RKSO/OSN METAR & TAF Osan Air Base

Pyeongtaek, Gyeonggi-do (Gyeonggi Province)Elevation 38 ftMedium airport

CURRENT STATUS

VFR59 min old

No ceiling, visibility 10 SM.

FLIGHT CATEGORY

VFR

ceiling & visibility

WIND

330@5

steady

VISIBILITY

10 SM

16.1 km

CEILING

None

no BKN/OVC layer

DENSITY ALT

-1,016 ft

-1,054 ft vs field

CURRENT METAR

Decoded observation

Observed 1255Z (9:55 PM local) · 59 min old

RKSO is currently VFR. Winds are from the northwest at 5 knots. Visibility is 10 statute miles. There is no ceiling.

WIND

330° at 5 kt

Steady.

VISIBILITY

10 statute miles

16.1 km, good.

CEILING & SKY

CLR

FEW and SCT layers are not ceilings.

TEMP / DEWPOINT

9°C / -3°C

48°F / 27°F. 12°C spread.

ALTIMETER

30.27 inHg

1025.1 hPa, above standard.

WEATHER & HAZARDS

No significant hazards

No precipitation or obscuration reported.

Codes in this report: AUTO CLR RMK AO2

Hover or tap any group for a plain-English explanation.

REMARKS: DECODED

AO2

automated station with a precipitation discriminator (can tell rain from snow)

SLP254

sea-level pressure 1025.4 hPa

T00891030

precise temperature 8.9°C, dew point -3.0°C

FZRANO

freezing-rain sensor not operating

station needs maintenance

TERMINAL AERODROME FORECAST

TAF timeline

Issued 1300Z (10:00 PM local) · valid to 1900Z (4:00 AM local)

RKSO forecast starts VFR at 13Z. Conditions are roughly steady over the period.

Maximum temperature 12°C expected at 0600Z on day 28.
Minimum temperature 3°C expected at 2200Z on day 27.

VFR

1300Z10:00 PM1900Z4:00 AM0100Z10:00 AM0700Z4:00 PM1300Z10:00 PM1900Z4:00 AM

Codes in this report: 9999 SKC

Tap any group to decode it.

SUGGESTED RISK · TRAINING USE

Suggested risk level: Low

›No significant weather concerns in the current report.

A suggested risk level for training and situational awareness only, not a go/no-go authority. Verify with official sources and apply your personal minimums.

FORECAST & PILOT NOTES · SUPPLEMENTAL

Pilot weather notes

Current aviation conditions show flight category VFR, wind from 330° at 5 kt, visibility 10 SM, ceiling none. No extended National Weather Service forecast is available for this location. Key risks: no significant hazards are highlighted right now, but always confirm against an official briefing.

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RUNWAYS & WIND

2 runways · crosswind ranking

ON-FIELD METAR

READING THE BARB · SWIPE FOR MORE →

Calm

5 kt

10 kt

15 kt

20 kt

25 kt

30 kt

35 kt

40 kt

45 kt

50 kt

65 kt

75 kt

100 kt

105 kt

Half feather = 5 kt, full = 10 kt, filled pennant = 50 kt; add them up. The staff points the direction the wind blows from.

WIND USED

330° at 5 kt

Components computed from the current on-field METAR wind.

RECOMMENDED

RWY 27R2 kt headwind · 5 kt crosswind

RUNWAYS BY WIND · best end

27R

HEAD

2 kt

CROSS

5 kt R

BEST

27L

HEAD

2 kt

CROSS

5 kt R

09L

HEAD

2 kt tail

CROSS

5 kt L

09R

HEAD

2 kt tail

CROSS

5 kt L

Components are estimates from the current METAR wind and runway heading. Verify with the Chart Supplement and NOTAMs.

RUNWAYS

Runway detail

09L/27R

Dimensions

9,004 x 150 ft

Surface

CON

Lighting

Lighted

09R/27L

Dimensions

9,004 x 150 ft

Surface

CON

Lighting

Lighted

FIELD CONDITIONS

Performance & density altitude

Density altitude

-1,016 ft

Pressure altitude

-312 ft

Field elevation

38 ft MSL

Temperature

9°C (48°F)

Dewpoint

-3°C (27°F)

Altimeter

30.27 inHg

Density altitude estimates how the aircraft performs versus standard atmosphere. Higher density altitude reduces climb performance and increases takeoff distance.

DAYLIGHT & NIGHT

Sun & logging windows

Sunset

0840Z 5:40 PM

Sunrise

2151Z 6:51 AM

Loggable night

0907Z (6:07 PM local) → 2124Z (6:24 AM local)

end of evening to start of morning civil twilight

Position lights required

0840Z (5:40 PM local) → 2151Z (6:51 AM local)

sunset to sunrise (91.209)

Night passenger currency

0940Z (6:40 PM local) → 2051Z (5:51 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

Osan Air Base is in Pyeongtaek, Gyeonggi-do (Gyeonggi Province). Field elevation 38 ft MSL. Airport facts are drawn from OurAirports and the FAA NASR dataset.

OPERATIONS & CONTACT

TypeMedium airport

CHARTS & AIRSPACE

ICAO / IATARKSO / OSN

RegionGyeonggi-do (Gyeonggi Province)

CountrySouth Korea

Coordinates37.0915, 127.0294

SERVICES & LIGHTING

Control towerTowered

FREQUENCIES

Communications

127.9

APP

132.125

ATIS

127.3

CLNC DEL

CLD

127.9

DEP

132.45

GND

34.65

PMSV METRO

PMSV

120.7

PTD

122.1

TWR

Not all tower/ground/approach frequencies are in our datasets. Verify with the FAA Chart Supplement.

AIRCRAFT ACTIVITY

Traffic patterns

Aircraft activity data is not available for this airport yet.

NEARBY AIRPORTS

Weather reference stations

Current flight category at nearby reporting stations.

RKSG Camp Humphreys (A-511) Desiderio Army Airfield

8 NM S

VFR

RKSS Gimpo International Airport

30 NM N

VFR

RKTU Cheongju International Airport/Cheongju Air Base (K-59/G-513)

32 NM SE

VFR

RKSI Incheon International Airport

36 NM NW

VFR

RKJK Gunsan Airport / Gunsan Air Base

74 NM S

VFR

RKNY Yangyang International Airport

97 NM NE

VFR

OFFICIAL LINKS & SOURCES

↗Official METAR on AviationWeather.gov

↗Wikipedia

↗RKSO on OurAirports

FREQUENTLY ASKED

Does RKSO have a METAR?

Yes. RKSO has a current METAR observation, decoded into plain English on this page.

Does RKSO have a TAF?

Yes, a TAF is issued for RKSO; the decoded forecast timeline is shown above.

What is the field elevation at RKSO?

RKSO sits at 38 ft MSL, which factors into the density-altitude estimate on this page.

Is this an official preflight weather briefing for RKSO?

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.