Gerald R. Ford International Airport

KGRR / GRR

Grand Rapids, US

Current TAF Forecast

Raw TAF:
TAF KGRR 171720Z 1718/1818 24014G24KT 4SM -SHSN OVC015 FM172300 23010G19KT 2SM -SHSN BKN016 FM180800 26007KT 3SM -SHSN BKN015

Detailed TAF Table

Parameter
Sat
21:00Z
+-1h
Sat
22:00Z
+0h
Sat
23:00Z
+1h
Sun
00:00Z
+2h
Sun
01:00Z
+3h
Sun
02:00Z
+4h
Sun
03:00Z
+5h
Sun
04:00Z
+6h
Sun
05:00Z
+7h
Sun
06:00Z
+8h
Sun
07:00Z
+9h
Sun
08:00Z
+10h
Sun
09:00Z
+11h
Sun
10:00Z
+12h
Sun
11:00Z
+13h
Sun
12:00Z
+14h
Sun
13:00Z
+15h
Sun
14:00Z
+16h
Sun
15:00Z
+17h
Sun
16:00Z
+18h
Wind Dir
240°
SW
240°
SW
230°
SW
230°
SW
230°
SW
230°
SW
230°
SW
230°
SW
240°
SW
240°
SW
240°
SW
260°
W
260°
W
260°
W
260°
W
260°
W
260°
W
240°
SW
240°
SW
240°
SW
Wind Speed
14kt
G24kt
14kt
G24kt
10kt
G19kt
10kt
G19kt
10kt
G19kt
10kt
G19kt
10kt
G19kt
10kt
G19kt
14kt
G24kt
14kt
G24kt
14kt
G24kt
7kt
G24kt
7kt
G24kt
7kt
G24kt
7kt
G24kt
7kt
G24kt
7kt
G24kt
14kt
G24kt
14kt
G24kt
14kt
G24kt
Visibility
4SM
4SM
2SM
2SM
2SM
2SM
2SM
2SM
4SM
4SM
4SM
3SM
3SM
3SM
3SM
3SM
3SM
4SM
4SM
4SM
Weather
Light Showers Snow
-SHSN
Light Showers Snow
-SHSN
Light Showers Snow
-SHSN
Light Showers Snow
-SHSN
Light Showers Snow
-SHSN
Light Showers Snow
-SHSN
Light Showers Snow
-SHSN
Light Showers Snow
-SHSN
Light Showers Snow
-SHSN
Light Showers Snow
-SHSN
Light Showers Snow
-SHSN
Light Showers Snow
-SHSN
Light Showers Snow
-SHSN
Light Showers Snow
-SHSN
Light Showers Snow
-SHSN
Light Showers Snow
-SHSN
Light Showers Snow
-SHSN
Light Showers Snow
-SHSN
Light Showers Snow
-SHSN
Light Showers Snow
-SHSN
Clouds
OVC015
OVC015
BKN016
BKN016
BKN016
BKN016
BKN016
BKN016
OVC015
OVC015
OVC015
BKN015
BKN015
BKN015
BKN015
BKN015
BKN015
OVC015
OVC015
OVC015
Ceiling
1500ft
AGL
1500ft
AGL
1600ft
AGL
1600ft
AGL
1600ft
AGL
1600ft
AGL
1600ft
AGL
1600ft
AGL
1500ft
AGL
1500ft
AGL
1500ft
AGL
1500ft
AGL
1500ft
AGL
1500ft
AGL
1500ft
AGL
1500ft
AGL
1500ft
AGL
1500ft
AGL
1500ft
AGL
1500ft
AGL
Flight Rules MVFR MVFR IFR IFR IFR IFR IFR IFR MVFR MVFR MVFR MVFR MVFR MVFR MVFR MVFR MVFR MVFR MVFR MVFR
Day/Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌅 07:12
🌙
Night
🌅 07:12
🌅
Dawn
🌅 07:12
☀️
Day
🌅 07:12
☀️
Day
🌅 07:12
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
🌇 16:47
☀️
Day
🌇 16:47
☀️
Day
🌇 16:47
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
240° at 14 kt
Gusts: 24 kt
Visibility
4SM
Weather
Light Showers Snow
Clouds
OVC015
📖 Plain English Explanation:

This is the base forecast condition. Winds from the West-Southwest (240°) at 14kt. Gusts up to 24kt are expected. Visibility will be good at 4SM. Weather conditions: Light Showers Snow. Overcast skies at 1500 feet. Marginal VFR conditions - some restrictions for visual flying.

FM172300 2026-01-17 23:00:00 - 2026-01-18 05:00:00
IFR
Wind
230° at 10 kt
Gusts: 19 kt
Visibility
2SM
Weather
Light Showers Snow
Clouds
BKN016
📖 Plain English Explanation:

Winds from the Southwest (230°) at 10kt. Gusts up to 19kt are expected. Visibility will be moderate at 2SM. Weather conditions: Light Showers Snow. Broken clouds at 1600 feet. Instrument Flight Rules (IFR) conditions - instrument flying required.

FM180800 2026-01-18 08:00:00 - 2026-01-18 14:00:00
MVFR
Wind
260° at 7 kt
Visibility
3SM
Weather
Light Showers Snow
Clouds
BKN015
📖 Plain English Explanation:

Winds from the West (260°) at 7kt. Visibility will be good at 3SM. Weather conditions: Light Showers Snow. Broken clouds at 1500 feet. Marginal VFR conditions - some restrictions for visual flying.

📚 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.