story updated at 2:00pm on Saturday March 23, 2013

ST. LOUIS (KMOX)-The latest National Weather Service forecast models show the St. Louis metro area in line for 8 to 12 inches of snow accumulation on Sunday.

NWS meteorologist Scott Truett says the first wave, early Sunday, will be rain changing to snow— then expect a lull — followed by the “extremely heavy” stuff falling during daylight hours.

He says if the storm contains thunder— amounts could go higher— easily topping 12 inches.

Truett says areas south of the Saint Louis metro will have much smaller snowfall accumulation, to the north a bit more.

With the type of heavy, wet snow anticipated, a primary threat is tree limbs and power lines snapping.

Click here for a link to National Weather Service snowfall prediction.

our earlier story:

ST. LOUIS (KMOX) – A winter storm is moving into the region.

As of Saturday morning, the National Weather Service said it should hit the St. Louis area Saturday night-starting as rain-then turning to snow early Sunday.

NWS Meteorologist Laura Kanofsky told KMOX’s Total Information AM her prediction is five to seven inches snow accumulation for the metro area, or even more if the storm combines with thunder snow, “You know how when you have a thunderstorm in the springtime, the rain can become heavy? Well, the same thing can happen when it’s cold enough to snow. The significance of thunder snow is when that occurs while snow is already falling, you get an increased in the snowfall rate.”

Kanofsky said the storm should taper off to flurries, later Sunday.


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