Washington: Today - Sunny, high in the mid 30s, low near 20. The chance of precipitation is near zero today and 10 per cent tonight. Wednesday - Partly cloudy, high in the mid 40s.

Maryland and Virginia: Today - Sunny, highs from the low 30s to the 40s, lows in the 20s. Wednesday - Partly cloudy, highs from the 30s to 40s.

Lower Potomac and Chesapeake Bay: Today - Fair, with visibility of more than 5 miles. Wind will be from the northwest at from 5 to 15 knots today and at less than 10 knots tonight. The bay is still ice covered.

West Virginia: Today - Sunny, highs from the 20s to the lows 30s, lows from near zero to the teens. Wednesday - Partly cloudy, highs from the mid 30s to the low 40s.

Extended Area Forecast for Thursday through Saturday: Partly cloudy through the period, but a chance of precipitation on Friday. Highs will be from the 40s to the lows 50s, lows from the mid 20s to the mid 30s. Normal Washington temperatures for the period are a high of 45 and a low of 28.

The Nation Yesterday: Mild weather that has been over the western third of the nation spilled into the northern and central Plains yesterday. Afternoon temperatures rose above freezing as far north as North Dakota. The warming trend should continue in the plains and spread eastward into the Great Lakes and Ohio Valley today. Near or above normal temperatures are forecast for most snow covered sections of the Midwest and northeast by the middle of the week. As a result, some melting of snowpack and some break up of ice on rivers may begin. Yesterday, however cold over the northeast, where high temperatures ranged from the teens to the 20s. Snow continued to diminish in the northeast, with only some flurries reported from central New York into northern Maine. Cool weather persisted in the southeast. High temperatures in Florida ranged from the 50s in the north to the low 70s in the south. Rain increased over south central and southwestern Texas.

The National Weather Forecast for today - Showers will move into the northern and central Pacific Coast, with cloudy skies extending into the northern and central Plateau. Snow flurries will continue around the Great Lakes, and there will be a chance of rain in the Florida peninsula. Most other areas will have clear skies. Temperatures will be warmer from the plains into the Ohio Valley and Great Lakes. It will continue cold along the Atlantic Coast and in the Gulf states. Temperatures will remain mild from the Rockies to the Pacific Coast, except in the northern Plateau, where it will be cold.

Almanac Data for today - Sun rises 7:09 a.m., sets 5:36 p.m.; moon rises 9:45 p.m. sets 8:52 a.m. Tides: High 10:08 a.m. and 11:31 p.m., low 4:33 a.m. and 4:58 p.m. High and low tides at the following points can be obtained by subtracting the hours indicated from the tides above. Annapolis (3 1)4); Bloody Point Lighthouse (4 1/2); Deale, Md. (4 1/2); Colonial Beach (6); Norfolk (1 1/2); Virginia Beach (1); Solomon's Island (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 2 p.m. to 3 p.m. period was 20 for the pollutant, photo chemical oxidants. Index values between zero and 24 indicate good air quality. When the index exceeds 100 the air becomes hazardous and personw with the lung, heart and eye problems should restrict thieir activity. The forecast for today indicates the air quality will be good.

The National Weather Service forecasts that the Potomac River stage at Little Falls will be near 1.1 feet.

