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// Station · 5m ago

KJST

John Murtha Johnstown Cambria County Airport
CAT MVFR
WIND CALM
VIS 4.0 SM
CEILING OVC at 9,500 ft
T/Td 17.8°C / 17.8°C
ALTIM 30.03 inHg
WX -RA BR
ELEV 2,284 FT
40.3161°N / 78.8339°W
LOCATION · Johnstown, US
N
WIND
000°0 kt
KJST · 2,284 FT
© OSM · CartoDB

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

METRIC
NOW · 12Z
+6H
+12H
+18H
WIND
CALM
 
 
 
VIS
4.0 SM
 
 
 
CEILING
OVC095
 
 
 
LAYERS
FEW001 SCT075 OVC095
 
 
 
T / Td
18 / 18
 
 
 
ALTIM
30.03"
 
 
 

// Interpretation

MVFR — visibility 4.0 SM. Winds calm, visibility 4.0 SM, a few at 100 ft, scattered at 7,500 ft, and overcast at 9,500 ft. Reported weather: -RA BR. Would drop to IFR below 1,000 ft ceiling or 3 SM visibility, or rise back to VFR above 3,000 ft and 5 SM.

Loading TAF forecast narrative…

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

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// Raw observation METAR string + decoded

METAR KJST 271254Z AUTO 00000KT 4SM -RA BR FEW001 SCT075 OVC095 18/18 A3003 RMK AO2 SLP160 P0007 T01780178

KJST · day 27 at 12:54 UTC · winds calm · visibility 4.0 SM · a few clouds at 100 ft · scattered layer at 7,500 ft · overcast at 9,500 ft · temp 18°C / dewpoint 18°C · altimeter 30.03" Hg · weather: -RA BR · automated station w/ precipitation discriminator · sea-level pressure 1016.0 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
15 HDG 150° CALM 7,004'
33 HDG 330° CALM 7,004'
05 HDG 050° CALM 4,387'
23 HDG 230° CALM 4,387'
Pattern altitude: 3,284 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 +7°C

3,000FT
+716 FT ABOVE FIELD ELEV
// DA · LAST 24 HOURS ↘ -100 FT
3,600 3,200 2,800
24h AGO18h12h6hNOW
FIELD ELEV2,284 FT OAT+18°C ISA DELTA+7°C PRESSURE ALT2,172 FT
// Performance equivalent Operating here right now feels like operating at KBLF (Mercer County Airport, Bluefield, elev 2,857 ft) on a standard ISA day.
// Aircraft performance impact SIGNIFICANT
TAKEOFF ROLL CLIMB RATE
Single-engine propC172, PA-28, Cherokee
+30%
-21%
Turbo / high-perf pistonSR22T, Bonanza, Mooney
+21%
-14%
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 · 3 reported · highest to lowest

FT 0 5k 10k 15k 20k 25k FRZ LVL · 11,274 FT FEW001 SCT075 OVC095 · CEILING KJST ELEV · 2,284 FT
// Reported layers (highest → lowest)
OVC095
Overcast · base 9,500 ft AGL · 8 oktas
SCT075
Scattered · base 7,500 ft AGL · ~3–4 oktas
FEW001
Few · base 100 ft AGL · ~1–2 oktas
// Computed
CEILING9,500 ft AGL HIGHEST LAYER9,500 ft TOTAL COVERAGE~100% (overcast) FREEZING LEVEL11,274 ft VFR MARGIN+6,500 ft

// Sun & Moon · times in Z · bar = local day (UTC-5)

09:51ZSUNRISE
17:13ZSOLAR NOON
00:36ZSUNSET
01:08ZCIVIL END
CURRENT12:59Z DAYLIGHT REMAINING11h 36m VFR NIGHT BEGINS01:08Z (12h 08m) DAY LENGTH14h 44m
Waxing Gibbous
ILLUMINATION83% MOONRISE18:38Z MOONSET09:23Z FULL MOON IN4 days

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

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

© OpenStreetMap · CartoDB · OpenAIP
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