Saturday, May 20, 2017

Trace of snow reported in Duluth this afternoon. Ugly weather tonight with high winds and rain (Spotty t-storm possible after midnight)

/Issued 6:15 PM CDT, Saturday, May 20, 2017/

Source:  http://www.ssec.wisc.edu/data/wisc/




















Upper Midwest radar loop ending at 5:45 PM, May 20, 2017.  Source:  http://www.intellicast.com














It was cold enough today for some snow in parts of northern Nebraska (Blue area on map)  Check out this radar image from earlier this afternoon.  Source:  http://www.intellicast.com














Source:  http://weather.cod.edu

21z RAP model.  Most Unstable CAPE forecast valid at 5 AM Sunday morning.
















Weather Synopsis

Rain has been spreading from south to north across the Northland this afternoon thanks to a strong area of low pressure which was over northwest Iowa at 5 PM today.  Some of the precipitation has started out as sleet thanks to very dry air which was in place prior to when the precipitation reaches the ground...This has caused evaporative cooling to occur and this has been enough to produce some sleet this afternoon in parts of the Northland but for the most part precipitation has been in the form of rain.  Temperatures late this afternoon have cooled into the upper 30s to mid 40s with 50s holding on in extreme northern Minnesota.

Widespread rain continues this evening and some of the rain could be mixed with sleet in spots.  Precipitation from late tonight through Sunday evening will become more scattered from south to north over the Northland as the surface and upper level low pressure systems move overhead.

There will be a bit of an increase in elevated instability, and steeper mid level lapse rates will also advect into our area late tonight and Sunday...This could help to produce a few isolated thunderstorms in parts of the area but widespread thunderstorms are not expected.

Lows tonight in the mid 30s to lower 40s, highs Sunday only in the 40s which is around 20 degrees below average for late May.

Low pressure responsible for the wet weather for the rest of the weekend will track from northwest Iowa to eastern Minnesota by daybreak, and then into western Lake Superior Sunday evening, and to the north of Lake Superior Monday morning.

Note:  Those wanting sunshine will be waiting a while.  Although there could be some partial sun at times Monday and Tuesday, overall it looks mostly cloudy in our area through Tuesday.  Will likely have to wait til mid week (Wednesday) for sunnier skies the way it looks now.

Forecast for Duluth and Superior

.Tonight...  Windy.  Rain this evening.  Patchy sleet possible.  Scattered showers after midnight with some fog and drizzle also possible.  Low 36 to 39.  Wind east at 15 to 30 mph with higher gusts.

.Sunday...  Occasional showers.  Drizzle and fog possible during the morning.  Mostly cloudy.  High 45 to 49.  Wind east to northeast at 10 to 20 mph becoming north to northwest during the afternoon.

Normal temperatures for Sunday

High:  64
Low:   42

Sunrise Sunday:  5:27 AM CDT
Sunset Sunday:   8:44 PM CDT

Tim