WxDecoder

KHEF/MNZ METAR Washington Manassas Harry P. Davis Field

Manassas, VirginiaElevation 192 ftMedium airport
CURRENT STATUS
VFR47 min old
No ceiling, visibility 10 SM.
FLIGHT CATEGORY
VFR
ceiling & visibility
WIND
240@5
steady
VISIBILITY
10 SM
16.1 km
CEILING
None
no BKN/OVC layer
DENSITY ALT
142 ft
-50 ft vs field
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.

CURRENT METAR

Decoded observation

Observed 1956Z (3:56 PM local) · 47 min old

KHEF is currently VFR. Winds are from the southwest at 5 knots. Visibility is 10 statute miles. There is no ceiling.

WIND
240° at 5 kt
Steady.
VISIBILITY
10 statute miles
16.1 km, good.
CEILING & SKY
CLR
FEW and SCT layers are not ceilings.
TEMP / DEWPOINT
19°C / 8°C
66°F / 46°F. 11°C spread.
ALTIMETER
30.49 inHg
1032.5 hPa, above standard.
WEATHER & HAZARDS
No significant hazards
No precipitation or obscuration reported.

Codes in this report: 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)
SLP331
sea-level pressure 1033.1 hPa
T01890083
precise temperature 18.9°C, dew point 8.3°C
$
station needs maintenance
FAA: no delays reported at MNZ.

Source: FAA System Operations (ASWS). Operational status only; verify with official FAA sources and NOTAMs.

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 from 240° at 5 kt, visibility 10 SM, ceiling none. Forecast suggests this afternoon sunny, high near 66F, low near 34F, 0% chance of precipitation. Key risks: no significant hazards are highlighted right now, but always confirm against an official briefing.

DayConditionsTemp FWindGustsPrecipPilot note
This Afternoon Sunny 66/34 S 3 kt – 0%
Monday Areas Of Frost then Sunny 71/43 NW 4 kt – 0%
Tuesday Sunny 71/44 N 6 kt – 0%
Wednesday Partly Sunny 68/44 E 5 kt – 0%
Thursday Mostly Sunny 72/47 S 5 kt – 0%
Friday Sunny 77/50 W 2 kt – 0%
Saturday Mostly Sunny 74/53 E 5 kt – 5%

Source: National Weather Service (office LWX). Forecast issued 2042Z.

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
2 runways · crosswind ranking
ON-FIELD METAR
NESW16R34L16L34R 240°240°5 kt240°240° 5240°
READING THE BARB · SWIPE FOR MORE →
Calm
5 kt
10 kt
15 kt
20 kt
25 kt
30 kt
35 kt
40 kt
45 kt
50 kt
65 kt
75 kt
100 kt
105 kt
Half feather = 5 kt, full = 10 kt, filled pennant = 50 kt; add them up. The staff points the direction the wind blows from.
WIND USED
240° at 5 kt
Components computed from the current on-field METAR wind.
RECOMMENDED
RWY 16R0 kt headwind · 5 kt crosswind
RUNWAYS BY WIND · best end
16R
HEAD
0 kt
CROSS
5 kt R
BEST
16L
HEAD
0 kt
CROSS
5 kt R
OK
34L
HEAD
0 kt tail
CROSS
5 kt L
OK
34R
HEAD
0 kt tail
CROSS
5 kt L
OK
Components are estimates from the current METAR wind and runway heading. Verify with the Chart Supplement and NOTAMs.
RUNWAYS

Runway detail & declared distances

2 runways · longest 6,200 ft

16R/34L
Dimensions
3,715 x 75 ft
Surface
Asphalt (excellent)
Edge lights
MED
RWY 16R151°T
REILYes
VGSIPAPI (P2L)
Traffic patternRight
RWY 34L331°T
REILYes
VGSIPAPI (P2L)
Traffic patternLeft
16L/34R
Dimensions
6,200 x 100 ft
Surface
Asphalt (fair)
Edge lights
HIGH
RWY 16L151°T
ILSLOC/GS
Approach lightsMALSR
VGSIPAPI (P4L)
RWY 34R331°T
Approach lightsMALSF
VGSIPAPI (P4L)
Traffic patternRight

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
142 ft
Pressure altitude
-378 ft
Field elevation
192 ft MSL
Temperature
19°C (66°F)
Dewpoint
8°C (46°F)
Altimeter
30.49 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
2218Z 6:18 PM
Sunrise
1130Z 7:30 AM
Loggable night
2245Z (6:45 PM local) → 1103Z (7:03 AM local)
end of evening to start of morning civil twilight
Position lights required
2218Z (6:18 PM local) → 1130Z (7:30 AM local)
sunset to sunrise (91.209)
Night passenger currency
2318Z (7:18 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

Washington Manassas Harry P. Davis Field is in Manassas, Virginia. Field elevation 192 ft MSL. Airport facts are drawn from OurAirports and the FAA NASR dataset.

