Gerald R. Ford International Airport

KGRR / GRR

Grand Rapids, US

Current TAF Forecast

Raw TAF:
TAF KGRR 040548Z 0406/0506 23009KT 6SM -SHRA VCTS BKN050CB TEMPO 0406/0408 4SM -TSRA BR OVC035CB FM041000 25007KT 6SM BR OVC015 FM041500 27007KT P6SM BKN035 FM042000 27009KT P6SM BKN040 PROB30 0420/0502 4SM -TSRA BR OVC035CB FM050300 05005KT P6SM BKN090

Detailed TAF Table

Parameter
Sat
11:00Z
+-1h
Sat
12:00Z
+0h
Sat
13:00Z
+1h
Sat
14:00Z
+2h
Sat
15:00Z
+3h
Sat
16:00Z
+4h
Sat
17:00Z
+5h
Sat
18:00Z
+6h
Sat
19:00Z
+7h
Sat
20:00Z
+8h
Sat
21:00Z
+9h
Sat
22:00Z
+10h
Sat
23:00Z
+11h
Sun
00:00Z
+12h
Sun
01:00Z
+13h
Sun
02:00Z
+14h
Sun
03:00Z
+15h
Sun
04:00Z
+16h
Wind Dir
230°
SW
230°
SW
230°
SW
230°
SW
270°
W
270°
W
270°
W
270°
W
270°
W
230°
SW
230°
SW
230°
SW
230°
SW
230°
SW
230°
SW
230°
SW
50°
NE
50°
NE
Wind Speed
9 kt
9 kt
9 kt
9 kt
7 kt
7 kt
7 kt
7 kt
7 kt
9 kt
9 kt
9 kt
9 kt
9 kt
9 kt
9 kt
5 kt
5 kt
Visibility
6SM
6SM
6SM
6SM
>6SM
>6SM
>6SM
>6SM
>6SM
4SM
4SM
4SM
4SM
4SM
4SM
6SM
>6SM
>6SM
Weather
Light Showers Rain
-SHRA
Light Showers Rain
-SHRA
Light Showers Rain
-SHRA
Light Showers Rain
-SHRA
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
Light Thunderstorm Rain, Mist
-TSRA BR
30%
Light Thunderstorm Rain, Mist
-TSRA BR
30%
Light Thunderstorm Rain, Mist
-TSRA BR
30%
Light Thunderstorm Rain, Mist
-TSRA BR
30%
Light Thunderstorm Rain, Mist
-TSRA BR
30%
Light Thunderstorm Rain, Mist
-TSRA BR
30%
Light Showers Rain
-SHRA
☀️ Clear
☀️ Clear
Clouds
BKN050CB
BKN050CB
BKN050CB
BKN050CB
BKN035
BKN035
BKN035
BKN035
BKN035
OVC035CB
OVC035CB
OVC035CB
OVC035CB
OVC035CB
OVC035CB
BKN050CB
BKN090
BKN090
Ceiling
5,000 ft
AGL
5,000 ft
AGL
5,000 ft
AGL
5,000 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
5,000 ft
AGL
9,000 ft
AGL
9,000 ft
AGL
Flight Rules MVFR MVFR MVFR MVFR VFR VFR VFR VFR VFR MVFR MVFR MVFR MVFR MVFR MVFR MVFR VFR VFR
Day/Night
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
🌇 19:20Z
☀️
Day
🌇 19:20Z
☀️
Day
🌇 19:20Z
🌙
Night
🌇 19:20Z
🌙
Night
🌇 19:20Z
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌅 04:40Z
🌙
Night
🌅 04:40Z
🌙
Night
🌅 04:40Z
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
MVFR
Wind
230° at 9 kt
Visibility
6SM
Weather
Light Showers Rain
Clouds
BKN050CB
📖 Plain English Explanation:

This is the base forecast condition. Winds from the Southwest (230°) at 9 kt. Visibility will be excellent at 6SM. Weather conditions: Light Showers Rain. Broken clouds at 5000 feet. Marginal VFR conditions - some restrictions for visual flying.

TEMPO 06:00Z - 08:00Z
MVFR
Visibility
4SM
Weather
Light Thunderstorm Rain, Mist
Clouds
OVC035CB
📖 Plain English Explanation:

Temporary conditions (lasting less than an hour at a time) may include: Visibility will be good at 4SM. Weather conditions: Light Thunderstorm Rain, Mist. Overcast skies at 3500 feet. Marginal VFR conditions - some restrictions for visual flying.

FM041000 10:00Z - 16:00Z
MVFR
Wind
250° at 7 kt
Visibility
6SM
Weather
Mist
Clouds
OVC015
📖 Plain English Explanation:

Winds from the West-Southwest (250°) at 7 kt. Visibility will be excellent at 6SM. Weather conditions: Mist. Overcast skies at 1500 feet. Marginal VFR conditions - some restrictions for visual flying.

FM041500 15:00Z - 21:00Z
VFR
Wind
270° at 7 kt
Visibility
>6SM
Clouds
BKN035
📖 Plain English Explanation:

Winds from the West (270°) at 7 kt. Visibility will be excellent at more than 6SM. Broken clouds at 3500 feet. Conditions will be suitable for Visual Flight Rules (VFR) operations.

FM042000 20:00Z - 02:00Z
VFR
Wind
270° at 9 kt
Visibility
>6SM
Clouds
BKN040
📖 Plain English Explanation:

Winds from the West (270°) at 9 kt. Visibility will be excellent at more than 6SM. Broken clouds at 4000 feet. Conditions will be suitable for Visual Flight Rules (VFR) operations.

PROB30 20:00Z - 02:00Z
MVFR
Visibility
4SM
Weather
Light Thunderstorm Rain, Mist
Clouds
OVC035CB
📖 Plain English Explanation:

There is a 30% probability of: Visibility will be good at 4SM. Weather conditions: Light Thunderstorm Rain, Mist. Overcast skies at 3500 feet. Marginal VFR conditions - some restrictions for visual flying.

FM050300 03:00Z - 09:00Z
VFR
Wind
50° at 5 kt
Visibility
>6SM
Clouds
BKN090
📖 Plain English Explanation:

Winds from the Northeast (50°) at 5 kt. Visibility will be excellent at more than 6SM. Broken clouds at 9000 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.