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// Station · 19m ago

KMIW

Marshalltown Municipal Airport
CAT VFR
WIND CALM
VIS 10+ SM
CEILING CLR
T/Td 31.7°C / 21.7°C
ALTIM 30.17 inHg
ELEV 974 FT
42.1127°N / 92.9178°W
LOCATION · Marshalltown, US
N
WIND
000°0 kt
KMIW · 974 FT
© OSM · CartoDB

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

METRIC
NOW · 21Z
+6H
+12H
+18H
WIND
CALM
 
 
 
VIS
10+ SM
 
 
 
CEILING
CLR
 
 
 
LAYERS
 
 
 
T / Td
32 / 22
 
 
 
ALTIM
30.17"
 
 
 

// Interpretation

VFR with winds calm. Visibility better than 10 statute miles 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 KMIW 142153Z AUTO 00000KT 10SM CLR 32/22 A3017 RMK AO2 SLP209 T03170217

KMIW · day 14 at 21:53 UTC · winds calm · visibility 10+ SM · temp 32°C / dewpoint 22°C · altimeter 30.17" Hg · automated station w/ precipitation discriminator · sea-level pressure 1020.9 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
13 HDG 130° CALM 5,007'
31 HDG 310° CALM 5,007'
18 HDG 180° CALM 2,759'
36 HDG 360° CALM 2,759'
Pattern altitude: 1,974 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 +18°C

2,900FT
+1,926 FT ABOVE FIELD ELEV
// DA · LAST 24 HOURS ↗ +200 FT
3,200 2,050 900
24h AGO18h12h6hNOW
FIELD ELEV974 FT OAT+32°C ISA DELTA+18°C PRESSURE ALT720 FT
// Performance equivalent Operating here right now feels like operating at KTIF (Thomas County Airport, Thedford, elev 2,925 ft) on a standard ISA day.
// Aircraft performance impact MINOR
TAKEOFF ROLL CLIMB RATE
Single-engine propC172, PA-28, Cherokee
+29%
-20%
Turbo / high-perf pistonSR22T, Bonanza, Mooney
+20%
-13%
Light jetCJ4, Phenom 300, M2
+12%
-9%

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 · 16,984 FT KMIW ELEV · 974 FT
// Reported layers (highest → lowest)
CLR
No reported cloud layers — clear sky from surface to reporting ceiling.
// Computed
CEILING HIGHEST LAYER TOTAL COVERAGEclear FREEZING LEVEL16,984 ft VFR MARGINunlimited

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

10:49ZSUNRISE
18:18ZSOLAR NOON
01:47ZSUNSET
02:21ZCIVIL END
CURRENT22:12Z DAYLIGHT REMAINING3h 35m VFR NIGHT BEGINS02:21Z (4h 09m) DAY LENGTH14h 58m
New Moon
ILLUMINATION0% MOONRISE10:55Z MOONSET01:54Z FULL MOON IN15 days

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

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

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