Washington: Today and Thursday - Mostly sunny and hot, high near 90, low near 65. The chance of rain is near zero through tonight. Winds will be light and variable.

Maryland and Virginia: Today - Sunny and warm, high in the 80s to near 90, low in the 60s, in the 50s in the mountains. Thursday - Some cloudiness and hot, highs again in the 80s to near 90.

Extended Area Forecast for Friday through Sunday - Quite warm through the period with a chance of showers Friday and Saturday. Highs will average in the 80s to low 90s, lows mostly in the 60s. Normal Washington temperatures are a high of 85 and a low of 66.

Lower Potomac and Chesapeake Bay - Fair with visibility of 5 miles or more. Winds will be variable at up to 10 knots. Waves will average 1 foot or less.

Atlantic Ocean Beaches from New Jersey to North Carolina: Today - Sunny, high in the low 80s. Thursday - Partly cloudy, high in the low to mid 80s. Water temperatures range from the low 70s in the north to near 80 in the south.

West Virginia: Today - Sunny, high in the 80s, low in the mid 50s to low 60s with readings in the 40s in the northern mountains. Thursday - Sunny, high in the 80s.

The national weather forecast for today - Mild temperatures will continue over the northern Rockies and west to the Pacific Coast. The remainder of the Rockies and most of the country east to the Atlantic Cost will be seasonably warm. The main exception will be the eastern portions of the Great Plains, parts of the mid and upper Mississippi Valley and portions of the Great Lakes region where hot weather will persist. Scattered thundershowers will develop over mids of Texas, southern portions of the Gulf Coast states and all of Florida. Showers will be scattered from the upper Mississippi Valley across North Dakota, the Rockies and the Pacific Northwest.

Almanac Data for today: The sunrises 6:29 a.m., sets 7:52 p.m.; moon rises 11:13 p.m., sets 12:07 a.m., Tides: high 12:41 p.m., low 7:12 a.m. and 7:28 p.m. High and low tides at the following locations may be obtained by subtracting the hours indicated from the hours above Annapolis (3 1/2), 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).

Pollen count: 15 - Ragweed (a reading of more than 7 is considered to be undesirable).

The Council of Governments' Air Quality index for yesterday showed the high reading in the Washington area during the 3 p.m. period was 130 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. An air pollutant alert has been declared effective through at least this afternoon.

