For definitions of our severe weather products, look below the day 1 outlook.
2007 Ontario Tornado Confirmations
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Tornado Probability Hail Probability Wind Probability
ONTARIO SEVERE WEATHER FORECASTING
SAT JULY 12 2008 AT 1100 AM EST
RISK IS FOR SAT JULY 12 2008
...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FOR NORTHEASTERN ONTARIO...
...THERE IS A RISK OF THUNDERSTORMS FOR ALL OF ONTARIO EAST OF LAKE NIPIGON AND MARATHON...
A POWERFUL SHORTWAVE IS LOCATED OVER NORTH CENTRAL ONTARIO TODAY CONTINUING TO PUSH EAST-NORTHEAST PRODUCING ANOTHER ROUND OF POWERFUL THUNDERSTORMS TODAY OVER NORTHEASTERN ONTARIO. A SLIGHT RISK OF SEVERE THUNDERSTORMS HAVE BEEN ISSUED FOR AREAS OF GERALDTON...FORT HOPE...ATTAWAPISKAT...CHAPLEAU...TIMMINS AND MOOSONEE...WITH 15% HAIL AND WIND PROBABILITIES AND A 5% TORNADO PROBABILITY FOR AREAS THAT HUG JAMES BAY.
THE LIGHTNING DETECTION NETWORK INDICATES THUNDERSTORMS ARE ONGOING NEAR TIMMINS WHICH MAY BE HELPING TO BREAK THE CAP IN PLACE...ESPECIALLY AS TEMPERATURES BEGIN TO CLIMB INTO THE MID TWENTIES TODAY. THE MAIN THREATS ACROSS THE REGION APPEAR TO BE DAMAGING WINDS LOCALLY AS HIGH 110 KMH...NICKEL TO PENNY SIZED HAIL...FLASH FLOODING AND POSSIBLY TORNADOES AROUND ATTAWAPISKAT...KAPUSKASING AND TIMMINS. DUE TO THE SPARSE POPULATION IN THESE REGIONS AND LACK OF DOPPLER RADAR...WARNINGS MAY BE SLOW TO OCCUR WHEN SEVERE WEATHER IS IMMINENT.
...ELSEWHERE AROUND SUDBURY AND SOUTHERN ONTARIO...
THUNDERSTORMS ARE ONGOING THIS MORNING OVER MICHIGAN PUSHING EAST AND NORTHEASTWARD BRINGING THE RISK OF FLASH FLOODING...SMALL HAIL UP TO NICKEL SIZE...AND BRIEF DAMAGING WIND GUSTS 60 TO 90 KMH AS A FRONT MOVES THROUGH.
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