Washington: Today-Sunny and breezy, high near 80, low near 55. The chance of rain is near zero through tonight. Winds will be from the north at 10 to 20 m.p.h. Tuesday - Sunny, high in the 70s.

Maryland and Virginia: Today - Sunny and breezy, high in the 70s, lows in the 40s and 50s. Tuesday - Sunny, high in the 70s.

Extended Area Forecast for Wednesday through Friday - Fair with a chance of showers late Thursday or Friday. Highs will average in the 70s to near 80s, lows in the 50s. Normal Washington temperatures are a high of 76 and a low of 57.

Lower Potomac and Chesapeake Bay - Fair with visibility of 5 miles or more. Winds will become northerly increasing to 15 to 25 knots. Waves will average near 2 feet.

West Virginia: Today - Partly cloudy, highs from the mid 60s to mid 70s, lows from the upper 40s to mid 50s. Tuesday - Sunny, highs from the mid 60s to lows 70s.

The National Weather Forecast for today - Widely scattered showers and thunderstorms will extend from the southern Rocky Mountains across western and southern Texas, the Gulf Coast region, Florida and the coasts of Georgia and South Carolina. Showers will also occur in western Washington state and the extreme northern section of New England. Clear to partly cloudy skies will be found over most of the rest of the country. Temperatures will be slightly cooler than normal from the southern Rocky Mountains into western Texas and throughout the Great Lakes region, northern Illonois, the north Atlantic Coastal states and most of the Ohio Valley. Warm temperature readings are in store for Montana, the Gulf Coast region and most of California, with unseasonably hot temperatures continuing over California's, southern coast.

Almanac Data for today: The sunrises 6:58 a.m., sets 7:01 p.m.; moon sets 3:10 p.m. Tides high 3:06 a.m. and 3:49 p.m. low 10:15 a.m. and 10:30 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 Lookout (7).

