Gray Army Air Field

KGRF / GRF

Fort Lewis/Tacoma, US

Last Updated
Apr 22, 21:25Z

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 27 min ago
21:25Z

🌙 Night
MVFR
Flight Rules
12°C
Temperature
Dewpoint: 9°C
9 kt
150° G18 kt
10 SM
Visibility
1,300 ft
Ceiling
Above Ground Level
1015 hPa
QNH
Altimeter Setting

Raw METAR

SPECI KGRF 222125Z AUTO 15009G18KT 10SM BKN013 OVC025 12/09 A2998 RMK AO2 BKN V OVC SLP156 $

Clouds - Visual Profile

12,000ft
9,000ft
6,000ft
3,000ft
Ground
Field Elev: 300 ft
BKN 1,300 ft AGL
OVC 2,500 ft AGL
☁️
BKN
Broken (5/8-7/8 sky coverage)
1,300 ft
AGL (Above Ground)
1,600 ft AMSL
☁️
OVC
Overcast (8/8 sky coverage)
2,500 ft
AGL (Above Ground)
2,800 ft AMSL

Weather Briefing

MVFR

Gray Army Air Field is currently reporting marginal VFR (MVFR) conditions with overcast skies at 2,500 feet and 10 SM visibility.

Wind Analysis

Winds are from the south-southeast (150°) at 9 knots with gusts to 18 knots. Runway 15/33 is favored with a 9-knot headwind and 0-knot crosswind component.

Visibility & Ceiling

Visibility is 10 SM. The ceiling is 1300 feet AGL (broken), placing conditions in the MVFR category.

Temperature & Moisture

Temperature is 12°C (54°F) with a dewpoint of 9°C. The narrow temperature-dewpoint spread suggests high humidity and potential for visibility restrictions, especially during cooling periods.

Forecast Outlook

The TAF forecast covers the next 30 hours. Conditions are expected to fluctuate between VFR and MVFR. VFR pilots should be prepared for deteriorating conditions.

Pilot Recommendations

VFR pilots should exercise caution. Consider filing IFR if instrument rated, or postponing the flight if conditions are expected to deteriorate further. The narrow temperature-dewpoint spread creates risk of fog formation, particularly during evening and early morning hours.

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

QNH
1015 hPa
Sea Level Pressure
For altitude above MSL
QFE
1005 hPa
Field Pressure
Height above aerodrome (300 ft)
Pressure Alt
248 ft
QNE Reference
Standard: 1013 hPa
Density Altitude: -40 ft
ISA Deviation: -2.4°C

Forecast (TAF)

View Full TAF
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
Upcoming Changes (Next 12 Hours)
21:52Z BASE
+0h
MVFR 200° 12 kt
Visibility: 10+ km
Ceiling: 1,700 ft
23:00Z BECMG
+2h
VFR 220° 12 kt
Visibility: 10+ km
Ceiling: 3,200 ft
01:00Z BECMG
+4h
VFR 220° 12 kt
Visibility: 10+ km
Ceiling: 4,000 ft
06:00Z BECMG
+9h
MVFR 210° 12 kt
Visibility: 10+ km
Ceiling: 2,700 ft

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
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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°
9.0 kt 0.0 kt
0° angle
🟢 Active Runway: Best headwind component for current conditions
⬆️ Headwind: Favorable wind component
↔️ Crosswind: ≤10kt Safe, 11-15kt Caution, >15kt Challenging

Weather Statistics - KGRF

8,458 observations | Sep 2025 - Apr 2026

Flight Rules Distribution

VFR
63.5%
MVFR
21.9%
IFR
11%
LIFR
3.6%

Gray Army Air Field typically experiences VFR conditions 63.5% of the time, though instrument-rated pilots will find IFR weather present approximately 14.6% of observations. Prevailing winds are from the SE averaging 6.9 knots. Calm conditions occur 27.8% 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: 27.8%
Direction Distribution:
N
4.1%
NE
1.5%
E
14.1%
SE
30.2%
S
11.6%
SW
3.5%
W
3.1%
NW
4%

Temperature Range

Average: 8.4°C
Range: -6°C to 32°C
-6°C 32°C

Visibility

Average: 9.2 SM
Below 3 SM: 1.8%
Fog Frequency: 4.5%

Best Months for VFR

September October February

Runway Wind Analysis

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

Statistics computed from 8,458 METAR observations (Sep 2025 - Apr 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.