Washington data at 7 p.m. (EST) yesterday: Highest temperature since 7 a.m. yesterday, 33 degrees at 2:15 p.m. Lowest temperature since midnight, 14 degrees at 6:30 a.m. Record high temperature for today, 68 degrees in 1906. Record low temperature for today, zero degrees in 1895. Deficiency of temperature since Feb. 1, 41 degrees. Deficiency of temperature since Jan. 1, 345 degrees. Relative humidity: Maximum, 51 per cent at 3 a.m.; Minimum, 33 per cent at 4 p.m. Deficiency of precipitation since Feb. 1, .56 inches. Deficiency of precipitation since Jan. 1, 1.68 inches. Highest observed, wind since 7 a.m., 20 miles per hour from the northwest at 2:53 p.m. Peak gust since 7 a.m., 32 miles per hour from the northwest at 9:56 a.m. Temperatures ending 8 p.m. (EST) yesterday(TABLE) City(COLUMN)L.(COLUMN)H. Albany(COLUMN)8(COLUMN)19 Albuquerque(COLUMN)31(COLUMN)53 Amarillo(COLUMN)21(COLUMN)46 Anchorage(COLUMN)33(COLUMN)40 Asheville(COLUMN)12(COLUMN)35 Atlanta(COLUMN)20(COLUMN)41 Atlantic City(COLUMN)17(COLUMN)29 Austin(COLUMN)46(COLUMN)59 Baltimore(COLUMN)13(COLUMN)32 Billings(COLUMN)24(COLUMN)46 Birmingham(COLUMN)20(COLUMN)41 Bismarck(COLUMN)2(COLUMN)34 Boise(COLUMN)16(COLUMN)28 Boston(COLUMN)16(COLUMN)28 Brownsville(COLUMN)57(COLUMN)67 Buffalo(COLUMN)8(COLUMN)16 Burlington, Vt.(COLUMN)8(COLUMN)12 Casper(COLUMN)16(COLUMN)45 Charleston, S.C.(COLUMN)30(COLUMN)44 Charleston, W.Va.(COLUMN)0(COLUMN)21 Charlotte(COLUMN)20(COLUMN)38 Cheyenne(COLUMN)11(COLUMN)49 Chicago(COLUMN)3(COLUMN)15 Cincinnati(COLUMN)8(COLUMN)18 Cleveland(COLUMN)5(COLUMN)14 Columbia, S.C.(COLUMN)20(COLUMN)46 Columbus, Ohio(COLUMN)3(COLUMN)15 Dal.-Ft. Worth(COLUMN)33(COLUMN)52 Dayton(COLUMN)4(COLUMN)15 Denver(COLUMN)21(COLUMN)52 Des Moines(COLUMN)2(COLUMN)25 Detroit(COLUMN)3(COLUMN)21 Duluth(COLUMN)9(COLUMN)16 El Paso(COLUMN)44(COLUMN)57 Fairbanks(COLUMN)2(COLUMN)14 Fargo(COLUMN)1(COLUMN)22 Flagstaff(COLUMN)19(COLUMN)47 Great Falls(COLUMN)33(COLUMN)52 Hartford(COLUMN)13(COLUMN)24 Helena(COLUMN)16(COLUMN)41 Honolulu(COLUMN)71(COLUMN)82 Houston(COLUMN)48(COLUMN)58 Indianapolis(COLUMN)11(COLUMN)17 Jackson, Miss.(COLUMN)28(COLUMN)51 Jacksonville(COLUMN)26(COLUMN)57 Juneau(COLUMN)41(COLUMN)43 Kansas City(COLUMN)7(COLUMN)25 Las Vegas(COLUMN)36(COLUMN)67 Little Rock(COLUMN)20(COLUMN)36 Los Angeles(COLUMN)53(COLUMN)80 Louisville(COLUMN)6(COLUMN)23 Memphis(COLUMN)24(COLUMN)37 Miami Beach(COLUMN)57(COLUMN)69 Midland-Odessa(COLUMN)33(COLUMN)47 Milwaukee(COLUMN)3(COLUMN)16 Mpls.-St. Paul(COLUMN)1(COLUMN)18 Nashville(COLUMN)11(COLUMN)31 New Orleans(COLUMN)30(COLUMN)54 New York(COLUMN)13(COLUMN)28 Norfolk(COLUMN)17(COLUMN)32 North Platte(COLUMN)4(COLUMN)46 Oklahoma City(COLUMN)20(COLUMN)44 Omaha(COLUMN)4(COLUMN)30 Orlando(COLUMN)36(COLUMN)63 Philadelphia(COLUMN)8(COLUMN)29 Phoenix(COLUMN)44(COLUMN)76 Pittsburgh(COLUMN)7(COLUMN)15 Portland, Maine(COLUMN)4(COLUMN)25 Portland, Ore.(COLUMN)37(COLUMN)49 Providence(COLUMN)14(COLUMN)27 Raleigh(COLUMN)12(COLUMN)35 Rapid City(COLUMN)16(COLUMN)48 Reno(COLUMN)21(COLUMN)59 Richmond(COLUMN)13(COLUMN)37 St. LOuis(COLUMN)3(COLUMN)23 St. Prbg.