WxDecoder

34IS Weather Jim Wehrli Memorial Airport

Marseilles, IllinoisElevation 630 ftSmall airport
OFF-FIELD REFERENCE
Nearest report: KVYS · 20 NM W · More than 1 hour old
No ceiling, visibility 10 SM.
No on-field report, so no field flight category. Conditions at the field may differ.
OFF-FIELD REFERENCE · KVYS
WIND
170@4
steady
VISIBILITY
10 SM
16.1 km
CEILING
None
no BKN/OVC layer
FORECAST & PILOT NOTES · SUPPLEMENTAL

Extended forecast and pilot notes

No aviation METAR is published for this airport. The nearest National Weather Service station reports visibility 10 SM. This observation is older than usual, so treat it with extra caution. Treat this as supplemental, not an aviation observation. Forecast suggests tonight mostly cloudy, low near 50F, 1% chance of precipitation. Key risks: thunderstorms in the forecast.

PILOT WEATHER NOTES
Thunderstorms in the forecastWeather.gov
Thursday: Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms. Watch for developing convection and plan alternates.
DayConditionsTemp FWindGustsPrecipPilot note
Tonight Mostly Cloudy 50 0 kt – 1%
Monday Mostly Cloudy 68/49 NE 9 kt – 3%
Tuesday Mostly Cloudy 71/55 SE 9 kt – 9%
Wednesday Mostly Sunny 73/57 S 9 kt – 9%
Thursday Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms 78/56 SW 9 kt – 29% Thunderstorms in the forecast
Friday Chance Rain Showers 77/57 S 4 kt – 30%
Saturday Chance Rain Showers 73/58 S 4 kt – 53%
Sunday Chance Rain Showers 71 SW 9 kt – 36%

Source: National Weather Service (office LOT). Forecast issued 0113Z.

Radar

Radar data: NOAA/NWS MRMS composite reflectivity. For situational awareness only, not a substitute for an official weather briefing.

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RUNWAYS & WIND
Crosswind calculator
No runway layout is available for 34IS. Enter a runway number or heading to estimate wind components.
RUNWAYS

Runway detail

N/S
Dimensions
2,600 x 70 ft
Surface
TURF
FIELD CONDITIONS

Field elevation

Field elevation
630 ft MSL

Density and pressure altitude need a current temperature and altimeter from the METAR.

DAYLIGHT & NIGHT

Sun & logging windows

Sunset
2259Z 5:59 PM
Sunrise
1219Z 7:19 AM
Loggable night
2327Z (6:27 PM local) → 1150Z (6:50 AM local)
end of evening to start of morning civil twilight
Position lights required
2259Z (5:59 PM local) → 1219Z (7:19 AM local)
sunset to sunrise (91.209)
Night passenger currency
2359Z (6:59 PM local) → 1119Z (6:19 AM local)
1 hr after sunset to 1 hr before sunrise (61.57(b))

FAA definitions, shown in Zulu with airport-local time. Verify for your operation.

AIRPORT INFORMATION

Facility & services

Jim Wehrli Memorial Airport is in Marseilles, Illinois. Field elevation 630 ft MSL. Airport facts are drawn from OurAirports and the FAA NASR dataset.

OPERATIONS & CONTACT
TypeSmall airport
CHARTS & AIRSPACE
ICAO / IATA34IS
RegionIllinois
CountryUnited States
Coordinates41.4448, -88.7167
SERVICES & LIGHTING
Control towerNon-towered
AIRCRAFT ACTIVITY

34IS traffic patterns

2026-07-24 to 2026-10-17, 2 days observed · data 2026-10-23

Low confidence
TRAFFIC VOLUME (30-DAY)
AVG LANDINGS/DAY
1
AVG OPS/DAY
2
Operations trend (1 days)

Busiest day: Fri · Busiest month: Jul

FLEET MIX
Turboprop 67%Helicopter 33%

Mostly turboprop aircraft.

TOP AIRCRAFT TYPES
›AT5T (Turboprop) · ~2 landings/mo
›AS50 (Helicopter) · ~1 landings/mo
LIKELY BASED AIRCRAFT
Low-confidence estimate

Aircraft likely based near this airport (estimate), mostly turboprop aircraft.

›AT5T (Turboprop)

This is an estimate based on repeated flight patterns, not registration data. Do not rely on it to identify specific aircraft or owners.

Data limitations (4)
›ADS-B coverage is incomplete; counts are an observed lower bound, not official totals.
›Some aircraft do not transmit usable ADS-B and are not counted.
›Aircraft types and based estimates are inferred and may be wrong.
›This is not official ATC, FAA, or airport data.
NEARBY AIRPORTS

Weather reference stations

34IS has no on-field report. Nearest reporting station: KVYS (20 NM W, VFR).

KVYS Illinois Valley Regional Airport Walter A Duncan Field
20 NM W
VFR
KARR Aurora Municipal Airport
22 NM NE
VFR
KJOT Joliet Regional Airport
25 NM E
VFR
KLOT Lewis University Airport
30 NM E
VFR
KDPA Dupage Airport
35 NM NE
VFR
KIKK Greater Kankakee Airport
45 NM SE
VFR
OFFICIAL LINKS & SOURCES
↗Search NOTAMs (official FAA NOTAM Search)
↗34IS on OurAirports
FREQUENTLY ASKED
Does 34IS have a METAR?
No on-field METAR is issued for 34IS. This page uses the nearest reporting station as a reference.
Does 34IS have a TAF?
No TAF is issued directly for 34IS. Use the nearest TAF-issuing field as a planning reference.
What is the field elevation at 34IS?
34IS sits at 630 ft MSL, which factors into the density-altitude estimate on this page.
Is this an official preflight weather briefing for 34IS?
No. wxdecoder.com is for education and situational awareness only. It is not an official weather briefing or a substitute for official sources, NOTAM review, and pilot judgment.
This app is for aviation weather education, training, and situational awareness only. It is not a substitute for an official weather briefing, approved flight-planning software, flight service, dispatch procedures, current FAA regulations, or pilot judgment. Always verify weather with official sources before flight.