Washington: Today - Sunny and warm, but less humid, high near 90, low in the 60s. The chance of rain is 10 percent through tonight. Winds will be from the northwest at 5 to 15 mph. Friday - Sunny, high near 90.

Maryland and Virginia: Today - Sunny and warm, but less humid, highs in the 80s to low 90s, lows in the 60s. Friday - Sunny, high in the 80s.

Extended Area Forecast for Saturday through Monday - Fair and quite warm over the weekend with a chance of thunderstorms on Monday. Highs will average from mid 80s to mid 90s, lows from the 60s to 70s. Normal Washington temperatures are high of 87 and a low of 68.

Lower Potomac and Chesapeake Bay - Fair with visibility of 5 miles or more. Winds will be from the northwest at 10 to 18 knots. Waves will average 2 feet or less.

The National Weather Forecast for today - Scattered showers and thunderstorms will occur across the northern Rockies and southern and central Florida. Widely scattered thundershowers will occur from southern Texas along the Gulf Coast to northern Florida. Widely scattered showers may also occur across the lower Great Lakes. Mild temperatures will prevail from the northern half of the Pacific Coast across the Central and Southern Plateau regions into the Southern Rockies. Warm to hot temperatures will prevail across the rest of the nation. However, some very hot readings will be present across the lower Missouri Valley, the lower Ohio Valley and the extreme southern Appalachians.

Atlantic Ocean Beaches from New Jersey to Maryland: Today and Friday - Sunny and warm, but both days will be less humid, high near 80. Water temperatures will be in the mid to upper 80s.

Atlantic Ocean Beaches from Virginia to North Carolina: Today and Friday - Sunny and warm but less humid highs in the mid to upper 80s. Water temperatures will range from the low to mid 70s.

West Virginia: Today - Partly cloudy, highs from the 80s, to near 93, lows from the upper 50s to upper 60s.Friday - Sunny, high near 90.

