Washington: Today - Partly cloudy, high in the 70s, low in the 50s. The chance of rain is 20 percent tonight. Winds will be from the southeast at 10 mph or less. Friday - Variable cloudiness, high in the 70s.

Maryland and Virginia: Today - Variable cloudiness with a chance of evening showers, highs in the 60s. Friday - Variable cloudiness, high in the 60s to mid 70s.

Extended Area Forecast for Saturday through Monday - Partly cloudy with a chance of showers Saturday. Fair and cool Sunday and Monday. Highs will range from the upper 50s to mid 60s. Lows from the mid 30s to the mids 40s. Normal Washington temperatures are a high 73 and a low of 52. Lower Potomac and Chesapeake Bay -Fair during the day with increasing cloudiness and a chance of showers tonight. Visibility will be 1 miles or more. Winds will be from the south at 10 to 15 knots. Waves will average near 1 foot.

West Virginia: Today - Partly cloudy, high near 70, lows from the mid 40s to low 50s. Friday - Cloudy, chance of showers, high in the 40s.

The National Weather Forecast for today - Rainshowers will extend from the Great Lakes through the Ohio and Tennessee Valley and the [WORD ILLEGIBLE] Gulf Coast states. Showers will be scattered over Florida, the southern Atlantic Coast and Maine. Temperatures will remain warm over southern Florida and the southern California coast.Mild temperatures will continue over the southern half of the Atlantic Coast through the Tennessee Valley and the eastern Gulf states, as well as from much of the Pacific Coast across the southern Plateau. Elsewhere temperatures will be generally cool.

Almanac Data for today: the sun rise 7:27 a.m. sets 6:45 p.m.; moon rises 10:27 a.m., sets 9:10 p.m. Tides: high 10:42 a.m. and [WORD ILLEGIBLE] low 5:21 a.m. and 5:15 p.m. High and low tides at the following locations may be obtained by subtracting the hours indicated from the hours above: Annapolis (3 1/4), Bloody Point Lighthouse, (4 1/2), Deale, Md. (4 1/2), Colonial Beach (5 1/4), Norfolk (1), Virginia Beach (4 3/4), Solomons Islands (6 1/4), Point Lookout (7).

The Council of Government's Air Quality Index for yesterday showed the high reaching in the Washington area during the 3 p.m. period was 19 for the pollutant photochemical oxidants. Index values between 0 and 24 indicate good 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 remain about the same.

