Gray Army Air Field

KGRF / GRF

Fort Lewis/Tacoma, US

Current TAF Forecast

Raw TAF:
TAF KGRF 142100Z 1421/1603 20012G22KT 9000 -RA BKN030 OVC045 650509 510003 QNH3010INS BECMG 1423/1424 20010G15KT 9000 -SHRA BKN020 OVC030 640507 510009 QNH3009INS TEMPO 1500/1502 6000 SHRA OVC012 BECMG 1506/1507 17006KT 9999 VCSH SCT020 QNH3010INS BECMG 1516/1517 18012KT 9000 -RA BKN015 OVC023 650409 QNH3010INS BECMG 1520/1521 19012G18KT 6000 SHRA BKN009 OVC015 640509 510009 QNH3006INS BECMG 1523/1524 19012G18KT 9000 -SHRA BKN015 OVC023 640509 510009 QNH3004INS TX14/1423Z TN07/1513Z

Detailed TAF Table

Parameter
Fri
03:00Z
+-1h
Fri
04:00Z
+0h
Fri
05:00Z
+1h
Fri
06:00Z
+2h
Fri
07:00Z
+3h
Fri
08:00Z
+4h
Fri
09:00Z
+5h
Fri
10:00Z
+6h
Fri
11:00Z
+7h
Fri
12:00Z
+8h
Fri
13:00Z
+9h
Fri
14:00Z
+10h
Fri
15:00Z
+11h
Fri
16:00Z
+12h
Fri
17:00Z
+13h
Fri
18:00Z
+14h
Fri
19:00Z
+15h
Fri
20:00Z
+16h
Fri
21:00Z
+17h
Fri
22:00Z
+18h
Fri
23:00Z
+19h
Sat
00:00Z
+20h
Sat
01:00Z
+21h
Wind Dir
200°
S
200°
S
200°
S
170°
S
170°
S
170°
S
170°
S
170°
S
170°
S
170°
S
170°
S
170°
S
170°
S
180°
S
180°
S
180°
S
180°
S
190°
S
190°
S
190°
S
190°
S
190°
S
190°
S
Wind Speed
12 kt
G22 kt
12 kt
G22 kt
12 kt
G22 kt
6 kt
G22 kt
6 kt
G22 kt
6 kt
G22 kt
6 kt
G22 kt
6 kt
G22 kt
6 kt
G22 kt
6 kt
G22 kt
6 kt
G22 kt
6 kt
G22 kt
6 kt
G22 kt
12 kt
G22 kt
12 kt
G22 kt
12 kt
G22 kt
12 kt
G22 kt
12 kt
G18 kt
12 kt
G18 kt
12 kt
G18 kt
12 kt
G18 kt
12 kt
G18 kt
12 kt
G18 kt
Visibility
9 km
9 km
9 km
10+ km
10+ km
10+ km
10+ km
10+ km
10+ km
10+ km
10+ km
10+ km
10+ km
9 km
9 km
9 km
9 km
6 km
6 km
6 km
9 km
9 km
9 km
Weather
Light Rain
-RA
Light Rain
-RA
Light Rain
-RA
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
Light Rain
-RA
Light Rain
-RA
Light Rain
-RA
Light Rain
-RA
Showers Rain
SHRA
Showers Rain
SHRA
Showers Rain
SHRA
Light Showers Rain
-SHRA
Light Showers Rain
-SHRA
Light Showers Rain
-SHRA
Clouds
BKN030
OVC045
BKN030
OVC045
BKN030
OVC045
SCT020
SCT020
SCT020
SCT020
SCT020
SCT020
SCT020
SCT020
SCT020
SCT020
BKN015
OVC023
BKN015
OVC023
BKN015
OVC023
BKN015
OVC023
BKN009
OVC015
BKN009
OVC015
BKN009
OVC015
BKN015
OVC023
BKN015
OVC023
BKN015
OVC023
Ceiling
3,000 ft
AGL
3,000 ft
AGL
3,000 ft
AGL
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
1,500 ft
AGL
1,500 ft
AGL
1,500 ft
AGL
1,500 ft
AGL
900 ft
AGL
900 ft
AGL
900 ft
AGL
1,500 ft
AGL
1,500 ft
AGL
1,500 ft
AGL
Flight Rules VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR MVFR MVFR MVFR MVFR IFR IFR IFR MVFR MVFR MVFR
Day/Night
🌙
Night
🌅 04:50Z
🌙
Night
🌅 04:50Z
☀️
Day
🌅 04:50Z
☀️
Day
🌅 04:50Z
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
🌇 19:09Z
☀️
Day
🌇 19:09Z
☀️
Day
🌇 19:09Z
🌙
Night
🌇 19:09Z
🌙
Night
🌇 19:09Z
🌙
Night
🌙
Night
🌙
Night
🌙
Night
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 occurrence • AGL: Above Ground Level

