Washington: Today - Variable cloudiness and warmer, high in the upper 80s, low near 70. The chance of rain is 20 percent through tonight. Wind will be light and variable. Thursday - Partly cloudy, hot and humid, high in the 90s.

Maryland and Virginia: Today - Variable cloudiness and warmer, high in the 80s to near 90, low near 70. Thursday - Partly cloudy, hot and humid, with a chance of a thunderstorm, high in the 90s.

Extended Area Forecast for Friday through Sunday - Variable cloudiness with a chance of mainly afternoon and evening thundershowers Friday and Saturday. Partly cloudy Sunday, highs will average from the mid 80s to low 90s, lows will be in the 60s to low 70s. Normal Washington temperatures are a high of 88 and a low of 69.

West Virginia: Today - Mostly sunny, high in the 80s low in the 60s. Thursday - Partly cloudy with a chance of showers of thundershowers, high in the 80s.

Lower Potomac and Chesapeake Bay - Chance of showers. Visibility will be 3 to 5 miles diminishes to less than 1 mile in rain. Winds will be southwesterly at 10 to 15 knots. Waves will average 1 to 2 feet.

Atlantic Ocean Beaches from New Jersey to North Carolina: Today - Considerable cloudiness with a chance of showers, high in the 80s. Thursday - Partly cloudy warmer and more humid, high in the 80s. Water temperatures will range from 70 in the north to the upper 70s in the North Carolina.

The National Weather Forecast for today - Widely scattered showers and thundershowers will [WORD ILLEGIBLE] from Florida through the Carolina, upper Missouri Valley and from northern Arizona into southwestern Utah. Showers and thunderstorms will also reach from the Gulf Coast through much of the Missippi Valley, across the Great Lakes and the northern portion of the Ohio Valley through much New England, as well as over the Tennessee Valley and Gulf states to the Atlantic Coast from the northern Rockies into [WORD ILLEGIBLE]. Temperatures will be hot from the western half of the Great Lakes states into eastern south Dakota and from the upper Missouri Valley across the northen half of the Rockies, to the northern half of the Pacific Coast. Elsewhere, temperatures will remain seasonably warm.

Almanac Data for today: The sun rises 6:04 a.m., sets 8:25 p.m., moon sets 1:20 p.m. Tides: high 1:48 a.m. and 2:07 p.m., low 8:35 a.m. and 8:53 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).

Pollen Count: 10 English Plantain (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 41 for the pollutant, photochemical oxidants. Index values between 25 and 49 indicate fair air quality. When the index exceeds 100 the air is individuals with lung, heart and eye ailments are urged to restrict their activity. The forecast for today indicates that the air quality will deteriorate,

