Washington: Today - Partly cloudy with a chance of showers or thunderstorms, high near 90, low near 70. The chance of rain is 30 percent. Winds will be variable at 10 mph or less. Wednesday - Variable cloudiness, warm and humid high near 90.

Maryland and Virginia: Today and Wednesday - Variable cloudiness, warm and humid, with a chance of thunderstorms, high [WORD ILLEGIBLE] days in the 80, to near 90, lows mostly in the 60s.

Extended Area Forecast for Thursday through Saturday - Parly cloudy, warm and humid through the period with a chance of mainly afternoon and evening thunderstorms Friday and Saturday. Highs will average from the upper 80s to low 90s, low from the mid 60s to mid 70s. Normal Washington temperatures are a high of 88 and a low of 69.

West Virginia: Today - Partly cloudy, highs from the upper 70s to mid 80s, lows in the 60s. Wednesday - Partly cloudy, highs again from the upper 70s to mid 80s.

Lower Potomac and Chesapeake Bay - Chance of thunderstorms through tonight. Visiblity will be 1 to 3 miles in haze diminishing to less than 1 mile in rain. Winds will be southerly at 12 knots becoming northwesterly at 10 knots or less by nightfall. Waves will average less than 2 feet.

Atlantic Ocean Beaches from New Jersey to Maryland: Today - Chance of showers and thunderstorms, high in the upper 70s to low 80s. Wednesday - Variable cloudiness, warm and humid with a slight chance of thunderstorm, high in the mid 80s. Water temperatures will be near 70.

Atlantic Ocean Beaches of Virginia and North Carolina: Today - Chance of thunderstorms, high in the mid 80s. Wednesday - Variable cloudiness, warm and humid, with a slight chance of a thunderstorm, high in the mid 80s. Water temperatures will range from the mid 70s to near 80.

The Council of Governments' Air Quality Index for yesterday showed the high reading in the Washington area during the 3 p.m. period was 100 for the pollutant, photochemical oxidants. Index values between 100 and 249 indicate very 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 remain near 35 feet today.

The National Weather Forecast for today - Showers and thundershowers will be scattered over the eastern half of Texas across the lower half of the Mississippi Valley, the Tennessee Valley across the south and mid-Atlantic Coastal states and eastern New York. Rain will fall over New England. Widely scattered or isolated thunderstorms and showers will dot the northern Plains, the Rockies, Oklahoma and the mountains of Arizona. Sunny or partly cloudy skies will be found elsewhere. Hot weather will continue over the western sections of the Pacific Northwest, the Intermountain Region, northern California and western Kansas. It will be mild over the northern Great Plains and most of Wyoming and from the upper Ohio Valley across New England. The rest of the nation will be seasonably warm.

Almanac Data for today: The sun rises 6:09 a.m. sets 8:37 p.m.; moon rises 4:08 a.m., sets 6:35 p.m.

