ATIS Alerts

Otterbach Farm Airport (81LL) Area Aviation Weather & Runway Winds

Aviation weather near Otterbach Farm Airport in Mendota, IL, decoded from the nearest reporting station (KVYS) — conditions, runway crosswinds, and free Telegram airport alerts.

Otterbach Farm Airport (81LL) is a general aviation airport serving pilots in and around Mendota, IL at 840 ft. 81LL has no weather station of its own — conditions here are decoded from KVYS, about 13 nm away, the nearest reporting station, and local conditions can differ. Its 2 runways (NW, SE) — longest 1,600 ft — are checked against the current wind in the crosswind table below. The nearest TAF is issued for KRFD. Track it in the ATIS Alerts Telegram bot to get alerts read from KVYS, the station this page is based on.

VFR
Observed 0338Z (10:38 PM CDT)live · refreshes every 60s

No weather station at this airport — showing the nearest station KVYS, 13.3 nm away.

Wind
080° 6 kt
Visibility
10+ sm
Ceiling
Unlimited
Altimeter
29.93"
Temp / Dew
21°C / 70°F
dew 16°C

Wind from the east (080°) at 6 kt, visibility 10+ statute miles, no cloud data, temperature 21°C (70°F), altimeter 29.93 inHg. Conditions are Visual Flight Rules (VFR).

Raw METAR
METAR KVYS 290338Z AUTO 08006KT 10SM CLR 21/16 A2993 RMK AO2

What changed at KVYS (nearest station)?

Since the 0318Z (10:18 PM CDT) report — compared automatically against the latest METAR.

No significant changes since the 0318Z report — conditions are holding steady.

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Current pilot readout for 81LL

Based on the nearest station (KVYS), 81LL is currently VFR with winds from 080° at 6 knots, visibility 10+ statute miles, and no ceiling reported. The strongest crosswind component is currently on runway NW, about 6 knots. Density altitude is approximately 1,750 ft (field elevation 840 ft). 81LL does not publish a TAF — the nearest TAF station is KRFD, about 38 nm away.

⚠️ 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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Runway 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 81LL. This is intended as a planning aid only and should not replace official performance calculations or pilot judgment.

RunwayHead / TailCrosswind
NWFAV1 kt head6 kt right
SE1 kt head6 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.

Wind (kt)Gusts (kt)Bottom strip — flight category:VFRMVFRIFRLIFRNo report
0102003Z13Z03Z

Over the last 24 h: wind 9→6 kt, ceiling 5,500 ft → unlimited.

81LL weather radar

Live NEXRAD + lightning, with a 4-hour future-radar forecast — drag to pan, tap ⚡ to toggle lightning.

Live weather radar around Otterbach Farm Airport in Mendota, 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 81LL is headed.

Loading…
Loading radar…

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 81LL

Reported by pilots in flight over the past 6 hours — via aviationweather.gov.

