Twin Cities Long Heat Waves On/Before June 15th Are Not Common

This stretch of early-season heat will go down in the record book for more than just the record highs that have been set. The Minnesota State Climatology Department complied some early-season (occurring on or before June 15th) heat stats, and only found five times in Twin Cities history where there have been at least five consecutive days with a high of 90F or greater. The most on record are six in a row, set three times – most recently between May 24-29, 2018, which included the earliest 100F on record on Memorial Day 2018. If highs do remain at or above 90F through at least Thursday as the current forecast shows, we would have the longest stretch on record on or before June 15th.

As we look at the longest 90F+ stretches on record (not limited to any date range) we are going to be nowhere near the 14 consecutive days observed back in July of 1936. However, we do look to get seven days in a row (last Friday through this Thursday), which would tie for the 15th longest stretch on record with seven days. If we can get a 90F+ high on Friday as well, this would tie for the ninth-longest overall stretch on record.

That forecast through Thursday would also put us tied for sixth place in most 90F+ degree highs that have occurred on or before June 15th at seven. Friday could make it fourth place if we can get up to 90F. Stats: Minnesota State Climatology Department


National Weather Forecast

A widespread area of at least isolated showers and storms is expected Monday from the Colorado Rockies eastward to the Atlantic Ocean. Some rain and higher elevation snow will also be possible in the Pacific Northwest.

Several record highs are expected to fall on Monday in the upper Midwest and in New England. Caribou, ME, could see their first 90F of the year as the high climbs to 91F, which would shatter the record for the day of 84F in 1991.

More heavy rain will impact areas of the Gulf Coast and lower Mississippi Valley over the next few days, with 2-4”+ possible. This could cause flooding issues, especially since this area has been hard hit over the past month with heavy rain.


Threat of flooding in coastal Louisiana and Texas after waterlogged spring

More from the Capital Weather Gang: “If you live along the western Gulf of Mexico coast, odds are that this spring had you ready to build an ark. Some parts of Texas and Louisiana have seen more than 2½ feet of rainfall since the start of April, and more is on the way. Another three to six inches of rain, and maybe more in spots, is set to target already waterlogged areas through early next week. Flash flood watches are in effect for much of the Louisiana coastline. In Texas, numerous rivers and streams have overtopped their banks due to recent rains, prompting flood warnings for waterways in the zone from around Victoria to Beaumont.

Ongoing fish kill on the Klamath River is an ‘absolute worst-case scenario’

More from High Country News: “The video shows clear river water washing over rocks as sunlight dances in the shallows. Small slivers of white that look like leaves float on the surface. But they aren’t leaves; they’re the bodies of juvenile salmon, most of them no longer than a finger, dead from a warm-water disease exacerbated by drought on the Klamath River. The caption to the video, filmed by Yurok Vice Chairman Frankie Joe Myers, is stark: “This is what climate change looks like when we don’t act.” Fish have been dying on the Klamath since around May 4, according to the Yurok Tribal Fisheries Department. At that time, 97% of the juvenile salmon caught by the department’s in-river trapping device were infected with the disease C. shasta, and were either dead, or would die within days. Over a two-week period, 70% of the juvenile salmon caught in the trap were dead.

Plant Competition during Climate Change

More from the University of Freiburg: “The researchers set up a field study in the Park Tapada Real in the small Portuguese town of Vila Viçosa. The focus was on how cork oak (Quercus suber) handles two stressors: the first being extreme drought; and the other, the invasive plant species gum rockrose (Cistus ladanifer). The study has great relevance because both stress factors are currently clearly on the increase. At the same time, there was a gap in research on the issue. Researchers have up to now rarely looked at how different, interacting stress factors influence ecosystems. The researchers were in part surprised by their findings. “The factors interacted more dynamically than we expected,” says Haberstroh, who did the investigative work for his doctoral thesis. During wet years, the interacting stressors didn’t cause any significant changes in the cork oak, while in dry conditions, the factors either amplified or buffered each other. One surprising result was also that cork oak, despite the double burden, was able to recover better than had been expected after extreme drought. The researchers observed that happens above all when the invasive gum rockrose shrubs were seriously compromised by the drought as well.


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– D.J. Kayser