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// KHAF · Half Moon Bay Airport · Half Moon Bay

// STALE Observation is 1h 34m old — METAR cadence is typically hourly. A fresh report may be on its way.

// Station · 1h 34m ago · STALE

KHAF

Half Moon Bay Airport
CAT MVFR
WIND CALM
VIS 5.0 SM
CEILING CLR
T/Td 10°C / 10°C
ALTIM 29.97 inHg
WX BR
ELEV 66 FT
37.5134°N / 122.5010°W
LOCATION · Half Moon Bay, US
N
WIND
000°0 kt
KHAF · 66 FT
© OSM · CartoDB

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

METRIC
NOW · 04Z
+6H
+12H
+18H
WIND
CALM
 
 
 
VIS
5.0 SM
 
 
 
CEILING
CLR
 
 
 
LAYERS
—
 
 
 
T / Td
10 / 10
 
 
 
ALTIM
29.97"
 
 
 

Loading TAF forecast…

// Interpretation

MVFR — visibility 5.0 SM. Winds calm, visibility 5.0 SM, no reported cloud layers. Reported weather: mist (BR). Mist is water droplets thinning visibility to between 5/8 and 6 SM — the moist, lighter cousin of fog. Would drop to IFR below 1,000 ft ceiling or 3 SM visibility, or rise back to VFR above 3,000 ft and 5 SM.

Loading TAF forecast narrative…

SOURCES · NOAA Aviation Weather Center METAR (TAF loading…)

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// Raw observation METAR string + decoded

METAR KHAF 130455Z AUTO 00000KT 5SM BR CLR 10/10 A2997 RMK AO2

KHAF · day 13 at 04:55 UTC · winds calm · visibility 5.0 SM · temp 10°C / dewpoint 10°C · altimeter 29.97" Hg · weather: mist (BR) · automated station w/ precipitation discriminator

// Runway analysis · computed from current METAR wind

Wind CALM
ALL USABLE · WINDS CALM
N
WIND
000°calm
HEADWIND CAUTION · HIGH XW AVOID · TAILWIND
ALL RUNWAYS · CALM WINDS 2 ends
12 HDG 120° —CALM —— 5,000'
30 HDG 300° —CALM —— 5,000'
Pattern altitude: 1,066 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 -5°C

-600FT
-666 FT BELOW FIELD ELEV
// DA · LAST 24 HOURS loading…
FIELD ELEV66 FT OAT+10°C ISA DELTA-5°C PRESSURE ALT13 FT
// Performance equivalent Operating here right now feels like operating at KCLR (Cliff Hatfield Memorial Airport, Calipatria, elev -182 ft) on a standard ISA day.
// Aircraft performance impact ENHANCED
TAKEOFF ROLL CLIMB RATE
Single-engine propC172, PA-28, Cherokee
+0%
-0%
Turbo / high-perf pistonSR22T, Bonanza, Mooney
+0%
-0%
Light jetCJ4, Phenom 300, M2
+0%
-0%

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

FT 0 5k 10k 15k 20k 25k FRZ LVL · 5,117 FT KHAF ELEV · 66 FT
// Reported layers (highest → lowest)
CLR
No reported cloud layers — clear sky from surface to reporting ceiling.
// Computed
CEILING— HIGHEST LAYER— TOTAL COVERAGEclear FREEZING LEVEL5,117 ft VFR MARGINunlimited

// Sun & Moon · times in Z · bar = local day (UTC-8)

14:16ZSUNRISE
19:57ZSOLAR NOON
01:38ZSUNSET
02:05ZCIVIL END
CURRENT06:29Z DAYLIGHT REMAINING0m VFR NIGHT BEGINS02:05Z (past) DAY LENGTH11h 22m
Waxing Crescent
ILLUMINATION4% MOONRISE15:48Z MOONSET03:10Z FULL MOON IN13 days

// Nearest reporting stations

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

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