Showing posts with label ice. Show all posts
Showing posts with label ice. Show all posts

Sunday, January 15, 2017

Wintry Winter This Winter Be

This winter of 2016-17 has been in a nutshell, cold. Well relatively that is, I know folks in the North Dakota would be sweating like a hog in June with these temps we have. But this is not North Dakota, is it?

The annual average snowfall at my location over the past 16 seasons has been just about 8.5 inches; yet this winter season nearing the halfway mark, I have already measured 13.75 inches of fluffy white snow. And this is where the "cold" part is, that snow has stayed on the ground now for 22 of the last 45 days. Over my 16 winters at this location my average for the whole season is 14 days with at least a trace of snow on the ground. We are at 22 at the halfway mark. Of course it is entirely possible that no more snow will fall all year. If that happens this current snow will still lie here another 4-7 days before warmer temps and rain can wash it away.

In fact, this new year has yet to produce a temperature above 40 degrees. My year to date warmest high is a cool 37.9 degrees and every day this year has had overnight lows below the freezing mark, including 4 below 15 degrees. Average low so far has been a chilly 22 and the average high just 34 both marks WAY below my 16 year averages of 32 and 42 for the opening 2 weeks of January.

Cold snaps are a normal experience for any winter in this region, but extended periods of cold lasting more than a week are a bit uncommon. Of the 14 days that have passed this year, 4 of them refused to break the freezing barrier and those that did often did so for a only a couple hours or so. According to my hourly readings Starting January 1st at 12:00 AM and continuing till today, January 15th at 12:00 PM, 232 of 348 hours were below freezing. The mean daily temperature this year has been 28.4 degrees which is well below the typical daily mean of 37 this time of year.

The NWS in Portland seems to think that all of this cold air will washout with the series of Pacific storms that are approaching the coast now. They have made similar predictions on two occasions this season in which the cold air was more stubborn than they expected. So tomorrow night when the first of these disturbances move through, we shall see just how entrenched this cold air is. Meanwhile long term forecasts are suggesting more snow could be on the way for next weekend.

After the last two winters that only produced snow on one occasion each and with paltry accumulations, this season is delivering the goods as a wintry winter.

Monday, December 19, 2016

Winter Weather will transition to Classic Rain

Rain is washing snow away 10:00 am
Starting all the way back on December 4th when I got the first snowflakes of the season with a series of light flurries to this morning where another 3/4 inch of snow and then ice was deposited on my yard, I have accumulated just over 5 inches of winter precipitation and that is well above my 15 year average of 2.7 inches in December.

The first system brought an inch of wet snow that stayed on the ground for the afternoon but was gone my early evening. The second bout of snow brought me 2 inches of fluffy white snow and howling winds that blew the snow all over until it came to rest on the east side of some immovable barrier like a house or fence. That system had entrenched cold air that kept us chilly and left the snow on the ground for 4 days. Then another blast of arctic air mixed with moisture from the south made way north. The southern half of the metro area got upwards of 5 inches where I got about an inch and a half here in the north. The remnants of that snow and the fresh layer from this morning remain on the ground here on day six but it will be gone by the end of the day. I got 34 degrees showing and it is steady snow eating rain that is falling from the sky.

We are expected to see some locally heavy rain later in the week possibly 2-3 inches and snow levels will rise up above pass levels for a bit before returning to a more typical 2000-3000 feet.  But what of Christmas now just six days on the horizon? Right now the NWS in Portland has us forecast for a cool 38 on Christmas Day the low Christmas morning should be just a tad above freezing. This far out, who knows, a little shift in the atmosphere could drop us back into the snow zone. Statistics do not favor this however.

Let's sit back and soak it all up my friends, soak it up. Ho Ho Ho... Merry Christmas be it white or green :)