Gary Chicago International Airport

KGYY / GYY

Gary, US

Current TAF Forecast

Raw TAF:
TAF KGYY 042100Z 0421/0518 04010KT 6SM -SHRA VCTS SCT015 BKN035CB TEMPO 0422/0424 VRB20G35KT 2SM TSRA BR BKN015 OVC035CB FM050100 04007KT P6SM SCT015 BKN100 FM050400 01007KT 6SM BR SCT005 SCT025 BKN100

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
40°
NE
VRB
VRB
40°
NE
40°
NE
40°
NE
40°
NE
10°
N
10°
N
10°
N
10°
N
10°
N
10°
N
40°
NE
40°
NE
40°
NE
40°
NE
40°
NE
40°
NE
40°
NE
Wind Speed
10 kt
20 kt
G35 kt
20 kt
G35 kt
10 kt
7 kt
7 kt
7 kt
7 kt
7 kt
7 kt
7 kt
7 kt
7 kt
10 kt
10 kt
10 kt
10 kt
10 kt
10 kt
10 kt
Visibility
6SM
2SM
2SM
6SM
>6SM
>6SM
>6SM
6SM
6SM
6SM
6SM
6SM
6SM
6SM
6SM
6SM
6SM
6SM
6SM
6SM
Weather
Light Showers Rain
-SHRA
Thunderstorm Rain, Mist
TSRA BR
Thunderstorm Rain, Mist
TSRA BR
Light Showers Rain
-SHRA
☀️ Clear
☀️ Clear
☀️ Clear
Mist
BR
Mist
BR
Mist
BR
Mist
BR
Mist
BR
Mist
BR
Light Showers Rain
-SHRA
Light Showers Rain
-SHRA
Light Showers Rain
-SHRA
Light Showers Rain
-SHRA
Light Showers Rain
-SHRA
Light Showers Rain
-SHRA
Light Showers Rain
-SHRA
Clouds
SCT015
BKN035CB
BKN015
OVC035CB
BKN015
OVC035CB
SCT015
BKN035CB
SCT015
BKN100
SCT015
BKN100
SCT015
BKN100
SCT005
SCT025
SCT005
SCT025
SCT005
SCT025
SCT005
SCT025
SCT005
SCT025
SCT005
SCT025
SCT015
BKN035CB
SCT015
BKN035CB
SCT015
BKN035CB
SCT015
BKN035CB
SCT015
BKN035CB
SCT015
BKN035CB
SCT015
BKN035CB
Ceiling
3,500 ft
AGL
1,500 ft
AGL
1,500 ft
AGL
3,500 ft
AGL
10,000 ft
AGL
10,000 ft
AGL
10,000 ft
AGL
10,000 ft
AGL
10,000 ft
AGL
10,000 ft
AGL
10,000 ft
AGL
10,000 ft
AGL
10,000 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
Flight Rules MVFR IFR IFR MVFR VFR VFR VFR VFR VFR VFR VFR VFR VFR MVFR MVFR MVFR MVFR MVFR MVFR MVFR
Day/Night
🌙
Night
🌇 19:18Z
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌅 04:42Z
🌙
Night
🌅 04:42Z
🌙
Night
🌅 04:42Z
☀️
Day
🌅 04:42Z
☀️
Day
🌅 04:42Z
☀️
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
MVFR
Wind
40° at 10 kt
Visibility
6SM
Weather
Light Showers Rain
Clouds
SCT015 BKN035CB
📖 Plain English Explanation:

This is the base forecast condition. Winds from the Northeast (40°) at 10 kt. Visibility will be excellent at 6SM. Weather conditions: Light Showers Rain. Scattered clouds at 1500 feet, Broken clouds at 3500 feet. Marginal VFR conditions - some restrictions for visual flying.

TEMPO 22:00Z - 00:00Z
IFR
Wind
VRB° at 20 kt
Gusts: 35 kt
Visibility
2SM
Weather
Thunderstorm Rain, Mist
Clouds
BKN015 OVC035CB
📖 Plain English Explanation:

Temporary conditions (lasting less than an hour at a time) may include: Winds will be variable in direction at 20 kt. Gusts up to 35 kt are expected. Visibility will be moderate at 2SM. Weather conditions: Thunderstorm Rain, Mist. Broken clouds at 1500 feet, Overcast skies at 3500 feet. Instrument Flight Rules (IFR) conditions - instrument flying required.

FM050100 01:00Z - 07:00Z
VFR
Wind
40° at 7 kt
Visibility
>6SM
Clouds
SCT015 BKN100
📖 Plain English Explanation:

Winds from the Northeast (40°) at 7 kt. Visibility will be excellent at more than 6SM. Scattered clouds at 1500 feet, Broken clouds at 10000 feet. Conditions will be suitable for Visual Flight Rules (VFR) operations.

FM050400 04:00Z - 10:00Z
VFR
Wind
10° at 7 kt
Visibility
6SM
Weather
Mist
Clouds
SCT005 SCT025 BKN100
📖 Plain English Explanation:

Winds from the North (10°) at 7 kt. Visibility will be excellent at 6SM. Weather conditions: Mist. Scattered clouds at 500 feet, Scattered clouds at 2500 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.