FEMA flood zones · Michigan

Ogemaw County, Michigan Flood Zone Map

Less than 1% of Ogemaw 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 Ogemaw County, Michigan. 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

1 NOAA storm reports from Ogemaw County describe what happened, in the words of the forecasters who covered it. Read the Michigan flood stories →

Federal disasters

6 federal disaster declarations since 1977.

DisasterBegan
Hurricane Katrina EvacuationAug 29, 2005
Mi - Severe Weather 1/2 /99Jan 2, 1999
Blizzards & SnowstormsJan 27, 1978
DroughtMar 2, 1977

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

Recorded flood events

4 since 1996: 2 flash floods and 2 river or area floods.

EventDateDamage
FloodMay 18, 2020$450,000
Flash FloodJun 12, 2010$150,000
FloodSep 26, 2005—
Flash FloodMay 9, 2004—

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

From the storm reports

Flood · May 18, 2020. A very slow moving low pressure system advanced east from the central Plains. Unusually deep moisture was pushed northward into the Great Lakes region, ahead of this low. Multiple rounds of heavy rain fell in parts of northern lower Michigan on the 17th and 18th. This heavy rain targeted east central and northeast lower Michigan in particular. Rainfall amounts of 2 to 4 inches were common by the morning of the 18t…

Flash Flood · Jun 12, 2010. Slow moving thunderstorms produced flash flooding in northern Ogemaw County.

Flood · Sep 26, 2005. Persistent rain and embedded thunderstorms produced heavy rain in parts of central Lower Michigan. An observer in St Helen reported 5.79 inches of rain in the 24 hours preceding 8 am EDT on the 26th. Five inches of rain fell on Lupton, with 3.66 inches in Gladwin. The West Branch of the Rifle River rose out of its banks near the city of West Branch, though no property damage was reported. Significant flooding…

Flash Flood · May 9, 2004. A warm front was moving slowly north into Lower Michigan. Thunderstorms developed repeatedly north of the warm front, dropping up to 2 inches of rain in less than an hour in spots. Isolated flooding and flash flooding resulted, with more widespread flooding in southern Gladwin County.

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 Ogemaw County

If a building in Ogemaw 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.