Grand Isle, LA Live Doppler Radar
Live radar for Grand Isle, Jefferson County: every NWS radar combined, rain, snow and ice colors, flash-flood risk, storm tracks and official warnings.
What weather hits Grand Isle?
Since 1996, the National Weather Service has logged damaging thunderstorm winds on 81 days in the Coastal Jefferson forecast zone and Jefferson County — the most common reported hazard around Grand Isle, mostly in April and May. Next come flash flooding (61 days) and lightning casualties & damage (16 days).
| Hazard | Days reported | Most recent | Worst on record |
|---|---|---|---|
| Damaging thunderstorm winds | 81 | Jul 2025 | Jan 17, 2004 · $350,000 damage |
| Flash flooding | 61 | Jun 2026 | Sep 11, 2024 · $40 million damage |
| Lightning casualties & damage | 16 | Jun 2022 | Jun 29, 2022 · 1 death |
| Flooding | 11 | Jul 2020 | Aug 8, 2001 · $5,000 damage |
| Storm surge | 3 | Oct 2001 | — |
Source: NOAA NCEI Storm Events Database, 1996–2026 (the latest year is partial). A "day" is a date with at least one report in the Coastal Jefferson forecast zone and Jefferson County; damage is as reported, not adjusted for inflation.
Which radars cover Grand Isle?
The closest NEXRAD Doppler radar is KLIX (New Orleans, LA), about 79 miles north. Radar beams climb as they travel, so the height of the lowest scan over town decides how low in a storm the radar can see.
| Radar | Distance | Lowest beam over Grand Isle | View |
|---|---|---|---|
| KLIX New Orleans, LA | 79 mi north | 6,700 ft | Fair — the beam can pass over shallow snow and low-level rotation |
| KHDC Hammond, LA | 93 mi north-northwest | 8,600 ft | Fair — the beam can pass over shallow snow and low-level rotation |
| KMOB Mobile, AL | 147 mi northeast | 17,700 ft | Limited — the beam overshoots the lowest part of storms |
Beam height is the center of the 0.5° scan above the radar, with standard refraction. Mountains near a radar can block it further.
Tornado & hail history near Grand Isle
Since 1950, NOAA has recorded 26 tornadoes within 25 miles of Grand Isle, 2 of them EF2/F2 or stronger. Most came in May and April. The strongest was an F2 on April 8, 1993, which passed about 2 miles north-northwest of town and caused 3 deaths. The most recent was an EF0 on June 26, 2025, which touched down about 12 miles west of town.
Hail: 10 reports of 1-inch or larger hail within 25 miles since 1955, 1 of them 2 inches or more; the largest was 2.00-inch hail on June 15, 1955.
Source: NOAA Storm Prediction Center — tornadoes 1950–2025, hail 1955–2025. Distances are to each tornado's track; ratings before February 2007 use the original Fujita scale.
On TALON you get Grand Isle's live radar loop, rain/snow/ice colors, flash-flood risk, storm tracks with arrival times and NWS warnings free; close-up radar and rotation detection are part of TALON Pro.
Grand Isle radar FAQ
Where is the nearest weather radar to Grand Isle, LA?
KLIX (New Orleans, LA), about 79 miles north. KHDC (Hammond, LA) is 93 miles away and also covers the area.
Can radar see a tornado near Grand Isle?
Radar can't see the tornado itself, but it shows the rotating storm and, once debris is lofted, a debris signature. Over Grand Isle the lowest scan from KLIX is about 6,700 ft up — fair — the beam can pass over shallow snow and low-level rotation.
Is TALON's radar for Grand Isle free?
Yes — the US radar loop, rain/snow/ice colors, flash-flood risk, storm tracks and NWS warnings are free in any browser. Close-up radar, rotation detection and longer forecasts are part of TALON Pro.
Should I rely on radar for my safety?
No app replaces official warnings. When the National Weather Service issues a warning for Grand Isle, follow it right away — see watch vs. warning.
Radar for nearby towns
- Golden Meadow, LA radar 19 mi
- Jean Lafitte, LA radar 38 mi
- Lockport, LA radar 42 mi
- Houma, LA radar 48 mi
- Gretna, LA radar 48 mi
- Westwego, LA radar 48 mi
- Harahan, LA radar 51 mi
- Kenner, LA radar 57 mi
- New Orleans, LA radar 58 mi
- Thibodaux, LA radar 62 mi