Tides: High 7:00 a.m. and 7:40 p.m., low 1:21 a.m. and 1:58 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 1/4), Point Lockout (7). Local Temps, Humidity(TABLE) Time(COLUMN).T.(COLUMN).H. 12 mid.(COLUMN)76(COLUMN)88 1a.m.(COLUMN)76(COLUMN)88 2 a.m.(COLUMN)76(COLUMN)88 3 a.m.(COLUMN)76(COLUMN)88 4 a.m.(COLUMN)75(COLUMN)91 5 a.m.(COLUMN)75(COLUMN)91 6 a.m.(COLUMN)75(COLUMN)91 7 a.m.(COLUMN)72(COLUMN)120 8 a.m.(COLUMN)72(COLUMN)100 9 a.m.(COLUMN)74(COLUMN)94 10 a.m.(COLUMN)75(COLUMN)94 11 a.m.(COLUMN)77(COLUMN)88 12 noon(COLUMN)78(COLUMN)85 1 p.m.(COLUMN)90(COLUMN)82 2 p.m.(COLUMN)82(COLUMN)77 3 p.m.(COLUMN)84(COLUMN)77 4 p.m.(COLUMN)86(COLUMN)72 5 p.m.(COLUMN)87(COLUMN)66 6 p.m.(COLUMN)88(COLUMN)60 7 p.m.(COLUMN)87(COLUMN)63(END TABLE) Temperatures ending 8 a.m. (EDT) yesterday:(TABLE) City(COLUMN)H.(COLUMN)L Albany(COLUMN)72(COLUMN)49 Albuquerque(COLUMN)94(COLUMN)65 Amarillo(COLUMN)92(COLUMN)64 Anchorage(COLUMN)75(COLUMN)55 Asheville(COLUMN)90(COLUMN)63 Atlanta(COLUMN)92(COLUMN)69 Atlantic City(COLUMN)80(COLUMN)68 Austin(COLUMN)96(COLUMN)71 Baltimore(COLUMN)87(COLUMN)70 Billings(COLUMN)84(COLUMN)54 Birmingham(COLUMN)94(COLUMN)72 Bismarck(COLUMN)79(COLUMN)54 Boise(COLUMN)99(COLUMN)57 Boston(COLUMN)72(COLUMN)60 Brownsville(COLUMN)88(COLUMN)79 Buffalo(COLUMN)69(COLUMN)54 Burlington, Vt.(COLUMN)66(COLUMN)47 Casper(COLUMN)54(COLUMN)58 Charleston, S.C.(COLUMN)91(COLUMN)77 Charleston, W.V.(COLUMN)80(COLUMN)65 Charlotte(COLUMN)93(COLUMN)73 Cheyenne(COLUMN)79(COLUMN)56 Chicago(COLUMN)69(COLUMN)53 Cincinnati(COLUMN)77(COLUMN)67 Cleveland(COLUMN)76(COLUMN)62 Cleveland(COLUMN)76(COLUMN)62 Columbia, S.C.(COLUMN)96(COLUMN)71 Columbus(COLUMN)74(COLUMN)65 Dal.-Ft. Worth(COLUMN)102(COLUMN)75 Dayton(COLUMN)72(COLUMN)62 Denver(COLUMN)84(COLUMN)62 Des Moines(COLUMN)79(COLUMN)63 Detroit(COLUMN)72(COLUMN)69 Duluth(COLUMN)70(COLUMN)58 El Paso(COLUMN)91(COLUMN)70 Evansville(COLUMN)92(COLUMN)64 Fairbanks(COLUMN)84(COLUMN)56 Fargo(COLUMN)78(COLUMN)53 Flagstaff(COLUMN)90(COLUMN)53 Great Falls(COLUMN)90(COLUMN)51 Hartford(COLUMN)81(COLUMN)55 Helena(COLUMN)90(COLUMN)58 Honolulu(COLUMN)86(COLUMN)73 Houston(COLUMN)90(COLUMN)72 Indianapolis(COLUMN)76(COLUMN)63 Jackson(COLUMN)93(COLUMN)76 Jacksonville(COLUMN)93(COLUMN)74 Juneau(COLUMN)78(COLUMN)68 Kansas City(COLUMN)81(COLUMN)66 Las Vegas(COLUMN)114(COLUMN)82 Little Rock(COLUMN)103(COLUMN)76 Los Angeles(COLUMN)85(COLUMN)64 Louisvillie(COLUMN)88(COLUMN)71 Memphis(COLUMN)96(COLUMN)77 Miami Beach(COLUMN)86(COLUMN)81 Midland(COLUMN)84(COLUMN)65 Milwaukuee(COLUMN)66(COLUMN)56 Mpls.- St. Paul(COLUMN)76(COLUMN)61 Nashville(COLUMN)97(COLUMN)74 New Orleans(COLUMN)95(COLUMN)77 New York(COLUMN)74(COLUMN)66 Norfolk(COLUMN)90(COLUMN)76 North Platte(COLUMN)88(COLUMN)92 Oklahoma City(COLUMN)100(COLUMN)71 Omaha(COLUMN)79(COLUMN)62 Orlando(COLUMN)90(COLUMN)74 Orlando(COLUMN)90(COLUMN)74 Philadelphia(COLUMN)86(COLUMN)68 Phoenix(COLUMN)110(COLUMN)84 Pittsburgh(COLUMN)80(COLUMN)66 Portland, Md.(COLUMN)77(COLUMN)51 Portland, Ore.(COLUMN)86(COLUMN)55 Providence(COLUMN)77(COLUMN)51 Raleigh(COLUMN)94(COLUMN)76 Rapid City(COLUMN)81(COLUMN)60 Reno(COLUMN)100(COLUMN)51 Richmond(COLUMN)92(COLUMN)73 St. Louis(COLUMN)76(COLUMN)60 St. Prbg.