The Council of Governments' Air Quality Index for yesterday showed the high reading in the Washington area during the 3 p.m. period was 50 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 remain near 3.4 feet today. Local Temp., Humidity(TABLE) Time(COLUMN)T.(COLUMN)H. 12 midnight(COLUMN)73(COLUMN)87 1 a.m.(COLUMN)73(COLUMN)87 2 a.m.(COLUMN)68(COLUMN)79 3 a.m.(COLUMN)73(COLUMN)87 4 a.m.(COLUMN)73(COLUMN)87 5 a.m.(COLUMN)74(COLUMN)85 6 a.m.(COLUMN)75(COLUMN)79 7 a.m.(COLUMN)76(COLUMN)76 8 a.m.(COLUMN)80(COLUMN)69 9 a.m.(COLUMN)85(COLUMN)61 10 a.m.(COLUMN)85(COLUMN)61 11 a.m.(COLUMN)86(COLUMN)61 12 noon(COLUMN)88(COLUMN)57 1 p.m.(COLUMN)90(COLUMN)49 2 p.m.(COLUMN)89(COLUMN)50 3 p.m.(COLUMN)91(COLUMN)46 4 p.m.(COLUMN)91(COLUMN)44 5 p.m.(COLUMN)90(COLUMN)42 6 p.m.(COLUMN)90(COLUMN)41 7 p.m.(COLUMN)89(COLUMN)42(END TABLE) Temperatures ending 8 a.m. (EDT) yesterday:(TABLE) City(COLUMN)H.(COLUMN)L. Albany(COLUMN) 88(COLUMN)65 Albuquerque(COLUMN) 90(COLUMN)64 Amarillo(COLUMN) 91(COLUMN)62 Anchorage(COLUMN) 59(COLUMN)52 Asheville(COLUMN) 91(COLUMN)66 Atlanta(COLUMN) 93(COLUMN)73 Atlantic City(COLUMN) 78(COLUMN)66 Austin(COLUMN) 97(COLUMN)73 Baltimore(COLUMN) 97(COLUMN)71 Billings(COLUMN) 80(COLUMN)61 Birmingham(COLUMN) 95(COLUMN)72 Bismarck(COLUMN) 82(COLUMN)59 Boise(COLUMN) 87(COLUMN)59 Boston(COLUMN) 87(COLUMN)70 Brownsville(COLUMN) 96(COLUMN)78 Buffalo(COLUMN) 87(COLUMN)62 Burlington, Vt.(COLUMN) 82(COLUMN)65 Casper(COLUMN) 89(COLUMN)53 Charleston, S.C.(COLUMN) 96(COLUMN)80 Charleston, W. Va.(COLUMN) 92(COLUMN)69 Charlotte(COLUMN) 96(COLUMN)74 Cheyenne(COLUMN) 77(COLUMN)52 Chicago(COLUMN) 86(COLUMN)66 Cincinnati(COLUMN) 92(COLUMN)73 Cleveland(COLUMN) 93(COLUMN)65 Columbia, S.C.(COLUMN) 96(COLUMN)72 Columbus(COLUMN) 95(COLUMN)66 Dal.-Ft. Worth(COLUMN) 97(COLUMN)74 Dayton(COLUMN) 96(COLUMN)67 Denver(COLUMN) 83(COLUMN)57 Des Moines(COLUMN) 86(COLUMN)71 Detroit(COLUMN) 89(COLUMN)61 Duluth(COLUMN) 79(COLUMN)63 El Paso(COLUMN)100(COLUMN)71 Fairbanks(COLUMN) 62(COLUMN)48 Fargo(COLUMN) 93(COLUMN)65 Flagstaff(COLUMN) 77(COLUMN)47 Great Falls(COLUMN) 79(COLUMN)51 Hartford(COLUMN) 90(COLUMN)70 Helena(COLUMN) 83(COLUMN)50 Honolulu(COLUMN) 85(COLUMN)74 Houston(COLUMN) 89(COLUMN)76 Indianapolis(COLUMN) 96(COLUMN)72 Jackson(COLUMN) 97(COLUMN)74 Jacksonville(COLUMN) 94(COLUMN)76 Juneau(COLUMN) 50(COLUMN)45 Kansas City(COLUMN) 90(COLUMN)73 Las Vegas(COLUMN) 96(COLUMN)68 Little Rock(COLUMN) 94(COLUMN)77 Louisville(COLUMN) 98(COLUMN)77 Memphis(COLUMN) 95(COLUMN)80 Miami Beach(COLUMN) 88(COLUMN)80 Midland(COLUMN) 92(COLUMN)72 Milwaukee(COLUMN) 84(COLUMN)68 Mpls.-St. Paul(COLUMN) 83(COLUMN)65 Nashville(COLUMN) 95(COLUMN)77 New Orleans(COLUMN) 92(COLUMN)72 New York(COLUMN) 87(COLUMN)75 Norfolk, Va.(COLUMN) 90(COLUMN)73 North Platte(COLUMN) 87(COLUMN)64 Oklahoma City(COLUMN) 92(COLUMN)73 Omaha(COLUMN) 86(COLUMN)72 Orlando(COLUMN) 95(COLUMN)74 Philadelphia(COLUMN) 90(COLUMN)72 Phoenix(COLUMN)106(COLUMN)79 Pittsburgh(COLUMN) 93(COLUMN)68 Portland, Me.(COLUMN) 81(COLUMN)64 Portland, Ore.(COLUMN) 90(COLUMN)60 Providence(COLUMN) 83(COLUMN)70 Raleigh(COLUMN) 95(COLUMN)73 Rapid City(COLUMN) 87(COLUMN)57 Reno(COLUMN) 79(COLUMN)44 Richmond(COLUMN) 96(COLUMN)70 St. Louis(COLUMN) 95(COLUMN)74 St. Prbg.