WxDecoder

US-8138 Weather San Dimas Dam Emergency Heliport

La Verne, CaliforniaElevation 1,477 ftHeliport
OFF-FIELD REFERENCE
Nearest report: KPOC · 4 NM S · More than 1 hour old
No ceiling, visibility 10 SM.
No on-field report, so no field flight category. Conditions at the field may differ.
OFF-FIELD REFERENCE · KPOC
WIND
250@12
steady
VISIBILITY
10 SM
16.1 km
CEILING
None
no BKN/OVC layer
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 341° at 2 kt. This observation is older than usual, so treat it with extra caution. Treat this as supplemental, not an aviation observation. Forecast suggests tonight mostly clear, low near 55F, 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 55 WNW 4 kt – 0%
Monday Sunny 80/55 W 9 kt – 0%
Tuesday Sunny 79/55 SW 4 kt – 0%
Wednesday Mostly Sunny 77/56 SE 4 kt – 1%
Thursday Mostly Cloudy 69/55 SSE 4 kt – 14%
Friday Slight Chance Rain Showers 66/53 SSW 4 kt – 19%
Saturday Slight Chance Rain Showers 64/52 SSE 4 kt – 68%
Sunday Rain Showers Likely 61 S 4 kt – 68%

Source: National Weather Service (office LOX). Forecast issued 0258Z.

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 US-8138. Enter a runway number or heading to estimate wind components.
RUNWAYS

Runway detail & declared distances

1 runway · longest 36 ft

H1
Dimensions
36 x 36 ft
Surface
Concrete (good)
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
1,477 ft MSL

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

DAYLIGHT & NIGHT

Sun & logging windows

Sunset
0105Z 6:05 PM
Sunrise
1405Z 7:05 AM
Loggable night
0130Z (6:30 PM local) → 1339Z (6:39 AM local)
end of evening to start of morning civil twilight
Position lights required
0105Z (6:05 PM local) → 1405Z (7:05 AM local)
sunset to sunrise (91.209)
Night passenger currency
0205Z (7:05 PM local) → 1305Z (6:05 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

San Dimas Dam Emergency Heliport is in La Verne, California. Field elevation 1,477 ft MSL. Airport facts are drawn from OurAirports and the FAA NASR dataset.

OPERATIONS & CONTACT
OwnershipPublicly owned
UsePrivate use
TypeHeliport
ManagerBENNY VELASCO
Manager phone909-593-4955
AttendedUNATNDD
CHARTS & AIRSPACE
ICAO / IATAUS-8138
SectionalLOS ANGELES
Center (ARTCC)LOS ANGELES
Flight service (AFSS)RIVERSIDE
RegionCalifornia
CountryUnited States
Coordinates34.1541, -117.7713
Distance from city3 NM NNW
SERVICES & LIGHTING
Control towerNon-towered
AIRCRAFT ACTIVITY

US-8138 traffic patterns

2026-09-01 to 2026-09-01, 1 days observed · data 2026-10-23

Insufficient confidence
TRAFFIC VOLUME (30-DAY)
AVG LANDINGS/DAY
0
AVG OPS/DAY
1
Operations trend (1 days)

Busiest day: Tue · Busiest month: Sep

FLEET MIX

Mostly small piston aircraft.

TOP AIRCRAFT TYPES
›P28A (Piston single) · ~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

US-8138 has no on-field report. Nearest reporting station: KPOC (4 NM S, VFR).

KPOC Brackett Field
4 NM S
VFR
KCCB Upland-Cable Airport
5 NM SE
VFR
KONT Ontario International Airport
10 NM SE
VFR
KCNO Chino Airport
13 NM SE
VFR
KEMT San Gabriel Valley Airport
14 NM W
VFR
KFUL Fullerton Municipal Airport
20 NM SW
VFR
AIRPORT REMARKS

Operational remarks

›SEE AIRSPACE CASE NO. 2023-AWP-2190-NRA.
›OWNER CTC: SCOTT GREGOWSKI (SGREGOWSKI@DPW.LACOUNTY.GOV)
›CAUTION - POLES AND PLINES BNTH FLIGHPATH.
›CAUTION - HIGHER CANYON TRRN TO NORTH, EAST, AND WEST.
›EMAIL: BVELASCO@DPW.LACOUNTY.GOV
›MAX GW 7000 LBS.
OFFICIAL LINKS & SOURCES
↗Search NOTAMs (official FAA NOTAM Search)
↗US-8138 on OurAirports
FREQUENTLY ASKED
Does US-8138 have a METAR?
No on-field METAR is issued for US-8138. This page uses the nearest reporting station as a reference.
Does US-8138 have a TAF?
No TAF is issued directly for US-8138. Use the nearest TAF-issuing field as a planning reference.
What is the field elevation at US-8138?
US-8138 sits at 1,477 ft MSL, which factors into the density-altitude estimate on this page.
Is this an official preflight weather briefing for US-8138?
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.