Green County

Every recorded tornado

1. Injuries and deaths are for the tornado’s whole path, which may extend beyond the county. Deaths recorded within Green County: 0.
2. Weak tornadoes were under-recorded before Doppler radar coverage became national in the early 1990s, so earlier decades read low. Ratings use the Fujita scale before February 2007 and the Enhanced Fujita scale after.

Storm Prediction Center severe weather database, 1950 to 2025.

Every large fire

1. Large fires mapped by the Monitoring Trends in Burn Severity program since 1984: 1,000 acres or more in the West, 500 or more in the East. Prescribed burns are excluded. Acres here are the part of each perimeter inside this place.

Monitoring Trends in Burn Severity (USGS and U.S. Forest Service), 1984 to 2026.

Smoke overhead

1. A smoke day is a date on which a smoke plume traced by NOAA Hazard Mapping System analysts from satellite imagery covered this place's point (the county's population centre or the city centre). Counts here are of medium or heavy smoke. Since 2018 analysts have often drawn light smoke as one area over most of the continent, so light-smoke counts are not comparable from year to year. The plumes show smoke anywhere in the air above, not air quality at the ground, and smoke hidden by cloud is missed.

NOAA Hazard Mapping System smoke analysis, 2011 to 2026, retrieved October 30, 2026.

Claims by ZIP code

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).

OpenFEMA NFIP Redacted Claims v3, refreshed August 4, 2026. NOAA Storm Events through 2026.

River crests

River gauges

1. Crests are the highest and the recent crests the National Weather Service lists for each river gauge in the county that has a flood stage, not every flood. Flood categories use each gauge's current flood stages; crests from before levees, dams or channel changes may not be comparable. Crests measured on an old datum are left out of the rankings.

NOAA National Water Prediction Service gauge records, retrieved October 30, 2026.

1. The Palmer Drought Severity Index is computed by NOAA each month from the county's average temperature and precipitation, relative to the county's own climate. Zero is normal; -3 or lower is severe drought and -4 or lower extreme drought. It describes the long-term balance of moisture, not water supply or crop losses.

NOAA NCEI nClimDiv county Palmer Drought Severity Index, 1895 to September 2026, issued October 6, 2026.

More event types since 1996

Costliest events since 1996

1. Jul 18, 1996Flash Flood$6.0 million
   National Weather Service narrative

   The same thunderstorms that trained southeast through nextdoor Lafayette county also created flash flooding in the Browntown to Monroe areas down to Martintown in Green county. Rainfall amounts in a 5 hour period ending at 0200CST generally totaled 10 to 12 inches in this triangular area. Up to 13.50 inches fell about 6 miles northwest of Monroe!! A bridge on the Highway 11 approach to Browntown was washed away as water depths on the road reached 4 feet. The highway east of Browntown was closed for several days after the flood waters receded. Most roads into Browntown were closed due to flash flooding of streams, creeks, and rivers. Consequently, Browntown was almost isolated. The…

2. Aug 5, 2000Thunderstorm Wind$1.5 million
   National Weather Service narrative

   This summer's most powerful downburst wind event to affect south-central and southeast Wisconsin pummeled portions of Dane, Green, and Rock counties with damaging hurricane-force winds, large hail, and urban-flood rains. As the 35 mile long line of thunderstorms moved southeast through Dane, northern Green, and Rock Counties, it increased in strength, ultimately producing straight-line winds estimated up to 100 knots (115 mph), heavy rains at a rate of 1 to 3 inches per hour, and hail stones 1 inch in diameter. Due to downed power lines and poles, ultimately about 18,000 customers had electrical power disrupted for 1 to 2 days. Descriptions of weather-related events follow in a…

3. Jun 8, 2008Flash Flood$1.3 million
   National Weather Service narrative

   Heavy rains resulted in flash flooding across much of Green County. Water depths on road surfaces reached 3 feet or more and there were gravel washouts. Some farm fields remained flooded into early July. The breakdown for residential home losses were: 109 with minor damage, 12 with major damage, and 1 destroyed (total of $750 thousand for home losses). There were no business losses. Farm buiding losses were: 1 with minor damage, 2 with major damage, and 4 destroyed (for a total of $195 thousand in farm building losses). Crop losses were estimated at $20 million. Public sector damage was about $373.3 thousand. There were several roads and bridges that sustained damage.

4. Mar 31, 2023Tornado$600,000
   National Weather Service narrative

   Tornado started south of Juda and tracked to the east of the city before going to the west of Decatur Lake. Most of the damage was along County Road F where a number of farm outbuildings were damaged, particularly to roofs. Some areas had power lines that were snapped due to the wind.

5. Feb 8, 2024Tornado$500,000
   National Weather Service narrative

   Damage was mainly to small barns and outbuildings though one home south of Albany took a hit and lost it's roof. Condensation funnel may not have been visible for much of the life of the tornado until it's end near Albany.