-T'mpa(COLUMN)38(COLUMN)59 Salt Lake City(COLUMN)19(COLUMN)44 San Antonio(COLUMN)45(COLUMN)60 San Diego(COLUMN)50(COLUMN)76 San Francisco(COLUMN)48(COLUMN)64 San Juan(COLUMN)71(COLUMN)80 St. Ste. Marie(COLUMN)11(COLUMN)16 Seattle(COLUMN)40(COLUMN)60 Shreveport(COLUMN)29(COLUMN)56 Sioux Falls(COLUMN)1(COLUMN)33 Spokane(COLUMN)26(COLUMN)35 Syracuse(COLUMN)10(COLUMN)19 Tucson(COLUMN)39(COLUMN)68 Tulsa(COLUMN)16(COLUMN)41 Washington(COLUMN)14(COLUMN)33 Wichita(COLUMN)13(COLUMN)36(END TABLE) Temperatures Abroad Yesterday(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)Temp. Aberdeen(COLUMN)rain(COLUMN)1 p.m.(COLUMN)37 Amsterdam(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)48 Ankara(COLUMN)cloudy(COLUMN)3 p.m.(COLUMN)36 Athens(COLUMN)cloudy(COLUMN)2 p.m.(COLUMN)63 Auckland(COLUMN)clear(COLUMN)midnight(COLUMN)66 Berlin(COLUMN)rain(COLUMN)1 p.m.(COLUMN)43 Birmingham(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)48 Brussels(COLUMN)rain(COLUMN)1 p.m.(COLUMN)46 Cairo(COLUMN)cloudy(COLUMN)2 p.m.(COLUMN)66 Casablanca(COLUMN)cloudy(COLUMN)noon(COLUMN)61 Copenhagen(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)39 Dublin(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)45 Geneva(COLUMN)clear(COLUMN)1 p.m.(COLUMN)52 Hong Kong(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)89 Lisbon(COLUMN)fog(COLUMN)noon(COLUMN)52 London(COLUMN)cloudy(COLUMN)1p.m.(COLUMN)50 Madrid(COLUMN)clear(COLUMN)1 p.m.(COLUMN)54 Malta(COLUMN)clear(COLUMN)1 p.m.(COLUMN)61 Manila(COLUMN)clear(COLUMN)8 p.m.(COLUMN)75 Moscow(COLUMN)cloudy(COLUMN)3 p.m.(COLUMN)12 New Delhi(COLUMN)5 p.m.(COLUMN)66 Nice(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)55 Oslo(COLUMN)snow(COLUMN)1 p.m.(COLUMN)23 Paris(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)52 Peking(COLUMN)clear(COLUMN)8 p.m.(COLUMN)36 Rome(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)61 Saigon(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)81 Sofia(COLUMN)cloudy(COLUMN)2 p.m.(COLUMN)45 Stockholm(COLUMN)fog(COLUMN)1 p.m.(COLUMN)32 Sydney(COLUMN)cloudy(COLUMN)10 p.m.(COLUMN)70 Tel Aviv(COLUMN)cloudy(COLUMN)2 p.m.(COLUMN)59 Tokyo(COLUMN)cloudy(COLUMN)9 p.m.(COLUMN)36 Tunis(COLUMN)clear(COLUMN)1 p.m.(COLUMN)66 Vienna(COLUMN)rain(COLUMN)1 p.m.(COLUMN)43 Warsaw(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)36(END TABLE) Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulo(COLUMN)clear(COLUMN)90(COLUMN)72 Barbados(COLUMN)pt. cldy(COLUMN)82(COLUMN)75 Bermuda(COLUMN)cloudy(COLUMN)67(COLUMN)56 Bogota(COLUMN)cloudy$68(COLUMN)44 Calgary(COLUMN)pt. cldy(COLUMN)48(COLUMN)39 Edmonton(COLUMN)pt. cldy(COLUMN)34(COLUMN)19 Havana(COLUMN)pt. cldy(COLUMN)70(COLUMN)62 Montego Bay(COLUMN)pt. cldy(COLUMN)84(COLUMN)73 Mexico City(COLUMN)pt. cldy(COLUMN)72(COLUMN)50 Monterrey(COLUMN)rain(COLUMN)63(COLUMN)55 Montreal(COLUMN)cloudy(COLUMN)14(COLUMN)5 Nassau(COLUMN)pt. cldy(COLUMN)73(COLUMN)54 Ottawa(COLUMN)pt. cldy(COLUMN)9(COLUMN)3 Regina(COLUMN)clear(COLUMN)28(COLUMN)9 St. Kitts(COLUMN)pt. cldy(COLUMN)84(COLUMN)73 St. Thomas(COLUMN)pt. cldy(COLUMN)83(COLUMN)71 Toronto(COLUMN)clear(COLUMN)12(COLUMN)3 Vancouver(COLUMN)cloudy(COLUMN)54(COLUMN)41 Veracruz(COLUMN)cloudy(COLUMN)77(COLUMN)64 Winnipeg(COLUMN)snow(COLUMN)3(COLUMN)2(END TABLE)