Jefferson County - East-West Gateway Coordinating Council

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140 HAZARD ANALYSIS NARRATIVE Hazard: Severe Winter Weather Jefferson County – Section 2 Description of Hazard (Type of hazard, pathways/areas likely affected, type of damage, etc.) Severe winter weather is defined as sleet, freezing rain, and heavy snow. This can be accompanied by strong winds creating blizzard conditions, severe drifting and dangerous wind chill. Ice storms cause significant hazards as well. Communications and power can be disrupted for days, resulting in residents using alternate fuel sources that are likely to start fires. Strong winds with intense storms and cold fronts knock down trees, utility poles, power lines. Extreme cold often accompanies a winter storm in its wake. Winter weather can result in injuries, death, and property damage. Prolonged exposure to cold can cause frostbite, hypothermia can become life-threatening. The average pathway may vary in any direction, but the average winter storm moves from west to east. Winter storms are most likely to occur in November through February but may ensue from October through April. Any person or structure at any location could be damaged by a winter storm. Historical Statistics (Frequency, strength, # of lives lost, # of injuries, economic losses, etc.) Economic losses are difficult to measure. Local governments, home and business owners can be faced with spending millions of dollars for snow removal, restoration of services, debris removal and landfill hauling. NOAA weather indicates that the Missouri counties north of the Missouri River receive an average snowfall of 18-22 inches, and counties south of the river receive an average of 8-12 inches. Historical statistics for the EWGCC include the winter storm in January 1994 that resulted in temperatures dropping to –20 F degrees below zero, with wind chills to –50 degrees F below zero. In January 1977, the EWGCC region received the maximum snowfall for the area at 23.9 inches of snow with temperatures hovering around –14 degrees F below zero. Also in January 1982, the EWGCC region received a 24 maximum snowfall of 13.9 inches with temperatures around – 15 degrees F below zero. In February 1914, the EWGCC received the maximum snowfall for the area for this month at 23.5 inches of snow. In December 1973, the EWGCC region received its maximum snowfall for the area for this month at 26.3 inches. The coldest December on record was 1983 with temperature average of 20.5 degrees F. Multiple homes and businesses had water pipes break, people were admitted to hospitals for hypothermia/frostbite and schools were closed. Statement of Future Probable Severity (Catastrophic/Critical/Limited/Negligible). Ice storms could be limited to catastrophic Statement of Probable Risk (Likeliness of future occurrence-(Highly Likely/Likely/Possible/Unlikely) Winter/ice storms are likely to occur in the future. Statement of Next Disaster’s Likely Adverse Impact on the Community (Catastrophic/Critical/Limited/Negligible) Without Mitigation Measures: Life Property Emotional Financial
A Regional Overview All-Hazard Mitigation Plan 141 Comments: Critical Critical Critical Critical With Mitigation Measures: Life Property Emotional Financial Comments Limited Limited Limited Limited Recommendations: That the County Hazard Mitigation Planning Committee initiate a mitigation activity to convince county local governments, residents to help reduce the loss of life and property damage caused by winter storms by preparing for the storms and adhering to NOAA winter storm weather warnings.
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Jefferson County - East-West Gateway Coordinating Council

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