The National Weather Service forecasts the Potomac River stage at Little Falls should remain near 20 feet today. Local Temp., Humidity(TABLE) Time(COLUMN)T.(COLUMN)H. 12 mdn.(COLUMN)64(COLUMN)70 1 a.m.(COLUMN)64(COLUMN)70 2 a.m.(COLUMN)65(COLUMN)66 3 a.m.(COLUMN)65(COLUMN)68 4 a.m.(COLUMN)65(COLUMN)68 5 a.m.(COLUMN)65(COLUMN)68 6 a.m.(COLUMN)65(COLUMN)68 7a.m.(COLUMN)65(COLUMN)68 8 a.m.(COLUMN)62(COLUMN)78 9 a.m.(COLUMN)62(COLUMN)78 10 a.m.(COLUMN)62(COLUMN)78 11 a.m.(COLUMN)61(COLUMN)81 12 noon(COLUMN)61(COLUMN)81 1 p.m.(COLUMN)63(COLUMN)75 2 p.m.(COLUMN)65(COLUMN)70 3 p.m.(COLUMN)66(COLUMN)70 4 p.m.(COLUMN)68(COLUMN)66 5 p.m.(COLUMN)69(COLUMN)66 6 p.m.(COLUMN)68(COLUMN)68 7 p.m.(COLUMN)65(COLUMN)75(END TABLE) Temperatures ending 8 a.m. (EDT) yesterday(TABLE) City(COLUMN)H.(COLUMN)L. Albany(COLUMN)61(COLUMN)45 Albuquerque(COLUMN)81(COLUMN)53 Amarillo(COLUMN)70(COLUMN)50 Anchorage(COLUMN)44(COLUMN)36 Ashville(COLUMN)73(COLUMN)55 Atlanta(COLUMN)81(COLUMN)58 Atlantic City(COLUMN)66(COLUMN)61 Austin(COLUMN)87(COLUMN)66 Baltimore(COLUMN)70(COLUMN)55 Billings(COLUMN)65(COLUMN)44 Birmingham(COLUMN)82(COLUMN)60 Bismarck(COLUMN)54(COLUMN)39 Boise(COLUMN)72(COLUMN)40 Boston(COLUMN)53(COLUMN)49 Brownsville(COLUMN)92(COLUMN)71 Buffalo(COLUMN)66(COLUMN)53 Burington Vt.(COLUMN)60(COLUMN)47 Casper(COLUMN)69(COLUMN)45 Charleston, S.C.(COLUMN)81(COLUMN)70 Charleston, W.V.(COLUMN)75(COLUMN)58 Charlotte(COLUMN)74(COLUMN)59 Cheyenne(COLUMN)66(COLUMN)44 Chicago(COLUMN)67(COLUMN)40 Cincinnati(COLUMN)69(COLUMN)50 Cleveland(COLUMN)71(COLUMN)51 Columbia. S.C.(COLUMN)81(COLUMN)62 Columbus, Ohio(COLUMN)71(COLUMN)53 Dal.-Ft. Worth(COLUMN)87(COLUMN)51 Dayton(COLUMN)67(COLUMN)48 Denver(COLUMN)64(COLUMN)42 Des Moines(COLUMN)60(COLUMN)43 Detroit(COLUMN)62(COLUMN)47 Duluth(COLUMN)62(COLUMN)45 El Paso(COLUMN)83(COLUMN)56 Evansville(COLUMN)65(COLUMN)46 Fairbanks(COLUMN)30(COLUMN)19 Fargo(COLUMN)50(COLUMN)43 Flagstaff(COLUMN)78(COLUMN)36 Great Falls(COLUMN)65(COLUMN)37 Hartford(COLUMN)57(COLUMN)43 Helena(COLUMN)63(COLUMN)39 Honolulu(COLUMN)39(COLUMN)72 Houston(COLUMN)82(COLUMN)96 Indianapolis(COLUMN)65(COLUMN)45 Jackson(COLUMN)89(COLUMN)60 Jacksonville(COLUMN)84(COLUMN)64 Juneau(COLUMN)54(COLUMN)47 Kansas City(COLUMN)68(COLUMN)43 Las Vegas(COLUMN)95(COLUMN)63 Little Rock(COLUMN)77(COLUMN)53 Los Angeles(COLUMN)83(COLUMN)66 Louisville(COLUMN)65(COLUMN)54 Memphis(COLUMN)79(COLUMN)49 Miami Beach(COLUMN)80(COLUMN)76 Midland(COLUMN)73(COLUMN)54 Milwaukee(COLUMN)65(COLUMN)46 Mpls.-St. Paul(COLUMN)62(COLUMN)40 Nashville(COLUMN)74(COLUMN)54 New Orleans(COLUMN)86(COLUMN)61 New York(COLUMN)83(COLUMN)66 Norfolk(COLUMN)73(COLUMN)55 North Platte(COLUMN)68(COLUMN)28 Oklahoma City(COLUMN)80(COLUMN)51 Omaha(COLUMN)62(COLUMN)43 Orlando(COLUMN)88(COLUMN)71 Philadelphia(COLUMN)67(COLUMN)58 Phoenix(COLUMN)102(COLUMN)75 Pittsburg(COLUMN)68(COLUMN)51 Portland,Me.(COLUMN)56(COLUMN)39 Portland, Ore.(COLUMN)74(COLUMN)51 Providence(COLUMN)53(COLUMN)49 Raleigh(COLUMN)78(COLUMN)61 Rapid City(COLUMN)67(COLUMN)43 Reno(COLUMN)82(COLUMN)38 Richmond(COLUMN)74(COLUMN)40 St. Louis(COLUMN)71(COLUMN)47 St. Prbg.