// Station · 12m ago
KALN
St Louis Regional Airport
CAT IFR
WIND 200° / 9 kt
VIS 10+ SM
CEILING BKN at 500 ft
T/Td 24°C / 23°C
ALTIM 29.98 inHg
ELEV 544 FT
38.8903°N / 90.0460°W
LOCATION · Alton/St Louis, US
WIND
200°9 kt
KALN · 544 FT
© OSM · CartoDB
// Current + 24h forecast · METAR loaded · TAF loading…
METRIC
NOW · 14Z
+6H
+12H
+18H
WIND
200°/9
VIS
10+ SM
CEILING
BKN005
LAYERS
BKN005 OVC012
T / Td
24 / 23
ALTIM
29.98"
// Interpretation
IFR conditions — ceiling 500 ft. Moderate winds at 200°/9 kt, visibility better than 10 statute miles, broken at 500 ft, and overcast at 1,200 ft. Would deteriorate to LIFR below 500 ft ceiling or 1 SM, or improve to MVFR above 1,000 ft and 3 SM.
Loading TAF forecast narrative…
// Want this glance-able on 10 airports? METAR Deck →// Raw observation METAR string + decoded
METAR KALN 111450Z 20009KT 10SM BKN005 OVC012 24/23 A2998
KALN · day 11 at 14:50 UTC · wind from 200° at 9 kt · visibility 10+ SM · broken layer at 500 ft · overcast at 1,200 ft · temp 24°C / dewpoint 23°C · altimeter 29.98" Hg
// Runway analysis · computed from current METAR wind
Wind 200° @ 9 kt
3 USABLE · 1 AVOID · 2 CAUTION
WIND
200°9 kt
HEADWIND
CAUTION · HIGH XW
AVOID · TAILWIND
HEADWIND ENDS
3 usable
17★
HDG 170°
H8 kt
X4 kt RIGHT
PRIMARY · 6,500'
11
HDG 110°
H0 kt
X9 kt RIGHT
⚠ HIGH XW · 100%
29
HDG 290°
H0 kt
X9 kt LEFT
⚠ HIGH XW · 100%
TAILWIND ENDS · AVOID
1 ends
35
HDG 350°
T8 kt
X4 kt LEFT
—
Pattern altitude: 1,544 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 +10°C
1,700FT
+1,156 FT ABOVE FIELD ELEV
// DA · LAST 24 HOURS
↘ -500 FT
24h AGO18h12h6hNOW
FIELD ELEV544 FT
OAT+24°C
ISA DELTA+10°C
PRESSURE ALT482 FT
// Performance equivalent
Operating here right now feels like operating at KRKW
(Rockwood Municipal Airport, Rockwood, elev 1,664 ft)
on a standard ISA day.
// Aircraft performance impact
MINOR
TAKEOFF ROLL
CLIMB RATE
Single-engine propC172, PA-28, Cherokee
+17%
-12%
Turbo / high-perf pistonSR22T, Bonanza, Mooney
+12%
-8%
Light jetCJ4, Phenom 300, M2
+7%
-5%
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 · 2 reported · highest to lowest
// Sun & Moon · times in Z · bar = local day (UTC-6)
10:45ZSUNRISE
18:06ZSOLAR NOON
01:28ZSUNSET
01:59ZCIVIL END
CURRENT15:02Z
DAYLIGHT REMAINING10h 26m
VFR NIGHT BEGINS01:59Z (10h 57m)
DAY LENGTH14h 42m
Waning Crescent
ILLUMINATION11%
MOONRISE08:10Z
MOONSET22:53Z
FULL MOON IN18 days
// Nearest reporting stations · 5 shown · 60 NM radius
KSTL
MVFR
→
VFR
23Z
St. Louis Lambert International Airport · St Louis
- WIND
- 250° / 7 kt
- VIS
- 10+ SM
- CEILING
- OVC017
- DIST
- 17 NM SW
- AGE
- 11m ago
KSET
MVFR
St Charles County Regional Airport/Smartt Field · St Charles
- WIND
- 280° / 5 kt
- VIS
- 10+ SM
- CEILING
- BKN018
- DIST
- 18 NM W
- AGE
- 8m ago
KCPS
MVFR
→
VFR
20Z
St Louis Downtown Airport · Cahokia/St Louis
- WIND
- VRB / 3 kt
- VIS
- 10+ SM
- CEILING
- OVC013
- DIST
- 20 NM S
- AGE
- 1h 9m ago
KBLV
VFR
Scott AFB/Midamerica Airport · Belleville
- WIND
- 190° / 6 kt
- VIS
- 10+ SM
- CEILING
- BKN080
- DIST
- 23 NM SE
- AGE
- 20m ago
K3LF
MVFR
Litchfield Municipal Airport · Litchfield
- WIND
- 130° / 5 kt
- VIS
- 10+ SM
- CEILING
- BKN011
- DIST
- 24 NM NE
- AGE
- 7m ago
// Area map · 60 NM radius · CartoDB Dark Matter + aeronautical overlay
© OpenStreetMap · CartoDB · OpenAIP
//
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