6. Aug 22, 2007Flash Flood$400,000
   National Weather Service narrative

   Several rounds of thunderstorms with heavy rains on top of a saturated ground resulted in another round of scattered flash flooding across Green County. At least another 150 residents sustained water damage to basement contents and/or basement walls. Two homes in Browntown had basements on the verge of collapsing. One farm home near Brooklyn had 5 feet of water in the basement and the basement walls cracked. Two silos on the same property had cracking due to water accumulation. In the city of Brodhead, a sink hole developed which resulted in the sewer system collapsing at that location. Road damages (gravel washouts or culverts) were scattered around the county, and totaled…

7. Aug 19, 2007Flash Flood$400,000
   National Weather Service narrative

   Flash flooding occurred in scattered locations between the northeast corner around Dayton down to the Brodhead area. Fast-flowing water of depths to 1 to 2 feet covered several roads in this area. In the Civil Town of Decatur, CTH F and CTH E were closed. In the Civil Town of Albany, Tin Can road between Zurfluh and CTH EE, CTH X at River Bridge, and River Road were closed. Some mudslides, soil erosion, and crop losses were also noted. At least 100 homes had some water damage to basement contents. WSR-88D Doppler overnight rainfall estimates ranged from around 3 inches over the southwest corner of the county to 5 to 6 inches over the northeast corner.

8. Jun 1, 2000Flash Flood$400,000
   National Weather Service narrative

   One would be hard pressed to find another day like June 1, 2000 in terms of depth and range of severe, convective weather events across south-central and southeast Wisconsin. Tornadoes, widespread and localized flash flooding, funnel clouds, damaging hurricane-force, straight-line winds associated with a wicked squall-line, large hail stones, urban/small flooding, lightning strikes, and significant mainstem river flooding were reported. As in the preceding weeks, a quasi-stationary front over northern Illinois served as a boundary for warm, moist, unstable air to be pulled north over the cooler air over Wisconsin. Leftover flooding (from the evening of May 31, 2000) and isolated…

9. Mar 31, 2023Tornado$400,000
   National Weather Service narrative

   Tornado tracked through mainly rural areas and did damage to some barns with a roofing structure severely damaged near Brunkow Road.

10. Jun 28, 2017Tornado$325,000
    National Weather Service narrative

    Along the path of the tornado, a barn and pole shed were destroyed, 4 houses sustained damage, 4 power poles were snapped, numerous trees were either snapped or uprooted and a camper was rolled into a pond. The majority of the tornado path had EF-0 damage, but there were pockets of EF-1 damage.

1. Storm Events records before 1996 cover only tornadoes, thunderstorm wind and hail. Damage figures are as reported by the National Weather Service at the time, not adjusted for inflation.

NOAA NCEI Storm Events Database, 1950 to 2026, issued October 26, 2026.

All-time high

111°F4 times, most recently Jul 14, 1936

All-time low

−36°FJan 30, 1951

Warmest night

82°FAug 6, 1947

Coldest day

−16°FJan 19, 1994

Wettest day

6.65 inAug 4, 1906

Snowiest day

14.4 inDec 9, 2009

Hottest year

1921mean 51.4°F

Coldest year

1962mean 42.7°F

Wettest year

193850.11 in

Driest year

197620.20 in

Snowiest season

76.7 in1950-51

Station Brodhead Wwtp (USC00471078), 780 ft elevation, 10.3 miles from the population centre. Daily records from 1897 to October 23, 2026; 98.7% of days in the last 30 years are complete. Records at a single station can differ from a city’s official threaded record, which may combine several stations.

NOAA NCEI Global Historical Climatology Network Daily.

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).

OpenFEMA Disaster Declarations Summaries, retrieved October 30, 2026. Statewide declarations are not listed.

Neighbouring counties

• Tornadoes NOAA Storm Prediction Center severe weather database, through 2025.
• Tropical cyclones NOAA National Hurricane Center HURDAT2 (Atlantic; Northeast and Central Pacific), through 2025.
• Wildfire USGS/USFS Monitoring Trends in Burn Severity, through 2026.
• Storm events NOAA NCEI Storm Events Database, through 2026.
• Flood insurance OpenFEMA NFIP Redacted Claims v3, refreshed August 4, 2026.
• Declarations OpenFEMA Disaster Declarations Summaries v2, retrieved October 30, 2026.
• Weather records NOAA NCEI Global Historical Climatology Network Daily, station USC00471078.
• River crests NOAA National Weather Service, National Water Prediction Service river gauges, retrieved October 30, 2026.
• Drought NOAA NCEI nClimDiv county Palmer Drought Severity Index, through September 2026.
• Smoke NOAA NESDIS Hazard Mapping System smoke analysis, retrieved October 30, 2026.
• Earthquakes USGS ANSS Comprehensive Earthquake Catalog (ComCat), retrieved October 30, 2026.

Joins, thresholds and known limits are set out in the methodology. Found an error? Report it. Page built October 30, 2026.