Washington: Today - Sunny, breezy and cooler, high near 80, low in the 50s. The chance of rain is 20 percent. Winds will shift to the northwest at 15 to 20 mph. Wednesday - Sunny and pleasant, high in the 70s.

Maryland and Virginia: Today - Sunny, breezy and cooler, highs from the 70s to mid 80s, lows in the 50s. Wednesday - Sunny and pleasant, high in the 70s.

Extended Area Forecast for Thursday through Saturday - Sunny and pleasant early in the period, turning warmer and more humid on Friday. Highs Thursday will be from the 70s to mid 80s. Increasing well up into the 80s by Saturday. Lows will be mainly in the 50s, reaching into the 60s by Saturday.

Lower Potomac and Chesapeake Bay - Showers ending by morning followed by clearing skies. Winds will shift to the northwest at 15 to 25 knots. Visibility will be 5 miles or more except in showers. Waves will average 2 to 3 feet.

Atlantic Ocean Beaches from New Jersey to Maryland - Today - Chance of lingering showers, high in the mid 70s. Wednesday - Sunny and cooler, high near 70. Water temperatures will range from near 60 to the mid 60s.

Atlantic Ocean Beaches from Virginia to North Carolina - Today - Showers followed by breezy and less humid weather, highs from near 80 to the mid 80s. Wednesday - Sunny and cooler, high in the 70s. Water temperatures will range from the mid 60s to near 70.

West Virginia: Today - Mostly sunny and cooler, highs from the upper 60s to mid 70s, lows in the 40s. Wednesday - Sunny, highs from the upper 60s to mid 70s.

The Council of Governments' Air Quality Index for yesterday showed the high reading in the Washington area during the 3 p.m. period was 75 for the pollutant, photochemical oxidents. 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 3.5 feet today.

The national weather forecast for today - Showers and thunder showers will extend from New England through New York state and along the Atlantic Coast to Florida, as well as over the eastern half of the Gulf Coast. Showers will also reach from northern California through Washington and across the northern Inter mountain region into western Montana. Temperatures will be cool over the upper Great Lakes and the Northwest. Temperatures will be warm to hot from inland portions of the south-west across the southern two thirds of the Rockies and Plains, and the Gulf Coastal and southern Atlantic states. Temperatures elsewhere will be seasonably mild.

