Portland Troutdale Airport

KTTD / TTD

Portland, US

Current TAF Forecast

Raw TAF:
TAF KTTD 041134Z 0412/0512 22003KT P6SM -RA BKN035 OVC060 FM041700 23007KT P6SM -SHRA BKN025 OVC035 FM050600 24003KT P6SM -SHRA SCT025 BKN035

Detailed TAF Table

Parameter
Wed
17:00Z
+-1h
Wed
18:00Z
+0h
Wed
19:00Z
+1h
Wed
20:00Z
+2h
Wed
21:00Z
+3h
Wed
22:00Z
+4h
Wed
23:00Z
+5h
Thu
00:00Z
+6h
Thu
01:00Z
+7h
Thu
02:00Z
+8h
Thu
03:00Z
+9h
Thu
04:00Z
+10h
Thu
05:00Z
+11h
Thu
06:00Z
+12h
Thu
07:00Z
+13h
Thu
08:00Z
+14h
Thu
09:00Z
+15h
Thu
10:00Z
+16h
Wind Dir
220°
SW
220°
SW
220°
SW
220°
SW
220°
SW
220°
SW
220°
SW
220°
SW
220°
SW
220°
SW
220°
SW
220°
SW
220°
SW
240°
SW
240°
SW
240°
SW
240°
SW
240°
SW
Wind Speed
3 kt
3 kt
3 kt
3 kt
3 kt
3 kt
3 kt
3 kt
3 kt
3 kt
3 kt
3 kt
3 kt
3 kt
3 kt
3 kt
3 kt
3 kt
Visibility
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
Weather
Light Rain
-RA
Light Rain
-RA
Light Rain
-RA
Light Rain
-RA
Light Rain
-RA
Light Rain
-RA
Light Rain
-RA
Light Rain
-RA
Light Rain
-RA
Light Rain
-RA
Light Rain
-RA
Light Rain
-RA
Light Rain
-RA
Light Showers Rain
-SHRA
Light Showers Rain
-SHRA
Light Showers Rain
-SHRA
Light Showers Rain
-SHRA
Light Showers Rain
-SHRA
Clouds
BKN035
OVC060
BKN035
OVC060
BKN035
OVC060
BKN035
OVC060
BKN035
OVC060
BKN035
OVC060
BKN035
OVC060
BKN035
OVC060
BKN035
OVC060
BKN035
OVC060
BKN035
OVC060
BKN035
OVC060
BKN035
OVC060
SCT025
BKN035
SCT025
BKN035
SCT025
BKN035
SCT025
BKN035
SCT025
BKN035
Ceiling
3,500 ft
AGL
3,500 ft
AGL
3,500 ft
AGL
3,500 ft
AGL
3,500 ft
AGL
3,500 ft
AGL
3,500 ft
AGL
3,500 ft
AGL
3,500 ft
AGL
3,500 ft
AGL
3,500 ft
AGL
3,500 ft
AGL
3,500 ft
AGL
3,500 ft
AGL
3,500 ft
AGL
3,500 ft
AGL
3,500 ft
AGL
3,500 ft
AGL
Flight Rules VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR
Day/Night
☀️
Day
🌇 17:32Z
🌇
Dusk
🌇 17:32Z
🌙
Night
🌇 17:32Z
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌅 06:26Z
🌙
Night
🌅 06:26Z
🌅
Dawn
🌅 06:26Z
☀️
Day
🌅 06:26Z
☀️
Day
🌅 06:26Z
☀️
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
220° at 3 kt
Visibility
>6SM
Weather
Light Rain
Clouds
BKN035 OVC060
📖 Plain English Explanation:

This is the base forecast condition. Winds from the Southwest (220°) at 3 kt. Visibility will be excellent at more than 6SM. Weather conditions: Light Rain. Broken clouds at 3500 feet, Overcast skies at 6000 feet. Conditions will be suitable for Visual Flight Rules (VFR) operations.

FM041700 17:00Z - 23:00Z
MVFR
Wind
230° at 7 kt
Visibility
>6SM
Weather
Light Showers Rain
Clouds
BKN025 OVC035
📖 Plain English Explanation:

Winds from the Southwest (230°) at 7 kt. Visibility will be excellent at more than 6SM. Weather conditions: Light Showers Rain. Broken clouds at 2500 feet, Overcast skies at 3500 feet. Marginal VFR conditions - some restrictions for visual flying.

FM050600 06:00Z - 12:00Z
VFR
Wind
240° at 3 kt
Visibility
>6SM
Weather
Light Showers Rain
Clouds
SCT025 BKN035
📖 Plain English Explanation:

Winds from the West-Southwest (240°) at 3 kt. Visibility will be excellent at more than 6SM. Weather conditions: Light Showers Rain. Scattered clouds at 2500 feet, Broken clouds at 3500 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.