// Station · 21d ago · STALE · HARD STALE

OIIS

Semnan Municipal Airport

CAT VFR

WIND 020° / 4 kt

VIS 6+ SM

CEILING CLR

T/Td 36°C / 1°C

ALTIM 30.00 inHg

ELEV 3,665 FT

35.5911°N / 53.4951°E

LOCATION · Semnan, IR

WIND

020°4 kt

OIIS · 3,665 FT

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

METRIC

NOW · 11Z

+6H

+12H

+18H

WIND

020°/4

VIS

6+ SM

CEILING

CLR

LAYERS

—

T / Td

36 / 1

ALTIM

30.00"

// Interpretation

VFR with light winds at 020°/4 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 OIIS 041100Z 02004KT CAVOK 36/01 Q1016 A3000

OIIS · day 4 at 11:00 UTC · wind from 020° at 4 kt · visibility 6+ SM · temp 36°C / dewpoint 1°C · altimeter 30.00" Hg

// Runway analysis · computed from current METAR wind

Wind 020° @ 4 kt

ALL USABLE · WINDS CALM

WIND

020°4 kt

HEADWIND CAUTION · HIGH XW AVOID · TAILWIND

ALL RUNWAYS · CALM WINDS 2 ends

04 HDG 040° —CALM —— 11,739'

22 HDG 220° —CALM —— 11,739'

Pattern altitude: 4,665 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 +28°C

7,000FT

+3,335 FT ABOVE FIELD ELEV

// DA · LAST 24 HOURS loading…

FIELD ELEV3,665 FT OAT+36°C ISA DELTA+28°C PRESSURE ALT3,583 FT

// Performance equivalent Operating here right now feels like operating at OIFS (Shahrekord Airport, Shahrekord, elev 6,723 ft) on a standard ISA day.

// Aircraft performance impact DANGEROUS

TAKEOFF ROLL CLIMB RATE

Single-engine propC172, PA-28, Cherokee

+70%

-49%

Turbo / high-perf pistonSR22T, Bonanza, Mooney

+49%

-32%

Light jetCJ4, Phenom 300, M2

+28%

-21%

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 LEVEL21,847 ft VFR MARGINunlimited

// Sun & Moon · times in Z · bar = local day (UTC+4)

01:53ZSUNRISE

08:29ZSOLAR NOON

15:05ZSUNSET

15:31ZCIVIL END

CURRENT18:15Z DAYLIGHT REMAINING0m VFR NIGHT BEGINS15:31Z (past) DAY LENGTH13h 11m

Waxing Gibbous

ILLUMINATION94% MOONRISE12:00Z MOONSET01:12Z FULL MOON IN2 days

// Nearest reporting stations

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

AIRSPACE

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