Washington: Today - Rain, high to mild 40s, low in mid 30s. The chance of rain is 40 per cent today and 50 per cent tonight. Saturday - Cloudy, chance of rain, high near 50s.

Maryland and Virginia: Today - Cloudy, chance of rain from [WORD ILLEGIBLE] Saturday - cloudy, chance of rain, highs in the 40s to the low 10s.

Lower Potomac and Chesapeake Bay Today - Cloudy, chance of rain. Visibility will be from 3 to 5 miles, except lower in rain. Wind will be from the south at less than 12 knots today, shifting to the southeast at from 8 to 15 knots tonight. Waves in unprotected waters will be less than 2 feet.

Extended Area Forecast for Sunday through Tuesday: Precipitation likely on Sunday, clearing by Monday or Tuesday. Highes will be from the 40s to the 50s, lows in the 50s. Normal Washington temperatures for the period are a high of 43 and a low of 28.

West Virginia: Today - Cloudy, chance of rain, highs in the 40s, [WORD ILLEGIBLE] from the upper, 20s to the [WORD ILLEGIBLE] Saturday - Partly cloudy, winds from the mid 40s to the low 50s.

The National Weather Forecast for today - Rain will fall over most of the Pacific Coast, while snow will fall over the mountains and [WORD ILLEGIBLE] Washington and over Monday, showers will reach into southeast Arizona, with snow over the central mountains. Snow will cover northern portions of the Great [WORD ILLEGIBLE] while scattered rain will reach from Pennsylvania through the middle Atlantic Coast and Georgia. Elsewhere, fair or partly cloudy skies will prevail. It will be build from the southern half of the Great Plains and of Mississippi Valley eastward through most of the southern Atlantic Coast. It will continue to be very cold over northern montana and northern Maine. The rest of the nation will be reasonably cold.

Almanac Data for today - Sun Rises 7:27 a.m., sets 5:01 p.m.; moon rises 2:11 a.m., sets 1:13 p.m.

The Council of Government's Air Quality Index for yesterday showed the high reading in the Washington a reading in the Washington area during the 2 p.m. to 3 p.m. period was 29 for the pollutant, sulfur dioxide. 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 be near 3.9 feet today.

Washington data at 7 p.m. (EST) yesterday: Highest temperature since 7 a.m. yesterday, 45 degrees at 2:20 p.m. Lowest temperature since midnight, 28 degrees at 4:25 a.m. Deficiency of temperature since Jan. 1, 10 degrees. Record high temperature for today, 72 degrees in 1950. Record how temperature for today, 2 degrees in 1884.

