NHC HURDAT2 · SPC Tornado Database
Hurricanes and Tornadoes That Hit Geismar, LA
Every tropical system within 75 miles since 1851 and every tornado within 25 miles since 1950.
Data: NOAA NHC HURDAT2 and NOAA SPC tornado and hail reports, through 2025 · Updated
64 tropical systems have passed within 75 miles of Geismar, Louisiana since 1851, 19 of them at hurricane strength; the most recent was Francine in 2024. Since 1950, 118 tornadoes have touched down within 25 miles, 6 of them rated EF3 or stronger.
- Hurricanes
- 19
- Tropical storms
- 45
- Tornadoes
- 118
- EF3 or stronger
- 6
within 75 mi, since 1851
below hurricane strength
within 25 mi, since 1950
7 deaths in all
What the records show for Geismar
The strongest storm to pass near Geismar was Carmen in 1974, a Category 3 hurricane with 115 mph winds when its centre passed 63 miles away. The closest pass by a hurricane was an unnamed storm in 1947, whose centre came within 2 miles. The record near Geismar begins with an unnamed storm in 1856; the most recent system was Francine in 2024, a tropical storm 27 miles away. The 1930s and the 2000s were the busiest decades, with 6 systems each. Of the 64 systems, 14 have come since 2000. Geismar has more hurricanes within 75 miles than 66% of the 245 Louisiana cities on this site. The highest rating among the 118 tornadoes within 25 miles is F3 or EF3, reached 6 times; the most recent, on February 23, 2016, came within 12 miles. The deadliest, an EF2 on February 23, 2016, killed 2 people. Of the 118, 3 had paths within 5 miles of the city centre, and 61 have come since 2000. April and June have had the most tornadoes, 18 each. The most recent tornado was on October 26, 2025. Of the 245 Louisiana cities, 58% have more tornadoes within 25 miles than Geismar. Hail has been reported within 10 miles 52 times since 1956, with stones up to 3 inches (tea cup size). Geismar has more hail reports within 10 miles than 59% of the 245 Louisiana cities.
Compare Geismar's storm record with another city →
Tropical storms and hurricanes near Geismar
| Year | Storm | Closest | Strength when closest | Peak |
|---|---|---|---|---|
| 2024 | FrancineSep 12 | 27 mi | Tropical storm (67 mph) | Category 2 |
| 2021 | IdaAug 30 | 19 mi | Category 2 (97 mph) | Category 4 |
| 2021 | ClaudetteJun 19 | 39 mi | Tropical storm (44 mph) | Tropical storm |
| 2020 | ZetaOct 28 | 57 mi | Category 2 (105 mph) | Category 3 |
| 2020 | CristobalJun 8 | 36 mi | Tropical storm (41 mph) | Tropical storm |
| 2019 | OlgaOct 26 | 22 mi | Tropical storm (52 mph) | Tropical storm |
| 2012 | IsaacAug 30 | 9 mi | Tropical storm (63 mph) | Category 1 |
| 2011 | LeeSep 5 | 17 mi | Tropical storm (41 mph) | Tropical storm |
| 2008 | GustavSep 1 | 36 mi | Category 2 (96 mph) | Category 4 |
| 2005 | CindyJul 6 | 74 mi | Tropical storm (58 mph) | Category 1 |
| 2004 | MatthewOct 10 | 70 mi | Tropical storm (40 mph) | Tropical storm |
| 2003 | BillJun 30 | 31 mi | Tropical storm (54 mph) | Tropical storm |
| 2002 | IsidoreSep 26 | 67 mi | Tropical storm (62 mph) | Category 3 |
| 2001 | AllisonJun 11 | 34 mi | Tropical storm (40 mph) | Tropical storm |
| 1998 | HermineSep 20 | 70 mi | Tropical storm (40 mph) | Tropical storm |
| 1992 | AndrewAug 26 | 40 mi | Category 1 (84 mph) | Category 5 |
| 1988 | FlorenceSep 10 | 36 mi | Tropical storm (39 mph) | Category 1 |
| 1988 | BerylAug 9 | 5 mi | Tropical storm (44 mph) | Tropical storm |
| 1985 | JuanOct 29 | 39 mi | Tropical storm (72 mph) | Category 1 |
| 1985 | ElenaSep 2 | 65 mi | Tropical storm (69 mph) | Category 3 |
| 1979 | BobJul 11 | 38 mi | Tropical storm (60 mph) | Category 1 |