The National Weather Service forecasts the Potomac River State at Little Falls should remain near 3.4 feet today. Local Temps., Humidity(TABLE) Times(COLUMN)T.(COLUMN)H. 12 midnite(COLUMN)72(COLUMN)66 1 a.m.(COLUMN)71(COLUMN)68 2 a.m.(COLUMN)70(COLUMN)71 3 a.m.(COLUMN)68(COLUMN)78 4 a.m.(COLUMN)66(COLUMN)84 5 a.m.(COLUMN)66(COLUMN)84 6 a.m.(COLUMN)66(COLUMN)84 7 a.m.(COLUMN)66(COLUMN)84 8 a.m.(COLUMN)69(COLUMN)76 9 a.m.(COLUMN)74(COLUMN)64 10 a.m.(COLUMN)78(COLUMN)56 11 a.m.(COLUMN)81(COLUMN)53 12 noon(COLUMN)82(COLUMN)51 1 p.m.(COLUMN)83(COLUMN)49 2 p.m.(COLUMN)84(COLUMN)48 3 p.m.(COLUMN)84(COLUMN)48 4 p.m.(COLUMN)85(COLUMN)46 5 p.m.(COLUMN)86(COLUMN)45 6 p.m.(COLUMN)85(COLUMN)50 7 p.m.(COLUMN)84(COLUMN)51(END TABLE) Temperatures ending 8 a.m. (EDT) yesterday:(TABLE) City(COLUMN)H.(COLUMN)L. Albany(COLUMN)77(COLUMN)48 Albuquerque(COLUMN)89(COLUMN)62 Amarillo(COLUMN)93(COLUMN)66 Anchorage(COLUMN)71(COLUMN)51 Asheville(COLUMN)82(COLUMN)65 Atlanta(COLUMN)86(COLUMN)72 Atlantic City(COLUMN)75(COLUMN)64 Austin(COLUMN)97(COLUMN)72 Baltimore(COLUMN)82(COLUMN)58 Billings(COLUMN)84(COLUMN)58 Birmingham(COLUMN)93(COLUMN)76 Bismarck(COLUMN)78(COLUMN)54 Boise(COLUMN)87(COLUMN)60 Boston(COLUMN)72(COLUMN)60 Brownsville(COLUMN)91(COLUMN)74 Buffalo(COLUMN)78(COLUMN)55 Burlington, Vt.(COLUMN)72(COLUMN)47 Casper(COLUMN)89(COLUMN)62 Charleston, S.C.(COLUMN)86(COLUMN)74 Charleston, W.V.(COLUMN)79(COLUMN)57 Charlotte(COLUMN)84(COLUMN)62 Cheyenne(COLUMN)84(COLUMN)58 Chicago(COLUMN)80(COLUMN)59 Cincinnati(COLUMN)79(COLUMN)57 Cleveland(COLUMN)79(COLUMN)61 Columbia, S.C.(COLUMN)87(COLUMN)66 Columbus(COLUMN)78(COLUMN)57 Dal.-Ft. Worth(COLUMN)99(COLUMN)72 Dayton(COLUMN)76(COLUMN)53 Denver(COLUMN)92(COLUMN)66 Des Moines(COLUMN)80(COLUMN)70 Detroit(COLUMN)81(COLUMN)58 Duluth(COLUMN)83(COLUMN)58 El Paso(COLUMN)94(COLUMN)74 Evansville(COLUMN)85(COLUMN)55 Fairbanks(COLUMN)60(COLUMN)50 Fargo(COLUMN)90(COLUMN)50 Flagstaff(COLUMN)81(COLUMN)47 Great Falls(COLUMN)81(COLUMN)55 Hartford(COLUMN)81(COLUMN)48 Helena(COLUMN)83(COLUMN)56 Honolulu(COLUMN)85(COLUMN)77 Houston(COLUMN)91(COLUMN)76 Indianapolis(COLUMN)81(COLUMN)57 Jackson(COLUMN)95(COLUMN)69 Jacksonville(COLUMN)90(COLUMN)71 Juneau(COLUMN)63(COLUMN)46 Kansas City(COLUMN)93(COLUMN)72 Las Vegas(COLUMN)103(COLUMN)74 Little Rock(COLUMN)91(COLUMN)67 Los Angeles(COLUMN)82(COLUMN)61 Louisville(COLUMN)81(COLUMN)61 Memphis(COLUMN)88(COLUMN)66 Miami Beach(COLUMN)86(COLUMN)79 Midland(COLUMN)93(COLUMN)66 Milwaukee(COLUMN)77(COLUMN)61 Mpls.-St. Paul(COLUMN)85(COLUMN)65 Nashville(COLUMN)85(COLUMN)64 New Orleans(COLUMN)93(COLUMN)78 New York(COLUMN)84(COLUMN)65 Norfolk(COLUMN)82(COLUMN)71 North Platte(COLUMN)97(COLUMN)57 Oklahoma City(COLUMN)102(COLUMN)72 Omaha(COLUMN)92(COLUMN)74 Orlando(COLUMN)92(COLUMN)75 Philadelphia(COLUMN)85(COLUMN)67 Phoenix(COLUMN)103(COLUMN)81 Pittsburgh(COLUMN)76(COLUMN)53 Portland. Me.(COLUMN)82(COLUMN)51 Portland, Ore.(COLUMN)68(COLUMN)58 Providence(COLUMN)78(COLUMN)58 Raleigh(COLUMN)85(COLUMN)62 Rapid City(COLUMN)89(COLUMN)62 Reno(COLUMN)82(COLUMN)51 Richmond(COLUMN)85(COLUMN)60 St. Louis(COLUMN)85(COLUMN)55 St. Prbg.