// Station · 13m ago

KIAD

Washington Dulles International Airport

CAT VFR

WIND CALM

VIS 10+ SM

CEILING Few/scattered only

T/Td 17.2°C / 14.4°C

ALTIM 29.94 inHg

ELEV 312 FT

38.9445°N / 77.4558°W

LOCATION · Dulles, US

WIND

000°0 kt

KIAD · 312 FT

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

METRIC

NOW · 00Z

+6H

+12H

+18H

WIND

CALM

VIS

10+ SM

CEILING

—

LAYERS

FEW100 SCT200

T / Td

17 / 14

ALTIM

29.94"

// Interpretation

VFR with winds calm. Visibility better than 10 statute miles and a few at 10,000 ft, and scattered at 20,000 ft. 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 KIAD 130052Z 00000KT 10SM FEW100 SCT200 17/14 A2994 RMK AO2 SLP138 T01720144 $

KIAD · day 13 at 00:52 UTC · winds calm · visibility 10+ SM · a few clouds at 10,000 ft · scattered layer at 20,000 ft · temp 17°C / dewpoint 14°C · altimeter 29.94" Hg · automated station w/ precipitation discriminator · sea-level pressure 1013.8 mb

// 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 8 ends

01C HDG 010° —CALM —— 11,500'

19C HDG 190° —CALM —— 11,500'

01R HDG 010° —CALM —— 11,500'

19L HDG 190° —CALM —— 11,500'

12 HDG 120° —CALM —— 10,501'

30 HDG 300° —CALM —— 10,501'

01L HDG 010° —CALM —— 9,400'

19R HDG 190° —CALM —— 9,400'

Pattern altitude: 1,312 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 +3°C

600FT

+288 FT ABOVE FIELD ELEV

// DA · LAST 24 HOURS loading…

FIELD ELEV312 FT OAT+17°C ISA DELTA+3°C PRESSURE ALT289 FT

// Performance equivalent Operating here right now feels like operating at K0V4 (Brookneal/Campbell County Airport, Gladys, elev 596 ft) on a standard ISA day.

// Aircraft performance impact MINOR

TAKEOFF ROLL CLIMB RATE

Single-engine propC172, PA-28, Cherokee

+6%

-4%

Turbo / high-perf pistonSR22T, Bonanza, Mooney

+4%

-3%

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 · 2 reported · highest to lowest

// Reported layers (highest → lowest)

SCT200

Scattered · base 20,000 ft AGL · ~3–4 oktas

FEW100

Few · base 10,000 ft AGL · ~1–2 oktas

// Computed

CEILING— HIGHEST LAYER20,000 ft TOTAL COVERAGE~48% (mixed) FREEZING LEVEL8,999 ft VFR MARGINunlimited

// Sun & Moon · times in Z · bar = local day (UTC-5)

11:17ZSUNRISE

16:57ZSOLAR NOON

22:37ZSUNSET

23:04ZCIVIL END

CURRENT01:05Z DAYLIGHT REMAINING0m VFR NIGHT BEGINS23:04Z (past) DAY LENGTH11h 20m

Waxing Crescent

ILLUMINATION3% MOONRISE12:38Z MOONSET23:58Z FULL MOON IN13 days

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

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