/Issued 7:37 PM CDT, Monday, April 30, 2018/
23z HRRR model — Simulated radar forecast through 12 PM Tuesday. This model shows the bulk of tonight’s rain affecting north central Minnesota with scattered showers farther east including for areas near Lake Superior and in northwest Wisconsin.
May Climate Averages for Duluth, Minnesota
Temperature: 51.4 degrees
Precipitation: 3.23 inches
Snowfall: 0.4 inches
Records for May
Warmest: 57.4 degrees set in 1977
Coldest: 38.8 degrees set in 1907
Wettest: 7.99 inches set in 1879
Driest: 0.15 inches set in 1976
Snowiest: 8.1 inches in 1954
Average high on the 1st: 57
Average high on the 31st: 67
Average low on the 1st: 36
Average low on the 31st: 45
Astronomical Data for May
Sunrise on the 1st: 5:54 AM CDT
Sunrise on the 31st 5:18 AM CDT
Sunset on the 1st: 8:19 PM CDT
Sunset on the 31st: 8:53 PM CDT
High of 82 degrees at International Falls, Minnesota today (April 30) Last time it was 80 degrees or warmer was on September 12 (84 degrees) By the way the average date for first 80 is May 13 — A little ahead of schedule this year compared to average.
High of 71 degrees at Duluth, Minnesota today (April 30) Last time it was 70 degrees or warmer was on October 20 (75 degrees) By the way the average date for first 70 is April 21 — A little later this year compared to average.
April 2018 will finish as the 8th snowiest April on record at Duluth, Minnesota, and going into this final day of the month, April 2018 was the 5th coldest April on record. Monthly climate summary will be issued either Tuesday or Wednesday. Kind of a wild month around here.
A warm end to April with highs today in the 70s with even a few locations reaching 80 degrees or into the lower 80s! It was cooler though mainly along the North Shore of Lake Superior. Highs today were about 15-25 degrees warmer than average for April 30.
Parts of the Northland were hit with the season’s first thunderstorms early this morning with lightning and heavy downpours the main hazards from that activity. There’s been additional showers and isolated thunderstorms late this afternoon in parts of east central Minnesota and far northern Wisconsin.
Surface low early this evening places an area of low pressure of 1000mb over southwest Ontario Province with a cold front over the northern Plains into far northwest Minnesota. Southwest flow aloft was in place ahead of this system across the upper Midwest while an upper level trough covered the Rockies.
The atmosphere is juiced up a bit with dew points ahead of the cold front in the mid 40s to low 50s with PWATS around 1.00 inch over northeast Minnesota and northwest Wisconsin.
Scattered showers and a few thunderstorms will redevelop during the night while affecting portions of the Northland. The overall risk for severe weather is quite low, but an isolated stronger storm could develop with a threat for hail or gusty winds, otherwise heavy downpours and occasional lightning will remain the primary threats tonight. Cold front will be moving slowly toward the east through Tuesday morning, this front is forecast to be south/east of the Northland by late Tuesday afternoon.
Temperatures tonight will be on the mild side with lows ranging from the mid 40s to mid 50s. Highs Tuesday will range from 50s in northern Minnesota to the 60s/around 70 degrees in eastern Minnesota and northwest Wisconsin.
There could be a few showers Tuesday morning in northern Minnesota with a few more showers in northwest Wisconsin during the afternoon.
Forecast for Duluth and Superior
.Tonight… Partly to mostly cloudy. Scattered showers and isolated thunderstorms possible. Low 50 to 55, cooler near Lake Superior. Wind south to southeast at 10 to 15 mph.
.Tuesday… Partly to mostly cloudy. A few showers possible early. High 60 to 65. Wind west at 10 to 20 mph.
.Wednesday… Partly sunny. High 59 to 64. Wind north at 10 to 15 mph becoming west.
Average temperatures for Tuesday
Sunrise Tuesday: 5:54 AM CDT
Sunset Tuesday: 8:19 PM CDT