Washington: Today - Sunny and warmer, high near 90, low in the 60s. The chance of rain is near zero through tonight. Winds will be light and variable. Thursday - Sunny, high in the 90s.

Maryland and Virginia: Today - Sunny and warmer, high in the 80s to near 90, low in the 60s. Wednesday - Sunny, high from the mid 80s to mid 90s.

Extended Area Forecast for Friday through Sunday - Partly cloudy and warm Friday with a chance of thunderstorms, high will be in the mid 80s to low 90s, lows in the 60s to mid 70s. Clear and cooler over the weekend, highs in the 70s, lows in the 50s to low 60s. Normal Washington temperatures are a high of 82 and a low 64.

Lower Potomac and Chesapeake Bay - Fair with visibility of 5 miles or more. Winds will be southerly at 10 knots shifting to the southwest at 8 to 15 knots by evening. Waves will average near 1 foot.

The national Weather Forecast for today - Showers with some thundershowers will be scattered from the Pacific Coast across the Intermountain Region to the Rockies, across southern New Mexico and the southern half of Texas. There will be scattered thunderstorms over the Gulf region and Florida. Sunny will dominate from the Great Plains to the Atlantic Coast. Mild weather will continue over the Pacific Coast states, Idaho and Nevada. Hot temperatures will prevail over most of the Great Plains, Iowa and Missouri. Elsewhere seasonably warm temperatures will prevail.

Almanac Data for today: The sunrises 6.41 a.m., 7:31 p.m.; moon rises 10:29 a.m., sets 9:49. Tides high 11:05 a.m. and 11:30 p.m., low 5:44 a.m. and 5:40 p.m. High and low tides at the following locations may be obtained by substracting 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 Lookout (7).

The Council of Governments' Air Quality Index for yesterday showed the high reading in the Washington area during the 3 p.m. period was 36 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 remain fair.

