Tainan International Airport / Tainan Air Base

RCNN / TNN

Tainan (Rende), TW

Current TAF Forecast

Raw TAF:
TAF RCNN 222300Z 2300/2324 14004KT 9999 FEW012 SCT040 BKN100 TX28/2305Z TN23/2320Z BECMG 2301/2304 24008KT TEMPO 2306/2311 8000 -RA FEW010 BKN025 BKN050 BECMG 2314/2317 14004KT 6000 -RA FEW008 BKN020 BKN040 TEMPO 2318/2323 9999 FEW010 BKN040

Detailed TAF Table

Parameter
Thu
00:00Z
+-1h
Thu
01:00Z
+0h
Thu
02:00Z
+1h
Thu
03:00Z
+2h
Thu
04:00Z
+3h
Thu
05:00Z
+4h
Thu
06:00Z
+5h
Thu
07:00Z
+6h
Thu
08:00Z
+7h
Thu
09:00Z
+8h
Thu
10:00Z
+9h
Thu
11:00Z
+10h
Thu
12:00Z
+11h
Thu
13:00Z
+12h
Thu
14:00Z
+13h
Thu
15:00Z
+14h
Thu
16:00Z
+15h
Thu
17:00Z
+16h
Thu
18:00Z
+17h
Thu
19:00Z
+18h
Thu
20:00Z
+19h
Thu
21:00Z
+20h
Thu
22:00Z
+21h
Wind Dir
140°
SE
240°
SW
240°
SW
240°
SW
240°
SW
240°
SW
140°
SE
140°
SE
140°
SE
140°
SE
140°
SE
240°
SW
240°
SW
240°
SW
140°
SE
140°
SE
140°
SE
140°
SE
140°
SE
140°
SE
140°
SE
140°
SE
140°
SE
Wind Speed
4 kt
8 kt
8 kt
8 kt
8 kt
8 kt
4 kt
4 kt
4 kt
4 kt
4 kt
8 kt
8 kt
8 kt
4 kt
4 kt
4 kt
4 kt
4 kt
4 kt
4 kt
4 kt
4 kt
Visibility
10+ km
10+ km
10+ km
10+ km
10+ km
10+ km
8 km
8 km
8 km
8 km
8 km
10+ km
10+ km
10+ km
6 km
6 km
6 km
6 km
10+ km
10+ km
10+ km
10+ km
10+ km
Weather
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
Light Rain
-RA
Light Rain
-RA
Light Rain
-RA
Light Rain
-RA
Light Rain
-RA
☀️ Clear
☀️ Clear
☀️ Clear
Light Rain
-RA
Light Rain
-RA
Light Rain
-RA
Light Rain
-RA
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
Clouds
FEW012
SCT040
☀️ CLR
☀️ CLR
☀️ CLR
☀️ CLR
☀️ CLR
FEW010
BKN025
FEW010
BKN025
FEW010
BKN025
FEW010
BKN025
FEW010
BKN025
☀️ CLR
☀️ CLR
☀️ CLR
FEW008
BKN020
FEW008
BKN020
FEW008
BKN020
FEW008
BKN020
FEW010
BKN040
FEW010
BKN040
FEW010
BKN040
FEW010
BKN040
FEW010
BKN040
Ceiling
10,000 ft
AGL
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
2,500 ft
AGL
2,500 ft
AGL
2,500 ft
AGL
2,500 ft
AGL
2,500 ft
AGL
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
2,000 ft
AGL
2,000 ft
AGL
2,000 ft
AGL
2,000 ft
AGL
4,000 ft
AGL
4,000 ft
AGL
4,000 ft
AGL
4,000 ft
AGL
4,000 ft
AGL
Flight Rules VFR VFR VFR VFR VFR VFR MVFR MVFR MVFR MVFR MVFR VFR VFR VFR MVFR MVFR MVFR MVFR VFR VFR VFR VFR VFR
Day/Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌅 05:36Z
🌙
Night
🌅 05:36Z
🌙
Night
🌅 05:36Z
☀️
Day
🌅 05:36Z
☀️
Day
🌅 05:36Z
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
🌇 18:23Z
☀️
Day
🌇 18:23Z
☀️
Day
🌇 18:23Z
🌙
Night
🌇 18:23Z
🌙
Night
🌇 18:23Z
🌙
Night
🌙
Night
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
140° at 4 kt
Visibility
10+ km
Clouds
FEW012 SCT040 BKN100
📖 Plain English Explanation:

This is the base forecast condition. Winds from the Southeast (140°) at 4 kt. Visibility will be excellent at 10+ km. Few clouds at 1200 feet, Scattered clouds at 4000 feet, Broken clouds at 10000 feet. Conditions will be suitable for Visual Flight Rules (VFR) operations.

BECMG 01:00Z - 04:00Z
VFR
Wind
240° at 8 kt
📖 Plain English Explanation:

Conditions will gradually change to become: Winds from the West-Southwest (240°) at 8 kt. Conditions will be suitable for Visual Flight Rules (VFR) operations.

TEMPO 06:00Z - 11:00Z
MVFR
Visibility
8 km
Weather
Light Rain
Clouds
FEW010 BKN025 BKN050
📖 Plain English Explanation:

Temporary conditions (lasting less than an hour at a time) may include: Visibility will be good at 8 km. Weather conditions: Light Rain. Few clouds at 1000 feet, Broken clouds at 2500 feet, Broken clouds at 5000 feet. Marginal VFR conditions - some restrictions for visual flying.

BECMG 14:00Z - 17:00Z
MVFR
Wind
140° at 4 kt
Visibility
6 km
Weather
Light Rain
Clouds
FEW008 BKN020 BKN040
📖 Plain English Explanation:

Conditions will gradually change to become: Winds from the Southeast (140°) at 4 kt. Visibility will be good at 6 km. Weather conditions: Light Rain. Few clouds at 800 feet, Broken clouds at 2000 feet, Broken clouds at 4000 feet. Marginal VFR conditions - some restrictions for visual flying.

TEMPO 18:00Z - 23:00Z
VFR
Visibility
10+ km
Clouds
FEW010 BKN040
📖 Plain English Explanation:

Temporary conditions (lasting less than an hour at a time) may include: Visibility will be excellent at 10+ km. Few clouds at 1000 feet, Broken clouds at 4000 feet. 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.