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// KHLN · Helena Regional Airport · Helena

// Station · 33m ago

KHLN

Helena Regional Airport
CAT VFR
WIND CALM
VIS 10+ SM
CEILING CLR
T/Td 25°C / 6.1°C
ALTIM 30.22 inHg
ELEV 3,877 FT
46.6068°N / 111.9830°W
LOCATION · Helena, US
N
WIND
000°0 kt
KHLN · 3,877 FT
© OSM · CartoDB

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

METRIC
NOW · 19Z
+6H
+12H
+18H
WIND
CALM
 
 
 
VIS
10+ SM
 
 
 
CEILING
CLR
 
 
 
LAYERS
—
 
 
 
T / Td
25 / 6
 
 
 
ALTIM
30.22"
 
 
 

Loading TAF forecast…

// 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.

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

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// Raw observation METAR string + decoded

METAR KHLN 251953Z 00000KT 10SM CLR 25/06 A3022 RMK AO2 SLP217 T02500061

KHLN · day 25 at 19:53 UTC · winds calm · visibility 10+ SM · temp 25°C / dewpoint 6°C · altimeter 30.22" Hg · automated station w/ precipitation discriminator · sea-level pressure 1021.7 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 6 ends
09 HDG 090° —CALM —— 9,000'
27 HDG 270° —CALM —— 9,000'
05 HDG 050° —CALM —— 4,644'
23 HDG 230° —CALM —— 4,644'
16 HDG 160° —CALM —— 2,989'
34 HDG 340° —CALM —— 2,989'
Pattern altitude: 4,877 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 +17°C

5,600FT
+1,723 FT ABOVE FIELD ELEV
// DA · LAST 24 HOURS loading…
FIELD ELEV3,877 FT OAT+25°C ISA DELTA+17°C PRESSURE ALT3,573 FT
// Performance equivalent Operating here right now feels like operating at KBTM (Bert Mooney Airport, Butte, elev 5,550 ft) on a standard ISA day.
// Aircraft performance impact MODERATE
TAKEOFF ROLL CLIMB RATE
Single-engine propC172, PA-28, Cherokee
+56%
-39%
Turbo / high-perf pistonSR22T, Bonanza, Mooney
+39%
-25%
Light jetCJ4, Phenom 300, M2
+22%
-17%

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 · 16,503 FT KHLN ELEV · 3,877 FT
// Reported layers (highest → lowest)
CLR
No reported cloud layers — clear sky from surface to reporting ceiling.
// Computed
CEILING— HIGHEST LAYER— TOTAL COVERAGEclear FREEZING LEVEL16,503 ft VFR MARGINunlimited

// Sun & Moon · times in Z · bar = local day (UTC-7)

12:40ZSUNRISE
19:31ZSOLAR NOON
02:22ZSUNSET
02:54ZCIVIL END
CURRENT20:26Z DAYLIGHT REMAINING5h 56m VFR NIGHT BEGINS02:54Z (6h 28m) DAY LENGTH13h 42m
Waxing Gibbous
ILLUMINATION94% MOONRISE22:51Z MOONSET12:33Z FULL MOON IN2 days

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

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