Forecast Periods

BASE
VFR
Wind
200° at 12 kt
Gusts: 22 kt
Visibility
9 km
Weather
Light Rain
Clouds
BKN030 OVC045
📖 Plain English Explanation:

This is the base forecast condition. Winds from the South-Southwest (200°) at 12 kt. Gusts up to 22 kt are expected. Visibility will be good at 9 km. Weather conditions: Light Rain. Broken clouds at 3000 feet, Overcast skies at 4500 feet. Conditions will be suitable for Visual Flight Rules (VFR) operations.

BECMG 23:00Z - 00:00Z
MVFR
Wind
200° at 10 kt
Gusts: 15 kt
Visibility
9 km
Weather
Light Showers Rain
Clouds
BKN020 OVC030
📖 Plain English Explanation:

Conditions will gradually change to become: Winds from the South-Southwest (200°) at 10 kt. Gusts up to 15 kt are expected. Visibility will be good at 9 km. Weather conditions: Light Showers Rain. Broken clouds at 2000 feet, Overcast skies at 3000 feet. Marginal VFR conditions - some restrictions for visual flying.

TEMPO 00:00Z - 02:00Z
IFR
Visibility
6 km
Weather
Showers Rain
Clouds
OVC012
📖 Plain English Explanation:

Temporary conditions (lasting less than an hour at a time) may include: Visibility will be good at 6 km. Weather conditions: Showers Rain. Overcast skies at 1200 feet. Instrument Flight Rules (IFR) conditions - instrument flying required.

BECMG 06:00Z - 07:00Z
VFR
Wind
170° at 6 kt
Visibility
10+ km
Clouds
SCT020
📖 Plain English Explanation:

Conditions will gradually change to become: Winds from the South (170°) at 6 kt. Visibility will be excellent at 10+ km. Scattered clouds at 2000 feet. Conditions will be suitable for Visual Flight Rules (VFR) operations.

BECMG 16:00Z - 17:00Z
MVFR
Wind
180° at 12 kt
Visibility
9 km
Weather
Light Rain
Clouds
BKN015 OVC023
📖 Plain English Explanation:

Conditions will gradually change to become: Winds from the South (180°) at 12 kt. Visibility will be good at 9 km. Weather conditions: Light Rain. Broken clouds at 1500 feet, Overcast skies at 2300 feet. Marginal VFR conditions - some restrictions for visual flying.

BECMG 20:00Z - 21:00Z
IFR
Wind
190° at 12 kt
Gusts: 18 kt
Visibility
6 km
Weather
Showers Rain
Clouds
BKN009 OVC015
📖 Plain English Explanation:

Conditions will gradually change to become: Winds from the South (190°) at 12 kt. Gusts up to 18 kt are expected. Visibility will be good at 6 km. Weather conditions: Showers Rain. Broken clouds at 900 feet, Overcast skies at 1500 feet. Instrument Flight Rules (IFR) conditions - instrument flying required.

BECMG 23:00Z - 00:00Z
MVFR
Wind
190° at 12 kt
Gusts: 18 kt
Visibility
9 km
Weather
Light Showers Rain
Clouds
BKN015 OVC023
📖 Plain English Explanation:

Conditions will gradually change to become: Winds from the South (190°) at 12 kt. Gusts up to 18 kt are expected. Visibility will be good at 9 km. Weather conditions: Light Showers Rain. Broken clouds at 1500 feet, Overcast skies at 2300 feet. Marginal VFR conditions - some restrictions for visual flying.

📚 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.