-Tampa(COLUMN)88(COLUMN)79 Salt Lake City(COLUMN)100(COLUMN)69 San Antonio(COLUMN)92(COLUMN)72 San Diego(COLUMN)75(COLUMN)66 San Francisco(COLUMN)67(COLUMN)54 San Juan(COLUMN)90(COLUMN)80 St. Ste. Marie(COLUMN)69(COLUMN)41 Seattle(COLUMN)83(COLUMN)52 Shreveport(COLUMN)99(COLUMN)72 Sioux Falls(COLUMN)78(COLUMN)59 Spokane(COLUMN)94(COLUMN)60 Syracuse(COLUMN)72(COLUMN)51 Topeka(COLUMN)80(COLUMN)60 Tucson(COLUMN)100(COLUMN)71 Tulsa(COLUMN)101(COLUMN)67 Washington(COLUMN)98(COLUMN)72 Wichita(COLUMN)90(COLUMN)61(END TABLE) Temperatures Abroad Yesterday(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)T. Aberdeen(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)55 Amsterdam(COLUMN)haze(COLUMN)1 p.m.(COLUMN)82 Ankara(COLUMN)clear(COLUMN)3 p.m.(COLUMN)77 Athens(COLUMN)clear(COLUMN)2 p.m.(COLUMN)84 Auckland(COLUMN)clear(COLUMN)midnight(COLUMN)45 Berlin(COLUMN)clear(COLUMN)1 p.m.(COLUMN)86 Birmingham(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)59 Bonn(COLUMN)clear(COLUMN)1 p.m.(COLUMN)86 Brussels(COLUMN)rain(COLUMN)1 p.m.(COLUMN)70 Cairo(COLUMN)pt. cldy.(COLUMN)2 p.m.(COLUMN)60 Casablancea(COLUMN)pt. cldy.(COLUMN)noon(COLUMN)72 Copenhagen(COLUMN)clear(COLUMN)1 p.m.(COLUMN)81 Dublin(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)64 Geneva(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)68 Hong Kong(COLUMN)Pt. cldy.(COLUMN)8 p.m.(COLUMN)82 London(COLUMN)rain(COLUMN)1 p.m.(COLUMN)63 Madrid(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)73 Malta(COLUMN)clear(COLUMN)1 p.m.(COLUMN)86 Manila(COLUMN)pt. cldy.(COLUMN)8 p.m.(COLUMN)82 Moscow(COLUMN)clear(COLUMN)3 p.m.(COLUMN)70 Nice(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)79 Oslo(COLUMN)clear(COLUMN)1 p.m.(COLUMN)81 Paris(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)64 Peking(COLUMN)clear(COLUMN)8 p.m.(COLUMN)75 Rome(COLUMN)clear(COLUMN)1 p.m.(COLUMN)82 Saigon(COLUMN)pt. cldy.(COLUMN)8 p.m.(COLUMN)79 Sofia(COLUMN)pt. cldy.(COLUMN)2 p.m.(COLUMN)72 Stockholm(COLUMN)clear(COLUMN)1 p.m.(COLUMN)81 Sydney(COLUMN)clear(COLUMN)10 p.m.(COLUMN)57 Tokyo(COLUMN)pt. cldy.(COLUMN)5 p.m.(COLUMN)82 Tunis(COLUMN)clear(COLUMN)1 p.m.(COLUMN)90 Vienna(COLUMN)drizzle(COLUMN)1 p.m.(COLUMN)81 Warsaw(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)81(END TABLE) Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)pt. cldy.(COLUMN)90(COLUMN)75 Barbados(COLUMN)cloudy(COLUMN)82(COLUMN)72 Bermuda(COLUMN)pt. cldy.(COLUMN)85(COLUMN)80 Bogota(COLUMN)pt. cldy.(COLUMN)67(COLUMN)40 Calgary(COLUMN)pt. cldy.(COLUMN)61(COLUMN)50 Edmonton(COLUMN)clear(COLUMN)70(COLUMN)48 Havana(COLUMN)fair(COLUMN)90(COLUMN)77 Kingston(COLUMN)pt. cldy.(COLUMN)90(COLUMN)81 Montego Bay(COLUMN)cloudy(COLUMN)90(COLUMN)75 Mexico City(COLUMN)haze(COLUMN)75(COLUMN)54 Monterrery(COLUMN)cloudy(COLUMN)96(COLUMN)76 Nassau(COLUMN)fair(COLUMN)91(COLUMN)72 St. Kitts(COLUMN)cloudy(COLUMN)88(COLUMN)75 St. Thomas(COLUMN)cloudy(COLUMN)91(COLUMN)80 Toronto(COLUMN)pt. cldy.(COLUMN)66(COLUMN)45 Veracruz(COLUMN)fair(COLUMN)90(COLUMN)77(END TABLE)