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// Station · 24m ago

KRIV

March Air Reserve Base
CAT VFR
WIND CALM
VIS 10+ SM
CEILING CLR
T/Td 29.7°C / 10.7°C
ALTIM 29.98 inHg
ELEV 1,536 FT
33.8807°N / 117.2590°W
LOCATION · Riverside, US
N
WIND
000°0 kt
KRIV · 1,536 FT
© OSM · CartoDB

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

METRIC
NOW · 15Z
+6H
+12H
+18H
WIND
CALM
 
 
 
VIS
10+ SM
 
 
 
CEILING
CLR
 
 
 
LAYERS
 
 
 
T / Td
30 / 11
 
 
 
ALTIM
29.98"
 
 
 

// 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 KRIV 251555Z AUTO 00000KT 10SM CLR 30/11 A2998 RMK AO2 SLP134 T02970107

KRIV · day 25 at 15:55 UTC · winds calm · visibility 10+ SM · temp 30°C / dewpoint 11°C · altimeter 29.98" Hg · automated station w/ precipitation discriminator · sea-level pressure 1013.4 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 2 ends
14 HDG 140° CALM 13,302'
32 HDG 320° CALM 13,302'
Pattern altitude: 2,536 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

3,600FT
+2,064 FT ABOVE FIELD ELEV
// DA · LAST 24 HOURS loading…
FIELD ELEV1,536 FT OAT+30°C ISA DELTA+18°C PRESSURE ALT1,474 FT
// Performance equivalent Operating here right now feels like operating at KO26 (Lone Pine/Death Valley Airport, Lone Pine, elev 3,680 ft) on a standard ISA day.
// Aircraft performance impact SIGNIFICANT
TAKEOFF ROLL CLIMB RATE
Single-engine propC172, PA-28, Cherokee
+36%
-25%
Turbo / high-perf pistonSR22T, Bonanza, Mooney
+25%
-16%
Light jetCJ4, Phenom 300, M2
+14%
-11%

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 · 16,536 FT KRIV ELEV · 1,536 FT
// Reported layers (highest → lowest)
CLR
No reported cloud layers — clear sky from surface to reporting ceiling.
// Computed
CEILING HIGHEST LAYER TOTAL COVERAGEclear FREEZING LEVEL16,536 ft VFR MARGINunlimited

// Sun & Moon · times in Z · bar = local day (UTC-8)

13:19ZSUNRISE
19:52ZSOLAR NOON
02:25ZSUNSET
02:51ZCIVIL END
CURRENT16:19Z DAYLIGHT REMAINING10h 06m VFR NIGHT BEGINS02:51Z (10h 31m) DAY LENGTH13h 06m
Waxing Gibbous
ILLUMINATION94% MOONRISE23:21Z MOONSET12:28Z FULL MOON IN2 days

// Nearest reporting stations

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

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