Ralph Jacobs Airport (27LL) Area Aviation Weather & Runway Winds
Aviation weather near Ralph Jacobs Airport in Valmeyer, IL, decoded from the nearest reporting station (KCPS) — conditions, runway crosswinds, and free Telegram airport alerts.
Ralph Jacobs Airport (27LL) is a general aviation airport serving pilots in and around Valmeyer, IL at 400 ft. 27LL has no weather station of its own — conditions here are decoded from KCPS, about 14 nm away, the nearest reporting station, and local conditions can differ. Its 4 runways (10, 18, 28, 36) — longest 2,350 ft — are checked against the current wind in the crosswind table below. The nearest TAF is issued for KCPS. Track it in the ATIS Alerts Telegram bot to get alerts read from KCPS, the station this page is based on.
No weather station at this airport — showing the nearest station KCPS, 14 nm away.
Wind from the northeast (040°) at 7 kt, visibility 10+ statute miles, no cloud data, temperature 27°C (80°F), altimeter 29.86 inHg. Conditions are Visual Flight Rules (VFR).
METAR KCPS 290253Z 04007KT 10SM CLR 27/23 A2986 RMK AO2 SLP107 T02670228 53016 $
What changed at KCPS (nearest station)?
Since the 0153Z (8:53 PM CDT) report — compared automatically against the latest METAR.
- Pressure rising: altimeter 29.84 → 29.86 inHg.
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Current pilot readout for 27LL
Based on the nearest station (KCPS), 27LL is currently VFR with winds from 040° at 7 knots, visibility 10+ statute miles, and no ceiling reported. The strongest crosswind component is currently on runway 10, about 4 knots. Density altitude is approximately 1,950 ft (field elevation 400 ft). Review the latest TAF below for forecast changes before departure.
⚠️ Not for operational use. Always verify with official FAA-approved preflight weather sources before flight.
New to aviation weather? How to read a METAR → · What VFR/MVFR/IFR mean → · Decode any METAR/TAF → · Density altitude calculator →
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Track 27LL free on TelegramRunway wind check
Estimated head/tailwind and crosswind for each runway end from the current reported wind.
Use this section to quickly compare current wind alignment across available runways at 27LL. This is intended as a planning aid only and should not replace official performance calculations or pilot judgment.
| Runway | Length | Surface | Head / Tail | Crosswind |
|---|---|---|---|---|
| 10FAV | 1,950 ft | TURF | 5 kt head | 4 kt right |
| 18 | 2,350 ft | TURF | 5 kt head | 4 kt right |
| 28 | 1,950 ft | TURF | 5 kt head | 4 kt right |
| 36 | 2,350 ft | TURF | 5 kt head | 4 kt right |
Open the crosswind calculator — try your own wind and runway numbers →
24-hour trend
Wind, ceiling and flight category over the last 24 hours.
Over the last 23 h: wind 5→7 kt, ceiling unlimited → unlimited.
27LL weather radar
Live NEXRAD + lightning, with a 4-hour future-radar forecast — drag to pan, tap ⚡ to toggle lightning.
Live weather radar around Ralph Jacobs Airport in Valmeyer, IL: the NOAA/NWS NEXRAD composite updates about every five minutes, with NOAA lightning strike density overlaid. The loop plays the past 50 minutes, then continues into a future-radar forecast (+1 to +4 hours, NOAA HRRR model) so you can see where precipitation around 27LL is headed.
Radar: NOAA/NWS via IEM · Forecast: NOAA HRRR · Lightning: NOAA · Map © OpenStreetMap © CARTO
Forecast frames (amber label) are HRRR model guidance, not observed radar. Lightning strike density appears as a blue-white glow when strikes are detected in view. Radar and lightning coverage are limited in parts of Alaska, Hawaii, and offshore areas. Not for navigation.
Pilot reports (PIREPs) within 100 NM of 27LL
Reported by pilots in flight over the past 6 hours — via aviationweather.gov.
