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Friday, December 25, 2015

Christmas Day Weather Blog

9:00pm

Overview
A low pressure system over the NE U.S. has a cold front stretched SW through the SE U.S. A Canadian cold front is stretched into the Northern Plains and across the Dakotas. A secondary low is over the Central Plains and continues to develop as it moves NE.


Discussion
A cold front that is stretched to the SW through the Northern Plains will continue to move Southeast. This front is bringing much cooler temps and heavy cloud cover, but no precip. A low pressure system over the Central Plains that is moving NE will interact with our passing cold front, over the Dakotas. The low will then ride our front and continue to move NE/ENE. This will bring a chance for snow through the Dakotas. As of 8:00pm, skies were cloudy and the Northern half of our state had temps near/ below zero. The southern & eastern parts of our state are significantly warmer (teens & 20s). The closest snow was along the southern fringe of North Dakota as our approaching low continued to move through the Central & Northern Plains. The mass of snow associated with this low will continue to move ENE until it begins interacting with our passing Canadian cold front. After Midnight the general motion of snow become ENE. Snow chances will be scattered before 1am, start to rise (south of I-94) through the early morning hours and begin to taper off (from west to east) before Noon. This will be a light snow event with accumulation totals ranging from 0"-3" for some of our viewing area. Most of the snow that we do see will be across the southern half of North Dakota. North of a line from Sidney through Garrison and to Devils Lake/Grand Forks will see little to no accumulation. From this same line to along and just south of the I-94 corridor, expect from a trace up to 2" possible. Well south of I-94, 2"-3" + is possible with higher accumulations for some especially as you look further into South Dakota.  



All of this being said, If the passing cold front speeds up or stalls out, event totals could vary (up or down) in either direction.
In the wake of this event, expect gradually clearing skies with temperatures plummeting into an unseasonably cold rang through the weekend. and into the beginning of the work week with more sunshine.


Through the rest of tonight & Saturday
Expect a chance for light snow accumulations across the southern half of our viewing area with cloudy skies. Temperatures will fall to either side of zero with a moderate wind that will swing around to the North and become variable. Temps coupled with winds will lead to chills well below zero and into the negative teens. Northern portions of our state will see chills that could approach -35. Forecast conditions have prompted a Wind Chill Advisory for the NW corner of ND. 
After a cold start, snow chances will begin to taper off during the later half of our morning. It will feel like it is getting cooler through the day as winds pick up and a much colder air mass keeps temps from climbing much at all. After sunset, temps will fall below zero. This will be the coolest air-mass that we have seen (going into this winter) so far.




 7day planner
A low pressure system and cold front will move through our area tonight & Saturday with a chance for snow. In the wake of this front temps will fall well below the seasonable norm (BIS avg. 4/24) through the weekend. Lows will be below zero with highs in the teens. The beginning of our work week will bring gradually warming temps and the approach of our next front (Tuesday/Wednesday) This could be our next chance for more snow, after tonight.


TONIGHT...Mostly cloudy skies with continued increasing cover and snow chances on the rise (Southern half of ND). Lows will fall to either side of Zero. NE/North wind 8-16mph. Chills below zero and in the negative teens. 50% chance for scattered snow.

SATURDAY...Tapering snow chances followed by decreasing clouds and falling temperatures. Highs 7-13. North/NW 5-15mph. Chills around or below zero. 

SATURDAY NIGHT...Expect continued clearing revealing to fair to partly cloudy skies with in & out clouds and cold temps. Lows -7 to 1. West/NW 2-10mph. Chills below zero & in the negative teens.

SUNDAY...Partly cloudy skies with more clearing for some and chilly temps. Highs 10-16. Winds swinging around to the SE 2-12mph. Chills near/below zero.

SUNDAY NIGHT...Fair to partly cloudy skies and cold. Lows -5 to 1. Light to moderate wind out of the SE. Chills in the -teens & -20s.

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