Rennes-Saint-Jacques Airport

LFRN / RNS

Saint-Jacques-de-la-Lande, Ille-et-Vilaine, FR

Current TAF Forecast

Raw TAF:
TAF LFRN 100500Z 1006/1106 VRB05KT 9999 BKN040 BECMG 1006/1009 28010KT TEMPO 1011/1017 4000 SHRA BKN025TCU PROB40 TEMPO 1012/1016 31015G25KT BECMG 1017/1020 VRB05KT PROB40 TEMPO 1103/1106 4000 BR

Detailed TAF Table

Parameter
Wed
06:00Z
+-1h
Wed
07:00Z
+0h
Wed
08:00Z
+1h
Wed
09:00Z
+2h
Wed
10:00Z
+3h
Wed
11:00Z
+4h
Wed
12:00Z
+5h
Wed
13:00Z
+6h
Wed
14:00Z
+7h
Wed
15:00Z
+8h
Wed
16:00Z
+9h
Wed
17:00Z
+10h
Wed
18:00Z
+11h
Wed
19:00Z
+12h
Wed
20:00Z
+13h
Wed
21:00Z
+14h
Wed
22:00Z
+15h
Wed
23:00Z
+16h
Thu
00:00Z
+17h
Thu
01:00Z
+18h
Thu
02:00Z
+19h
Thu
03:00Z
+20h
Thu
04:00Z
+21h
Wind Dir
VRB
VRB
VRB
280°
W
280°
W
280°
W
310°
NW
310°
NW
310°
NW
310°
NW
280°
W
280°
W
280°
W
280°
W
280°
W
280°
W
280°
W
280°
W
280°
W
280°
W
280°
W
280°
W
280°
W
Wind Speed
5 kt
5 kt
5 kt
10 kt
10 kt
10 kt
15 kt
G25 kt
15 kt
G25 kt
15 kt
G25 kt
15 kt
G25 kt
10 kt
10 kt
10 kt
10 kt
10 kt
10 kt
10 kt
10 kt
10 kt
10 kt
10 kt
10 kt
10 kt
Visibility
10+ km
10+ km
10+ km
10+ km
10+ km
4 km
10+ km
10+ km
10+ km
10+ km
4 km
10+ km
10+ km
10+ km
10+ km
10+ km
10+ km
10+ km
10+ km
10+ km
10+ km
4 km
4 km
Weather
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
Showers Rain
SHRA
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
Showers Rain
SHRA
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
Mist
BR
40%
Mist
BR
40%
Clouds
BKN040
BKN040
BKN040
☀️ CLR
☀️ CLR
BKN025TCU
☀️ CLR
☀️ CLR
☀️ CLR
☀️ CLR
BKN025TCU
☀️ CLR
☀️ CLR
☀️ CLR
☀️ CLR
☀️ CLR
☀️ CLR
☀️ CLR
☀️ CLR
☀️ CLR
☀️ CLR
☀️ CLR
☀️ CLR
Ceiling
4,000 ft
AGL
4,000 ft
AGL
4,000 ft
AGL
🌤️ Unlimited
🌤️ Unlimited
2,500 ft
AGL
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
2,500 ft
AGL
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
Flight Rules VFR VFR VFR VFR VFR IFR VFR VFR VFR VFR IFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR IFR IFR
Day/Night
☀️
Day
🌅 04:32Z
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
🌇 19:27Z
☀️
Day
🌇 19:27Z
☀️
Day
🌇 19:27Z
🌙
Night
🌇 19:27Z
🌙
Night
🌇 19:27Z
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌅 04:32Z
🌙
Night
🌅 04:32Z
🌙
Night
🌅 04:32Z
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 5 kt
Visibility
10+ km
Clouds
BKN040
📖 Plain English Explanation:

This is the base forecast condition. Winds will be variable in direction at 5 kt. Visibility will be excellent at 10+ km. Broken clouds at 4000 feet. Conditions will be suitable for Visual Flight Rules (VFR) operations.

BECMG 06:00Z - 09:00Z
VFR
Wind
280° at 10 kt
📖 Plain English Explanation:

Conditions will gradually change to become: Winds from the West (280°) at 10 kt. Conditions will be suitable for Visual Flight Rules (VFR) operations.

TEMPO 11:00Z - 17:00Z
IFR
Visibility
4 km
Weather
Showers Rain
Clouds
BKN025TCU
📖 Plain English Explanation:

Temporary conditions (lasting less than an hour at a time) may include: Visibility will be moderate at 4 km. Weather conditions: Showers Rain. Broken clouds at 2500 feet. Instrument Flight Rules (IFR) conditions - instrument flying required.

PROB40 TEMPO 12:00Z - 16:00Z
VFR
Wind
310° at 15 kt
Gusts: 25 kt
📖 Plain English Explanation:

There is a 40% probability of: Winds from the Northwest (310°) at 15 kt. Gusts up to 25 kt are expected. Conditions will be suitable for Visual Flight Rules (VFR) operations.

BECMG 17:00Z - 20:00Z
VFR
Wind
VRB° at 5 kt
📖 Plain English Explanation:

Conditions will gradually change to become: Winds will be variable in direction at 5 kt. Conditions will be suitable for Visual Flight Rules (VFR) operations.

PROB40 TEMPO 03:00Z - 06:00Z
IFR
Visibility
4 km
Weather
Mist
📖 Plain English Explanation:

There is a 40% probability of: Visibility will be moderate at 4 km. Weather conditions: Mist. Instrument Flight Rules (IFR) conditions - instrument flying required.

📚 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.