Washington: Today - Sunny and indicated humid, high in the low 90s, low in the 70s. The chance of rain is 10 percent through tonight. Winds will be light and variable. Thursday - Partly cloudy, warm and humid, high in the 90s.

Maryland and Virginia - Today - Stormy with a chance of thunderstorms in the mountains highs from the mids 80s to low 90s, lows 65 to 75. Thursday - Partly cloudy, warm and humid, highs from the mid 80s to mid 90s.

Extended Area Forecast for Friday through Sunday - Partly cloudy, warm and humid with a chance of thundershowers Saturday and Sunday. Highs will range from the mid 80s to low 90s, lows in the 60s to low 70s.Normal Washington temperatures are a high of 86 and a low of 67.

Lower Potomac and Chesapeake Bay - Partly cloudy. Visibility will be 3 to 5 miles diminishing to less than 1 mile in thunderstorms. Winds will be from the southwest at 10 knots or less. Waves will average near 1 foot.

Atlantic Ocean Beaches from New Jersey to North Carolina: Today - Mostly sunny, warm and humid, high in the 80s to near 90. Thursday - Partly cloudy, continued warm and humid, high in the mid 80s to low 90s. Water temperatures will range from the low 70s to near 80.

West Virginia: Today and Thursday - Variable cloudiness, warm and humid with a chance of mainly afternoon and evening thundershowers, highs both days in the 80s, lows in the 60s.

The National Weather forecast for today - Widely scattered thundershowers will develop throughout the nation east to the Mississippi River. Showers will also spread across the Pacific Northwest. Over the northern Plains there will be sunny skies and warm temperatures. The West Coast and the Southwest will continue sunny and warm out, temperatures will be in the 100s in the desert areas. The Pacific Northwest will remain cool with showers possible. The remainder of the nation will continue to be warm.

Almanac Data for today: The sun rises 6:22 a.m., sets 8:02 p.m.; moon rises 6:36 p.m., sets 4:13 a.m., Tides: high 6:42 a.m. and 7:13 p.m., low 1:40 p.m. High and low tides at the following locations may be obtained by subtractions the hours indicated from the hours above: in Annapolis (3 1/2), Bloody Point Lighthouse (4 1/2), Deale, Md. (4 1/2), Colonial Beach (5 1/4), Norfolk (1), Virginia Beach (1/4), Solomons Island (6 1/4), Point Lookout (7).

