Agenda - Council - 12/10/2019 - Laserfiche WebLink

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Anoka County MINNESOTA Respectful, Innovative, Fiscally Responsible Two Tornados were confirmed in Anoka County in 2017 Anoka County 2019 Multi -Jurisdictional All Hazards Mitigation Plan Due to climate and geographic location the likely occurrence of tornados can be a frequent occurrence for the City of Blaine. With Blaine's rate of growth and construction practices loss impact from future tornados would be more significant than what has been seen historically. Although tornadoes have affected Anoka County infrequently in the past, probability of damage from this hazard in the future is likely. The entire county is at equal risk of future occurrences. While higher population and housing densities in the municipalities set the stage for increased impact, the potential for property damage and loss of live is equally high for the unincorporated areas of the county due to the large number of mobile homes throughout the rural areas. A detailed list of Tornado incidents is in Appendix A. 4.3.1.5 Severe Weather— Winter Storms Winter storms include heavy snow, blizzards and extreme cold. Winter storms in Minnesota often include extreme cold and ice. These storms are especially hazardous in terms of closing emergency routes, creating power and utility system failures, and immobilizing economic activity. In Minnesota, a heavy snow event is defined by six or more inches of snow in a 12-hour period and eight or more inches of snow in a 24-hour period. Snow is considered heavy when visibilities drop below one -quarter mile regardless of wind speed. Blizzards are the most violent of the winter storms and are characterized by low temperatures, usually below 20° Fahrenheit, accompanied by strong winds in excess of 35 miles per hour with enough snow in the air caused by either falling or blowing snow to create visibilities of one -quarter mile or less for an extended period of time, usually at least three hours or more. While blizzards can occur in Anoka County from October through April, they most commonly occur from November through the end of March. NOrmal Snowfall Annual (1981-2010) 95 80 75 TO 65 60 55 50 45 40 •35 30 cares Stale Chs-naiology Office - saNDNR Normal annual snowfall in Minnesota. Snowfall is greatest in the northeastern part of the state. Source:State Climatology Office, Minnesota Department of Natural Resources - Division of Ecological and Water Resources 99 Commented [RK117]: Commented [RK118]: none available httpsl/www.dnr.state.mn. ons/snow.html Search for more recent image — us/climate/summaries and publicati Commented [RK115]: 03/22/19 Updated mean annual snowfall