July natural gas prices rallied to their highest level since May 29th in early morning action but have since turned negative. Some traders suggested that the market could be susceptible to a set back after nearly 23% rally from last Thursday's low to the overnight high. The 6 to 10 day and 8 to 14 day weather maps show below normal temps in the northeast but above normal temperatures in the Midwest are a force worthy of supporting air-conditioning demand for natural gas.