The Council of Governments' Air Quality Index for yesterday showed the high reacting in the Washington area during the 3 p.m. period was 44 for the pollutant, photochemical oxidants. 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 remain near 4.4 feet today. Local Temps., Humidity(TABLE) Time(COLUMN)T.(COLUMN)H. 12 midnig't(COLUMN)79(COLUMN)91 1 a.m.(COLUMN)79(COLUMN)91 2 a.m.(COLUMN)78(COLUMN)94 3 a.m.(COLUMN)78(COLUMN)94 4 a.m.(COLUMN)78(COLUMN)94 5 a.m.(COLUMN)78(COLUMN)94 6 a.m.(COLUMN)78(COLUMN)94 7 a.m.(COLUMN)77(COLUMN)97 8 a.m.(COLUMN)78(COLUMN)94 9 a.m.(COLUMN)80(COLUMN)83 10 a.m.(COLUMN)82(COLUMN)82 11 a.m.(COLUMN)85(COLUMN)75 12 noon(COLUMN)86(COLUMN)72 1 p.m.(COLUMN)88(COLUMN)70 2 p.m.(COLUMN)29(COLUMN)73 3 p.m.(COLUMN)88(COLUMN)75 4 p.m.(COLUMN)88(COLUMN)78 5 p.m.(COLUMN)88(COLUMN)75 6 p.m.(COLUMN)88(COLUMN)75 7 p.m.(COLUMN)86(COLUMN)80(END TABLE) Temperatures ending 8 a.m. (EDT) yesterday:(TABLE) City(COLUMN)(COLUMN). L. Albany(COLUMN)88(COLUMN)65 Albuquerque(COLUMN)92(COLUMN)64 Amarillo(COLUMN)93(COLUMN)63 Anchorage(COLUMN)64(COLUMN)48 Asheville(COLUMN)81(COLUMN)65 Atlanta(COLUMN)89(COLUMN)71 Atlantic City(COLUMN)81(COLUMN)72 Austin(COLUMN)97(COLUMN)77 Baltimore(COLUMN)85(COLUMN)71 Billings(COLUMN)70(COLUMN)51 Birmingham(COLUMN)87(COLUMN)71 Bismarck(COLUMN)85(COLUMN)42 Boise(COLUMN)74(COLUMN)52 Boston(COLUMN)93(COLUMN)74 Brownsville(COLUMN)96(COLUMN)79 Buffalo(COLUMN)87(COLUMN)70 Burlington, Vt.(COLUMN)86(COLUMN)65 Casper(COLUMN)64(COLUMN)43 Charleston, S.C.(COLUMN)90(COLUMN)71 Charleston, W.V.(COLUMN)88(COLUMN)64 Charlotte(COLUMN)90(COLUMN)49 Cheyenne(COLUMN)69(COLUMN)47 Chicago(COLUMN)89(COLUMN)73 Cincinnati(COLUMN)34(COLUMN)61 Cleveland(COLUMN)90(COLUMN)71 Columbia, S.C.(COLUMN)90(COLUMN)71 Columbus(COLUMN)85(COLUMN)67 Dal.-Ft. Worth(COLUMN)100(COLUMN)77 Dayton(COLUMN)87(COLUMN)64 Denver(COLUMN)83(COLUMN)50 Des Moines(COLUMN)95(COLUMN)70 Detroit(COLUMN)88(COLUMN)68 Duluth(COLUMN)91(COLUMN)67 El Paso(COLUMN)98(COLUMN)73 Evansville(COLUMN)90(COLUMN)71 Fairbanks(COLUMN)65(COLUMN)56 Fargo(COLUMN)92(COLUMN)66 Flagstaff(COLUMN)77(COLUMN)39 Great Falls(COLUMN)76(COLUMN)56 Hartford(COLUMN)88(COLUMN)63 Helena(COLUMN)71(COLUMN)53 Honolulu(COLUMN)91(COLUMN)74 Houston(COLUMN)92(COLUMN)71 Indianapolis(COLUMN)87(COLUMN)70 Jackson(COLUMN)89(COLUMN)70 Jacksonville(COLUMN)91(COLUMN)71 Juneau(COLUMN)58(COLUMN)52 Kansas City(COLUMN)94(COLUMN)79 Las Vegas(COLUMN)98(COLUMN)74 Little Rock(COLUMN)95(COLUMN)73 Los Angeles(COLUMN)81(COLUMN)64 Louisville(COLUMN)87(COLUMN)71 Memphis(COLUMN)90(COLUMN)75 Miami Beach(COLUMN)87(COLUMN)81 Midland(COLUMN)97(COLUMN)75 Milwaukee(COLUMN)84(COLUMN)67 Mpls.-St. Paul(COLUMN)96(COLUMN)71 Nashville(COLUMN)87(COLUMN)71 New Orleans(COLUMN)87(COLUMN)71 New York(COLUMN)92(COLUMN)74 Norfolk(COLUMN)87(COLUMN)75 North Platte(COLUMN)91(COLUMN)54 Oklahoma City(COLUMN)101(COLUMN)83 Omaha(COLUMN)93(COLUMN)67 Orlando(COLUMN)92(COLUMN)75 Philadelphia(COLUMN)90(COLUMN)74 Phoenix(COLUMN)103(COLUMN)77 Pittsburgh(COLUMN)85(COLUMN)69 Portland, Me.(COLUMN)91(COLUMN)63 Portland, Ore.(COLUMN)75(COLUMN)63 Raleigh(COLUMN)90(COLUMN)70 Rapid City(COLUMN)76(COLUMN)54 Reno(COLUMN)81(COLUMN)42 Richmond(COLUMN)90(COLUMN)74 St. Louis(COLUMN)92(COLUMN)75 St. Prbg.