FEMA flood zones · Colorado

Phillips County, Colorado Flood Zone Map

2 flood insurance claims·$7,402 paid·2 federal flood & hurricane disasters

Less than 1% of Phillips 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 Phillips County, Colorado. 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 Phillips County describe what happened, in the words of the forecasters who covered it. Read the Colorado flood stories →

Federal disasters

6 federal disaster declarations since 1965, 2 of them floods, coastal storms or hurricanes.

DisasterBegan
Hurricane Katrina EvacuationAug 29, 2005
Severe Winter StormsApr 11, 2001
Severe Storms, Heavy Rain, Flash Floods, Flooding, MudslidesJul 28, 1997
Tornadoes, Severe Storms & FloodingJun 19, 1965

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

Recorded flood events

14 since 1996: 12 flash floods and 2 river or area floods.

EventDateDamage
FloodApr 27, 2021$5,000
Flash FloodAug 19, 2021$25,000
Flash FloodJun 11, 2010$25,000
Flash FloodJun 1, 2009$30,000
FloodJun 12, 2007—
Flash FloodJun 12, 2007$100,000
Flash FloodAug 7, 2006—
Flash FloodAug 19, 2005—

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

From the storm reports

Flood · Apr 27, 2021. Severe thunderstorms developed across portions of Adams, Elbert, and Lincoln counties. Hail from quarter to ping pong ball size was observed. Near Limon and Messex, the hail completely covered the roadways. Two tornados also touched down briefly in Lincoln County but no damage was observed. Very heavy rain developed across the northeast plains. The heavy rain caused small stream flooding across southeast Loga…

Flash Flood · Aug 19, 2021. Severe thunderstorms produced intense winds and large hail across Adams, Broomfield, Douglas, Jefferson, Morgan, Weld and Phillips counties. The hail ranged in size from one to two inches in diameter. Three short-lived brief tornadoes touched down in Phillips County. One caused moderate damage, when it destroyed two outbuildings and rolled over a semi-trailer. Very heavy rainfall in southeast Phillips County,…

Flash Flood · Jun 11, 2010. A large complex of thunderstorms swept across Northeast Colorado producing very large damaging hail, intense thunderstorm winds as well as a couple of weak tornadoes. Large hail, from 1 to 3 inches in diameter, caused extensive damage to cropland, homes and vehicles. In southeast Weld County, 50,000 acres of cropland was pummelled. The combination of heavy rain and hail produced flash flooding over parts of Phi…

Flash Flood · Jun 1, 2009. A severe thunderstorm over Phillips County produced very heavy rain, which resulted in flash flooding near Holyoke. Heavy rain and minor flooding was also observed in Castlewood Canyon, east of Castle Rock.

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 Phillips County

If a building in Phillips 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.