Show raw report
ARG UA /OV ARG360040/TM 0026/FL195/TP CRJ2/TA 07/IC TRACE MIX 195-215/RM ZME
ARG UAHeader — reporting station and UA: a routine pilot report.OV ARG360040Location — fix or navaid, optionally with a radial and distance in NM.TM 0026Reported at 00:26 UTC.FL195Altitude: 19,500 ft MSL.TP CRJ2Aircraft type reporting.TA 07Outside air temperature, °C.IC TRACE MIX 195-215Icing: trace mix 19,500–21,500 ft.RM ZMERemarks.Show raw report
FYG UA /OV FTZ166015 /TM 2223 /FL025 /TP P28A /SK OVC030 /WX FV10SM /TB NEG
FYG UAHeader — reporting station and UA: a routine pilot report.OV FTZ166015Location — fix or navaid, optionally with a radial and distance in NM.TM 2223Reported at 22:23 UTC.FL025Altitude: 2,500 ft MSL.TP P28AAircraft type reporting.SK OVC030Sky condition — cloud bases and tops in hundreds of feet MSL.WX FV10SMWeather and flight visibility observed.TB NEGTurbulence: none reported.⚠️ PIREPs are unverified pilot reports. Not for operational use — conditions change between reports.
Recent aviation weather trends at 27LL
From ATIS Alerts' hourly weather history.
Over the past 24 hours, the nearest station KCPS reported mostly VFR across 24 observations, with 0 flight-category changes. The lowest ceiling was 5,500 ft. Wind most often came from the N.
Most recent change: MVFR → VFR
- 10/18/28/36
- 100%
TAF — Terminal Aerodrome Forecast
Issued 2320Z (6:20 PM CDT)
TAF KCPS 282320Z 2900/2924 01006KT P6SM SCT250 FM290300 05006KT P6SM SKC
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Airport facts
Reference data from the OurAirports dataset.
- Type
- General aviation airport
- FAA LID
- 27LL
- City
- Valmeyer
- State
- Illinois
- Country
- United States
- Elevation
- 400 ft
- Coordinates
- 38.3751, -90.3193
- Runways
- 4
- Longest runway
- 2,350 ft
- Weather reporting
- Nearest station KCPS
- TAF
- Nearest KCPS
- Time zone
- America/Chicago
- Next sunset
- 21h 31m
Run a flight school, FBO, or club here? Embed 27LL's live status on your website — free →
Nearby airports
Compare nearby METAR/TAF stations within 25, 50 and 100 NM before departure or arrival.
Within 25 NM
8 airports+2 more within 25 NM
25–50 NM
8 airports+2 more within 50 NM
50–100 NM
8 airports+2 more within 100 NM
RC flying fields nearby
AMA model-aircraft club fields around this airport — live wind, crosswind & flyability on each page.
- Columbia R/C Flying Club Inc - Bluff Rd — Columbia, IL · 6 mi
- Buder Park — Fenton, MO · 15 mi
- Buder Park — Fenton, MO · 15 mi
27LL weather — frequently asked
What runways are available at 27LL?+
27LL has 4 runways — 10, 18, 28, 36; the longest is 2,350 ft. This page computes the live crosswind for each runway end from the current wind.
Where does the weather shown for 27LL come from?+
Ralph Jacobs Airport does not have its own weather station. Conditions shown here come from the nearest reporting station, KCPS, about 14 nm away — close enough for situational awareness, but local conditions at 27LL can differ.
Does 27LL have a TAF?+
Yes — the KCPS TAF is shown on this page below the current conditions.
Does 27LL broadcast D-ATIS?+
No — 27LL does not broadcast D-ATIS. Alerts for 27LL from the ATIS Alerts bot (@atisalerts_bot) are based on its METAR (via the nearest reporting station) instead.
Pilot PIREPs for Ralph Jacobs Airport (27LL)
Community-submittedCommunity-submitted airport notes from pilots about runway conditions, wildlife, FBOs, fuel, turbulence, ramp access, and local tips.
Read recent community-submitted pilot notes for Ralph Jacobs Airport, including runway conditions, wildlife activity, FBO/fuel notes, turbulence, ramp access, and local airport tips.
⚠️ Pilot PIREPs on ATIS Alerts are community-submitted airport notes for situational awareness only. They are not official FAA PIREPs, NOTAMs, weather briefings, airport advisories, or flight-planning guidance. Always verify with official FAA/NWS sources, airport management, ATC, and current publications.
No Pilot PIREPs have been submitted for 27LL yet. Recently flew here? Help the next pilot by leaving a quick airport note.
Pilot PIREPs are community pilot notes for situational awareness only — not official FAA PIREPs or advisories. Verify with official sources. Notes are moderated before they appear; helpful marks and reports help us keep them useful.
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⚠️ Not for operational use. Always verify with official FAA-approved preflight weather sources before flight.
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