St. Louis Lambert International Airport

KSTL / STL

St Louis, US

Current TAF Forecast

Raw TAF:
TAF KSTL 050530Z 0506/0612 26004KT P6SM BKN200 FM051700 35006KT P6SM BKN050 PROB30 0520/0524 4SM -TSRA OVC050CB

Detailed TAF Table

Parameter
Sun
08:00Z
+-1h
Sun
09:00Z
+0h
Sun
10:00Z
+1h
Sun
11:00Z
+2h
Sun
12:00Z
+3h
Sun
13:00Z
+4h
Sun
14:00Z
+5h
Sun
15:00Z
+6h
Sun
16:00Z
+7h
Sun
17:00Z
+8h
Sun
18:00Z
+9h
Sun
19:00Z
+10h
Sun
20:00Z
+11h
Sun
21:00Z
+12h
Sun
22:00Z
+13h
Sun
23:00Z
+14h
Mon
00:00Z
+15h
Mon
01:00Z
+16h
Mon
02:00Z
+17h
Mon
03:00Z
+18h
Mon
04:00Z
+19h
Mon
05:00Z
+20h
Mon
06:00Z
+21h
Mon
07:00Z
+22h
Mon
08:00Z
+23h
Mon
09:00Z
+24h
Mon
10:00Z
+25h
Wind Dir
260°
W
260°
W
260°
W
260°
W
260°
W
260°
W
260°
W
260°
W
260°
W
350°
N
350°
N
350°
N
260°
W
260°
W
260°
W
260°
W
260°
W
260°
W
260°
W
260°
W
260°
W
260°
W
260°
W
260°
W
260°
W
260°
W
260°
W
Wind Speed
4 kt
4 kt
4 kt
4 kt
4 kt
4 kt
4 kt
4 kt
4 kt
6 kt
6 kt
6 kt
4 kt
4 kt
4 kt
4 kt
4 kt
4 kt
4 kt
4 kt
4 kt
4 kt
4 kt
4 kt
4 kt
4 kt
4 kt
Visibility
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
4SM
4SM
4SM
4SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
Weather
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
Light Thunderstorm Rain
-TSRA
30%
Light Thunderstorm Rain
-TSRA
30%
Light Thunderstorm Rain
-TSRA
30%
Light Thunderstorm Rain
-TSRA
30%
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
Clouds
BKN200
BKN200
BKN200
BKN200
BKN200
BKN200
BKN200
BKN200
BKN200
BKN050
BKN050
BKN050
OVC050CB
OVC050CB
OVC050CB
OVC050CB
BKN200
BKN200
BKN200
BKN200
BKN200
BKN200
BKN200
BKN200
BKN200
BKN200
BKN200
Ceiling
20,000 ft
AGL
20,000 ft
AGL
20,000 ft
AGL
20,000 ft
AGL
20,000 ft
AGL
20,000 ft
AGL
20,000 ft
AGL
20,000 ft
AGL
20,000 ft
AGL
5,000 ft
AGL
5,000 ft
AGL
5,000 ft
AGL
5,000 ft
AGL
5,000 ft
AGL
5,000 ft
AGL
5,000 ft
AGL
20,000 ft
AGL
20,000 ft
AGL
20,000 ft
AGL
20,000 ft
AGL
20,000 ft
AGL
20,000 ft
AGL
20,000 ft
AGL
20,000 ft
AGL
20,000 ft
AGL
20,000 ft
AGL
20,000 ft
AGL
Flight Rules VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR MVFR MVFR MVFR MVFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR
Day/Night
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
🌇 19:13Z
☀️
Day
🌇 19:13Z
☀️
Day
🌇 19:13Z
🌙
Night
🌇 19:13Z
🌙
Night
🌇 19:13Z
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌅 04:46Z
🌙
Night
🌅 04:46Z
🌙
Night
🌅 04:46Z
☀️
Day
🌅 04:46Z
☀️
Day
🌅 04:46Z
☀️
Day
☀️
Day
☀️
Day
☀️
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 occurrence • AGL: Above Ground Level

Forecast Periods

BASE
VFR
Wind
260° at 4 kt
Visibility
>6SM
Clouds
BKN200
📖 Plain English Explanation:

This is the base forecast condition. Winds from the West (260°) at 4 kt. Visibility will be excellent at more than 6SM. Broken clouds at 20000 feet. Conditions will be suitable for Visual Flight Rules (VFR) operations.

FM051700 17:00Z - 23:00Z
VFR
Wind
350° at 6 kt
Visibility
>6SM
Clouds
BKN050
📖 Plain English Explanation:

Winds from the North (350°) at 6 kt. Visibility will be excellent at more than 6SM. Broken clouds at 5000 feet. Conditions will be suitable for Visual Flight Rules (VFR) operations.

PROB30 20:00Z - 00:00Z
MVFR
Visibility
4SM
Weather
Light Thunderstorm Rain
Clouds
OVC050CB
📖 Plain English Explanation:

There is a 30% probability of: Visibility will be good at 4SM. Weather conditions: Light Thunderstorm Rain. Overcast skies at 5000 feet. Marginal VFR conditions - some restrictions for visual flying.

📚 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.