Gary Chicago International Airport

KGYY / GYY

Gary, US

Current TAF Forecast

Raw TAF:
TAF KGYY 211720Z 2118/2218 23020G30KT P6SM SCT050 SCT150 TEMPO 2120/2123 32025G35KT 3SM -TSRA SCT015 BKN040CB FM220000 24008KT P6SM SCT060 SCT250 FM220900 05006KT 3SM BR SCT005 BKN010 TEMPO 2210/2214 1SM BR BKN005

Detailed TAF Table

Parameter
Tue
19:00Z
+-1h
Tue
20:00Z
+0h
Tue
21:00Z
+1h
Tue
22:00Z
+2h
Tue
23:00Z
+3h
Wed
00:00Z
+4h
Wed
01:00Z
+5h
Wed
02:00Z
+6h
Wed
03:00Z
+7h
Wed
04:00Z
+8h
Wed
05:00Z
+9h
Wed
06:00Z
+10h
Wed
07:00Z
+11h
Wed
08:00Z
+12h
Wed
09:00Z
+13h
Wed
10:00Z
+14h
Wed
11:00Z
+15h
Wed
12:00Z
+16h
Wed
13:00Z
+17h
Wed
14:00Z
+18h
Wed
15:00Z
+19h
Wed
16:00Z
+20h
Wind Dir
230°
SW
320°
NW
320°
NW
320°
NW
230°
SW
240°
SW
240°
SW
240°
SW
240°
SW
240°
SW
240°
SW
230°
SW
230°
SW
230°
SW
50°
NE
230°
SW
230°
SW
230°
SW
230°
SW
50°
NE
230°
SW
230°
SW
Wind Speed
20 kt
G30 kt
25 kt
G35 kt
25 kt
G35 kt
25 kt
G35 kt
20 kt
G30 kt
8 kt
G30 kt
8 kt
G30 kt
8 kt
G30 kt
8 kt
G30 kt
8 kt
G30 kt
8 kt
G30 kt
20 kt
G30 kt
20 kt
G30 kt
20 kt
G30 kt
6 kt
G30 kt
20 kt
G30 kt
20 kt
G30 kt
20 kt
G30 kt
20 kt
G30 kt
6 kt
G30 kt
20 kt
G30 kt
20 kt
G30 kt
Visibility
>6SM
3SM
3SM
3SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
3SM
1SM
1SM
1SM
1SM
3SM
>6SM
>6SM
Weather
☀️ Clear
Light Thunderstorm Rain
-TSRA
Light Thunderstorm Rain
-TSRA
Light Thunderstorm Rain
-TSRA
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
Mist
BR
Mist
BR
Mist
BR
Mist
BR
Mist
BR
Mist
BR
☀️ Clear
☀️ Clear
Clouds
SCT050
SCT150
SCT015
BKN040CB
SCT015
BKN040CB
SCT015
BKN040CB
SCT050
SCT150
SCT060
SCT250
SCT060
SCT250
SCT060
SCT250
SCT060
SCT250
SCT060
SCT250
SCT060
SCT250
SCT050
SCT150
SCT050
SCT150
SCT050
SCT150
SCT005
BKN010
BKN005
BKN005
BKN005
BKN005
SCT005
BKN010
SCT050
SCT150
SCT050
SCT150
Ceiling
🌤️ Unlimited
4,000 ft
AGL
4,000 ft
AGL
4,000 ft
AGL
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
1,000 ft
AGL
500 ft
AGL
500 ft
AGL
500 ft
AGL
500 ft
AGL
1,000 ft
AGL
🌤️ Unlimited
🌤️ Unlimited
Flight Rules VFR MVFR MVFR MVFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR IFR IFR IFR IFR IFR IFR VFR VFR
Day/Night
🌇
Dusk
🌇 18:38Z
🌙
Night
🌇 18:38Z
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌅 05:20Z
🌙
Night
🌅 05:20Z
🌅
Dawn
🌅 05:20Z
☀️
Day
🌅 05:20Z
☀️
Day
🌅 05:20Z
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
🌇 18:39Z
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
VFR
Wind
230° at 20 kt
Gusts: 30 kt
Visibility
>6SM
Clouds
SCT050 SCT150
📖 Plain English Explanation:

This is the base forecast condition. Winds from the Southwest (230°) at 20 kt. Gusts up to 30 kt are expected. Visibility will be excellent at more than 6SM. Scattered clouds at 5000 feet, Scattered clouds at 15000 feet. Conditions will be suitable for Visual Flight Rules (VFR) operations.

TEMPO 20:00Z - 23:00Z
MVFR
Wind
320° at 25 kt
Gusts: 35 kt
Visibility
3SM
Weather
Light Thunderstorm Rain
Clouds
SCT015 BKN040CB
📖 Plain English Explanation:

Temporary conditions (lasting less than an hour at a time) may include: Winds from the Northwest (320°) at 25 kt. Gusts up to 35 kt are expected. Visibility will be good at 3SM. Weather conditions: Light Thunderstorm Rain. Scattered clouds at 1500 feet, Broken clouds at 4000 feet. Marginal VFR conditions - some restrictions for visual flying.

FM220000 00:00Z - 06:00Z
VFR
Wind
240° at 8 kt
Visibility
>6SM
Clouds
SCT060 SCT250
📖 Plain English Explanation:

Winds from the West-Southwest (240°) at 8 kt. Visibility will be excellent at more than 6SM. Scattered clouds at 6000 feet, Scattered clouds at 25000 feet. Conditions will be suitable for Visual Flight Rules (VFR) operations.

FM220900 09:00Z - 15:00Z
IFR
Wind
50° at 6 kt
Visibility
3SM
Weather
Mist
Clouds
SCT005 BKN010
📖 Plain English Explanation:

Winds from the Northeast (50°) at 6 kt. Visibility will be good at 3SM. Weather conditions: Mist. Scattered clouds at 500 feet, Broken clouds at 1000 feet. Instrument Flight Rules (IFR) conditions - instrument flying required.

TEMPO 10:00Z - 14:00Z
IFR
Visibility
1SM
Weather
Mist
Clouds
BKN005
📖 Plain English Explanation:

Temporary conditions (lasting less than an hour at a time) may include: Visibility will be moderate at 1SM. Weather conditions: Mist. Broken clouds at 500 feet. Instrument Flight Rules (IFR) conditions - instrument flying required.

📚 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.