// Station · 14m ago

KHYI

San Marcos Regional Airport

CAT MVFR

WIND 120° / 5 kt

VIS 10+ SM

CEILING BKN at 1,700 ft

T/Td 29°C / 24°C

ALTIM 30.07 inHg

ELEV 597 FT

29.8927°N / 97.8630°W

LOCATION · San Marcos, US

WIND

120°5 kt

KHYI · 597 FT

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

METRIC

NOW · 15Z

+6H

+12H

+18H

WIND

120°/5

VIS

10+ SM

CEILING

BKN017

LAYERS

BKN017

T / Td

29 / 24

ALTIM

30.07"

// Interpretation

MVFR — ceiling 1,700 ft. Light winds at 120°/5 kt, visibility better than 10 statute miles, broken at 1,700 ft. Would drop to IFR below 1,000 ft ceiling or 3 SM visibility, or rise back to VFR above 3,000 ft and 5 SM.

Loading TAF forecast narrative…

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

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// Raw observation METAR string + decoded

SPECI KHYI 111503Z 12005KT 10SM BKN017 29/24 A3007 RMK AO2 LTG DSNT SW

KHYI · day 11 at 15:03 UTC · wind from 120° at 5 kt · visibility 10+ SM · broken layer at 1,700 ft · temp 29°C / dewpoint 24°C · altimeter 30.07" Hg · automated station w/ precipitation discriminator

// Runway analysis · computed from current METAR wind

Wind 120° @ 5 kt

3 USABLE · 3 AVOID

WIND

120°5 kt

HEADWIND CAUTION · HIGH XW AVOID · TAILWIND

HEADWIND ENDS 3 usable

13★ HDG 130° H5 kt X1 kt LEFT PRIMARY · 5,601'

08 HDG 080° H4 kt X3 kt RIGHT 6,330'

17 HDG 170° H3 kt X4 kt LEFT 5,214'

TAILWIND ENDS · AVOID 3 ends

35 HDG 350° T3 kt X4 kt RIGHT —

26 HDG 260° T4 kt X3 kt LEFT —

31 HDG 310° T5 kt X1 kt RIGHT —

Pattern altitude: 1,597 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 +15°C

2,200FT

+1,603 FT ABOVE FIELD ELEV

// DA · LAST 24 HOURS ↘ -300 FT

24h AGO18h12h6hNOW

FIELD ELEV597 FT OAT+29°C ISA DELTA+15°C PRESSURE ALT444 FT

// Performance equivalent Operating here right now feels like operating at KSOA (Sonora Municipal Airport, Sonora, elev 2,140 ft) on a standard ISA day.

// Aircraft performance impact MINOR

TAKEOFF ROLL CLIMB RATE

Single-engine propC172, PA-28, Cherokee

+22%

-15%

Turbo / high-perf pistonSR22T, Bonanza, Mooney

+15%

-10%

Light jetCJ4, Phenom 300, M2

+9%

-7%

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.

// Cloud layers · 1 reported · highest to lowest

// Reported layers (highest → lowest)

BKN017

Broken · base 1,700 ft AGL · ~5–7 oktas

// Computed

CEILING1,700 ft AGL HIGHEST LAYER1,700 ft TOTAL COVERAGE~75% (mostly covered) FREEZING LEVEL15,243 ft VFR MARGIN-1,300 ft

// Sun & Moon · times in Z · bar = local day (UTC-7)

11:39ZSUNRISE

18:38ZSOLAR NOON

01:36ZSUNSET

02:03ZCIVIL END

CURRENT15:17Z DAYLIGHT REMAINING10h 18m VFR NIGHT BEGINS02:03Z (10h 45m) DAY LENGTH13h 56m

Waning Crescent

ILLUMINATION11% MOONRISE09:05Z MOONSET23:02Z FULL MOON IN18 days

// Nearest reporting stations · 5 shown · 60 NM radius

K5C1

IFR

Boerne Stage Field · Boerne

WIND: 150° / 3 kt
VIS: 3.0 SM
CEILING: BKN009
DIST: 44 NM W
AGE: 22m ago

KDZB

MVFR

Horseshoe Bay Resort Airpark · Horseshoe Bay

WIND: 200° / 6 kt
VIS: 5.0 SM
CEILING: BKN024
DIST: 46 NM NW
AGE: 22m ago

KSSF

MVFR → VFR 16Z

Stinson Municipal Airport · San Antonio

WIND: 140° / 3 kt
VIS: 10+ SM
CEILING: BKN019
DIST: 46 NM SW
AGE: 2m ago

KT74

MVFR

Taylor Municipal Airport · Taylor

WIND: 170° / 10 kt
VIS: 10+ SM
CEILING: BKN018
DIST: 46 NM NE
AGE: 22m ago

K3T5

MVFR

Fayette Regional Air Center Airport · La Grange

WIND: 140° / 6 kt
VIS: 10+ SM
CEILING: BKN016
DIST: 48 NM E
AGE: 22m ago

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

AIRSPACE

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