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2024 Hennepin County All -Jurisdiction Hazard Mitigation Plan <br />Volume 2 — Hazard Inventory <br />Difference in Number of Days <br />j (Ir, 0 1.1 1.5 <br />Snowfall extremes should continue to increase as well, although the warming of winter in general and the <br />effect of increased winter rains should eventually begin decreasing seasonal snowfall. However, even the <br />most aggressively warm model scenarios show that snow will be a major if not dominant winter <br />precipitation through much of the century. <br />Severe convective storms and tornadoes are unlikely to remain at the current low incidence rates, and a <br />"rebound" appears likely within the next decade, based on historical frequency alone. The association <br />between this rebound and climate change will remain unclear, however. It is increasingly clear that severe <br />convective storms will have expanded seasonal and geographic ranges. It is possible, based on new <br />research, that extreme straight-line thunderstorm winds will be larger and/or more intense as the climate <br />continues warming. <br />Humid heat waves have already begun increasing in response to greater available humidity. Projections <br />indicate that summer temperatures are likely to increase significantly in Minnesota as well during the 21st <br />century. It remains unclear when these trends would begin, given a lack of any recent trends toward <br />increasing summertime high temperatures. However, projections indicate that by mid-century, the Twin <br />Cities should expect 5-10 additional days per year above 95' F, which would more than double current <br />frequencies (GRAPHIC 4.3.1K) <br />59 <br />