Gerald R. Ford International Airport

KGRR / GRR

Grand Rapids, US

Current TAF Forecast

Raw TAF:
TAF KGRR 271957Z 2720/2818 12008KT 1 1/2SM TSRA BR OVC035CB TEMPO 2720/2721 4SM TSRA BR FM272100 17009KT P6SM BKN070 FM280200 VRB04KT 6SM BR SCT012 FM280700 36008KT 5SM BR BKN007 FM281500 36012G21KT P6SM SCT010 BKN035

Detailed TAF Table

Parameter
Mon
20:00Z
+-1h
Mon
21:00Z
+0h
Mon
22:00Z
+1h
Mon
23:00Z
+2h
Tue
00:00Z
+3h
Tue
01:00Z
+4h
Tue
02:00Z
+5h
Tue
03:00Z
+6h
Tue
04:00Z
+7h
Tue
05:00Z
+8h
Tue
06:00Z
+9h
Tue
07:00Z
+10h
Tue
08:00Z
+11h
Tue
09:00Z
+12h
Tue
10:00Z
+13h
Tue
11:00Z
+14h
Tue
12:00Z
+15h
Tue
13:00Z
+16h
Tue
14:00Z
+17h
Tue
15:00Z
+18h
Tue
16:00Z
+19h
Wind Dir
120°
SE
170°
S
170°
S
170°
S
170°
S
170°
S
VRB
VRB
VRB
VRB
VRB
360°
N
360°
N
360°
N
360°
N
360°
N
360°
N
120°
SE
120°
SE
360°
N
360°
N
Wind Speed
8 kt
9 kt
9 kt
9 kt
9 kt
9 kt
4 kt
4 kt
4 kt
4 kt
4 kt
8 kt
8 kt
8 kt
8 kt
8 kt
8 kt
8 kt
8 kt
12 kt
G21 kt
12 kt
G21 kt
Visibility
1/2SM
>6SM
>6SM
>6SM
>6SM
>6SM
6SM
6SM
6SM
6SM
6SM
5SM
5SM
5SM
5SM
5SM
5SM
1/2SM
1/2SM
>6SM
>6SM
Weather
Thunderstorm Rain, Mist
TSRA BR
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
Mist
BR
Mist
BR
Mist
BR
Mist
BR
Mist
BR
Mist
BR
Mist
BR
Mist
BR
Mist
BR
Mist
BR
Mist
BR
Thunderstorm Rain, Mist
TSRA BR
Thunderstorm Rain, Mist
TSRA BR
☀️ Clear
☀️ Clear
Clouds
OVC035CB
BKN070
BKN070
BKN070
BKN070
BKN070
SCT012
SCT012
SCT012
SCT012
SCT012
BKN007
BKN007
BKN007
BKN007
BKN007
BKN007
OVC035CB
OVC035CB
SCT010
BKN035
SCT010
BKN035
Ceiling
3,500 ft
AGL
7,000 ft
AGL
7,000 ft
AGL
7,000 ft
AGL
7,000 ft
AGL
7,000 ft
AGL
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
700 ft
AGL
700 ft
AGL
700 ft
AGL
700 ft
AGL
700 ft
AGL
700 ft
AGL
3,500 ft
AGL
3,500 ft
AGL
3,500 ft
AGL
3,500 ft
AGL
Flight Rules IFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR IFR IFR IFR IFR IFR IFR IFR IFR VFR VFR
Day/Night
🌙
Night
🌇 19:07Z
🌙
Night
🌇 19:07Z
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌅 04:53Z
🌙
Night
🌅 04:53Z
🌙
Night
🌅 04:53Z
☀️
Day
🌅 04:53Z
☀️
Day
🌅 04:53Z
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
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 occurrenceAGL: Above Ground Level

Forecast Periods

BASE
IFR
Wind
120° at 8 kt
Visibility
1/2SM
Weather
Thunderstorm Rain, Mist
Clouds
OVC035CB
📖 Plain English Explanation:

This is the base forecast condition. Winds from the East-Southeast (120°) at 8 kt. Visibility will be moderate at 1/2SM. Weather conditions: Thunderstorm Rain, Mist. Overcast skies at 3500 feet. Instrument Flight Rules (IFR) conditions - instrument flying required.

TEMPO 20:00Z - 21:00Z
MVFR
Visibility
4SM
Weather
Thunderstorm Rain, Mist
📖 Plain English Explanation:

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

FM272100 21:00Z - 03:00Z
VFR
Wind
170° at 9 kt
Visibility
>6SM
Clouds
BKN070
📖 Plain English Explanation:

Winds from the South (170°) at 9 kt. Visibility will be excellent at more than 6SM. Broken clouds at 7000 feet. Conditions will be suitable for Visual Flight Rules (VFR) operations.

FM280200 02:00Z - 08:00Z
VFR
Wind
VRB° at 4 kt
Visibility
6SM
Weather
Mist
Clouds
SCT012
📖 Plain English Explanation:

Winds will be variable in direction at 4 kt. Visibility will be excellent at 6SM. Weather conditions: Mist. Scattered clouds at 1200 feet. Conditions will be suitable for Visual Flight Rules (VFR) operations.

FM280700 07:00Z - 13:00Z
IFR
Wind
360° at 8 kt
Visibility
5SM
Weather
Mist
Clouds
BKN007
📖 Plain English Explanation:

Winds from the North (360°) at 8 kt. Visibility will be good at 5SM. Weather conditions: Mist. Broken clouds at 700 feet. Instrument Flight Rules (IFR) conditions - instrument flying required.

FM281500 15:00Z - 21:00Z
VFR
Wind
360° at 12 kt
Gusts: 21 kt
Visibility
>6SM
Clouds
SCT010 BKN035
📖 Plain English Explanation:

Winds from the North (360°) at 12 kt. Gusts up to 21 kt are expected. Visibility will be excellent at more than 6SM. Scattered clouds at 1000 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.