The National Weather Service forecasts the Potomac River Stage at Little Falls should remain near 3.2 feet today. Local Temp., Humidity(TABLE) Time(COLUMN)T.(COLUMN)H. 12 midnight(COLUMN)79(COLUMN)88 1 a.m.(COLUMN)78(COLUMN)91 2 a.m.(COLUMN)79(COLUMN)88 3 a.m.(COLUMN)78(COLUMN)94 4 a.m.(COLUMN)78(COLUMN)94 5 a.m.(COLUMN)78(COLUMN)94 6 a.m.(COLUMN)78(COLUMN)94 7 a.m.(COLUMN)77(COLUMN)97 8 a.m.(COLUMN)77(COLUMN)97 9 a.m.(COLUMN)78(COLUMN)94 10 a.m.(COLUMN)78(COLUMN)91 11 a.m.(COLUMN)80(COLUMN)88 12 noon(COLUMN)81(COLUMN)82 1 p.m.(COLUMN)82(COLUMN)80 2 p.m.(COLUMN)81(COLUMN)82 3 p.m.(COLUMN)81(COLUMN)82 4 p.m.(COLUMN)78(COLUMN)85 5 p.m.(COLUMN)78(COLUMN)85 6 p.m.(COLUMN)77(COLUMN)88 7 p.m.(COLUMN)75(COLUMN)88(END TABLE) Temperatures ending 8 a.m. (EDT) yesterday:(TABLE) City(COLUMN)H.(COLUMN)L. Albany(COLUMN)76(COLUMN)53 Albuquerque(COLUMN)91(COLUMN)62 Amarillo(COLUMN)88(COLUMN)65 Anchorage(COLUMN)63(COLUMN)56 Asheville(COLUMN)86(COLUMN)65 Atlanta(COLUMN)93(COLUMN)67 Atlantic City(COLUMN)82(COLUMN)69 Austin(COLUMN)94(COLUMN)75 Baltimore(COLUMN)90(COLUMN)72 Billings(COLUMN)97(COLUMN)65 Birmingham(COLUMN)93(COLUMN)75 Bismarck(COLUMN)92(COLUMN)60 Boise(COLUMN)99(COLUMN)63 Boston(COLUMN)84(COLUMN)66 Brownsville(COLUMN)95(COLUMN)74 Buffalo(COLUMN)79(COLUMN)60 Burlington, Vt.(COLUMN)78(COLUMN)54 Casper(COLUMN)94(COLUMN)62 Charleston, S.C.(COLUMN)93(COLUMN)80 Charleston, W.V.(COLUMN)83(COLUMN)68 Charolotte(COLUMN)94(COLUMN)70 Cheyenne(COLUMN)90(COLUMN)59 Chicago(COLUMN)78(COLUMN)64 Cincinnati(COLUMN)77(COLUMN)71 Cleveland(COLUMN)79(COLUMN)65 Columbia, S.C.(COLUMN)97(COLUMN)70 Columbus(COLUMN)78(COLUMN)71 Dal.Ft. Worth(COLUMN)95(COLUMN)77 Dayton(COLUMN)77(COLUMN)67 Denver(COLUMN)95(COLUMN)63 Des Moines(COLUMN)68(COLUMN)66 Detroit(COLUMN)81(COLUMN)59 Duluth(COLUMN)89(COLUMN)69 El Paso(COLUMN)89(COLUMN)68 Evansville(COLUMN)81(COLUMN)73 Farbanks(COLUMN)75(COLUMN)56 Fargo(COLUMN)86(COLUMN)63 Flagstaff(COLUMN)74(COLUMN)50 Great Falls(COLUMN)99(COLUMN)57 Hartford(COLUMN)83(COLUMN)60 Helena(COLUMN)92(COLUMN)54 Honolulu(COLUMN)87(COLUMN)74 Houston(COLUMN)86(COLUMN)73 Indianapolis(COLUMN)79(COLUMN)73 Jackson(COLUMN)93(COLUMN)71 Jacksonville(COLUMN)91(COLUMN)74 Juneau(COLUMN)55(COLUMN)50 Kansas City(COLUMN)83(COLUMN)68 Las Vegas(COLUMN)109(COLUMN)85 Little Rock(COLUMN)89(COLUMN)76 Los Angeles(COLUMN)85(COLUMN)63 Louisville(COLUMN)80(COLUMN)72 Memphis(COLUMN)92(COLUMN)79 Miami Beach(COLUMN)88(COLUMN)80 Midland(COLUMN)82(COLUMN)67 Milwaukee(COLUMN)75(COLUMN)62 Mpls.-St. Paul(COLUMN)81(COLUMN)70 Nashville(COLUMN)95(COLUMN)74 New Orleans(COLUMN)90(COLUMN)73 New York(COLUMN)82(COLUMN)71 Norfolk(COLUMN)86(COLUMN)69 North Platte(COLUMN)94(COLUMN)64 Oklahoma City(COLUMN)93(COLUMN)73 Omaha(COLUMN)81(COLUMN)67 Orlando(COLUMN)92(COLUMN)74 Philadelphia(COLUMN)89(COLUMN)72 Phoenix(COLUMN)104(COLUMN)78 Pittsburgn(COLUMN)78(COLUMN)64 Portland, Me.(COLUMN)81(COLUMN)53 Portland, Ore.(COLUMN)86(COLUMN)61 Providence(COLUMN)81(COLUMN)63 Raleigh(COLUMN)95(COLUMN)71 Rapid City(COLUMN)96(COLUMN)67 Reno(COLUMN)98(COLUMN)68 Richmond(COLUMN)93(COLUMN)68 St. Louis(COLUMN)72(COLUMN)67 St. Pbg.