The Council of Government's Air index for yesterday showed the high reading in the Washington area during the 1 p.m. period was 40 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 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 3.0 today.(TABLE) Time(COLUMN)T.(COLUMN)H. 12 midnite(COLUMN)62(COLUMN)74 1 a.m.(COLUMN)62(COLUMN)72 2 a.m.(COLUMN)62(COLUMN)72 3 a.m.(COLUMN)63(COLUMN)70 4 a.m.(COLUMN)61(COLUMN)75 5 a.m.(COLUMN)62(COLUMN)72 6 a.m.(COLUMN)62(COLUMN)72 7 a.m.(COLUMN)59(COLUMN)81 8 a.m.(COLUMN)60(COLUMN)78 9 a.m.(COLUMN)62(COLUMN)72 10 a.m.(COLUMN)63(COLUMN)70 11 a.m.(COLUMN)65(COLUMN)61 12 noon(COLUMN)67(COLUMN)57 1 p.m.(COLUMN)69(COLUMN)55 2 p.m.(COLUMN)72(COLUMN)51 3 p.m.(COLUMN)71(COLUMN)53 4 p.m.(COLUMN)72(COLUMN)53 5 p.m.(COLUMN)72(COLUMN)53 6 p.m.(COLUMN)70(COLUMN)57 7 p.m.(COLUMN)68(COLUMN)63(END TABLE)(TABLE) City(COLUMN)H.(COLUMN)L. Albany(COLUMN)65(COLUMN)36 Albuquerque(COLUMN)74(COLUMN)61 Amarillo(COLUMN)74(COLUMN)62 Anchorage(COLUMN)54(COLUMN)37 Asheville(COLUMN)70(COLUMN)60 Atlanta(COLUMN)87(COLUMN)65 Atlantic City(COLUMN)62(COLUMN)52 Austin(COLUMN)78(COLUMN)71 Baltimore(COLUMN)70(COLUMN)54 Billings(COLUMN)77(COLUMN)47 Birmingham(COLUMN)87(COLUMN)65 Bismarck(COLUMN)76(COLUMN)39 Boise(COLUMN)80(COLUMN)52 Boston(COLUMN)60(COLUMN)48 Brownsville(COLUMN)84(COLUMN)75 Buffalo(COLUMN)38(COLUMN)42 Burlington, Vt.(COLUMN)63(COLUMN)40 Casper(COLUMN)80(COLUMN)40 Charleston, S.C.(COLUMN)85(COLUMN)70 Charleston, W.V.(COLUMN)71(COLUMN)59 Charlotte(COLUMN)72(COLUMN)61 Cheyenne(COLUMN)79(COLUMN)43 Chicago(COLUMN)71(COLUMN)50 Cincinnati(COLUMN)76(COLUMN)60 Cleveland(COLUMN)72(COLUMN)48 Columbia(COLUMN)82(COLUMN)67 Columbus, Ohio(COLUMN)72(COLUMN)57 Dal.-Ft. Worth(COLUMN)87(COLUMN)68 Dayton(COLUMN)73(COLUMN)50 Denver(COLUMN)83(COLUMN)47 Des Moines(COLUMN)73(COLUMN)53 Detroit(COLUMN)69(COLUMN)45 Duluth(COLUMN)71(COLUMN)51 El Paso(COLUMN)69(COLUMN)61 Evansville(COLUMN)76(COLUMN)51 Fairbanks(COLUMN)42(COLUMN)30 Fargo(COLUMN)76(COLUMN)45 Flagstaff(COLUMN)72(COLUMN)42 Great Falls(COLUMN)75(COLUMN)43 Hartford(COLUMN)66(COLUMN)36 Helena(COLUMN)76(COLUMN)42 Honolulu(COLUMN)88(COLUMN)72 Houston(COLUMN)83(COLUMN)72 Indianapolis(COLUMN)74(COLUMN)47 Jackson(COLUMN)90(COLUMN)62 Jacksonville(COLUMN)91(COLUMN)71 Juneau(COLUMN)56(COLUMN)44 Kansas City(COLUMN)75(COLUMN)58 Las Vegas(COLUMN)100(COLUMN)68 Little Rock(COLUMN)77(COLUMN)58 Los Angeles(COLUMN)100(COLUMN)76 Louisville(COLUMN)75(COLUMN)60 Memphis(COLUMN)79(COLUMN)58 Miami Beach(COLUMN)84(COLUMN)81 Midland(COLUMN)65(COLUMN)63 Milwaukee(COLUMN)68(COLUMN)51 Mpls.-St. Paul(COLUMN)75(COLUMN)48 Nashville(COLUMN)68(COLUMN)56 New Orleans(COLUMN)89(COLUMN)77 New York(COLUMN)68(COLUMN)51 Norfolk(COLUMN)72(COLUMN)64 North Platte(COLUMN)89(COLUMN)46 Oklahoma City(COLUMN)85(COLUMN)66 Omaha(COLUMN)74(COLUMN)55 Orlando(COLUMN)90(COLUMN)74 Philadelphia(COLUMN)71(COLUMN)49 Phoenix(COLUMN)100(COLUMN)76 Pittsburgh(COLUMN)67(COLUMN)50 Portland, Me.(COLUMN)65(COLUMN)34 Portland, Ore.(COLUMN)76(COLUMN)53 Providence(COLUMN)65(COLUMN)41 Raleigh(COLUMN)72(COLUMN)62 Rapid City(COLUMN)84(COLUMN)50 Reno(COLUMN)86(COLUMN)40 Richmond(COLUMN)68(COLUMN)55 St. Louis(COLUMN)73(COLUMN)50 St. Prbg.