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// Station · 55m ago

KHYI

San Marcos Regional Airport
CAT VFR
WIND 220° / 3 kt
VIS 10+ SM
CEILING CLR
T/Td 17.8°C / 17.2°C
ALTIM 29.84 inHg
ELEV 597 FT
29.8927°N / 97.8630°W
LOCATION · San Marcos, US
N
WIND
220°3 kt
KHYI · 597 FT
© OSM · CartoDB

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

METRIC
NOW · 08Z
+6H
+12H
+18H
WIND
220°/3
 
 
 
VIS
10+ SM
 
 
 
CEILING
CLR
 
 
 
LAYERS
 
 
 
T / Td
18 / 17
 
 
 
ALTIM
29.84"
 
 
 

// Interpretation

VFR with light winds at 220°/3 kt. Visibility better than 10 statute miles and no reported cloud layers. 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 KHYI 270856Z 22003KT 10SM CLR 18/17 A2984 RMK AO2 SLP097 60000 T01780172 53002

KHYI · day 27 at 08:56 UTC · wind from 220° at 3 kt · visibility 10+ SM · temp 18°C / dewpoint 17°C · altimeter 29.84" Hg · automated station w/ precipitation discriminator · sea-level pressure 1009.7 mb

// Runway analysis · computed from current METAR wind

Wind 220° @ 3 kt
ALL USABLE · WINDS CALM
N
WIND
220°3 kt
HEADWIND CAUTION · HIGH XW AVOID · TAILWIND
ALL RUNWAYS · CALM WINDS 6 ends
08 HDG 080° CALM 6,330'
26 HDG 260° CALM 6,330'
13 HDG 130° CALM 5,601'
31 HDG 310° CALM 5,601'
17 HDG 170° CALM 5,214'
35 HDG 350° CALM 5,214'
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 +4°C

1,200FT
+603 FT ABOVE FIELD ELEV
// DA · LAST 24 HOURS ↘ -100 FT
2,900 1,800 700
24h AGO18h12h6hNOW
FIELD ELEV597 FT OAT+18°C ISA DELTA+4°C PRESSURE ALT674 FT
// Performance equivalent Operating here right now feels like operating at KDLF (Laughlin Air Force Base, Del Rio, elev 1,082 ft) on a standard ISA day.
// Aircraft performance impact MINOR
TAKEOFF ROLL CLIMB RATE
Single-engine propC172, PA-28, Cherokee
+12%
-8%
Turbo / high-perf pistonSR22T, Bonanza, Mooney
+8%
-5%
Light jetCJ4, Phenom 300, M2
+5%
-4%

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 · clear · no layers reported

FT 0 5k 10k 15k 20k 25k FRZ LVL · 9,587 FT KHYI ELEV · 597 FT
// Reported layers (highest → lowest)
CLR
No reported cloud layers — clear sky from surface to reporting ceiling.
// Computed
CEILING HIGHEST LAYER TOTAL COVERAGEclear FREEZING LEVEL9,587 ft VFR MARGINunlimited

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

11:33ZSUNRISE
18:30ZSOLAR NOON
01:26ZSUNSET
01:52ZCIVIL END
CURRENT09:51Z DAYLIGHT REMAINING15h 34m VFR NIGHT BEGINS01:52Z (16h 01m) DAY LENGTH13h 52m
Waxing Gibbous
ILLUMINATION82% MOONRISE20:14Z MOONSET10:06Z FULL MOON IN4 days

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

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

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