PIREP0340Z (10:40 PM CDT) · 100 NM NE of 81LL · during descent · A319
Show raw report
MKE UA /OV MKE190000/TM 0340/FL000/TP A319/WV 010004/RM NEG WINDSHEAR-MICROBURST ON FINAL.
MKE UAHeader — reporting station and UA: a routine pilot report.
OV MKE190000Location — fix or navaid, optionally with a radial and distance in NM.
TM 0340Reported at 03:40 UTC.
FL000Altitude: 0 ft MSL.
TP A319Aircraft type reporting.
WV 010004Wind (direction/speed) or wind-shear remarks.
RM NEG WINDSHEAR-MICROBURST …Remarks.
PIREP0213Z (9:13 PM CDT) · 67 NM NE of 81LL · 23,000 ft MSL · B763
Show raw report
PWK UA /OV OBK/TM 0213/FL230/TP B763/TB NEG
PWK UAHeader — reporting station and UA: a routine pilot report.
OV OBKLocation — fix or navaid, optionally with a radial and distance in NM.
TM 0213Reported at 02:13 UTC.
FL230Altitude: 23,000 ft MSL.
TP B763Aircraft type reporting.
TB NEGTurbulence: none reported.
PIREP0208Z (9:08 PM CDT) · 83 NM NE of 81LL · during climb · CRJ2
Show raw report
ENW UA /OV ENW/TM 0208/FL160/TP CRJ2/TB NEG/RM DURC
ENW UAHeader — reporting station and UA: a routine pilot report.
OV ENWLocation — fix or navaid, optionally with a radial and distance in NM.
TM 0208Reported at 02:08 UTC.
FL160Altitude: 16,000 ft MSL.
TP CRJ2Aircraft type reporting.
TB NEGTurbulence: none reported.
RM DURCRemarks.
PIREP0207Z (9:07 PM CDT) · 68 NM W of 81LL · 43,000 ft MSL · G280
Show raw report
MLI UA /OV MZV/TM 0207/FL430/TP G280/TB NEG
MLI UAHeader — reporting station and UA: a routine pilot report.
OV MZVLocation — fix or navaid, optionally with a radial and distance in NM.
TM 0207Reported at 02:07 UTC.
FL430Altitude: 43,000 ft MSL.
TP G280Aircraft type reporting.
TB NEGTurbulence: none reported.
PIREP0206Z (9:06 PM CDT) · 31 NM SW of 81LL · 33,000 ft MSL · B739
Show raw report
C75 UA /OV BDF/TM 0206/FL330/TP B739/TB NEG
C75 UAHeader — reporting station and UA: a routine pilot report.
OV BDFLocation — fix or navaid, optionally with a radial and distance in NM.
TM 0206Reported at 02:06 UTC.
FL330Altitude: 33,000 ft MSL.
TP B739Aircraft type reporting.
TB NEGTurbulence: none reported.
PIREP0206Z (9:06 PM CDT) · 95 NM N of 81LL · 19,000 ft MSL · BCS1
Show raw report
MSN UA /OV MSN/TM 0206/FL190/TP BCS1/TB NEG
MSN UAHeader — reporting station and UA: a routine pilot report.
OV MSNLocation — fix or navaid, optionally with a radial and distance in NM.
TM 0206Reported at 02:06 UTC.
FL190Altitude: 19,000 ft MSL.
TP BCS1Aircraft type reporting.
TB NEGTurbulence: none reported.
PIREP0204Z (9:04 PM CDT) · 85 NM SE of 81LL · 25,000 ft MSL · E170
intermittent light chop turbulence
Show raw report
TIP UA /OV RBS190015/TM 0204/FL250/TP E170/TB INTMT LGT CHOP
TIP UAHeader — reporting station and UA: a routine pilot report.
OV RBS190015Location — fix or navaid, optionally with a radial and distance in NM.
TM 0204Reported at 02:04 UTC.
FL250Altitude: 25,000 ft MSL.
TP E170Aircraft type reporting.
TB INTMT LGT CHOPTurbulence: intermittent light chop.
PIREP0123Z (8:23 PM CDT) · 49 NM SE of 81LL · 21,000 ft MSL · B39M
Show raw report
JOT UA /OV JOT180030/TM 0123/FL210/TP B39M/TB NEG
JOT UAHeader — reporting station and UA: a routine pilot report.
OV JOT180030Location — fix or navaid, optionally with a radial and distance in NM.
TM 0123Reported at 01:23 UTC.
FL210Altitude: 21,000 ft MSL.
TP B39MAircraft type reporting.
TB NEGTurbulence: none reported.

⚠️ PIREPs are unverified pilot reports. Not for operational use — conditions change between reports.

Recent aviation weather trends at 81LL

From ATIS Alerts' hourly weather history.

Over the past 24 hours, the nearest station KVYS reported mostly VFR across 54 observations, with 4 flight-category changes. The strongest gust reached 17 kt, the lowest ceiling was 1,800 ft. Wind most often came from the N.

Last 24 hours
VFR 94%MVFR 6%
Wind avg/max: 6/12 kt
Max gust: 17 kt
Lowest ceiling: 1,800 ft
Lowest vis: —
Prevailing wind: N
Category changes: 4

Most recent change: MVFR → VFR

Last 7 days
VFR 68%MVFR 21%IFR 5%LIFR 7%
Wind avg/max: 4/13 kt
Max gust: 21 kt
Lowest ceiling: 300 ft
Lowest vis: 0.25 sm
Prevailing wind: S
Category changes: 29

Most recent change: MVFR → VFR

Active Runway - past 30 days
NW/SE
100%

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Airport facts

Reference data from the OurAirports dataset.

Type
General aviation airport
FAA LID
81LL
City
Mendota
State
Illinois
Country
United States
Elevation
840 ft
Coordinates
41.5723, -89.1714
Runways
2
Longest runway
1,600 ft
Weather reporting
Nearest station KVYS
TAF
Nearest KRFD
Time zone
America/Chicago
Next sunset
21h 25m

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Nearby airports

Compare nearby METAR/TAF stations within 25, 50 and 100 NM before departure or arrival.

VFRMVFRIFRLIFRNo report

RC flying fields nearby

AMA model-aircraft club fields around this airport — live wind, crosswind & flyability on each page.

All RC flying fields →

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81LL weather — frequently asked

What runways are available at 81LL?+

81LL has 2 runways — NW, SE; the longest is 1,600 ft. This page computes the live crosswind for each runway end from the current wind.

Where does the weather shown for 81LL come from?+

Otterbach Farm Airport does not have its own weather station. Conditions shown here come from the nearest reporting station, KVYS, about 13 nm away — close enough for situational awareness, but local conditions at 81LL can differ.

Does 81LL have a TAF?+

No — 81LL does not publish its own TAF. The nearest TAF station is KRFD, about 38 nm away.

Does 81LL broadcast D-ATIS?+

No — 81LL does not broadcast D-ATIS. Alerts for 81LL from the ATIS Alerts bot (@atisalerts_bot) are based on its METAR (via the nearest reporting station) instead.

Pilot PIREPs for Otterbach Farm Airport (81LL)

Community-submitted

Community-submitted airport notes from pilots about runway conditions, wildlife, FBOs, fuel, turbulence, ramp access, and local tips.

Read recent community-submitted pilot notes for Otterbach Farm 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 81LL 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.

From the ATIS Alerts team

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