The most recent reported hail day was 2024-06-01 -- 2 years ago, with nothing reported since. St. Tammany Parish is hit in most years. The largest stone on record here is 2 inches, a hen egg and twice the National Weather Service's 1 inch severe criterion, reported on 2017-02-07 near Bush.
Colored swath = NOAA MRMS radar-estimated hail size; dots = NOAA SPC reports in Louisiana. Radar-indicated, not a guarantee of damage.
The last hail here fell on 2024-06-01, around Covington. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls St. Tammany Parish addresses inside a hail swath above your size threshold into a door-knock list you can export, scoped to your approved markets.
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See call-center options ->NOAA's Storm Prediction Center has logged 21 separate hail days here since 2010 -- 1.2 a year over 17 years of record. They carry 36 reports in total: most hail days here are logged from a single spot. 5 of those 17 years produced none at all. The busiest single year was 2022, with 3 hail days. The last five years track the long-run rate, with 6 days since 2022.
Most hail here stays under 2 inches: only 1 of the 21 days on record passed it, 5%, the last on 2017-02-07. Those big days do not follow the county's usual calendar: most of them fall in February, not June. 8 of the 21 days reached golf-ball size, 1.75 inches or bigger.
Across the whole of Louisiana, see the Louisiana hail map and history.
Reports cluster nearest Slidell -- 6 of the parish's 21 hail days -- then Lacombe (4), Bush (3), Covington (3) and Pearl River (3). Beyond those, NOAA names Mandeville and Slidell Airport on more than one hail day apiece.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| Slidell | 5 | 1.25″ |
| Lacombe | 2 | 1.75″ |
| Pearl River | 2 | 1.75″ |
| 7 W Bush | 1 | 2.00″ |
| 1 E Pearl River | 1 | 1.75″ |
The season runs January through June: 17 of the 21 hail days on record fall in those 6 months (81%). June is the single busiest month, with 5 of them (24%). That peak closes the window: the season builds all the way to its worst month and then stops. Hail has also been reported in July, August, October and December, outside that window. September and November are the only months that have never produced a reported hail day.
| Month | Hail days |
|---|---|
| January | 1 |
| February | 2 |
| March | 3 |
| April | 3 |
| May | 3 |
| June | 5 |
| July | 1 |
| August | 1 |
| October | 1 |
| December | 1 |
That day put 1 report on the map, the biggest 1 inch near Covington. No hail day has been reported here yet this year.
| Date | Max hail | Reports |
|---|---|---|
| 2024-06-01 | 1.00″ | 1 |
| 2024-01-08 | 1.00″ | 2 |
| 2023-08-27 | 1.75″ | 3 |
| 2022-06-09 | 1.25″ | 2 |
| 2022-05-17 | 1.00″ | 1 |
| 2022-04-12 | 1.00″ | 1 |
| 2021-06-13 | 1.00″ | 2 |
| 2018-03-11 | 1.00″ | 1 |
The colored swath is NOAA's MRMS radar estimate of the largest hail per ~1 km cell; the dots are SPC ground reports. Yellow is about an inch, red 1.5 to 2″, purple 2″ and up (hail size vs roof damage). On this county's worst day the reports reached 2 inches, which is the purple band. Look up a street address with the hail history by address tool.
The nearest parishes and counties with a page of their own, over the state line included: Jefferson Parish (17 hail days), Tangipahoa Parish (20), Livingston Parish (20), Pearl River County, Mississippi (16) and Harrison County, Mississippi (17). St. Tammany Parish takes more hail than any of them.
Jefferson Parish · Tangipahoa Parish · Livingston Parish · Pearl River County, Mississippi · Harrison County, Mississippi
Back to the Louisiana hail map or the U.S. hail map.
Data & method: NOAA/NWS Storm Prediction Center reports + NOAA MRMS MESH radar, St. Tammany Parish, Louisiana only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.