Relative humidity: Maximum, 66 per cent at 7 a.m. Minimum, 38 per cent at 4 p.m. Deficiency of precipitation since Jan. 1, .43 inches. Highest observed wind since 7 a.m. 6 miles per hour from the south at 1 p.m.(TABLE) Time(COLUMN)T.(COLUMN)H. 12 midnight(COLUMN)32(COLUMN)56 1 a.m.(COLUMN)32(COLUMN)56 2 a.m.(COLUMN)31(COLUMN)61 3 a.m.(COLUMN)30(COLUMN)61 4 a.m.(COLUMN)31(COLUMN)61 5 a.m.(COLUMN)31(COLUMN)61 6 a.m.(COLUMN)31(COLUMN)58 7 a.m.(COLUMN)30(COLUMN)66 8 a.m.(COLUMN)31(COLUMN)61 9 a.m.(COLUMN)32(COLUMN)59 10 a.m.(COLUMN)35(COLUMN)56 11 a.m.(COLUMN)37(COLUMN)50 12 noon(COLUMN)38(COLUMN)50 1 p.m.(COLUMN)39(COLUMN)50 2 p.m.(COLUMN)43(COLUMN)40 3 p.m.(COLUMN)41(COLUMN)47 4 p.m.(COLUMN)44(COLUMN)38 5 p.m.(COLUMN)42(COLUMN)45 6 p.m.(COLUMN)40(COLUMN)55 7 p.m.(COLUMN)41(COLUMN)53(END TABLE) Temperatures ending 8 a.m. (EST) yesterday:(TABLE) City(COLUMN)H.(COLUMN)L. Albany(COLUMN)26(COLUMN)24 Albuquerque(COLUMN)55(COLUMN)31 Amarillo(COLUMN)66(COLUMN)35 Anchorage(COLUMN)16(COLUMN)-3 Asheville(COLUMN)49(COLUMN)24 Atlanta(COLUMN)53(COLUMN)30 Atlantic City(COLUMN)33(COLUMN)31 Austin(COLUMN)60(COLUMN)55 Baltimore(COLUMN)37(COLUMN)23 Billings(COLUMN)(COLUMN) 2 Birmingham(COLUMN)52(COLUMN)32 Bismarck(COLUMN)10(COLUMN)-1 Boise(COLUMN)43(COLUMN)30 Boston(COLUMN)30(COLUMN)26 Brownsville(COLUMN)73(COLUMN)65 Buffalo(COLUMN)34(COLUMN)32 Burlington(COLUMN)24(COLUMN)21 Casper(COLUMN)39(COLUMN)27 Charleston, S.C.(COLUMN)53(COLUMN)40 Charleston, W.V.(COLUMN)43(COLUMN)22 Charlotte(COLUMN)50(COLUMN)30 Cheyenne(COLUMN)43(COLUMN)21 Chicago(COLUMN)37(COLUMN)31 Cincinnati(COLUMN)39(COLUMN)29 Cleveland(COLUMN)39(COLUMN)32 Columbus, S.C.(COLUMN)51(COLUMN)23 Columbus(COLUMN)42(COLUMN)31 Dal.-Ft. Worth(COLUMN)56(COLUMN)47 Dayton(COLUMN)38(COLUMN)13 Denver(COLUMN)50(COLUMN)26 Des Moines(COLUMN)26(COLUMN)21 Detroit(COLUMN)32(COLUMN)24 Duluth(COLUMN)16(COLUMN)10 El Paso(COLUMN)60(COLUMN)37 Fairbanks(COLUMN)-12(COLUMN)-18 Fargo(COLUMN) 6(COLUMN) 4 Flagstaff(COLUMN)41(COLUMN)33 Great Falls(COLUMN) 5(COLUMN)-3 Hartford(COLUMN)29(COLUMN)23 Helena(COLUMN)21(COLUMN)12 Honolulu(COLUMN)80(COLUMN)64 Houston(COLUMN)63(COLUMN)60 Indianapolis(COLUMN)42(COLUMN)34 Jackson, Miss.(COLUMN)58(COLUMN)38 Jacksonville(COLUMN)64(COLUMN)37 Juneau(COLUMN)24(COLUMN)38 Kansas City(COLUMN)42(COLUMN)37 Las Vegas(COLUMN)51(COLUMN)44 Little Rock(COLUMN)50(COLUMN)44 Los Angeles(COLUMN)61(COLUMN)50 Louisville(COLUMN)45(COLUMN)34 Memphis(COLUMN)51(COLUMN)41 Miami Beach(COLUMN)83(COLUMN)68 Midland-Odessa(COLUMN)57(COLUMN)36 Milwaukee(COLUMN)30(COLUMN)16 Mpls.-St. Paul(COLUMN)16(COLUMN)12 Nashville(COLUMN)50(COLUMN)35 New Orleans(COLUMN)58(COLUMN)42 New York(COLUMN)30(COLUMN)17 Norfolk(COLUMN)43(COLUMN)27 North Platte(COLUMN)27(COLUMN) 8 Oklahoma City(COLUMN)57(COLUMN)36 Omaha(COLUMN)24(COLUMN)17 Orlando(COLUMN)73(COLUMN)51 Philadelphia(COLUMN)32(COLUMN)24 Phoenix(COLUMN)69(COLUMN)51 Pittsburgh(COLUMN)36(COLUMN)29 Portland, Maine(COLUMN)25(COLUMN)16 Portland, Ore.(COLUMN)38(COLUMN)33 Providence(COLUMN)28(COLUMN)21 Raleigh(COLUMN)48(COLUMN)26 Rapid City(COLUMN)19(COLUMN) 1 Reno(COLUMN)44(COLUMN)37 Richmond(COLUMN)41(COLUMN)24 St. Louis(COLUMN)46(COLUMN)32 St. Prbg.