/Issued 7:13 PM CDT, Tuesday, July 31, 2018/
Goes-16 visible satellite image from ~8 PM Tuesday, July 31, 2018.
Radar loop ending at 8:25 PM CDT, Tuesday, July 31, 2018.
Showers and thunderstorms continue to move east/southeast across northern Minnesota this evening.
23z HRRR model 7.31.2018
Simulated Radar forecast valid from 11 PM tonight to Noon Wednesday
Scattered showers along with a few thunderstorms should continue tonight while moving to the east/southeast. Additional showers and possibly a thunderstorm or two are expected in parts of the Northland on Wednesday.
18z NAM 3km model 7.31.2018
Simulated Radar forecast from 7 PM Wednesday to 7 AM Thursday.
Light lake effect rain showers are possible Wednesday night near Lake Superior with NE winds turning N-NE early Thursday morning. 850mb temperatures of +3 to +6C are forecast over western Lake Superior with water temps around +15C, certainly enough of a difference in the surface to 850mb temperatures to produce some lake effect rain showers Wednesday night.
18z NAM-Nest model 7.31.2018
Note: August begins on Wednesday, here are the climate averages for the month of August at Duluth, Minnesota
Temperature: 64.3 degrees
Precipitation: 3.70 inches
Normal high on the 1st: 76 degrees
Normal high on the 31st: 71 degrees
Normal low on the 1st: 56 degrees
Normal low on the 31st: 52 degrees
Warmest August on record: 70.2 degrees set in 1930
Coldest August on record: 57.5 degrees set in 1912
Wettest August on record: 10.31 inches set in 1972
Driest August on record: 0.29 inches set in 1930
Average number of 80 degree days: 7
Most: 21 days set in August 1969
Fewest: 0 set in August 1977 and 1912
Astronomical Data for August
Sunrise on the 1st: 5:49 AM CDT
Sunrise on the 31st: 6:26 AM CDT
Sunset on the 1st: 8:41 PM CDT
Sunset on the 31st: 7:49 PM CDT
July 2018 weather tidbits for Duluth, Minnesota
•12th warmest going into today (31st) Average monthly temperature 69.0 F. Warmest July on record 71.9 degrees set in 2012 and 2009.
•20 days with a high temperature of at least 80 F — Tied with July 1943, 1921 and 1881 for 4th most 80 degree days on record for the month of July. Record is 25 days set July of 2012.
•It’s been a dry month, especially the second half of the month. The last time the Airport had more than a quarter inch of rain was on July 12 (0.40 inches of rain)
•3.28 inches of rain this month, -0.57 inches below normal.
Note: A complete climate summary for July 2018 will be issued on Wednesday.
And just like that we close out the month of July, and what a month it has been if you like warm temperatures! Fitting that the month ends on a warm note with widespread 80s across the Northland today under partly to mostly sunny skies.
The final month of Meteorological summer begins on Wednesday (August 1) and it will feel more like fall thanks to a strong cold front which plows through the area tonight. Our highs on Wednesday will occur early in the morning with temperatures ranging from 60 to around 70 degrees, temperatures during the day Wednesday are forecast to take a nose dive, ending up in the 50s by the afternoon!
Scattered showers and a few thunderstorms will continue to bubble tonight while moving E-SE. Additional rain showers are expected Wednesday along with overcast skies and a north/northeast wind.
A cold front over northern Minnesota early this evening will drop S/SE and will exit the Northland by Wednesday afternoon — Some showers will continue near this front through Wednesday.
Wednesday night could feature some light lake effect rain showers near Lake Superior with colder temperatures aloft moving over the warm body of water that is Lake Superior which by the way has water temperatures ranging from the upper 50s to lower 70s on this final day of July 2018.
Thursday looks dry with highs in the upper 50s to upper 60s, so another cool day.
The weather pattern flips to a warmer, more humid and potentially stormier one Friday and through the upcoming weekend. Dew points are expected to climb back into the 60s, perhaps close to 70 degrees starting Friday afternoon, and it looks to stay rather muggy through the weekend. A warm front and cold front moving into the upper Midwest combined with stronger winds aloft and favorable wind shear could set the stage for a few rounds of showers and thunderstorms some of which could be strong to severe Friday, Saturday and Sunday.
Duluth, Minnesota Climate Normals for August 1
Sunrise Wednesday: 5:49 AM CDT
Sunset Wednesday: 8:41 PM CDT