CO27 Weather Tanner Field

Cortez, ColoradoElevation 6,640 ftSmall airport

OFF-FIELD REFERENCE

Nearest report: KCEZ · 10 NM S · 28 min old

Ceiling 9,500 ft, visibility 10 SM.

No on-field report, so no field flight category. Conditions at the field may differ.

OFF-FIELD REFERENCE · KCEZ

WIND

070@4

steady

VISIBILITY

10 SM

16.1 km

CEILING

9,500 ft

lowest BKN/OVC

ACTIVE NWS ALERTS

Active weather alerts

Flood WatchSevere · Future · Possible

25 1405Z to 26 0600Z

Northwestern San Juan Mountains; Southwest San Juan Mountains; Four Corners/Upper Dolores River; Animas River Basin; San Juan River Basin; Southeast Utah

* WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of southwest Colorado, including the following areas, Animas River Basin, Four Corners/Upper Dolores River, San Juan River Basin and Southwest San Juan Mountains and Utah, including the following areas, Arches/Grand Flat, Canyonlands/Natural Bridges, La Sal and Abajo Mountains and Southeast Utah. * WHEN..…

You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.

Alerts from the National Weather Service. For situational awareness only; always confirm against an official briefing.

FORECAST & PILOT NOTES · SUPPLEMENTAL

Extended forecast and pilot notes

No aviation METAR is published for this airport. The nearest National Weather Service station reports wind from 70° at 4 kt, visibility 10 SM, temperature 6C. Treat this as supplemental, not an aviation observation. Forecast suggests tonight mostly clear, low near 34F, 5% chance of precipitation. Key risks: thunderstorms in the forecast.

PILOT WEATHER NOTES

Thunderstorms in the forecastWeather.gov

Friday: Showers And Thunderstorms Likely. Watch for developing convection and plan alternates.

Day	Conditions	Temp F	Wind	Gusts	Precip	Pilot note
Tonight	Mostly Clear	34	NE 4 kt	–	5%
Monday	Sunny	54/34	SE 4 kt	–	0%
Tuesday	Sunny	57/37	SSE 9 kt	22 kt	0%
Wednesday	Sunny	57/38	SSE 9 kt	–	0%
Thursday	Mostly Sunny	59/41	SE 13 kt	–	26%
Friday	Showers And Thunderstorms Likely	54/40	SSE 9 kt	–	88%	Thunderstorms in the forecast
Saturday	Rain Showers Likely	50/39	S 9 kt	–	56%
Sunday	Showers And Thunderstorms	48	SE 13 kt	–	84%

Source: National Weather Service (office GJT). Forecast issued 0420Z.

Radar

Radar data: NOAA/NWS MRMS composite reflectivity. For situational awareness only, not a substitute for an official weather briefing.

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RUNWAYS & WIND

Crosswind calculator

No runway layout is available for CO27. Enter a runway number or heading to estimate wind components.

RUNWAYS

Runway detail & declared distances

1 runway · longest 2,200 ft

N/S

Dimensions

2,200 x 40 ft

Surface

Dirt

RWY N

Traffic patternLeft

RWY S

Traffic patternLeft

Runway data from the FAA NASR dataset (effective 2026-06-11). Verify with the current Chart Supplement and NOTAMs.

FIELD CONDITIONS

Field elevation

6,640 ft MSL

Density and pressure altitude need a current temperature and altimeter from the METAR.

DAYLIGHT & NIGHT

Sun & logging windows

Sunset

0024Z 6:24 PM

Sunrise

1333Z 7:33 AM

Loggable night

0051Z (6:51 PM local) → 1306Z (7:06 AM local)

end of evening to start of morning civil twilight

Position lights required

0024Z (6:24 PM local) → 1333Z (7:33 AM local)

sunset to sunrise (91.209)

Night passenger currency

0124Z (7:24 PM local) → 1233Z (6:33 AM local)

1 hr after sunset to 1 hr before sunrise (61.57(b))

FAA definitions, shown in Zulu with airport-local time. Verify for your operation.

AIRPORT INFORMATION

Facility & services

Tanner Field is in Cortez, Colorado. Field elevation 6,640 ft MSL. Airport facts are drawn from OurAirports and the FAA NASR dataset.

OPERATIONS & CONTACT

OwnershipPrivately owned

UsePrivate use

TypeSmall airport

AttendedUNATNDD

CHARTS & AIRSPACE

ICAO / IATACO27

SectionalDENVER

Center (ARTCC)DENVER

Flight service (AFSS)DENVER

RegionColorado

CountryUnited States

Coordinates37.4678, -108.6650

Distance from city8 NM N

SERVICES & LIGHTING

Control towerNon-towered

AIRCRAFT ACTIVITY

CO27 traffic patterns

2026-07-02 to 2026-07-12, 2 days observed · data 2026-10-23

Insufficient confidence

TRAFFIC VOLUME (30-DAY)

AVG LANDINGS/DAY

AVG OPS/DAY

Operations trend (2 days)

Busiest day: Thu · Busiest month: Jul

FLEET MIX

Mostly rotorcraft.

TOP AIRCRAFT TYPES

›AS50 (Helicopter) · ~0 landings/mo

›H60 (Helicopter) · ~0 landings/mo

Data limitations (4)

›ADS-B coverage is incomplete; counts are an observed lower bound, not official totals.

›Some aircraft do not transmit usable ADS-B and are not counted.

›Aircraft types and based estimates are inferred and may be wrong.

›This is not official ATC, FAA, or airport data.

NEARBY AIRPORTS

Weather reference stations

CO27 has no on-field report. Nearest reporting station: KCEZ (10 NM S, VFR).

KCEZ Cortez Municipal Airport

10 NM S

VFR

KBDG Blanding Municipal Airport

40 NM W

VFR

KTEX Telluride Regional Airport

46 NM NE

VFR

KDRO Durango La Plata County Airport

47 NM SE

VFR

KFMN Four Corners Regional Airport

48 NM SE

VFR

KMTJ Montrose Regional Airport

72 NM NE

VFR

AIRPORT REMARKS

Operational remarks

›FOR CD CTC DENVER ARTCC AT 303-651-4257.

OFFICIAL LINKS & SOURCES

↗Search NOTAMs (official FAA NOTAM Search)

↗CO27 on OurAirports

FREQUENTLY ASKED

Does CO27 have a METAR?

No on-field METAR is issued for CO27. This page uses the nearest reporting station as a reference.

Does CO27 have a TAF?

No TAF is issued directly for CO27. Use the nearest TAF-issuing field as a planning reference.

What is the field elevation at CO27?

CO27 sits at 6,640 ft MSL, which factors into the density-altitude estimate on this page.

Is this an official preflight weather briefing for CO27?

No. wxdecoder.com is for education and situational awareness only. It is not an official weather briefing or a substitute for official sources, NOTAM review, and pilot judgment.

This app is for aviation weather education, training, and situational awareness only. It is not a substitute for an official weather briefing, approved flight-planning software, flight service, dispatch procedures, current FAA regulations, or pilot judgment. Always verify weather with official sources before flight.