-Tampa(COLUMN)87(COLUMN)73 Salt Lake City(COLUMN)70(COLUMN)42 San Antonio(COLUMN)87(COLUMN)66 San Diego(COLUMN)76(COLUMN)70 San Francisco(COLUMN)70(COLUMN)52 San Juan(COLUMN)90(COLUMN)77 St. Ste. Marie(COLUMN)60(COLUMN)48 Seattle(COLUMN)64(COLUMN)49 Shreveport(COLUMN)88(COLUMN)60 Sioux Falls(COLUMN)55(COLUMN)34 Spokane(COLUMN)65(COLUMN)32 Syracuse(COLUMN)68(COLUMN)55 Topeka(COLUMN)70(COLUMN)40 Tucson(COLUMN)95(COLUMN)66 Tulsa(COLUMN)80(COLUMN)47 Washington(COLUMN)72(COLUMN)62 Wichita(COLUMN)74(COLUMN)46(END TABLE) Temperatures Abroad Yesterday(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)Temp. Aberdeen(COLUMN)pt. Cloudy(COLUMN)1 p.m.(COLUMN)54 Amsterdam(COLUMN)pt. cloudy(COLUMN)1 p.m.(COLUMN)57 Brussels(COLUMN)pt. Cldy.(COLUMN)1 p.m.(COLUMN)55 Athens(COLUMN)Clear(COLUMN)2p.m.(COLUMN)75 Auckland(COLUMN)clear(COLUMN)midnght(COLUMN)54 Berlin(COLUMN)rain(COLUMN)1 p.m.(COLUMN)48 Birmingham(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)55 Bonn(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)48 Ankara(COLUMN)clear(COLUMN)3 p.m.(COLUMN)79 Casablanca(COLUMN)pt. cldy(COLUMN)noon(COLUMN)72 Copenhagen(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)52 Dubin(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)55 Geneva(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)50 Hong Kong(COLUMN)clear(COLUMN)8 p.m.(COLUMN)79 Jerusalem(COLUMN)clear(COLUMN)2 p.m.(COLUMN)86 Lisbon(COLUMN)pt. cldy(COLUMN)noon 70 London(COLUMN)ot. cldy(COLUMN)1 p.m.(COLUMN)57 Madrid(COLUMN)clear(COLUMN)1 p.m.(COLUMN)66 Matta(COLUMN)clear(COLUMN)1 p.m.(COLUMN)73 Manila(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)82 Moscow(COLUMN)Hail(COLUMN)3 p.m.(COLUMN)36 New Delhi(COLUMN)clear(COLUMN)5 p.m.(COLUMN)91 Nice(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)66 Ohio(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)52 Paris(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)57 Peking(COLUMN)clear(COLUMN)8 p.m.(COLUMN)59 Rome(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)66 Saigon(COLUMN)rain(COLUMN)8 p.m.(COLUMN)77 Sofia(COLUMN)cloudy(COLUMN)2 p.m.(COLUMN)72 Stockholm(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)52 Sydney(COLUMN)clear(COLUMN)10 p.m.(COLUMN)59 Tokyo(COLUMN)cloudy(COLUMN)9 p.m.(COLUMN)73 Tunis(COLUMN)clear(COLUMN)1 p.m.(COLUMN)77 Vienna(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)70 Warsaw(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)61(END TABLE) Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)cloudy(COLUMN)90(COLUMN)78 Barbados(COLUMN)pt. cldy.(COLUMN)86(COLUMN)77 Bermuda(COLUMN)pt. cldy.(COLUMN)84(COLUMN)75 Havana(COLUMN)pt. cldy(COLUMN)88(COLUMN)75 Kingston(COLUMN)pt. cldy.(COLUMN)90(COLUMN)78 Montego Bay(COLUMN)clear(COLUMN)88(COLUMN)75 Mexico City(COLUMN)haze(COLUMN)87(COLUMN)55 Monterrey(COLUMN)pt. cldy(COLUMN)88(COLUMN)69 Nassau(COLUMN)pt. cldy(COLUMN)90(COLUMN)72 St. Kitts(COLUMN)fair(COLUMN)88(COLUMN)72 Vera Cruz(COLUMN)pt. cldy.(COLUMN)88(COLUMN)73(END TABLE)