| April 1965 | Tornado (F4) | not stated | 8 killed, 275 hurt, $250,000,000 | no account filed |
| March 1956 | Tornado (F4) | not stated | 1 killed, 31 hurt, $2,500,000 | no account filed |
| January 2013 | Flood | Fowlerton | 1 killed | Local media reported that a 19 year old male lost control of his vehicle on State road 26, east of Fairmount, Indiana after encountering high water from a nearby stream that had flowed over the road. The vehicle flipped and the passenger compartment became submerged. A passing motorist contacted 911 and when responders arrived only one foot of the vehicle was visible. Deputies waded 30 to 40 feet off the road into roughly 3 feet of water and attached tow lines and subsequently pulled the vehicle out. The male was found unresponsive in the vehicle and was later pronounced dead at a local hospital. |
| April 1974 | Tornado (F2) | not stated | 12 hurt | no account filed |
| December 1967 | Tornado (F3) | not stated | 1 hurt, $250,000 | no account filed |
| December 1998 | Thunderstorm Wind | Marion | 1 hurt, $10,000 | AUTOMOBILE SIGNIFICANTLY DAMAGED WHEN PART OF A TREE FELL ACROSS IT. |
| March 2011 | Flood | Stonecrest | $1,000,000 | Flooding along the Mississinewa River continued into the first day of March. High water from the river spilled over into eastern portions of Marion as well as into the Stonecrest Mobile Home Community, where residents woke to flooded residences and roads. Sufficient water covered the entrances to the community to stop residents from entering and exiting the area, as well as causing school buses to divert away from the area. While no exact damage figures were provided, damage likely exceeded 1 million dollars from a combination of structural and roadway damage. |
| June 1998 | Tornado (F1) | Fairmount | $1,000,000 | THIS TORNADO TRACK WAS A CONTINUATION OF THE TORNADO WHICH BEGAN NEAR THE TOWN OF ELWOOD IN MADISON COUNTY. THE TORNADO WAS WEAKENING AS IT CROSSED INTO GRANT COUNTY BUT CAUSED EXTENSIVE DAMAGE TO SEVERAL FARMS. ONE FARMSTEAD SUFFERED A DESTROYED BARN AND AN OVERTURNED JUNK BUS. ANOTHER FARMSTEAD HAD A VERY LARGE METAL OUTBUILDING DESTROYED AND 3 LARGE SILOS WERE BLOWN INTO THE FARM HOUSE WHICH SUFFERED MAJOR DAMAGE. ANOTHER FARM LOST MOST OF ITS OUTBUILDINGS WITH THE ROOF OF THE HOUSE DAMAGED. ANOTHER FARM NEAR FAIRMOUNT SUFFERED SEVERE DAMAGE WITH 2 BARNS DESTROYED AND THE HOUSE LOST ITS ROOF.MANY TREES AND OUTBUILDINGS IN FOWLERTON WERE DAMAGED WERE THE TORNADO FINALLY LIFTED. |
| August 1998 | Flash Flood | Marion | $1,000,000 | EXTENSIVE FLOODING THROUGHOUT MARION AND THE COUNTY. MANY ROADS AND BRIDGES UNDER WATER. NUMEROUS RESIDENCES WERE EVACUATED ALONG THE MISSISSINEWA RIVER AS ARMY NATIONAL GUARDSMEN SANDBAGGED A WEAKENING DIKE ON THE EAST SIDE OF MARION. THE DIKE HELD BUT SEVERAL HOMES SUSTAINED WATER DAMAGE. |
| June 1998 | Tornado (F1) | Swayzee | $500,000 | THIS TORNADO WAS A CONTINUATION OF THE GREENTOWN TORNADO IN HOWARD COUNTY. THE TORNADO WAS WEAKENING AS IT CROSSED INTO GRANT COUNTY BUT CAUSED EXTENSIVE TREE DAMAGE ALONG ITS PATH AND SEVERLY DAMAGED SEVERAL HOMES IN SWAYZEE. MANY OF THE HOMES SUFFERED DAMAGE FROM UPROOTED TREES FALLING ON THEM. MANY TREES AND POWER LINES WERE REPORTED DOWN FROM THIS SERIES OF STORMS. IN ADDITION...VERY HEAVY RAIN CAUSED FLASH FLOODING ACROSS THE COUNTY WITH MANY COUNTY ROADS WASHED OUT OR UNDER WATER. |
| October 1992 | Tornado (F1) | not stated | $250,000 | no account filed |
| November 2005 | Thunderstorm Wind | Countywide | $200,000 | 8 to 10 barns as well as 3 mobile homes were destroyed. A hosue suffered severe window damage. Much of the damage occurred in Marion and Upland townships. Surveys from local emergency and NWS officials found evidence of the formation of gustnadoes where concentrated areas of damage were observed. |
| April 2001 | Thunderstorm Wind | Arcana | $150,000 | Several roofs reported blown off. Many trees down. |
| August 1998 | Thunderstorm Wind | Marion | $150,000 | WIDESPREAD TREE DAMAGE IN MARION AND ACROSS GRANT COUNTY. |
