// Station · 13m ago

KJWN

John C Tune Airport

CAT VFR

WIND CALM

VIS 9.0 SM

CEILING CLR

T/Td 15°C / 15°C

ALTIM 30.01 inHg

ELEV 495 FT

36.1824°N / 86.8867°W

LOCATION · Nashville, US

WIND

000°0 kt

KJWN · 495 FT

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

METRIC

NOW · 09Z

+6H

+12H

+18H

WIND

CALM

VIS

9.0 SM

CEILING

CLR

LAYERS

—

T / Td

15 / 15

ALTIM

30.01"

// Interpretation

VFR with winds calm. Visibility 9.0 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 KJWN 130955Z AUTO 00000KT 9SM CLR 15/15 A3001 RMK AO2

KJWN · day 13 at 09:55 UTC · winds calm · visibility 9.0 SM · temp 15°C / dewpoint 15°C · altimeter 30.01" Hg · automated station w/ precipitation discriminator

// Runway analysis · computed from current METAR wind

Wind CALM

ALL USABLE · WINDS CALM

WIND

000°calm

HEADWIND CAUTION · HIGH XW AVOID · TAILWIND

ALL RUNWAYS · CALM WINDS 2 ends

02 HDG 020° —CALM —— 6,001'

20 HDG 200° —CALM —— 6,001'

Pattern altitude: 1,495 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 +1°C

500FT

+5 FT ABOVE FIELD ELEV

// DA · LAST 24 HOURS loading…

FIELD ELEV495 FT OAT+15°C ISA DELTA+1°C PRESSURE ALT404 FT

// Performance equivalent Operating here right now feels like operating at KM08 (William L. Whitehurst Field, Bolivar, elev 499 ft) on a standard ISA day.

// Aircraft performance impact ENHANCED

TAKEOFF ROLL CLIMB RATE

Single-engine propC172, PA-28, Cherokee

+5%

-4%

Turbo / high-perf pistonSR22T, Bonanza, Mooney

+4%

-2%

Light jetCJ4, Phenom 300, M2

+2%

-2%

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

// Reported layers (highest → lowest)

CLR

No reported cloud layers — clear sky from surface to reporting ceiling.

// Computed

CEILING— HIGHEST LAYER— TOTAL COVERAGEclear FREEZING LEVEL8,071 ft VFR MARGINunlimited

// Sun & Moon · times in Z · bar = local day (UTC-6)

11:53ZSUNRISE

17:34ZSOLAR NOON

23:16ZSUNSET

23:41ZCIVIL END

CURRENT10:08Z DAYLIGHT REMAINING13h 07m VFR NIGHT BEGINS23:41Z (13h 33m) DAY LENGTH11h 22m

Waxing Crescent

ILLUMINATION5% MOONRISE13:33Z MOONSET00:55Z FULL MOON IN13 days

// Nearest reporting stations

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

AIRSPACE

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