Gray Army Air Field

KGRF / GRF

Fort Lewis/Tacoma, US

Current TAF Forecast

Raw TAF:
TAF KGRF 222100Z 2221/2403 20012G18KT 9999 BKN017 OVC022 QNH2998INS BECMG 2223/2224 22012G18KT 9999 BKN032 OVC040 QNH2999INS BECMG 2301/2302 22012G18KT 9999 BKN040 QNH3002INS BECMG 2306/2307 21012G20KT 9999 BKN027 OVC040 QNH3011INS TX14/2223Z TN08/2309Z

Detailed TAF Table

Parameter
Thu
02:00Z
+-1h
Thu
03:00Z
+0h
Thu
04:00Z
+1h
Thu
05:00Z
+2h
Thu
06:00Z
+3h
Thu
07:00Z
+4h
Thu
08:00Z
+5h
Thu
09:00Z
+6h
Thu
10:00Z
+7h
Thu
11:00Z
+8h
Thu
12:00Z
+9h
Thu
13:00Z
+10h
Thu
14:00Z
+11h
Thu
15:00Z
+12h
Thu
16:00Z
+13h
Thu
17:00Z
+14h
Thu
18:00Z
+15h
Thu
19:00Z
+16h
Thu
20:00Z
+17h
Thu
21:00Z
+18h
Thu
22:00Z
+19h
Thu
23:00Z
+20h
Fri
00:00Z
+21h
Fri
01:00Z
+22h
Wind Dir
200°
S
200°
S
200°
S
200°
S
210°
SW
210°
SW
210°
SW
210°
SW
210°
SW
210°
SW
210°
SW
210°
SW
210°
SW
210°
SW
210°
SW
210°
SW
210°
SW
210°
SW
210°
SW
210°
SW
210°
SW
210°
SW
210°
SW
210°
SW
Wind Speed
12 kt
G18 kt
12 kt
G18 kt
12 kt
G18 kt
12 kt
G18 kt
12 kt
G20 kt
12 kt
G20 kt
12 kt
G20 kt
12 kt
G20 kt
12 kt
G20 kt
12 kt
G20 kt
12 kt
G20 kt
12 kt
G20 kt
12 kt
G20 kt
12 kt
G20 kt
12 kt
G20 kt
12 kt
G20 kt
12 kt
G20 kt
12 kt
G20 kt
12 kt
G20 kt
12 kt
G20 kt
12 kt
G20 kt
12 kt
G20 kt
12 kt
G20 kt
12 kt
G20 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
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
Clouds
BKN017
OVC022
BKN017
OVC022
BKN017
OVC022
BKN017
OVC022
BKN027
OVC040
BKN027
OVC040
BKN027
OVC040
BKN027
OVC040
BKN027
OVC040
BKN027
OVC040
BKN027
OVC040
BKN027
OVC040
BKN027
OVC040
BKN027
OVC040
BKN027
OVC040
BKN027
OVC040
BKN027
OVC040
BKN027
OVC040
BKN027
OVC040
BKN027
OVC040
BKN027
OVC040
BKN027
OVC040
BKN027
OVC040
BKN027
OVC040
Ceiling
1,700 ft
AGL
1,700 ft
AGL
1,700 ft
AGL
1,700 ft
AGL
2,700 ft
AGL
2,700 ft
AGL
2,700 ft
AGL
2,700 ft
AGL
2,700 ft
AGL
2,700 ft
AGL
2,700 ft
AGL
2,700 ft
AGL
2,700 ft
AGL
2,700 ft
AGL
2,700 ft
AGL
2,700 ft
AGL
2,700 ft
AGL
2,700 ft
AGL
2,700 ft
AGL
2,700 ft
AGL
2,700 ft
AGL
2,700 ft
AGL
2,700 ft
AGL
2,700 ft
AGL
Flight Rules MVFR MVFR MVFR MVFR MVFR MVFR MVFR MVFR MVFR MVFR MVFR MVFR MVFR MVFR MVFR MVFR MVFR MVFR MVFR MVFR MVFR MVFR MVFR MVFR
Day/Night
🌙
Night
🌙
Night
🌅 05:15Z
🌙
Night
🌅 05:15Z
🌅
Dawn
🌅 05:15Z
☀️
Day
🌅 05:15Z
☀️
Day
🌅 05:15Z
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
🌇 18:44Z
☀️
Day
🌇 18:44Z
☀️
Day
🌇 18:44Z
🌇
Dusk
🌇 18:44Z
🌙
Night
🌇 18:44Z
🌙
Night
🌙
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
MVFR
Wind
200° at 12 kt
Gusts: 18 kt
Visibility
10+ km
Clouds
BKN017 OVC022
📖 Plain English Explanation:

This is the base forecast condition. Winds from the South-Southwest (200°) at 12 kt. Gusts up to 18 kt are expected. Visibility will be excellent at 10+ km. Broken clouds at 1700 feet, Overcast skies at 2200 feet. Marginal VFR conditions - some restrictions for visual flying.

BECMG 23:00Z - 00:00Z
VFR
Wind
220° at 12 kt
Gusts: 18 kt
Visibility
10+ km
Clouds
BKN032 OVC040
📖 Plain English Explanation:

Conditions will gradually change to become: Winds from the Southwest (220°) at 12 kt. Gusts up to 18 kt are expected. Visibility will be excellent at 10+ km. Broken clouds at 3200 feet, Overcast skies at 4000 feet. Conditions will be suitable for Visual Flight Rules (VFR) operations.

BECMG 01:00Z - 02:00Z
VFR
Wind
220° at 12 kt
Gusts: 18 kt
Visibility
10+ km
Clouds
BKN040
📖 Plain English Explanation:

Conditions will gradually change to become: Winds from the Southwest (220°) at 12 kt. Gusts up to 18 kt are expected. Visibility will be excellent at 10+ km. Broken clouds at 4000 feet. Conditions will be suitable for Visual Flight Rules (VFR) operations.

BECMG 06:00Z - 07:00Z
MVFR
Wind
210° at 12 kt
Gusts: 20 kt
Visibility
10+ km
Clouds
BKN027 OVC040
📖 Plain English Explanation:

Conditions will gradually change to become: Winds from the South-Southwest (210°) at 12 kt. Gusts up to 20 kt are expected. Visibility will be excellent at 10+ km. Broken clouds at 2700 feet, Overcast skies at 4000 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.