Monday, April 17, 2017

Rain late tonight-Tuesday (Isolated t-storms possible) Wintry mix especially north of Duluth. Storm reports from Sunday in this post

/Issued 5:35 PM CDT, Monday, April 17, 2017/


18z HRRR model


15z HRRRX model

A strong low pressure system moves into the Northland later tonight with a wintry mix in parts of northern Minnesota with mostly rain farther south.

Tonight's low temperature forecast.  Source:

Tuesday's high temperature forecast.  Source:

April 1-15, 2017 temperature departure map.  Source:

April 1-15, 2017 precipitation departure map.  Source:

Temperature departure map for the week of April 9th.  Source:

Precipitation departure map for the week of April 9th.  Source:

Temperature and precipitation report for Duluth, Minnesota (Airport location)

April 9-15, 2017

*=Tied for warmest low temperature

High temperatures:

4/9:  61 F/+15 degrees above normal
4/10:  46 F/Normal
4/11:  48 F/+1 degree above normal
4/12:  60 F/+13 degrees above normal
4/13:  59 F/+11 degrees above normal
4/14:  58 F/+9 degrees above normal
4/15:  70 F/+21 degrees above normal

Low temperatures:

4/9:  37 F/+10 degrees above normal
4/10:  31 F/+3 degrees above normal
4/11:  28 F/Normal
4/12:  30 F/+1 degree above normal
4/13:  31 F/+2 degrees above normal
4/14:  37 F/+8 degrees above normal
*4/15:  47 F+17 degrees above normal

Total precipitation:  0.33"
Normal:  0.55"
Departure:  -0.22" below normal

April 1-15, 2017 climate stats for Duluth, Minnesota

Average temperature:  44.9 degrees
Departure:  +8.9 degrees above normal

Total precipitation:  0.44"
Departure:  -0.63" below normal

Total snowfall:  0.0"
Departure:  -4.5" below normal

*4 days with a high temperature of at least 60 F
*1 day with a high temperature of at least 70 F

*7 days with a low temperature of 32 F or below

Record warm low temperature tied at Duluth, Minnesota

The low temperature on April 15th was 47 degrees -- This ties for warmest low temperature on record for the date, the previous record was set just one year ago in 2016.

Local Storm Reports from April 16, 2017

*5:05 PM:  HAIL.  0.25 inch.  Cohasset, MN 5 NE (Itasca County)

*5:16 PM:  HAIL.  0.25 inch.  Inger, MN 3 ENE (Itasca County)

*4:17 PM:  HAIL.  0.25 inch.  Duluth, MN 1 ENE (St. Louis County)

*3:33 PM:  HAIL.  0.25 inch.  Gary New Duluth, MN 1 WSW (St. Louis County)

*3:00 PM:  HAIL.  0.25 inch.  Wright, MN 7 N (St. Louis County)

Weather Synopsis for northeast Minnesota and northwest Wisconsin

Much cooler temperatures in parts of the Northland today especially near Lake Superior where highs were only in the 30s while farther inland highs made it into the mid 40s to low 50s.  Mostly cloudy skies during the morning gave way to a partly to mostly sunny sky this afternoon.  There was some patchy drizzle and snow flurries before Noon mainly near Lake Superior.

The big story for tonight and Tuesday will be a potent but fast moving storm system that'll move from its current location across the northern Rockies late this afternoon to western Lake Superior by early Tuesday evening.

Very strong lift will accompany this system which will help to develop widespread precipitation over the Northland by later tonight, precipitation will then continue Tuesday morning before ending from west to east Tuesday afternoon.

An impressive low level jet out of the south at 40-60+ knots will develop over our area tonight-Tuesday morning ahead of the surface low, this LLJ will transport deeper moisture north into our area as well as some elevated instability with CAPE of around 100-400 j/kg with mid level lapse rates ~7.0 c/km.  A few thunderstorms will likely be embedded in the area of rain from late tonight through early Tuesday afternoon.  Note:  Thunderstorms won't be severe but they could produce heavier downpours along with some lightning.

There will be enough cold air in place over far northern Minnesota to support a wintry mix of snow, sleet and freezing rain from early to mid morning Tuesday with some light ice accumulations and some snow accumulation possible.

Lows tonight will range from the 30s to around 40 degrees with highs Tuesday in the upper 30s and 40s across northern Minnesota to the 50s to low 60s in far southern portions of the Northland.

Forecast for Duluth and Superior

.Tonight...  Breezy.  Mostly clear early then increasing cloudiness.  Rain developing between 1-4 AM.  Low 31 to 35.  Wind east at 10 to 20 mph with higher gusts.

.Tuesday...  Rain.  Isolated thunderstorms possible.  Patchy fog.  Rain tapering to a few showers by mid or late afternoon.  Mostly cloudy.  High 45 to 50.  Wind east at 10 to 20 mph becoming west later in the day.

Normal temperatures for Tuesday

High:  51
Low:   31

Sunrise Tuesday:  6:15 AM CDT
Sunset Tuesday:   8:01 PM CDT