WxDecoder

KS40 Weather Prosser Airport

Prosser, WashingtonElevation 697 ftSmall airport
OFF-FIELD REFERENCE
Nearest report: KRLD · 21 NM E · 8 min old
Ceiling 9,000 ft, visibility 10 SM.
No on-field report, so no field flight category. Conditions at the field may differ.
OFF-FIELD REFERENCE · KRLD
WIND
200@8
steady
VISIBILITY
10 SM
16.1 km
CEILING
9,000 ft
lowest BKN/OVC
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 20° at 4 kt, visibility 10 SM, temperature 5.1C. Treat this as supplemental, not an aviation observation. Forecast suggests tonight areas of fog, low near 37F, 17% chance of precipitation. Key risks: no significant hazards are highlighted right now, but always confirm against an official briefing.

DayConditionsTemp FWindGustsPrecipPilot note
Tonight Areas Of Fog 37 E 1 kt – 17%
Tuesday Areas Of Fog then Partly Sunny 61/36 W 6 kt – 17%
Wednesday Slight Chance Rain Showers then Partly Sunny 57/32 SW 10 kt 18 kt 19%
Thursday Mostly Sunny 53/31 NE 2 kt – 32%
Friday Partly Sunny 53/28 N 1 kt – 5%
Saturday Partly Sunny 51/28 N 1 kt – 11%
Sunday Mostly Sunny 52/27 N 1 kt – 5%
Monday Mostly Sunny 52 N 1 kt – 2%

Source: National Weather Service (office PDT). Forecast issued 0503Z.

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
NESW0826
WIND
No on-field weather data
No reporting weather station on the field, so wind components cannot be computed. See nearby stations below.
RUNWAYS

Runway detail & declared distances

1 runway · longest 3,450 ft

08/26
Dimensions
3,452 x 61 ft
Surface
Asphalt (excellent)
Edge lights
MED
RWY 0890°T
REILYes
Traffic patternLeft
RWY 26270°T
REILYes
Traffic patternRight

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
697 ft MSL

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

DAYLIGHT & NIGHT

Sun & logging windows

Sunset
0054Z 5:54 PM
Sunrise
1432Z 7:32 AM
Loggable night
0125Z (6:25 PM local) → 1401Z (7:01 AM local)
end of evening to start of morning civil twilight
Position lights required
0054Z (5:54 PM local) → 1432Z (7:32 AM local)
sunset to sunrise (91.209)
Night passenger currency
0154Z (6:54 PM local) → 1332Z (6:32 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

Prosser Airport is in Prosser, Washington. Field elevation 697 ft MSL. Airport facts are drawn from OurAirports and the FAA NASR dataset.

OPERATIONS & CONTACT
OwnershipPublicly owned
UseOpen to the public
TypeSmall airport
ManagerQUENTIN WRIGHT
Manager phone509-975-6352
AttendedUNATNDD
CHARTS & AIRSPACE
ICAO / IATAKS40
SectionalSEATTLE
Center (ARTCC)SEATTLE
Flight service (AFSS)SEATTLE
RegionWashington
CountryUnited States
Coordinates46.2134, -119.7910
Distance from city1 NM NW
SERVICES & LIGHTING
Fuel100LL
Control towerNon-towered
Field lightingSee remarks
BeaconSunset to sunrise · White-green (lighted land airport)
Traffic pattern alt800 ft MSL
CTAF122.800
UNICOM122.800
FREQUENCIES

Communications

122.5
SEATTLE
RDO
122.8
CTAF/UNICOM
UNIC
122.800
CTAF
CTAF
122.800
UNICOM
UNICOM

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

AIRCRAFT ACTIVITY

KS40 traffic patterns

2026-07-25 to 2026-09-26, 2 days observed · data 2026-10-25

Low confidence
TRAFFIC VOLUME (30-DAY)
AVG LANDINGS/DAY
2
AVG OPS/DAY
3
Operations trend (1 days)

Busiest day: Sat · Busiest month: Sep

FLEET MIX
Piston single 67%Helicopter 33%

Mostly small piston aircraft.

TOP AIRCRAFT TYPES
›C182 (Piston single) · ~1 landings/mo
›R44 (Helicopter) · ~1 landings/mo
›RV4 (Piston single) · ~1 landings/mo
LIKELY BASED AIRCRAFT
Low-confidence estimate

Aircraft likely based near this airport (estimate), mostly rotorcraft.

›R44 (Helicopter)

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

KS40 has no on-field report. Nearest reporting station: KRLD (21 NM E, VFR).

KRLD Richland Airport
21 NM E
VFR
KPSC Tri Cities Airport
28 NM E
VFR
KHRI Hermiston Municipal Airport
32 NM SE
VFR
KYKM Yakima Air Terminal McAllister Field
38 NM NW
VFR
KPDT Eastern Oregon Regional Airport at Pendleton
50 NM SE
VFR
KELN Bowers Field
58 NM NW
VFR
AIRPORT REMARKS

Operational remarks

›UNICOM 122.8 0900-1700 ONLY.
›PILOTS BRING OWN ROPES.
›AIRFIELD CONDS UNMON.
›FOR CD CTC SPOKANE APCH AT 509-742-2525, WHEN APCH CLSD CTC SEATTLE ARTCC AT 253-351-3694.
›ESTABD PRIOR TO 15 MAY 1959.
›TWYS MKD FOR NGT OPNS WITH RETRO-REFLECTIVE DEVICES.
›ACTVT REIL RWYS 08 & 26; MIRL RWY 08/26 - CTAF.
OFFICIAL LINKS & SOURCES
↗Search NOTAMs (official FAA NOTAM Search)
↗KS40 on OurAirports
FREQUENTLY ASKED
Does KS40 have a METAR?
No on-field METAR is issued for KS40. This page uses the nearest reporting station as a reference.
Does KS40 have a TAF?
No TAF is issued directly for KS40. Use the nearest TAF-issuing field as a planning reference.
What is the field elevation at KS40?
KS40 sits at 697 ft MSL, which factors into the density-altitude estimate on this page.
Is this an official preflight weather briefing for KS40?
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.