Osan Air Base

RKSO / OSN

Pyeongtaek, KR

Current TAF Forecast

Raw TAF:
TAF RKSO 040500Z 0405/0511 VRB06KT 9000 HZ FEW050 QNH3032INS BECMG 0415/0416 VRB06KT 8000 BR SKC QNH3027INS BECMG 0423/0424 VRB06KT 9999 NSW SKC QNH3021INS TX16/0405Z TN04/0418Z

Detailed TAF Table

Parameter
Tue
11:00Z
+-1h
Tue
12:00Z
+0h
Tue
13:00Z
+1h
Tue
14:00Z
+2h
Tue
15:00Z
+3h
Tue
16:00Z
+4h
Tue
17:00Z
+5h
Tue
18:00Z
+6h
Tue
19:00Z
+7h
Tue
20:00Z
+8h
Tue
21:00Z
+9h
Tue
22:00Z
+10h
Tue
23:00Z
+11h
Wed
00:00Z
+12h
Wed
01:00Z
+13h
Wed
02:00Z
+14h
Wed
03:00Z
+15h
Wed
04:00Z
+16h
Wed
05:00Z
+17h
Wed
06:00Z
+18h
Wed
07:00Z
+19h
Wed
08:00Z
+20h
Wed
09:00Z
+21h
Wind Dir
VRB
VRB
VRB
VRB
VRB
VRB
VRB
VRB
VRB
VRB
VRB
VRB
VRB
VRB
VRB
VRB
VRB
VRB
VRB
VRB
VRB
VRB
VRB
Wind Speed
6kt
6kt
6kt
6kt
6kt
6kt
6kt
6kt
6kt
6kt
6kt
6kt
6kt
6kt
6kt
6kt
6kt
6kt
6kt
6kt
6kt
6kt
6kt
Visibility
9 km
9 km
9 km
9 km
8 km
8 km
8 km
8 km
8 km
8 km
8 km
8 km
10+ km
10+ km
10+ km
10+ km
10+ km
10+ km
10+ km
10+ km
10+ km
10+ km
10+ km
Weather
Haze
HZ
Haze
HZ
Haze
HZ
Haze
HZ
Mist
BR
Mist
BR
Mist
BR
Mist
BR
Mist
BR
Mist
BR
Mist
BR
Mist
BR
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
Clouds
FEW050
FEW050
FEW050
FEW050
CLR
CLR
CLR
CLR
CLR
CLR
CLR
CLR
CLR
CLR
CLR
CLR
CLR
CLR
CLR
CLR
CLR
CLR
CLR
Ceiling
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
Flight Rules VFR VFR VFR VFR MVFR MVFR MVFR MVFR MVFR MVFR MVFR MVFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR
Day/Night
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
🌇 17:10
☀️
Day
🌇 17:10
☀️
Day
🌇 17:10
🌙
Night
🌇 17:10
🌙
Night
🌇 17:10
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌅 06:50
🌙
Night
🌅 06:50
🌙
Night
🌅 06:50
☀️
Day
🌅 06:50
☀️
Day
🌅 06:50
☀️
Day
Flight Rules
VFR: Visual Flight Rules
MVFR: Marginal VFR
IFR: Instrument Flight Rules
LIFR: Low IFR
Ceiling Colors
Red: < 500ft
Amber: 500-1000ft
Blue: 1000-3000ft
Green: > 3000ft
⛈️ TCU: Towering Cumulus
🌩️ CB: Cumulonimbus
+Nh: Hours from now%: Probability of occurrenceAGL: Above Ground Level

Forecast Periods

BASE
VFR
Wind
VRB° at 6 kt
Visibility
9 km
Weather
Haze
Clouds
FEW050
📖 Plain English Explanation:

This is the base forecast condition. Winds will be variable in direction at 6kt. Visibility will be good at 9 km. Weather conditions: Haze. Few clouds at 5000 feet. Conditions will be suitable for Visual Flight Rules (VFR) operations.

BECMG 2025-11-04 15:00:00 - 2025-11-04 16:00:00
MVFR
Wind
VRB° at 6 kt
Visibility
8 km
Weather
Mist
Clouds
CLR
📖 Plain English Explanation:

Conditions will gradually change to become: Winds will be variable in direction at 6kt. Visibility will be good at 8 km. Weather conditions: Mist. Skies will be clear. Marginal VFR conditions - some restrictions for visual flying.

BECMG 2025-11-04 23:00:00 - 2025-11-05 00:00:00
VFR
Wind
VRB° at 6 kt
Visibility
10+ km
Clouds
CLR
📖 Plain English Explanation:

Conditions will gradually change to become: Winds will be variable in direction at 6kt. Visibility will be excellent at 10+ km. Skies will be clear. Conditions will be suitable for Visual Flight Rules (VFR) operations.

📚 Understanding TAF Forecasts

Terminal Aerodrome Forecast (TAF) provides detailed weather forecasts specifically for aviation operations. Our system translates complex meteorological codes into plain English to help pilots of all experience levels understand forecasted conditions.

What TAF Includes:

  • • Wind direction, speed, and gusts
  • • Visibility in statute miles or kilometers
  • • Weather phenomena (rain, snow, fog, thunderstorms)
  • • Cloud coverage types and altitudes
  • • Forecast changes with timing
  • • Flight rules categories (VFR/IFR)

Change Indicators Explained:

  • BASE - Main forecast conditions
  • FM - Permanent change from specific time
  • BECMG - Gradual change over 2-4 hours
  • TEMPO - Temporary changes (less than 1 hour)
  • PROB30/40 - 30% or 40% probability

🛩️ Flight Rules Categories

VFR

Visual Flight Rules

  • • Ceiling ≥ 3000 ft
  • • Visibility ≥ 5 miles
  • • Good for visual flying

MVFR

Marginal VFR

  • • Ceiling 1000-3000 ft
  • • Visibility 3-5 miles
  • • Caution for VFR

IFR

Instrument Flight Rules

  • • Ceiling 500-1000 ft
  • • Visibility 1-3 miles
  • • Instruments required

LIFR

Low IFR

  • • Ceiling < 500 ft
  • • Visibility < 1 mile
  • • Challenging conditions

💡 TAF Reading Tips

For Student Pilots:

  • • Focus on the plain English explanations above
  • • Pay attention to flight rules categories
  • • Look for wind direction relative to runway headings
  • • Check for temporary conditions (TEMPO)

For Experienced Pilots:

  • • Cross-reference with raw TAF for precise timing
  • • Consider probability forecasts for alternate planning
  • • Monitor BECMG periods for gradual changes
  • • Always check current METAR vs TAF forecast

Important: TAF forecasts should always be supplemented with current METAR observations, PIREPs, and other weather information for complete situational awareness. Weather can change rapidly, and forecasts have inherent limitations.