Friday, January 9, 2009

Weather in the Yukon

Weather forecast models are agreeing that the cold pattern currently in the Yukon will be reversing, and that temperatures will be above average next weekend.

The map on the right shows the temperature departures from average in colors about 1.5 km above the Earth's surface. The approximate location of Whitehorse is circled in black. Red shadings mean above average temperatures can be expected while blue shadings mean below average temperatures can be expected. At ~1.5km above the ground when you arrive, temperatures will be running 10-15 degrees Celsius (18-27 degrees Fahrenheit) above average! They will not be as strong at the ground, because snow cover helps moderate temperatures, but nonetheless they will be considerably above average. Currently, there is about 9 inches of snow on the ground at Whitehorse Airport.

HOWEVER, if you notice the arrow labeled 'Storm Track', you may have already deduced that the warm weather may come with a price. Although highly uncertain at this time, forecast models are calling for precipitation to begin late on Saturday the 17th, ending early on Monday the 19th. It is possible that precipitation may fall in the form of rain initially, but it is still too early to tell.

FYI, here is the average weather for Whitehorse, Yukon:
Average low, high = -7.6, +8 deg F
Coldest, warmest ever = -62, +48 deg F
Coldest wind chill = -78 deg F
Average wind speed = 8 mph
Maximum wind gust = 62 mph
Probability that temperature will get above freezing on any given day = 15%
Probability that temperature will fall below 0 deg F on any given day = 61%
Probability that snow will be on ground on any given day = 100%
Probability of measurable snow falling on any given day = 39%
Most snow falling on any one day = 5.5 inches
Average snow depth on ground = 11 inches
Greatest snow depth ever on ground = 33.86 inches

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