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

// Station · 1h 1m ago · STALE

LKNA

Náměšť Air Base
CAT VFR
WIND 310° / 18 kt
VIS 6+ SM
CEILING CLR
T/Td 27°C / 10°C
ALTIM 30.09 inHg
ELEV 1,548 FT
49.1663°N / 16.1240°E
LOCATION · Sedlec, CZ
N
WIND
310°18 kt
LKNA · 1,548 FT
© OSM · CartoDB

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

METRIC
NOW · 12Z
+6H
+12H
+18H
WIND
310°/18
 
 
 
VIS
6+ SM
 
 
 
CEILING
CLR
 
 
 
LAYERS
 
 
 
T / Td
27 / 10
 
 
 
ALTIM
30.09"
 
 
 

// Interpretation

VFR with brisk winds at 310°/18 kt. Visibility 6+ SM 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 LKNA 271200Z 31018KT CAVOK 27/10 Q1019 NOSIG

LKNA · day 27 at 12:00 UTC · wind from 310° at 18 kt · visibility 6+ SM · temp 27°C / dewpoint 10°C · altimeter 30.09" Hg

// Runway analysis · computed from current METAR wind

Wind 310° @ 18 kt
1 USABLE · 1 AVOID
N
WIND
310°18 kt
HEADWIND CAUTION · HIGH XW AVOID · TAILWIND
HEADWIND ENDS 1 usable
30 HDG 300° H18 kt X3 kt RIGHT PRIMARY · 7,874'
TAILWIND ENDS · AVOID 1 ends
12 HDG 120° T18 kt X3 kt LEFT
Pattern altitude: 2,548 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

3,100FT
+1,552 FT ABOVE FIELD ELEV
// DA · LAST 24 HOURS ↗ +200 FT
3,600 2,400 1,200
24h AGO18h12h6hNOW
FIELD ELEV1,548 FT OAT+27°C ISA DELTA+15°C PRESSURE ALT1,377 FT
// Performance equivalent Your aircraft will perform as if it's at a field 3,100 ft high on a standard ISA day — that's +1,552 ft above LKNA's actual elevation.
// Aircraft performance impact SIGNIFICANT
TAKEOFF ROLL CLIMB RATE
Single-engine propC172, PA-28, Cherokee
+31%
-22%
Turbo / high-perf pistonSR22T, Bonanza, Mooney
+22%
-14%
Light jetCJ4, Phenom 300, M2
+12%
-9%

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 · 15,184 FT LKNA ELEV · 1,548 FT
// Reported layers (highest → lowest)
CLR
No reported cloud layers — clear sky from surface to reporting ceiling.
// Computed
CEILING HIGHEST LAYER TOTAL COVERAGEclear FREEZING LEVEL15,184 ft VFR MARGINunlimited

// Sun & Moon · times in Z · bar = local day (UTC+1)

03:00ZSUNRISE
10:54ZSOLAR NOON
18:47ZSUNSET
19:27ZCIVIL END
CURRENT13:01Z DAYLIGHT REMAINING5h 46m VFR NIGHT BEGINS19:27Z (6h 26m) DAY LENGTH15h 46m
Waxing Gibbous
ILLUMINATION83% MOONRISE11:48Z MOONSET03:34Z FULL MOON IN4 days

// Nearest reporting stations · 3 shown · 60 NM radius

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

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