142  
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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