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// Station · 32m ago

KHYI

San Marcos Regional Airport
CAT MVFR
WIND 140° / 4 kt
VIS 10+ SM
CEILING BKN at 1,100 ft
T/Td 26.7°C / 23.9°C
ALTIM 30.08 inHg
ELEV 597 FT
29.8927°N / 97.8630°W
LOCATION · San Marcos, US
N
WIND
140°4 kt
KHYI · 597 FT
© OSM · CartoDB

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

METRIC
NOW · 13Z
+6H
+12H
+18H
WIND
140°/4
 
 
 
VIS
10+ SM
 
 
 
CEILING
BKN011
 
 
 
LAYERS
BKN011 OVC015
 
 
 
T / Td
27 / 24
 
 
 
ALTIM
30.08"
 
 
 

// Interpretation

MVFR — ceiling 1,100 ft. Light winds at 140°/4 kt, visibility better than 10 statute miles, broken at 1,100 ft, and overcast at 1,500 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

METAR KHYI 111356Z 14004KT 10SM BKN011 OVC015 27/24 A3008 RMK AO2 SLP179 T02670239

KHYI · day 11 at 13:56 UTC · wind from 140° at 4 kt · visibility 10+ SM · broken layer at 1,100 ft · overcast at 1,500 ft · temp 27°C / dewpoint 24°C · altimeter 30.08" Hg · automated station w/ precipitation discriminator · sea-level pressure 1017.9 mb

// Runway analysis · computed from current METAR wind

Wind 140° @ 4 kt
ALL USABLE · WINDS CALM
N
WIND
140°4 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 +13°C

1,900FT
+1,303 FT ABOVE FIELD ELEV
// DA · LAST 24 HOURS ↘ -200 FT
3,300 2,300 1,300
24h AGO18h12h6hNOW
FIELD ELEV597 FT OAT+27°C ISA DELTA+13°C PRESSURE ALT435 FT
// Performance equivalent Operating here right now feels like operating at KSJT (San Angelo Regional Mathis Field, San Angelo, elev 1,919 ft) on a standard ISA day.
// Aircraft performance impact MINOR
TAKEOFF ROLL CLIMB RATE
Single-engine propC172, PA-28, Cherokee
+19%
-13%
Turbo / high-perf pistonSR22T, Bonanza, Mooney
+13%
-9%
Light jetCJ4, Phenom 300, M2
+8%
-6%

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 · 2 reported · highest to lowest

FT 0 5k 10k 15k 20k 25k FRZ LVL · 14,082 FT BKN011 · CEILING OVC015 KHYI ELEV · 597 FT
// Reported layers (highest → lowest)
OVC015
Overcast · base 1,500 ft AGL · 8 oktas
BKN011
Broken · base 1,100 ft AGL · ~5–7 oktas
// Computed
CEILING1,100 ft AGL HIGHEST LAYER1,500 ft TOTAL COVERAGE~100% (overcast) FREEZING LEVEL14,082 ft VFR MARGIN-1,900 ft

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

11:39ZSUNRISE
18:38ZSOLAR NOON
01:36ZSUNSET
02:03ZCIVIL END
CURRENT14:28Z DAYLIGHT REMAINING11h 08m VFR NIGHT BEGINS02:03Z (11h 35m) DAY LENGTH13h 56m
Waning Crescent
ILLUMINATION11% MOONRISE09:04Z MOONSET23:00Z FULL MOON IN18 days

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

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

© OpenStreetMap · CartoDB · OpenAIP
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