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2025 Hazard Mitigation Plan <br />Kittitas County, Washington <br />. The probability of occurrence for strong winds/damaging winds in Kittitas County is high because <br />significant occurrences of this hazard occur annually throughout the County. <br />o The probability of occurrence for thunderstorms, cold wave/extreme cold, and heat wave/extreme <br />heat is medium because significant occurrences of these hazards have occasionally impacted <br />the County and will likely occur again within 25 years. <br />o The probability of occurrence for hail and tornadoes is low because a significant occurrence of <br />these hazards is likely to occur within 100 years. <br />The hail annualized frequency value represents the average number of recorded hail hazard <br />occurrences, in event days, per year over the period of record (34 years). Table 4-104 outlines the <br />annualized frequency for hail, based on FEMA NRI data, for Kittitas County. <br />Table 4-104. HailAnnualized Frequency (FEMA National Risk lndex) <br />The strong wind annualized frequency value represents the average number of recorded strong wind <br />hazard occurrences, in event days, per year over the period of record (34 years). Table 4-105 outlines <br />the annualized frequency for strong winds, based on FEMA NRI data, for Kittitas County. <br />Table 4-105. Strong Wind Annualized Frequency (FEMA National Risk Index) <br />The tornado annualized frequency value represents the average number of recorded tornado hazard <br />occurrences, in event days, per year over the period of record (72 years). Table 4-106 outlines the <br />annualized frequency for tornadoes, based on FEMA NRI data, for Kittitas County. <br />Table 4-106. Tornado Annualized Frequency (FEMA National Risk lndex) <br />The heat wave annualized frequency value represents the average number of recorded heat wave hazard <br />occurrences in event days, per year over the period of record (16 years). Table 4-107 outlines the <br />annualized frequency for heat waves, based on FEMA NRI data, for Kittitas County. <br />Table 4-107. Heat Wave Annualized Frequency (FEMA National Risk Index) <br />3 0.1 events per yearKittitas County <br />Annualized frequency is defined as the expected frequency or probability of a hazard occurrence per year, <br />Location Annualized FrequencyEvents on Record <br />986 - 2021 <br />3 0.1 events per yearKittitas County <br />Annualized frequency is defined as the expected frequency or probability of a hazard occurrence per year, <br />Location Annualized FrequencyEvents on Record <br />986 - 2021 <br />0 0.1 events per yearKittitas County <br />Annualized frequency is defined as the expected frequency or probability of a hazard occurrence per year <br />Annualized FrequencyLocationEvents on Record <br />950 - 2021) <br />15 0.9 events per yearKittitas County <br />Annualized frequency is defined as the expected frequency or probability of a hazard occurrence per year <br />Annualized FrequencyLocationEvents on Record <br />- 2021 <br />Chapter 4: Hazard ldentification and Risk Assessment 163