NATURAL GAS: ( weather) A frigid Arctic blast will continue to impact much of the eastern ½ of the US through Saturday w/rain, snow, and highs of -0s to 40s, lows of -20s to 30s for very strong national demand. The warmer exception will be the West and far southern and western US w/highs of 50s to 70s. Warmer temperatures will gain ground over much of the US late this weekend into early next week w/highs of 40s-70s. Overall, VERY HIGH national demand through Saturday, then light Sunday through early next week.