St. John's International Airport

CYYT / YYT

St. John's, CA

Current TAF Forecast

Raw TAF:
TAF CYYT 150540Z 1506/1606 VRB03KT P6SM FEW080 BKN180 FM150900 19008KT P6SM FEW020 OVC080 TEMPO 1509/1511 P6SM -RA BKN020 OVC070 BECMG 1509/1511 16012KT FM151100 16012KT 4SM -RA BR BKN004 OVC030 TEMPO 1511/1514 P6SM -RA SCT004 BKN030 OVC060 PROB40 1511/1514 2SM -RA BR OVC003 FM151400 13015G25KT 2SM -RA BR OVC003 PROB40 1514/1517 1/2SM -RA FG VV002 FM151700 13018G32KT 3/4SM -RA BR OVC003 PROB40 1517/1520 1/2SM -RA FG VV002 FM152000 14015G25KT 1/2SM -DZ FG VV002 PROB30 1520/1523 1/4SM FG VV001 FM152300 11008KT 1/4SM -DZ FG VV002 PROB30 1523/1604 1/8SM FG VV001 FM160400 13005KT 1/2SM -RA FG VV002 PROB40 1604/1606 1/4SM -RA FG VV001 RMK NXT FCST BY 151200Z

Detailed TAF Table

Parameter
Fri
07:00Z
+-1h
Fri
08:00Z
+0h
Fri
09:00Z
+1h
Fri
10:00Z
+2h
Fri
11:00Z
+3h
Fri
12:00Z
+4h
Fri
13:00Z
+5h
Fri
14:00Z
+6h
Fri
15:00Z
+7h
Fri
16:00Z
+8h
Fri
17:00Z
+9h
Fri
18:00Z
+10h
Fri
19:00Z
+11h
Fri
20:00Z
+12h
Fri
21:00Z
+13h
Fri
22:00Z
+14h
Fri
23:00Z
+15h
Sat
00:00Z
+16h
Sat
01:00Z
+17h
Sat
02:00Z
+18h
Sat
03:00Z
+19h
Sat
04:00Z
+20h
Wind Dir
VRB
VRB
160°
S
160°
S
160°
S
160°
S
160°
S
160°
S
160°
S
160°
S
160°
S
160°
S
160°
S
160°
S
160°
S
160°
S
160°
S
160°
S
160°
S
160°
S
160°
S
160°
S
Wind Speed
3 kt
3 kt
12 kt
12 kt
12 kt
12 kt
12 kt
12 kt
G25 kt
12 kt
G25 kt
12 kt
G25 kt
12 kt
G32 kt
12 kt
G32 kt
12 kt
G32 kt
12 kt
G25 kt
12 kt
G25 kt
12 kt
G25 kt
12 kt
G25 kt
12 kt
G25 kt
12 kt
G25 kt
12 kt
12 kt
12 kt
Visibility
>6SM
>6SM
>6SM
>6SM
2SM
2SM
2SM
1/2SM
1/2SM
1/2SM
1/2SM
1/2SM
1/2SM
1/4SM
1/4SM
1/4SM
1/8SM
1/8SM
1/8SM
1/8SM
1/8SM
1/4SM
Weather
☀️ Clear
☀️ Clear
Light Rain
-RA
Light Rain
-RA
Light Rain, Mist
-RA BR
40%
Light Rain, Mist
-RA BR
40%
Light Rain, Mist
-RA BR
40%
Light Rain, Fog
-RA FG
40%
Light Rain, Fog
-RA FG
40%
Light Rain, Fog
-RA FG
40%
Light Rain, Fog
-RA FG
40%
Light Rain, Fog
-RA FG
40%
Light Rain, Fog
-RA FG
40%
Fog
FG
30%
Fog
FG
30%
Fog
FG
30%
Fog
FG
30%
Fog
FG
30%
Fog
FG
30%
Fog
FG
30%
Fog
FG
30%
Light Rain, Fog, FCST
-RA FG FCST
40%
Clouds
FEW080
BKN180
FEW080
BKN180
BKN020
OVC070
BKN020
OVC070
OVC003
OVC003
OVC003
VV002
VV002
VV002
VV002
VV002
VV002
VV001
VV001
VV001
VV001
VV001
VV001
VV001
VV001
VV001
Ceiling
18,000 ft
AGL
18,000 ft
AGL
2,000 ft
AGL
2,000 ft
AGL
300 ft
AGL
300 ft
AGL
300 ft
AGL
200 ft 🌫️
Indefinite
200 ft 🌫️
Indefinite
200 ft 🌫️
Indefinite
200 ft 🌫️
Indefinite
200 ft 🌫️
Indefinite
200 ft 🌫️
Indefinite
100 ft 🌫️
Indefinite
100 ft 🌫️
Indefinite
100 ft 🌫️
Indefinite
100 ft 🌫️
Indefinite
100 ft 🌫️
Indefinite
100 ft 🌫️
Indefinite
100 ft 🌫️
Indefinite
100 ft 🌫️
Indefinite
100 ft 🌫️
Indefinite
Flight Rules VFR VFR MVFR MVFR LIFR LIFR LIFR LIFR LIFR LIFR LIFR LIFR LIFR LIFR LIFR LIFR LIFR LIFR LIFR LIFR LIFR LIFR
Day/Night
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
🌇 19:10Z
☀️
Day
🌇 19:10Z
☀️
Day
🌇 19:10Z
🌙
Night
🌇 19:10Z
🌙
Night
🌇 19:10Z
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌅 04:49Z
🌙
Night
🌅 04:49Z
🌙
Night
🌅 04:49Z
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 3 kt
Visibility
>6SM
Clouds
FEW080 BKN180
📖 Plain English Explanation:

