Washington: Today - Sunny, high in the low 40s, low near 30. The chance of precipitation is near zero. Thursday - Sunny, high near 50.

Maryland and Virginia: Today - Sunny, highs from the 30s to the mid 40s lows in the 20s. Thursday - Sunny, highs in the 40s to near 50.

Lower Potomac and Chesapeake Bay: Today - Fair, with visibility of more than 5 miles. Wind will be from the west at from 8 to 15 knots. Much of the bay is still ice-covered.

West Virginia: Today - Partly cloudy, high from the mid 30s to the low 40s, lows from the 20s to the low 30s. Thursday - Sunny, highs from the 40s to the low 50s.

Extended Area Forecast for Friday through Sunday: Variably cloudy through the period. Highs will be from the mid 40s to the mid 50s, lows in the 30s. Normal Washington temperatures for the period are a high of 45 and a low of 26.

The National Weather Forecast for today - Showers will scatter southward through western Washington into northwestern Oregon. Light snow will reach from the mountains of northern New England, across the lower Great Lakes and the upper Ohio Valley, into upper Michigan, Southern Texas will have light rain. Except for cloudy skies over Florida, the rest of the nation will be mostly sunny. It will be warmer across the Great plains, the Mississippi Valley and the Eastern Gulf coast, but not so cold in the remainer of the nation, where it will be mild.

ALMANAC DATA for today - Sun rises 7:07 a.m., sets 5:39 p.m.; moon sets 10:06 a.m. Tides: High 11:46 a.m. Low 6:01 and 6:42 p.m. High and low tides at the following points can be obtained by subtracting the hours indicated from the tides above. Annapolis (3 1/2); 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 23 for the pollutant, sulfure dioxide. Index values between zero and 24 indicate good air quality. When the index exceeds 100 the air becomes hazardous and persons with lung, heart and eye problems should restrict their activity. The forecast for today indicated the air quality will be good.

The National Weather Service forecasts that the Potomac River stage at little Falls will be near 3.1 feet.

