WxDecoder

MD42 Weather Keymar Airpark

Keymar, MarylandElevation 437 ftSmall airport
OFF-FIELD REFERENCE
Nearest report: KFDK · 14 NM SW · 57 min old
No ceiling, visibility 10 SM.
No on-field report, so no field flight category. Conditions at the field may differ.
OFF-FIELD REFERENCE · KFDK
WIND
Calm
no steady wind
VISIBILITY
10 SM
16.1 km
CEILING
None
no BKN/OVC layer
ACTIVE NWS ALERTS

Active weather alerts

Frost AdvisoryMinor · Expected · Likely
26 0500Z to 26 1300Z
Carroll; Northern Baltimore; Cecil; Northwest Montgomery; Central and Southeast Montgomery; Northwest Howard; Central and Southeast Howard; Northwest Harford; Southeast Harford; Albemarle; Greene; Madison; Rappahannock; Orange; Culpeper; Fairfax; Stafford; Spotsylvania; Northern Fauquier; Southern Fauquier; Eastern Loudoun; Northwest Prince William; Central and Southeast Prince William/Manassas/Manassas Park
* WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Portions of central and northern Maryland, and central and northern Virginia. * WHEN...From 1 AM to 9 AM EDT Monday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. * ADDITIONAL DETAILS...The lowest temperatures and subsequent frost potential are exp…
Take steps now to protect tender plants from the cold.

Alerts from the National Weather Service. For situational awareness only; always confirm against an official briefing.

FORECAST & PILOT NOTES · SUPPLEMENTAL

Extended forecast and pilot notes

No aviation METAR is published for this airport. The nearest National Weather Service station reports wind from 130° at 1 kt, visibility 10 SM, temperature 10C. Treat this as supplemental, not an aviation observation. Forecast suggests tonight mostly clear then areas of frost, low near 33F, 0% chance of precipitation. Key risks: no significant hazards are highlighted right now, but always confirm against an official briefing.

DayConditionsTemp FWindGustsPrecipPilot note
Tonight Mostly Clear then Areas Of Frost 33 S 1 kt – 0%
Monday Widespread Frost then Sunny 70/45 SW 4 kt – 1%
Tuesday Sunny 66/42 NE 5 kt – 0%
Wednesday Partly Sunny 65/45 SE 4 kt – 0%
Thursday Mostly Sunny 71/48 S 4 kt – 0%
Friday Sunny 75/50 W 2 kt – 0%
Saturday Mostly Sunny 72/54 S 3 kt – 4%
Sunday Chance Rain Showers 70 S 5 kt – 32%

Source: National Weather Service (office LWX). Forecast issued 0044Z.

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 MD42. Enter a runway number or heading to estimate wind components.
RUNWAYS

Runway detail & declared distances

1 runway · longest 1,950 ft

05/23
Dimensions
1,950 x 100 ft
Surface
Turf
RWY 05
Traffic patternRight
RWY 23
Traffic patternLeft

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

FIELD CONDITIONS

Field elevation

Field elevation
437 ft MSL

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

DAYLIGHT & NIGHT

Sun & logging windows

Sunset
2216Z 6:16 PM
Sunrise
1130Z 7:30 AM
Loggable night
2243Z (6:43 PM local) → 1102Z (7:02 AM local)
end of evening to start of morning civil twilight
Position lights required
2216Z (6:16 PM local) → 1130Z (7:30 AM local)
sunset to sunrise (91.209)
Night passenger currency
2316Z (7:16 PM local) → 1030Z (6:30 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

Keymar Airpark is in Keymar, Maryland. Field elevation 437 ft MSL. Airport facts are drawn from OurAirports and the FAA NASR dataset.

OPERATIONS & CONTACT
OwnershipPrivately owned
UsePrivate use
TypeSmall airport
ManagerPETER MASTROPIER/CHELSEA MASTROPIER
Manager phone410-591-6088
AttendedUNATNDD
CHARTS & AIRSPACE
ICAO / IATAMD42
SectionalWASHINGTON
Center (ARTCC)NEW YORK
Flight service (AFSS)LEESBURG
RegionMaryland
CountryUnited States
Coordinates39.6194, -77.2285
Distance from city2 NM NE
SERVICES & LIGHTING
Control towerNon-towered
AIRCRAFT ACTIVITY

MD42 traffic patterns

2026-06-30 to 2026-10-21, 5 days observed · data 2026-10-23

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

Busiest day: Tue · Busiest month: Jul

FLEET MIX
Piston single 100%

Mostly small piston aircraft.

TOP AIRCRAFT TYPES
›C172 (Piston single) · ~1 landings/mo
›P28A (Piston single) · ~1 landings/mo
›RS20 (Piston single) · ~1 landings/mo
›RV12 (Unknown) · ~0 landings/mo
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

MD42 has no on-field report. Nearest reporting station: KFDK (14 NM SW, VFR).

KFDK Frederick Municipal Airport
14 NM SW
VFR
KHGR Hagerstown Regional Richard A Henson Field
24 NM W
VFR
KTHV York Airport
24 NM NE
VFR
KGAI Montgomery County Airpark
27 NM S
VFR
KBWI Baltimore/Washington International Thurgood Marshall Airport
37 NM SE
VFR
KMRB Eastern WV Regional Airport/Shepherd Field
37 NM W
VFR
AIRPORT REMARKS

Operational remarks

›EMERGENCY.
›FOR CD CTC POTOMAC APCH AT 866-709-4993.
›POWERED PRCHT OPS NA EFF 16 OCT 23 UFN.
›LIGHT SPORT AIRCRAFT AND ULTRALIGHT VEHICLES ON & INVOF ARPT.
OFFICIAL LINKS & SOURCES
↗Search NOTAMs (official FAA NOTAM Search)
↗MD42 on OurAirports
FREQUENTLY ASKED
Does MD42 have a METAR?
No on-field METAR is issued for MD42. This page uses the nearest reporting station as a reference.
Does MD42 have a TAF?
No TAF is issued directly for MD42. Use the nearest TAF-issuing field as a planning reference.
What is the field elevation at MD42?
MD42 sits at 437 ft MSL, which factors into the density-altitude estimate on this page.
Is this an official preflight weather briefing for MD42?
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.