Gray Army Air Field

KGRF / GRF

Fort Lewis/Tacoma, US

Current TAF Forecast

Raw TAF:
TAF KGRF 242100Z 2421/2603 24005KT 9999 SKC QNH2985INS BECMG 2501/2502 26010G15KT 9999 SKC 510309 QNH2986INS BECMG 2507/2508 20009KT 9999 BKN013 QNH2991INS BECMG 2510/2511 19009KT 9999 OVC012 QNH2992INS BECMG 2515/2516 20010G15KT 9999 BKN020 510006 QNH2993INS BECMG 2517/2518 21012G18KT 9999 BKN030 BKN080 510009 QNH2994INS BECMG 2520/2521 22012G19KT 9999 BKN040 BKN060 OVC080 510003 QNH2994INS BECMG 2602/2603 22010G15KT 9999 SCT040 BKN060 OVC080 QNH2996INS TX27/2423Z TN13/2512Z

Detailed TAF Table

Parameter
Fri
23:00Z
+-1h
Sat
00:00Z
+0h
Sat
01:00Z
+1h
Sat
02:00Z
+2h
Sat
03:00Z
+3h
Sat
04:00Z
+4h
Sat
05:00Z
+5h
Sat
06:00Z
+6h
Sat
07:00Z
+7h
Sat
08:00Z
+8h
Sat
09:00Z
+9h
Sat
10:00Z
+10h
Sat
11:00Z
+11h
Sat
12:00Z
+12h
Sat
13:00Z
+13h
Sat
14:00Z
+14h
Sat
15:00Z
+15h
Sat
16:00Z
+16h
Sat
17:00Z
+17h
Sat
18:00Z
+18h
Sat
19:00Z
+19h
Sat
20:00Z
+20h
Sat
21:00Z
+21h
Sat
22:00Z
+22h
Sat
23:00Z
+23h
Sun
00:00Z
+24h
Sun
01:00Z
+25h
Wind Dir
240°
SW
240°
SW
260°
W
260°
W
260°
W
260°
W
260°
W
260°
W
200°
S
200°
S
200°
S
190°
S
190°
S
190°
S
190°
S
190°
S
200°
S
200°
S
210°
SW
210°
SW
210°
SW
220°
SW
220°
SW
220°
SW
220°
SW
220°
SW
220°
SW
Wind Speed
5 kt
5 kt
10 kt
G15 kt
10 kt
G15 kt
10 kt
G15 kt
10 kt
G15 kt
10 kt
G15 kt
10 kt
G15 kt
9 kt
G15 kt
9 kt
G15 kt
9 kt
G15 kt
9 kt
G15 kt
9 kt
G15 kt
9 kt
G15 kt
9 kt
G15 kt
9 kt
G15 kt
10 kt
G15 kt
10 kt
G15 kt
12 kt
G18 kt
12 kt
G18 kt
12 kt
G18 kt
12 kt
G19 kt
12 kt
G19 kt
12 kt
G19 kt
12 kt
G19 kt
12 kt
G19 kt
12 kt
G19 kt
Visibility
10+ km
10+ km
10+ km
10+ km
10+ km
10+ km
10+ km
10+ km
10+ km
10+ km
10+ km
10+ km
10+ km
10+ km
10+ km
10+ km
10+ km
10+ km
10+ km
10+ km
10+ km
10+ km
10+ km
10+ km
10+ km
10+ km
10+ km
Weather
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
Clouds
CLR
CLR
CLR
CLR
CLR
CLR
CLR
CLR
BKN013
BKN013
BKN013
OVC012
OVC012
OVC012
OVC012
OVC012
BKN020
BKN020
BKN030
BKN080
BKN030
BKN080
BKN030
BKN080
BKN040
BKN060
BKN040
BKN060
BKN040
BKN060
BKN040
BKN060
BKN040
BKN060
BKN040
BKN060
Ceiling
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
1,300 ft
AGL
1,300 ft
AGL
1,300 ft
AGL
1,200 ft
AGL
1,200 ft
AGL
1,200 ft
AGL
1,200 ft
AGL
1,200 ft
AGL
2,000 ft
AGL
2,000 ft
AGL
3,000 ft
AGL
3,000 ft
AGL
3,000 ft
AGL
4,000 ft
AGL
4,000 ft
AGL
4,000 ft
AGL
4,000 ft
AGL
4,000 ft
AGL
4,000 ft
AGL
Flight Rules VFR VFR VFR VFR VFR VFR VFR VFR MVFR MVFR MVFR MVFR MVFR MVFR MVFR MVFR MVFR MVFR VFR VFR VFR VFR VFR VFR VFR VFR VFR
Day/Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌅 04:45Z
🌙
Night
🌅 04:45Z
🌙
Night
🌅 04:45Z
☀️
Day
🌅 04:45Z
☀️
Day
🌅 04:45Z
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
🌇 19:14Z
☀️
Day
🌇 19:14Z
☀️
Day
🌇 19:14Z
🌙
Night
🌇 19:14Z
🌙
Night
🌇 19:14Z
🌙
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 occurrenceAGL: Above Ground Level

