Weather Summary: A stalled frontal across the Gulf Coast and series of Pacific storm systems produced unseasonably heavy rains in the Southeast and Northwest while dry and warm weather in the Nation’s midsection accelerated drought conditions from Colorado to Indiana. In the Northwest, more than 2 inches of precipitation fell on the Cascades and northern Rockies as temperatures averaged up to 10 degrees F below normal. In the Southeast, a stalled front along the Gulf produced incredible amounts of rain and severe localized flooding in extreme southern sections of Mississippi and Alabama and the western Florida Panhandle. There were several 24-hour totals of between 8 and 15 inches of rain, with up to 21.7 inches on June 9-10 in extreme western Florida Panhandle as reported via CoCoRAHs - a national cooperative precipitation network. The heavy rains gradually crept north and eastward into southern Alabama, Florida, most of Georgia, South Carolina, western North Carolina, and southwestern Virginia. A cold front edging eastward in the Nation's midsection generated severe thunderstorms in parts of the northern and central High Plains (northern Colorado, southeast Wyoming, western Dakotas), as well as a squall line that swept across Missouri and the Tennessee and lower Mississippi Valleys. Southern Oklahoma and northeastern Texas also received additional rains (2 to 4 inches) early in the week. Unfortunately, dry weather continued in the Southwest, central Plains, and parts of the Midwest, with only light amounts in the Northeast. Temperatures averaged slightly below normal in the East and Southeast, well below normal in the West, and above normal in the middle third of the U.S., especially from northern New Mexico northeastward into Minnesota. Dry weather also occurred in Hawaii, Puerto Rico, and northern Alaska, with unsettled weather across the rest of the latter state.
The East: After last week's wet weather along the entire Atlantic Seaboard (Florida to Maine), rainfall diminished from North Carolina to Maine, but dramatically increased across Florida, Georgia, South Carolina, western North Carolina, and southwestern Virginia. The combination of tropical Gulf moisture and a stalled front with waves of low pressure along it produced widespread showers and thunderstorms that dumped heavy to copious amounts of rain along the central and eastern Gulf and southern Atlantic Coasts, generating severe flash flooding. Up to 21.7 inches of rain fell within 24-hours (ending 7am EDT June 10) in southern Escambia County, FL (extreme western Panhandle), according to a CoCoRAHs cooperative observer, with other nearby spotters reporting 13-15 inches. Around 10 inches fell a day earlier in southern Mississippi (Mobile County), with yet another 5 inches falling 2 days later (ending at 7am EDT June 11). In Florida, moderate to heavy rains soaked much of the state during the week, with the greatest totals (4 to 10 inches) falling on the state's D2-D3 areas. Both Georgia and South Carolina received decent rains early and late in the week, with more than 4 inches falling on the southern and eastern third of the state, and 2 to 4 inches elsewhere. Two to three inches was also measured farther north into western North Carolina and southwestern Virginia, drought-less areas that had been drying out recently. And from eastern North Carolina northward to Maine (areas that had seen a 1-category improvement last week), mostly light rain (0.1 to 0.5 inches) fell, with some northern Pennsylvania, southern New York, and New England locales observing 0.5 to 1 inch. Conditions were kept status-quo here.