#Drought news: Conditions downgraded in the central and northern mountains

Click here to go to the US Drought Monitor website. Here’s an excerpt:

Summary

Over the last week, dry conditions continued in the Desert Southwest and in parts of the Central Rockies, leading to drought persistence and degradation in these areas. Farther east across the Great Plains, scattered thunderstorms led to some areas improving or staying out of drought, while some areas that missed the rain were degraded. In the Upper Midwest and Northern Plains, precipitation patterns also dictated areas which experienced degrading and improving conditions. Near normal or wetter than normal conditions occurred over most of the eastern United States, where few changes to the USDM depiction were made…

South

Warm weather occurred over much of the Southern region; the warmest temperatures (6 or more degrees warmer than normal) took place in the Texas Panhandle, western Oklahoma, and the Dallas-Fort Worth Metroplex. Paltry rain amounts for this week combined with high temperatures and long term precipitation deficits added additional stress to the water systems in parts of the Texas Panhandle, leading to the expansion of extreme and exceptional drought conditions. Moderate to heavy rain over the Interstate 35 corridor in Oklahoma and in north-central to west Texas allowed for 1-category improvements in some areas that were experiencing abnormal dryness, moderate drought, severe drought, and extreme drought. Meanwhile, continued dry and hot conditions led to the introduction of extreme drought west of Lubbock and in areas near Corpus Christi where soil moisture deficits and mid to long term precipitation deficits supported degradation. Additionally, extreme drought was expanded in the Del Rio area northeast of the Rio Grande and in a corridor north of Houston and College Station in response to building precipitation deficits in these areas. The drought impact designation in far south Texas was changed from S to SL, indicating that drought conditions are present at both short and long term timescales. Elsewhere in the South, a few areas of abnormal dryness and moderate drought formed or expanded in Louisiana, Mississippi, Arkansas, and eastern Oklahoma that missed out on the moderate to heavy rains in the region…

High Plains

Significant rainfall fell in parts of the High Plains region, while most of the mountainous areas remained dry. Thunderstorms in northeast Colorado, Nebraska, and northwest and eastern Kansas delivered between 0.5 and 3 inches of rain, helping to prevent additional drying caused by the high temperatures. Similar rainfall totals in southwest Kansas were enough to lessen precipitation deficits and result in an improvement from extreme to severe drought. Aside from the Black Hills, much of the Dakotas saw rainfall amounts over a half inch, with some areas exceeding 2 inches. This rainfall led to the removal of abnormal dryness in some areas west of the Missouri River in South Dakota and far southern North Dakota. Recent rainfall also helped decrease moderate drought in northwest South Dakota, though if recent hot weather and a high atmospheric demand for moisture continues, a reversion back to moderate drought conditions may occur. Severe drought was reduced in coverage in north-central North Dakota, where precipitation deficits over multiple time scales had decreased sufficiently for an improvement. Meanwhile, over the central Rockies, continued warm, dry weather exacerbated longer term precipitation deficits leading to an expansion of drought and abnormal dryness in north-central Colorado and south-central Wyoming…

West

During the past week, precipitation fell in the mountainous areas of western Washington and Oregon, northern and central Idaho, and parts of western Montana. The highest amounts, with isolated spots in the 2 to 3 inch range, fell in western Washington, western Oregon, southwest Montana, and the southern Idaho Panhandle. Precipitation, some heavier, also fell over the high plains of Montana. Elsewhere across the region, conditions were quite dry, aside from some isolated precipitation south of Tucson. In the drier areas of central Washington and north-central Oregon, abnormal dryness developed as 1 to 2 month precipitation deficits increased. Severe drought crept south in southwest and south-central New Mexico due to increasing short- and medium-term precipitation. Relatively cool conditions occurred in most of central and northern California and in much Oregon and Washington, while above normal temperatures were found in eastern Montana, parts of Idaho, Utah, most of Nevada, and Arizona. The warmest areas, primarily in New Mexico and Utah, had temperatures reach at least 6 degrees above normal for the weekly average, while the coolest areas saw mercury drop 4 to 8 degrees below normal…

Looking Ahead

The National Weather Service medium range forecast calls for two significant areas of wet weather over the next 7 days (June 13 to June 20). Widespread and potentially heavy rainfall is expected to bring 2 to 5 inches of rain to coastal and central Texas and southern Louisiana. Rainfall may also extend into the Southern Plains and the remainder of the Gulf Coast region.

Farther north, showers and thunderstorms are likely from the Northern Rockies to the High Plains and Upper Great Lakes. Rainfall over the northern tier is likely to be locally heavy (3 to 5 inches) creating the potential for isolated flooding. In contrast, dry weather is expected to prevail over the Pacific Coast and the drought inflicted areas of southern California, southern Nevada, and western Utah.

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