Jefferson County, Wisconsin Storm events, disaster declarations and flood insurance claims on record

The five hazards

A hazard name opens the page of that hazard for the county. A hazard has a page from 10 events. The year 2026 has the events through 30 Jun 2026 only.

Forecast zones with the name of the county give 463 of the 1,097 events. A county count has the events that NCEI gives to the county. It also has the events of a forecast zone that has the name of the county. A zone with another name counts for the state only.

The columns for the state and the United States total the counties. They count the events of each county in the same way as the county column. The site gives a rate for each 10,000 residents only from 10,000 residents. Residents and area: Census Bureau, 2021.

Newest storm events on record

The 25 events above are the newest in the NCEI record. A place is the text of the NCEI record: a distance and a direction from a reference place. Wind speed is in miles per hour, with the knots that NCEI gives. The site does not show a place text that names a private property or reads as a person. Download these events (CSV)

A darker cell has a larger count. The number is in each cell.

NCEI recorded tornado events from 1950, and hail and thunderstorm wind events from 1955. It recorded all event types from 1996. A count before 1996 has fewer event types.

FEMA disaster declarations

DR is a major disaster declaration. EM is an emergency declaration. FM is a fire management assistance declaration. A declaration for the whole state is on the Wisconsin page. What a disaster declaration is

Flood insurance claims (NFIP)

OpenFEMA has 503 NFIP claims on record for Jefferson County from 1978 through 8 Sep 2026.

The NFIP paid $11,031,858 on 417 claims.

The county has 71.9 NFIP claims for each 1,000 policies in force. The rate uses 11 claims with a year of loss from 2016 to 2025. FEMA counts 153 residential policies in force on 3 Aug 2026. The claims have every type of building. FEMA counts residential policies only.

A darker cell has a larger count. The number is in each cell.

A year with fewer than 5 claims shows the count of claims and no amount. A year with 1 to 4 claims with a payment shows no amount either. Such an amount could point to one property. The amount is the sum of the building, contents and increased cost of compliance payments. FEMA counts 28 multiple-loss properties in the county (2 Aug 2026). How FEMA redacts NFIP claims

National Risk Index

Risk Index rating

Relatively Low

Risk Index score

75.8 of 100

Expected Annual Loss rating

Relatively Low

Expected Annual Loss

$42 million

Social Vulnerability rating

Very Low

Community Resilience rating

Very High

The labels and the ratings are those of FEMA. Expected Annual Loss is a figure for a whole county. It is not a figure for a property. How to read the National Risk Index

Tropical storm and hurricane tracks

The HURDAT2 record of the National Hurricane Center has 1 track within 100 miles of the centre point of the county, through the 2025 season. 0 of them were within 50 miles at hurricane strength.

A name is the storm name that the National Hurricane Center gave. The distance is from the centre line of the track. It does not show how far the wind, the rain or the surge of a storm went.

ZIP Codes, cities and towns of Jefferson County

Each ZIP Code below has a page with its NFIP claims by year. 6 more ZIP Codes have fewer than 5 claims and no page.

• 53094
• 53538
• 53549

A city or town has no page of its own. This page is the record for the whole county, which has these places:

• Cambridge
• Fort Atkinson
• Hebron
• Helenville
• Ixonia
• Jefferson
• Johnson Creek
• Lac La Belle
• Lake Koshkonong
• Lake Mills
• Lake Ripley
• Palmyra
• Rome
• Sullivan
• Waterloo
• Watertown
• Whitewater