Washington data at 7 p.m. (EST) yesterday: Highest temperature since 7 a.m. yesterday, 37 degrees at 2:45 p.m. Lowest temperature since midnight, 16 degrees at 6:25 a.m. Record high temperature for today, 68 degrees in 1949. Record low temperature for today - 7 degrees in 1899. Deficiency of temperature since Feb. 1, 50 degrees. Deficiency of temperature since Jan. 1, 354 degrees. Relative humidity: Maximium, 62 per cent at 6 a.m.; Minimum, 26 per cent at 4 p!m. Deficiency of precipitation since Feb. 1, 64 inches. Deficiency of precipitation since Jan. 1, 1.76 inches. Highest observed wind since 7 a.m, 12 miles per hour from the north at 8:53 a.m. Peak gust since 7 a.m., 16 miles per hour from the north 8:56 a.m. Local Temp. Humidity(TABLE) Time(COLUMN)(COLUMN).(COLUMN)H. 9 a.m.(COLUMN)22(COLUMN)50 10 a.m.(COLUMN)26(COLUMN)42 11 a.m.(COLUMN)29(COLUMN)40 12 noon(COLUMN)31(COLUMN)38 1 p.m.(COLUMN)34(COLUMN)32 2 p.m.(COLUMN)35(COLUMN)32 3 a.m.(COLUMN)37(COLUMN)31 4 p.m.(COLUMN)37(COLUMN)26 5 p.m.(COLUMN)36(COLUMN)32 6 p.m.(COLUMN)33(COLUMN)40 7 p.m.(COLUMN)31(COLUMN)41 1 a.m.(COLUMN)21(COLUMN)50 2 a.m.(COLUMN)20(COLUMN)52 3 a.m.(COLUMN)19(COLUMN)56 4 a.m.(COLUMN)18(COLUMN)59 5 a.m.(COLUMN)18(COLUMN)59 6 a.m.(COLUMN)17(COLUMN)62 8 a.m.(COLUMN)19(COLUMN)59(END TABLE) Temperatures ending 8 a.m. (EST) yesterday:(TABLE) Albany(COLUMN)19(COLUMN)87 Albuquerque(COLUMN)53(COLUMN)23 Amarilo(COLUMN)46(COLUMN)26 Anchorage(COLUMN)43(COLUMN)33 Asheville(COLUMN)35(COLUMN)06 Atlanta(COLUMN)41(COLUMN)19 Altantic City(COLUMN)29(COLUMN)18 Austin(COLUMN)59(COLUMN)44 Baltimoe(COLUMN)32(COLUMN)11 Billings(COLUMN)46(COLUMN)26 Birmingham(COLUMN)41(COLUMN)18 Bismarck(COLUMN)34(COLUMN)14 Boise(COLUMN)28(COLUMN)18 Boston(COLUMN)28(COLUMN)18 Brownsville(COLUMN)67(COLUMN)56 Buffalo(COLUMN)16(COLUMN)09 Burlington(COLUMN)12(COLUMN)01 Casper(COLUMN)45(COLUMN)25 Charleston, S.C.(COLUMN)44(COLUMN)32 Charleston, W.Va.(COLUMN)21(COLUMN)10 Charlotte(COLUMN)38(COLUMN)18 Cheyenne(COLUMN)49(COLUMN)24 Chicago(COLUMN)15(COLUMN)87 Cincinnati(COLUMN)18(COLUMN)- 2 Cleveland(COLUMN)14(COLUMN)- 8 Columbia, S.C.(COLUMN)46(COLUMN)15 Columbus(COLUMN)15(COLUMN)- 13 Del.-Ft. Worth(COLUMN)52(COLUMN)39 Dayton(COLUMN)15(COLUMN)- 5 Denver(COLUMN)52(COLUMN)24 Des Moines(COLUMN)25(COLUMN)11 Detroit(COLUMN)21(COLUMN)- 3 Duluth(COLUMN)16(COLUMN)14 El Paso(COLUMN)57(COLUMN)29 Fairbanks(COLUMN)15(COLUMN)03 Fargo(COLUMN)22(COLUMN)07 Flagstaff(COLUMN)47(COLUMN)15 Great Falls(COLUMN)52(COLUMN)36 Hartford(COLUMN)24(COLUMN)16 Helena(COLUMN)41(COLUMN)18 Honolulu(COLUMN)82(COLUMN)68 Houston(COLUMN)58(COLUMN)47 Indianapolis(COLUMN)17(COLUMN)- 4 Jackson, (Miss.)(COLUMN)51(COLUMN)25 Jacksonville(COLUMN)57(COLUMN)33 Juneau(COLUMN)43(COLUMN)36 Kansas City(COLUMN)25(COLUMN)14 Las Vegas(COLUMN)67(COLUMN)37 Little Rock(COLUMN)36(COLUMN)20 Los Angeles(COLUMN)80(COLUMN)54 Louisville(COLUMN)23(COLUMN)09 Memphis(COLUMN)37(COLUMN)24 Miami Beach(COLUMN)69(COLUMN)60 Midlandodessa(COLUMN)47(COLUMN)40 Milwaukee(COLUMN)16(COLUMN)09 Mpls.-St. Paul(COLUMN)20(COLUMN)13 Nashville(COLUMN)31(COLUMN)10 New Orleans(COLUMN)54(COLUMN)39 New York(COLUMN)28(COLUMN)17 Norfolk(COLUMN)32(COLUMN)22 North Platte(COLUMN)46(COLUMN)11 Oklahoma City(COLUMN)44(COLUMN)30 Omaha(COLUMN)30(COLUMN)18 Orlando(COLUMN)63(COLUMN)48 Philadelphia(COLUMN)29(COLUMN)11 Phoenix(COLUMN)76(COLUMN)51 Pittsburgh(COLUMN)15(COLUMN)- 5 Portland, Me.(COLUMN)25(COLUMN)- 1 Portland, Ore.