Gary Chicago International Airport

KGYY / GYY

Gary, US

Current TAF Forecast

Raw TAF:
TAF KGYY 041723Z 0418/0518 08007KT 5SM BR BKN025 FM042200 04006KT 3SM BR SCT004 OVC008 TEMPO 0422/0502 2SM -SHRADZ BR BKN003 FM050200 VRB03KT 2SM -SHRADZ BR SCT002 OVC004 FM050700 04005KT 1 1/2SM -SHRADZ BR SCT002 OVC003 PROB30 0510/0516 1/2SM -RADZ FG VV002

Detailed TAF Table

Parameter
Wed
19:00Z
+-1h
Wed
20:00Z
+0h
Wed
21:00Z
+1h
Wed
22:00Z
+2h
Wed
23:00Z
+3h
Thu
00:00Z
+4h
Thu
01:00Z
+5h
Thu
02:00Z
+6h
Thu
03:00Z
+7h
Thu
04:00Z
+8h
Thu
05:00Z
+9h
Thu
06:00Z
+10h
Thu
07:00Z
+11h
Thu
08:00Z
+12h
Thu
09:00Z
+13h
Thu
10:00Z
+14h
Thu
11:00Z
+15h
Thu
12:00Z
+16h
Thu
13:00Z
+17h
Thu
14:00Z
+18h
Thu
15:00Z
+19h
Thu
16:00Z
+20h
Wind Dir
80°
E
80°
E
80°
E
80°
E
80°
E
80°
E
80°
E
VRB
VRB
VRB
VRB
VRB
40°
NE
40°
NE
40°
NE
80°
E
80°
E
80°
E
80°
E
80°
E
80°
E
80°
E
Wind Speed
7 kt
7 kt
7 kt
7 kt
7 kt
7 kt
7 kt
3 kt
3 kt
3 kt
3 kt
3 kt
5 kt
5 kt
5 kt
7 kt
7 kt
7 kt
7 kt
7 kt
7 kt
7 kt
Visibility
5SM
5SM
5SM
2SM
2SM
2SM
2SM
2SM
2SM
2SM
2SM
2SM
1/2SM
1/2SM
1/2SM
1/2SM
1/2SM
1/2SM
1/2SM
1/2SM
1/2SM
5SM
Weather
Mist
BR
Mist
BR
Mist
BR
Light Showers RADZ, Mist
-SHRADZ BR
Light Showers RADZ, Mist
-SHRADZ BR
Light Showers RADZ, Mist
-SHRADZ BR
Light Showers RADZ, Mist
-SHRADZ BR
Light Showers RADZ, Mist
-SHRADZ BR
Light Showers RADZ, Mist
-SHRADZ BR
Light Showers RADZ, Mist
-SHRADZ BR
Light Showers RADZ, Mist
-SHRADZ BR
Light Showers RADZ, Mist
-SHRADZ BR
Light Showers RADZ, Mist
-SHRADZ BR
Light Showers RADZ, Mist
-SHRADZ BR
Light Showers RADZ, Mist
-SHRADZ BR
Light RADZ, Fog
-RADZ FG
30%
Light RADZ, Fog
-RADZ FG
30%
Light RADZ, Fog
-RADZ FG
30%
Light RADZ, Fog
-RADZ FG
30%
Light RADZ, Fog
-RADZ FG
30%
Light RADZ, Fog
-RADZ FG
30%
Mist
BR
Clouds
BKN025
BKN025
BKN025
BKN003
BKN003
BKN003
BKN003
SCT002
OVC004
SCT002
OVC004
SCT002
OVC004
SCT002
OVC004
SCT002
OVC004
SCT002
OVC003
SCT002
OVC003
SCT002
OVC003
VV002
VV002
VV002
VV002
VV002
VV002
BKN025
Ceiling
2,500 ft
AGL
2,500 ft
AGL
2,500 ft
AGL
300 ft
AGL
300 ft
AGL
300 ft
AGL
300 ft
AGL
400 ft
AGL
400 ft
AGL
400 ft
AGL
400 ft
AGL
400 ft
AGL
300 ft
AGL
300 ft
AGL
300 ft
AGL
200 ft 🌫️
Indefinite
200 ft 🌫️
Indefinite
200 ft 🌫️
Indefinite
200 ft 🌫️
Indefinite
200 ft 🌫️
Indefinite
200 ft 🌫️
Indefinite
2,500 ft
AGL
Flight Rules MVFR MVFR MVFR LIFR LIFR LIFR LIFR LIFR LIFR LIFR LIFR LIFR LIFR LIFR LIFR LIFR LIFR LIFR LIFR LIFR LIFR MVFR
Day/Night
🌙
Night
🌇 17:34Z
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌅 06:24Z
🌙
Night
🌅 06:24Z
🌅
Dawn
🌅 06:24Z
☀️
Day
🌅 06:24Z
☀️
Day
🌅 06:24Z
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
🌇 17:35Z
☀️
Day
🌇 17:35Z
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
80° at 7 kt
Visibility
5SM
Weather
Mist
Clouds
BKN025
📖 Plain English Explanation:

This is the base forecast condition. Winds from the East (80°) at 7 kt. Visibility will be good at 5SM. Weather conditions: Mist. Broken clouds at 2500 feet. Marginal VFR conditions - some restrictions for visual flying.

FM042200 22:00Z - 04:00Z
IFR
Wind
40° at 6 kt
Visibility
3SM
Weather
Mist
Clouds
SCT004 OVC008
📖 Plain English Explanation:

Winds from the Northeast (40°) at 6 kt. Visibility will be good at 3SM. Weather conditions: Mist. Scattered clouds at 400 feet, Overcast skies at 800 feet. Instrument Flight Rules (IFR) conditions - instrument flying required.

TEMPO 22:00Z - 02:00Z
LIFR
Visibility
2SM
Weather
Light Showers RADZ, Mist
Clouds
BKN003
📖 Plain English Explanation:

Temporary conditions (lasting less than an hour at a time) may include: Visibility will be moderate at 2SM. Weather conditions: Light Showers RADZ, Mist. Broken clouds at 300 feet. Low IFR conditions - challenging even for instrument operations.

FM050200 02:00Z - 08:00Z
LIFR
Wind
VRB° at 3 kt
Visibility
2SM
Weather
Light Showers RADZ, Mist
Clouds
SCT002 OVC004
📖 Plain English Explanation:

Winds will be variable in direction at 3 kt. Visibility will be moderate at 2SM. Weather conditions: Light Showers RADZ, Mist. Scattered clouds at 200 feet, Overcast skies at 400 feet. Low IFR conditions - challenging even for instrument operations.

FM050700 07:00Z - 13:00Z
LIFR
Wind
40° at 5 kt
Visibility
1/2SM
Weather
Light Showers RADZ, Mist
Clouds
SCT002 OVC003
📖 Plain English Explanation:

Winds from the Northeast (40°) at 5 kt. Visibility will be moderate at 1/2SM. Weather conditions: Light Showers RADZ, Mist. Scattered clouds at 200 feet, Overcast skies at 300 feet. Low IFR conditions - challenging even for instrument operations.

PROB30 10:00Z - 16:00Z
LIFR
Visibility
1/2SM
Weather
Light RADZ, Fog
Clouds
VV002
📖 Plain English Explanation:

There is a 30% probability of: Visibility will be moderate at 1/2SM. Weather conditions: Light RADZ, Fog. Vertical visibility at 200 feet. Low IFR conditions - challenging even for instrument 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.