-Tampa(COLUMN)92(COLUMN)76 Salt Lake City(COLUMN)93(COLUMN)74 San Antonio(COLUMN)94(COLUMN)74 San Diego(COLUMN)78(COLUMN)66 San Francisco(COLUMN)61(COLUMN)55 San Juan(COLUMN)89(COLUMN)78 St. Ste. Marie(COLUMN)80(COLUMN)54 Seattle(COLUMN)75(COLUMN)56 Shreveport(COLUMN)99(COLUMN)72 Sioux Falls(COLUMN)86(COLUMN)69 Spokane(COLUMN)70(COLUMN)51 Syracuse(COLUMN)76(COLUMN)56 Topeka(COLUMN)92(COLUMN)70 Tucson(COLUMN)97(COLUMN)75 Tulsa(COLUMN)103(COLUMN)76 Washington(COLUMN)85(COLUMN)65 Wichita(COLUMN)101(COLUMN)76(END TABLE) Temperature Abroad Yesterday(TABLE) City(COLUMN)Weather(COLUMN)Times(COLUMN)Temp. Aberdeen(COLUMN)clear(COLUMN)1 p.m.(COLUMN)64 Amsterdam(COLUMN)clear(COLUMN)1 p.m.(COLUMN)72 Ankara(COLUMN)clear(COLUMN)3 p.m.(COLUMN)72 Athens(COLUMN)pt. cldy.(COLUMN)2 p.m.(COLUMN)84 Berlin(COLUMN)clear(COLUMN)1 p.m.(COLUMN)81 Birmingham(COLUMN)rain(COLUMN)1 p.m.(COLUMN)64 Bonn(COLUMN)clear(COLUMN)1 p.m.(COLUMN)75 Brussels(COLUMN)clear(COLUMN)1 p.m.(COLUMN)73 Casablanca (COLUMN)pt. cldy.(COLUMN)noon(COLUMN)79 Copenhagen(COLUMN)clear(COLUMN)1 p.m.(COLUMN)75 Dublin(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)59 Geneva(COLUMN)clear(COLUMN)1 p.m.(COLUMN)75 Hong Kong(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)81 Lisbon(COLUMN)clear(COLUMN)noon(COLUMN)86 London(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)66 Madrid(COLUMN)clear(COLUMN)1 p.m.(COLUMN)90 Malta(COLUMN)pt. Cldy.(COLUMN)1 p.m.(COLUMN)82 Manila(COLUMN)rain(COLUMN)8 p.m.(COLUMN)75 Moscow(COLUMN)cloudy(COLUMN)3 p.m.(COLUMN)73 New Delhi(COLUMN)pt. cldy(COLUMN)5 p.m.(COLUMN)86 Nice(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)79 Oslo(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)64 Paris(COLUMN)clear(COLUMN)1 p.m.(COLUMN)75 Peking(COLUMN)clear(COLUMN)8 p.m.(COLUMN)77 Rome(COLUMN)clear(COLUMN)1 p.m.(COLUMN)82 Saigon(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)79 Sofia(COLUMN)clear(COLUMN)2 p.m.(COLUMN)73 Stockholm(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)70 Sydney(COLUMN)cloudy(COLUMN)10 p.m.(COLUMN)52 Tokyo(COLUMN)clear(COLUMN)9 p.m.(COLUMN)88 Tunis(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)82 Vienna(COLUMN)clear(COLUMN)1 p.m.(COLUMN)75 Warsaw(COLUMN)clear(COLUMN)1 p.m.(COLUMN)72(END TABLE) Temperature (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)clear(COLUMN)91(COLUMN)77 Barbados(COLUMN)fair(COLUMN)86(COLUMN)78 Bermuda(COLUMN)fair(COLUMN)86(COLUMN)79 Bogota(COLUMN)pt. cldy.(COLUMN)61(COLUMN)43 Calgary(COLUMN)clear(COLUMN)66(COLUMN)37 Culiacan(COLUMN)cloudy(COLUMN)95(COLUMN)72 Edmonton(COLUMN)pt. cldy.(COLUMN)64(COLUMN)43 Havana(COLUMN)cloudy(COLUMN)88(COLUMN)78 Kingston(COLUMN)cloudy(COLUMN)90(COLUMN)77 Montego Bay(COLUMN)cloudy(COLUMN)90(COLUMN)73 Mexico City(COLUMN)pt. cldy.(COLUMN)72(COLUMN)58 Monterrey(COLUMN)fair(COLUMN)93(COLUMN)70 Montreal(COLUMN)clear(COLUMN)73(COLUMN)55 Nassau(COLUMN)cloudy(COLUMN)82(COLUMN)75 Regina(COLUMN)cloudy(COLUMN)64(COLUMN)50 St. Kitts(COLUMN)fair(COLUMN)82(COLUMN)78 Toronto(COLUMN)clear(COLUMN)75(COLUMN)48 Vancouvor(COLUMN)clear(COLUMN)70(COLUMN)52 Veracruz(COLUMN)cloudy(COLUMN)85(COLUMN)75 Winnipeg(COLUMN)cloudy(COLUMN)63(COLUMN)39(END TABLE)