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// VTCN · Nan Airport

// STALE Observation is 1h 6m old — METAR cadence is typically hourly. A fresh report may be on its way.

// Station · 1h 6m ago · STALE

VTCN

Nan Airport
CAT MVFR
WIND CALM
VIS 5.0 SM
CEILING CLR
T/Td 24°C / 24°C
ALTIM 30.00 inHg
ELEV 685 FT
18.8079°N / 100.7830°E
N
WIND
000°0 kt
VTCN · 685 FT
© OSM · CartoDB

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

METRIC
NOW · 00Z
+6H
+12H
+18H
WIND
CALM
 
 
 
VIS
5.0 SM
 
 
 
CEILING
CLR
 
 
 
LAYERS
—
 
 
 
T / Td
24 / 24
 
 
 
ALTIM
30.00"
 
 
 

Loading TAF forecast…

// Interpretation

MVFR — visibility 5.0 SM. Winds calm, visibility 5.0 SM, no reported cloud layers. 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 VTCN 130000Z 00000KT 8000 NSC 24/24 Q1016 NOSIG

VTCN · day 13 at 00:00 UTC · winds calm · visibility 5.0 SM · temp 24°C / dewpoint 24°C · altimeter 30.00" Hg

// Runway analysis · computed from current METAR wind

Wind CALM
ALL USABLE · WINDS CALM
N
WIND
000°calm
HEADWIND CAUTION · HIGH XW AVOID · TAILWIND
ALL RUNWAYS · CALM WINDS 2 ends
02 HDG 020° —CALM —— 6,562'
20 HDG 200° —CALM —— 6,562'
Pattern altitude: 1,685 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 +10°C

1,800FT
+1,115 FT ABOVE FIELD ELEV
// DA · LAST 24 HOURS loading…
FIELD ELEV685 FT OAT+24°C ISA DELTA+10°C PRESSURE ALT603 FT
// Performance equivalent Your aircraft will perform as if it's at a field 1,800 ft high on a standard ISA day — that's +1,115 ft above VTCN's actual elevation.
// Aircraft performance impact MODERATE
TAKEOFF ROLL CLIMB RATE
Single-engine propC172, PA-28, Cherokee
+18%
-13%
Turbo / high-perf pistonSR22T, Bonanza, Mooney
+13%
-8%
Light jetCJ4, Phenom 300, M2
+7%
-5%

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 · clear · no layers reported

FT 0 5k 10k 15k 20k 25k FRZ LVL · 12,806 FT VTCN ELEV · 685 FT
// Reported layers (highest → lowest)
CLR
No reported cloud layers — clear sky from surface to reporting ceiling.
// Computed
CEILING— HIGHEST LAYER— TOTAL COVERAGEclear FREEZING LEVEL12,806 ft VFR MARGINunlimited

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

23:11ZSUNRISE
05:04ZSOLAR NOON
10:57ZSUNSET
11:19ZCIVIL END
CURRENT01:06Z DAYLIGHT REMAINING9h 51m VFR NIGHT BEGINS11:19Z (10h 13m) DAY LENGTH11h 46m
Waxing Crescent
ILLUMINATION3% MOONRISE00:32Z MOONSET12:18Z FULL MOON IN13 days

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