Union County Airport (KMRT) Aviation Weather, METAR, TAF & ATIS Alerts
Live aviation weather for Union County Airport in Marysville, OH, including METAR, TAF, flight category, wind, visibility, ceiling, altimeter, runway crosswinds, and Telegram airport alerts.
Union County Airport (KMRT) is a general aviation airport serving pilots in and around Marysville, OH at 1,021 ft. KMRT reports its own METAR — decoded live on this page as flight category, wind, visibility, ceiling and altimeter. Its 2 runways (09, 27) — longest 4,218 ft — are checked against the current wind in the crosswind table below. Automated weather is broadcast on 119.275. Track KMRT in the ATIS Alerts Telegram bot to get a message when a new METAR changes the picture — flight category, wind, or ceiling past your selected minimums.
Wind from the north (360°) at 7 kt, visibility 10+ statute miles, broken clouds at 3,400 ft, temperature 24°C (75°F), altimeter 29.79 inHg. Conditions are Visual Flight Rules (VFR), ceiling 3,400 ft.
METAR KMRT 290055Z AUTO 36007KT 10SM BKN034 24/21 A2979 RMK AO2
What changed at KMRT?
Since the 0035Z (8:35 PM EDT) report — compared automatically against the latest METAR.
- A ceiling formed at 3,400 ft.
This is exactly what ATIS Alerts watches for you — get a Telegram message when KMRT's weather changes, free →
Current pilot readout for KMRT
KMRT is currently VFR with winds from 360° at 7 knots, visibility 10+ statute miles, and a 3,400 ft ceiling. The strongest crosswind component is currently on runway 09, about 7 knots. Density altitude is approximately 2,500 ft (field elevation 1,021 ft). KMRT does not publish a TAF — the nearest TAF station is KCMH, about 25 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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Stop refreshing aviation weather manually. Track KMRT in ATIS Alerts and get notified when a new METAR changes the picture — a category drop, or wind and ceiling moving toward your minimums.
Track KMRT 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 KMRT. This is intended as a planning aid only and should not replace official performance calculations or pilot judgment.
| Runway | Length | Surface | Head / Tail | Crosswind |
|---|---|---|---|---|
| 09FAV | 4,218 ft | ASP | 1 kt head | 7 kt left |
| 27 | 4,218 ft | ASP | 1 kt tail | 7 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 24 h: wind 6→7 kt, ceiling unlimited → 3,400 ft.
KMRT weather radar
Live NEXRAD + lightning, with a 4-hour future-radar forecast — drag to pan, tap ⚡ to toggle lightning.
Live weather radar around Union County Airport in Marysville, OH: 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 KMRT 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 KMRT
Reported by pilots in flight over the past 6 hours — via aviationweather.gov.
Show raw report
CLE UA /OV 10 NW MFD/TM 2332/FL030/TP C172/SK VMC/WX 10 SM
CLE UAHeader — reporting station and UA: a routine pilot report.OV 10 NW MFDLocation — fix or navaid, optionally with a radial and distance in NM.TM 2332Reported at 23:32 UTC.FL030Altitude: 3,000 ft MSL.TP C172Aircraft type reporting.SK VMCSky condition — cloud bases and tops in hundreds of feet MSL.WX 10 SMWeather and flight visibility observed.Show raw report
LPR UA /OV DJB080015/TM 2330/FL430/TP E55P/TB OCNL MOD CHOP/RM ZOB
LPR UAHeader — reporting station and UA: a routine pilot report.OV DJB080015Location — fix or navaid, optionally with a radial and distance in NM.TM 2330Reported at 23:30 UTC.FL430Altitude: 43,000 ft MSL.TP E55PAircraft type reporting.TB OCNL MOD CHOPTurbulence: occasional moderate chop.RM ZOBRemarks.Show raw report
FWA UA /OV FWA/TM 2321/FL030/TP CL35/SK B033
FWA UAHeader — reporting station and UA: a routine pilot report.OV FWALocation — fix or navaid, optionally with a radial and distance in NM.TM 2321Reported at 23:21 UTC.FL030Altitude: 3,000 ft MSL.TP CL35Aircraft type reporting.SK B033Sky condition — cloud bases and tops in hundreds of feet MSL.Show raw report
CVG UA /OV CVG360008/TM 2254/FLDURC/TP CRJ9/SK B042 BKN T051
CVG UAHeader — reporting station and UA: a routine pilot report.OV CVG360008Location — fix or navaid, optionally with a radial and distance in NM.TM 2254Reported at 22:54 UTC.FLDURCReported during climb.TP CRJ9Aircraft type reporting.SK B042 BKN T051Sky condition — cloud bases and tops in hundreds of feet MSL.Show raw report
CMH UA /OV MRT/TM 2251/FL100/TP C750/TB MOD TURB
CMH UAHeader — reporting station and UA: a routine pilot report.OV MRTLocation — fix or navaid, optionally with a radial and distance in NM.TM 2251Reported at 22:51 UTC.FL100Altitude: 10,000 ft MSL.TP C750Aircraft type reporting.TB MOD TURBTurbulence: moderate turb.Show raw report
FWA UA /OV FWA/TM 2251/FLDURD/TP E175/WX MVFR NO CLEAR BASE OR TOP
FWA UAHeader — reporting station and UA: a routine pilot report.OV FWALocation — fix or navaid, optionally with a radial and distance in NM.TM 2251Reported at 22:51 UTC.FLDURDReported during descent.TP E175Aircraft type reporting.WX MVFR NO CLEAR BASE OR TOPWeather and flight visibility observed.Show raw report
CLE UA /OV 15 NW CLE/TM 2229/FLDURD/TP A21N/WX VMC/RM 075 AND BELOW
CLE UAHeader — reporting station and UA: a routine pilot report.OV 15 NW CLELocation — fix or navaid, optionally with a radial and distance in NM.TM 2229Reported at 22:29 UTC.FLDURDReported during descent.TP A21NAircraft type reporting.WX VMCWeather and flight visibility observed.RM 075 AND BELOWRemarks.Show raw report
TOL UA /OV KTOL /TM 2125 /FL095 /TP RV8 /TA 10 /WV 33024KT /RM BKN BLO
TOL UAHeader — reporting station and UA: a routine pilot report.OV KTOLLocation — fix or navaid, optionally with a radial and distance in NM.TM 2125Reported at 21:25 UTC.FL095Altitude: 9,500 ft MSL.TP RV8Aircraft type reporting.TA 10Outside air temperature, °C.WV 33024KTWind (direction/speed) or wind-shear remarks.RM BKN BLORemarks.⚠️ PIREPs are unverified pilot reports. Not for operational use — conditions change between reports.
