FEMA flood zones · Idaho

Clearwater County, Idaho Flood Zone Map

8 flood insurance claims·$36,548 paid·4 federal flood & hurricane disasters

FEMA’s digital flood map shows no high- or moderate-risk zones in Clearwater County. That can mean the area was never studied in detail or has no digital map, not that it can’t flood; the county floodplain administrator can say which.

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 Clearwater County, Idaho. 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 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 3 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 1996, with 3 claims and $3,271 paid, the year of Severe Storms and Flooding and Severe Storms, Flooding, Mud and Landslides.

1982: 2 claims1996: 3 claims2005: 1 claims2008: 1 claims2009: 1 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.

Federal disasters

13 federal disaster declarations since 1964, 4 of them floods, coastal storms or hurricanes.

DisasterBegan
Severe Storms, Flooding, Landslides, And MudslidesMar 6, 2017
Municipal FireAug 14, 2015
Flooding, Landslides, And MudslidesMar 31, 2011
Hurricane KatrinaAug 29, 2005
WildfiresJul 27, 2000
Severe Storms, Flooding, Mud And LandslidesNov 16, 1996
Severe Storms And FloodingFeb 6, 1996
Volcanic Eruption, Mt. St. HelensMay 22, 1980

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

Recorded flood events

13 since 1996: 1 flash floods and 12 river or area floods.

EventDateDamage
FloodApr 7, 2018$5,000
FloodMar 16, 2017$3.0M
Flash FloodDec 23, 2005$15,000
FloodJan 31, 2003—
FloodMar 9, 2003$5,000
FloodFeb 1, 2003—
FloodApr 14, 2002—
FloodMay 15, 1997—

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

From the storm reports

Flood · Apr 7, 2018. A combination of moderate to heavy rainfall ahead and along a cold front brought flooding and wind damage to portions of central Idaho.

Flood · Mar 16, 2017. An atmospheric river brought several inches of rainfall to central Idaho which was already soaked from previous rains. This contributed to mudslides that shut down roads and flooding that affected residences and property.

Flash Flood · Dec 23, 2005. Water backing up behind an ice jam on the upper portion of Orofino Creek broke and caused a flash flood event to occur along the banks of Orofino Creek. 3 homes and a barn along the creek were impacted by the flood waters. One home had flood damage in the basement.

Flood · Jan 31, 2003. Heavy rainfall and snow melt lead to Pierce city officials to release water from a fresh water reservoir, resulting in flooding along Orofino Creek in Clearwater County. Two roads were closed near Weippe and many other roads experienced some water problems. Sandbagging was done to protect personal property in the region.

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 Clearwater County

If a building in Clearwater 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.