-Tampa(COLUMN)93(COLUMN)77 Salt Lake City(COLUMN)103(COLUMN)66 San Antonio(COLUMN)96(COLUMN)76 San Diego(COLUMN)77(COLUMN)69 San Francisco(COLUMN)63(COLUMN)54 San Juan(COLUMN)89(COLUMN)78 St. Ste.Marie(COLUMN)80(COLUMN)56 Seattle(COLUMN)75(COLUMN)56 Shreveport(COLUMN)92(COLUMN)70 Sioux Falls(COLUMN)84(COLUMN)65 Spokane(COLUMN)91(COLUMN)59 Syracuse(COLUMN)80(COLUMN)54 Topeka(COLUMN)74(COLUMN)62 Tucson(COLUMN)99(COLUMN)76 Tulsa(COLUMN)93(COLUMN)72 Washington(COLUMN)90(COLUMN)77 Wichita(COLUMN)91(COLUMN)68(END TABLE) Temperature Abroad Yesterday(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)Temp. Aberdeen(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN)64 Amsterdam(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)65 Ankara(COLUMN)pt. cldy.(COLUMN) 3 p.m.(COLUMN)77 Athens(COLUMN)clear(COLUMN) 2 p.m.(COLUMN)82 Auckland(COLUMN)cloudy(COLUMN)midnight(COLUMN)54 Berlin(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)75 Birmingham(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN)66 Bonn(COLUMN)pt. cldy(COLUMN) 1 p.m.(COLUMN)70 Brussels(COLUMN)pt. cldy.(COLUMN) 1 p.m.(COLUMN)68 Cairo(COLUMN)clear(COLUMN) 2 p.m.(COLUMN)88 Casablanca(COLUMN)clear(COLUMN)noon(COLUMN)77 Copenhagen(COLUMN)pt. cldy.(COLUMN) 1 p.m.(COLUMN)64 Dublin(COLUMN)rain(COLUMN) 1 p.m.(COLUMN)57 Geneva(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)77 Hong Kong(COLUMN)cloudy(COLUMN) 8 p.m.(COLUMN)82 Jerusalem(COLUMN)clear(COLUMN) 2 p.m.(COLUMN)77 Lisbon(COLUMN)clear(COLUMN)noon(COLUMN)82 London(COLUMN)pt. cldy.(COLUMN) 1 p.m.(COLUMN)70 Madrid(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)91 Malta(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)82 Manila(COLUMN)cloudy(COLUMN) 8 p.m.(COLUMN)82 Moscow(COLUMN)rain(COLUMN) 3 p.m.(COLUMN)57 New Delhi(COLUMN)pt. cldy.(COLUMN) 5 p.m.(COLUMN)84 Nice(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)75 Oslo(COLUMN)pt. cldy.(COLUMN) 1 p.m.(COLUMN)66 Paris(COLUMN)pt. cldy.(COLUMN) 1 p.m.(COLUMN)73 Peking(COLUMN)rain(COLUMN) 8 p.m.(COLUMN)77 Rome(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)82 Saigon(COLUMN)rain(COLUMN) 8 p.m.(COLUMN)79 Sofia(COLUMN)clear(COLUMN) 2 p.m.(COLUMN)70 Stockholm(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN)70 Sydney(COLUMN)clear(COLUMN)10 p.m.(COLUMN)52 Tokyo(COLUMN)clear(COLUMN) 9 p.m.(COLUMN)82 Tunis(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)81 Vienna(COLUMN)pt. cldy.(COLUMN) 1 P.m.(COLUMN)75 Warsaw(COLUMN)pt. cldy.(COLUMN)10 p.m.(COLUMN)72(END TABLE) Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)cloudy(COLUMN)88(COLUMN)75 Barbados(COLUMN)showers(COLUMN)88(COLUMN)75 Bermuda(COLUMN)pt. cldy(COLUMN)88(COLUMN)79 Bogota(COLUMN)pt. cldy.(COLUMN)68(COLUMN)33 Calgary(COLUMN)clear(COLUMN)86(COLUMN)52 Edmonton(COLUMN)clear(COLUMN)77(COLUMN)43 Havana(COLUMN)pt. cldy.(COLUMN)98(COLUMN)75 Kingston(COLUMN)fair(COLUMN)92(COLUMN)79 Mexico City(COLUMN)haze(COLUMN)77(COLUMN)57 Monterrey(COLUMN)pt. cldy.(COLUMN)94(COLUMN)73 Montreal(COLUMN)clear(COLUMN)79(COLUMN)61 Nassau(COLUMN)pt. cldy.(COLUMN)90(COLUMN)75 Ottawa(COLUMN)clear(COLUMN)81(COLUMN)55 Regina(COLUMN)clear(COLUMN)88(COLUMN)61 St. Kitts(COLUMN)pt. cldy.(COLUMN)88(COLUMN)78 St. Thomas(COLUMN)fair(COLUMN)91(COLUMN)78 Toronto(COLUMN)pt. cldy.(COLUMN)77(COLUMN)52 Vancouver(COLUMN)clear(COLUMN)73(COLUMN)57 Veracruz(COLUMN)rain(COLUMN)86(COLUMN)73 Winnipeg(COLUMN)clear(COLUMN)86(COLUMN)63(END TABLE)