| 1977 | BabeSep 5 | 45 mi | Tropical storm (62 mph) | Category 1 |
| 1974 | CarmenSep 8 | 63 mi | Category 3 (115 mph) | Category 4 |
| 1971 | EdithSep 16 | 39 mi | Tropical storm (72 mph) | Category 4 |
| 1965 | BetsySep 10 | 9 mi | Category 1 (93 mph) | Category 4 |
| 1964 | HildaOct 4 | 9 mi | Category 1 (77 mph) | Category 4 |
| 1959 | ArleneMay 31 | 26 mi | Tropical storm (48 mph) | Tropical storm |
| 1957 | EstherSep 18 | 16 mi | Tropical storm (59 mph) | Tropical storm |
| 1956 | Unnamed 1956 stormJun 13 | 24 mi | Tropical storm (48 mph) | Tropical storm |
| 1955 | Unnamed 1955 stormAug 27 | 4 mi | Tropical storm (47 mph) | Tropical storm |
| 1955 | BrendaAug 2 | 40 mi | Tropical storm (43 mph) | Tropical storm |
| 1949 | Unnamed 1949 stormSep 4 | 13 mi | Tropical storm (47 mph) | Tropical storm |
| 1948 | Unnamed 1948 stormSep 4 | 63 mi | Tropical storm (71 mph) | Category 1 |
| 1947 | Unnamed 1947 stormSep 19 | 2 mi | Category 1 (87 mph) | Category 4 |
| 1947 | Unnamed 1947 stormAug 22 | 57 mi | Tropical storm (40 mph) | Category 1 |
| 1937 | Unnamed 1937 stormOct 3 | 66 mi | Tropical storm (40 mph) | Tropical storm |
| 1936 | Unnamed 1936 stormJul 27 | 48 mi | Tropical storm (41 mph) | Tropical storm |
| 1934 | Unnamed 1934 stormJun 16 | 30 mi | Category 1 (83 mph) | Category 2 |
| 1932 | Unnamed 1932 stormOct 15 | 46 mi | Tropical storm (58 mph) | Tropical storm |
| 1932 | Unnamed 1932 stormSep 19 | 42 mi | Tropical storm (54 mph) | Tropical storm |
| 1931 | Unnamed 1931 stormJul 15 | 14 mi | Tropical storm (47 mph) | Tropical storm |
| 1926 | Unnamed 1926 stormSep 22 | 23 mi | Tropical storm (41 mph) | Category 4 |
| 1926 | Unnamed 1926 stormAug 26 | 9 mi | Tropical storm (72 mph) | Category 3 |
| 1923 | Unnamed 1923 stormOct 16 | overhead | Tropical storm (70 mph) | Category 1 |
| 1920 | Unnamed 1920 stormSep 22 | 23 mi | Category 1 (78 mph) | Category 2 |
| 1915 | Unnamed 1915 stormSep 30 | 49 mi | Category 1 (81 mph) | Category 4 |
| 1912 | Unnamed 1912 stormJun 13 | 4 mi | Tropical storm (60 mph) | Tropical storm |
| 1911 | Unnamed 1911 stormAug 13 | 58 mi | Tropical storm (40 mph) | Category 1 |
| 1909 | Unnamed 1909 stormSep 21 | 26 mi | Category 2 (106 mph) | Category 3 |
| 1908 | Unnamed 1908 stormJul 31 | 72 mi | Tropical storm (56 mph) | Tropical storm |
| 1905 | Unnamed 1905 stormOct 9 | 8 mi | Tropical storm (43 mph) | Tropical storm |
| 1905 | Unnamed 1905 stormSep 29 | 54 mi | Tropical storm (40 mph) | Tropical storm |
| 1893 | Unnamed 1893 stormSep 7 | 40 mi | Category 1 (77 mph) | Category 2 |
| 1892 | Unnamed 1892 stormSep 12 | 65 mi | Tropical storm (52 mph) | Tropical storm |
| 1890 | Unnamed 1890 stormAug 27 | 19 mi | Tropical storm (44 mph) | Tropical storm |
| 1888 | Unnamed 1888 stormAug 20 | 4 mi | Category 1 (84 mph) | Category 3 |
| 1886 | Unnamed 1886 stormJun 15 | 61 mi | Tropical storm (47 mph) | Category 2 |
| 1879 | Unnamed 1879 stormSep 1 | 3 mi | Category 2 (96 mph) | Category 3 |
| 1877 | Unnamed 1877 stormSep 18 | 67 mi | Category 1 (81 mph) | Category 1 |
| 1869 | Unnamed 1869 stormSep 6 | 24 mi | Tropical storm (46 mph) | Category 1 |
| 1867 | Unnamed 1867 stormOct 4 | 70 mi | Category 2 (104 mph) | Category 2 |
| 1863 | Unnamed 1863 stormOct 1 | 9 mi | Tropical storm (46 mph) | Tropical storm |
| 1860 | Unnamed 1860 stormOct 2 | 13 mi | Category 1 (91 mph) | Category 2 |
| 1856 | Unnamed 1856 stormAug 11 | 48 mi | Category 2 (108 mph) | Category 4 |
Strength is the sustained wind on the track at the closest point, which is not the wind felt in Geismar: a hurricane's worst winds sit within a few dozen miles of its centre, and inland cities are usually past that.
