#Drought news: #Snowpack conditions well below normal in the mountains of #AZ, western #Colorado, eastern #NV, #NM, and #OR

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

Summary

This U.S. Drought Monitor week saw a series of storms impact the Pacific Northwest, northern California, and northern Rockies. The heaviest precipitation was observed across the Olympic Mountains and North Cascades of western Washington where precipitation accumulations (liquid) ranged from 4-to-12 inches. In the Puget Lowlands of western Washington, runoff from the storm event led to severe flooding on the Skagit River that peaked at 5 feet above flood stage on Friday. Elsewhere in the West, unseasonably warm temperatures were observed across parts of the region including record-breaking high temperatures reported across southern California, the Desert Southwest, western Great Basin, and along the Front Range of Colorado. In the Southwest, the warm and dry pattern of the past several months led to expansion of areas of moderate drought in Arizona, New Mexico, and Utah while drought-related conditions improved in western Montana. In the High Plains, conditions were very dry this week, and temperatures were well above normal across the entire region. In the South and Southern Plains, the overall dry pattern during the past 30-to-60 days led to expansion of areas of moderate-to-severe drought across portions of Arkansas, Louisiana, Mississippi, eastern Oklahoma, and eastern Texas. In the Mid-Atlantic states, short-term precipitation deficits during the past 30 days led to deterioration of conditions across portions of North Carolina and Virginia…

High Plains

On this week’s map, conditions deteriorated in central and eastern Kansas as well as in western North Dakota. In North Dakota, areas of Moderate Drought (D1) and Severe Drought (D2) expanded in response to below normal precipitation during the past 30-to-60 days as well as reports of signs of negative impacts to the winter wheat crop. According to the USDA World Agricultural Outlook Board, winter wheat conditions are currently rated as 38% poor to very poor for South Dakota. In Kansas, scattered below normal streamflows and below normal precipitation during the past 30 days led to expansion of areas of Moderate Drought (D1) in south-central. During the past week, the region was dry and temperatures were well above average especially in western portions of the Dakotas where temperatures were 15-to-18 degrees above normal…

West

During the past week, the warm and dry pattern continued across the Southwest, southern Rockies, and eastern portions of the Intermountain West while northern California, western Oregon and Washington, and the northern Rockies were impacted by several storms that delivered locally heavy rainfall and mountain snow to the higher elevations. According to the Natural Resources Conservation Service SNOTEL network, snowpack conditions are above normal in the following areas: Cascades (Washington), Sawtooth Range (Idaho), northern Rockies (Montana/Wyoming), and portions of the central Sierra (California). Conversely, snowpack conditions were well below normal in the mountain ranges of the Arizona, western Colorado, eastern Nevada, New Mexico, and Oregon. On the map, areas of Moderate Drought (D1) expanded in central and northern Arizona, western Colorado, western New Mexico, and across Utah in response to short-term precipitation deficits (30-60 days), poor snowpack conditions, and anomalously warm temperatures. According to the USDA, California’s topsoil moisture is currently rated as 75% short to very short. During the past week, average temperatures were well above normal (5-to-18 degrees) across the region with numerous daily high temperature records broken from California to Colorado…

Looking Ahead

The NWS WPC 7-Day Quantitative Precipitation Forecast (QPF) calls for liquid precipitation accumulations of 2-to-5 inches in western Washington and 1-to-2 inches across the Northern Rockies of Idaho and Montana. Accumulations of 0.5-to-1 are forecast for the central and southern Rockies. Accumulations of an inch are expected in the lower Midwest and northern portions of the South. The CPC 6–10-day outlook calls for a high probability of above-normal temperatures across the eastern half of the conterminous U.S. as well as in western Arizona, California, and western Nevada while below normal temperatures are expected in a swath extending from west Texas to eastern portions of the Pacific Northwest. In terms of precipitation, below normal precipitation is expected across the western third of the conterminous U.S. while a high probability of above normal precipitation is forecast for the eastern third of the U.S. and eastern portions of the Desert Southwest.

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