Warm and very humid Tuesday; severe storms possible southwest
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Widespread areas of fog, some of it dense, have been lifting this Tuesday morning as heating gets underway. However, a dense fog advisory will remain in effect until 11 a.m. for near Lake Superior and areas surrounding Duluth-Superior.
Tuesday will remain warm and definitely on the humid side. High temperatures should be in the comfortable 70s up north. Much of Minnesota will warm into the 80s, and low 90s seem to be on tap in the south.
A heat advisory has been posted for counties bordering Iowa in south central and southeastern Minnesota for Tuesday afternoon and evening.
The Twin Cities should heat to about 88 with a gooey dew point near 70. An asterisk to this forecast is that it might become a bit less hot and muggy if the light northeast flow off Lake Superior progresses this far south.
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Severe storms possible southwest
Strong to severe thunderstorms seem likely to spread from eastern South Dakota across southwestern Minnesota in the general Luverne-Worthington-Pipestone area Tuesday afternoon. That corner of the state is in an enhanced (level 3 of 5) risk of severe weather.
The main risk should be damaging winds. A lesser risk of severe storms will be in the surrounding counties covered by slight and marginal risks.
The Twin Cities should remain storm-free for Tuesday but might get a storm or two Tuesday night.
Some relief on Wednesday
A cold front will cool us off a bit and lower the dew points for Wednesday. A scattering of showers and thunderstorms could pop in the unstable air.
Rewarming toward the weekend, with occasional storms
The atmosphere will remain typical July jittery thru the weekend. Thunderstorms could pop, often with the heating of the day, but sometimes at night under the influence of the nocturnal low level jet stream. Forecasting them much in advance is a work in progress.
Warmer temperatures will head our way for the weekend and into next week. The 6-10 day temperature outlook for July 10-14 (next Sunday through Thursday) calls for much of the country including Minnesota and Wisconsin to be hotter than normal.
Texas would seem to be in the thermal bull’s-eye.
