682 FPUS71 KLWX 221632 NOWLWX SHORT TERM FORECAST NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 1232 PM EDT MON MAR 22 2010 DCZ001-MDZ009-VAZ053-054-221730- ARLINGTON/FALLS CHURCH/ALEXANDRIA VA-DISTRICT OF COLUMBIA DC-FAIRFAX VA-MONTGOMERY MD- 1232 PM EDT MON MAR 22 2010 .NOW... AT 1231 PM EDT...A LINE OF THUNDERSTORMS WAS AFFECTING MUCH OF SOUTHERN AND CENTRAL FAIRFAX COUNTIES...ALONG A LINE EXTENDING FROM OAKTON TO 2 MILES SOUTHEAST OF LORTON...MOVING NORTH AROUND 50 MPH. LOCATIONS SUCH AS FRANCONIA...LINCOLNIA...NORTH SPRINGFIELD...DUNN LORING...BELLEVIEW...NORTH POTOMAC...BAILEYS CROSSROADS...WESTOVER... BARCROFT AND LITTLE FALLS WILL LIKELY BE AFFECTED THROUGH 130 PM EDT. A LARGE PORTION OF NORTHWESTERN DISTRICT OF COLUMBIA...EASTERN MONTGOMERY...WESTERN CITY OF ALEXANDRIA...CITY OF FAIRFAX...CITY OF FALLS CHURCH...ARLINGTON AND EASTERN FAIRFAX COUNTIES WILL LIKELY BE AFFECTED BY THESE STORMS THROUGH 130 PM EDT. OCCASIONAL CLOUD TO GROUND LIGHTNING IS OCCURRING. WIND GUSTS OF 30 TO 40 MPH...AND SMALL HAIL CAN BE EXPECTED WITH THIS ACTIVITY. HEAVY DOWNPOURS MAY REDUCE VISIBILITY BELOW A MILE AND CAUSE PONDING OF WATER ON ROADWAYS. $$ GMS