WWCN11 CWTO 191419
SEVERE WEATHER BULLETIN
ISSUED BY ENVIRONMENT CANADA
AT 10:19 AM EDT FRIDAY 19 AUGUST 2005.
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WATCHES/WARNINGS IN EFFECT FOR SOUTHERN ONTARIO...

SEVERE THUNDERSTORM WATCH FOR:
=NEW= ELGIN
=NEW= LONDON - MIDDLESEX
=NEW= SIMCOE - DELHI - NORFOLK
=NEW= DUNNVILLE - CALEDONIA - HALDIMAND
=NEW= OXFORD - BRANT
=NEW= NIAGARA
=NEW= CITY OF HAMILTON
=NEW= STRATFORD - MITCHELL - SOUTHERN PERTH COUNTY
=NEW= LISTOWEL - MILVERTON - NORTHERN PERTH COUNTY
=NEW= WATERLOO - WELLINGTON
=NEW= HANOVER - DUNDALK - SOUTHERN GREY COUNTY
      GODERICH - BLUEWATER - SOUTHERN HURON COUNTY
      WINGHAM - BLYTH - NORTHERN HURON COUNTY
      SAUGEEN SHORES - KINCARDINE - SOUTHERN BRUCE COUNTY.

      ..POTENTIAL FOR SEVERE THUNDERSTORMS TO DEVELOP THIS
      AFTERNOON..

      THIS IS AN ALERT TO THE POTENTIAL DEVELOPMENT OF SEVERE
      THUNDERSTORMS WITH LARGE HAIL AND DAMAGING WINDS.

      MONITOR WEATHER CONDITIONS..LISTEN FOR UPDATED STATEMENTS.
      IF THREATENING WEATHER APPROACHES TAKE IMMEDIATE SAFETY
      PRECAUTIONS.

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==DISCUSSION==
A FRONTAL SYSTEM CROSSING THE ABOVE REGIONS WILL COLLIDE WITH AN INCREASINGLY MOIST
AND UNSTABLE AIRMASS TO PRODUCE FAVOURABLE CONDITIONS FOR SEVERE THUNDERSTORMS THIS
AFTERNOON INTO EARLY THIS EVENING.  THE MAIN THREAT FROM THESE STORMS WILL BE DAMAGING
WIND GUSTS IN EXCESS OF 90 KM/H..LARGE HAIL IN EXCESS OF 2 CENTIMETRES AND LOCALLY
HEAVY RAINFALL IN EXCESS OF 50 MILLIMETRES IN ONE HOUR.
THERE IS ALSO A SLIGHT RISK THESE STORMS WILL BE CAPABLE OF PRODUCING A TORNADO.

PLEASE REFER TO THE LATEST PUBLIC FORECASTS FOR FURTHER DETAILS.

END/TUGWOOD