-Tampa(COLUMN)88(COLUMN)74 Salt Lake City(COLUMN)77(COLUMN)47 San Antonio(COLUMN)77(COLUMN)71 San Diego(COLUMN)95(COLUMN)73 San Francisco(COLUMN)90(COLUMN)69 St. Ste. Marie(COLUMN)70(COLUMN)42 Seattle(COLUMN)64(COLUMN)55 Shreveport(COLUMN)85(COLUMN)61 Sioux Falls(COLUMN)77(COLUMN)45 Spokane(COLUMN)51(COLUMN)47 Syracuse(COLUMN)66(COLUMN)41 Topeka(COLUMN)81(COLUMN)55 Tucson(COLUMN)91(COLUMN)70 Tulsa(COLUMN)87(COLUMN)64 Washington(COLUMN)72(COLUMN)59 Wichita(COLUMN)78(COLUMN)62(END TABLE)(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)Temp. Aberdeen(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)61 Amsterdam(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)64 Ankara(COLUMN)clear(COLUMN)3 p.m.(COLUMN)64 Athens(COLUMN)clear(COLUMN)2 p.m.(COLUMN)75 Auckland(COLUMN)pt. cldy.(COLUMN)midnight(COLUMN)57 Berlin(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)61 Birmingham(COLUMN)clear(COLUMN)1 p.m.(COLUMN)70 Bonn(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)70 Brussels(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)63 Casablanca(COLUMN)clear(COLUMN)noon(COLUMN)88 Copenhagen(COLUMN)drizzle(COLUMN)1 p.m.(COLUMN)57 Dublin(COLUMN)drizzle(COLUMN)1 p.m.(COLUMN)66 Geneva(COLUMN)clear(COLUMN)1 p.m.(COLUMN)68 Hong Kong(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)79 Jerusalem(COLUMN)pt. cldy.(COLUMN)2 p.m.(COLUMN)73 Lisbon(COLUMN)clear(COLUMN)noon(COLUMN)88 London(COLUMN)clear(COLUMN)1 p.m.(COLUMN)72 Madrid(COLUMN)clear(COLUMN)1 p.m.(COLUMN)81 Malta(COLUMN)clear(COLUMN)1 p.m.(COLUMN)75 Manila(COLUMN)rain(COLUMN)8 p.m.(COLUMN)73 Moscow(COLUMN)cloudy(COLUMN)3 p.m.(COLUMN)41 New Delhi(COLUMN)pt. cldy.(COLUMN)5 p.m.(COLUMN)88 Nice(COLUMN)clear(COLUMN)1 p.m.(COLUMN)72 Oslo(COLUMN)drizzle(COLUMN)1 p.m.(COLUMN)48 Paris(COLUMN)clear(COLUMN)1 p.m.(COLUMN)73 Peking(COLUMN)clear(COLUMN)8 p.m.(COLUMN)70 Rome(COLUMN)clear(COLUMN)1 p.m.(COLUMN)75 Saigon(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)84 Stockholm(COLUMN)rain(COLUMN)1 p.m.(COLUMN)45 Sydney(COLUMN)clear(COLUMN)10 p.m.(COLUMN)57 Tokyo(COLUMN)pt. cldy.(COLUMN)9 p.m.(COLUMN)70 Tunis(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)79 Vienna(COLUMN)rain(COLUMN)1 p.m.(COLUMN)61 Warsaw(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)50(END TABLE)(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)fair(COLUMN)79(COLUMN)75 Barbados(COLUMN)pt. cldy.(COLUMN)86(COLUMN)77 Bermuda(COLUMN)clear(COLUMN)84(COLUMN)77 Calgary(COLUMN)pt. cldy.(COLUMN)59(COLUMN)39 Culiacan(COLUMN)cloudy(COLUMN)102(COLUMN)82 Edmonton(COLUMN)clear(COLUMN)59(COLUMN)34 Havana(COLUMN)fair(COLUMN)88(COLUMN)73 Kingston(COLUMN)pt. cldy.(COLUMN)93(COLUMN)77 Montego Bay(COLUMN)pt. cldy.(COLUMN)87(COLUMN)75 Mexico City(COLUMN)cloudy(COLUMN)72(COLUMN)59 Monterrey(COLUMN)pt. cldy.(COLUMN)73(COLUMN)70 Montreal(COLUMN)clear(COLUMN)61(COLUMN)41 Nassau(COLUMN)pt. cldy.(COLUMN)90(COLUMN)73 Ottawa(COLUMN)fog(COLUMN)63(COLUMN)39 Regina(COLUMN)clear(COLUMN)70(COLUMN)32 St. Kitts(COLUMN)pt. cldy.(COLUMN)88(COLUMN)75 St. Thomas(COLUMN)pt. cldy.(COLUMN)84(COLUMN)70 Toronto(COLUMN)clear(COLUMN)64(COLUMN)39 Vancouver(COLUMN)cloudy(COLUMN)59(COLUMN)54 Vera Cruz(COLUMN)cloudy(COLUMN)84(COLUMN)72 Winnipeg(COLUMN)clear(COLUMN)72(COLUMN)39(END TABLE)