Weather Underground midday recap for Saturday, July 06, 2013.
A stalled frontal boundary produced more rain for the Southeast and Eastern Valleys on Saturday, while showers and thunderstorms popped up across the Northern Plains and Upper Midwest. A ridge of high pressure spinning in the Mid-Atlantic Ocean maintained northward flow for the East, which pushed ample moisture and energy in from the Gulf of Mexico. This allowed for heavy rainfall to persist with isolated thunderstorm activity from the panhandle of Florida through the Ohio River Valley. Severe storms have not yet developed by mid-day on Saturday, but heavy rainfall associated with this system allowed for flooding to remain a concern for the East. Valparaiso, Florida reported the heaviest rainfall for the region with a mid-day total of 3.44 inches.
Meanwhile in the North, a trough of low pressure moved off the Northern Rockies and into the Northern Plains early on Saturday. Counter-clockwise flow around this system pushed warm air northward, and created a warm front that extended eastward towards the Great Lakes. This front kicked up scattered showers and thunderstorms across the Dakotas and Minnesota. With a cold front following closely behind, the region had a slight risk of severe thunderstorm development with strong winds and large hail likely, and possibly a tornado or two. However, severe storms have not yet been reported across the region.
Out West, temperatures continued to cool as onshore flow remained strong and high pressure shifted eastward over the Southern Rockies. Some limited monsoonal moisture allowed for a few scattered thunderstorms to develop over the Desert Southwest from southern California through New Mexico.
Temperatures in the Lower 48 states Saturday have ranged from a morning low of 34 degrees at Stanley, Idaho to a midday high of 104 degrees at Glendale, Ariz.
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