William Robert Johnston Municipal Airport (KM90) Area Aviation Weather & Runway Winds
As of 11:55 AM PDT, Oct 28, based on the nearest station (KMAE), KM90 is currently VFR with winds from 290° at 7 knots gusting 14, visibility 10+ statute miles, and no ceiling reported.
Aviation weather near William Robert Johnston Municipal Airport in Mendota, CA, decoded from the nearest reporting station (KMAE): conditions and runway crosswinds.
William Robert Johnston Municipal Airport (KM90) is a general aviation airport serving pilots in and around Mendota, CA at a field elevation of 162 ft. KM90 has no weather station of its own. Conditions here are decoded from KMAE, about 19 nm away, the nearest reporting station, and local conditions can differ. It has one runway (15/33), the longest 3,499 ft. CTAF is 122.9.
No weather station at this airport: showing the nearest station KMAE, 18.6 nm away.
Wind from the west-northwest (290°) at 7 kt, gusting 14 kt, visibility 10+ statute miles, no cloud data, temperature 17°C (63°F), altimeter 30.05 inHg. Conditions are Visual Flight Rules (VFR).
METAR KMAE 281855Z AUTO 29007G14KT 10SM CLR 17/10 A3005 RMK AO2 SLP171 T01720100 FZRANO $
What changed at KMAE (nearest station)?
Since the 1755Z (10:55 AM PDT) report, compared automatically against the latest METAR.
- Gusts began, now gusting 14 kt.
Current pilot readout for KM90
Based on the nearest station (KMAE), KM90 is currently VFR with winds from 290° at 7 knots gusting 14, visibility 10+ statute miles, and no ceiling reported. the wind favors runway ends 33. Density altitude is approximately 300 ft (field elevation 162 ft). KM90 does not publish a TAF. The nearest TAF station is KFAT, about 31 nm away.
New to aviation weather? How to read a METAR → · What VFR/MVFR/IFR mean → · Decode any METAR/TAF → · Density altitude calculator →
Runway wind check
Estimated head/tailwind and crosswind for each runway end from the current reported wind.
| Runway | Length | Surface | Head / Tail | Crosswind |
|---|---|---|---|---|
| 33FAV | 3,499 ft | ASP | 4 kt head | 5 kt left (g11) |
| 15 | 3,499 ft | ASP | 4 kt tail | 5 kt right (g11) |
Open the crosswind calculator to try your own wind and runway numbers →
KM90 runways
1 physical runway · 2 runway ends. Each card opens the runway's intelligence page: equipment and lighting, LAHSO, frequencies, today's configuration, predicted use, history and approaches.
- Status not monitoredRunway 15/333,499 × 50 ft · ASPCurrent useno stated-runway source at KM90Wind
- 15
- 4 kt tailwind · 5 kt crosswind from right
- 33
- 4 kt headwind · 5 kt crosswind from left
no active equipment NOTAM receivedView Runway Intelligence →
“Current use” is what the facilitystates; wind components are arithmetic on the current METAR against TRUE headings; status reflects NOTAMs received through SWIM, the tower's TFDM record and the D-ATIS — a runway reads “Open” only with a complete NOTAM picture.
24-hour trend
Wind, ceiling and flight category over the last 24 hours.
Over the last 23 h: wind 8→7 kt, ceiling unlimited → unlimited.
KM90 weather radar
Live NEXRAD + lightning, with a 4-hour future-radar forecast. Drag to pan, tap ⚡ to toggle lightning.
Radar: NOAA/NWS via IEM · Forecast: NOAA HRRR · Lightning: NOAA · Map © Stadia Maps © OpenMapTiles © OpenStreetMap
NOAA NEXRAD composite and lightning, updated about every five minutes; amber frames are HRRR model guidance, not observed radar. Not for navigation.
Pilot reports (PIREPs) within 100 NM of KM90
Reported by pilots in flight over the past 6 hours, via aviationweather.gov.
Show raw report
VIS UA /OV TTE276022 /TM 1601 /FL380 /TP B38M /SK SCT-BKN380-TOP390 /TA M63 /WV 25034KT /RM PRODUCED BY SKYPATH
VIS UAHeader: reporting station and UA: a routine pilot report.OV TTE276022Location: fix or navaid, optionally with a radial and distance in NM.TM 1601Reported at 16:01 UTC.FL380Altitude: 38,000 ft MSL.TP B38MAircraft type reporting.SK SCT-BKN380-TOP390Sky condition: cloud bases and tops in hundreds of feet MSL.TA M63Outside air temperature, °C.WV 25034KTWind (direction/speed) or wind-shear remarks.RM PRODUCED BY SKYPATHRemarks.⚠️ PIREPs are unverified pilot reports. Not for operational use: conditions change between reports.
Recent aviation weather trends at KM90
From ATIS Alerts' hourly weather history.
Over the past 24 hours, the nearest station KMAE reported mostly VFR across 24 observations, with 0 flight-category changes. The strongest gust reached 14 kt, the lowest ceiling was 20,000 ft. Wind most often came from the NW.
Most recent change: MVFR → VFR
Share of hours each runway had the most headwind. From wind reports, not ATC assignments.
- 33
- 75%
- 15
- 25%
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Live crosswind meter
KM90 has no weather feed online, so the wind comes from KMAE, 19 nm away.
Wind is 51° off runway 33, the end with the most headwind right now.
Have a weather station at KM90? Help us make your field's weather available to every pilot, free. Add your field's wx station →Asphalt · 3,499 ft. Headings from FAA runway data. Not for navigation.
Field aerial
North up
Runway 15/33 drawn from FAA threshold coordinates.
Imagery: USGS The National Map (public domain). Something off? ✏️ Suggest an edit
Airport info
From the FAA airport record (cycle 2026-10-01) and OurAirports.
Services
- Attended
- Unattended
- Transient parking
- Tie-downs
- Landing fee
- No
- Control tower
- None
- Wind indicator
- Unlighted
Airport
- Type
- General aviation airport
- FAA LID
- M90
- City
- Mendota
- State
- California
- Country
- United States
- Elevation
- 162 ft
- Coordinates
- 36.7586, -120.3710
- Runways
- 1 physical runway · 2 runway ends
- Longest runway
- 3,499 ft
- Weather reporting
- Nearest station KMAE
- TAF
- Nearest KFAT
- CTAF
- 122.9 MHz
- Time zone
- America/Los_Angeles
- Sunset in
- 5h 28m
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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
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M90's real runway layout on the back, elevation and tower frequency on the front. Add your tail number on the sleeve.
Pilot PIREPs for William Robert Johnston Municipal Airport (KM90)
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 William Robert Johnston Municipal 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 KM90 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.
⚠️ Not for operational use. Always verify with official FAA-approved preflight weather sources before flight.
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