Washington; Today - Sunny, high near 40, low 15 to 20. The chance of precipitation is near zero through tonight. Sunday - Increasing cloudiness, high near 40. Saturday winds will be northerly at less than 10 mph.

Maryland and Virginia: Today - Mostly, sunny, high in the 30s, lows in the teens to mid 20s. Sunday - Increasing cloudiness, high in the 30s.

Lower Potomac and Chesapeake Bay - Fair through tonight with winds from the north dimishing to near 5 knots by nightfall. Visibility will be 5 miles or better. Waves are restricted due to considerable ice cover.

Extended Area Forecast for Monday through Wednesday - Snow likely Monday ending Tuesday. It will be clear Wendesday. Highs will be in the 30s, lows in the 20s. Normal Washington temperatures for the period are a high of 46 and a low of 28.

West Virginia: Today - Sunny, high in the low to mid 30s, low 5 to 15. Sunday - Increasing cloudiness, high in the 30s.

The National Weather Forecast for today - Snow will spread from the Plateau Region across northern and central portions of the Rockies and the Plains into the middle Mississippi Valley. Showers will occur from southern California and Arizona across the souther Rockies into the southern Plains and parts of the western Gulf Coast. Most other areas will have clear or partly cloudy skies. Temperatures will be warmer in the southern Plains, the lower Mississippi Valley and colder from the northern Rockies to southern California and Arizona. Cold weather will continue in the north central and northeastern U.S.

Aimanac Data for today -

Sun Rises 7:04 a.m., sets 5:41 p.m.; moon rises 9:21 a.m., sets 10:23 p.m. Tides: high 10:57 a.m. and 11:19 p.m., low 5:16 a.m. and 5:41 p.m. High and low tides at the following locations may be obtained by subtracting the hours indicated from the tides above. Annapolis (1 1/2), Bloody Point Lighthouse (4 1/2), Deal, Md. (4 1/2), Colonial Beach (6), Norfolk (1 1/2), Virginia Beach 1, Solomons Islands (6 1/2), Point Lookout (7).

The Council of Governments' Air Quality Index for yesterday showed the high reading in the Washington area during the 3 p.m. period was 31 for the pollutant, photochemical oxidants. Index values between 25 and 49 indicate fair air quality. When the index exceeds 100 the air is considered very unhealthy and individuals with lung, heart and eye ailments are urged to restrict their activity. The forecast for today indicates that the air quality will improve.

