Gray Army Air Field

KGRF / GRF

Fort Lewis/Tacoma, US

Last Updated
May 15, 06:55Z

Military Airport

Restricted

This is a U.S. military installation. Civil aircraft operations are generally prohibited without prior authorization.

Access Notes:

Most military airfields closed to civil traffic; some joint-use exceptions exist

Consult official AIP (FAA AIP GEN 3.3) for current access procedures and restrictions.

Current Weather

Display Units
Fresh 28 min ago
06:55Z

☀️ Day
VFR
Flight Rules
9°C
Temperature
Dewpoint: 8°C
8 kt
140°
10 SM
Visibility
Ceiling
Unlimited
1020 hPa
QNH
Altimeter Setting

Raw METAR

METAR KGRF 150655Z AUTO 14008KT 10SM CLR 09/08 A3012 RMK AO2 SLP204 T00890075 $

Weather Briefing

VFR

Gray Army Air Field is currently reporting visual flight rules (VFR) conditions with clear skies and 10 SM visibility.

Wind Analysis

Winds are from the southeast (140°) at 8 knots. Runway 15/33 is favored with a 8-knot headwind and 1-knot crosswind component.

Visibility & Ceiling

Visibility is 10 SM. Skies are clear with unlimited ceiling.

Temperature & Moisture

Temperature is 9°C (48°F) with a dewpoint of 8°C. The temperature-dewpoint spread is very narrow, indicating saturated or near-saturated air. Fog formation or low cloud development is likely.

Forecast Outlook

The TAF forecast covers the next 30 hours. The forecast shows a transition between VFR and IFR conditions. Pilots should monitor the forecast closely and have an alternate airport plan. Expected weather includes: Rain, Light Rain, Light Drizzle. Temporary MVFR conditions are forecast with Rain between 05:00Z and 07:00Z.

Pilot Recommendations

Conditions are favorable for visual flight. The narrow temperature-dewpoint spread creates risk of fog formation, particularly during evening and early morning hours. The forecast indicates conditions may deteriorate. Ensure you have fuel reserves and a viable alternate airport.

This briefing is generated from real-time METAR and TAF data. Always verify with official sources before flight.

QNH
1020 hPa
Sea Level Pressure
For altitude above MSL
QFE
1010 hPa
Field Pressure
Height above aerodrome (300 ft)
Pressure Alt
98 ft
QNE Reference
Standard: 1013 hPa
Density Altitude: -550 ft
ISA Deviation: -5.4°C

Forecast (TAF)

View Full TAF
Raw TAF
TAF KGRF 150500Z 1505/1611 13010KT 9999 SCT025 BKN045 OVC070 620504 QNH3008INS TEMPO 1505/1507 6000 RA FEW005 SCT008 BKN015 OVC025 620503 BECMG 1516/1518 10010G15KT 9000 -RA BKN013 OVC040 620359 510052 QNH3010INS BECMG 1523/1524 10010G15KT 9000 -DZ SCT015 BKN025 600505 510052 QNH3009INS TX11/1601Z TN06/1513Z
Upcoming Changes (Next 12 Hours)
07:22Z BASE
+0h
VFR 130° 10 kt
Visibility: 10+ km
Ceiling: 4,500 ft
16:00Z BECMG
+9h
IFR 100° 10 kt
Visibility: 9 km
Ceiling: 1,300 ft
Light Rain

24-Hour Weather Evolution

Loading weather data...
Data Sources
  • • Current conditions from METAR observations
  • • Historical data from past 24 hours
  • • No forecast or predicted data included
  • • Data updated with each new METAR report
Chart Features
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  • • Click legend items to toggle data series
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Note: Future values beyond current TAF validity are estimates based on climatological data and trends. Always verify with current forecasts before flight operations.

