FEMA flood zones · Nevada

Storey County, Nevada Flood Zone Map

10 flood insurance claims·$36,034 paid·3 federal flood & hurricane disasters

1% of Storey County’s area is in FEMA’s high-risk flood zones.

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 Storey County, Nevada. 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 Storey County floods

Flash flooding from summer thunderstorms and heavy monsoon moisture dominates the flood risks in Storey County, Nevada. Over the last 30 years, the NOAA Storm Events Database recorded 11 flash flood events and 7 general flood events, which included 2 deaths. Recent activity includes widespread heavy precipitation driven by monsoon moisture, such as flash floods occurring in August 2025. Other flood events are linked to winter weather transitions, such as a March 2023 storm that combined heavy, wet snow at higher elevations with heavy rainfall that increased flooding risks for lower-elevation creeks and streams.

Federal flood insurance claims data shows payouts across different zones. Properties in Zone X (unshaded) account for 6 claims with an average payout of $4,614 and an average recorded water depth of 2 inches. Properties in Zone A account for 4 claims with an average payout of $7,397 and an average recorded water depth of 2 inches.

Homeowners, real estate agents, and journalists should pay the closest attention to properties near lower-elevation creeks and streams, as well as homes located within designated Zone A and unshaded Zone X areas where past claims and localized water depths have been documented.

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 2 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 1995, with 5 claims and $9,855 paid.

1995: 5 claims1997: 2 claims2005: 1 claims2006: 2 claims198019902000

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

5 NOAA storm reports from Storey County describe what happened, in the words of the forecasters who covered it. Read the Nevada flood stories →

Federal disasters

13 federal disaster declarations since 1965, 3 of them floods, coastal storms or hurricanes.

DisasterBegan
Severe Winter Storms, Flooding, Landslides, And MudslidesMar 8, 2023
Severe Winter Storms, Flooding, And MudslidesFeb 5, 2017
Severe Winter Storms, Flooding, And MudslidesJan 5, 2017
Linehan Fire ComplexJun 26, 2006
Severe Storms And FloodingDec 31, 2005
Hurricane Katrina EvacuationAug 29, 2005
SnowJan 6, 2005
Record And/or Near Record SnowDec 29, 2004

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

Recorded flood events

18 since 1996: 11 flash floods and 7 river or area floods.

EventDateDamage
Flash FloodAug 27, 2025—
Flash FloodAug 26, 2025—
FloodMar 9, 2023—
Flash FloodJul 26, 2019—
FloodJan 8, 2017$50,000
FloodJan 8, 2017$350,000
Flash FloodJul 6, 2015$10,000
Flash FloodAug 8, 2010$5,000

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

From the storm reports

Flash Flood · Aug 27, 2025. A high amount of atmospheric moisture in the region interacted with a short-wave trough, allowing for widespread heavy precipitation. This was day five of an extended push of monsoon moisture that produced heavy rain, localized flooding, strong outflow winds.

Flash Flood · Aug 26, 2025. A high amount of atmospheric moisture in the region interacted with a short-wave trough, allowing for widespread heavy precipitation. This was day four of an extended push of monsoon moisture that produced heavy rain, localized flooding, strong outflow winds.

Flood · Mar 9, 2023. Strong, even damaging west-southwest winds increased travel hazards especially to high profile trucks but also increased the danger for destructive avalanches across the region. Snow started at all elevations Thursday evening with snow levels rapidly rising Friday morning. Heavy, wet snow (Sierra Nevada Cement) fell across higher elevation areas as snow levels rose to 7000 feet over the region. Heavy rainfall in…

Flash Flood · Jul 26, 2019. Moisture from the eastern Pacific Ocean and the Gulf of California moved northward around the periphery of high pressure centered over the Four-Corners region of the Rockies the 24th into the 25th. This moisture, coupled with the weak flow and increased instability in the lower to middle portions of the atmosphere, resulted in storms producing heavy rains.

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 Storey County

If a building in Storey 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.