| July 2011 | Flash Flood | East Dubuque | 3 killed, $7,000,000 | Torrential rains of 7 to 15 inches caused some flash flooding across Jo Davies County during the evening of July 27 and morning of July 28. Numerous streets were reported flooded in East Dubuque causing sink holes to form as well as buckling of the road rending them impassible. A 70 year old woman died in the flood waters after being thrown from a vehicle overcome by flood waters while traveling along Long Hollow Road near Elizabeth, IL. A 75 year old man died in his car which was swept away in flood waters near Galena, IL. A Galena, IL man died of electrocution going down into his flooded basement. |
| February 1999 | Thunderstorm Wind | Elizabeth | 2 hurt | no account filed |
| July 2009 | Thunderstorm Wind | Galena | 1 hurt, $50,000 | Wind gusts estimated to be 70 mph blew a semi truck over onto a car on Highway 20 near Mount Hope Road about 1 mile east of Galena, IL around 655 pm July 24. One person was injured. In addition, several trees were blown down in the area. |
| July 2007 | Thunderstorm Wind | Warren | 1 hurt, $25,000 | Winds estimated to be 70 mph blew down trees and power lines. Several trees fell onto some houses. One person was transported to a hospital with a minor injury and later released. Power and phone service was knocked out to about half of the town. |
| February 1999 | Thunderstorm Wind | Stockton | 1 hurt | no account filed |
| July 2017 | Flash Flood | East Dubuque | $6,500,000 | Widespread flash flooding occurred throughout the county from 3 to over 9 inches of rain. Almost 1000 structures were flooded. Two water treatment sewage plants sustained damage with thousands of acres of crops lost. Preliminary damage estimates are between 7 and 8 million dollars. |
| July 2010 | Flash Flood | East Dubuque | $1,000,000 | Heavy rains of 3 to 9 inches fell across Jo Daviess County during the late evening of July 22 and through the morning of July 23 resulting in flash flooding of much of the county. At 315 am CDT, water was over Highway 20 near Galena and Highway 35 near East Dubuque. Apple River overflowed its banks due to the flash flooding. In Elizabeth, water was flowing out of manhole covers. In addition, Lone Street and Apple River Road were closed due to the flood waters. At 940 am CDT, water rescues were in progress in Elizabeth. Several roads were closed due to flooding. |
| April 2010 | Thunderstorm Wind | Apple Canyon Lake | $500,000 | More than half the homes in Woodbine, IL suffered some degree of damage as severe storms moved through the area around 1125 pm April 5. Most of the damage was from downed trees and limbs. Two parked semi-tractor trailers were overturned. Some utility poles snapped near the ground. A garden shed was blown over and other outbuildings were damaged. Shingles, sheets of tin roofing, and tree debris littered the streets. Several homes north of Woodbine and near Apple Canyon Lake sustained damage from fallen trees. This report was from the Freeport Journal Standard. |
| July 2010 | Flash Flood | East Dubuque | $500,000 | Heavy rains during the late night of July 23 and early morning of July 24 resulted in flash flooding of much of Jo Daviess County during the morning of July 24. Major flooding was observed along the Apple River near Elizabeth, where the river level was just below the bridge deck of Highway 20. Water rescues of stranded motorists were performed near Galena, Stockton, and Scales Mound between 4 am CDT and 630 am CDT. A bridge was washed out near Little Rush Creek and Bethel Road about 3 miles east southeast of Elizabeth, IL. A grocery store in Stockton was flooded with 3 inches of water.||Galena closed their flood gates around 5 am CDT on Saturday the 24th, and the Galena River crested about 3 feet high in front of the gates. |
| April 2010 | Thunderstorm Wind | Galena | $250,000 | Wind gusts estimated to be 70 mph ripped the roof off of Tri State Screen Printing and Embroidery located at 11530 Technical Drive about 3 miles west northwest of Galena, IL around 1110 pm April 5. |