-Tampa(COLUMN)91(COLUMN)78 Salt Lake City(COLUMN)68(COLUMN)49 San Antonio(COLUMN)94(COLUMN)76 San Diego(COLUMN)78(COLUMN)68 San Francisco(COLUMN)73(COLUMN)54 San Juan(COLUMN)86(COLUMN)75 St. Ste. Marie(COLUMN)86(COLUMN)62 Seattle(COLUMN)65(COLUMN)39 Shreveport(COLUMN)97(COLUMN)75 Sioux Falls(COLUMN)91(COLUMN)64 Spokane(COLUMN)72(COLUMN)56 Syracuse(COLUMN)88(COLUMN)67 Topeka(COLUMN)95(COLUMN)74 Tucson(COLUMN)96(COLUMN)70 Tulsa(COLUMN)104(COLUMN)82 Washington(COLUMN)90(COLUMN)77 Wichita(COLUMN)101(COLUMN)72(END TABLE) Temperatures Abroad Yesterday(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)Temp. Aberdeen(COLUMN)rain(COLUMN)1 p.m.(COLUMN)63 Amsterdam(COLUMN)clear(COLUMN)1 p.m.(COLUMN)77 Ankara(COLUMN)clear(COLUMN)3 p.m.(COLUMN)75 Athens(COLUMN)clear(COLUMN)2 p.m.(COLUMN)84 Auckland(COLUMN)clear(COLUMN)midnight(COLUMN)54 Berlin(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)77 Birmingham(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)66 Bonn(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)77 Brussels(COLUMN)clear(COLUMN)1 p.m.(COLUMN)78 Casablanca(COLUMN)cloudy(COLUMN)noon(COLUMN)73 Copenhagen(COLUMN)clear(COLUMN)1 p.m.(COLUMN)70 Dublin(COLUMN)rain(COLUMN)1 p.m.(COLUMN)59 Geneva(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)72 Hong Kong(COLUMN)pt. cldy.(COLUMN)8 p.m.(COLUMN)84 Jerusalem(COLUMN)pt. cldy.(COLUMN)2 p.m.(COLUMN)77 Lisbon(COLUMN)clear(COLUMN)noon(COLUMN)75 London(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)70 Madrid(COLUMN)clear(COLUMN)1 p.m.(COLUMN)90 Malta(COLUMN)clear(COLUMN)1 p.m.(COLUMN)81 Manila(COLUMN)rain(COLUMN)8 p.m.(COLUMN)77 New Delhi(COLUMN)rain(COLUMN)5 p.m.(COLUMN)77 Nice(COLUMN)clear(COLUMN)1 p.m.(COLUMN)77 Oslo(COLUMN)rain(COLUMN)1 p.m.(COLUMN)59 Paris(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)75 Peking(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)72 Rome(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)72 Rome(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)81 Saigon(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)84 Sofia(COLUMN)rain(COLUMN)2 p.m.(COLUMN)72 Stockholm(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)61 Sydney(COLUMN)clear(COLUMN)10 p.m.(COLUMN)50 Tokyo(COLUMN)cloudy(COLUMN)9 p.m.(COLUMN)86 Tunis(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)88 Vienna(COLUMN)clear(COLUMN)1 p.m.(COLUMN)77 Warsaw(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)72(END TABLE) Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)fair(COLUMN)90(COLUMN)79 Barbados(COLUMN)r ain(COLUMN)86(COLUMN)74 Bermuda(COLUMN)cloudy(COLUMN)86(COLUMN)79 Calgary(COLUMN)clear(COLUMN)72(COLUMN)50 Culiacan(COLUMN)clear(COLUMN)94(COLUMN)79 Edmonton(COLUMN)clear(COLUMN)73(COLUMN)41 Havana(COLUMN)fair(COLUMN)88(COLUMN)77 Kingston(COLUMN)cloudy(COLUMN)90(COLUMN)81 Montego Bay(COLUMN)cloudy(COLUMN)90(COLUMN)75 Mexico City(COLUMN)cloudy(COLUMN)73(COLUMN)55 Monterrey(COLUMN)sunny(COLUMN)91(COLUMN)73 Montreal(COLUMN)83(COLUMN)61 Ottawa(COLUMN)clear(COLUMN)88(COLUMN)68 Regina(COLUMN)clear(COLUMN)72(COLUMN)48 St. Kitts(COLUMN)rain(COLUMN)89(COLUMN)78 St. Thomas(COLUMN)fair(COLUMN)84(COLUMN)78 Toronto(COLUMN)cloudy(COLUMN)90(COLUMN)70 Vancouver(COLUMN)cloudy(COLUMN)61(COLUMN)57 Veracruz(COLUMN)cloudy(COLUMN)91(COLUMN)73 Winnipeg(COLUMN)cloudy(COLUMN)77(COLUMN)57(END TABLE)