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// Station · 25m ago

KGTF

Great Falls International Airport
CAT VFR
WIND 180° / 12 kt
VIS 10+ SM
CEILING CLR
T/Td 27.8°C / 10.6°C
ALTIM 29.89 inHg
ELEV 3,680 FT
47.4820°N / 111.3710°W
LOCATION · Great Falls, US
N
WIND
180°12 kt
KGTF · 3,680 FT
© OSM · CartoDB

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

METRIC
NOW · 15Z
+6H
+12H
+18H
WIND
180°/12
 
 
 
VIS
10+ SM
 
 
 
CEILING
CLR
 
 
 
LAYERS
 
 
 
T / Td
28 / 11
 
 
 
ALTIM
29.89"
 
 
 

// Interpretation

VFR with moderate winds at 180°/12 kt. 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 KGTF 111553Z 18012KT 10SM CLR 28/11 A2989 RMK AO2 SLP081 T02780106 $

KGTF · day 11 at 15:53 UTC · wind from 180° at 12 kt · visibility 10+ SM · temp 28°C / dewpoint 11°C · altimeter 29.89" Hg · automated station w/ precipitation discriminator · sea-level pressure 1008.1 mb

// Runway analysis · computed from current METAR wind

Wind 180° @ 12 kt
3 USABLE · 3 AVOID · 1 CAUTION
N
WIND
180°12 kt
HEADWIND CAUTION · HIGH XW AVOID · TAILWIND
HEADWIND ENDS 3 usable
17 HDG 170° H12 kt X2 kt RIGHT PRIMARY · 6,030'
21 HDG 210° H10 kt X6 kt LEFT 10,502'
25 HDG 250° H4 kt X11 kt LEFT ⚠ HIGH XW · 92%
TAILWIND ENDS · AVOID 3 ends
07 HDG 070° T4 kt X11 kt RIGHT
03 HDG 030° T10 kt X6 kt RIGHT
35 HDG 350° T12 kt X2 kt LEFT
Pattern altitude: 4,680 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 +20°C

6,100FT
+2,420 FT ABOVE FIELD ELEV
// DA · LAST 24 HOURS ↗ +100 FT
7,000 5,500 4,000
24h AGO18h12h6hNOW
FIELD ELEV3,680 FT OAT+28°C ISA DELTA+20°C PRESSURE ALT3,707 FT
// Performance equivalent Operating here right now feels like operating at KRED (Red Lodge Airport, Red Lodge, elev 5,763 ft) on a standard ISA day.
// Aircraft performance impact SIGNIFICANT
TAKEOFF ROLL CLIMB RATE
Single-engine propC172, PA-28, Cherokee
+61%
-43%
Turbo / high-perf pistonSR22T, Bonanza, Mooney
+43%
-27%
Light jetCJ4, Phenom 300, M2
+24%
-18%

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 · 17,720 FT KGTF ELEV · 3,680 FT
// Reported layers (highest → lowest)
CLR
No reported cloud layers — clear sky from surface to reporting ceiling.
// Computed
CEILING HIGHEST LAYER TOTAL COVERAGEclear FREEZING LEVEL17,720 ft VFR MARGINunlimited

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

11:41ZSUNRISE
19:32ZSOLAR NOON
03:23ZSUNSET
04:02ZCIVIL END
CURRENT16:18Z DAYLIGHT REMAINING11h 04m VFR NIGHT BEGINS04:02Z (11h 43m) DAY LENGTH15h 42m
Waning Crescent
ILLUMINATION11% MOONRISE09:09Z MOONSET00:51Z FULL MOON IN18 days

// Nearest reporting stations · 5 shown · 100 NM (sparse area)

// Area map · 80 NM radius · CartoDB Dark Matter + aeronautical overlay

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