Frost Advisory issued for northern Minnesota. Chilly tonight; some sun, cool Saturday; stormy weather Sunday-Monday

Frost advisory has been issued for northern Minnesota and for parts of northeast Minnesota, the frost advisory is in effect from 10 PM this evening to 9 AM Saturday. Some cities included in the advisory are International Falls, Bigfork, Grand Rapids, Hill City, Hibbing, Cook, Orr, Ely and Isabella. Temperatures in the upper 20s to lower 30s early Saturday morning in the advisory area. Frost could harm sensitive vegetation.

Low temperature forecast for Saturday morning, September 28. Source: https://graphical.weather.gov

High temperature forecast for Saturday, September 28.

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A classic fall storm on the way this weekend!

Check out this temperature gradient for Sunday evening (see map below)

Strong warm air advection with rounds of showers and thunderstorms expected in the upper Midwest Sunday and Monday while a major winter storm hits the Northern Rockies in the cold air on the backside of low pressure.

Source: 18z NAM model; https://weather.cod.edu

We’ve reached the time of year where we can get a colorful headlines map, and this is the case this Friday evening with many different weather headlines in effect. Source: https://www.spc.noaa.gov/

Saturday will be a dry day in the Northland, but some showers could arrive from the SW Saturday night. Occasional showers expected Sunday along with cool temperatures and easterly winds. Also of interest to some is the snow that gets going Saturday (blue colors on map) over the Northern Rockies.

Note: Radar forecast below is from 7 AM Saturday to 1 AM Monday.

Source: 18z NAM model; https://weather.cod.edu

Here’s the latest snowfall forecast and impacts ahead of the historic winter storm set to hit the Northern Rockies this weekend.

Source: https://www.weather.gov/tfx/

Source: https://www.weather.gov/mso/

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Rainfall Reports from Thursday night-Friday, September 26-27, 2019. Source: https://mesowest.utah.edu

  • Minong, WI: 0.32″
  • Washburn, WI: 0.27″
  • Barnes, WI: 0.26″
  • International Falls, MN: 0.24″
  • Clam Lake, WI: 0.23″
  • Hayward, WI: 0.22″
  • Hinckley, MN: 0.20″
  • Ashland, WI: 0.19″
  • Grand Marais, MN: 0.18″
  • Solon Springs, WI: 0.18″
  • Siren, WI: 0.17″
  • Isabella, MN: 0.16″
  • Hibbing-Chisholm, MN: 0.14″
  • Ely, MN: 0.13″
  • Glidden, WI: 0.11″
  • Duluth, MN (Airport) 0.10″
  • Silver Bay, MN: 0.09″
  • Brainerd, MN: 0.08″
  • Two Harbors, MN: 0.07″
  • Grand Rapids, MN: 0.07″
  • Cloquet, MN: 0.06″

…Weather Summary…

System which brought some rain to the Northland last night and this morning has moved off to the east, but clouds have lingered all day in most of the area in a cold air advection pattern, but clearing is occurring late this afternoon across northern Minnesota, and the clearing line is pushing south-southeast late this Friday afternoon per Goes-16 satellite imagery.

Skies will clear from NW-SE tonight which will set the stage for a chilly Saturday morning as lows fall into the 30s to lower 40s with a few 20s in the typical cold spots in northern Minnesota. Winds will be out of the north or northwest at 5 to 15 mph.

A cool but nice Saturday is expected under mostly sunny to partly cloudy skies. Highs ranging from the lower 50s to around 60 degrees with variable winds around 10 mph.

Changes begin Saturday night as a large trough and area of low pressure set up across the Rockies while a cold front, the same one that moved through our area last night begins to lift back north as a warm front, this front is forecast to be near the Kansas-Oklahoma border Saturday evening, reaching the Minnesota-Iowa border Sunday evening. A strong low level jet begins to transport warm and humid air north out of the Plains Saturday night, and this should cause some showers to break out across the Northland Saturday night but more so during the day Sunday.

As the low level jet continues to pump warm and humid air north on Sunday, it will also help transport increasing amounts of elevated instability into the Northland which will cause thunderstorms to develop Sunday afternoon through Sunday night, a few of the storms could become strong to severe Sunday night with a threat for hail.

Monday could be an interesting day with a large temperature gradient possibly setting up over the Northland along with the risk for strong to severe thunderstorms. Temperatures Monday afternoon could range from the mid 40s to low 50s in northern Minnesota and Arrowhead areas with 70s to near 80 degree temps possibly pushing north into eastern Minnesota and southern portions of northwest Wisconsin. A warm front is forecast to continue lifting north on Monday while a cold front and area of low pressure approach from the west — Computer models show ample amounts of instability remaining over central and eastern Minnesota into northern Wisconsin Monday, and this coupled with strong mid and upper level winds spreading into the upper Midwest could lead to strong to severe thunderstorm development Monday into Monday evening over parts of the Northland. Note: Storms on Monday could have a tornado threat depending on how things set up, otherwise storms would be hail and or wind producers. Stay tuned.

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Forecast for Duluth and Superior

.Tonight… Mostly cloudy this evening followed by decreasing cloudiness. Patchy frost possible. Low 35 to 40. Wind north to northwest 5 to 15 mph.

.Saturday… Mostly sunny with some increase in cloudiness in the afternoon. High 55 to 60. Wind north to northwest 5 to 15 mph.

.Sunday… Breezy and cool. Mostly cloudy. Occasional showers. Isolated thunderstorms possible. Drizzle and fog. High 47 to 52. Wind east 10 to 20 mph with gusts to 25 mph.

Normal temperatures for Saturday

  • High 60
  • Low 41
  • Sunrise Saturday 7:03 AM CDT
  • Sunset Saturday 6:55 PM CDT

Thanks for reading!

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