ENGM ATIS gives you the information about which Ice warning message is valid at given time. You can find detailed information in FIC NOTAM.
For example:
ENSV ICE MESSAGE B03 VALID 141100/141500 ENVV-
ENOR NORWAY FIR LCA MOD ICE FCST BTN N6000 AND N6200 AND W OF E00730
BLW FL150. 0-ISOTHERM: FL050-FL060. WKN.
https://www.ippc.no/ippc/aisaerodrom...teria&FIR=ENOR