// Station · 26m ago

KIAD

Washington Dulles International Airport

CAT VFR

WIND VRB / 4 kt

VIS 10+ SM

CEILING BKN at 25,000 ft

T/Td 27.2°C / 21.1°C

ALTIM 29.96 inHg

ELEV 312 FT

38.9445°N / 77.4558°W

LOCATION · Dulles, US

WIND

VRB4 kt

KIAD · 312 FT

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

METRIC

NOW · 13Z

+6H

+12H

+18H

WIND

VRB/4

VIS

10+ SM

CEILING

BKN250

LAYERS

FEW120 SCT190 BKN250

T / Td

27 / 21

ALTIM

29.96"

// Interpretation

VFR — ceiling 25,000 ft. Light winds at variable/4 kt, visibility better than 10 statute miles, a few at 12,000 ft, scattered at 19,000 ft, and broken at 25,000 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 111352Z VRB04KT 10SM FEW120 SCT190 BKN250 27/21 A2996 RMK AO2 SLP142 T02720211 $

KIAD · day 11 at 13:52 UTC · wind variable at 4 kt · visibility 10+ SM · a few clouds at 12,000 ft · scattered layer at 19,000 ft · broken layer at 25,000 ft · temp 27°C / dewpoint 21°C · altimeter 29.96" Hg · automated station w/ precipitation discriminator · sea-level pressure 1014.2 mb

// Runway analysis · computed from current METAR wind

Wind VRB @ 4 kt

ALL USABLE · WINDS CALM

WIND

VRB4 kt

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 +13°C

1,800FT

+1,488 FT ABOVE FIELD ELEV

// DA · LAST 24 HOURS ↘ -200 FT

24h AGO18h12h6hNOW

FIELD ELEV312 FT OAT+27°C ISA DELTA+13°C PRESSURE ALT271 FT

// Performance equivalent Operating here right now feels like operating at KVJI (Virginia Highlands Airport, Abingdon, elev 2,087 ft) on a standard ISA day.

// Aircraft performance impact MINOR

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.

// Cloud layers · 3 reported · highest to lowest

// Reported layers (highest → lowest)

BKN250

Broken · base 25,000 ft AGL · ~5–7 oktas

SCT190

Scattered · base 19,000 ft AGL · ~3–4 oktas

FEW120

Few · base 12,000 ft AGL · ~1–2 oktas

// Computed

CEILING25,000 ft AGL HIGHEST LAYER25,000 ft TOTAL COVERAGE~91% (overcast) FREEZING LEVEL14,049 ft VFR MARGIN+22,000 ft

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

09:54ZSUNRISE

17:16ZSOLAR NOON

00:37ZSUNSET

01:09ZCIVIL END

CURRENT14:18Z DAYLIGHT REMAINING10h 19m VFR NIGHT BEGINS01:09Z (10h 51m) DAY LENGTH14h 43m

Waning Crescent

ILLUMINATION11% MOONRISE07:18Z MOONSET22:02Z FULL MOON IN18 days

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

KJYO

VFR

Leesburg Executive Airport · Leesburg

WIND: 350° / 6 kt
VIS: 10+ SM
CEILING: CLR
DIST: 9 NM NW
AGE: 3m ago

KHEF

VFR

Manassas Regional Airport/Harry P. Davis Field · Manassas

WIND: 350° / 7 kt
VIS: 10+ SM
CEILING: CLR
DIST: 14 NM S
AGE: 22m ago

KDAA

VFR

Davison Army Air Field · Fort Belvoir

WIND: 300° / 3 kt
VIS: 10+ SM
CEILING: CLR
DIST: 19 NM SE
AGE: 23m ago

KGAI

VFR

Montgomery County Airpark · Gaithersburg

WIND: CALM
VIS: 10+ SM
CEILING: CLR
DIST: 19 NM NE
AGE: 22m ago

KDCA

VFR

Ronald Reagan Washington National Airport · Washington

WIND: 340° / 6 kt
VIS: 10+ SM
CEILING: BKN250
DIST: 20 NM E
AGE: 26m ago

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

AIRSPACE

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