St. Mary Parish weather alerts
There are no active weather alerts for St. Mary Parish, LA right now.
Since 2016 the National Weather Service has issued about 1,101 alerts that included St. Mary Parish, roughly 110 a year. The most common is the dense fog advisory (231 from 2016 to 2025). The last tornado warning was issued on June 18, 2026. 24 tornadoes have touched down in the county since 1950.
Updated from the National Weather Service · lists refresh hourly; the live map loads current alerts directly from the NWS
No warnings, watches or advisories include St. Mary Parish at the moment. This page updates automatically when the National Weather Service issues one. Check neighboring Iberia Parish, Assumption Parish, Terrebonne Parish, St. Martin Parish.
St. Mary Parish alert history
Alert events that included St. Mary Parish or its forecast zones, from the NWS warning archive.
| Alert type | 2016–2025 | 2026 | Last issued |
|---|---|---|---|
| Dense Fog Advisory | 231 | 24 | November 1, 2026 |
| Wind Advisory | 173 | 11 | October 16, 2026 |
| Heat Advisory | 119 | 20 | September 7, 2026 |
| Severe Thunderstorm Warning | 99 | 7 | August 26, 2026 |
| Coastal Flood Advisory | 75 | 8 | November 3, 2026 |
| Tornado Watch | 54 | 3 | June 18, 2026 |
| Flood Watch | 51 | 2 | June 15, 2026 |
| Flash Flood Warning | 50 | 5 | June 15, 2026 |
| Flood Warning | 35 | 0 | April 26, 2025 |
| Flood Advisory | 35 | 0 | August 15, 2019 |
| Extreme Heat Warning | 28 | 2 | August 21, 2026 |
| Cold Weather Advisory | 19 | 2 | January 31, 2026 |
| Severe Thunderstorm Watch | 16 | 0 | March 31, 2025 |
| Tornado Warning | 16 | 1 | June 18, 2026 |
| Freeze Warning | 15 | 1 | February 1, 2026 |
| Red Flag Warning | 14 | 5 | October 17, 2026 |
| Tropical Storm Warning | 12 | 2 | July 22, 2026 |
| Coastal Flood Warning | 9 | 2 | July 23, 2026 |
| Storm Surge Warning | 7 | 0 | September 9, 2024 |
| Hurricane Watch | 6 | 0 | September 9, 2024 |
| Fire Weather Watch | 6 | 3 | October 17, 2026 |
| Extreme Heat Watch | 6 | 0 | August 14, 2023 |
| Freeze Watch | 5 | 1 | February 1, 2026 |
| Tropical Storm Watch | 4 | 2 | July 21, 2026 |
| Hurricane Warning | 4 | 0 | September 9, 2024 |
| High Wind Warning | 3 | 0 | March 4, 2025 |
| Winter Weather Advisory | 2 | 0 | January 15, 2024 |
| Winter Storm Warning | 2 | 0 | January 21, 2025 |
| Frost Advisory | 1 | 0 | November 1, 2019 |
| Extreme Cold Watch | 1 | 2 | January 26, 2026 |
| Extreme Cold Warning | 1 | 1 | January 26, 2026 |
| High Wind Watch | 1 | 0 | March 4, 2025 |
| Winter Storm Watch | 1 | 0 | January 21, 2025 |
Tornado history in St. Mary Parish
24 tornadoes have been recorded in St. Mary Parish since 1950, injuring 26 people. That ranks 52 of 64 counties in Louisiana. The most recent was on April 14, 2018 (rated EF0).
Strongest tornadoes in St. Mary Parish
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| March 17, 1970 | F3 | St. Mary Parish | 1 mi | 50 yd | 0 | 2 |
| April 4, 1952 | F2 | St. Mary Parish | 6.4 mi | 20 yd | 0 | 3 |
| September 10, 1961 | F2 | St. Mary Parish | 1 mi | 100 yd | 0 | 16 |
| September 16, 1971 | F2 | St. Mary Parish | 0.5 mi | 50 yd | 0 | 0 |
| February 23, 2016 | EF1 | St. Mary Parish | 2.6 mi | 50 yd | 0 | 0 |
Most recent tornadoes
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| April 14, 2018 | EF0 | St. Mary Parish | 0.3 mi | 40 yd | 0 | 0 |
| July 19, 2017 | EF0 | St. Mary Parish | 0.7 mi | 10 yd | 0 | 0 |
| June 13, 2016 | EF0 | St. Mary Parish | 0 mi | 5 yd | 0 | 0 |
| February 23, 2016 | EF1 | St. Mary Parish | 2.6 mi | 50 yd | 0 | 0 |
| March 21, 2012 | EF0 | St. Mary Parish | 0.7 mi | 20 yd | 0 | 0 |
About St. Mary Parish
- Population: 46,799 (2024 estimate)
- State: Louisiana
- NOAA Weather Radio SAME code: 022101 (how to use it)