Trenton Mercer Airport

KTTN / TTN

Ewing Township, US

Current TAF Forecast

Raw TAF:
TAF KTTN 041720Z 0418/0518 08005KT P6SM -SHRA FEW020 BKN090 TEMPO 0421/0424 6SM -SHRA BR OVC020 FM050000 VRB02KT 6SM BR VCSH OVC012 FM050200 VRB02KT 2SM BR OVC006 FM050900 VRB02KT 1SM -SHRA BR OVC003 FM051500 08005KT 3SM BR OVC006

Detailed TAF Table

Parameter
Wed
22:00Z
+-1h
Wed
23:00Z
+0h
Thu
00:00Z
+1h
Thu
01:00Z
+2h
Thu
02:00Z
+3h
Thu
03:00Z
+4h
Thu
04:00Z
+5h
Thu
05:00Z
+6h
Thu
06:00Z
+7h
Thu
07:00Z
+8h
Thu
08:00Z
+9h
Thu
09:00Z
+10h
Thu
10:00Z
+11h
Thu
11:00Z
+12h
Thu
12:00Z
+13h
Thu
13:00Z
+14h
Thu
14:00Z
+15h
Thu
15:00Z
+16h
Thu
16:00Z
+17h
Wind Dir
80°
E
80°
E
VRB
VRB
VRB
VRB
VRB
VRB
VRB
VRB
80°
E
VRB
VRB
VRB
VRB
VRB
VRB
80°
E
80°
E
Wind Speed
5 kt
5 kt
2 kt
2 kt
2 kt
2 kt
2 kt
2 kt
2 kt
2 kt
5 kt
2 kt
2 kt
2 kt
2 kt
2 kt
2 kt
5 kt
5 kt
Visibility
>6SM
>6SM
6SM
6SM
2SM
2SM
2SM
2SM
2SM
2SM
>6SM
1SM
1SM
1SM
1SM
1SM
1SM
3SM
3SM
Weather
Light Showers Rain
-SHRA
Light Showers Rain
-SHRA
Mist
BR
Mist
BR
Mist
BR
Mist
BR
Mist
BR
Mist
BR
Mist
BR
Mist
BR
Light Showers Rain
-SHRA
Light Showers Rain, Mist
-SHRA BR
Light Showers Rain, Mist
-SHRA BR
Light Showers Rain, Mist
-SHRA BR
Light Showers Rain, Mist
-SHRA BR
Light Showers Rain, Mist
-SHRA BR
Light Showers Rain, Mist
-SHRA BR
Mist
BR
Mist
BR
Clouds
FEW020
BKN090
FEW020
BKN090
OVC012
OVC012
OVC006
OVC006
OVC006
OVC006
OVC006
OVC006
FEW020
BKN090
OVC003
OVC003
OVC003
OVC003
OVC003
OVC003
OVC006
OVC006
Ceiling
9,000 ft
AGL
9,000 ft
AGL
1,200 ft
AGL
1,200 ft
AGL
600 ft
AGL
600 ft
AGL
600 ft
AGL
600 ft
AGL
600 ft
AGL
600 ft
AGL
9,000 ft
AGL
300 ft
AGL
300 ft
AGL
300 ft
AGL
300 ft
AGL
300 ft
AGL
300 ft
AGL
600 ft
AGL
600 ft
AGL
Flight Rules VFR VFR IFR IFR IFR IFR IFR IFR IFR IFR VFR LIFR LIFR LIFR LIFR LIFR LIFR IFR IFR
Day/Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌅 06:23Z
🌙
Night
🌅 06:23Z
🌅
Dawn
🌅 06:23Z
☀️
Day
🌅 06:23Z
☀️
Day
🌅 06:23Z
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
🌇 17:36Z
☀️
Day
🌇 17:36Z
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
80° at 5 kt
Visibility
>6SM
Weather
Light Showers Rain
Clouds
FEW020 BKN090
📖 Plain English Explanation:

This is the base forecast condition. Winds from the East (80°) at 5 kt. Visibility will be excellent at more than 6SM. Weather conditions: Light Showers Rain. Few clouds at 2000 feet, Broken clouds at 9000 feet. Conditions will be suitable for Visual Flight Rules (VFR) operations.

TEMPO 21:00Z - 00:00Z
MVFR
Visibility
6SM
Weather
Light Showers Rain, Mist
Clouds
OVC020
📖 Plain English Explanation:

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

FM050000 00:00Z - 06:00Z
IFR
Wind
VRB° at 2 kt
Visibility
6SM
Weather
Mist
Clouds
OVC012
📖 Plain English Explanation:

Winds will be variable in direction at 2 kt. Visibility will be excellent at 6SM. Weather conditions: Mist. Overcast skies at 1200 feet. Instrument Flight Rules (IFR) conditions - instrument flying required.

FM050200 02:00Z - 08:00Z
IFR
Wind
VRB° at 2 kt
Visibility
2SM
Weather
Mist
Clouds
OVC006
📖 Plain English Explanation:

Winds will be variable in direction at 2 kt. Visibility will be moderate at 2SM. Weather conditions: Mist. Overcast skies at 600 feet. Instrument Flight Rules (IFR) conditions - instrument flying required.

FM050900 09:00Z - 15:00Z
LIFR
Wind
VRB° at 2 kt
Visibility
1SM
Weather
Light Showers Rain, Mist
Clouds
OVC003
📖 Plain English Explanation:

Winds will be variable in direction at 2 kt. Visibility will be moderate at 1SM. Weather conditions: Light Showers Rain, Mist. Overcast skies at 300 feet. Low IFR conditions - challenging even for instrument operations.

FM051500 15:00Z - 21:00Z
IFR
Wind
80° at 5 kt
Visibility
3SM
Weather
Mist
Clouds
OVC006
📖 Plain English Explanation:

Winds from the East (80°) at 5 kt. Visibility will be good at 3SM. Weather conditions: Mist. Overcast skies at 600 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.