| April 2011 | Tornado (EF1) | Hackleman | $100,000 | A survey of damage in Grant County indicated that a circulation touched down roughly two miles southwest of Fairmount. The circulation touched down at a residence in the 10,000 block of County Road South 200 West. The back side of the roof of the residence was ripped off, along with some siding stripped and windows broken. Debris from the property was carried into the adjacent field. The tornado continued northeast where other residences as well as trees suffered varying degrees of damage. The tornado lifted near the intersection of State Routes 26 and 9. Damage found was consistent with winds between 100 and 110 mph. |
| June 2009 | Thunderstorm Wind | Shady Hills | $100,000 | Emergency management officials reported an old lumber building was blown down by the strong winds in Marion near the intersection of Branson and Swayzee St. In addition, several trees were uprooted onto cars and house and a railroad track crossing arm was broken. Damage is estimated at $100,000. |
| June 2008 | Thunderstorm Wind | Shady Hills | $50,000 | Emergency management officials reported numerous trees and power lines down in and around Marion. |
| August 2007 | Thunderstorm Wind | Shady Hills | $50,000 | Emergency Management officials reported 15 power poles down along N 500 E from CR 300 N to 100 N. Portions of State Route 15 in Marion were closed due to trees and power lines being blown down. Other trees and tree limbs were reported down across the county. |
| November 1998 | Thunderstorm Wind | Marion | $50,000 | SEVERAL TREES AND POWER LINES WERE BLOWN DOWN IN TOWN. ONE CAR WAS BADLY DAMAGED BY A LARGE TREE LIMB. ONE FARM OUTSIDE OF TOWN HAD A ROOF BLOWN OFF THE BARN. |
| July 1995 | Thunderstorm Wind | not stated | $50,000 | Strong thunderstorm winds blew down three barns, trees and power lines near Fairmount. |
| May 1994 | Thunderstorm Wind | not stated | $50,000 | A grain bin was blown over by thunderstorm winds southeast of Gas City. |
| March 2025 | Lightning | Fairmount | $35,000 | Barn caught on fire due to a lightning strike. |
| June 2008 | Thunderstorm Wind | Fowlerton | $25,000 | Spotters reported a semi was flipped on southbound Interstate 69 near mile marker 53. |
| July 2003 | Flash Flood | Marion | $25,000 | Law enforcement reported one house with water into the first floor and numerous roads closed due to flash flooding. |
| March 1971 | Tornado (F1) | not stated | $25,000 | no account filed |
| June 1966 | Tornado (F2) | not stated | $25,000 | no account filed |
| April 1965 | Tornado (F2) | not stated | $25,000 | no account filed |
| July 2024 | Thunderstorm Wind | Shady Hills | $20,000 | Several healthy trees snapped or downed. One travel trailer was tipped on its side. |
| February 2008 | Flood | Stonecrest | $15,000 | Emergency management officials reported that Stone road, the main access into the Stonecrest Manor mobile home park, was closed due to eight inches of water flowing over the road from river flooding on the Mississinewa River. No evacuations were reported. |
| June 2006 | Thunderstorm Wind | Marion | $15,000 | A section of the Grant County courthouse roof was blown off. Several power lines blown down. |
| November 2005 | Tornado (F1) | Van Buren | $15,000 | The tornado touched down southwest of the intersection of county roads 200 north and 600 east, traveled northeast and lifted near the intersection of county roads 400 north and 800 east. Damage was confined to a house suffering roof damage, several trees and power lines and grain elevator augers being overturned. The tornado crossed Interstate 69, just north of mile marker 66, which resulted in a semi truck being blown off the highway. No injuries were reported with the tornado. Damage was estimated at around $15,000. |
| May 2024 | Thunderstorm Wind | Fairmount | $14,000 | Powerlines are down, blocking some roads. |