Recent aviation weather trends at KMRT
From ATIS Alerts' hourly weather history.
Over the past 24 hours, KMRT reported a mix of conditions, most often VFR across 72 observations, with 16 flight-category changes. The strongest gust reached 19 kt, the lowest ceiling was 200 ft. Wind most often came from the S.
Most recent change: MVFR → VFR
Most recent change: MVFR → VFR
- 27
- 65%
- 09
- 35%
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Airport facts
Reference data from the OurAirports dataset.
- Type
- General aviation airport
- ICAO
- KMRT
- FAA LID
- MRT
- City
- Marysville
- State
- Ohio
- Country
- United States
- Elevation
- 1,021 ft
- Coordinates
- 40.2247, -83.3516
- Runways
- 2
- Longest runway
- 4,218 ft
- Weather reporting
- Reports METAR
- TAF
- Nearest KCMH
- AWOS/ASOS
- 119.275 MHz
- Time zone
- America/New_York
- Next sunset
- 23h 43m
Run a flight school, FBO, or club here? Embed KMRT'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
9 airports+3 more within 25 NM
25–50 NM
7 airports+1 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.
- Mid Ohio Radio Kontrol Society - Springdale Rd — Marysville, OH · 4 mi
- Mid Ohio Soaring Society - Liberty Road — Delaware, OH · 14 mi
- Mid Ohio Soaring Society - West of YMCA — Powell, OH · 14 mi
Historical Flying Weather
2006–2025 · ATIS Alerts Flying Weather Index
Based on historical observations from 2006–2025, KMRT reported VFR conditions during about 73.4% of valid daylight observations, with an estimated 227 VFR flying days a year. July had the most VFR weather; January had the most instrument conditions. Surface winds averaged 6.1 kt, calm 20.1% of the time.
Full historical breakdown
Flight category by month
| Month | VFR % | MVFR % | IFR % | LIFR % |
|---|---|---|---|---|
| Jan | 54.0 | 30.5 | 9.1 | 6.3 |
| Feb | 61.1 | 24.8 | 8.9 | 5.2 |
| Mar | 71.3 | 18.0 | 7.5 | 3.3 |
| Apr | 79.1 | 13.1 | 5.4 | 2.4 |
| May | 80.3 | 11.6 | 5.6 | 2.4 |
| Jun | 81.9 | 11.3 | 4.7 | 2.1 |
| Jul | 83.7 | 11.2 | 3.7 | 1.4 |
| Aug | 81.7 | 11.5 | 4.0 | 2.7 |
| Sep | 78.3 | 11.5 | 6.3 | 3.9 |
| Oct | 76.0 | 14.6 | 6.0 | 3.4 |
| Nov | 72.3 | 18.3 | 6.0 | 3.3 |
| Dec | 54.3 | 30.0 | 9.3 | 6.4 |
Average wind by month
| Month | Mean wind (kt) |
|---|---|
| Jan | 7.6 kt |
| Feb | 7.3 kt |
| Mar | 7.5 kt |
| Apr | 7.4 kt |
| May | 6.1 kt |
| Jun | 5.7 kt |
| Jul | 4.3 kt |
| Aug | 3.8 kt |
| Sep | 4.1 kt |
| Oct | 5.8 kt |
| Nov | 6.8 kt |
| Dec | 6.8 kt |
Historical summary of past observations — not a forecast or safety rating. Always check the current METAR, TAF, and a weather briefing before flight.
KMRT weather — frequently asked
What runways are available at KMRT?+
KMRT has 2 runways — 09, 27; the longest is 4,218 ft. This page computes the live crosswind for each runway end from the current wind.
Does KMRT report its own weather?+
Yes — Union County Airport has its own weather station and publishes METAR observations, which this page decodes live.
Does KMRT have a TAF?+
No — KMRT does not publish its own TAF. The nearest TAF station is KCMH, about 25 nm away.
Does KMRT broadcast D-ATIS?+
No — KMRT does not broadcast D-ATIS. Alerts for KMRT from the ATIS Alerts bot (@atisalerts_bot) are based on its METAR instead.
Pilot PIREPs for Union County Airport (KMRT)
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 Union County 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 KMRT 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.
Why pilots use ATIS Alerts
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⚠️ Not for operational use. Always verify with official FAA-approved preflight weather sources before flight.
No D-ATIS at this airport — showing METAR.
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