Sunday, July 23, 2017

Cool tonight, gusty NE wind near Lake Superior (Partial clearing for some, areas of fog/low clouds for others) A bit nicer Monday afternoon

/Issued 3:55 PM CDT, Sunday, July 23, 2017/



One of the big weather stories last week were the swaths of heavy, excessive rains that affected portions of the upper Midwest.  Hardest hit areas included southern Wisconsin, far southeast Minnesota, eastern Iowa, northern Illinois and northwest Indiana with 3-6" rain totals along with locally higher amounts.  The map below shows total rainfall accumulation from July 16-22, 2017.


Precipitation departure map for the week of July 16, 2017.


Temperature departure map for the week of July 16, 2017.

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

July 16-22, 2017

High temperatures

7/16:  67 F/-10 degrees below normal
7/17:  84 F/+7 degrees above normal
7/18:  76 F/-1 degree below normal
7/19:  77 F/Normal
7/20:  84 F/+7 degrees above normal
7/21:  78 F/+1 degree above normal
7/22:  72 F/-5 degrees below normal

Low temperatures

7/16:  48 F/-8 degrees below normal
7/17:  48 F/-8 degrees below normal
7/18:  56 F/Normal
7/19:  54 F/-2 degrees below normal
7/20:  57 F/+1 degree above normal
7/21:  59 F/+3 degrees above normal
7/22:  54 F/-2 degrees below normal

Total precipitation:  1.85"
Normal:  0.82"
Departure:  +1.03" above normal

Weather Tidbits for Duluth, Minnesota (Airport location)

-Number of 80 degree days so far this month:  6 days (Average for July is 11 days)

-Number of 80 degree days so far this summer (June 1 - July 23) 10 days (Average for the summer season June 1 - August 31 is 23 days)

-Total rainfall since June 1st:  9.29 inches (+2.20 inches above normal)

-Total precipitation since January 1st:  20.43 inches (+4.42 inches above normal)

Note:  International Falls, Minnesota has had 15 days at or above 80 degrees so far this summer (June 1 - July 23)  Average for the summer season (June 1 - August 31) is 30 days

Note:  International Falls, Minnesota has had 12.62 inches of precipitation since January 1st (-0.62 inches below normal)

Weather Synopsis

Decreasing clouds this afternoon in northern Minnesota while it was still overcast farther south.  A few radar returns have been showing up this afternoon near Lake Superior, if anything is hitting the ground it's likely in the form of drizzle.  Highs today warmest where there's been some sun so far northern Minnesota made it into the 70s this afternoon while the rest of the area was stuck in the 60s which is ~15 degrees cooler than average for late July.

Northwest flow aloft covered the upper Midwest today with an upper low off to our east.  Moisture wrapping around that low has kept skies overcast except in far northern Minnesota where drier air has eroded the cloud cover this afternoon.

Will have clear to partly cloudy skies over the area tonight but areas of fog and low clouds are likely in parts of the Northland.  It'll be a cool night for some as high pressure builds over the region.  Lows will be in the 40s and 50s but can't rule out a few 30s in the typical cold spots.

Monday looks pleasant after the low clouds and fog burn off.  Highs are expected to be in the 70s, maybe a few locations out west around 80 degrees while it will be cooler near Lake Superior.

The next chance for some showers or thunderstorms comes Tuesday into early Wednesday morning as low pressure along with a few different frontal boundaries heads east out of the northern Plains.  Note:  Will have strong winds in the mid/upper levels of the atmosphere but not real sure yet on where the best combination of instability, warm air and moisture will setup, so a little too early to say if will have any strong or severe thunderstorms here in the Northland, those chances could be higher in parts of western, central or southern Minnesota according to a few of the computer models as of today.

Forecast for Duluth and Superior

.Tonight...  Mostly cloudy.  Areas of fog.  Some clearing possible at times.  Low 47 to 52.  Wind east at 10 to 15 mph.  Gusts to 20 mph this evening.

.Monday...  Low clouds or fog burning off giving way to mostly sunny skies by afternoon.  High 69 to 74.  Wind south to southeast at 10 to 15 mph.

Normal temperatures for Monday

High:  77
Low:   56

Sunrise Monday:  5:39 AM CDT
Sunset Monday:   8:50 PM CDT