This is the base forecast condition. Winds will be variable in direction at 3 kt. Visibility will be excellent at more than 6SM. Few clouds at 8000 feet, Broken clouds at 18000 feet. Conditions will be suitable for Visual Flight Rules (VFR) operations.

FM150900 09:00Z - 15:00Z
VFR
Wind
190° at 8 kt
Visibility
>6SM
Clouds
FEW020 OVC080
📖 Plain English Explanation:

Winds from the South (190°) at 8 kt. Visibility will be excellent at more than 6SM. Few clouds at 2000 feet, Overcast skies at 8000 feet. Conditions will be suitable for Visual Flight Rules (VFR) operations.

TEMPO 09:00Z - 11:00Z
MVFR
Visibility
>6SM
Weather
Light Rain
Clouds
BKN020 OVC070
📖 Plain English Explanation:

Temporary conditions (lasting less than an hour at a time) may include: Visibility will be excellent at more than 6SM. Weather conditions: Light Rain. Broken clouds at 2000 feet, Overcast skies at 7000 feet. Marginal VFR conditions - some restrictions for visual flying.

BECMG 09:00Z - 11:00Z
VFR
Wind
160° at 12 kt
📖 Plain English Explanation:

Conditions will gradually change to become: Winds from the South-Southeast (160°) at 12 kt. Conditions will be suitable for Visual Flight Rules (VFR) operations.

FM151100 11:00Z - 17:00Z
LIFR
Wind
160° at 12 kt
Visibility
4SM
Weather
Light Rain, Mist
Clouds
BKN004 OVC030
📖 Plain English Explanation:

Winds from the South-Southeast (160°) at 12 kt. Visibility will be good at 4SM. Weather conditions: Light Rain, Mist. Broken clouds at 400 feet, Overcast skies at 3000 feet. Low IFR conditions - challenging even for instrument operations.

TEMPO 11:00Z - 14:00Z
VFR
Visibility
>6SM
Weather
Light Rain
Clouds
SCT004 BKN030 OVC060
📖 Plain English Explanation:

Temporary conditions (lasting less than an hour at a time) may include: Visibility will be excellent at more than 6SM. Weather conditions: Light Rain. Scattered clouds at 400 feet, Broken clouds at 3000 feet, Overcast skies at 6000 feet. Conditions will be suitable for Visual Flight Rules (VFR) operations.

PROB40 11:00Z - 14:00Z
LIFR
Visibility
2SM
Weather
Light Rain, Mist
Clouds
OVC003
📖 Plain English Explanation:

There is a 40% probability of: Visibility will be moderate at 2SM. Weather conditions: Light Rain, Mist. Overcast skies at 300 feet. Low IFR conditions - challenging even for instrument operations.

