Washington: Today - Mostly sunny and pleasant, high in the 70s; low near 60. The chance of rain is 10 percent through tonight. Winds will be from the southeast at 5 to [WORD ILLEGIBLE] mph. Thursday - Variable cloudiness, high near 80.

Maryland and Virginia: Today - Mostly sunny with increasing cloudiness by nightfall over the mountains, high in the 70s, lows in the 50s to low 60s. Thursday - Variable cloudiness, chance of showers over the mountains, highs from the 70s to low 80s.

Extended Area Forecast for Friday through Sunday - Variable cloudiness through the period with a chance of showers Saturday and Sunday. Highs will average in the 70s to near 80s; lows in the 50s and 60s. Normal, Washington temperatures are a high of 76 and a low of 56.

Lower Potomac and Chesapeake Bay - Fair with visibility of 5 miles or more. Winds will be from the south at 5 to 15 knots. Waves will average 1 to 2 feet.

West Virginia: Today - Sunny, becoming partly cloudy, highs from the 70s to low 80s, lows in the 50s Thursday - Partly cloudy, high near 80.

The National Weather Forecasts for today - Rain with some thunderstorms will cover much of eastern Texas, the lower Mississippi Valley and the South Atlantic Coastal states. Rainshowers will occur from the northern Pacific Coast through northern Idaho into northwestern Montana, as well as in the lower Great Lakes region and northern Maine. Skies will be fair from the Southern Pacific Coast across the Great Basin into the central Plains, along much of the middle and north Atlantic Coast and from North Dakota across Northern Michigan. Most of the rest of the nation will be partly cloudy. Temperatures will remain unseasonably hot over southern California, while cool readings will prevail over [WORD ILLEGIBLE] Mississippi Valley, the upper Great Lakes, New Mexico, the Southwest and central Texas.

The Council of Government's Quality Index for yesterday showed the high reading in the Washington area during the 3 p.m. period was 28 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 about the same.

The National Weather Service forecasts the Potomac River stage at Little Falls should remain near 2.9 feet today.

Almanac Data for today: The sun rises 7:00 a.m., sets 6:58 p.m. moon rises 2:32 a.m. Sets 4:28 p.m. Tides: high 5:00 a.m. and 5:36 p.m. low 12:00 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).

Pollen Count: 42 for Ragweed (a reading of more than 7 is considered to be undesirable).

(TABLE) Time(COLUMN)T.(COLUMN)H. 2 midnight(COLUMN)64(COLUMN)50 1 a.m.(COLUMN)62(COLUMN)54 2 a.m.(COLUMN)61(COLUMN)56 3 a.m.(COLUMN)61(COLUMN)54 4 a.m.(COLUMN)59(COLUMN)62 5 a.m.(COLUMN)55(COLUMN)72 6 a.m.(COLUMN)56(COLUMN)69 7 a.m.(COLUMN)56(COLUMN)67 8 a.M.(COLUMN)56(COLUMN)64 9 a.m.(COLUMN)57(COLUMN)62 10 a.m.(COLUMN)58(COLUMN)57 11 a.m.(COLUMN)60(COLUMN)51 12 noon(COLUMN)63(COLUMN)41 1 p.m.(COLUMN)65(COLUMN)40 2 p.m.(COLUMN)68(COLUMN)36 3 p.m.(COLUMN)70(COLUMN)34 4 p.m.(COLUMN)71(COLUMN)37 5 p.m.(COLUMN)71(COLUMN)37 6 p.m.(COLUMN)70(COLUMN)38 7 p.m.(COLUMN)66(COLUMN)47(END TABLE) Temperatures ending 8 a.m. (EDT) yesterday