(COLUMN)49(COLUMN)37 Providence(COLUMN)27(COLUMN)12 Raleigh(COLUMN)35(COLUMN)10 Rapil City(COLUMN)48(COLUMN)27 Reno(COLUMN)59(COLUMN)38 Richmond(COLUMN)37(COLUMN)12 St. Louis(COLUMN)23(COLUMN)10 St. Prbg-ampa(COLUMN)59(COLUMN)42 Salt Lake City(COLUMN)44(COLUMN)22 San Antonio(COLUMN)60(COLUMN)41 San Diego(COLUMN)76(COLUMN)54 San Francisco(COLUMN)64(COLUMN)53 San Juan(COLUMN)80(COLUMN)78 St. Ste Marie(COLUMN)16(COLUMN)03 Seattle(COLUMN)60(COLUMN)46 Shreveport(COLUMN)56(COLUMN)32 Sioux Falls(COLUMN)33(COLUMN)14 Spokane(COLUMN)35(COLUMN)25 Syracuse(COLUMN)19(COLUMN)10 Tucson(COLUMN)68(COLUMN)47 Tulsa(COLUMN)41(COLUMN)30 Washington(COLUMN)33(COLUMN)16 Wichita(COLUMN)36(COLUMN)23(END TABLE) Temperatures Abroad Yesterday(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)Temp. Aberdeen(COLUMN)clear(COLUMN)1 p.m.(COLUMN)41 Amsterdam(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)46 Ankara(COLUMN)clody(COLUMN)3 p.m.(COLUMN)37 Athens(COLUMN)clear(COLUMN)2 p.m.(COLUMN)55 Auckland(COLUMN)clear(COLUMN)Midnight(COLUMN)61 Berlin(COLUMN)rain(COLUMN)1 p.m.(COLUMN)43 Birmingham(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)45 Brussels(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)46 Cairo(COLUMN)cloudy(COLUMN)2 p.m.(COLUMN)64 Casablanca(COLUMN)cloudy(COLUMN)noon(COLUMN)61 Copenhagen(COLUMN)rain(COLUMN)1 p.m.(COLUMN)46 Geneva(COLUMN)rain(COLUMN)1 p.m.(COLUMN)48 Hong Kong(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)55 Lisbon(COLUMN)cloudy(COLUMN)noon(COLUMN)61 London(COLUMN)clear(COLUMN)1 p.m.(COLUMN)48 Madrid(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)45 Matta(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)61 Manila(COLUMN)clear(COLUMN)8 p.m.(COLUMN)75 Moscow(COLUMN)cloudy(COLUMN)3 p.m.(COLUMN)10 New Delhi(COLUMN)clear(COLUMN)5 p.m.(COLUMN)70 Nice(COLUMN)clear(COLUMN)1 p.m.(COLUMN)55 Oslo(COLUMN)Clear(COLUMN)1 p.m.(COLUMN)28 Paris(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)52 Peking(COLUMN)clear(COLUMN)8 p.m.(COLUMN)59 Rome(COLUMN)clear(COLUMN)1 p.m.(COLUMN)59 Saigon(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)81 Sofia(COLUMN)cloudy(COLUMN)2 p.m.(COLUMN)37 Stockholm(COLUMN)snow(COLUMN)1 p.m.(COLUMN)30 Sydney(COLUMN)clear(COLUMN)10 p.m.(COLUMN)70 Tel Aviv(COLUMN)cloudy(COLUMN)2 p.m.(COLUMN)57 Tokyo(COLUMN)clear(COLUMN)9 p.m.(COLUMN)39 Tunis(COLUMN)cloudy(COLUMN)11 p.m.(COLUMN)66 Vienna(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)50 Warsaw(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)43(END TABLE) Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)pt. cldy.(COLUMN)86(COLUMN)72 Barbados(COLUMN)pt. cldy.(COLUMN)82(COLUMN)72 Bermuda(COLUMN)cloudy(COLUMN)42(COLUMN)55 Boosta(COLUMN)cloudy(COLUMN)63(COLUMN)39 Calgary(COLUMN)clear(COLUMN)50(COLUMN)29 Edmonton(COLUMN)cloudy(COLUMN)45(COLUMN)19 Harvana(COLUMN)cloudy(COLUMN)75(COLUMN)69 Montego Bay(COLUMN)cldy.(COLUMN)84(COLUMN)69 Mexico City(COLUMN)fog(COLUMN)68(COLUMN)41 Monterry(COLUMN)cloudy(COLUMN)57(COLUMN)48 Montreal(COLUMN)pt. cldy.(COLUMN)14(COLUMN)5 Nassau(COLUMN)cloudy(COLUMN)75(COLUMN)66 Ottawa(COLUMN)clear(COLUMN)16(COLUMN)02 Regina(COLUMN)clear(COLUMN)34(COLUMN)16 St. Kitts(COLUMN)pt. cldy.(COLUMN)86(COLUMN)73 St. Thomas(COLUMN)pt. cldy.(COLUMN)83(COLUMN)73 Toronot(COLUMN)cloudy(COLUMN)19(COLUMN)0 Vancouver(COLUMN)clear(COLUMN)52(COLUMN)39 Veracruz(COLUMN)pt. cldy.(COLUMN)75(COLUMN)68 Winnipeg(COLUMN)cloudy(COLUMN)21(COLUMN)9(END TABLE)