The National Weather Service forecasts the Potomac River Stage at Little Falls should remain near 3.5 feet today. Local Temps., Humidity(TABLE) Time(COLUMN)T.(COLUMN)H. 12 midnight(COLUMN)73(COLUMN)76 1 a.m.(COLUMN)71(COLUMN)82 2 a.m.(COLUMN)69(COLUMN)87 3 a.m.(COLUMN)67(COLUMN)90 4 a.m.(COLUMN)66(COLUMN)93 5 a.m.(COLUMN)66(COLUMN)93 6 a.m.(COLUMN)66(COLUMN)87 7 a.m.(COLUMN)65(COLUMN)90 8 a.m.(COLUMN)68(COLUMN)81 9 a.m.(COLUMN)72(COLUMN)74 10 a.m.(COLUMN)76(COLUMN)64 11 a.m.(COLUMN)78(COLUMN)60 12 noon(COLUMN)81(COLUMN)53 1 p.m.(COLUMN)83(COLUMN)46 2 p.m.(COLUMN)85(COLUMN)39 3 p.m.(COLUMN)86(COLUMN)35 4 p.m.(COLUMN)87(COLUMN)36 5 p.m.(COLUMN)87(COLUMN)38 6 p.m.(COLUMN)86(COLUMN)39 7 p.m.(COLUMN)83(COLUMN)44(END TABLE) Temperatures ending 8 a.m. (EDT) yesterday:(TABLE) City(COLUMN)H.(COLUMN)L. Albany(COLUMN) 76(COLUMN) 52 Albuquerque(COLUMN) 89(COLUMN) 62 Amarillo(COLUMN) 85(COLUMN) 60 Anchorage(COLUMN) 65(COLUMN) 54 Asheville(COLUMN) 84(COLUMN) 57 Atlanta(COLUMN) 90(COLUMN) 68 Atlantic City(COLUMN) 77(COLUMN) 57 Austin(COLUMN) 95(COLUMN) 72 Baltimore(COLUMN) 82(COLUMN) 57 Billings(COLUMN) 99(COLUMN) 61 Birmingham(COLUMN) 93(COLUMN) 68 Bismarck(COLUMN)100(COLUMN) 56 Boise(COLUMN) 93(COLUMN) 68 Boston(COLUMN) 78(COLUMN) 62 Brownsville(COLUMN) 92(COLUMN) 74 Buffalo(COLUMN) 71(COLUMN) 59 Burlington, Vt.(COLUMN) 70(COLUMN) 54 Casper(COLUMN) 93(COLUMN) 53 Charleston, S.C.(COLUMN) 88(COLUMN) 75 Charleston, W.V.(COLUMN) 78(COLUMN) 55 Charlotte(COLUMN) 85(COLUMN) 67 Cheyenne(COLUMN) 89(COLUMN) 54 Chicago(COLUMN) 82(COLUMN) 61 Cincinnati(COLUMN) 79(COLUMN) 55 Cleveland(COLUMN) 72(COLUMN) 51 Columbia, S.C.(COLUMN) 88(COLUMN) 66 Columbus(COLUMN) 76(COLUMN) 53 Dal.-Ft. Worth(COLUMN)101(COLUMN) 69 Dayton(COLUMN) 75(COLUMN) 50 Denver(COLUMN) 94(COLUMN) 57 Des Moines(COLUMN) 87(COLUMN) 60 Detroit(COLUMN) 82(COLUMN) 60 Duluth(COLUMN) 88(COLUMN) 69 El Paso(COLUMN) 89(COLUMN) 67 Fairbanks(COLUMN) 68(COLUMN) 52 Fargo(COLUMN) 96(COLUMN) 69 Flagstaff(COLUMN) 82(COLUMN) 49 Great Falls(COLUMN) 93(COLUMN) 64 Hartford(COLUMN) 78(COLUMN) 52 Helena(COLUMN) 91(COLUMN) 58 Honolulu(COLUMN) 88(COLUMN) 74 Houston(COLUMN) 88(COLUMN) 77 Indianapolis(COLUMN) 82(COLUMN) 55 Jackson(COLUMN) 92(COLUMN) 66 Juneau(COLUMN) 67(COLUMN) 41 Kansas City(COLUMN) 93(COLUMN) 67 Las Vegas(COLUMN)102(COLUMN) 79 Little Rock(COLUMN) 90(COLUMN) 71 Los Angeles(COLUMN) 90(COLUMN) 73 Louisville(COLUMN) 82(COLUMN) 59 Memphis(COLUMN) 90(COLUMN) 71 Miami Beach(COLUMN) 87(COLUMN) 76 Midland(COLUMN) 81(COLUMN) 65 Milwaukee(COLUMN) 79(COLUMN) 57 Mpls.-St. Paul(COLUMN) 89(COLUMN) 66 Nashville(COLUMN) 90(COLUMN) 63 New Orleans(COLUMN) 89(COLUMN) 69 Norfolk(COLUMN) 82(COLUMN) 67 North Platte(COLUMN) 97(COLUMN) 55 Oklahoma City(COLUMN)102(COLUMN) 70 Omaha(COLUMN) 90(COLUMN) 66 Orlando(COLUMN) 90(COLUMN) 60 Philadelphia(COLUMN) 81(COLUMN) 60 Phoenix(COLUMN)101(COLUMN) 85 Pittsburgh(COLUMN) 74(COLUMN) 51 Portland, Me.(COLUMN) 80(COLUMN) 50 Portland, Or.(COLUMN) 62(COLUMN) 56 Providence(COLUMN) 77(COLUMN) 54 Raleigh(COLUMN) 85(COLUMN) 64 Rapid City(COLUMN)100(COLUMN) 61 Reno(COLUMN) 85(COLUMN) 62 Richmond(COLUMN) 86(COLUMN) 63 St. Louis(COLUMN) 88(COLUMN) 58 St. Prbg.