Seinäjoki Airport

EFSI / SJY

Seinäjoki / Ilmajoki, FI

Current TAF Forecast

Raw TAF:
TAF AMD EFSI 040953Z 0409/0418 25010KT 9999 BKN035 TEMPO 0409/0415 27015G27KT 4000 -SNRA BKN013 FEW040CB TEMPO 0415/0417 BKN013 BECMG 0415/0417 32012KT

Detailed TAF Table

Parameter
Wed
10:00Z
+-1h
Wed
11:00Z
+0h
Wed
12:00Z
+1h
Wed
13:00Z
+2h
Wed
14:00Z
+3h
Wed
15:00Z
+4h
Wed
16:00Z
+5h
Wind Dir
250°
W
250°
W
250°
W
250°
W
250°
W
320°
NW
320°
NW
Wind Speed
10 kt
10 kt
10 kt
10 kt
10 kt
12 kt
12 kt
Visibility
10+ km
10+ km
10+ km
10+ km
10+ km
10+ km
10+ km
Weather
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
Clouds
BKN035
BKN035
BKN035
BKN035
BKN035
BKN013
BKN013
Ceiling
3,500 ft
AGL
3,500 ft
AGL
3,500 ft
AGL
3,500 ft
AGL
3,500 ft
AGL
1,300 ft
AGL
1,300 ft
AGL
Flight Rules VFR VFR VFR VFR VFR MVFR MVFR
Day/Night
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
🌇 17:25Z
☀️
Day
🌇 17:25Z
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
250° at 10 kt
Visibility
10+ km
Clouds
BKN035
📖 Plain English Explanation:

This is the base forecast condition. Winds from the West-Southwest (250°) at 10 kt. Visibility will be excellent at 10+ km. Broken clouds at 3500 feet. Conditions will be suitable for Visual Flight Rules (VFR) operations.

TEMPO 09:00Z - 15:00Z
IFR
Wind
270° at 15 kt
Gusts: 27 kt
Visibility
4 km
Weather
Light SNRA
Clouds
BKN013 FEW040CB
📖 Plain English Explanation:

Temporary conditions (lasting less than an hour at a time) may include: Winds from the West (270°) at 15 kt. Gusts up to 27 kt are expected. Visibility will be moderate at 4 km. Weather conditions: Light SNRA. Broken clouds at 1300 feet, Few clouds at 4000 feet. Instrument Flight Rules (IFR) conditions - instrument flying required.

TEMPO 15:00Z - 17:00Z
MVFR
Clouds
BKN013
📖 Plain English Explanation:

Temporary conditions (lasting less than an hour at a time) may include: Broken clouds at 1300 feet. Marginal VFR conditions - some restrictions for visual flying.

BECMG 15:00Z - 17:00Z
VFR
Wind
320° at 12 kt
📖 Plain English Explanation:

Conditions will gradually change to become: Winds from the Northwest (320°) at 12 kt. 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.