Washington: Today - Cloudy, high in the low 80s, low in the mid 60s. The chance of rain is is 20 percent through tonight. Winds will be from the northeast at 15 mph. Sunday - Cloudy, high in the low 80s.

Maryland and Virginia: Today - Cloudy, high in the mid 80s, low in the low 60s. Sunday - Cloudy, high in the mid 80s.

Lower Potomac and Chesapeake Bay: Today - Fair, visibility of more than 5 miles. Winds will be from northeast at 15 knots. Waves in unprotected waters will be 2 feet.

Extended Area Outlook for Monday through Wednesday: Partly clouy, highs in the 80s, lows in the 60s through the period. Normal Washington temperatures for the period are a high of 80 and a low of 60.

Almanac Data for today: The sun rises 5:47 a.m., sets 8:24 p.m.; moon sets 11:17 a.m. Tides: high 12:54 p.m., low 7:18 a.m. and 7:55 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 (3/4), Solomons Island (6 3/4), Point Lookout (7).

The National Weather Forecast for today - Scattered Showers and thunderstorms will fall from Oklahoma and the Texas Panhandle across the central Plains, most of the middle Mississippi Valley and the western and northern Great Lakes region. Showers will also be widely scattered in the remainder of the west and in south Texas, Florida and Georgia, north over the Tennessee and the lower Ohio valley. Showers will be widely scattered from the Pacific northwest across Idaho, through Montana, Wyoming, Colorado and northern Utah. Most skies elsewhere will be sunny. Cool temperatures will continue over the northern Rockies and the northern half of the intermountain region. It will be mild from California across the south and central Rockies and the Great Plains. The rest of the country will be warm with hot weather over the upper Great Lakes region and most of New York.