Airport Runway Layout

N
GRF
15 ✈️
33

Runway Information

Runway Length Width Surface Heading Wind Component
✈️ 15/33
Active: 15
6,125 ft 150 ft ASP 167°
7.9 kt 1.4 kt
10° angle
🟢 Active Runway: Best headwind component for current conditions
⬆️ Headwind: Favorable wind component
↔️ Crosswind: ≤10kt Safe, 11-15kt Caution, >15kt Challenging

Weather Statistics - KGRF

9,130 observations | Sep 2025 - May 2026

Flight Rules Distribution

VFR
63.9%
MVFR
22.2%
IFR
10.5%
LIFR
3.4%

Gray Army Air Field typically experiences VFR conditions 63.9% of the time, though instrument-rated pilots will find IFR weather present approximately 13.9% of observations. Prevailing winds are from the SE averaging 6.9 knots. Calm conditions occur 27.2% of the time. Temperature extremes range from -6°C to 32°C, reflecting significant seasonal variation. The best months for VFR flying are September, October, February.

Wind Analysis

Prevailing Direction: SE (135°)
Average Speed: 6.9 kt
Maximum Recorded: 27 kt
Calm Winds: 27.2%
Direction Distribution:
N
4.1%
NE
1.4%
E
13.6%
SE
30%
S
12.1%
SW
3.9%
W
3.4%
NW
4.3%

Temperature Range

Average: 8.8°C
Range: -6°C to 32°C
-6°C 32°C

Visibility

Average: 9.3 SM
Below 3 SM: 1.7%
Fog Frequency: 4.1%

Best Months for VFR

September October February

Runway Wind Analysis

Runway 15/33
Favorable wind: 100%
Avg crosswind: 2.8 kt

Statistics computed from 9,130 METAR observations (Sep 2025 - May 2026). Data sourced from official aviation weather services. Updated daily.

Gray Army Air Field - Airport Information

Airport Details

ICAO Code: KGRF
IATA Code: GRF
Type: medium airport
Status: active
Elevation: 300 ft MSL

Location

City: Fort Lewis/Tacoma
Country: US
Latitude: 47.079201°
Longitude: -122.581001°
Time Zone: Etc/GMT+8

Runway Information

Runway 15/33
Length: 6,125 ft
Width: 150 ft
Surface: ASP
ILS: No

About Gray Army Air Field

Gray Army Air Field is a military facility. Civilian access may be restricted or require Prior Permission (PPR). Pilots should consult the US AIP for current access procedures and restrictions.

Overview

Gray Army Air Field serves Joint Base Lewis-McChord near Tacoma, Washington, supporting military aviation operations. Located at 300 feet mean sea level, the airport provides critical infrastructure for tactical and transport aircraft in the Pacific Northwest region.

Flying Conditions

Pilots can expect predominantly VFR conditions 62.3% of the time, with marginal VFR occurring in 20.9% of observations. Seasonal temperature variations range from -4°C to 32°C, creating diverse flying environments throughout the year. Southeast winds at an average of 7 knots characterize the local wind pattern, with calm conditions observed 29.8% of the time.

Notable Features

The single runway 15/33 is 6,125 feet long with an asphalt surface, providing adequate length for medium-sized military aircraft. The airport's location near Tacoma offers strategic positioning with consistent wind conditions that strongly favor runway alignment, with wind parameters supporting runway operations 100% of the time.

Approach Considerations

Approach planning should consider the prevailing southeast winds, with an average crosswind of only 2.7 knots. Visibility typically remains good, averaging 9.2 statute miles, though pilots should be prepared for occasional reduced visibility periods, with fog present in 5.6% of observations and visibility below 3 miles in 2.2% of reports.

Data Sources & Accuracy: Airport information sourced from OurAirports.com, a collaborative database of worldwide airport data. Weather data from official aviation weather services including NOAA Aviation Weather Center and international METAR/TAF providers. Information is updated regularly but pilots should always verify current conditions and NOTAMs through official channels before flight operations.

Official Data Sources

Weather NOAA Aviation Weather Center • International METAR/TAF Network
Airports OurAirports.com • Public domain airport database
NOTAMs FAA NOTAM System • ICAO NOTAM Distribution
Last updated: Jan 1, 1970 12:00 AM UTC

Disclaimer: Data is provided for informational purposes only. Pilots must verify all information through official sources before flight operations. Weather conditions change rapidly; always obtain a current briefing from approved weather services.