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2024 Hennepin County All -Jurisdiction Hazard Mitigation Plan <br />Volume 2 — Hazard Inventory <br />4.3.4.5. Geographic scope of hazard <br />1c <br />Minnesota is north and east of the <br />spatial hail frequency maximum within <br />the US, which stretches from <br />southwestern South Dakota, into <br />Nebraska, Kansas, Oklahoma, Colorado, <br />and Texas. <br />Within Minnesota, hail tends to be� <br />most common in the southern and <br />western portions of the state although 1 � <br />large and damaging hail has been <br />observed in every county. The map of Average number severe hail days, 2003-2012, from storm Prediction <br />all known 4" hail reports since 1955 <br />Center WCM Page. <br />does show a preference for western <br />and southern Minnesota, but also <br />shows a clustering of reports near the Twin Cities, where more people are available to observe and report <br />hail. <br />4.3.4.6. Chronologic patterns (seasons, cycles, rhythm) <br />Most years, Hennepin County sees at least one large hail <br />event. The seasonal hail threat coincides with the <br />thunderstorm season, generally from April through <br />September, with a notable peak in frequency in June <br />and July. Severe hail has been reported as early as <br />March in Hennepin County, and as early as February in <br />greater Minnesota. Hail was observed with <br />thunderstorms in the Twin Cities on December 16, <br />2015, though no damage was observed. Damaging hail <br />in Hennepin County has been reported in November <br />and has occurred several times during October. <br />Minnesota 4"+ Hall Deports, 1 -2014 <br />N VNR Srare Qunarc o gv Office <br />11 µl <br />a <br />d <br />1 <br />ire <br />4.0 <br />, <br />Flail Diameter <br />4im"b" <br />It <br />MNDNIR <br />4"+ hail reports in Minnesota, from DNR <br />State Climatology Office <br />m <br />