St. Tammany storm history
Storm events recorded in St. Tammany, Louisiana between 1950 and 2025.
761
Total events
66
Tornadoes
98
Hail
154
Floods
8
Deaths
$5.7B
Property damage
Most significant events
Strongest tornadoes, deadliest events, and biggest damage in this county. Up to 50 shown.
Damage began at Birtrue Road east of Louisiana Highway 40. The tornado then continued eastward producing EF2 damage to homes on Birtue and Thornhill Roads. EF3 damage was observed near the intersection of Jenkins Cemetery Road and Louisiana Highway 40. Two homes had extensive dam…
A 36 year old man was struck and killed by lightning at a construction site in Slidell.
Numerous trees and power lines along Tyler Street and nearby parallel streets between 19th Avenue and 23rd Avenue were knocked down by thunderstorm winds. Two vehicles and one residence were damaged by the falling trees. In one of the vehicles crushed by falling trees, one of the…
Sheriff's Office reported a driver was killed when a tree fell on the truck he was driving.
Lightning struck near a large group of people gathered for a four-wheel vehicle event north of Covington. Firefighters evaluated at least a dozen people who had minor injuries, and three people were taken to the hospital.
Heavy rain of 5-7' also fell across the parish with locally higher amounts. Much of this rain fell over the course of just a few hours, resulting in significant flash flooding, especially from Covington through Slidell. Numerous roads became impassable and several homes were floo…
Zeta produced tropical storm force winds and likely some hurricane force wind gusts which led to widespread damage to trees, power lines and some power poles across the parish. At the peak, roughly 60 percent of the parish was without power.
Estimated wind gusts between 40 and 50 mph across the city of Slidell. Minor sporadic damage reported via social media and NWS employee. Time estimated from radar.
Six to twelve inches of rainfall, most of which fell in one day, led to major flooding along the Tchefuncte River in St. Tammany Parish. Approximately 100 homes and businesses suffered varying degrees of damage due to the flooding and numerous roads, including Hwy 21 were closed …
Widespread heavy rainfall of 6 to 12 inches across northwest St Tammany Parish during the overnight and morning hours resulted in widespread flash flooding. Numerous roads were flooded during the night in the affected areas. High water rescues were conducted at a number of locati…
Storm surge flooding of 4 to 6 feet above normal on Lake Pontchartrain caused flooding of low lying areas including roadways and some structures in the southern part of the parish. Early estimates were that about 200 structures flooded from Slidell to the Madisonville area.
Severe flooding developing primarily in the southeast portion of St. Tammany Parish. Numerous streets were impassable. Parish officials estimate that over 1000 houses were flooded, primarily in the Slidell area.
Thunderstorm Wind Thunderstorm Wind
Large tree branches were broken and small tree was uprooted by thunderstorm winds.
Thunderstorm Wind Thunderstorm Wind
Powerline down near the intersection of Reiley Rd and West Dubuission Rd.
Thunderstorm Wind Thunderstorm Wind
Public call of limbs up to 2 inches broken along with power outages in the Woodridge neighborhood in Mandeville.
Thunderstorm Wind Thunderstorm Wind
Law enforcement reported a tree down on Fish Hatchery road near Lacombe.
Thunderstorm Wind Thunderstorm Wind
Public reported trees down near Sams Club and Rooms 2 Go in Covington.
Lightning Lightning
St. Tammany Fire Department responded to a house fire on Sunset Drive in Slidell. No injuries.
Thunderstorm Wind Thunderstorm Wind
Multiple trees and a few powerlines were downed by thunderstorms in Madisonville.
Thunderstorm Wind Thunderstorm Wind
The I-12 exit sign for LA Highway 434 Lacombe was blown over by thunderstorm winds.
Tornado EF1 Tornado
A waterspout moved onshore near Madisonville causing damage to marsh grass south of Hwy 22 which is visible in high resolution satellite data. The first damage point observed on the in-person survey was on LA Hwy 22 where several branches were snapped just west of Fairview-Rivers…
Thunderstorm Wind Thunderstorm Wind
Public comment on broadcast media social media post that siding was blown off a home.
Thunderstorm Wind Thunderstorm Wind
Thunderstorm winds downed a tree causing additional damage to power pole near intersection of Foy and Dupard.