Almanac Data for today: The sun rises 5:42 a.m., sets 8:34 p.m.; moon rises 12:52 p.m., [TEXT OMITTED FROM SOURCE]a.m., Tides: high 1:50 a.m. and 2:03 p.m., low 8:48 am. and 9:01 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: 22 for grass (a reading of more than 7 is considered to be undesirable). Local Temps., Humidity(TABLE) Time(COLUMN)T.(COLUMN)H. 12 m'night(COLUMN)72(COLUMN)59 1 a.m.(COLUMN)70(COLUMN)61 2 a.m.(COLUMN)69(COLUMN)66 3 a.m.(COLUMN)68(COLUMN)63 4 a.m.(COLUMN)68(COLUMN)63 5 a.m.(COLUMN)66(COLUMN)70 6 a.m.(COLUMN)65(COLUMN)75 7 a.m.(COLUMN)67(COLUMN)68 8 a.m.(COLUMN)69(COLUMN)63 9 a.m.(COLUMN)72(COLUMN)59 10 a.m.(COLUMN)75(COLUMN)56 11 a.m.(COLUMN)79(COLUMN)51 12 noon(COLUMN)81(COLUMN)53 1 p.m.(COLUMN)84(COLUMN)55 2 p.m.(COLUMN)86(COLUMN)53 3 p.m.(COLUMN)87(COLUMN)54 4 p.m.(COLUMN)88(COLUMN)52 5 p.m.(COLUMN)88(COLUMN)52 6 p.m.(COLUMN)87(COLUMN)56 7 p.m.(COLUMN)84(COLUMN)59(END TABLE) Temperatures ending 8 a.m. (EDT) yesterday:(TABLE) City(COLUMN)H.(COLUMN)L. Albany(COLUMN)84(COLUMN)60 Albuquerque(COLUMN)96(COLUMN)57 Amarillo(COLUMN)89(COLUMN)63 Anchorage(COLUMN)70(COLUMN)55 Asheville(COLUMN)81(COLUMN)63 Atlanta(COLUMN)83(COLUMN)68 Atlantic City(COLUMN)80(COLUMN)54 Austin(COLUMN)82(COLUMN)75 Baltimore(COLUMN)84(COLUMN)58 Billing s(COLUMN)65(COLUMN)40 Birmingham(COLUMN)86(COLUMN)72 Bismarck(COLUMN)66(COLUMN)46 Boise(COLUMN)73(COLUMN)53 Boston(COLUMN)81(COLUMN)59 Brownsville(COLUMN)94(COLUMN)78 Buffalo(COLUMN)79(COLUMN)68 Burlington, Vt.(COLUMN)85(COLUMN)69 Casper(COLUMN)69(COLUMN)38 Charleston, S.C.(COLUMN)84(COLUMN)72 Charlestn, W.V.(COLUMN)85(COLUMN)65 Charlotte(COLUMN)83(COLUMN)67 Cheyenne(COLUMN)71(COLUMN)38 Chicago(COLUMN)90(COLUMN)74 Cincinnati(COLUMN)85(COLUMN)67 Cleveland(COLUMN)87(COLUMN)69 Columbia, S.C.(COLUMN)85(COLUMN)62 Columbus(COLUMN)85(COLUMN)68 Dal.-Ft. Worth$95(COLUMN)75 Dayton(COLUMN)87(COLUMN)67 Denver(COLUMN)78(COLUMN)51 Des Moines(COLUMN)90(COLUMN)60 Detroit(COLUMN)88(COLUMN)70 Duluth(COLUMN)73(COLUMN)50 El Paso(COLUMN)101(COLUMN)65 Fairbanks(COLUMN)73(COLUMN)57 Fargo(COLUMN)65(COLUMN)42 Flagstaff(COLUMN)81(COLUMN)43 Great Falls(COLUMN)67(COLUMN)38 Hartford(COLUMN)85(COLUMN)59 Helena(COLUMN)70(COLUMN)40 Honolulu(COLUMN)87(COLUMN)74 Houston(COLUMN)92(COLUMN)77 Indianapolis(COLUMN)87(COLUMN)72 Jackson(COLUMN)87(COLUMN)74 Jacksonville(COLUMN)86(COLUMN)73 Juneau(COLUMN)72(COLUMN)46 Kansas City(COLUMN)92(COLUMN)61 Las Vegas(COLUMN)100(COLUMN)74 Little Rock(COLUMN)91(COLUMN)74 Los Angeles(COLUMN)81(COLUMN)63 Louisville(COLUMN)90(COLUMN)69 Memphis(COLUMN)90(COLUMN)77 Miami Beach(COLUMN)87(COLUMN)80 Midland(COLUMN)100(COLUMN)68 Milwaukee(COLUMN)91(COLUMN)70 Mpls.-St. Paul(COLUMN)80(COLUMN)56 Nashville(COLUMN)88(COLUMN)71 New Orleans(COLUMN)91(COLUMN)73 New York(COLUMN)80(COLUMN)62 Norfolk(COLUMN)80(COLUMN)55 North Platte(COLUMN)77(COLUMN)42 Okahoma City(COLUMN)89(COLUMN)69 Omaha(COLUMN)88(COLUMN)56 Orando(COLUMN)96(COLUMN)77 Philadelphia(COLUMN)85(COLUMN)62 Phoenix(COLUMN)109(COLUMN)73 Pittsburgh(COLUMN)86(COLUMN)68 Portland, ME.(COLUMN)71(COLUMN)51 Portland, Ore.(COLUMN)76(COLUMN)57 Providence(COLUMN)77(COLUMN)55 Raleigh(COLUMN)86(COLUMN)61 Rapid City(COLUMN)68(COLUMN)40 Reno(COLUMN)83(COLUMN)50 Richmond(COLUMN)84(COLUMN)55 St. Louis(COLUMN)90(COLUMN)75 St. Prbg.