| April 2011 | Flood | East Dubuque | $250,000 | no account filed |
| June 1967 | Tornado (F2) | not stated | $250,000 | no account filed |
| July 1966 | Tornado (F1) | not stated | $250,000 | no account filed |
| July 2004 | Hail | Galena | $240,000 | Also reported by law enforcement and the general public. Hail ranged in size from 1.50 inches to 2.50 inches. |
| July 2017 | Flash Flood | Apple River Canyon Sp | $200,000 | A trained spotter reported a brand new bridge was washed on the main road out of Stockton. The spotter reported it was the worst flooding he had ever seen in over 20 years. |
| July 2009 | Thunderstorm Wind | Guilford | $150,000 | Wind gusts estimated to be 70 mph blew down several trees in the vicinity of the Galena Territory just east of Galena, IL around 650 pm July 24. One tree fell onto a house in the Galena Territory area. |
| June 2015 | Thunderstorm Wind | Menominee | $100,000 | Menominee fire house was blown over in damaging winds. |
| July 2011 | Thunderstorm Wind | Apple River | $100,000 | Wind gusts estimated to be 70 mph blew down several large trees and a metal flag pole in Apple River, IL at 620 am CDT July 11. Almost every property in the 400 person town suffered some damage. Information from this report was also attained from a news paper article. |
| August 2009 | Flash Flood | Council Hill Station | $100,000 | Heavy rains caused some flash flooding in parts of Jo Daviess County during the afternoon and evening of August 9. Some roads and culverts near Scales Mound, IL were washed out and Small Pox Creek flooded out of its banks forcing the closure of several roads. |
| April 2004 | Thunderstorm Wind | East Dubuque | $70,000 | no account filed |
| June 2011 | Thunderstorm Wind | Stockton | $50,000 | Wind gusts estimated to be 70 mph caused tree damage and siding damage across Stockton, IL around 930 pm CDT June 8. One large tree limb fell onto a car. |
| July 2009 | Thunderstorm Wind | East Dubuque | $50,000 | Wind gusts estimated to be 70 mph blew a garage down at 7427 Main Street about 4 miles east of East Dubuque, IL around 655 pm July 24. A boat and truck stored inside the garage were also destroyed. |
| July 2003 | Thunderstorm Wind | Stockton | $50,000 | Trees & power lines down |
| July 2017 | Flash Flood | Stockton | $40,000 | A trained spotter reported widespread flooding in the town of Stockton. Rainfall totals reached 7.81 inches in 6 hours. |
| February 1999 | Thunderstorm Wind | Woodbine | $40,000 | no account filed |
| June 2010 | Thunderstorm Wind | Galena | $25,000 | Wind gusts estimated to be 70 mph blew a tree down onto a house in Galena, IL at 155 pm June 18. The local utility company also reported several outages due to trees on power lines and trees down in the right-of-way. |
| June 2010 | Thunderstorm Wind | Scales Mound | $25,000 | Wind gusts estimated to be 70 mph blew a roof off a house in Scales Mound, IL around 205 pm June 18. |
| June 2009 | Thunderstorm Wind | East Dubuque | $25,000 | Wind gusts estimated to be 75 mph uprooted a tree in East Dubuque, IL around 909 am June 19. The tree fell onto some power lines and caught on fire. |
| May 2008 | Thunderstorm Wind | Galena | $25,000 | Winds estimated to be 70 mph blew down numerous trees across the entire county between 9 and 10 pm. |
| August 2008 | Thunderstorm Wind | Stockton | $25,000 | Wind gusts estimated to be 70 mph blew a tree onto a house in Stockton, IL at 610 pm August 4. |
| May 1956 | Tornado (F1) | not stated | $25,000 | no account filed |
| July 2022 | Lightning | Galena | $20,000 | The Jo Daviess County Sheriff's Department reported that lightning struck their office and damaged a fire alarm and computer equipment, and disabled their 911 connection. |
| July 2004 | Flash Flood | Galena | $20,000 | Water 12 inches deep or better running down the streets in and near the downtown area. Many streets impassable. |
| July 2004 | Hail | Galena | $14,000 | Also reported by law enforcement. Hail ranged from 0.88 inches to 1 inch. |
