WxDecoder

US-1323 Weather Ascension Seton Williamson Heliport

Round Rock, TexasElevation 815 ftHeliport
OFF-FIELD REFERENCE
Nearest report: KAUS · 22 NM S · 58 min old
Ceiling 15,000 ft, visibility 10 SM.
No on-field report, so no field flight category. Conditions at the field may differ.
OFF-FIELD REFERENCE · KAUS
WIND
130@8
steady
VISIBILITY
10 SM
16.1 km
CEILING
15,000 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 140° at 5 kt, visibility 10 SM, temperature 24C. Treat this as supplemental, not an aviation observation. Forecast suggests this afternoon partly sunny, high near 82F, low near 61F, 2% chance of precipitation. Key risks: thunderstorms in the forecast.

PILOT WEATHER NOTES
Thunderstorms in the forecastWeather.gov
Saturday: Slight Chance Showers And Thunderstorms. Watch for developing convection and plan alternates.
DayConditionsTemp FWindGustsPrecipPilot note
This Afternoon Partly Sunny 82/61 SE 4 kt – 2%
Tuesday Partly Sunny 82/62 SE 9 kt – 5%
Wednesday Partly Sunny 83/64 SE 9 kt – 13%
Thursday Mostly Cloudy then Chance Rain Showers 80/62 SE 9 kt – 29%
Friday Chance Rain Showers 76/61 ESE 9 kt 22 kt 52%
Saturday Slight Chance Showers And Thunderstorms 81/63 S 4 kt – 20% Thunderstorms in the forecast
Sunday Partly Sunny 85/66 SSE 4 kt – 5%

Source: National Weather Service (office EWX). Forecast issued 1851Z.

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-1323. Enter a runway number or heading to estimate wind components.
RUNWAYS

Runway detail & declared distances

1 runway

H1
Dimensions
40 x 40 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
815 ft MSL

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

DAYLIGHT & NIGHT

Sun & logging windows

Sunset
2348Z 6:48 PM
Sunrise
1241Z 7:41 AM
Loggable night
0012Z (7:12 PM local) → 1216Z (7:16 AM local)
end of evening to start of morning civil twilight
Position lights required
2348Z (6:48 PM local) → 1241Z (7:41 AM local)
sunset to sunrise (91.209)
Night passenger currency
0048Z (7:48 PM local) → 1141Z (6:41 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

Ascension Seton Williamson Heliport is in Round Rock, Texas. Field elevation 815 ft MSL. Airport facts are drawn from OurAirports and the FAA NASR dataset.

OPERATIONS & CONTACT
OwnershipPrivately owned
UsePrivate use
TypeHeliport
ManagerFRANK URIAS
Manager phone512-785-3604
AttendedUNATNDD
CHARTS & AIRSPACE
ICAO / IATAUS-1323
SectionalSAN ANTONIO
Center (ARTCC)HOUSTON
Flight service (AFSS)SAN ANGELO
RegionTexas
CountryUnited States
Coordinates30.5661, -97.6521
Distance from city3 NM NE
SERVICES & LIGHTING
Control towerNon-towered
CTAF122.900
FREQUENCIES

Communications

122.900
CTAF
CTAF

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

AIRCRAFT ACTIVITY

US-1323 traffic patterns

2026-07-03 to 2026-10-23, 15 days observed · data 2026-10-25

Low confidence
TRAFFIC VOLUME (30-DAY)
AVG LANDINGS/DAY
1.2
AVG OPS/DAY
1.4
Activity trend over 5 days: falling, from 2 to 1 operations per dayOperations trend (5 days)

Busiest day: Tue · Busiest month: Sep

FLEET MIX
Helicopter 68%Unknown 16%Piston single 16%

Mostly rotorcraft.

TOP AIRCRAFT TYPES
›B06 (Helicopter) · ~2 landings/mo
›B407 (Helicopter) · ~2 landings/mo
›A169 (Helicopter) · ~1 landings/mo
›ACAM (Unknown) · ~1 landings/mo
›C172 (Piston single) · ~1 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-1323 has no on-field report. Nearest reporting station: KAUS (22 NM S, VFR).

KAUS Austin Bergstrom International Airport
22 NM S
VFR
KILE Skylark Field
31 NM N
UNKNOWN
KGRK Killeen Regional Airport / Robert Gray Army Airfield
31 NM N
VFR
KHLR Hood Army Air Field
35 NM N
VFR
KTPL Draughon Miller Central Texas Regional Airport
37 NM N
VFR
KBAZ New Braunfels National Airport
56 NM S
VFR
AIRPORT REMARKS

Operational remarks

›FURIAS@ASCENSION.ORG AND TREVORBLACK@ASCENSION.ORG
OFFICIAL LINKS & SOURCES
↗Search NOTAMs (official FAA NOTAM Search)
↗US-1323 on OurAirports
FREQUENTLY ASKED
Does US-1323 have a METAR?
No on-field METAR is issued for US-1323. This page uses the nearest reporting station as a reference.
Does US-1323 have a TAF?
No TAF is issued directly for US-1323. Use the nearest TAF-issuing field as a planning reference.
What is the field elevation at US-1323?
US-1323 sits at 815 ft MSL, which factors into the density-altitude estimate on this page.
Is this an official preflight weather briefing for US-1323?
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.