Thunderstorm Wind Thunderstorm Wind
Thunderstorm wind gusts in Mandeville estimated between 60 and 70 mph.
Thunderstorm Wind Thunderstorm Wind
Large tree branches down on Oak Grove Way in Slidell.
Thunderstorm Wind Thunderstorm Wind
Parish dispatch reported highway sign down at Davidson Rd and Hwy 1078. Time estimated by radar.
Thunderstorm Wind Thunderstorm Wind
Measured 63mph wind gust and shingles knocked off gazebo from thunderstorm winds. Time estimated from radar.
Thunderstorm Wind Thunderstorm Wind
Parish dispatch reported trees down at Sunshine Ave and North Harrison St. Time estimated by radar.
Thunderstorm Wind Thunderstorm Wind
Pine tree snapped along Hiern Drive in Mandeville from thunderstorm winds. Time estimated from radar.
Thunderstorm Wind Thunderstorm Wind
Parish dispatch reported downed power lines on Pontchartrain Drive near Eden Isle. Time estimated by radar.
Tornado EF1 Tornado
EF-1 tornado with winds of 90 mph and a maximum width of 50 yards touched down at the intersection of Transmitter Rd. and Clesi Ave. where a few small softwood pine trees were snapped. The tornado travelled to the east on the south side of Clesi Ave. and directly impacted a singl…
Thunderstorm Wind Thunderstorm Wind
Tree on powerline at Hwy 190 near Powell Drive in Lacombe.
Tornado EF0 Tornado
Tornado touched down near the intersection of W Moran Rd and John Keller Dr causing half of a water oak to snap. It moved northeastward causing sporadic tree damage and also caused minor roof damage on the east-facing side of a home on Hwy 41 before lifting near the intersection …
Flash Flood Flash Flood
Significant street flooding reported in the vicinity of Slidell High School.
Flash Flood Flash Flood
Significant street flooding reported along Gause Blvd near Office Depot.
Flash Flood Flash Flood
At least six cars stalled in high water on Independence Dr.
Flash Flood Flash Flood
Audubon impassable due to high water near Robert.
Events by year
| Year | Events | Tornadoes |
|---|---|---|
| 2025 | 18 | 1 |
| 2024 | 75 | 6 |
| 2023 | 24 | 0 |
| 2022 | 17 | 4 |
| 2021 | 43 | 5 |
| 2020 | 23 | 2 |
| 2019 | 9 | 0 |
| 2018 | 11 | 1 |
| 2017 | 24 | 5 |
| 2016 | 24 | 2 |
| 2015 | 11 | 0 |
| 2014 | 15 | 0 |
| 2013 | 14 | 1 |
| 2012 | 20 | 2 |
| 2011 | 33 | 4 |
| 2010 | 11 | 0 |
| 2009 | 14 | 2 |
| 2008 | 28 | 3 |
| 2007 | 11 | 0 |
| 2006 | 15 | 0 |
| 2005 | 12 | 0 |
| 2004 | 21 | 1 |
| 2003 | 14 | 0 |
| 2002 | 26 | 3 |
| 2001 | 20 | 0 |
| 2000 | 27 | 4 |
| 1999 | 10 | 0 |
| 1998 | 26 | 1 |
| 1997 | 11 | 0 |
| 1996 | 23 | 1 |
| 1995 | 23 | 2 |
| 1994 | 4 | 0 |
| 1993 | 6 | 0 |
| 1992 | 6 | 2 |
| 1991 | 8 | 0 |
| 1990 | 11 | 0 |
| 1989 | 4 | 0 |
| 1988 | 11 | 3 |
| 1987 | 10 | 1 |
| 1986 | 3 | 0 |
| 1985 | 10 | 1 |
| 1984 | 4 | 0 |
| 1983 | 5 | 1 |
| 1982 | 2 | 1 |
| 1980 | 3 | 1 |
| 1979 | 2 | 0 |
| 1978 | 2 | 0 |
| 1976 | 1 | 0 |
| 1975 | 2 | 0 |
| 1974 | 4 | 2 |
| 1973 | 1 | 0 |
| 1970 | 2 | 1 |
| 1969 | 1 | 0 |
| 1968 | 2 | 0 |
| 1964 | 1 | 1 |
| 1961 | 1 | 1 |
| 1957 | 2 | 1 |