(TABLE) City(COLUMN)H.(COLUMN)L. Albany(COLUMN)68(COLUMN)30 Albuquerque(COLUMN)67(COLUMN)56 Amarillo(COLUMN)68(COLUMN)59 Anchorage(COLUMN)55(COLUMN)46 Asheville(COLUMN)76(COLUMN)61 Atlanta(COLUMN)81(COLUMN)65 Atlantic City(COLUMN)73(COLUMN)48 Austin(COLUMN)87(COLUMN)68 Baltimore(COLUMN)80(COLUMN)48 Billings(COLUMN)83(COLUMN)55 Birmingham(COLUMN)84(COLUMN)65 Bismarck(COLUMN)81(COLUMN)44 Boise(COLUMN)89(COLUMN)60 Boston(COLUMN)73(COLUMN)42 Brownsville(COLUMN)89(COLUMN)76 Buffalo(COLUMN)62(COLUMN)37 Burlington, Vt.(COLUMN)57(COLUMN)30 Casper(COLUMN)83(COLUMN)46 Charleston, S.C.(COLUMN)84(COLUMN)69 Charleston, W.V.(COLUMN)75(COLUMN)48 Charlotte(COLUMN)79(COLUMN)62 Cheyenne(COLUMN)71(COLUMN)45 Chicago(COLUMN)66(COLUMN)47 Cincinnati(COLUMN)76(COLUMN)46 Cleveland(COLUMN)68(COLUMN)47 Columbia, S.C.(COLUMN)81(COLUMN)64 Columbus, Ohio(COLUMN)73(COLUMN)41 Dal.-Ft. Worth(COLUMN)85(COLUMN)68 Dayton(COLUMN)70(COLUMN)45 Denver(COLUMN)75(COLUMN)47 Des Moines(COLUMN)74(COLUMN)51 Detroit(COLUMN)67(COLUMN)42 Duluth(COLUMN)57(COLUMN)51 El Paso(COLUMN)68(COLUMN)57 Evansville(COLUMN)79(COLUMN)47 Fairbanks(COLUMN)48(COLUMN)41 Fargo(COLUMN)78(COLUMN)52 Flagstaff(COLUMN)73(COLUMN)40 Great Falls(COLUMN)82(COLUMN)55 Hartford(COLUMN)72(COLUMN)33 Helena(COLUMN)81(COLUMN)49 Honululu(COLUMN)88(COLUMN)74 Houston(COLUMN)83(COLUMN)68 Indianapolis(COLUMN)75(COLUMN)43 Jackson(COLUMN)88(COLUMN)65 Jacksonville(COLUMN)85(COLUMN)68 Juneau(COLUMN)56(COLUMN)32 Kansas City(COLUMN)75(COLUMN)32 Las Vegas(COLUMN)95(COLUMN)66 Little Rock(COLUMN)79(COLUMN)63 Los Angeles(COLUMN)105(COLUMN)75 Louisville(COLUMN)79(COLUMN)51 Memphis(COLUMN)86(COLUMN)65 Miami Beach(COLUMN)83(COLUMN)77 Midland(COLUMN)66(COLUMN)61 Milwaukee(COLUMN)61(COLUMN)49 Mpls.-St. Paul(COLUMN)71(COLUMN)56 Nashville(COLUMN)82(COLUMN)56 New Orleans(COLUMN)87(COLUMN)76 New York(COLUMN)74(COLUMN)36 Norfolk(COLUMN)79(COLUMN)65 North Platte(COLUMN)81(COLUMN)47 Oklahoma City(COLUMN)79(COLUMN)68 Omaha(COLUMN)76(COLUMN)55 Orlando(COLUMN)91(COLUMN)71 Philadelphia(COLUMN)77(COLUMN)48 Phoenix(COLUMN)99(COLUMN)77 Pittsburgh(COLUMN)67(COLUMN)39 Portland, Me.(COLUMN)72(COLUMN)38 Portland, Ore.(COLUMN)79(COLUMN)57 Providence(COLUMN)71(COLUMN)39 Raleigh(COLUMN)80(COLUMN)57 Rapid City(COLUMN)89(COLUMN)48 Reno(COLUMN)91(COLUMN)46 Richmond(COLUMN)81(COLUMN)53 St. Louis(COLUMN)78(COLUMN)48 St. Prbg. Tampa(COLUMN)89(COLUMN)73 Salt Lake City(COLUMN)80(COLUMN)52 San Antonio(COLUMN)85(COLUMN)64 San Diego(COLUMN)104(COLUMN)74 San Francisco(COLUMN)90(COLUMN)54 San Juan(COLUMN)88(COLUMN)76 St. Ste. Marie(COLUMN)52(COLUMN)34 Seattle(COLUMN)69(COLUMN)53 Shreveport(COLUMN)84(COLUMN)65 Sioux Falls(COLUMN)76(COLUMN)56 Spokane(COLUMN)75(COLUMN)50 Syracuse(COLUMN)62(COLUMN)33 Topeka(COLUMN)77(COLUMN)49 Tucson(COLUMN)92(COLUMN)71 Tulsa(COLUMN)81(COLUMN)64 Washington(COLUMN)81(COLUMN)55 Wichita(COLUMN)77(COLUMN)56(END TABLE)