-Tampa(COLUMN) 93(COLUMN)74 Salt Lake City(COLUMN) 91(COLUMN)59 San Antonio(COLUMN) 95(COLUMN)76 San Diego(COLUMN) 72(COLUMN)65 San Francisco(COLUMN) 65(COLUMN)59 San Juan(COLUMN) 87(COLUMN)75 St. Ste. Marie(COLUMN) 71(COLUMN)50 Seattle(COLUMN) 85(COLUMN)61 Shreveport(COLUMN) 96(COLUMN)70 Sioux Falls(COLUMN) 82(COLUMN)69 Spokane(COLUMN) 81(COLUMN)54 Syracuse(COLUMN) 91(COLUMN)65 Topeka(COLUMN) 91(COLUMN)71 Tucson(COLUMN) 99(COLUMN)73 Washington(COLUMN) 97(COLUMN)72 Wichita(COLUMN) 96(COLUMN)71(END TABLE) Temperatures Abroad Yesterday(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)Temp. Aberdeen(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN)64 Amsterdam(COLUMN)rain(COLUMN) 1 p.m.(COLUMN)55 Ankara(COLUMN)clear(COLUMN) 3 p.m.(COLUMN)88 Athens(COLUMN)clear(COLUMN) 2 p.m.(COLUMN)82 Auckland(COLUMN)rain(COLUMN)mid.(COLUMN)50 Berlin(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN)55 Birmingham(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN)66 Bonn(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN)59 Brussels(COLUMN)rain(COLUMN) 1 p.m.(COLUMN)54 Cairo(COLUMN)clear(COLUMN) 2 p.m.(COLUMN)99 Casablanca(COLUMN)pt. cldy(COLUMN)noon(COLUMN)72 Copenhagen(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN)61 Dublin(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN)64 Geneva(COLUMN)pt. cldy(COLUMN) 1 p.m.(COLUMN)59 Hong Kong(COLUMN)pt. cldy(COLUMN) 8 p.m.(COLUMN)82 Jerusalem(COLUMN)clear(COLUMN) 2 p.m.(COLUMN)91 Lisbon(COLUMN)pt. cldy(COLUMN)noon(COLUMN)77 London(COLUMN)pt. cldy(COLUMN) 1 p.m.(COLUMN)68 Madrid(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)75 Malta(COLUMN)clear(COLUMN) 1 p.m.(COLUMN) Manila(COLUMN)pt.cldy(COLUMN) 8 p.m.(COLUMN)82 Moscow(COLUMN)pt.cldy(COLUMN) 3 p.m.(COLUMN)72 New Delhi(COLUMN)cloudy(COLUMN) 5 p.m.(COLUMN)95 Nice(COLUMN)pt.cldy(COLUMN) 1 p.m.(COLUMN)70 Oslo(COLUMN)pt.cldy(COLUMN) 1 p.m.(COLUMN)73 Paris(COLUMN)rain(COLUMN) 1 p.m.(COLUMN)54 Peking(COLUMN)cloudy(COLUMN) 8 p.m.(COLUMN)84 Rome(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)73 Saigon(COLUMN)cloudy(COLUMN) 8 p.m.(COLUMN)84 Sofia(COLUMN)rain(COLUMN) 2 p.m.(COLUMN)54 Stockholm(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN)55 Sydney(COLUMN)cloudy(COLUMN)10 p.m.(COLUMN)55 Tokyo(COLUMN)cloudy(COLUMN) 9 p.m.(COLUMN)68 Tunis(COLUMN)pt.cldy(COLUMN) 1 p.m.(COLUMN)77 Vienna(COLUMN)rain(COLUMN) 1 p.m.(COLUMN)59 Warsaw(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN)64 (END TABLE) Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)pt.cldy(COLUMN)88(COLUMN)77 Barbados(COLUMN)Sunny(COLUMN)86(COLUMN)79 Bermuda(COLUMN) pt.cldy.(COLUMN)82(COLUMN)76 Calgary(COLUMN)clear(COLUMN)75(COLUMN)50 Culiacan(COLUMN)fair(COLUMN)93(COLUMN)79 Edmonton(COLUMN)cloudy(COLUMN)79(COLUMN)48 Havana(COLUMN)cloudy(COLUMN)90(COLUMN)77 Kingston(COLUMN)pt.cldy.(COLUMN)90(COLUMN)77 Montego Bay(COLUMN)pt.cldy(COLUMN)88(COLUMN)77 Mexico City(COLUMN)Pt.cldy(COLUMN)75(COLUMN)52 Monterrey(COLUMN)pt.cldy.(COLUMN)97(COLUMN)75 Montreal(COLUMN)clear(COLUMN)79(COLUMN)66 Nassau(COLUMN)Pt.cldy.(COLUMN)90(COLUMN)77 Ottawa(COLUMN)clear(COLUMN)84(COLUMN)64 Regina(COLUMN)clear(COLUMN)81(COLUMN)59 Toronto(COLUMN)clear(COLUMN)91(COLUMN)55 Vancouver(COLUMN)clear(COLUMN)73(COLUMN)61 Winnipeg(COLUMN)clear(COLUMN)84(COLUMN)55 (END TABLE)