Weather Underground Forecast for Friday, July 27, 2012.
The Eastern US will see more showers and thunderstorms on Friday, as a frontal boundary lingers over the region. A low pressure system moves eastward and away from the Northeastern US, but continues pushing a cold front southeastward throughout the day. The system will move from the Ohio River Valley and Mid-Mississippi River Valley into the Southeast stretching from the Mid-Atlantic states into the Lower Mississippi River Valley. Additional moisture and energy from the Gulf of Mexico will feed into this system, allowing for widespread showers and thunderstorms to develop. There is a slight chance of severe thunderstorm development in these areas with damaging winds and large hail likely. These storms are not expected to be as severe as the heavy rain and thunderstorms that developed across the Northeast on Thursday.
In the West, monsoonal moisture lingers over the Southern and Central Rockies, kicking up more widespread showers and thunderstorms. In the Northern Plains, an area of low pressure will develop over the Intermountain West and move through the Northern Rockies. This will kick up scattered storms throughout the day. Severe thunderstorm development is not anticipated for the Western US. Meanwhile, the rest of the West Coast remains under high pressure with sunny, dry, and warm conditions. Temperatures in the Lower 48 states Thursday have ranged from a morning low of 33 degrees at West Yellowstone, Mont. to a high of 105 degrees at Needles, Calif.