The Council of Governments' Air Quality Index for yesterday showed the high reading in the Washington area during the 2 to 3 p.m. period was 90 for the pollutant, photochemical oxidants. Index values between 50 and 99 indicate unhealthy 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 4.7 feet today. Local Temps., Humidity(TABLE) Time(COLUMN)T.(COLUMN)H. . 12 mid.(COLUMN)71(COLUMN)76 1 a.m.(COLUMN)69(COLUMN)81 2 a.m.(COLUMN)68(COLUMN)81 3 a.m.(COLUMN)68(COLUMN)68 4 a.m.(COLUMN)67(COLUMN)65 5 a.m.(COLUMN)66(COLUMN)70 6 a.m.(COLUMN)65(COLUMN)68 7 a.m.(COLUMN)68(COLUMN)61 8 a.m.(COLUMN)72(COLUMN)55 9 a.m.(COLUMN)76(COLUMN)47 10 a.m.(COLUMN)78(COLUMN)45 11 a.m.(COLUMN)79(COLUMN)47 12 noon(COLUMN)81(COLUMN)47 1 p.m.(COLUMN)84(COLUMN)43 2 p.m.(COLUMN)86(COLUMN)43 3 p.m.(COLUMN)88(COLUMN)37 4 p.m.$87(COLUMN)38 5 p.m.(COLUMN)85(COLUMN)43 6 p.m.(COLUMN)83(COLUMN)50 7 p.m.(COLUMN)81(COLUMN)51(END TABLE) Temperatures ending 8 a.m. (EDT) yesterday:(TABLE) City(COLUMN)H.(COLUMN)L. Albany(COLUMN)80(COLUMN)50 Albuquerque(COLUMN)83(COLUMN)46 Amarillo(COLUMN)85(COLUMN)58 Anchorage(COLUMN)62(COLUMN)48 Asheville(COLUMN)83(COLUMN)56 Atlanta(COLUMN)89(COLUMN)66 Atlantic City(COLUMN)64(COLUMN)55 Austin(COLUMN)87(COLUMN)74 Baltimore(COLUMN)83(COLUMN)64 Billings(COLUMN)74(COLUMN)41 Birmingham(COLUMN)88(COLUMN)69 Bismarck(COLUMN)80(COLUMN)59 Boise(COLUMN)59(COLUMN)41 Boston(COLUMN)59(COLUMN)57 Brownsville(COLUMN)94(COLUMN)78 Buffalo(COLUMN)74(COLUMN)55 Burlington(COLUMN)82(COLUMN)54 Casper(COLUMN)75(COLUMN)42 Charleston, S.C.(COLUMN)93(COLUMN)73 Christn., W.Va.(COLUMN)82(COLUMN)54 Charlotte(COLUMN)88(COLUMN)63 Cheyenne(COLUMN)73(COLUMN)44 Chicago(COLUMN)84(COLUMN)67 Cincinnati(COLUMN)80(COLUMN)58 Cleveland(COLUMN)79(COLUMN)53 Columbia, S.C.(COLUMN)89(COLUMN)61 Columbus(COLUMN)80(COLUMN)56 Dal.-Ft. Worth(COLUMN)90(COLUMN)71 Dayton(COLUMN)80(COLUMN)59 Denver(COLUMN)80(COLUMN)47 Des Moines(COLUMN)88(COLUMN)69 Detroit(COLUMN)85(COLUMN)56(KEY OFF)Duluth 81(COLUMN)55 El Peso(COLUMN)89(COLUMN)55 Fairmatics(COLUMN)59(COLUMN)41 Fargo(COLUMN)86(COLUMN)72 Flagstaff(COLUMN)62(COLUMN)28 Great Falls(COLUMN)60(COLUMN)42 Hartarts(COLUMN)73(COLUMN)46 Helera(COLUMN)59(COLUMN)33 Honolulu(COLUMN)83(COLUMN)74 Houston(COLUMN)86(COLUMN)75 Indianapolis(COLUMN)84(COLUMN)66 Jackson, Miss.(COLUMN)88(COLUMN)66 Jacksonville(COLUMN)89(COLUMN)69 Juneau(COLUMN)55(COLUMN)44 Kansas City(COLUMN)86(COLUMN)67 Las Vegas(COLUMN)84(COLUMN)56 Little Rock(COLUMN)90(COLUMN)68 Los Angeles(COLUMN)70(COLUMN)55 Louisvile(COLUMN)86(COLUMN)63 Mempths(COLUMN)91(COLUMN)71 Miami Beach(COLUMN)83(COLUMN)80 Midamu-Odessa(COLUMN)87(COLUMN)63 Milwalkee(COLUMN)75(COLUMN)61 Mols. St. Paul(COLUMN)84(COLUMN)69 Nastsvile(COLUMN)92(COLUMN)66 New Orleans(COLUMN)90(COLUMN)69 New York(COLUMN)72(COLUMN)42 Norfolk(COLUMN)80(COLUMN)57 North Platte(COLUMN)84(COLUMN)59 Okla. City(COLUMN)87(COLUMN)62 Omaha(COLUMN)68(COLUMN)66 Orlando(COLUMN)96(COLUMN)70 Philadelphia(COLUMN)78(COLUMN)59 Phoenix(COLUMN)87(COLUMN)62 Pittsburgh(COLUMN)83(COLUMN)54 Portland, Me.(COLUMN)66(COLUMN)52 Portland, Ore.(COLUMN)61(COLUMN)51 Providence(COLUMN)59(COLUMN)57 Raleigh(COLUMN)86(COLUMN)57 Rapid City(COLUMN)74(COLUMN)55 Reno(COLUMN)61(COLUMN)34 Richmond(COLUMN)86(COLUMN)61 St. Louis(COLUMN)89(COLUMN)67 St. Prbg.