/Issued 5:51 PM CDT, Friday, May 13, 2016/
Freeze and frost headlines cover a large portion of Minnesota for tonight. More information at the links below. Source, Aerisweather.com; National Weather Service.
Freeze warning (Purple shaded area on map) http://forecast.weather.gov/wwamap/wwatxtget.php?cwa=dlh&wwa=freeze%20warning
Frost advisory (Blue area on map) http://forecast.weather.gov/wwamap/wwatxtget.php?cwa=dlh&wwa=frost%20advisory
Low temperature forecast for tonight. Source, National Weather Service Duluth, Minnesota.
Wind chills (Feels like temperatures) late tonight through Saturday morning are forecast to be in the teens and 20s across northeast Minnesota and northwest Wisconsin with possible single digits in far northern Minnesota. Source, National Weather Service Duluth, Minnesota.
High temperature forecast for Saturday. Source, National Weather Service Duluth, Minnesota.
Temperatures tomorrow should be quite similar to what we saw today (Friday) maybe a a few degrees warmer in a few locations but a widespread chill for mid May continues on Saturday.
Low pressure approaching from the northwest could bring some rain to the Northland late this weekend. At this time it appears that most of the rain will stay west and north of Duluth on Sunday with rain chances possibly increasing in the Twin Ports Sunday evening or Sunday night. Map below is valid for Sunday evening. Source, Weather Prediction Center.
Weather Summary for NE Minnesota and NW Wisconsin
Date: May 13, 2016
Impressive shot of cold air for the middle of May! Mid and upper level low covered Ontario Province with high pressure over the northern Rockies. Mostly cloudy skies were common today although there's been some brief holes in the clouds which led to a few peeks of sun. High temperatures today were in the 40s with 30s across northern Minnesota. Winds today were out of the northwest at 10 to 20 mph with higher gusts. Scattered showers of snow, rain and graupel have occurred today in parts of the Northland thanks to the unseasonably cold airmass which has invaded the area today.
Forecast Discussion for NE Minnesota and NW Wisconsin
Not much change through Saturday night -- Upper level low remains to our north/northeast with lots of cold air covering the Upper Midwest and western Great Lakes. 850mb temperatures are forecast to bottom out at -8 to -14C while 500mb temperatures fall to between -25 and -30C. Scattered snow, rain and graupel showers will persist tonight and Saturday although the coverage of these showers should be a bit less tomorrow compared to what we saw today.
The unusually cold temperatures moving over the relatively 'milder' inland lakes including along the South Shore of Lake Superior could result in the formation of somewhat heavier lake effect snow showers or mixed showers through Saturday morning with a coating of slushy accumulation certainly possible.
Low temperatures tonight will be in the 20s and 30s with highs on Saturday mainly in the 40s. Lows Saturday night should mainly be in the 30s but 20s are possible once again in some parts of the area. Northwest winds through Saturday evening at 10 to 20 mph with higher gusts. Winds late Saturday night will turn more to the west.
Sunday and Monday could be a little wet at times as a northwest flow aloft remains in place, embedded in this flow will be an upper level disturbance which is forecast to drop southeast into the Upper Midwest late this weekend, this feature has the potential to bring some rain to parts of northeast Minnesota and northwest Wisconsin either Sunday or during the Sunday night-Monday time frame.
Warms up a bit on Sunday with highs in the 40s and 50s, a few locations might even make it into the 60s but that will depend on how much sunshine we see on Sunday.
Next week does look milder especially by mid to late week, this is when 60 and 70 degree high temperatures should return to most of the Northland although near Lake Superior it could be cooler depending on how the wind direction sets up.
***RECORD LOW TEMPERATURE FOR MAY 14***
Duluth, Minnesota: 27 degrees set in 1921.
International Falls, Minnesota: 24 degrees set in 2004.
Normal temperatures for Saturday at Duluth
Sunrise Saturday: 5:34 AM CDT
Sunset Saturday: 8:36 PM CDT