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FEMA flood zones · Wyoming

Sublette County, Wyoming Flood Zone Map

7 flood insurance claims·$0 paid

Less than 1% of Sublette 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 Sublette County, Wyoming. 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.

In their words

4 NOAA storm reports from Sublette County describe what happened, in the words of the forecasters who covered it. Read the Wyoming flood stories →

Federal disasters

4 federal disaster declarations since 1977.

DisasterBegan
Roosevelt FireSep 18, 2018
DroughtJun 15, 1977

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

Recorded flood events

11 since 1996: 5 flash floods and 6 river or area floods.

EventDateDamage
Flash FloodJul 22, 2018—
Flash FloodMar 12, 2017—
FloodMar 12, 2017—
FloodJun 5, 2017—
FloodJul 1, 2011$50,000
FloodJul 1, 2011—
Flash FloodAug 17, 2007$10,000
Flash FloodJun 27, 2004—

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

From the storm reports

Flash Flood · Jul 22, 2018. Rains from thunderstorms and a clogged culvert allowed water to flow across Highway 189 around 6 miles north of Labarge. After the clog was removed, the water receded and the highway reopened.

Flash Flood · Mar 12, 2017. Rapid snow melt caused by warming temperatures produced flooding in portions of Sublette County. There was flooding in the normally flood prone areas around LaBarge where water rose into a couple of houses basements. In addition, high water closed portions of Highway 372 between Mile Markers 40 and 48 for a couple of days. The water receded the morning on March 14th.

Flood · Mar 12, 2017. Rapid snow melt caused by warming temperatures produced flooding in portions of Sublette County. There was flooding in the normally flood prone areas around LaBarge where water rose into a couple of houses basements. In addition, high water closed portions of Highway 372 between Mile Markers 40 and 48 for a couple of days. The water receded the morning on March 14th.

Flood · Jun 5, 2017. Warming temperatures in June brought rapid snow melt of mountain snow pack and led to flooding around portions of Sublette County, especially along the New Fork and Green Rivers as well as some of it's tributaries. Several low lying BLM roads were damaged or washed out during the flooding, with some roads having over 2 feet of water on them. In addition, many low lying areas had several days of flooding. However,…

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 Sublette County

If a building in Sublette 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.