Through March 14, year-to-date rainfall in Naples, Florida, totaled just 0.91 inch, 23% of normal. By mid-March, the Keetch-Byram Drought Index-a measure of fire danger-topped 650 (on a scale of 0 to 800) in Collier County, Florida, on average, and exceeded 600 in Lee, Hendry, Palm Beach, and Monroe Counties. In contrast, little or no rain fell across southern Florida, where abnormal dryness (D0) and moderate to severe drought (D1 to D2) further expanded. From March 5 to 12, Florida reported a statewide improvement in topsoil moisture rated very short to short, from 61 to 54%, according to the U.S. Across northern Florida and environs, heavy showers and thunderstorms provided some relief from D0 and D1. Farther south, however, there were several changes. There were no changes to the depiction of abnormal dryness (D0) and moderate drought (D1) along and near the middle Atlantic Coast, which received light precipitation and experienced a transition to cooler weather. Worcester, Massachusetts, which had a season-to-date snowfall deficit of 31.4 inches through March 12, received 14.4 inches of snow-and had a peak wind gust to 44 mph-on March 13-14. At the end of the drought-monitoring period, an impressive coastal storm delivered high winds and heavy precipitation from the northern mid-Atlantic into southern New England. The Northeast remained free of drought, with less than 2% coverage of abnormal dryness (D0). In fact, freezes were reported for several days, starting on March 14, as far south as Alabama, Georgia, and Mississippi. Elsewhere, chilly conditions dominated areas from the Pacific Coast to the northern half of the Plains, while record-setting warmth finally ended cross the Deep South. Mostly dry weather covered the remainder of the country, including the central and southern High Plains, the Rio Grande Valley, and southern Florida. Farther north, a powerful coastal storm developed as the monitoring period ended, battering parts of the Northeast with heavy, wet snow and high winds. Notably, northern Florida and environs received much-needed rain, following an extended period of record-setting warmth. Meanwhile, a band of heavy showers (locally 2 to 4 inches) stretched from northeastern Texas to the southern Appalachians, before shifting into the Deep South. Farther east, storms delivered light to moderately heavy snow across the northern Plains and upper Midwest, with some of the most significant precipitation falling on March 11. Most other areas of the West received mostly light to moderately heavy precipitation. The average mid-March water equivalency of the high-elevation Sierra Nevada snowpack topped 55 inches, more than 220% normal for an entire season, according to the California Department of Water Resources. By March 15, the San Joaquin River at Patterson, California, neared a record crest, with the water rising to within less than a foot of the February 2017 high-water mark. Rain, along with melting of lower-elevation snowpack and dam releases, also led to significant water rises along many waterways in California’s Central Valley. Torrential rain in central California caused a levee break along the Pajaro River, flooding the community of Pajaro in Monterey County. Two atmospheric river events struck California and portions of neighboring states, with the second arriving as the drought-monitoring period ended.
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