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  • Simulating Environmental Conditions for Southwest United States Convective Dust Storms Using the Weather Research and Forecasting Model v4.1

    Abstract: Dust aerosols can pose a significant detriment to public health, transportation, and tactical operations through reductions in air quality and visibility. Thus, accurate model forecasts of dust emission and transport are essential to decision makers. While a large number of studies have advanced the understanding and predictability of dust storms, the majority of existing literature considers dust production and forcing conditions of the underlying meteorology independently of each other. Our study works towards filling this research gap by inventorying dust-event case studies forced by convective activity in the Desert Southwest United States, simulating select representative case studies using several configurations of the Weather Research and Forecasting (WRF) model, testing the sensitivity of forecasts to essential model parameters, and assessing overall forecast skill using variables essential to dust production and transport. We found our control configuration captured the initiation, evolution, and storm structure of a variety of convective features admirably well. Peak wind speeds were well represented, but we found that simulated events arrived up to 2 hours earlier or later than observed. Our results show that convective storms are highly sensitive to initialization time and initial conditions that can preemptively dry the atmosphere and suppress the growth of convective storms.
  • 22-001 Little Goose Dam closes public dam crossing due to inclement weather

    Starbuck, Wash. – Officials at Little Goose Lock and Dam are closing dam crossings to the public on Monday, January 3 through Thursday, January 6 due to inclement weather.
  • Louisville District responds to Kentucky tornado disaster

    The U.S. Army Corps of Engineers Louisville District is working in partnership with local, state and federal agencies in response to the severe storms and tornadoes, which impacted western Kentucky the evening of Dec. 10, 2021. When disasters occur, USACE works under the direction of the Federal Emergency Management Agency to support state and local governments in responding to major disasters.
  • 21-062 Dent Acres Campground and boat ramp closed due to road slide

    AHSAHKA, Idaho. – Dworshak staff have closed Dent Acres recreation area, which includes the Dent Acres Campground and boat ramp, to the public until further notice due to a road slide.
  • USACE North Atlantic Division Prepares for Tropical Depression Ida

    The U.S. Army Corps of Engineers North Atlantic Division is preparing for potential adverse weather impacts to the Northeast caused by Tropical Depression Ida.
  • Drought, lack of measurable rain drains Willamette Valley reservoirs - Corps hosts info session

    Nearly 50 days without measurable rain, combined with hot, dry conditions, has made reservoir levels in the Willamette Valley the lowest in six years. Additionally, forecasts are not predicting enough precipitation to alleviate the ongoing drought in the Pacific Northwest. To help the public understand the conditions, the U.S. Army Corps of Engineers, Portland District will host an info session Thursday, Aug. 5th from 12-1 p.m. to update the public about lake levels and recreation opportunities in its 13 Willamette Valley reservoirs.
  • Rogue River Basin seeing poor water year - Corps holds virtual meeting

    Southern Oregon and the Rogue River Basin are experiencing another dry spring as the U.S. Army Corps of Engineers, Portland District struggles to refill two reservoirs for the recreation season.
  • Poor water year continues - Corps hosts info session

    As warm, dry weather continues, the U.S. Army Corps of Engineers, Portland District is seeing a worsening water year as it strives to refill 13 Willamette Valley reservoirs for the upcoming recreation season.
  • Memphis District Hurley: Thawed out and ready to dredge

    During most off seasons, maintaining the Hurley takes a few months and a couple of crews to get everything done. This off-season was a bit different, as unexpected weather posed more obstacles than usual. Much of the south, including Memphis, Tennessee, was hit hard with frigid temperatures in mid-February this year. The last time Memphians experienced weather like this was in 1994.  From frozen pipes to no electricity, many people and structures were impacted by the icy weather, including the district’s Dredge Hurley.
  • Caution urged by Corps due to high waters and heavy rains

    KANSAS CITY, Mo. – The U.S. Army Corps of Engineers, Kansas City District, urges caution due to recent an¬d potential future heavy rains and resulting high waters on area rivers and streams. Missouri River stages will remain high for next several days from Rulo, Neb. to mid-Missouri. With moisture moving in from the Gulf of Mexico, it will be important for residents and businesses to remain weather aware, and to heed National Weather Service watches and warnings.