-Tmpa(COLUMN) 89(COLUMN) 72 Salt Lake City(COLUMN) 95(COLUMN) 75 San Antonio(COLUMN) 92(COLUMN) 69 San Diego(COLUMN) 83(COLUMN) 72 San Francisco(COLUMN) 74(COLUMN) 58 San Juan(COLUMN) 91(COLUMN) 75 St. Ste. Marie(COLUMN) 77(COLUMN) 54 Seattle(COLUMN) 63(COLUMN) 54 Shreveport(COLUMN) 93(COLUMN) 66 Sioux Falls(COLUMN) 88(COLUMN) 68 Spokane(COLUMN) 76(COLUMN) 55 Syracuse(COLUMN) 72(COLUMN)59 Topeka(COLUMN) 96(COLUMN) 62 Tucson(COLUMN) 95(COLUMN) 74 Tulsa(COLUMN)105(COLUMN) 75 Washington(COLUMN) 85(COLUMN) 65 Wichita(COLUMN)102(COLUMN) 69 Evansville(COLUMN) 82(COLUMN) 58(END TABLE) Temperatures Abroad Yesterday(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)Temp. Aberdeen(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN)55 Amsterdam(COLUMN)pt. cldy.(COLUMN) 1 p.m.(COLUMN)59 Ankara(COLUMN)clear(COLUMN) 3 p.m.(COLUMN)73 Athens(COLUMN)clear(COLUMN) 2 p.m.(COLUMN)82 Berlin(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN)54 Birmingham(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN)61 Bonn(COLUMN)pt. Cldy.(COLUMN) 1 p.m.(COLUMN)59 Brussels(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)63 Casablanca(COLUMN)pt. cldy.(COLUMN)noon(COLUMN)73 Copenhagen(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)61 Dublin(COLUMN)rain(COLUMN) 1 p.m.(COLUMN)59 Geneva(COLUMN)pt. cldy.(COLUMN) 1 p.m.(COLUMN)70 Hong Kong(COLUMN)pt. cldy.(COLUMN) 8 p.m.(COLUMN)82 Jerusalem(COLUMN)pt. cldy.(COLUMN) 2 p.m.(COLUMN)79 Lisbon(COLUMN)rain(COLUMN)noon(COLUMN)72 London(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN)66 Madrid(COLUMN)pt. cldy(COLUMN) 1 p.m.(COLUMN)75 Malta(COLUMN)pt. cldy.(COLUMN) 1 p.m.(COLUMN)84 Manila(COLUMN)pt. cldy.(COLUMN) 8 p.m.(COLUMN)77 Moscow(COLUMN)cloudy(COLUMN) 3 p.m.(COLUMN)54 New Delhi(COLUMN)pt. cldy.(COLUMN) 5 p.m.(COLUMN)91 Nice(COLUMN)rain(COLUMN) 1 p.m.(COLUMN)68 Oslo(COLUMN)pt. cldy.(COLUMN) 1 p.m.(COLUMN)61 Paris(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)70 Peking(COLUMN)rain(COLUMN) 8 p.m.(COLUMN)66 Rome(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN)75 Saigon(COLUMN)cloudy(COLUMN) 8 p.m.(COLUMN)86 Sofia(COLUMN)cloudy(COLUMN) 2 p.m.(COLUMN)68 Stockholm(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN)59 Sydney(COLUMN)clear(COLUMN)10 p.m.(COLUMN)57 Tokyo(COLUMN)rain(COLUMN) 9 p.m.(COLUMN)68 Tunis(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)88 Vienna(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)70 Warsaw(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN)57(END TABLE) Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)fair(COLUMN)86(COLUMN)72 Barbados(COLUMN)clear(COLUMN)87(COLUMN)81 Bermuda(COLUMN)pt. cldy.(COLUMN)85(COLUMN)75 Bogota(COLUMN)cloudy(COLUMN)67(COLUMN)45 Calgary(COLUMN)rain(COLUMN)70(COLUMN)45 Culiacan(COLUMN)cloudy(COLUMN)95(COLUMN)75 Edmonton(COLUMN)cloudy(COLUMN)61(COLUMN)48 Havana(COLUMN)pt. cldy.(COLUMN)86(COLUMN)73 Kingston(COLUMN)cloudy(COLUMN)90(COLUMN)79 Montego Bay(COLUMN)cloudy(COLUMN)86(COLUMN)73 Mexico City(COLUMN)68(COLUMN)55 Monterray(COLUMN)cloudy(COLUMN)90(COLUMN)72 Montreal(COLUMN)pt. cldy.(COLUMN)70(COLUMN)52 Nassau(COLUMN)cloudy(COLUMN)85(COLUMN)73 Ottawa(COLUMN)clear(COLUMN)73(COLUMN)55 Regina(COLUMN)pt. cldy.(COLUMN)95(COLUMN)61 St.Kitts(COLUMN)pt. cldy.(COLUMN)90(COLUMN)77 St. Thomas(COLUMN)fair(COLUMN)88(COLUMN)75 Toronto(COLUMN)pt. cldy.(COLUMN)79(COLUMN)55 Veracruz(COLUMN)rain(COLUMN)80(COLUMN)72 Winnipeg(COLUMN)pt. cldy.(COLUMN)88(COLUMN)57(END TABLE)