WxDecoder

CL39 Weather St. Helena Fire Department Heliport

St Helena, CaliforniaElevation 308 ftHeliport
OFF-FIELD REFERENCE
Nearest report: KSTS · 14 NM W · 46 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 · KSTS
WIND
Calm
no steady wind
VISIBILITY
10 SM
16.1 km
CEILING
None
no BKN/OVC layer
ACTIVE NWS ALERTS

Active weather alerts

Coastal Flood AdvisoryMinor · Expected · Likely
25 0949Z to 29 2200Z
San Francisco; North Bay Interior Valleys; San Francisco Bay Shoreline; Northern Monterey Bay; Southern Monterey Bay and Big Sur Coast
* WHAT...Up to 1.9ft of inundation above ground level is possible in low-lying areas near shorelines and tidal waterways. * WHERE...Bay Shoreline locations of San Francisco Bay, Monterey Bay and Big Sur Coast. * WHEN...Until 3 PM PDT Thursday. * IMPACTS...High tides will result in flooding of low-lying infrastructure, isolated road closures, and coastal erosion. Rising tides will bring water an…
If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property.

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 calm, visibility 10 SM, temperature 6C. Treat this as supplemental, not an aviation observation. Forecast suggests sunday partly sunny, high near 73F, low near 44F, 0% chance of precipitation. Key risks: no significant hazards are highlighted right now, but always confirm against an official briefing.

DayConditionsTemp FWindGustsPrecipPilot note
Sunday Partly Sunny 73/44 SSE 2 kt – 0%
Monday Sunny 68/41 W 5 kt – 1%
Tuesday Patchy Fog then Sunny 70/43 NW 2 kt – 0%
Wednesday Patchy Fog then Partly Sunny 68/43 SW 2 kt – 2%
Thursday Patchy Fog then Mostly Sunny 65/40 W 3 kt – 11%
Friday Patchy Fog then Slight Chance Light Rain 62/39 WNW 3 kt – 24%
Saturday Chance Light Rain 62 NNW 2 kt – 25%

Source: National Weather Service (office MTR). Forecast issued 1039Z.

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 CL39. Enter a runway number or heading to estimate wind components.
RUNWAYS

Runway detail & declared distances

1 runway · longest 100 ft

H1
Dimensions
50 x 50 ft
Surface
Asphalt
RWY H1

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
308 ft MSL

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

DAYLIGHT & NIGHT

Sun & logging windows

Sunset
0119Z 6:19 PM
Sunrise
1429Z 7:29 AM
Loggable night
0146Z (6:46 PM local) → 1402Z (7:02 AM local)
end of evening to start of morning civil twilight
Position lights required
0119Z (6:19 PM local) → 1429Z (7:29 AM local)
sunset to sunrise (91.209)
Night passenger currency
0219Z (7:19 PM local) → 1329Z (6:29 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

St. Helena Fire Department Heliport is in St Helena, California. Field elevation 308 ft MSL. Airport facts are drawn from OurAirports and the FAA NASR dataset.

OPERATIONS & CONTACT
OwnershipPublicly owned
UsePrivate use
TypeHeliport
ManagerGEOFF BELYEA
Manager phone707-967-1400
AttendedContinuous (24 hours)
CHARTS & AIRSPACE
ICAO / IATACL39
SectionalSAN FRANCISCO
Center (ARTCC)OAKLAND
Flight service (AFSS)OAKLAND
RegionCalifornia
CountryUnited States
Coordinates38.5485, -122.5110
Distance from city3 NM N
SERVICES & LIGHTING
Control towerNon-towered
AIRCRAFT ACTIVITY

Traffic patterns

Aircraft activity data is not available for this airport yet.

NEARBY AIRPORTS

Weather reference stations

CL39 has no on-field report. Nearest reporting station: KSTS (14 NM W, VFR).

KSTS Charles M. Schulz Sonoma County Airport
14 NM W
VFR
KAPC Napa County Airport
23 NM SE
VFR
KDVO Marin County Airport - Gnoss Field
24 NM S
VFR
KSUU Travis Air Force Base
32 NM SE
VFR
KCCR Buchanan Field
40 NM SE
VFR
KSMF Sacramento International Airport
44 NM E
VFR
AIRPORT REMARKS

Operational remarks

›PROVIDED VFR OPNS, PRIVATE USE AND INGRESS/EGRESS ROUTES DO NOT CONFLICT WITH TPA OF ANY ESTABLISHED PUBLIC-USE LANDING AREAS.
›GEOFF.BELYEA@FIRE.CA.GOV
›FOR CD CTC OAKLAND ARTCC AT 510-745-3380.
›OWNER CONTACT - BARRY BIERMANN - NAPA COUNTY FIRE CHIEF
OFFICIAL LINKS & SOURCES
↗Search NOTAMs (official FAA NOTAM Search)
↗CL39 on OurAirports
FREQUENTLY ASKED
Does CL39 have a METAR?
No on-field METAR is issued for CL39. This page uses the nearest reporting station as a reference.
Does CL39 have a TAF?
No TAF is issued directly for CL39. Use the nearest TAF-issuing field as a planning reference.
What is the field elevation at CL39?
CL39 sits at 308 ft MSL, which factors into the density-altitude estimate on this page.
Is this an official preflight weather briefing for CL39?
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.