Atlantic

Weather Underground midday recap for Tuesday, September 07, 2010.

Topical Storm Hermine made landfall on the coast of northeast Mexico late Monday night with heavy rainfall and sustained tropical storm force to near hurricane force winds and gusts. The highest wind reported in the United States was 55 mph with a gust to 65 to 70 mph at Valley International Airport in Harlingen, Texas early Tuesday morning. Since landfall, Hermine had begun weakening and moved northward through the Rio Grande Valley Tuesday morning. Moderate to heavy rainfall fell across Texas. Rainfall accumulations had reached 4 to 8 inches.

Farther north, a large low pressure system over the Upper Midwest moved eastward into the Great Lakes region Tuesday, with its cold front extended across the Ohio Valley and Mississippi Valley. The main threat for this system was the heavy rain band along the southern portion of the cod front that cut across southern Missouri, northern Arkansas and eastern Oklahoma. Otherwise, mainly scattered showers and isolated thunderstorms developed near the center of the low pressure from Minnesota to the Upper Peninsula of Michigan and along the northern portion of the front.

Elsewhere, a weak front that moved ashore late Monday night and early Tuesday, produced light to moderate rain over parts of the Northwest. In addition, a weak stationary front in the Southwest supported scattered showers and isolated thunderstorms in southern Nevada, northern Arizona and southern Utah. In the Southeast, numerous moderate to heavy showers and thunderstorms continued to affect most of the Florida Peninsula Tuesday, especially across the interior and western part of the peninsula.

Temperatures in the Lower 48 states Tuesday have ranged from a morning low of 21 degrees at Stanley, Idaho to a midday high of 102 degrees at Williams Gateway Airport, Ariz.