St. Louis Lambert International Airport

KSTL / STL

St Louis, US

Current TAF Forecast

Raw TAF:
KSTL 150520Z 1506/1612 VRB04KT P6SM BKN100 FM151400 09005KT P6SM SCT250

Detailed TAF Table

Parameter
Mon
08:00Z
+-1h
Mon
09:00Z
+0h
Mon
10:00Z
+1h
Mon
11:00Z
+2h
Mon
12:00Z
+3h
Mon
13:00Z
+4h
Mon
14:00Z
+5h
Mon
15:00Z
+6h
Mon
16:00Z
+7h
Mon
17:00Z
+8h
Mon
18:00Z
+9h
Mon
19:00Z
+10h
Mon
20:00Z
+11h
Mon
21:00Z
+12h
Mon
22:00Z
+13h
Mon
23:00Z
+14h
Tue
00:00Z
+15h
Tue
01:00Z
+16h
Tue
02:00Z
+17h
Tue
03:00Z
+18h
Tue
04:00Z
+19h
Tue
05:00Z
+20h
Tue
06:00Z
+21h
Tue
07:00Z
+22h
Tue
08:00Z
+23h
Tue
09:00Z
+24h
Tue
10:00Z
+25h
Wind Dir
VRB
VRB
VRB
VRB
VRB
VRB
90°
E
90°
E
90°
E
90°
E
90°
E
90°
E
VRB
VRB
VRB
VRB
VRB
VRB
VRB
VRB
VRB
VRB
VRB
VRB
VRB
VRB
VRB
Wind Speed
4kt
4kt
4kt
4kt
4kt
4kt
5kt
5kt
5kt
5kt
5kt
5kt
4kt
4kt
4kt
4kt
4kt
4kt
4kt
4kt
4kt
4kt
4kt
4kt
4kt
4kt
4kt
Visibility
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
Weather
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
Clouds
BKN100
BKN100
BKN100
BKN100
BKN100
BKN100
SCT250
SCT250
SCT250
SCT250
SCT250
SCT250
BKN100
BKN100
BKN100
BKN100
BKN100
BKN100
BKN100
BKN100
BKN100
BKN100
BKN100
BKN100
BKN100
BKN100
BKN100
Ceiling
10000ft
AGL
10000ft
AGL
10000ft
AGL
10000ft
AGL
10000ft
AGL
10000ft
AGL
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
10000ft
AGL
10000ft
AGL
10000ft
AGL
10000ft
AGL
10000ft
AGL
10000ft
AGL
10000ft
AGL
10000ft
AGL
10000ft
AGL
10000ft
AGL
10000ft
AGL
10000ft
AGL
10000ft
AGL
10000ft
AGL
10000ft
AGL
Flight Rules VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR
Day/Night
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
🌇 18:08
☀️
Day
🌇 18:08
☀️
Day
🌇 18:08
🌙
Night
🌇 18:08
🌙
Night
🌇 18:08
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌅 05:52
🌙
Night
🌅 05:52
🌙
Night
🌅 05:52
☀️
Day
🌅 05:52
☀️
Day
🌅 05:52
☀️
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 occurrenceAGL: Above Ground Level

Forecast Periods

BASE
VFR
Wind
VRB° at 4 kt
Visibility
>6SM
Clouds
BKN100
📖 Plain English Explanation:

This is the base forecast condition. Winds will be variable in direction at 4kt. Visibility will be excellent at more than 6SM. Broken clouds at 10000 feet. Conditions will be suitable for Visual Flight Rules (VFR) operations.

FM151400 2025-09-15 14:00:00 - 2025-09-15 20:00:00
VFR
Wind
90° at 5 kt
Visibility
>6SM
Clouds
SCT250
📖 Plain English Explanation:

Winds from the East (90°) at 5kt. Visibility will be excellent at more than 6SM. Scattered clouds at 25000 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.