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// Station · 16m ago

KMCW

Mason City Municipal Airport
CAT VFR
WIND CALM
VIS 9.0 SM
CEILING CLR
T/Td 21.1°C / 21.1°C
ALTIM 30.10 inHg
ELEV 1,213 FT
43.1598°N / 93.3297°W
LOCATION · Mason City, US
N
WIND
000°0 kt
KMCW · 1,213 FT
© OSM · CartoDB

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

METRIC
NOW · 12Z
+6H
+12H
+18H
WIND
CALM
 
 
 
VIS
9.0 SM
 
 
 
CEILING
CLR
 
 
 
LAYERS
 
 
 
T / Td
21 / 21
 
 
 
ALTIM
30.10"
 
 
 

// 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 KMCW 111253Z AUTO 00000KT 9SM CLR 21/21 A3010 RMK AO2 SLP179 T02110211

KMCW · day 11 at 12:53 UTC · winds calm · visibility 9.0 SM · temp 21°C / dewpoint 21°C · altimeter 30.10" Hg · automated station w/ precipitation discriminator · sea-level pressure 1017.9 mb

// 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 4 ends
18 HDG 180° CALM 6,501'
36 HDG 360° CALM 6,501'
12 HDG 120° CALM 5,502'
30 HDG 300° CALM 5,502'
Pattern altitude: 2,213 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 +8°C

2,000FT
+787 FT ABOVE FIELD ELEV
// DA · LAST 24 HOURS ↘ -400 FT
3,300 2,300 1,300
24h AGO18h12h6hNOW
FIELD ELEV1,213 FT OAT+21°C ISA DELTA+8°C PRESSURE ALT1,030 FT
// Performance equivalent Operating here right now feels like operating at KISB (Sibley Municipal Airport, Sibley, elev 1,538 ft) on a standard ISA day.
// Aircraft performance impact MINOR
TAKEOFF ROLL CLIMB RATE
Single-engine propC172, PA-28, Cherokee
+20%
-14%
Turbo / high-perf pistonSR22T, Bonanza, Mooney
+14%
-9%
Light jetCJ4, Phenom 300, M2
+8%
-6%

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 · clear · no layers reported

FT 0 5k 10k 15k 20k 25k FRZ LVL · 11,870 FT KMCW ELEV · 1,213 FT
// Reported layers (highest → lowest)
CLR
No reported cloud layers — clear sky from surface to reporting ceiling.
// Computed
CEILING HIGHEST LAYER TOTAL COVERAGEclear FREEZING LEVEL11,870 ft VFR MARGINunlimited

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

10:45ZSUNRISE
18:19ZSOLAR NOON
01:54ZSUNSET
02:29ZCIVIL END
CURRENT13:09Z DAYLIGHT REMAINING12h 45m VFR NIGHT BEGINS02:29Z (13h 19m) DAY LENGTH15h 09m
Waning Crescent
ILLUMINATION11% MOONRISE08:06Z MOONSET23:16Z FULL MOON IN18 days

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

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

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