// Station · 7m ago
KHLN
Helena Regional Airport
CAT VFR
WIND CALM
VIS 10+ SM
CEILING CLR
T/Td 11.1°C / 9.4°C
ALTIM 29.83 inHg
ELEV 3,877 FT
46.6068°N / 111.9830°W
LOCATION · Helena, US
WIND
000°0 kt
KHLN · 3,877 FT
© OSM · CartoDB
// Current + 24h forecast · METAR loaded · TAF loading…
METRIC
NOW · 12Z
+6H
+12H
+18H
WIND
CALM
VIS
10+ SM
CEILING
CLR
LAYERS
—
T / Td
11 / 9
ALTIM
29.83"
// 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…
// Want this glance-able on 10 airports? METAR Deck →// Raw observation METAR string + decoded
METAR KHLN 271253Z 00000KT 10SM CLR 11/09 A2983 RMK AO2 SLP096 T01110094
KHLN · day 27 at 12:53 UTC · winds calm · visibility 10+ SM · temp 11°C / dewpoint 9°C · altimeter 29.83" Hg · automated station w/ precipitation discriminator · sea-level pressure 1009.6 mb
// Runway analysis · computed from current METAR wind
Wind CALM
ALL USABLE · WINDS CALM
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 +4°C
4,400FT
+523 FT ABOVE FIELD ELEV
// DA · LAST 24 HOURS
↘ -600 FT
24h AGO18h12h6hNOW
FIELD ELEV3,877 FT
OAT+11°C
ISA DELTA+4°C
PRESSURE ALT3,966 FT
// Performance equivalent
Operating here right now feels like operating at KBZN
(Bozeman Yellowstone International Airport, Bozeman, elev 4,473 ft)
on a standard ISA day.
// Aircraft performance impact
SIGNIFICANT
TAKEOFF ROLL
CLIMB RATE
Single-engine propC172, PA-28, Cherokee
+44%
-31%
Turbo / high-perf pistonSR22T, Bonanza, Mooney
+31%
-20%
Light jetCJ4, Phenom 300, M2
+18%
-13%
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
// Sun & Moon · times in Z · bar = local day (UTC-7)
11:43ZSUNRISE
19:26ZSOLAR NOON
03:09ZSUNSET
03:47ZCIVIL END
CURRENT13:00Z
DAYLIGHT REMAINING14h 09m
VFR NIGHT BEGINS03:47Z (14h 46m)
DAY LENGTH15h 26m
Waxing Gibbous
ILLUMINATION83%
MOONRISE20:30Z
MOONSET11:56Z
FULL MOON IN4 days
// Nearest reporting stations · 5 shown · 100 NM (sparse area)
KBTM
LIFR
Bert Mooney Airport · Butte
- WIND
- CALM
- VIS
- 2.0 SM
- CEILING
- OVC002
- DIST
- 45 NM SW
- AGE
- 7m ago
KGTF
VFR
Great Falls International Airport · Great Falls
- WIND
- 250° / 7 kt
- VIS
- 10+ SM
- CEILING
- CLR
- DIST
- 58 NM NE
- AGE
- 7m ago
KBZN
VFR
Bozeman Yellowstone International Airport · Bozeman
- WIND
- 160° / 4 kt
- VIS
- 10+ SM
- CEILING
- FEW110
- DIST
- 60 NM SE
- AGE
- 4m ago
KLVM
VFR
Mission Field · Livingston
- WIND
- 290° / 11 kt
- VIS
- 10+ SM
- CEILING
- CLR
- DIST
- 84 NM SE
- AGE
- 7m ago
KMSO
VFR
Missoula Montana Airport · Missoula
- WIND
- CALM
- VIS
- 10+ SM
- CEILING
- OVC038
- DIST
- 89 NM W
- AGE
- 7m ago
// Area map · 100 NM radius · CartoDB Dark Matter + aeronautical overlay
© OpenStreetMap · CartoDB · OpenAIP
//
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