St. Tammany Parish, LA Tornado Risk & Storm Shelter Cost
St. Tammany Parish's tornado history, by the numbers
Since 1957, NOAA has logged 72 tornado tracks crossing St. Tammany Parish - one about every 1.1 years, which lands it in our High band. Nationally, St. Tammany Parish ranks at the 95th percentile for tornado frequency. Among 64 Louisiana counties in this dataset, St. Tammany Parish ranks 6 for how often a tornado touches down.
St. Tammany Parish's EF4-5 history
St. Tammany Parish's record has no EF4-5 tornado - its 72 tracks split 63 weak and 9 significant. That does not rule one out in the future, only that none has been recorded since 1950.
What a storm shelter costs near St. Tammany Parish
For a St. Tammany Parish homeowner, budget $2,890-$13,280 for a shelter or safe room ($7,645 typical) - this pass found no Louisiana-specific rebate on top of FEMA's underlying 75% national cost-share program.
The outage nobody plans for
Tornado outbreaks routinely knock out power across Louisiana for days, separately from any single house getting hit. A portable battery bank keeps a fridge, phone chargers and a radio running through that gap - cheaper and faster to set up than a generator.
Check your coverage, not just your risk
Because Louisiana allows wind/hail exclusions on standard homeowners policies, a St. Tammany Parish homeowner should confirm tornado wind damage is actually covered, not assume it - a separate endorsement is common here.
Read this before you rely on it
This is a county-level figure, not a per-address probability. St. Tammany Parish covers about 845 square miles, so a single touch here counts the same as a single touch in a county a fraction of that size. Pre-radar-era records (before the 1990s) are also documented by NOAA as undercounting weaker tornadoes in sparsely-instrumented areas. St. Tammany Parish has about 277,615 residents.