OPERATIONS & CONTACT
OwnershipPublicly owned
UseOpen to the public
TypeMedium airport
ManagerJUAN RIVERA
Manager phone703-361-1882
AttendedDaily, 0630–2230
CHARTS & AIRSPACE
ICAO / IATAKHEF / MNZ
SectionalWASHINGTON
Center (ARTCC)WASHINGTON
Flight service (AFSS)LEESBURG
RegionVirginia
CountryUnited States
Coordinates38.7230, -77.5154
Distance from city28 NM WSW
SERVICES & LIGHTING
Fuel100LL · Jet A
Control towerTowered
Field lightingSee remarks
BeaconSunset to sunrise · White-green (lighted land airport)
CTAF133.100
FREQUENCIES

Communications

128.525
POTOMAC APP/DEP
A/D
125.175
ATIS
ATIS
120.35
KHWY AWOS-3 (12nm SW)
AWOS
120.2
POTOMAC CLNC DEL
CLD
133.1
CTAF
CTAF
121.8
GND
GND
133.1
TWR
TWR

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

AIRCRAFT ACTIVITY

KHEF traffic patterns

2026-06-12 to 2026-10-23, 70 days observed · data 2026-10-23

High confidence
TRAFFIC VOLUME (30-DAY)
AVG LANDINGS/DAY
63.8
AVG OPS/DAY
103.4
Activity trend over 18 days: rising, from 108 to 151 operations per dayOperations trend (18 days)

Busiest day: Thu · Busiest month: Oct

FLEET MIX
Piston single 64%Unknown 16%Jet 7%Twin 6%Turboprop 5%Helicopter 2%

Mostly small piston aircraft.

TOP AIRCRAFT TYPES
›P28A (Piston single) · ~357 landings/mo
›C172 (Piston single) · ~292 landings/mo
›PA44 (Twin) · ~63 landings/mo
›UNKN (Unknown) · ~43 landings/mo
›PC12 (Turboprop) · ~42 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)
›PA44 (Twin)
›DV20 (Unknown)
›C182 (Piston single)

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.

KIAD Washington Dulles International Airport
14 NM N
VFR
KDAA Davison Army Air Field
16 NM E
VFR
KNYG Quantico Marine Corps Airfield / Turner Field
17 NM SE
UNKNOWN
KRMN Stafford Regional Airport
20 NM S
VFR
KDCA Ronald Reagan Washington National Airport
24 NM E
VFR
KADW Joint Base Andrews
31 NM E
VFR
AIRPORT REMARKS

Operational remarks

›TRML APN FOR TSNT AND US CUST PRKG.
›FOR CD WHEN ATCT IS CLSD CTC POTOMAC APCH AT 866-709-4993.
›US CUSTOMS AVBL MON-SUN 1000-0400Z. CALL COMMAND CENTER 703-661-2800 FOR APNTMT. 24 HR NOTICE RQRD. ALL WKEND FLIGHTS MUST BE ARNGD BFR 1700 LOCAL ON FRI BFR.
›HELICOPTER OPS OVER RESIDENTIAL AREAS BLW 1000 FT SHOULD BE AVOIDED; CTC AMGR 703-361-1882 FOR INFO.
›BIRDS & DEER ON & INVOF ARPT.
›TWY B SAFETY AREA WID 44 FT LATERALLY EAST SIDE FM TWY E TO TWY G.
›TPA - 1200 MSL SINGLE ENGINE & LGT TWIN ACFT; 1500 MSL MED TWIN & TURBOPROP ACFT; 1000 MSL HELICOPTER.
›WHEN ATCT CLSD ACTVT MALSR RWY 16L; MALSF RWY 34R; REILS RWY 16R & 34L; HIRL RWY 16L/34R, MIRL RWY 16R/34L - CTAF.
›ARFF INDEX B SVCS AVBL 0700-1900 DAILY, PPR 48HRS FOR ARFF INDEX C OR STANDBY SVC OUTSIDE OPRG HRS. FEE FOR ADDNL SVC. CALL ARFF AT 703-587-6302.
OFFICIAL LINKS & SOURCES
↗Official METAR on AviationWeather.gov
↗Search NOTAMs (official FAA NOTAM Search)
↗Official airport website
↗Wikipedia
↗KHEF on OurAirports
FREQUENTLY ASKED
Does KHEF have a METAR?
Yes. KHEF has a current METAR observation, decoded into plain English on this page.
Does KHEF have a TAF?
When KHEF 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 KHEF?
KHEF sits at 192 ft MSL, which factors into the density-altitude estimate on this page.
Is this an official preflight weather briefing for KHEF?
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.