// Station · 25m ago

KSIY

Siskiyou County Airport

CAT VFR

WIND VRB / 4 kt

VIS 10+ SM

CEILING Few/scattered only

T/Td 29.4°C / 4.4°C

ALTIM 29.93 inHg

ELEV 2,648 FT

41.7814°N / 122.4680°W

LOCATION · Montague, US

WIND

VRB4 kt

KSIY · 2,648 FT

// Current + 24h forecast · METAR loaded · TAF loading…

METRIC

NOW · 00Z

+6H

+12H

+18H

WIND

VRB/4

VIS

10+ SM

CEILING

—

LAYERS

FEW110

T / Td

29 / 4

ALTIM

29.93"

// Interpretation

VFR with light winds at variable/4 kt. Visibility better than 10 statute miles and a few at 11,000 ft. Would shift to MVFR if the ceiling drops to 3,000 ft or visibility below 5 SM.

Loading TAF forecast narrative…

SOURCES · NOAA Aviation Weather Center METAR (TAF loading…)

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// Raw observation METAR string + decoded

METAR KSIY 290053Z AUTO VRB04KT 10SM FEW110 29/04 A2993 RMK AO2 SLP124 T02940044

KSIY · day 29 at 00:53 UTC · wind variable at 4 kt · visibility 10+ SM · a few clouds at 11,000 ft · temp 29°C / dewpoint 4°C · altimeter 29.93" Hg · automated station w/ precipitation discriminator · sea-level pressure 1012.4 mb

// Runway analysis · computed from current METAR wind

Wind VRB @ 4 kt

ALL USABLE · WINDS CALM

WIND

VRB4 kt

HEADWIND CAUTION · HIGH XW AVOID · TAILWIND

ALL RUNWAYS · CALM WINDS 2 ends

17 HDG 170° —CALM —— 7,490'

35 HDG 350° —CALM —— 7,490'

Pattern altitude: 3,648 ft MSL (1,000 ft AGL). Verify pattern direction and altitude with the chart supplement before flying. // On calm winds (<3 kt), all runways are usable — favor the longest or whatever the pattern calls for.

// Density altitude · ISA +20°C

5,000FT

+2,352 FT ABOVE FIELD ELEV

// DA · LAST 24 HOURS loading…

FIELD ELEV2,648 FT OAT+29°C ISA DELTA+20°C PRESSURE ALT2,636 FT

// Performance equivalent Operating here right now feels like operating at KO02 (Nervino Airport, Beckwourth, elev 4,900 ft) on a standard ISA day.

// Aircraft performance impact SIGNIFICANT

TAKEOFF ROLL CLIMB RATE

Single-engine propC172, PA-28, Cherokee

+50%

-35%

Turbo / high-perf pistonSR22T, Bonanza, Mooney

+35%

-23%

Light jetCJ4, Phenom 300, M2

+20%

-15%

Approximate using ~10% perf loss / 1,000 ft DA for normally aspirated, scaled by powerplant type. Verify with your aircraft's POH for accurate numbers — especially above 5,000 ft DA where these rules of thumb diverge. Severity rating assumes a standard altimeter setting (29.92" Hg / 1013 hPa); a non-standard setting shifts the effective altitude by roughly 1,000 ft per 1" Hg of deviation.

// Cloud layers · 1 reported · highest to lowest

// Reported layers (highest → lowest)

FEW110

Few · base 11,000 ft AGL · ~1–2 oktas

// Computed

CEILING— HIGHEST LAYER11,000 ft TOTAL COVERAGE~15% (sparse) FREEZING LEVEL17,496 ft VFR MARGINunlimited

// Sun & Moon · times in Z · bar = local day (UTC-8)

13:33ZSUNRISE

20:12ZSOLAR NOON

02:52ZSUNSET

03:21ZCIVIL END

CURRENT01:18Z DAYLIGHT REMAINING1h 33m VFR NIGHT BEGINS03:21Z (2h 02m) DAY LENGTH13h 19m

Waning Gibbous

ILLUMINATION99% MOONRISE02:20Z MOONSET15:39Z FULL MOON IN29 days

// Nearest reporting stations

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// Area map · 60 NM radius · CartoDB Dark Matter + aeronautical overlay

AIRSPACE

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