Actually, the PRO-94 has Limited SAME (LAME...my acronym, not official). It does not allow you to enter the FIPS county code, but does decode and vary its alert based on the level of alert received (Test, Statement, Watch, Warning...). The PRO-96 has SAME and lets you input a FIPS, but otherwise has similar capabilities as the PRO-94.
To use LAME, you must put the scanner in the SAME Alert mode. In this mode, the scanner sits on the WX channel with the audio muted until an alert occurs. It will not activate on a SAME header while scanning.
The SAME part of the WX alert is a short data burst (as short as 1 second) repeated 3 times. In order to ensure that the scanner actually hears an entire SAME message, the scanner must continuously monitor the WX channel. To do this while scanning would require the scanner to have two independant receivers. The PRO-94 does not.
I cannot find in the O/M that the PRO-94 has WX priority (but it makes sense, and I tend to recall that it does). In this mode, the scanner scans or monitors as usual, but checks the WX channel every few seconds (typically 5 seconds) for the presence of a 1050 Hz tone. This tone is transmitted after the SAME data, typically for about 10 seconds. The scanner really only needs to check for this tone every 8 seconds or so. If the tone is present, then the scanner alerts you and switches to the WX transmission. However, it cannot tell you the alert level, as this information was sent prior to the 1050 Hz tone and is not repeated after the tone.