KATX WSR-88D VAD Hodograph and Wind Profile

View the latest Velocity Azimuth Display (VAD) wind profile from the KATX WSR-88D NEXRAD weather radar near Seattle, WA. The hodograph plots horizontal wind vectors by height above ground, with color-coded altitude layers and optional METAR surface-wind data.

Latest profile valid .

Request and source metadata
URL CALL:    http://www.twisterdata.com/vad/vad.php?radar=KATX&resolution=high&qc=true&showprofile=true&showmeta=true&showhodo=true&showrings=true&ticmarks=axis&umin=-10&umax=30&vmin=-20&vmax=20&maxheight=12000&dynamicbounds=true&sfcstn=KNUW

RADAR SITE:  KATX - Seattle, WA (SFC ELEV 161 m AMSL)
NIDS SOURCE: https://tgftp.nws.noaa.gov/SL.us008001/DF.of/DC.radar/DS.48vwp/SI.katx/sn.last
NIDS VALID:  2026-08-11 01:22 UTC

SFC STATION: KNUW (METAR)
SFC SOURCE:  https://aviationweather.gov/api/data/metar?ids=KNUW&format=json
SFC VALID:   2026-08-11 00:53 UTC
Decoded surface and VAD profile data

Surface observation

METAR KNUW 110053Z 21011KT 10SM FEW045 SCT230 17/12 A3009 RMK AO2 SLP193 T01720117 $

VAD wind profile

QCHeight AGL (m)Speed (kt)Direction (°)RMS (kt)
OK1011.0210—
OK1446.03082.4
OK2056.03012.3
FAIL35712.02647.8
OK44914.02834.1
FAIL5719.02614.9
FAIL7535.02925.3
FAIL10283.03312.8
FAIL10583.03193.1
FAIL13633.03243.7
FAIL16682.03201.2
FAIL16983.03073.3
FAIL19732.02372.4
FAIL21861.032.6
FAIL22772.0181.8
FAIL27652.042.5
FAIL28873.0281.8
FAIL34361.0661.5
FAIL34972.0542.2
FAIL38013.0242.2
FAIL41062.01252.1
FAIL44112.01392.9
FAIL56304.01382.9
FAIL59352.02102.2

QC keeps a level only where its wind speed exceeds twice its RMS fit error (the operational 2×RMS signal-to-noise test). FAIL rows are retained here for reference but excluded from QC-filtered plotting. A dash means the product reported no RMS for that level (kept, not assessable).

KATX WSR-88D NEXRAD VAD hodograph showing the wind profile by height near Seattle, WA, valid 2026-08-11 01:22 UTC