Saint John Airport

CYSJ / YSJ

Saint John, CA

Current TAF Forecast

Raw TAF:
TAF CYSJ 230540Z 2306/2318 21010KT 2SM -RA BR OVC004 TEMPO 2306/2314 6SM BR OVC008 FM231400 20006KT 3SM -RA BR OVC004 TEMPO 2314/2316 P6SM NSW SCT004 OVC012 FM231600 20008KT P6SM SCT007 OVC012 TEMPO 2316/2318 5SM -SHRA BR BKN007 OVC012 RMK NXT FCST BY 231200Z

Detailed TAF Table

Parameter
Thu
11:00Z
+-1h
Thu
12:00Z
+0h
Thu
13:00Z
+1h
Thu
14:00Z
+2h
Thu
15:00Z
+3h
Thu
16:00Z
+4h
Wind Dir
210°
SW
210°
SW
210°
SW
210°
SW
210°
SW
210°
SW
Wind Speed
10 kt
10 kt
10 kt
10 kt
10 kt
10 kt
Visibility
2SM
2SM
2SM
>6SM
>6SM
5SM
Weather
Light Rain, Mist
-RA BR
Light Rain, Mist
-RA BR
Light Rain, Mist
-RA BR
☀️ Clear
☀️ Clear
Light Showers Rain, Mist, FCST
-SHRA BR FCST
Clouds
OVC004
OVC004
OVC004
SCT004
OVC012
SCT004
OVC012
BKN007
OVC012
Ceiling
400 ft
AGL
400 ft
AGL
400 ft
AGL
1,200 ft
AGL
1,200 ft
AGL
700 ft
AGL
Flight Rules LIFR LIFR LIFR MVFR MVFR IFR
Day/Night
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
🌇 18:43Z
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
LIFR
Wind
210° at 10 kt
Visibility
2SM
Weather
Light Rain, Mist
Clouds
OVC004
📖 Plain English Explanation:

This is the base forecast condition. Winds from the South-Southwest (210°) at 10 kt. Visibility will be moderate at 2SM. Weather conditions: Light Rain, Mist. Overcast skies at 400 feet. Low IFR conditions - challenging even for instrument operations.

TEMPO 06:00Z - 14:00Z
IFR
Visibility
6SM
Weather
Mist
Clouds
OVC008
📖 Plain English Explanation:

Temporary conditions (lasting less than an hour at a time) may include: Visibility will be excellent at 6SM. Weather conditions: Mist. Overcast skies at 800 feet. Instrument Flight Rules (IFR) conditions - instrument flying required.

FM231400 14:00Z - 20:00Z
LIFR
Wind
200° at 6 kt
Visibility
3SM
Weather
Light Rain, Mist
Clouds
OVC004
📖 Plain English Explanation:

Winds from the South-Southwest (200°) at 6 kt. Visibility will be good at 3SM. Weather conditions: Light Rain, Mist. Overcast skies at 400 feet. Low IFR conditions - challenging even for instrument operations.

TEMPO 14:00Z - 16:00Z
MVFR
Visibility
>6SM
Clouds
SCT004 OVC012
📖 Plain English Explanation:

Temporary conditions (lasting less than an hour at a time) may include: Visibility will be excellent at more than 6SM. Scattered clouds at 400 feet, Overcast skies at 1200 feet. Marginal VFR conditions - some restrictions for visual flying.

FM231600 16:00Z - 22:00Z
MVFR
Wind
200° at 8 kt
Visibility
>6SM
Clouds
SCT007 OVC012
📖 Plain English Explanation:

Winds from the South-Southwest (200°) at 8 kt. Visibility will be excellent at more than 6SM. Scattered clouds at 700 feet, Overcast skies at 1200 feet. Marginal VFR conditions - some restrictions for visual flying.

TEMPO 16:00Z - 18:00Z
IFR
Visibility
5SM
Weather
Light Showers Rain, Mist, FCST
Clouds
BKN007 OVC012
📖 Plain English Explanation:

Temporary conditions (lasting less than an hour at a time) may include: Visibility will be good at 5SM. Weather conditions: Light Showers Rain, Mist, FCST. Broken clouds at 700 feet, Overcast skies at 1200 feet. 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.