It'll be a who knows what we'll get scenario again for this warning. Even the forecasters have no idea, so they did a blanket warning again.
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Originally Posted by Forecasters
OVER ALBERTA THINGS LOOK INTERESTING WITH A TROF SWINGING IN FROM
THE WEST COAST. AHEAD OF THE TROF IS A SOUTHEASTERLY FLOW THAT WILL
BRING MOISTURE INTO SOUTHERN ALBERTA TONIGHT. A SURFACE RIDGE IN
NORTHERN SASKATCHEWAN WILL HELP ENSURE THE TEMPERATURES WILL BE COLD
ENOUGH TO KEEP THE MAJORITY OF THE PRECIPITATION IS SNOW. THE
QUESTION THEN GETS TO BE HOW MUCH SNOW ARE WE GOING TO GET. AT THIS
POINT MOST MODELS ARE SUGGESTING 10 TO 15 MM OF PRECIPITATION BY 6AM
THURSDAY MORNING WITH MOST OF THAT FALLING NEAR CALGARY AND TO THE
SOUTHEAST. IN CONVERTING THAT LIQUID AMOUNT TO SNOW WE FIGURED ON A
COUPLE OF THINGS. WITH THIS SYSTEM THERE IS NOT A DEEP DENDRITIC
GROWTH ZONE (TEMPERATURES OF -12 TO -18) SO WE WERE KEEPING THE SNOW
WATER EQUIVALENT AROUND 10:1. ALSO THE SURFACE TEMPERATURES SHOULD
GET UP ABOVE ZERO AGAIN TODAY WITH ROAD SURFACE TEMPERATURES GETTING
WARMER THAN THAT. LAST NIGHT ROAD TEMPERATURES WERE STILL AROUND
PLUS 3 WHEN WE EXPECT THE SNOW TO START FALLING TONIGHT, SO WE ARE
EXPECTING THE FIRST FEW CM TO MELT. THERE MAY BE A FEW LOCALITIES -
CAR ROOFS AND BACK DECKS - WHERE THE SNOW DOESN'T MELT AS MUCH AND
MAY ACCUMULATE MORE. THE OTHER THING TO CONSIDER IS THIS MOVES
THROUGH SOUTHERN ALBERTA FAIRLY QUICKLY WITH MOST OF THE SNOW BEING
DONE BY NOON. THE SNOW WILL MOVE OUT OF SOUTHERN ALBERTA AND INTO
CENTRAL ALBERTA DURING THE DAY. ALSO, THIS AIRMASS IS QUITE STABLE
WITH THIS SYSTEM.
SO, SOUTHERN ALBERTA WILL SEE SOME HEAVY WET SNOW. AT THIS POINT WE
ARE GOING WITH A WIDESPREAD 5 TO 10 CM, BUT ARE REMAINING WATCHFUL.
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