Forecast Periods

BASE
VFR
Wind
240° at 5 kt
Visibility
10+ km
Clouds
CLR
📖 Plain English Explanation:

This is the base forecast condition. Winds from the West-Southwest (240°) at 5 kt. Visibility will be excellent at 10+ km. Skies will be clear. Conditions will be suitable for Visual Flight Rules (VFR) operations.

BECMG 01:00Z - 02:00Z
VFR
Wind
260° at 10 kt
Gusts: 15 kt
Visibility
10+ km
Clouds
CLR
📖 Plain English Explanation:

Conditions will gradually change to become: Winds from the West (260°) at 10 kt. Gusts up to 15 kt are expected. Visibility will be excellent at 10+ km. Skies will be clear. Conditions will be suitable for Visual Flight Rules (VFR) operations.

BECMG 07:00Z - 08:00Z
MVFR
Wind
200° at 9 kt
Visibility
10+ km
Clouds
BKN013
📖 Plain English Explanation:

Conditions will gradually change to become: Winds from the South-Southwest (200°) at 9 kt. Visibility will be excellent at 10+ km. Broken clouds at 1300 feet. Marginal VFR conditions - some restrictions for visual flying.

BECMG 10:00Z - 11:00Z
MVFR
Wind
190° at 9 kt
Visibility
10+ km
Clouds
OVC012
📖 Plain English Explanation:

Conditions will gradually change to become: Winds from the South (190°) at 9 kt. Visibility will be excellent at 10+ km. Overcast skies at 1200 feet. Marginal VFR conditions - some restrictions for visual flying.

BECMG 15:00Z - 16:00Z
MVFR
Wind
200° at 10 kt
Gusts: 15 kt
Visibility
10+ km
Clouds
BKN020
📖 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 excellent at 10+ km. Broken clouds at 2000 feet. Marginal VFR conditions - some restrictions for visual flying.

BECMG 17:00Z - 18:00Z
VFR
Wind
210° at 12 kt
Gusts: 18 kt
Visibility
10+ km
Clouds
BKN030 BKN080
📖 Plain English Explanation:

Conditions will gradually change to become: Winds from the South-Southwest (210°) at 12 kt. Gusts up to 18 kt are expected. Visibility will be excellent at 10+ km. Broken clouds at 3000 feet, Broken clouds at 8000 feet. Conditions will be suitable for Visual Flight Rules (VFR) operations.

BECMG 20:00Z - 21:00Z
VFR
Wind
220° at 12 kt
Gusts: 19 kt
Visibility
10+ km
Clouds
BKN040 BKN060 OVC080
📖 Plain English Explanation:

Conditions will gradually change to become: Winds from the Southwest (220°) at 12 kt. Gusts up to 19 kt are expected. Visibility will be excellent at 10+ km. Broken clouds at 4000 feet, Broken clouds at 6000 feet, Overcast skies at 8000 feet. Conditions will be suitable for Visual Flight Rules (VFR) operations.

BECMG 02:00Z - 03:00Z
VFR
Wind
220° at 10 kt
Gusts: 15 kt
Visibility
10+ km
Clouds
SCT040 BKN060 OVC080
📖 Plain English Explanation:

Conditions will gradually change to become: Winds from the Southwest (220°) at 10 kt. Gusts up to 15 kt are expected. Visibility will be excellent at 10+ km. Scattered clouds at 4000 feet, Broken clouds at 6000 feet, Overcast skies at 8000 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.