FEMA flood zones · Tennessee

Trousdale County, Tennessee Flood Zone Map

26 flood insurance claims·$272,669 paid·1 federal flood & hurricane disasters

12% of Trousdale County’s area is in FEMA’s high-risk flood zones, and another 1% in shaded X (mostly the 0.2% floodplain and areas behind levees).

Share of the whole county outline, rivers and lakes included; parts FEMA hasn’t mapped count as zero.

Coastal high risk (V, VE)FloodwayHigh risk (A, AE)Moderate (X, 500-year)Minimal (X)Undetermined (D)

Shaded areas are FEMA’s mapped flood hazard zones in and around Trousdale County, Tennessee. Zoomed out they are simplified; at street level the map switches to FEMA’s exact layer. Tap anywhere to check that spot, or search an address above.

How Trousdale County floods

Flash flooding from severe weather events dominates the flood character of Trousdale County, accounting for 17 of the 20 recorded flood events over the last 30 years alongside 3 general flood events. Recent regional activity includes a major severe weather and flooding event in February 2025 driven by well-above-average moisture and heavy rainfall, as well as a historic multi-day severe weather event in April 2025 that produced thunderstorms, damaging winds, large hail, and flash flooding. Earlier recorded events, such as a system in March 2018, brought rainfall totals ranging from 1 to nearly 5 inches with accompanying flash flooding.

National Flood Insurance Program claims data indicates that property owners across multiple zones have experienced flood losses. Zone A recorded 10 claims with an average payout of $13,327 and an average recorded water depth of 9 inches. Zone X accounts for 7 claims with an average payout of $12,039 and an average recorded water depth of 0 inches, including 5 claims in shaded areas averaging a $17,445 payout and an average recorded water depth of 45 inches, and 4 claims in unshaded areas averaging an $8,060 payout and an average recorded water depth of 1 inch. Homeowners in Zone A and shaded Zone X areas—where higher average water depths and payouts were recorded—should pay the most attention to flood risk.

Summary written from NOAA storm reports and NFIP claims for this county. Not a prediction.

How deep the water got

outlet80″ door12″24″36″48″60″72″84″

In flood insurance claims here that reported a flood depth, the average was 17 inches.

Drawn to scale against an 80-inch door. Even a few inches soaks flooring, the bottom of the drywall and anything plugged in near the floor.

Average of the depths reported on claims (zero and implausible values left out); FEMA’s record doesn’t say exactly where each depth was measured. Source: OpenFEMA NFIP claims.

Flood claims, year by year

The worst year was 2010, with 11 claims and $163,531 paid, the year of Severe Storms, Flooding, Straight-line Winds, and Tornadoes.

1997: 1 claims1998: 5 claims2000: 2 claims2002: 1 claims2003: 1 claims2010: 11 claims2011: 1 claims2016: 4 claims1980199020002010

Bar height is scaled by square root so ordinary years stay visible next to the worst one. NFIP claims by year of loss. Source: OpenFEMA.

In their words

6 NOAA storm reports from Trousdale County describe what happened, in the words of the forecasters who covered it. Read the Tennessee flood stories →

Federal disasters

13 federal disaster declarations since 1974, 1 of them floods, coastal storms or hurricanes.

DisasterBegan
Severe Winter StormJan 22, 2026
Severe Storms, Straight-line Winds, Tornadoes, And FloodingApr 2, 2025
Severe Storms, Flooding, Straight-line Winds, And TornadoesApr 30, 2010
Severe Storms, Tornadoes, Straight-line Winds, And FloodingFeb 5, 2008
Hurricane Katrina EvacuationAug 29, 2005
Severe Storms, Tornadoes, And FloodingMay 4, 2003
Severe Winter Ice Storm,flash FloodingFeb 9, 1994
Severe Snowfall, Winter StormMar 13, 1993

Weather and water disasters only; most recent first. Source: OpenFEMA Disaster Declarations.

Recorded flood events

20 since 1996: 17 flash floods and 3 river or area floods.

EventDateDamage
Flash FloodFeb 16, 2025—
Flash FloodApr 5, 2025—
Flash FloodApr 3, 2025—
Flash FloodMar 29, 2018$5,000
Flash FloodAug 17, 2018$10,000
Flash FloodOct 2, 2018—
Flash FloodMay 11, 2016$2.0M
Flash FloodJul 7, 2016—

— = no damage estimate in the record. Source: NOAA Storm Events Database.

From the storm reports

Flash Flood · Feb 16, 2025. A major severe weather and flooding event unfolded across Middle Tennessee on February 15-16, 2025. As well above average moisture spread into the area, this helped set the stage for very heavy rainfall across Middle Tennessee. Showers and thunderstorms began early during the day on February 15th, and the primary threat with this first round was flooding. The most significant flooding was reported in Montgomery an…

Flash Flood · Apr 5, 2025. A major and historic multi-day severe weather event unfolded across Middle Tennessee during early April 2025. This event began during the afternoon hours of April 2nd and continued through April 6th. These first couple rounds of thunderstorms brought damaging winds and large hail along with a tornado risk. The corridor from southwest Middle Tennessee into the Nashville metro area was hit particularly hard with mul…

Flash Flood · Apr 3, 2025. A major and historic multi-day severe weather event unfolded across Middle Tennessee during early April 2025. This event began during the afternoon hours of April 2nd and continued through April 6th. These first couple rounds of thunderstorms brought damaging winds and large hail along with a tornado risk. The corridor from southwest Middle Tennessee into the Nashville metro area was hit particularly hard with mul…

Flash Flood · Mar 29, 2018. Moderate to heavy rain spread across Middle Tennessee during the late evening hours on March 28 and continue into the morning hours on March 29. Rainfall totals ranged from around 1 inch up to nearly 5 inches, with a few reports of flash flooding.

National Weather Service narratives, lightly trimmed. Source: NOAA Storm Events Database.

The zones you’ll see on the map

Every colour on the map above is a place on this drawing: where the ground sits relative to the flood FEMA plans for.

Cross-section of a river floodplainDiagram: a river valley. The floodway is the channel and the land beside it; the 1%-annual-chance flood surface (the base flood elevation) covers the valley floor as zone A or AE; a narrow band higher up is shaded X, the 0.2% floodplain; higher ground is X.0.2% CHANCE A YEAR (500-YEAR)BASE FLOOD ELEVATION · 1% A YEARXAEFloodwayAEX
  1. A / AE Inside the 1%-a-year floodplain: about a 26% chance of flooding over a 30-year mortgage. AE has a mapped base flood elevation; plain A does not.
  2. Floodway The channel and the land beside it that has to be kept clear enough to carry the flood. Building here is tightly limited.
  3. X shaded The 0.2% (500-year) floodplain, plus some levee-protected and very shallow flood areas.
  4. X Outside both lines. No federal requirement to insure, which is not the same as no risk.

Every flood zone code explained →

Flood insurance in Trousdale County

If a building in Trousdale County is in a high-risk zone (A or V) and its mortgage comes from a federally regulated or insured lender, or is federally backed, flood insurance is required.

Outside those zones it is optional, and often worth having: from 2014 to 2024 nearly one-third of NFIP claims came from outside the high-risk Special Flood Hazard Area. Since Risk Rating 2.0, NFIP premiums are set for each building, so the only reliable price is a quote: FloodSmart.gov or a local agent.