Tornadoes within 25 miles of Geismar
By decade
- 2020s11
- 2010s35(1 EF3+)
- 2000s15
- 1990s14(1 EF3+)
- 1980s14
- 1970s15(2 EF3+)
- 1960s7(2 EF3+)
- 1950s7
| Date | Rating | Distance | Path | Killed / injured |
|---|---|---|---|---|
| Aug 25, 1992 | F3 | 24 mi | 9 mi | 2 / 32 |
| Feb 23, 2016 | EF3 | 12 mi | 7.78 mi | 0 / 0 |
| Apr 26, 1973 | F3 | 20 mi | 0.3 mi | 0 / 0 |
| Sep 16, 1971 | F3 | 17 mi | 7.3 mi | 0 / 3 |
| Dec 25, 1969 | F3 | 8 mi | 13.5 mi | 0 / 1 |
| Apr 12, 1969 | F3 | 7 mi | 10.7 mi | 0 / 1 |
| Feb 23, 2016 | EF2 | 12 mi | 12.95 mi | 2 / 75 |
| Jun 8, 1989 | F2 | 24 mi | 10 mi | 2 / 30 |
| Jun 6, 2019 | EF2 | 13 mi | 2.62 mi | 0 / 5 |
| Feb 23, 2016 | EF2 | 25 mi | 4.33 mi | 0 / 0 |
| Jun 8, 1989 | F2 | 24 mi | 9.5 mi | 0 / 60 |
| Feb 15, 1987 | F2 | 18 mi | 3 mi | 0 / 4 |
The strongest 12 of 118, by rating and then by deaths. Ratings before February 2007 are on the original Fujita scale.
Hail in Geismar
The Storm Prediction Center has 52 hail reports within 10 miles of Geismar since 1956, made on 34 separate days. Of these, 43 were 1 inch across or larger, and 4 reached 2 inches. The largest, 3 inches (tea cup size), fell on December 3, 1962. The most recent report is from May 6, 2025. March has the most reports, 14.
Source: NOAA Storm Prediction Center severe weather reports, data through 2025.
Weather by month in Geismar
The nearest NOAA station with 1991–2020 climate normals is Carville 2 SW, LA, 7 miles west of Geismar at 25 feet. July and August are the warmest, with an average high of 90°F and low of 75°F; January is the coolest, at 62°F and 43°F. June is the wettest at 7.1 inches of precipitation on average and November the driest at 4.1 inches; the year adds up to 62.7 inches over 79 days with at least a tenth of an inch. June to November, the hurricane season months, bring 53% of the year's precipitation (33.0 of 62.7 inches); the other six months are drier. September has brought the most of the 64 tropical systems that passed within 75 miles (26); a normal September there has highs of 87°F and 4.5 inches of precipitation. Highs reach 90°F on about 72 days a year, almost all from May to September. Lows fall below freezing on about 10 nights a year. That 62.7 inches is more than at 53 of the 81 Louisiana stations used on this site (65%). Donaldsonville, 7 miles south, has its own station (Donaldsonville 4 SW, LA): 63.5 inches a year, 0.8 more than here, and a July average high of 91°F against 90°F.
| Month | High °F | Low °F | Precip. in | Days ≥ 0.1" |
|---|---|---|---|---|
| Jan | 62 | 43 | 5.5 | 7 |
| Feb | 66 | 47 | 4.4 | 6 |
| Mar | 72 | 52 | 4.4 | 6 |
| Apr | 78 | 59 | 4.8 | 5 |
| May | 84 | 67 | 5.6 | 6 |
| Jun | 89 | 73 | 7.1 | 9 |
| Jul | 90 | 75 | 6.3 | 9 |
| Aug | 90 | 75 | 6.0 | 9 |
| Sep | 87 | 71 | 4.5 | 6 |
| Oct | 80 | 61 | 5.0 | 5 |
| Nov | 70 | 50 | 4.1 | 5 |
| Dec | 64 | 45 | 5.0 | 6 |
| Year | 78 | 60 | 62.7 | 79 |
Averages for 1991–2020 at Carville 2 SW, LA (25 ft), from NOAA NCEI U.S. Climate Normals. Normals describe the station; the farther a place is from it, and the bigger the difference in height, the more its weather can differ.