| August 2007 | Thunderstorm Wind | Galena | $10,000 | Winds estimated to be 70 mph blew down several branches in the vicinity of Galena, IL. The public works department reported that two truckloads of branches have been removed. The utility company reports that some branches fell onto power lines. Delayed report. |
| March 2005 | Hail | Galena | $10,000 | Also reported by Co-op. Hail ranging from 1 inch to 1.75 inches covered the ground in Galena. |
| June 2004 | Flash Flood | Stockton | $10,000 | U.S. 20 impassable |
| June 2004 | Flash Flood | Galena | $10,000 | Numerous roads under water with depths ranging from 6 inches to 3 feet; Known roads closed include Field Street, Stagecoach Trail Rd, and intersection of Spring and U.S. 20 |
| August 2003 | Lightning | Stockton | $7,500 | Location is 0.5 to 1.5 miles west of Loran, Illinois in Stephenson County. The barn was in poor condition and was used to house only cattle and hay. All the cattle were successfully evacuated from the barn and the hay was very old and in poor quality. |
| August 2005 | Thunderstorm Wind | Warren | $7,000 | Several large oak trees were downed in the town of Warren with one tree down on a house. |
| July 2017 | Flood | Galena | $5,000 | The county emergency manager reported that the Galena River was flooded and the flood gates are closed in Galena. Numerous grade crossings were under water or damaged. |
| August 2008 | Thunderstorm Wind | Galena | $5,000 | Wind gusts estimated to be 60 mph ripped the siding off the west side of a residence 3 miles southeast of Galena, IL at 530 pm August 4. |
| August 2007 | Lightning | East Dubuque | $5,000 | Lightning caused power outages during the early morning hours of August 7th across parts of Jo Daviess County. A transformer was damaged and needed to be replaced. |
| June 2005 | Thunderstorm Wind | Stockton | $5,000 | Power out. |
| June 2005 | Thunderstorm Wind | Warren | $5,000 | Large trees down; 1 on a house and another on railroad tracks |
| May 2004 | Heavy Rain | Galena | $5,000 | 1 inch of rain in 15 minutes. Yards flooded. |
| August 2003 | Thunderstorm Wind | Stockton | $5,000 | Measured gust by Co-op |
| June 1995 | Thunderstorm Wind | Monmouth | $5,000 | During the early morning hours thunderstorms produced street flooding in Monmouth where 16 to 18 inches of water covered several roadways until storm sewers could catch up on drainage. Strong winds downed several trees blocking roads and taking out power and cable television lines. Power was lost to about 130 Monmouth residents. Later in the afternoon thunderstorm winds blew a large tree down in the community of Galena but only produced minor damage. |
| April 1994 | Thunderstorm Wind | East Dubuque | $5,000 | Thunderstorm winds damaged a porch in East Dubuque and knocked down trees at Menominee. Large hail damaged cars and siding at Elizabeth. |
| April 1994 | Hail | Elizabeth | $5,000 | Thunderstorm winds damaged a porch in East Dubuque and knocked down trees at Menominee. Large hail damaged cars and siding at Elizabeth. |
| June 2005 | Thunderstorm Wind | Galena | $4,000 | Power lines sagging at U.S. 20 and Blackjack Road |
| July 2018 | Thunderstorm Wind | Elizabeth | $3,000 | Local law enforcement reported windows were blown out and a deck was severely damaged on a house. |
| July 2006 | Thunderstorm Wind | Elizabeth | $3,000 | trees and corn down |
| July 2006 | Thunderstorm Wind | Hanover | $3,000 | Trees down. Estimated 56 to 63 knot (65 to 75 mph) winds |
| May 2004 | Thunderstorm Wind | Apple River Canyon Sp | $3,000 | Large cottonwood tree down |
| June 1998 | Thunderstorm Wind | Galena | $3,000 | Numerous trees were downed by strong thunderstorm winds from Galena to Stockton. |
| May 2004 | Thunderstorm Wind | Galena | $3,000 | no account filed |
| August 2007 | Lightning | East Dubuque | $2,000 | A lightning strike caused telephone problems for the East Dubuque area during the early morning hours of August 14th. Time estimated. |
| June 2006 | Thunderstorm Wind | Stockton | $2,000 | trees and power lines down |
| June 2006 | Thunderstorm Wind | Warren | $2,000 | trees and power lines down |