-Tmpa(COLUMN)93(COLUMN)74 Salt Lake City(COLUMN)72(COLUMN)46 San Antonio(COLUMN)93(COLUMN)77 San Diego(COLUMN)74(COLUMN)64 San Francisco(COLUMN)71(COLUMN)54 San Juan(COLUMN)89(COLUMN)73 St. Ste. Marie(COLUMN)77(COLUMN)59 Seattle(COLUMN)72(COLUMN)55 Shreveport(COLUMN)92(COLUMN)75 Sioux Falls(COLUMN)78(COLUMN)48 Spokane(COLUMN)70(COLUMN)50 Syracuse(COLUMN)85(COLUMN)69 Topeka(COLUMN)92(COLUMN)61 Tucson(COLUMN)102(COLUMN)68 Tulsa(COLUMN)91(COLUMN)72 Washington(COLUMN)87(COLUMN)65 Wichita(COLUMN)95(COLUMN)64(END TABLE) Temperatures Abroad Yesterday(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)Temp Aberdeen(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)48 Amsterdam(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)57 Athens(COLUMN)clear(COLUMN)2 p.m.(COLUMN)84 Auckland(COLUMN)clear(COLUMN)midnight(COLUMN)45 Berlin(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)55 Bermingham(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)59 Bonn(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)54 Brussels(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)55 Cairo(COLUMN)clear(COLUMN)2 p.m.(COLUMN)93 Casablanca(COLUMN)cloudy(COLUMN)noon(COLUMN)68 Copenhagen(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)54 Dublin(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)59 Geneva(COLUMN)clear(COLUMN)1 p.m.(COLUMN)68 Hong Kong(COLUMN)clear(COLUMN)8 p.m.(COLUMN)84 Jerusalem(COLUMN)clear(COLUMN)2 p.m.(COLUMN)82 Lisbon(COLUMN)cloudy(COLUMN)noon(COLUMN)64 London(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)57 Madrid(COLUMN)clear(COLUMN)1 p.m.(COLUMN)77 Malta(COLUMN)pt. cldy.(COLUMN)8 p.m.(COLUMN)81 Manila(COLUMN)pt. cldy.(COLUMN)8 p.m.(COLUMN)81 Moscow(COLUMN)cloudy(COLUMN)3 p.m.(COLUMN)63 New Delhi(COLUMN)clear(COLUMN)5 p.m.(COLUMN)97 Nice(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)72 Oslo(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)64 Paris(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)64 Peking(COLUMN)pt. cldy.(COLUMN)8 p.m.(COLUMN)79 Rome(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)77 Sofia(COLUMN)clear(COLUMN)2 p.m.(COLUMN)79 Stockholm(COLUMN)rain(COLUMN)1 p.m.(COLUMN)54 Sydney(COLUMN)cloudy(COLUMN)10 p.m.(COLUMN)52 Tunis(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)82 Vienna(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)68 Warsaw(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)52(END TABLE) Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)cloudy(COLUMN)91(COLUMN)79 Barbados(COLUMN)cloudy(COLUMN)86(COLUMN)79 Bermuda(COLUMN)pt. cldy(COLUMN)75(COLUMN)68 Bogota(COLUMN)cloudy(COLUMN)64(COLUMN)49 Calgary(COLUMN)clear(COLUMN)63(COLUMN)36 Edmonton(COLUMN)pt. cldy.(COLUMN)63(COLUMN)45 Havana(COLUMN)fair(COLUMN)90(COLUMN)75 Kingston(COLUMN)fair(COLUMN)90(COLUMN)77 Montoeo Bay(COLUMN)pt. cldy.(COLUMN)86(COLUMN)73 Mexico City(COLUMN)Cloudy(COLUMN)79(COLUMN)55 Monterrey(COLUMN)clear(COLUMN)96(COLUMN)73 Montreal(COLUMN)clear(COLUMN)82(COLUMN)63 Nassau(COLUMN)cloudy(COLUMN)90(COLUMN)73 Ottawa(COLUMN)clear(COLUMN)81(COLUMN)63 Regina(COLUMN)pt. cldy.(COLUMN)66(COLUMN)39 St. Kitts(COLUMN)pt. cldy.(COLUMN)89(COLUMN)77 St. Thomas(COLUMN)fair(COLUMN)90(COLUMN)75 Toronto(COLUMN)clear(COLUMN)82(COLUMN)66 Vancouver(COLUMN)cloudy(COLUMN)66(COLUMN)50 Veracruz(COLUMN)haze(COLUMN)86(COLUMN)77 Winnipeg(COLUMN)pt. cldy.(COLUMN)54(COLUMN)41(END TABLE)