FM151400 14:00Z - 20:00Z
LIFR
Wind
130° at 15 kt
Gusts: 25 kt
Visibility
2SM
Weather
Light Rain, Mist
Clouds
OVC003
📖 Plain English Explanation:

Winds from the Southeast (130°) at 15 kt. Gusts up to 25 kt are expected. Visibility will be moderate at 2SM. Weather conditions: Light Rain, Mist. Overcast skies at 300 feet. Low IFR conditions - challenging even for instrument operations.

PROB40 14:00Z - 17:00Z
LIFR
Visibility
1/2SM
Weather
Light Rain, Fog
Clouds
VV002
📖 Plain English Explanation:

There is a 40% probability of: Visibility will be moderate at 1/2SM. Weather conditions: Light Rain, Fog. Vertical visibility at 200 feet. Low IFR conditions - challenging even for instrument operations.

FM151700 17:00Z - 23:00Z
LIFR
Wind
130° at 18 kt
Gusts: 32 kt
Visibility
3/4SM
Weather
Light Rain, Mist
Clouds
OVC003
📖 Plain English Explanation:

Winds from the Southeast (130°) at 18 kt. Gusts up to 32 kt are expected. Visibility will be good at 3/4SM. Weather conditions: Light Rain, Mist. Overcast skies at 300 feet. Low IFR conditions - challenging even for instrument operations.

PROB40 17:00Z - 20:00Z
LIFR
Visibility
1/2SM
Weather
Light Rain, Fog
Clouds
VV002
📖 Plain English Explanation:

There is a 40% probability of: Visibility will be moderate at 1/2SM. Weather conditions: Light Rain, Fog. Vertical visibility at 200 feet. Low IFR conditions - challenging even for instrument operations.

FM152000 20:00Z - 02:00Z
LIFR
Wind
140° at 15 kt
Gusts: 25 kt
Visibility
1/2SM
Weather
Light Drizzle, Fog
Clouds
VV002
📖 Plain English Explanation:

Winds from the Southeast (140°) at 15 kt. Gusts up to 25 kt are expected. Visibility will be moderate at 1/2SM. Weather conditions: Light Drizzle, Fog. Vertical visibility at 200 feet. Low IFR conditions - challenging even for instrument operations.

PROB30 20:00Z - 23:00Z
LIFR
Visibility
1/4SM
Weather
Fog
Clouds
VV001
📖 Plain English Explanation:

There is a 30% probability of: Visibility will be moderate at 1/4SM. Weather conditions: Fog. Vertical visibility at 100 feet. Low IFR conditions - challenging even for instrument operations.

FM152300 23:00Z - 05:00Z
LIFR
Wind
110° at 8 kt
Visibility
1/4SM
Weather
Light Drizzle, Fog
Clouds
VV002
📖 Plain English Explanation:

Winds from the East-Southeast (110°) at 8 kt. Visibility will be moderate at 1/4SM. Weather conditions: Light Drizzle, Fog. Vertical visibility at 200 feet. Low IFR conditions - challenging even for instrument operations.

PROB30 23:00Z - 04:00Z
LIFR
Visibility
1/8SM
Weather
Fog
Clouds
VV001
📖 Plain English Explanation:

There is a 30% probability of: Visibility will be moderate at 1/8SM. Weather conditions: Fog. Vertical visibility at 100 feet. Low IFR conditions - challenging even for instrument operations.

FM160400 04:00Z - 10:00Z
LIFR
Wind
130° at 5 kt
Visibility
1/2SM
Weather
Light Rain, Fog
Clouds
VV002
📖 Plain English Explanation:

Winds from the Southeast (130°) at 5 kt. Visibility will be moderate at 1/2SM. Weather conditions: Light Rain, Fog. Vertical visibility at 200 feet. Low IFR conditions - challenging even for instrument operations.

PROB40 04:00Z - 06:00Z
LIFR
Visibility
1/4SM
Weather
Light Rain, Fog, FCST
Clouds
VV001
📖 Plain English Explanation:

There is a 40% probability of: Visibility will be moderate at 1/4SM. Weather conditions: Light Rain, Fog, FCST. Vertical visibility at 100 feet. Low IFR conditions - challenging even for instrument 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.