The National Weather Service forecasts the Potomac River stage at Little Falls should fall to 3.8 feet today. Local Temp., Humidity(TABLE) Time(COLUMN)T.(COLUMN)H. 12 mid.(COLUMN)25(COLUMN)55 1 a.m.(COLUMN)25(COLUMN)53 2 a.m.(COLUMN)25(COLUMN)53 3 a.m.(COLUMN)23(COLUMN)57 4 a.m.(COLUMN)21(COLUMN)59 5 a.m.(COLUMN)22(COLUMN)60 6 a.m.(COLUMN)21(COLUMN)59 7 a.m.(COLUMN)21(COLUMN)59 8 a.m.(COLUMN)24(COLUMN)52 9 a.m.(COLUMN)28(COLUMN)42 10 a.m.(COLUMN)31(COLUMN)36 11 a.m.(COLUMN)32(COLUMN)31 12 noon(COLUMN)34(COLUMN)32 1 p.m.(COLUMN)35(COLUMN)31 2 p.m.(COLUMN)35(COLUMN)31 3 p.m.(COLUMN)36(COLUMN)29 4 p.m.(COLUMN)36(COLUMN)29 5 p.m.(COLUMN)34(COLUMN)33 6 p.m.(COLUMN)33(COLUMN)36 7 p.m.(COLUMN)31(COLUMN)39(END TABLE) Temperatures ending 7 a.m. (EST) yesterday:(TABLE) City(COLUMN)H.(COLUMN)L. Albany(COLUMN)31(COLUMN)-1 Albuqueque(COLUMN)49(COLUMN)36 Amarillo(COLUMN)18(COLUMN)10 Anchorage(COLUMN)23(COLUMN)18 Asheville(COLUMN)50(COLUMN)23 Atlanta(COLUMN)52(COLUMN)27 Atlantic City(COLUMN)33(COLUMN)20 Austin(COLUMN)38(COLUMN)31 Baltimore(COLUMN)36(COLUMN)11 Billings(COLUMN)17(COLUMN)13 Birmingham(COLUMN)46(COLUMN)24 Bismarck(COLUMN)18(COLUMN)14 Boise(COLUMN)48(COLUMN)34 Boston(COLUMN)36(COLUMN)13 Brownsville(COLUMN)59(COLUMN)41 Buffalo(COLUMN)19(COLUMN)6 Burlington, Vt.(COLUMN)21(COLUMN)-9 Casper(COLUMN)38(COLUMN)28 Charleston, S.C.(COLUMN)42(COLUMN)34 Charleston, W.V.(COLUMN)34(COLUMN)12 Charlotte(COLUMN)48(COLUMN)27 Cheyeone(COLUMN)32(COLUMN)21 Chicago(COLUMN)29(COLUMN)7 Cincinnati(COLUMN)27(COLUMN)2 Cleveland(COLUMN)25(COLUMN)0 Columbia, S.C.(COLUMN)51(COLUMN)28 Columbus(COLUMN)24(COLUMN)-3 Dal. Ft. Worth(COLUMN)31(COLUMN)23 Dayton(COLUMN)22(COLUMN)0 Denver(COLUMN)44(COLUMN)27 Des Moines(COLUMN)22(COLUMN)16 Detroit(COLUMN)29(COLUMN)6 Duluth(COLUMN)26(COLUMN)9 El Paso(COLUMN)63(COLUMN)37 Fairbanks(COLUMN)-10(COLUMN)-15 Fargo(COLUMN)23(COLUMN)-4 Flagstaff(COLUMN)40(COLUMN)35 Great Falls(COLUMN)12(COLUMN)6 Hartford(COLUMN)32(COLUMN)3 Helena(COLUMN)34(COLUMN)20 Honolulu(COLUMN)81(COLUMN)71 Houston(COLUMN)40(COLUMN)34 Indianapolis(COLUMN)24(COLUMN)0 Jackson(COLUMN)46(COLUMN)23 Jacksonville(COLUMN)53(COLUMN)37 Juneau(COLUMN)39(COLUMN)36 Kansas City(COLUMN)24(COLUMN)19 Las Vegas(COLUMN)60(COLUMN)53 Little Rock(COLUMN)34(COLUMN)23 Los Angeles(COLUMN)63(COLUMN)55 Louisville(COLUMN)32(COLUMN)11 Memphis(COLUMN)37(COLUMN)25 Miami Beach(COLUMN)70(COLUMN)53 Midland(COLUMN)40(COLUMN)23 Milwaukee(COLUMN)27(COLUMN)4 Mpls. St. Paul(COLUMN)26(COLUMN)-1 Nashville(COLUMN)36(COLUMN)21 New Orleans(COLUMN)43(COLUMN)36 New York(COLUMN)35(COLUMN)18 Norfolk(COLUMN)35(COLUMN)28 North Platte(COLUMN)17(COLUMN)12 Oklahoma City(COLUMN)26(COLUMN)20 Omaha(COLUMN)21(COLUMN)15 Orlando(COLUMN)58(COLUMN)43 Philadelphia(COLUMN)33(COLUMN)13 Phoenix(COLUMN)75(COLUMN)58 Pittsburgh(COLUMN)33(COLUMN)6 Portland, Ma.(COLUMN)36(COLUMN)-6 Portland, Ore.