/Issued 6:27 PM CDT, Monday, May 28, 2018/
Radar loop through 6:30 PM CDT, Monday, May 28, 2018 — Strong to severe thunderstorms continue to lift north across southern, central and eastern Minnesota late this afternoon, these storms may start to impact southern portions of the Northland before 8 PM if they hold together as they continue to lift north/northeast through the evening.
18z NAM-Nest model
18z NAM-Nest model Simulated Radar Forecast valid through 1 AM Thursday. Waves of scattered showers and thunderstorms affecting the Northland during the next few days.
Goes-16 visible satellite loop from Monday, May 28, 2018 — Strong to severe thunderstorms erupting over and around the Twin Cities metro area late this afternoon.
May heat wave continues today with widespread 90+ degree temperatures this afternoon across the southern half of Minnesota into much of Wisconsin, a few locations in the Twin Cities metro area even made it to 100 degrees today, incredible!
It was a stormy Sunday night in parts of the Northland with areas of thunderstorms training or moving over the same location for several hours — Some of the strongest thunderstorms and greatest rainfall totals were found near Highway 2 in northeastern Minnesota.
12z European Ensemble model from May 28, 2018
Certainly seeing a trend toward a cooler weather pattern which could start later this week especially near Lake Superior with a stronger lake breeze thanks to a Hudson Bay high which could set up Friday through Sunday — Then for next week cooler than normal temperatures are possible over a wide area from the northern Plains and upper Midwest through the Great Lakes and eastern U.S.
Rainfall Reports for May 27-28, 2018
Swan River, MN: 1.41 in
7 SE of Grand Rapids, MN: 1.03 in
7.4 NNE of Duluth, MN: 1.01 in
Duluth Airport: 0.81 in
Winter, WI: 0.47 in
Ashland, WI: 0.38 in
Hayward, WI: 0.38 in
Hibbing, MN: 0.25 in
4 E Island Lake, MN: 0.25 in
Butternut, WI: 0.23 in
4 W Clam Lake, WI: 0.23 in
Hurley, WI: 0.19 in
Wolf Ridge, MN: 0.17 in
Local Storm Reports for May 27-28, 2018
8:30 AM CDT 5/28: HAIL — 0.75 inch. 3 W McGregor, MN (Aitkin County) The duration of the hail event was 5 minutes.
10:46 PM CDT 5/27: HAIL — 0.25 inch. 3 NE Twig, MN (St. Louis County)
9:43 PM CDT 5/27: HAIL — 0.50 inch. 1 W Bovey, MN (Itasca County)
…Record warmth or a top 5 warmest temperature for some locations in the Northland on May 27, 2018…
New record high for May 27 with a high on Sunday of 88 degrees. The previous record high for May 27 was 86 degrees set in 1969.
2nd warmest high temperature on record for May 27 with a high on Sunday of 89 degrees. The record high for May 27 is 91 degrees set in 1969.
5th warmest high temperature on record for May 27 with a high on Sunday of 83 degrees. The record high for May 27 is 89 degrees set in 1980.
May 2018 Heat Wave continues!
•Minneapolis/St. Paul, Minnesota: High temperature of 100 degrees today (May 28, 2018) Only the second date in the month of May the Twin Cities have reached 100 degrees.
New records set in the Twin Cities for today, May 28
•Earliest date to hit 100 degrees (Previous earliest was May 31, 1934, 106 degrees)
•Record high on May 28 (Previous record 98 degrees on May 28, 1934)
•Warmest Memorial Day! (Previous warmest 98 degrees in 1934)
•8 days so far this month at or above 80 degrees at Duluth, Minnesota — May 2018 is now tied with May 1980 for greatest number of 80 degree days for the month of May.
Upper level ridge of 5820 meters continues to cover the central Plains, north to the upper Midwest and east through the Great Lakes. The airmass underneath this ridge remains unseasonably hot with 925mb temperatures this afternoon of +20 to +30C from western/central Canada, south into the central Plains.
Showers and thunderstorms which impacted some parts of the Northland late last evening into this morning moved out before Noon with mainly clear to partly cloudy skies in our area this afternoon. Another very warm day with highs in the lower 80s to upper 80s although it was cooler near Lake Superior with temperatures in the 60s to lower 70s today.
The weather pattern won’t change a whole lot through Wednesday. Expect warm and muggier conditions away from Lake Superior with low temps tonight and Tuesday night in the 50s and 60s with highs Tuesday and Wednesday in the 70s and 80s with a few locations close to 90 degrees Tuesday afternoon. Dew points are expected to be in the 60s.
Near Lake Superior it will be cooler thanks to an easterly breeze off the lake, this will lead to low temps in the 40s and 50s tonight and Tuesday night with highs Tuesday and Wednesday from the lower 50s to middle 60s. Areas of fog could also develop at times through Wednesday.
A frontal boundary over southern Minnesota today won’t be moving much through Wednesday while a cold front approaches from the NW on Wednesday. Plenty of moisture and instability will remain over the upper Midwest which will help to produce more scattered showers and thunderstorms from tonight through Wednesday night. Heavy rain and lightning will be the biggest threats from these storms with at least some potential for flooding where or if thunderstorms train over the same location for a few hours. Note: There is also a risk for a few strong to severe thunderstorms tonight, and again Tuesday afternoon/evening with strong wind gusts and some hail possible with the stronger thunderstorms.
Forecast for Duluth and Superior
.Tonight… Clear to partly cloudy this evening followed by partly to mostly cloudy skies late. Scattered showers and thunderstorms possible. Low 50 to 55. Wind east at 10 to 20 mph.
.Tuesday… Partly to mostly cloudy. Showers and thunderstorms possible early and again later in the day. Patchy fog possible near Lake Superior. High 69 to 74 but cooler near Lake Superior. Wind east at 10 to 20 mph.
.Wednesday… Mostly cloudy. Scattered showers and thunderstorms possible. Patchy fog possible near Lake Superior. High 69 to 74 but cooler near Lake Superior. Wind east at 10 to 15 mph.
Normal Temperatures for May 29
Sunrise Tuesday: 5:20 AM CDT
Sunset Tuesday: 8:53 PM CDT