| April 2023 | Thunderstorm Wind | Fowlerton | $12,000 | A semi truck blown over on Interstate 69 north of Fowlerton. |
| May 2025 | Thunderstorm Wind | Fairmount | $10,000 | Report of power lines down. |
| May 2008 | Thunderstorm Wind | Sims | $10,000 | Straight-line thunderstorms winds were determined to be the cause of damage in the 9000 block of West 400 South, just to the south of Swayzee. A carport at a residence at 9740 West 400 South was destroyed with a trailer suffering damage. Just across and down the road a tree fell down onto a house at 9800 W 400 S. A woman was going down her stairs taking shelter when she fell and hurt her arm. |
| June 2008 | Thunderstorm Wind | Mier | $10,000 | Trained spotters reported trees and power lines down west of Sweetser. |
| July 2007 | Thunderstorm Wind | Matthews | $10,000 | Trees and power lines were reported down southeast of Upland. |
| July 2007 | Thunderstorm Wind | Shady Hills | $10,000 | A semi was blown over at State Route 18 and Interstate 69. A steel shed was also blown over in the Marion area. |
| June 2006 | Thunderstorm Wind | Swayzee | $10,000 | Power lines down. |
| June 2005 | Thunderstorm Wind | Countywide | $10,000 | Trees and power lines were reported down across the county. A house suffered some roof damage from the strong winds in Marion. A James Dean festival was in progress at the county airport when the storm struck. Organizers were able to get everyone into shelter before the storms hit. Several tents were blown down, but no serious damage or injuries occurred. |
| July 2005 | Thunderstorm Wind | Fairmount | $10,000 | A power pole was blown down onto county road 1000 south, west of Fairmount. A driver heading westbound on the road did not see the pole and struck it. Power lines were reported on the vehicle after it was struck, trapping the driver. The pole broke out one of the back windows and caused some other damage. |
| May 1999 | Thunderstorm Wind | Fowlerton | $10,000 | Two roofs partially torn off. |
| May 1999 | Thunderstorm Wind | Hackleman | $10,000 | Trailer damaged from falling trees. |
| August 1998 | Thunderstorm Wind | Hackleman | $10,000 | NUMEROUS TREES DOWN. |
| March 1996 | Thunderstorm Wind | Fairmount | $10,000 | no account filed |
| August 2021 | Thunderstorm Wind | Arcana | $6,000 | Law enforcement reports multiple trees and powerlines down. |
| April 2026 | Thunderstorm Wind | Arcana | $5,000 | Report of damage east of Eastbrook. Damage to a shed and fence at one home and a window blown out at another. A barn in the area also has damage. |
| May 2025 | Thunderstorm Wind | Matthews | $5,000 | Three foot diameter tree down across Wheeling Pike and CR 600. |
| July 2024 | Thunderstorm Wind | Shady Hills | $5,000 | Large trees down and power lines down in the Avondale Area. |
| July 2022 | Thunderstorm Wind | Home Corner | $5,000 | Report of tree on house and power lines via central dispatch. |
| June 2008 | Thunderstorm Wind | Fairmount | $5,000 | State police reported some trees and power lines down near State Route 9 and 1050 South. |
| June 2008 | Thunderstorm Wind | Mier | $5,000 | Emergency management officials reported power lines were down at county road 700 West and State Route 18. |
| November 2005 | Thunderstorm Wind | Marion | $5,000 | Power lines were blown down in the area. |
| May 2000 | Thunderstorm Wind | Marion | $5,000 | Tree down on car. |
| May 1994 | Thunderstorm Wind | not stated | $5,000 | Thunderstorm winds recorded to 60 mph took trees and lines down across the county. |
| May 1994 | Thunderstorm Wind | not stated | $5,000 | Trees were blown down by thunderstorm winds in Mathews. |
| June 2006 | Thunderstorm Wind | Marion | $3,000 | Several trees blown down with some coming down on power lines. |
| June 1973 | Tornado (F1) | not stated | $2,500 | no account filed |
| April 1958 | Tornado (F1) | not stated | $2,500 | no account filed |
| April 2026 | Thunderstorm Wind | Shady Hills | $2,000 | Report of a tree down and damage to a porch on the east side of Marion. |