Tuesday, June 6, 2017

Clear/Cool tonight; Warm with a few showers/t-storms later Wednesday afternoon or night; Muggy weekend ahead!

/Issued 5:53 PM CDT, Tuesday, June 6, 2017/

Source:  http://www.pivotalweather.com

12z NSSL WRF model valid for Wednesday afternoon.

A southwest flow aloft is still expected to develop this weekend, carrying over into the early part of next week -- A very warm and increasingly more muggy airmass will spread into the upper Midwest while a frontal boundary sets up from the northern Plains and points east.  The atmosphere will likely become quite unstable starting Saturday and continuing through next Tuesday, this coupled with strong winds in the mid/upper levels of the atmosphere could result in multiple rounds of thunderstorms in some parts of the Northland this weekend into early next week.  One thing we will be dealing with, however, is a rather strong cap (Warm temperatures aloft) this cap may hold strong and prevent a lot of storms from developing so that will be something to watch over the weekend.

Low temperature reports from this morning, June 6, 2017
Source:  http://www.weather.gov/dlh/

Superior, WI:  34 F
Solon Springs, WI:  34 F
Hibbing, MN:  36 F
Silver Bay, MN:  36 F
Siren, WI:  36 F
Cotton, MN:  36 F

Weather Synopsis

Near perfect late spring weather conditions continue!  High pressure over the upper Great Lakes combined with an upper level ridge over the upper Midwest resulted in mainly sunny skies today.  A chilly start to the day for some but temperatures rebounded quickly with afternoon highs in the 70s to lower 80s with cooler temperatures closer to Lake Superior but the lake breeze these past two days has not been bad at all compared to how it has been recently.

Another tranquil weather night ahead under clear to partly cloudy skies.  Lows will settle into the 40s and 50s, perhaps a few 30s again in the traditional cold spots mainly in northern Wisconsin.  Could also see the development of some low clouds/fog late tonight especially near Lake Superior.

Changes in the weather will occur Wednesday as a weakening cold front approaches from the northern Plains -- Temperatures will remain on the mild side ahead of this front with highs in the 70s to lower 80s except for cooler temperatures closer to Lake Superior.  Dew points are expected to climb into the 50s as the front approaches thanks to the southerly flow ahead of this front.  Instability will also increase and should maximize over portions of north central Minnesota where CAPE could approach 1000 j/kg during the afternoon.

Scattered showers and some thunderstorms are forecast to develop over western sections of the Northland Wednesday afternoon, this activity will then spread farther to the east Wednesday night.

There could be a few lingering showers or thunderstorms in parts of the Northland Thursday afternoon but overall the end of the week (Thursday-Friday) looks dry for most of the area with Friday looking like the drier day of the two.

Forecast for Duluth and Superior

.Tonight...  Mostly clear.  Low 43 to 48.  Wind east at 5 to 15 mph.

.Wednesday...  Partly to mostly sunny.  High 75 to 80 but cooler closer to Lake Superior.  Wind becoming south to southwest at 10 to 20 mph.

.Wednesday night...  A few showers and possibly a thunderstorm.  Lows in the 50s.

.Thursday...  A few showers and possibly a thunderstorm.  Highs in the 70s.

Normal temperatures for Wednesday

High:  68
Low:   47

Sunrise Wednesday:  5:15 AM CDT
Sunset Wednesday:   9:00 PM CDT