Floods, thunderstorm wind and lightning near Geismar
Since 1996, the National Weather Service has logged 121 flood, rain, thunderstorm wind and lightning events that began within 10 miles of Geismar: 89 thunderstorm wind reports, 25 flash floods, 4 heavy rain events, 2 lightning strikes and 1 flood. They killed 1 person and injured 1, and the NWS estimated $468.0 million in property and crop damage. The strongest thunderstorm gust on record here was 81 mph, on July 11, 2001. May has had the most flash floods, 8 of 25. Of the 239 Louisiana cities on this site with a flash flood on record, 168 have had fewer than Geismar.
May 28, 2014: flash flood 2 miles from the centre of Geismar — 1 killed, $200,000 damage.
NWS: “Heavy rainfall resulted in significant roadway flooding. Numerous roads were reported impassable or closed due to high water in the Gonzales area.”
March 5, 2011: thunderstorm wind 6 miles from the centre of Geismar — 1 injured, $5,000 damage.
August 12, 2016: flash flood 9 miles from the centre of Geismar — $460.0 million damage.
Source: NOAA NCEI Storm Events Database, events whose starting point is on record, 1996 to June 30, 2026. Damage is the NWS estimate in the dollars of the year, not insured losses, and NWS notes that some reports are unverified.
Flood insurance claims, disaster declarations and FEMA risk ratings
Flood insurance policyholders in Geismar's ZIP code 70734 have filed 123 claims with the National Flood Insurance Program since 1979, and were paid $3.8 million for buildings and contents, in the dollars of each year. The most came from Mid-summer severe storms in 2016: 45 claims (37% of all) and $2.2 million, then 2021 Mid-Spring Severe Storms in 2021 with 18. 69% of the claims carry the name of a storm or flood event; the rest have no event name. Of the 219 Louisiana cities on this site with 10 or more claims, 86 have fewer than Geismar.
| Event | Claims | Paid |
|---|---|---|
| Mid-summer severe storms2016 | 45 | $2.2 million |
| 2021 Mid-Spring Severe Storms2021 | 18 | $1.1 million |
Ascension Parish, which includes Geismar, has been named in 58 federal disaster or emergency declarations since 1965, 39 of them major disasters (by incident: 29 hurricanes, 14 floods, 4 coastal storms, 2 biological emergencies). The latest major disaster declaration was Hurricane Francine, on September 16, 2024. FEMA's National Risk Index gives Ascension Parish a Relatively Moderate rating for natural hazard risk overall; by hazard: Relatively High for hurricanes, tornadoes and lightning; Relatively Moderate for hail, inland flooding, coastal flooding, strong wind and heat waves. It models the county's expected loss from all 18 hazards it covers at $120.1 million a year, the 9th highest of 64 Louisiana counties; of the hazards above, the largest share, $74.2 million (62%), is from hurricanes.
Claims: FEMA, OpenFEMA Dataset FIMA NFIP Redacted Claims – v3, summed over ZIP codes; payments in the dollars of each year, not adjusted for inflation. Declarations: Disaster Declarations Summaries – v2, by county. Retrieved October 25, 2026. This product uses the Federal Emergency Management Agency's OpenFEMA API, but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).
Risk ratings: FEMA, National Risk Index county table, December 2025 (v1.20), retrieved October 26, 2026; ratings compare counties nationwide, are meant for planning and are no substitute for a local risk assessment. This product uses the Federal Emergency Management Agency's National Risk Index dataset API or downloadable datasets but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).
What counts as a pass, the distances and the sources: how this storm history is built.
Cities near Geismar
- Gonzales, LA5 mi
- Saint Gabriel, LA6 mi
- Donaldsonville, LA7 mi
- Prairieville, LA8 mi
- Sorrento, LA9 mi
- White Castle, LA10 mi
- Saint Amant, LA11 mi
- Belle Rose, LA13 mi
- Plaquemine, LA15 mi
- Baton Rouge, LA16 mi
- Maurepas, LA17 mi
- Addis, LA18 mi
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