KGRF TAF

Terminal aerodrome forecast for Gray AAF (Joint Base Lewis-McChord) (GRF · KGRF), Joint Base Lewis McChord, WA. Issued 5 Nov 2026 0510Z, valid 0500Z to 1100Z, decoded period by period below. · Open on the map

All of Gray AAF (Joint Base Lewis-McChord) — runways, frequencies, charts and live weather

TAF issued 5 Nov 2026 0510Z

valid 0500Z to 1100Z

Low level wind shear forecast 0700Z to 1800Z: wind 220° at 25 kt at 2,000 ft AGL.

TAF KGRF 050510Z 0505/0611 23006KT 6000 -RA BR BKN028 OVC030 620703 510207 QNH3002INS BECMG 0507/0508 21010KT 8000 BR BKN020 OVC025 WS020/22025KT 620601 510207 QNH3003INS BECMG 0517/0518 19006KT 9999 NSW SCT030 QNH3020INS BECMG 0521/0522 20008KT 9999 SCT040 QNH3019INS BECMG 0604/0605 18003KT 9999 FEW090 SCT100 QNH3017INS TX14/0519Z TN08/0604Z

Times are UTC (Zulu), as they appear in the bulletin.

Period by period

Period (UTC)	Change	Wind	Vis	Ceiling	Sky	Cat
0500Z to 0700Z	Initial	230° at 6 kt	3.75 SM	2,800 ft BKN	Broken at 2,800 ft AGL, Overcast at 3,000 ft AGL	MVFR
`620703` Light icing in cloud (rime) from 7,000 ft to 10,000 ft AGL `510207` Light turbulence from 2,000 ft to 9,000 ft AGL `QNH3002INS` Lowest altimeter setting 30.02 inHg
0700Z to 1700Z	BECMG	210° at 10 kt	5 SM	2,000 ft BKN	Broken at 2,000 ft AGL, Overcast at 2,500 ft AGL	MVFR
`WS020/22025KT` Low level wind shear from the surface to 2,000 ft AGL; wind at 2,000 ft 220° at 25 kt `620601` Light icing in cloud (rime) from 6,000 ft to 7,000 ft AGL `510207` Light turbulence from 2,000 ft to 9,000 ft AGL `QNH3003INS` Lowest altimeter setting 30.03 inHg
1700Z to 2100Z	BECMG	190° at 6 kt	6+ SM	Clear	Scattered at 3,000 ft AGL	VFR
`NSW` No significant weather `QNH3020INS` Lowest altimeter setting 30.20 inHg
2100Z to 0400Z	BECMG	200° at 8 kt	6+ SM	Clear	Scattered at 4,000 ft AGL	VFR
`QNH3019INS` Lowest altimeter setting 30.19 inHg
0400Z to 1100Z	BECMG	180° at 3 kt	6+ SM	Clear	Few at 9,000 ft AGL, Scattered at 10,000 ft AGL	VFR
`QNH3017INS` Lowest altimeter setting 30.17 inHg

Forecast notes

TX14/0519Z Maximum temperature 14°C at 1900Z on the 5th
TN08/0604Z Minimum temperature 8°C at 0400Z on the 6th

What the change groups mean

BECMG: Becoming — a gradual change over the stated window.

What the categories mean

MVFR: Marginal VFR — ceiling 1,000 to 3,000 ft and/or visibility 3 to 5 SM.
VFR: Visual flight rules — ceiling above 3,000 ft and visibility greater than 5 SM.

Frequently asked

What is the current TAF for KGRF?

The forecast issued 5 Nov 2026 0510Z for Gray AAF (Joint Base Lewis-McChord) reads: TAF KGRF 050510Z 0505/0611 23006KT 6000 -RA BR BKN028 OVC030 620703 510207 QNH3002INS BECMG 0507/0508 21010KT 8000 BR BKN020 OVC025 WS020/22025KT 620601 510207 QNH3003INS BECMG 0517/0518 19006KT 9999 NSW SCT030 QNH3020INS BECMG 0521/0522 20008KT 9999 SCT040 QNH3019INS BECMG 0604/0605 18003KT 9999 FEW090 SCT100 QNH3017INS TX14/0519Z TN08/0604Z

How far ahead does a TAF forecast?

A TAF covers a 24-hour period at most airports and 30 hours at larger ones, issued four times a day at 0000Z, 0600Z, 1200Z and 1800Z. It describes conditions within roughly 5 statute miles of the airport, not the surrounding area.

What do FM, BECMG and TEMPO mean?

FM (from) marks a rapid, permanent change at the stated time. BECMG (becoming) marks a gradual change over the stated window. TEMPO marks conditions expected for less than half the period, in spells of under an hour each. PROB30 and PROB40 give the probability of the conditions that follow.

More about KGRF

Forecasts from the US National Weather Service Aviation Weather Center. Times are UTC (Zulu). For planning and education only — always confirm with an official preflight briefing.

Something here wrong or out of date? Report a data problem.