Thursday, August 3, 2017

Today, August 3, 2017 -- 7th wettest and 4th coldest on record at Duluth, Minnesota (Dating back to 1870) 1-3 inch rainfall totals in parts of the Northland today; Gusty north winds, lingering light rain/drizzle tonight.

/Issued 5:26 PM CDT, Thursday, August 3, 2017/



Water vapor satellite loop from today, August 3, 2017.  A well developed storm affected the Northland today, kind of unusual to see a system like this in early August, more typical to see a storm like this during the fall months.


Visible satellite loop from today, August 3, 2017.


Radar loop ending at 5:30 PM CDT, August 3, 2017.  Heavier downpours in the yellow and orange colors, otherwise just some light rain or drizzle lingering this evening.


18z HRRRX model run

Preliminary rainfall totals for August 3, 2017

Note:  Totals listed below are through Thursday afternoon.

Hinckley, MN 2 SW:  3.30 in
Superior, WI:  2.75 in via tweet @DanPavlatos
Kettle River, MN:  2.13 in
Siren, WI:  2.08 in
Finlayson, MN 7 WSW:  2.04 in
Hinckley, MN:  1.99 in
Brainerd, MN 2 NNE:  1.77 in
Moose Lake, MN:  1.55 in
Hill City, MN:  1.48 in
Saginaw, MN:  1.37 in
Scanlon, MN 1 W:  1.36 in
Superior, WI:  1.35 in
Barnes, WI:  1.34 in
Solon Springs, WI:  1.32 in
Brainerd, MN:  1.30 in
Washburn, WI:  1.27 in
Duluth, MN (Airport)  1.14 in
McGregor, MN:  1.12 in
Glidden, WI:  1.04 in
Hayward, WI:  1.03 in
Ashland, WI:  1.03 in
Minong, WI:  0.95 in
Pine River, MN:  0.86 in
Clam Lake, WI:  0.77 in
Isabella, MN:  0.66 in
Eveleth-Virginia, MN:  0.58 in
Walker, MN:  0.56 in
Phillips, WI:  0.56 in
Grand Rapids, MN:  0.55 in
Chisholm-Hibbing, MN:  0.44 in
Cass Lake, MN:  0.41 in
Grand Marais, MN:  0.06 in
Ely, MN:  0.03 in

Weather Synopsis

A real soaker in parts of the Northland today as an unusually strong system for the time of year affected the area.  At 4 PM today the surface low was over southwest Wisconsin with a pressure of 1009mb.  Strong upper level dynamics accompanied today's system with an 70 knot upper level jet to our southwest and also well to our north, that placed east central Minnesota and northwest Wisconsin in a favorable zone for several hours of moderate to heavy rainfall this morning into the early afternoon hours.  Note:  Rainfall totals of 1 to as much as 3 inches have fallen today generally along and south of the Highway 2 corridor in northeast Minnesota, including the Interstate 35 corridor, west to the Brainerd Lakes, also including most of northwest Wisconsin.  Rainfall amounts tapered off significantly once you got north of a Hibbing to Silver Bay line with generally a trace to a few hundredths inch of rain up by Ely and Grand Marais through 4 PM today.

As of late this afternoon most of the area was now on the NW quadrant of the surface low with more of a deformation band of mostly light rain affecting northeast Minnesota and parts of northwest Wisconsin.

Temperatures today were also a big story with highs only in the 50s which is roughly 20-25 degrees below average for August 3.  It was a little warmer in far northern Minnesota with highs in the 65 to 70 degree range, this thanks to little or no rain up in that area today.

Light rain will continue tonight in northeast Minnesota and northwest Wisconsin but the rain will be coming to an end from NW-SE later in the night as low pressure over southwest Wisconsin moves toward far northeast Wisconsin by daybreak.  A few spotty showers across north central Minnesota early this evening will end by around sunset.  Partly to mostly cloudy skies are forecast tonight with some fog possible.  Lows will be in the 40s and 50s.  Gusty north winds to 20-30 mph will also occur tonight on the backside of this early August storm with the strongest winds affecting northwest Wisconsin and near Lake Superior.

Compared to today's weather, Friday is looking quite a bit nicer! Low pressure will move slowly E/NE through the central/eastern Great Lakes region while cold temperatures aloft (500mb temps around -20C) combines with warmer temps near the surface, this will make the atmosphere a bit unstable which lead to the development of a few showers and perhaps a thunderstorm during the afternoon-early evening hours.  Brief downpours are possible Friday PM but widespread rain like we saw today is unlikely.  Highs Friday will range from the upper 60s to middle 70s.

Saturday and Sunday should be similar to Friday in that will have a potential for a few pop up showers/isolated thunderstorms especially during the afternoon-early evening hours, but we should also see some sun both days.  Highs generally in the mid 60s to mid 70s both Saturday and Sunday.

Note:  Top 5 coldest high temperatures on record at Duluth, Minnesota for August 3 (Records date back to 1870)

1:  54 degrees in 1954
2:  55 degrees in 1952
3:  56 degrees in 1903
4:  57 degrees in 2017
5:  58 degrees in 1915

Note:  Top 10 wettest August 3 on record at Duluth, Minnesota (Records date back to 1870)

1:  2.80 inches in 1880
2:  2.18 inches in 1881
3:  2.06 inches in 1953
4:  1.43 inches in 2005
5:  1.34 inches in 1924
6:  1.30 inches in 1956
7:  1.14 inches in 2017
8:  1.04 inches in 1994
9:  1.02 inches in 1952
10:  0.96 inches in 1937

Forecast for Duluth and Superior

.Tonight...  Breezy.  Lingering light rain and drizzle otherwise mostly cloudy.  Low 49 to 54.  Wind north at 15 to 30 mph this evening, becoming northwest at 10 to 20 mph late.

.Friday...  Partly to mostly cloudy.  Isolated afternoon-early evening showers.  Milder.  High 70 to 75.  Wind northwest at 10 to 20 mph.

.Saturday...  Partly to mostly cloudy.  Isolated afternoon-early evening showers possible.  High 70 to 75.  Wind northwest at 10 to 20 mph.

Normal temperatures for Friday

High:  76
Low:   56

Sunrise Friday:  5:53 AM CDT
Sunset Friday:   8:36 PM CDT