KTCM TAF

Terminal aerodrome forecast for McChord Field (Joint Base Lewis-McChord) (TCM · KTCM), Tacoma, WA. Issued 5 Nov 2026 0530Z, valid 0500Z to 1100Z, decoded period by period below. · Open on the map

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

TAF amended · issued 5 Nov 2026 0530Z

valid 0500Z to 1100Z

TAF AMD KTCM 050530Z 0505/0611 20008KT 9000 -RA BKN020 OVC040 620509 QNH3004INS TEMPO 0505/0507 BKN005 BECMG 0507/0508 20008KT 9999 NSW BKN020 OVC035 QNH3010INS BECMG 0510/0511 20008KT 9999 BKN020 QNH3015INS BECMG 0518/0519 20010KT 9999 FEW040 BKN130 QNH3019INS BECMG 0600/0601 20005KT 9999 BKN080 QNH3019INS BECMG 0605/0606 15005KT 9999 BKN140 QNH3014INS TX15/0523Z TN08/0514Z

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	200° at 8 kt	5.56 SM	2,000 ft BKN	Broken at 2,000 ft AGL, Overcast at 4,000 ft AGL	MVFR
`620509` Light icing in cloud (rime) from 5,000 ft to 14,000 ft AGL `QNH3004INS` Lowest altimeter setting 30.04 inHg
0500Z to 0700Z	TEMPO	No change	n/a	500 ft BKN	Broken at 500 ft AGL	IFR

0700Z to 1000Z	BECMG	200° at 8 kt	6+ SM	2,000 ft BKN	Broken at 2,000 ft AGL, Overcast at 3,500 ft AGL	MVFR
`NSW` No significant weather `QNH3010INS` Lowest altimeter setting 30.10 inHg
1000Z to 1800Z	BECMG	200° at 8 kt	6+ SM	2,000 ft BKN	Broken at 2,000 ft AGL	MVFR
`QNH3015INS` Lowest altimeter setting 30.15 inHg
1800Z to 0000Z	BECMG	200° at 10 kt	6+ SM	13,000 ft BKN	Few at 4,000 ft AGL, Broken at 13,000 ft AGL	VFR
`QNH3019INS` Lowest altimeter setting 30.19 inHg
0000Z to 0500Z	BECMG	200° at 5 kt	6+ SM	8,000 ft BKN	Broken at 8,000 ft AGL	VFR
`QNH3019INS` Lowest altimeter setting 30.19 inHg
0500Z to 1100Z	BECMG	150° at 5 kt	6+ SM	14,000 ft BKN	Broken at 14,000 ft AGL	VFR
`QNH3014INS` Lowest altimeter setting 30.14 inHg

Forecast notes

TX15/0523Z Maximum temperature 15°C at 2300Z on the 5th
TN08/0514Z Minimum temperature 8°C at 1400Z on the 5th

What the change groups mean

TEMPO: Temporary — expected for less than half the period, in spells under an hour.
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.
IFR: Instrument flight rules — ceiling 500 to 999 ft and/or visibility 1 to less than 3 SM.
VFR: Visual flight rules — ceiling above 3,000 ft and visibility greater than 5 SM.

Frequently asked

What is the current TAF for KTCM?

The forecast issued 5 Nov 2026 0530Z for McChord Field (Joint Base Lewis-McChord) reads: TAF AMD KTCM 050530Z 0505/0611 20008KT 9000 -RA BKN020 OVC040 620509 QNH3004INS TEMPO 0505/0507 BKN005 BECMG 0507/0508 20008KT 9999 NSW BKN020 OVC035 QNH3010INS BECMG 0510/0511 20008KT 9999 BKN020 QNH3015INS BECMG 0518/0519 20010KT 9999 FEW040 BKN130 QNH3019INS BECMG 0600/0601 20005KT 9999 BKN080 QNH3019INS BECMG 0605/0606 15005KT 9999 BKN140 QNH3014INS TX15/0523Z TN08/0514Z

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 KTCM

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.