Gary Chicago International Airport

KGYY / GYY

Gary, US

Current TAF Forecast

Raw TAF:
TAF KGYY 040535Z 0406/0506 VRB05KT 5SM -RA BR SCT040 OVC080 FM040700 VRB05KT P6SM FEW035 SCT120 TEMPO 0407/0408 6SM -RA BR FM041300 23008KT P6SM SCT025 SCT120 FM042000 09009KT P6SM SCT040 BKN150 TEMPO 0421/0501 2SM TSRA BR SCT015 OVC040CB FM050400 05007KT 6SM BR SCT005 BKN100

Detailed TAF Table

Parameter
Sat
07:00Z
+-1h
Sat
08:00Z
+0h
Sat
09:00Z
+1h
Sat
10:00Z
+2h
Sat
11:00Z
+3h
Sat
12:00Z
+4h
Sat
13:00Z
+5h
Sat
14:00Z
+6h
Sat
15:00Z
+7h
Sat
16:00Z
+8h
Sat
17:00Z
+9h
Sat
18:00Z
+10h
Sat
19:00Z
+11h
Sat
20:00Z
+12h
Sat
21:00Z
+13h
Sat
22:00Z
+14h
Sat
23:00Z
+15h
Sun
00:00Z
+16h
Sun
01:00Z
+17h
Sun
02:00Z
+18h
Sun
03:00Z
+19h
Sun
04:00Z
+20h
Wind Dir
VRB
VRB
VRB
VRB
VRB
VRB
230°
SW
230°
SW
230°
SW
230°
SW
230°
SW
230°
SW
VRB
90°
E
VRB
VRB
VRB
VRB
90°
E
VRB
VRB
50°
NE
Wind Speed
5 kt
5 kt
5 kt
5 kt
5 kt
5 kt
8 kt
8 kt
8 kt
8 kt
8 kt
8 kt
5 kt
9 kt
5 kt
5 kt
5 kt
5 kt
9 kt
5 kt
5 kt
7 kt
Visibility
5SM
5SM
5SM
5SM
5SM
5SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
5SM
>6SM
2SM
2SM
2SM
2SM
>6SM
5SM
5SM
6SM
Weather
Light Rain, Mist
-RA BR
Light Rain, Mist
-RA BR
Light Rain, Mist
-RA BR
Light Rain, Mist
-RA BR
Light Rain, Mist
-RA BR
Light Rain, Mist
-RA BR
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
Light Rain, Mist
-RA BR
☀️ Clear
Thunderstorm Rain, Mist
TSRA BR
Thunderstorm Rain, Mist
TSRA BR
Thunderstorm Rain, Mist
TSRA BR
Thunderstorm Rain, Mist
TSRA BR
☀️ Clear
Light Rain, Mist
-RA BR
Light Rain, Mist
-RA BR
Mist
BR
Clouds
SCT040
OVC080
SCT040
OVC080
SCT040
OVC080
SCT040
OVC080
SCT040
OVC080
SCT040
OVC080
SCT025
SCT120
SCT025
SCT120
SCT025
SCT120
SCT025
SCT120
SCT025
SCT120
SCT025
SCT120
SCT040
OVC080
SCT040
BKN150
SCT015
OVC040CB
SCT015
OVC040CB
SCT015
OVC040CB
SCT015
OVC040CB
SCT040
BKN150
SCT040
OVC080
SCT040
OVC080
SCT005
BKN100
Ceiling
8,000 ft
AGL
8,000 ft
AGL
8,000 ft
AGL
8,000 ft
AGL
8,000 ft
AGL
8,000 ft
AGL
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
8,000 ft
AGL
15,000 ft
AGL
4,000 ft
AGL
4,000 ft
AGL
4,000 ft
AGL
4,000 ft
AGL
15,000 ft
AGL
8,000 ft
AGL
8,000 ft
AGL
10,000 ft
AGL
Flight Rules MVFR MVFR MVFR MVFR MVFR MVFR VFR VFR VFR VFR VFR VFR MVFR VFR IFR IFR IFR IFR VFR MVFR MVFR VFR
Day/Night
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
🌇 19:18Z
☀️
Day
🌇 19:18Z
☀️
Day
🌇 19:18Z
🌙
Night
🌇 19:18Z
🌙
Night
🌇 19:18Z
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌅 04:42Z
🌙
Night
🌅 04:42Z
🌙
Night
🌅 04:42Z
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
VRB° at 5 kt
Visibility
5SM
Weather
Light Rain, Mist
Clouds
SCT040 OVC080
📖 Plain English Explanation:

This is the base forecast condition. Winds will be variable in direction at 5 kt. Visibility will be good at 5SM. Weather conditions: Light Rain, Mist. Scattered clouds at 4000 feet, Overcast skies at 8000 feet. Marginal VFR conditions - some restrictions for visual flying.

FM040700 07:00Z - 13:00Z
VFR
Wind
VRB° at 5 kt
Visibility
>6SM
Clouds
FEW035 SCT120
📖 Plain English Explanation:

Winds will be variable in direction at 5 kt. Visibility will be excellent at more than 6SM. Few clouds at 3500 feet, Scattered clouds at 12000 feet. Conditions will be suitable for Visual Flight Rules (VFR) operations.

TEMPO 07:00Z - 08:00Z
VFR
Visibility
6SM
Weather
Light Rain, Mist
📖 Plain English Explanation:

Temporary conditions (lasting less than an hour at a time) may include: Visibility will be excellent at 6SM. Weather conditions: Light Rain, Mist. Conditions will be suitable for Visual Flight Rules (VFR) operations.

FM041300 13:00Z - 19:00Z
VFR
Wind
230° at 8 kt
Visibility
>6SM
Clouds
SCT025 SCT120
📖 Plain English Explanation:

Winds from the Southwest (230°) at 8 kt. Visibility will be excellent at more than 6SM. Scattered clouds at 2500 feet, Scattered clouds at 12000 feet. Conditions will be suitable for Visual Flight Rules (VFR) operations.

FM042000 20:00Z - 02:00Z
VFR
Wind
90° at 9 kt
Visibility
>6SM
Clouds
SCT040 BKN150
📖 Plain English Explanation:

Winds from the East (90°) at 9 kt. Visibility will be excellent at more than 6SM. Scattered clouds at 4000 feet, Broken clouds at 15000 feet. Conditions will be suitable for Visual Flight Rules (VFR) operations.

TEMPO 21:00Z - 01:00Z
IFR
Visibility
2SM
Weather
Thunderstorm Rain, Mist
Clouds
SCT015 OVC040CB
📖 Plain English Explanation:

Temporary conditions (lasting less than an hour at a time) may include: Visibility will be moderate at 2SM. Weather conditions: Thunderstorm Rain, Mist. Scattered clouds at 1500 feet, Overcast skies at 4000 feet. Instrument Flight Rules (IFR) conditions - instrument flying required.

FM050400 04:00Z - 10:00Z
VFR
Wind
50° at 7 kt
Visibility
6SM
Weather
Mist
Clouds
SCT005 BKN100
📖 Plain English Explanation:

Winds from the Northeast (50°) at 7 kt. Visibility will be excellent at 6SM. Weather conditions: Mist. Scattered clouds at 500 feet, Broken clouds at 10000 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.