-Tampa(COLUMN)89(COLUMN)73 Salt Lake City(COLUMN)65(COLUMN)41 San Antonio(COLUMN)87(COLUMN)75 San Diego(COLUMN)68(COLUMN)58 San Francisco(COLUMN)60(COLUMN)51 San Juan(COLUMN)86(COLUMN)73 St. Ste. Marie(COLUMN)85(COLUMN)53 Seattle(COLUMN)61(COLUMN)50 Shreveport(COLUMN)90(COLUMN)68 Sioux Falls(COLUMN)87(COLUMN)67 Spokane(COLUMN)60(COLUMN)41 Syracuse(COLUMN)79(COLUMN)50 Topeka(COLUMN)88(COLUMN)63 Tucson(COLUMN)88(COLUMN)58 Tulsa(COLUMN)90(COLUMN)89 Washington(COLUMN)88(COLUMN)65 Wichita(COLUMN)89(COLUMN)65(END TABLE) Temperatures Abroad Yesterday(TABLE) $ City(COLUMN)Weather(COLUMN)Time(COLUMN)Temp Aberdeen(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN) 66 Amsterdam(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN) 57 Ankara(COLUMN)pt. Cldy.(COLUMN) 3 p.m.(COLUMN) 73 Athens(COLUMN)clear(COLUMN) 2 p.m.(COLUMN) 81 Auckland(COLUMN)clear(COLUMN)12 a.m.(COLUMN) 50 Berlin(COLUMN)clear(COLUMN) 1 p.m.(COLUMN) 68 Birmingham(COLUMN)clear(COLUMN) 1 p.m.(COLUMN) 66 Bonn(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN) 63 Brussets(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN) 55 Cairo(COLUMN)clear(COLUMN) 2 p.m.(COLUMN)104 Casablanca(COLUMN)clear(COLUMN)12 p.m.(COLUMN) 68 Copenhagen(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)64 Dublin(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN) 61 Geneva(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)63 Hong Kong(COLUMN)rain(COLUMN) 8 p.m.(COLUMN) 75 Jersalem(COLUMN)clear(COLUMN) 2 p.m.(COLUMN) 86 Lisbon(COLUMN)pt. cldy.(COLUMN)12 p.m.(COLUMN) 68 London(COLUMN)clear(COLUMN) 1 p.m.(COLUMN) 63 Madrid(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN) 59 Malta(COLUMN)clear(COLUMN) 1 p.m.(COLUMN) 73 Manila(COLUMN)cloudy(COLUMN) 8 p.m.(COLUMN) 84 Moscow(COLUMN)pt. cldy.(COLUMN) 3 p.m.(COLUMN) 68 New Delhi(COLUMN)clear(COLUMN) 5 p.m.(COLUMN)108 Nice(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN) 66 Oslo(COLUMN)pt. cldy.(COLUMN) 1 p.m.(COLUMN) 70 Paris(COLUMN)clear(COLUMN) 1 p.m.(COLUMN) 59 Peking(COLUMN)clear(COLUMN) 8 p.m.(COLUMN) 79 Rome(COLUMN)rain(COLUMN) 1 p.m.(COLUMN) 66 Saigon(COLUMN)rain(COLUMN) 8 p.m.(COLUMN) 77 Sofia(COLUMN)pt. cldy.(COLUMN) 2 p.m.(COLUMN) 66 Stockholm(COLUMN)pt. cldy.(COLUMN) 1 p.m.(COLUMN) 73 Sydney(COLUMN)clear(COLUMN)10 p.m.(COLUMN) 59 Tokyo(COLUMN)clear(COLUMN) 9 p.m.(COLUMN) 70 Tunis(COLUMN)clear(COLUMN) 1 p.m.(COLUMN) 70 Vienna(COLUMN)clear(COLUMN) 1 p.m.(COLUMN) 63(END TABLE) Temperatures (Western Hemisphere)(TABLE) $ City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)sunny(COLUMN)93(COLUMN)77 Barbados(COLUMN)sunny(COLUMN)88(COLUMN)79 Bermuda(COLUMN)rain(COLUMN)78(COLUMN)74 Calgary(COLUMN)pt. cldy.(COLUMN)55(COLUMN)37 Culiacan(COLUMN)fair(COLUMN)95(COLUMN)65 Edmonton(COLUMN)rain(COLUMN)46(COLUMN)41 Havana(COLUMN)rain(COLUMN)86(COLUMN)74 Kingston(COLUMN)fair(COLUMN)88(COLUMN)77 Montego Bay(COLUMN)fair(COLUMN)88(COLUMN)74 Mexico City(COLUMN)pt. cldy.(COLUMN)81(COLUMN)50 Monterrey(COLUMN)cloudy(COLUMN)93(COLUMN)72 Montreal(COLUMN)clear(COLUMN)82(COLUMN)55 Nassau(COLUMN)rain(COLUMN)88(COLUMN)74 Ottawa(COLUMN)pt. cldy.(COLUMN)86(COLUMN)59 Regina(COLUMN)clear(COLUMN)72(COLUMN)45 St. Kitts(COLUMN)pt. cldy.(COLUMN)83(COLUMN)74 Toronto(COLUMN)pt. cldy.(COLUMN)81(COLUMN)52 Vancouver(COLUMN)cloudy(COLUMN)61(COLUMN)50 Veracruz(COLUMN)cloudy(COLUMN)91(COLUMN)77 Winnipeg(COLUMN)cloudy(COLUMN)81(COLUMN)54(END TABLE)(KEYWORD)