An early season arctic cold front combined with an upper-level storm system will result in the possibility of accumulating snow and/or ice on Sunday and Monday in the Texas Panhandle. Some travel disruptions may develop, especially if freezing drizzle is the primary precipitation mode. If snow is the primary precipitation mode there is the possibility of 1 to 4 inches of accumulating snow in the northwestern Texas Panhandle with lower amounts to the south and east. Here are the graphic and discussion from the National Weather Service in Amarillo. A killing freeze by Tuesday morning is expected across the Texas Panhandle and West Texas as temperatures drop well into the 20s.

...THE FIRST SNOWFALL AND POSSIBLE ICING OF THE FALL SEASON IS
EXPECTED SUNDAY THROUGH MONDAY...

...A KILLING FREEZE IS LIKELY LATE SUNDAY NIGHT INTO MONDAY
MORNING...

A strong cold front is forecast to move across the Oklahoma and
Texas Panhandles late Saturday night and early Sunday morning and
will deliver the coldest air so far this fall season. In addition,
an upper level storm system is expected to affect the area
beginning Saturday night and continuing into Monday. The
combination of these two features will likely result in the first
snowfall and possible icing of the fall season for most of the
region.

Snow is forecast to develop across the northwest sections of the
Oklahoma and Texas Panhandles Sunday morning. Meanwhile, the
remainder of the area is likely to see precip expand southeast to
include all of the Oklahoma Panhandle and most of the Texas
Panhandle by Sunday evening but as a drizzle turning over to
freezing drizzle. The wintry precipitation is expected to
diminish on Monday.

Preliminary indications are that one to three inches of snow with
locally higher amounts will be possible across the northwest
Texas and Oklahoma Panhandles. The remainder of the Texas
Panhandle and the eastern Oklahoma Panhandle could see up to five
hundreths accumulation of ice.

In addition, low temperatures both early Monday morning and early
Tuesday morning are forecast to fall well into the 20s across the
Oklahoma Panhandle and nearly all of the Texas Panhandle, resulting
in a hard, killing freeze during these time periods.