Observations (every 15 minutes) at road weather stations across Germany measure various meteorological parameters as for example temperature, precipation etc..
relative humidity measurements at DWD stations in the Regional Basic Synoptic Network of the WMO, plus additional stations from the so called "Global Dataset" of DWD
---- The bulletin collects TEXT reports. ---- The WOLV30 TTAAii Data Designators decode (2) as: T1 (W): Warnings. T2 (O): Other. A1A2 (LV): Latvia. (2: Refer to WMO No.386 - Manual on the GTS - Attachment II.5) ---- WMO No.9 - Volume C1 'Remarks' field: IRREGULAR