-Tampa(COLUMN)70(COLUMN)52 Salt Lake City(COLUMN)45(COLUMN)39 San Antonio(COLUMN)59(COLUMN)42 San Diego(COLUMN)67(COLUMN)63 San Francisco(COLUMN)60(COLUMN)42 San Juan(COLUMN)85(COLUMN)70 St. Ste. Marie(COLUMN)24(COLUMN)10 Seattle(COLUMN)53(COLUMN)44 Shreveport(COLUMN)55(COLUMN)50 Sioux Falls(COLUMN)14(COLUMN)03 Spokane(COLUMN)37(COLUMN)21 Syracuse(COLUMN)34(COLUMN)31 Topeka(COLUMN)48(COLUMN)30 Tucson(COLUMN)68(COLUMN)42 Tulsa(COLUMN)55(COLUMN)47 Washington(COLUMN)37(COLUMN)28 Wichita(COLUMN)49(COLUMN)26(END TABLE) Temperatures Abroad Yesterday(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)Temp Aberdeen(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)46 Amsterdam(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)34 Ankara(COLUMN)pt. cldy.(COLUMN)3 p.m.(COLUMN)37 Athens(COLUMN)cloudy(COLUMN)2 p.m.(COLUMN)54 Auckland(COLUMN)pt. cldy(COLUMN)midnight(COLUMN)43 Berlin(COLUMN)pt. cldy(COLUMN)3 p.m.(COLUMN)30 Birmingham(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)43 Brussels(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)32 Casablanca(COLUMN)cloudy(COLUMN)noon(COLUMN)68 Copenhagen(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)32 Dublin(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)48 Geneva(COLUMN)clear(COLUMN)1 p.m.(COLUMN)34 Hong Kong(COLUMN)clear(COLUMN)8 p.m.(COLUMN)37 Lisbon(COLUMN)clear(COLUMN)noon(COLUMN)54 London(COLUMN)rain(COLUMN)1 p.m.(COLUMN)41 Madrid(COLUMN)clear(COLUMN)1 p.m.(COLUMN)50 Malta(COLUMN)rain(COLUMN)1 p.m.(COLUMN)48 Manila(COLUMN)clear(COLUMN)8 p.m.(COLUMN)75 Moscow(COLUMN)snow(COLUMN)3 p.m.(COLUMN)28 New Delhi(COLUMN)cloudy(COLUMN)5 p.m.(COLUMN)64 Nice(COLUMN)clear(COLUMN)1 p.m.(COLUMN)52 Oslo(COLUMN)snow(COLUMN)1 p.m.(COLUMN)19 Paris(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)52 Peking(COLUMN)clear(COLUMN)8 p.m.(COLUMN)36 Rome(COLUMN)clear(COLUMN)1 p.m.(COLUMN)50 Saigon(COLUMN)pt. cldy(COLUMN)8 p.m.(COLUMN)82 Stockholm(COLUMN)clear(COLUMN)1 p.m.(COLUMN)23 Sydney(COLUMN)cloudy(COLUMN)10 p.m.(COLUMN)70 Tel Aviv(COLUMN)clear(COLUMN)2 p.m.(COLUMN)59 Tokyo(COLUMN)clear(COLUMN)9 p.m.(COLUMN)43 Tunis(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)57 Vienna(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)28 Warsaw(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)27(END TABLE) Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)clear(COLUMN)87(COLUMN)73 Barbados(COLUMN)fair(COLUMN)84(COLUMN)75 Bermuda(COLUMN)fair(COLUMN)66(COLUMN)59 Bogota(COLUMN)fair(COLUMN)73(COLUMN)42 Calgary(COLUMN)snow(COLUMN)zero(COLUMN)-8 Culiacan(COLUMN)pt. cldy(COLUMN)81(COLUMN)57 Edmonton(COLUMN)snow(COLUMN)-2(COLUMN)-6 Havana(COLUMN)pt. cldy(COLUMN)75(COLUMN)70 Kingston(COLUMN)fair(COLUMN)84(COLUMN)72 Montego Bay(COLUMN)pt. cldy(COLUMN)84(COLUMN)72 Mexico City(COLUMN)haze(COLUMN)73(COLUMN)48 Monterrey(COLUMN)fair(COLUMN)48(COLUMN)48 Montreal(COLUMN)snow(COLUMN)12(COLUMN) 1 Nassau(COLUMN)fair(COLUMN)75$68 Ottawa(COLUMN)pt. cldy(COLUMN)10(COLUMN) 7 Regina(COLUMN)snow(COLUMN) 3(COLUMN)-4 St. Kitts(COLUMN)pt. cldy(COLUMN)84(COLUMN)73 Toronto(COLUMN)cloudy(COLUMN)30(COLUMN)27 Vancouver(COLUMN)rain(COLUMN)36(COLUMN)34 Veracruz(COLUMN)pt. cldy(COLUMN)68(COLUMN)61 Winnipeg(COLUMN)snow(COLUMN)-4(COLUMN)-3(END TABLE)