(COLUMN)50(COLUMN)30 Providence(COLUMN)30(COLUMN)8 Raleigh(COLUMN)43(COLUMN)25 Rapid City(COLUMN)20(COLUMN)12 Reno(COLUMN)43(COLUMN)32 Richmond(COLUMN)36(COLUMN)20 St. Louis(COLUMN)26(COLUMN)20 St. Prbg. Tampa(COLUMN)55(COLUMN)43 Salt Lake City(COLUMN)43(COLUMN)39 San Antonio(COLUMN)48(COLUMN)31 San Diego(COLUMN)67(COLUMN)60 San Francisco(COLUMN)54(COLUMN)49 San Juan(COLUMN)89(COLUMN)73 St. Ste. Marie(COLUMN)24(COLUMN)14 Seattle(COLUMN)50(COLUMN)32 Shreveport(COLUMN)32(COLUMN)26 Sioux Falls(COLUMN)20(COLUMN)14 Spokane(COLUMN)36(COLUMN)24 Syracuse(COLUMN)24(COLUMN)4 Topeka(COLUMN)25(COLUMN)20 Tucson(COLUMN)73(COLUMN)44 Tulsa(COLUMN)20(COLUMN)25 Washington(COLUMN)39(COLUMN)20 Wichita(COLUMN)25(COLUMN)19(END TABLE) Temperatures Abroad Yesterday(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)Temp Aberdeen(COLUMN)hail(COLUMN)1 p.m.(COLUMN)30 Amsterdam(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)27 Ankara(COLUMN)cloudy(COLUMN)3 p.m.(COLUMN)37 Athens(COLUMN)pt. cldy(COLUMN)2 p.m.(COLUMN)57 Auckland(COLUMN)clear(COLUMN)midnight(COLUMN)66 Berlin(COLUMN)haze(COLUMN)1 p.m.(COLUMN)25 Birmingham(COLUMN)pt cldy(COLUMN)1 p.m.(COLUMN)31 Brussels(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)27 Casblanca(COLUMN)cloudy(COLUMN)noon(COLUMN)59 Copenhagen(COLUMN)rain(COLUMN)1 p.m.(COLUMN)27 Dublin(COLUMN)clear(COLUMN)1 p.m.(COLUMN)36 Geneva(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)30 Hong Kong(COLUMN)pt. cldy(COLUMN)8 p.m.(COLUMN)70 Lisbon(COLUMN)pt. cldy(COLUMN)noon(COLUMN)50 London(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)30 Madrid(COLUMN)rain(COLUMN)1 p.m.(COLUMN)38 Malta(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)63 Manila(COLUMN)clear(COLUMN)8 p.m.(COLUMN)81 Moscow(COLUMN)cloudy(COLUMN)3 p.m.(COLUMN)25 New Delhi(COLUMN)cloudy(COLUMN)5 p.m.(COLUMN)64 Nice(COLUMN)rain(COLUMN)1 p.m.(COLUMN)41 Oslo(COLUMN)clear(COLUMN)1 p.m.(COLUMN)10 Paris(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)28 Peking(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)18 Rome(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)57 Saigon(COLUMN)clear(COLUMN)8 p.m.(COLUMN)81 Sofla(COLUMN)clear(COLUMN)2 p.m.(COLUMN)36 Stockholm(COLUMN)clear(COLUMN)1 p.m.(COLUMN)21 Sydney(COLUMN)clear(COLUMN)10 p.m.(COLUMN)72 Tel Aviv(COLUMN)pt. cldy(COLUMN)2 p.m.(COLUMN)61 Tokyo(COLUMN)rain(COLUMN)9 p.m.(COLUMN)46 Tunis(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)59 Vienna(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)28 Warsaw(COLUMN)clear(COLUMN)10 p.m.(COLUMN)18(END TABLE) Temperatures (Western hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)Clear(COLUMN)86(COLUMN)68 Barbados(COLUMN)pt. cldy(COLUMN)86(COLUMN)68 Bermuda(COLUMN)pt. cldy(COLUMN)64(COLUMN)56 Bogota(COLUMN)fair(COLUMN)59(COLUMN)39 Calgary(COLUMN)snow(COLUMN)18(COLUMN)05 Culiacan(COLUMN)clear(COLUMN)26(COLUMN)5 Edmonton(COLUMN)snow(COLUMN)12(COLUMN)7 Havana(COLUMN)pt. cldy(COLUMN)73(COLUMN)64 Kingston(COLUMN)pt. cldy(COLUMN)84(COLUMN)57 Monfego Bay(COLUMN)fair(COLUMN)84(COLUMN)75 Mexico City(COLUMN)fair(COLUMN)72(COLUMN)41 Monterray(COLUMN)cloudy(COLUMN)72(COLUMN)42 Montreal(COLUMN)clear(COLUMN)16(COLUMN)-6 Nassau(COLUMN)pt. cldy.(COLUMN)78(COLUMN)6 Ottawa(COLUMN)clear(COLUMN)18(COLUMN)01 Regina(COLUMN)snow(COLUMN)16(COLUMN)9 St. Kitts(COLUMN)fair(COLUMN)85(COLUMN)64 St. Thomas(COLUMN)fair(COLUMN)80(COLUMN)73 Toronto(COLUMN)clear(COLUMN)25(COLUMN)7 Vancouver(COLUMN)clear(COLUMN)54(COLUMN)34 Veracruz(COLUMN)clear(COLUMN)75(COLUMN)62 Winnipeg(COLUMN)clear(COLUMN)8(COLUMN)-11(END TABLE)