Drought Information Statement
Issued by NWS Sterling, VA

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000 AXUS71 KLWX 201238 DGTLWX DCC001-MDC003-005-013-021-027-031-033-VAC003-013-015-047-059-061- 079-091-107-113-125-137-139-153-157-165-177-179-510-540-600-610- 630-660-683-685-790-820-WVC071-042300- Drought Information Statement National Weather Service Baltimore MD/Washington DC 838 AM EDT Thu Apr 20 2017 ...SOME RAINY PERIODS...SOME DRY PERIODS...LITTLE CHANGE IN DROUGHT CONDITIONS... SYNOPSIS... As of April 18th 2017, the U.S. Drought Monitor indicates that no change has occurred in the past two weeks, with a couple periods of rainfall, but lingering long-term deficits. Moderate Drought (D1) is indicated in most of Northern and Central Virginia, except near Winchester and east of Fredericksburg. Moderate Drought is also indicated in the District of Columbia, Montgomery and Howard Counties in Maryland, and in portions of Frederick, Carroll, Baltimore, and Anne Arundel Counties in Maryland, and Pendleton County West Virginia. A small portion of the area is designated as Abnormally Dry (D0), which includes portions of Shenandoah County, Warren County, Clarke County, Jefferson County, Berkeley County, Washington County, Charles County, and Harford County. SUMMARY OF IMPACTS... State and Local Declarations: The Maryland Department of the Environment (MDE) continues the declaration of a Drought Warning for the Central Region of the state, which includes Frederick, Carroll, and Harford Counties, and portions of Montgomery and Baltimore Counties not served by the Baltimore or WSSC public water systems. This drought warning is based on indicators of precipitation, groundwater, streamflow, and reservoir storage. In a Drought Warning, water conservation is encouraged. The Virginia Department of Environmental Quality (DEQ) continues a Drought Watch for the Northern Piedmont region of the state, which includes Culpeper, Greene, Madison, Orange, Rappahannock, Spotsylvania, and Stafford Counties, and the City of Fredericksburg, and for the Northern Virginia region, which specifically applies to public or private groundwater supplies or private surface water supplies in Fauquier, Prince William, and Loudoun Counties. Water systems using the Potomac or Occoquan are not included in this declaration. Hydrologic Impacts: Soil moisture remains somewhat below normal, but is significantly improved from the worst conditions of the winter. A portion of the Moderate Drought (D1) region does have soil moisture in the 10th to 20th percentile range for this time of year. After making a brief comeback, groundwater has returned to below normal levels following a recent dry spell. This goes for both shallow and deeper aquifers. Agricultural Impacts: Planting is ongoing for the season. Agricultural impacts, if any, will begin to show themselves if dry weather persists. CLIMATE SUMMARY... Rainfall over the last seven days has been less than an inch areawide. Parts of southern Maryland remained completely dry during that time, but those areas are not currently in any drought designation. Many areas are still above normal on rainfall over the past two weeks to one month, but at longer timescales the deficits creep back in, with rainfall generally only 50-75 percent of normal long-term. PRECIPITATION/TEMPERATURE OUTLOOK... A recent unsettled pattern with light rain will continue into the weekend of 4/22-4/23. The rain will intensify on the north side of a cold front. Total rain will be around an inch near the Pennsylvania border, but could be as much as three inches in the southern portion of area (where it`s been the driest recently, so that would be good news). Some stream flooding cannot be ruled out. Another chance for rain could occur around midweek next week (April 27th). After that, there`s pretty high confidence that the final weekend of April will feature dry weather and unseasonably hot temperatures. The outlook for week two favors above normal temperatures and near to above normal precipitation. The drought outlook calls for drought conditions to be alleviated by the end of June in most of the region. HYDROLOGIC SUMMARY AND OUTLOOK... While weekly average streamflows have improved as a result of recent rain events, due to the low groundwater and soil moisture, those streamflows return to seasonally low levels as soon as we get a stretch of several dry days in a row. These low baseflow levels do not preclude flooding, but they do mean that more rain is required to cause flooding of streams. Soil moisture and groundwater levels are likely to remain generally status quo during the upcoming two week period, with some slight drying if a long dry spell takes shape. NEXT ISSUANCE DATE... This product is issued periodically when Moderate Drought (D1) is the worst-indicated category in the Baltimore/Washington area of responsibility. The next issuance will be Thursday, May 4th, 2017. && RELATED WEB SITES... Additional information on current drought conditions may be found at the following web addresses... US Drought Monitor...http://www.droughtmonitor.unl.edu NWS Drought Page...http://www.nws.noaa.gov/om/drought Climate Prediction Center (CPC)...http://www.cpc.ncep.noaa.gov ADDITIONAL RIVER INFORMATION... National Weather Service...http://water.weather.gov US Geological Survey...http://water.usgs.gov ACKNOWLEDGMENTS... The drought monitor is a multi-agency effort involving NOAA`s National Weather Service and National Climatic Data Center, the USDA, state and regional center climatologists, and the National Drought Mitigation Center. Information for this statement has been gathered from NWS and FAA observation sites, State Cooperative Extension Services, the USDA, USACE, and USGS. QUESTIONS OR COMMENTS... If you have questions or comments about this Drought Information Statement...please contact... National Weather Service 43858 Weather Service Road Sterling, VA 20166 Phone: 703-996-2200 lwxwebmaster@noaa.gov $$

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