WxDecoder
KMQS · CTH

Chester County G O Carlson Airport

Coatesville, PennsylvaniaElevation 660 ftSmall airport
CURRENT STATUS
VFR11 min old
No ceiling, visibility 10 SM.
FLIGHT CATEGORY
VFR
ceiling & visibility
WIND
VRB@4
steady
VISIBILITY
10 SM
16.1 km
CEILING
None
no BKN/OVC layer
DENSITY ALT
1,567 ft
+907 ft vs field
CURRENT METAR

Decoded observation

Observed 0415Z (12:15 AM local) · 11 min old

KMQS is currently VFR. Winds are variable in direction at 4 knots. Visibility is 10 statute miles. There is no ceiling.

WIND
Variable at 4 kt
Steady.
VISIBILITY
10 statute miles
16.1 km, good.
CEILING & SKY
CLR
FEW and SCT layers are not ceilings.
TEMP / DEWPOINT
22°C / 20°C
72°F / 68°F. 2°C spread.
ALTIMETER
30.00 inHg
1015.9 hPa, near standard.
WEATHER & HAZARDS
No significant hazards
No precipitation or obscuration reported.

Codes in this report: AUTO CLR RMK AO2

Hover or tap any group for a plain-English explanation.

REMARKS: DECODED
AO2
automated station with a precipitation discriminator (can tell rain from snow)
T02200204
precise temperature 22.0°C, dew point 20.4°C
$
station needs maintenance
SUGGESTED RISK · TRAINING USE

Suggested risk level: Low

›No TAF available for this airport.

A suggested risk level for training and situational awareness only, not a go/no-go authority. Verify with official sources and apply your personal minimums.

FORECAST & PILOT NOTES · SUPPLEMENTAL

Extended forecast and pilot notes

Current aviation conditions show flight category VFR, wind variable at 4 kt, visibility 10 SM, ceiling none. Forecast suggests thursday chance showers and thunderstorms, high near 82F, low near 63F, 37% chance of precipitation. Key risks: thunderstorms in the forecast.

PILOT WEATHER NOTES
Thunderstorms in the forecastWeather.gov
Thursday: Chance Showers And Thunderstorms. Watch for developing convection and plan alternates.
DayConditionsTemp FWindGustsPrecipPilot note
Thursday Chance Showers And Thunderstorms 82/63 W 9 kt 22 kt 37% Thunderstorms in the forecast
Friday Mostly Sunny 77/58 N 4 kt – 1%
Saturday Partly Sunny then Chance Rain Showers 77/65 SE 9 kt – 69%
Sunday Showers And Thunderstorms Likely 80/65 SW 4 kt – 62%
Monday Mostly Sunny 79/62 N 4 kt – 3%
Tuesday Mostly Sunny 81/67 S 9 kt – 11%
Wednesday Mostly Sunny then Slight Chance Rain Showers 83 W 4 kt – 23%

Source: National Weather Service (office PHI). Forecast issued 0425Z.

AIR QUALITY

Air quality index

39 Good
Primary pollutant: PM2.5
Ozone 35 · PM2.5 39 · PM10 12

Wilmington Area, DE · observed 2026-09-09 23:00 EST · Source: AirNow (US EPA). Air-quality data for situational awareness, not an official health advisory.

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
1 runway · crosswind ranking
NESW1129VRB 4 ktVRB 4 ktVRB 4 ktVRB 4 ktVRB 4 kt
WIND USED
Wind calm or variable
Crosswind ranking is unavailable until the wind has a steady direction.
Components are estimates from the current METAR wind and runway heading. Verify with the Chart Supplement and NOTAMs.
RUNWAYS

Runway detail & declared distances

1 runway · longest 5,400 ft

11/29
Dimensions
5,400 x 100 ft
Surface
Asphalt (good)
Edge lights
HIGH
RWY 11102°T
REILYes
VGSIPAPI (P4R)
RWY 29282°T
ILSILS
REILYes
VGSIPAPI (P4L)
Traffic patternLeft

Runway data from the FAA NASR dataset (effective 2026-06-11). Verify with the current Chart Supplement and NOTAMs.

FIELD CONDITIONS

Performance & density altitude

Density altitude
1,567 ft
Pressure altitude
580 ft
Field elevation
660 ft MSL
Temperature
22°C (72°F)
Dewpoint
20°C (68°F)
Altimeter
30.00 inHg

Density altitude estimates how the aircraft performs versus standard atmosphere. Higher density altitude reduces climb performance and increases takeoff distance.

DAYLIGHT & NIGHT

Sun & logging windows

Sunset
2322Z 7:22 PM
Sunrise
1039Z 6:39 AM
Loggable night
2349Z (7:49 PM local) → 1012Z (6:12 AM local)
end of evening to start of morning civil twilight
Position lights required
2322Z (7:22 PM local) → 1039Z (6:39 AM local)
sunset to sunrise (91.209)
Night passenger currency
0022Z (8:22 PM local) → 0939Z (5:39 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

Chester County G O Carlson Airport is in Coatesville, Pennsylvania. Field elevation 660 ft MSL. Airport facts are drawn from OurAirports and the FAA NASR dataset.

