/Issued 4:00 PM CST, Sunday, December 14, 2014/
Messy weather on the way!
Water vapor satellite image from 4:15 PM CST Today. Source, College of Dupage website.
L=Low pressure and the black line represents the expected storm track.
The low over southwest Kansas looks very nice on satellite Today, textbook storm!
Surface map valid for 6 AM Monday. Precipitation should be in the form of rain or drizzle Tomorrow Morning in northeast Minnesota and northwest Wisconsin (Green area on the map)
Surface map valid for 6 PM Monday. Low pressure over extreme southeast Iowa, high pressure in western Manitoba. Colder northerly flow develops between these two features allowing the rain to turn to frozen precipitation.
Blue=Snow
Purple and orange=Mixed precipitation
Green=Rain
A closer view of the precipitation types for this event per 18z NAM 32km forecast model. Source, tropicaltidbits.com
3 PM Monday:
6 PM Monday:
9 PM Monday:
3 AM Tuesday:
Weather headlines map. Source, hamweather.com
Pink=Winter Storm Warning
Purple=Winter Weather Advisory
Charcoal/grayish color=Dense Fog Advisory
…Winter Weather Advisory issued for portions of the Northland…
http://forecast.weather.gov/wwamap/wwatxtget.php?cwa=dlh&wwa=winter%20weather%20advisory
…Dense Fog Advisory remains in effect…
http://forecast.weather.gov/wwamap/wwatxtget.php?cwa=dlh&wwa=dense%20fog%20advisory
For Duluth and Superior: Dense Fog Advisory continues through Noon CST Monday; Winter Weather Advisory from 3 PM Monday until 6 AM CST Tuesday per NWS.
At 4 PM CST: Low pressure of 1008mb was over eastern North Dakota with another low of 996mb over southwest Kansas. It was another day filled with dense fog and drizzle and overcast skies around northeast Minnesota and northwest Wisconsin. Unseasonably warm temperatures continued too with highs Today in the 30s and 40s. Heights have come down compared to the past two days. Remember on Friday and Saturday H5 heights ranged from 570-576 meters across Minnesota, late This Afternoon 500mb heights were at 564 meters.
Dense fog, drizzle, and some light rain will be found over northeast Minnesota and northwest Wisconsin Tonight and Monday Morning. Temperatures aloft and at the surface will remain warm enough for the precipitation to remain in liquid form. Use extreme caution if you have travel plans Tonight as the fog will reduce visibility to near zero at times.
Changes will be taking place from northwest-southeast Monday Afternoon and Evening as the low now over southwest Kansas positions itself over eastern Iowa…Colder temperatures will start to move into the Northland on Monday which will cause the rain and drizzle to mix with freezing rain, sleet, and snow — eventually turning over to all snow. Northern-western parts of the area will see the changeover first with northwest Wisconsin seeing the mix/change over take place Monday Evening.
Ice accumulations are expected to be less than 0.10″ with the potential for a few inches to several inches of snow accumulation across east central and northeast Minnesota from late Monday Afternoon through Monday Night.
Travel will likely become hazardous across the northland either during the day on Monday or more likely holding from Monday Night into Tuesday Morning.
Tim