I haven't seen this befo

DZE04B20E34RAB04E20B49UPB47E49


Try the "translated" option on adds.aviationweather.noaa.gov

Appears to be a secret code also on that. Here's the translation,
which doesn't include that neat bit above:

METAR text: KAUS 182153Z 01014KT 4SM -RA BR OVC009 02/01 A3012 RMK
AO2 DZE04B20E34RAB04E20B49UPB47E49 SLP206 P0002 T00220011
Conditions at: KAUS (AUSTIN, TX, US) observed 2153 UTC 18 January
2008
Temperatu 2.2°C (36°F)
Dewpoint: 1.1°C (34°F) [RH = 92%]
Pressure (altimeter): 30.12 inches Hg (1020.1 mb)
[Sea-level pressu 1020.6 mb]
Winds: from the N (10 degrees) at 16 MPH (14 knots; 7.3 m/s)
Visibility: 4 miles (6 km)
Ceiling: 900 feet AGL
Clouds: overcast cloud deck at 900 feet AGL
Weather: -RA BR (light rain, mist)