(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)Temp. Aberdeen(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)55 Amsterdam(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)61 Ankara(COLUMN)clear(COLUMN)3 p.m.(COLUMN)70 Athens(COLUMN)clear(COLUMN)2 P.M.(COLUMN)77 Auckland(COLUMN)pt. cldy.(COLUMN)midnite(COLUMN)52 Berlin(COLUMN)1 pt. cldy(COLUMN)1 p.m.(COLUMN)9 Birmingham(COLUMN)rain(COLUMN)1 p.m.(COLUMN)59 Bonn(COLUMN)Cloudy(COLUMN)1 p.m.(COLUMN)55 Brussels(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)57 Casablanca(COLUMN)pt. cldy.(COLUMN)noon(COLUMN)82 Copenhagen(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)59 Dublin(COLUMN)rain(COLUMN)1 p.m.(COLUMN)55 Geneva(COLUMN)clear(COLUMN)1 p.m.(COLUMN)70 Hong Kong(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)81 Lisbon(COLUMN)haze(COLUMN)noon(COLUMN)77 London(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)64 Madrid(COLUMN)clear(COLUMN)1 p.m. Malta(COLUMN)clear(COLUMN)1 p.m.(COLUMN)79 Manila(COLUMN)rain(COLUMN)8 p.m.(COLUMN)81 Moscow(COLUMN)cloudy(COLUMN)3 p.m.(COLUMN)39 New Delhi(COLUMN)clear(COLUMN)5 p.m.(COLUMN)93 Nice(COLUMN)clear(COLUMN)1 p.m.(COLUMN)72 Oslo(COLUMN)clear(COLUMN)1 p.M.(COLUMN)57 Paris(COLUMN)cloudy(COLUMN)1 p.m!(COLUMN)57 Peking(COLUMN)clear(COLUMN)8 p.m.(COLUMN)63 Rome(COLUMN)clear(COLUMN)1 p.m.(COLUMN)75 Saigon(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)81 Sofia(COLUMN)clear(COLUMN)2 p.m.(COLUMN)75 Stockholm(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)50 Sydney(COLUMN)cloudy(COLUMN)10p.m.(COLUMN)63 Tokyo(COLUMN)cloudy(COLUMN)9 p.m.(COLUMN)75 Tunis(COLUMN)clear(COLUMN)1 p.m.(COLUMN)82 Vienna(COLUMN)clear(COLUMN)1 p.m.(COLUMN)72 Warsaw(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)57(END TABLE)

(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)fair(COLUMN)88(COLUMN)77 Barbados(COLUMN)cloudy(COLUMN)84(COLUMN)75 Bermuda(COLUMN)pt. cldy.(COLUMN)83(COLUMN)76 Bogota(COLUMN)drizzle(COLUMN)70(COLUMN)50 Calgary(COLUMN)cloudy(COLUMN)63(COLUMN)39 Culiacan(COLUMN)cloudy(COLUMN)84(COLUMN)75 Edmonton(COLUMN)clear(COLUMN)50(COLUMN)34 Havana(COLUMN)pt. cldy.(COLUMN)86(COLUMN)75 Kingston(COLUMN)fair(COLUMN)90(COLUMN)77 Mexico City(COLUMN)drizzle(COLUMN)78(COLUMN)70 Montego Bay(COLUMN)fair(COLUMN)86(COLUMN)73 Monterrey(COLUMN)fair(COLUMN)72(COLUMN)55 Montreal(COLUMN)clear(COLUMN)59(COLUMN)28 Nassau(COLUMN)pt. cldy.(COLUMN)52(COLUMN)32 Ottawa(COLUMN)clear(COLUMN)52(COLUMN)32 Regina(COLUMN)cloudy(COLUMN)73(COLUMN)46 St. Kitts(COLUMN)pt. cldy.(COLUMN)89(COLUMN)77 St. Thomas(COLUMN)cloudy(COLUMN)88(COLUMN)78 Toronto(COLUMN)clear(COLUMN)61(COLUMN)50 Vancouver(COLUMN)clear(COLUMN)61(COLUMN)50 Vera Cruz(COLUMN)cloudy(COLUMN)86(COLUMN)75 Winnipeg(COLUMN)cloudy(COLUMN)68(COLUMN)46(END TABLE)