Kamloops, British Columbia

Severe Weather Bulletin
issued by Environment Canada at
9.37 am PDT Tuesday 21 may 2013.
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Watches/warnings in effect for interior British Columbia...

Severe Thunderstorm Watch for:
=new= East Kootenay - south including Cranbrook
      Okanagan Valley
      South Thompson
      Shuswap
      North Thompson
      boundary
      arrow lakes - slocan Lake
      West kootenay
      Kootenay Lake
      100 Mile
      Cariboo.

      Severe thunderstorms possible this afternoon and evening.

      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.

Rainfall warning for:
      Fraser Canyon
      South Thompson
      boundary
      West Kootenay
      Kootenay Lake
      100 Mile
      Chilcotin
      b.C. Peace River.

      Significant rainfall amounts for parts of the British Columbia
      interior.

      This is a warning that significant rainfall is expected in
      these regions. Monitor weather conditions..listen for updated
      statements.

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==Discussion==
an upper low pressure system situated off the South Coast of British
Columbia this morning is forecast to give significant rainfall
amounts to sections of the interior. Moisture that is wrapping around
this system will continue to affect the b.C. Peace region through
much of today although the heavier rainfall is expected to occur over
areas near The Rockies where the northeasterly upslope flow enhances
precipitation intensity. Another 20 mm of rain is possible today over
these upslope areas while townsites that are located further away may
only receive 10 mm.

As the system continues to make its way southeastward, rainfall will
intensify or spread to the central and southern interior today and to
the kootenays early this evening. General rainfall amounts of 25 to
35 mm can be expected for parts of the central and southern interior
through this evening and for parts the kootenays tonight through
Wednesday.

This upper low pressure system will situate over the Washington and
Oregon states by Wednesday morning and then remain quasi-stationary
through much of this week. Moisture will continue to wrap around this
feature and affect the southern interior and the kootenays over the
next few days. There is still uncertainty to the location of this
wrap-around moisture but it is not out of the question that some of
the affected regions may experience a prolonged rainfall event.

Meanwhile, conditions are favourable for the development of
thunderstorms this afternoon over parts of the kootenays and the
southern and central interior. The potential exists that some of
these thunderstorms may become severe. These severe thunderstorms are
capable of giving large hail and damaging wind gusts.


Please refer to the latest public forecasts for further details.

End/..