Harrison County, Mississippi Hail Map & History
Harrison County was hit as recently as 2026-08-21, 24 days ago. Harrison County is hit in about half the years on record. 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 2022-05-15 near Lyman.
Colored swath = NOAA MRMS radar-estimated hail size; dots = NOAA SPC reports in Mississippi. Radar-indicated, not a guarantee of damage.
The last hail here fell on 2026-08-21, around Lyman. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Harrison County 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 ->How often it hails in Harrison County
NOAA's Storm Prediction Center has logged 18 separate hail days here since 2010 -- 1.1 a year over 17 years of record. Those days carry 39 separate reports between them, two or three on a typical one. 7 of those 17 years produced none at all. One year dominates the record: 2023 alone produced 5 of the 18 days. The last five years have run hotter than the long-run rate: 10 days since 2022, against 0.7 a year before that.
Most hail here stays under 2 inches: only 1 of the 18 days on record passed it, 6%, the last on 2022-05-15. Those big days do not follow the county's usual calendar: most of them fall in May, not June. Golf-ball size is rarer still: 1.75 inches or more on 3 of the 18 days.
Across the whole of Mississippi, see the Mississippi hail map and history.
Hardest-hit places in Harrison County
Reports cluster nearest Lyman -- 5 of the county's 18 hail days -- then Gulfport (5), Biloxi (3), Saucier (3) and Diamondhead (2). Beyond those, NOAA names Pass Christian on more than one hail day apiece.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| 4 ESE Lyman | 2 | 1.25″ |
| Pass Christian | 2 | 1.25″ |
| Gulfport | 2 | 1.00″ |
| 5 Ese Lyman | 1 | 2.00″ |
| 4 Se Lyman | 1 | 1.75″ |
When it hails in Harrison County
The season runs January through June: 15 of the 18 hail days on record fall in those 6 months (83%). June is the single busiest month, with 5 of them (28%). That peak closes the window: the season builds all the way to its worst month and then stops. Hail has also been reported in August and September, outside that window. Reports span 8 of the 12 calendar months; the other 4 have never produced one.
| Month | Hail days |
|---|---|
| January | 1 |
| February | 1 |
| March | 1 |
| April | 4 |
| May | 3 |
| June | 5 |
| August | 1 |
| September | 2 |
Recent Harrison County hail days
That day put 2 reports on the map, the biggest 1.25 inches near Lyman. 1 hail day has already been reported this year.
| Date | Max hail | Reports |
|---|---|---|
| 2026-08-21 | 1.25″ | 2 |
| 2024-04-10 | 1.75″ | 4 |
| 2024-01-08 | 1.25″ | 1 |
| 2023-09-07 | 1.00″ | 1 |
| 2023-06-20 | 1.25″ | 1 |
| 2023-06-19 | 1.00″ | 1 |
| 2023-06-08 | 1.25″ | 1 |
| 2023-03-12 | 1.50″ | 2 |
How to read the Harrison County map
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.
Nearby counties
The nearest counties and parishes with a page of their own, over the state line included: Jackson County (19 hail days), Pearl River County (16), Forrest County (27) and St. Tammany Parish, Louisiana (21). Harrison County sits in between.
Jackson County · Pearl River County · Forrest County · St. Tammany Parish, Louisiana
Back to the Mississippi hail map or the U.S. hail map.
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Data & method: NOAA/NWS Storm Prediction Center reports + NOAA MRMS MESH radar, Harrison County, Mississippi only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.