JUL.20.10 SPECIAL WEATHER SUMMARY

[Derecho]

4TH TORNADO CONFIRMED ON JUNE 6.10: F0 6KM SW OF HARROW.

F0 ALSO CONFIRMED ON JULY 20 40KM SW OF THE SOO.

9 tornadoes now in 2010 for Ontario.
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WEATHER SUMMARY FOR ALL OF SOUTHERN ONTARIO AND THE NATIONAL CAPITAL
REGION ISSUED BY ENVIRONMENT CANADA TORONTO AT 1:35 PM EDT MONDAY
26 JULY 2010.

FOURTH TORNADO CONFIRMED FROM JUNE 6, 2010 SEVERE THUNDERSTORM IN
HARROW AND LEAMINGTON AREA IN ESSEX COUNTY

TORNADO ON ST. JOSEPH ISLAND, SOUTHEAST OF SAULT STE. MARIE, ON
JULY 20
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==WEATHER EVENT DISCUSSION==

IN THE WAKE OF THE RECENT TORNADO FRIDAY EVENING IN AMHERSTBURG, TWO
MORE TORNADOES ARE BEING ADDED TO THE 2010 SEASON TOTAL IN ONTARIO.

THE SEVERE THUNDERSTORM THAT MOVED THROUGH PORTIONS OF ESSEX COUNTY
DURING THE EARLY MORNING HOURS OF SUNDAY, JUNE 6, WAS ORIGINALLY
THOUGHT TO HAVE PRODUCED ONE TORNADO. FURTHER STUDY EARLIER THIS
MONTH OF THE DAMAGE PATTERN IN THE AREA AND OF RADAR IMAGERY LED TO A
REASSESSMENT OF THE EVENT AS THREE SEPARATE TORNADOES: ONE TO THE
SOUTH OF HARROW WHICH WAS RATED AS A FUJITA SCALE ONE TORNADO WITH
PEAK WINDS BETWEEN 120 AND 170 KM/H, ONE SOUTHEAST OF HARROW WHICH
WAS RATED AS A FUJITA SCALE TWO TORNADO WITH PEAK WINDS BETWEEN 180
AND 240 KM/H AND ONE IN THE SOUTHERN SECTIONS OF LEAMINGTON THAT WAS
RATED AS FUJITA SCALE ONE TORNADO.

THE SEVERE THUNDERSTORM DURING THAT TIME ALSO CAUSED TREE DAMAGE AND
MINOR STRUCTURAL DAMAGE IN THE CRYSTAL LANE AREA NEAR LAKE ERIE,
APPROXIMATELY SIX KILOMETRES SOUTHWEST OF HARROW. A WIND FARM IN THIS
AREA HAD METEOROLOGICAL EQUIPMENT ON SITE. ENVIRONMENT CANADA WAS
RECENTLY PROVIDED WITH WIND AND PRESSURE INFORMATION FROM THIS WIND
FARM BY THE COMPANY, GL GARRAD HASSAN. BASED UPON THE INFORMATION
PROVIDED BY THIS EQUIPMENT, THE CRYSTAL LANE DAMAGE IS NOW BEING
CONFIRMED AS BEING CAUSED BY A TORNADO. THIS TORNADO HAS BEEN RATED
AS A FUJITA SCALE ZERO TORNADO WITH PEAK WINDS OF APPROXIMATELY 110
KM/H. THE DAMAGE PATH WAS APPROXIMATELY 800 METRES LONG AND 300
METRES WIDE AT ITS WIDEST POINT.

IN ADDITION, AT APPROXIMATELY 4:40 PM ON TUESDAY, JULY 20, A POWERFUL
THUNDERSTORM MOVED OVER ST. JOSEPH ISLAND, WHICH IS APPROXIMATELY 40
KM TO THE SOUTHEAST OF SAULT STE. MARIE. A DAMAGE SURVEY CONDUCTED BY
A STORM SPOTTER IN THE AREA INDICATED A PATH OF INTERMITTENT DAMAGE
TO TREES APPROXIMATELY FIVE KM LONG AND 50 METRES WIDE. BASED ON THE
DAMAGE, THIS TORNADO WAS RATED AS A FUJITA SCALE ZERO TORNADO.

WITH THE TORNADO IN THE AMHERSTBURG AREA ON FRIDAY JULY 23 ALONG WITH
THIS ADDITIONAL REASSESSMENT OF THE JUNE 6 SEVERE WEATHER EVENT AND
THE CONFIRMATION OF THE TORNADO ON ST. JOSEPH ISLAND, THE TOTAL
NUMBER OF TORNADOES IN ONTARIO THIS SEASON NOW STANDS AT NINE. THE
SUMMER SEVERE WEATHER SEASON IN ONTARIO RUNS FROM LATE APRIL UNTIL
EARLY OCTOBER, AND ON AVERAGE ONTARIO HAS 11 TORNADOES EACH YEAR.

END/OSPC

[DarkSky]

Hey guys/gals - when posting EC or NWS statements, could you please 'code' the text? Just highlight the text then click on the "Code" button. THanks!