONAL WEATHER SERVICE...IN COLLABORATION WITH THE PICKAWAY
COUNTY EMA OFFICE AND LOCAL MEDIA CONDUCTED GROUND AND AERIAL
SURVEYS ALONG LONDON ROAD NEAR THE INTERSECTION WITH DARBY CREEK
ROAD. SIGNIFICANT DAMAGE TO THREE BARNS AND A HOME OCCURRED AT A
PROPERTY LOCATED ON THE NORTHWEST CORNER OF THE INTERSECTION OF
LONDON AND DARBY CREEK ROADS. THE HOME SUSTAINED ROOF AND GUTTER
DAMAGE. SEVERE SIDING DAMAGE ALSO WAS NOTED...LIKELY CAUSED BY TWO
INCH DIAMETER HAIL. A TRAILER WAS MOVED A SHORT DISTANCE TO THE
SOUTHEAST ON THE PROPERTY AS WELL. DEBRIS WAS CARRIED INTO AN
ADJACENT FIELD ON THE OTHER SIDE OF DARBY CREEK ROAD. ADDITIONAL
ROOF AND SIDING DAMAGE TO TWO HOMES OCCURRED TO THE NORTHEAST OF
THIS PROPERTY ALONG DARBY CREEK ROAD DUE TO THE STRONG WINDS AND
LARGE HAIL. DEBRIS FROM THE TWO HOMES WAS CARRIED SEVERAL HUNDRED
FEET TO THE SOUTHEAST ON THE OTHER SIDE OF DARBY CREEK ROAD.
NUMEROUS TREES WERE SNAPPED IN THE VICINITY OF THESE DAMAGED
STRUCTURES ALONG LONDON ROAD. THIS DAMAGE SWATH IS CONSISTENT WITH A
LOCALIZED MICROBURST...EXTENDING AROUND 0.4 MILES LENGTH AND ABOUT
350 YARDS IN WIDTH.

A MICROBURST IS CLASSIFIED AS AN OUTRUSH OF DAMAGING WINDS FROM THE
DOWNDRAFT PORTION OF A THUNDERSTORM. DAMAGE OFTEN FANS OUT FROM THE
POINT OF ORIGIN...OFTEN IN A STARBURST PATTERN. WIND SPEEDS WITHIN
A MICROBURST CAN BE COMPARABLE TO A WEAK TORNADO.

$$

ADDITIONAL INFORMATION MAY BE PROVIDED AT A LATER TIME...IF MORE
INFORMATION BECOMES AVAILABLE.

CITIZENS ARE ENCOURAGED TO CONTACT LOCAL AUTHORITIES WITH
INFORMATION ON ANY ADDITIONAL DAMAGE...FOR RELAY TO THE NATIONAL
WEATHER SERVICE.

$$

RYAN


Storm Reports:

NOTE: Marker locations are approximate and are not accurate to street level
LOCAL STORM REPORTS:
Tornado Hail Thunderstorm Wind Gust Thunderstorm Wind Damage
Flood Flash Flood Non-Thunderstorm Wind Gust Non-Thunderstorm Wind Damage
Other Report  

REPORTS WITH PHOTOS:
Tornado Hail Thunderstorm Wind Gust Thunderstorm Wind Damage
Flood Flash Flood Non-Thunderstorm Wind Gust Non-Thunderstorm Wind Damage
Other Report  

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Page last modified: May 29, 2010.
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