OPERATIONS & CONTACT
OwnershipPublicly owned
UseOpen to the public
TypeSmall airport
ManagerCONNOR LAPPS
Manager phone610-802-2291
AttendedDaily, 0600–2200
CHARTS & AIRSPACE
ICAO / IATAKMQS / CTH
SectionalWASHINGTON
Center (ARTCC)NEW YORK
Flight service (AFSS)WILLIAMSPORT
RegionPennsylvania
CountryUnited States
Coordinates39.9790, -75.8655
Distance from city2 NM W
SERVICES & LIGHTING
Fuel100LL · Jet A
Control towerNon-towered
Field lightingSee remarks
BeaconSunset to sunrise · White-green (lighted land airport)
CTAF122.700
UNICOM122.700
FREQUENCIES

Communications

124.35
PHILADELPHIA APP/DEP
A/D
126.25
AWOS 3
AWOS
125.6
CLNC DEL
CLD
113.2
WILLIAMSPORT RDO
RDO
122.7
CTAF/UNICOM
UNIC
122.700
CTAF
CTAF
122.700
UNICOM
UNICOM

Not all tower/ground/approach frequencies are in our datasets. Verify with the FAA Chart Supplement.

AIRCRAFT ACTIVITY

KMQS traffic patterns

2026-06-13 to 2026-09-08, 40 days observed · data 2026-09-08

Medium confidence
TRAFFIC VOLUME (30-DAY)
AVG LANDINGS/DAY
18.2
AVG OPS/DAY
26.9
Activity trend over 9 days: rising, from 22 to 49 operations per dayOperations trend (9 days)

Busiest day: Thu · Busiest month: Sep

FLEET MIX
Piston single 58%Jet 19%Unknown 10%Twin 5%Helicopter 4%Turboprop 4%

Mostly small piston aircraft.

TOP AIRCRAFT TYPES
›C172 (Piston single) · ~27 landings/mo
›P28A (Piston single) · ~26 landings/mo
›C182 (Piston single) · ~9 landings/mo
›C180 (Piston single) · ~8 landings/mo
›M20P (Piston single) · ~7 landings/mo
LIKELY BASED AIRCRAFT
Low-confidence estimate

Aircraft likely based near this airport (estimate), mostly single-engine piston aircraft.

›P28A (Piston single)
›C172 (Piston single)
›SR20 (Piston single)
›M20P (Piston single)
›UNKN (Unknown)

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

Current flight category at nearby reporting stations.

KPTW Heritage Field
21 NM NE
VFR
KLNS Lancaster Airport
22 NM NW
VFR
KILG Wilmington Airport
22 NM SE
VFR
KRDG Reading Regional Airport (Carl A Spaatz Field)
24 NM N
VFR
KLOM Wings Field
29 NM E
VFR
KPHL Philadelphia International Airport
29 NM E
VFR
AIRPORT REMARKS

Operational remarks

›NOISE ABATEMENT PROC IN EFFECT, CTC AMGR CELL.
›+164 FT WATER TWR 1343 FT FM RY 11 THR 1842 FT R MKD WITH STROBE LGT DALGT HRS; STD OBSTN LGT NGT HRS.
›HELICOPTER OPS INVOF ARPT SOUTH AND SOUTHWEST OF RY 11 THLD.
›HOVER TAXI ALONG TXY ALPHA PROHIBITED. WHEEL TAXI ON TXY OR HOVER FM RY TO RAMP SIDE PARKING SPOT BY CROSSING PERPENDICULAR TO ALPHA.
›UNUSBL BYD 6 DEG LEFT OF CRS.
›MIGRATORY BIRDS & DEER ON & INVOF ARPT.
›FOR CD CTC PHILADELPHIA APCH AT 800-354-9884.
›DUSK-DAWN. ACTVT REIL RWY 11/29; HIRL RWY 11/29 - CTAF.
›FOR SVC AFTER HRS CNT 610-384-9000
›HELICOPTER TRAFFIC REQUESTED TO LAND AND TKOF FM RY ONLY. HELICOPTER HOVER TAXIING, TKOFS, & LNDGS PROHIBITED FM TWY ALPHA.
OFFICIAL LINKS & SOURCES
↗Official METAR on AviationWeather.gov
↗Search NOTAMs (official FAA NOTAM Search)
↗Official airport website
↗Wikipedia
↗KMQS on OurAirports
FREQUENTLY ASKED
Does KMQS have a METAR?
Yes. KMQS has a current METAR observation, decoded into plain English on this page.
Does KMQS have a TAF?
When KMQS issues a TAF, its decoded forecast timeline loads live on this page; otherwise use the nearest TAF-issuing field as a planning reference.
What is the field elevation at KMQS?
KMQS sits at 660 ft MSL, which factors into the density-altitude estimate on this page.
Is this an official preflight weather briefing for KMQS?
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.