Washington: Today - Partly cloudy, high in the mid 80s, low in the mid 50s. The chance of rain is 20 percent today and 10 percent tonight. Wind will be from the northwest at from 5 to 15 mph. Monday - Sunny, high in the mid 70s.

Maryland and Virginia: Today - Partly cloudy, highs from the 70s to the 80s, lows in the 60s. Monday - Sunny, highs from the 60s to the low 70s.

Lower Potomac and Chesapeake Bay: Today - Partly cloudy, with visibility of more than 5 miles. Wind will be from the southwest at from 5 to 12 knots this morning. shifting to from the northwest tonight. Waves in unprotected waters will be near 1 foot.

Extended Area Forecast for Tuesday through Thursday: Partly cloudy through the period with little or no rain. Highs will be from the 70s, to the mid 80s, lows from the mid 50s to the mid 60s. Normal Washington temperatures for the period are a high of 79 and a low of 58.

The National Weather Forecast for today - showers and occasional thundershowers will extend from Texas through Oklahoma and Akkansas as well as into southern Colorado. Showers will also extend over New England and southern Florida. Temperatures will be warm over the Gulf Coast through the Atlantic Coast, from North Carolina through Florida. It will be cool over the Great Lakes and a portion of the central Pains. Temperatures over the remainder of the nation will be seasonably mild.

The Council of Governments Air Quality Index for yesterday showed the high reading in the Washington area during the 1 p.m. period was 105 for the pollutant, photochemical oxidants. 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 be near 6 feet today.

Almanac Data for today: The sun rises 5:51 a.m., sets 8:19 p.m, moon rises 6:26 p.m., sets 5:20 a.m. Tides: high 7:43 a.m. and 8:11 p.m., low 2:02 a.m. and 2:44 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). Local Temps., Humidity(TABLE) Time(COLUMN)T.(COLUMN)H. 12 midnite(COLUMN)63(COLUMN)78 1 a.m.(COLUMN)62(COLUMN)84 2 a.m.(COLUMN)61(COLUMN)87 3 a.m.(COLUMN)61(COLUMN)87 4 a.m.(COLUMN)61(COLUMN)84 5 a.m.(COLUMN)60(COLUMN)87 6 a.m.(COLUMN)60(COLUMN)84 7 a.m.(COLUMN)62(COLUMN)78 8 a.m.(COLUMN)64(COLUMN)75 9 a.m.(COLUMN)68(COLUMN)68 10 a.m.(COLUMN)72(COLUMN)59 11 a.m.(COLUMN)77(COLUMN)52 12 noon(COLUMN)80(COLUMN)49 1 p.m.(COLUMN)83(COLUMN)49 2 p.m.(COLUMN)84(COLUMN)51 3 p.m.(COLUMN)85(COLUMN)51 4 p.m.(COLUMN)86(COLUMN)47 5 p.m.(COLUMN)84(COLUMN)48 6 p.m.(COLUMN)81(COLUMN)51(END TABLE) Temperatures ending 8 a.m. (EDT) yesterday:(TABLE) City(COLUMN)H.(COLUMN)L. Albany(COLUMN)79(COLUMN)51 Albuquerque(COLUMN)87(COLUMN)61 Amarillo(COLUMN)90(COLUMN)55 Anchorage(COLUMN)56(COLUMN)35 Asheville(COLUMN)81(COLUMN)48 Atlanta(COLUMN)83(COLUMN)58 Altantic City(COLUMN)64(COLUMN)56 Austin(COLUMN)92(COLUMN)72 Baltimore(COLUMN)78(COLUMN)56 Bilings(COLUMN)60(COLUMN)43 Birmingham(COLUMN)82(COLUMN)56 Bismarck(COLUMN)56(COLUMN)35 Boise(COLUMN)73(COLUMN)47 Boston(COLUMN)69(COLUMN)57 Brownsville(COLUMN)93(COLUMN)78 Buffalo(COLUMN)71(COLUMN)55 Burlington(COLUMN)80(COLUMN)56 Casper(COLUMN)55(COLUMN)33 Charleston, S.C.(COLUMN)83(COLUMN)67 Charleston, W.Va.(COLUMN)85(COLUMN)55 Charlotte(COLUMN)86(COLUMN)60 Cheyenne(COLUMN)63(COLUMN)39 Chicago(COLUMN)83(COLUMN)64 Cincinnati(COLUMN)83(COLUMN)54 Cleveland(COLUMN)83(COLUMN)59 Columbia, S.C.(COLUMN)86(COLUMN)55 Columbus, Ohio(COLUMN)82(COLUMN)54 Dal.-Ft. Worth(COLUMN)93(COLUMN)70 Dayton(COLUMN)84(COLUMN)58 Denver(COLUMN)71(COLUMN)48 Des Moines(COLUMN)82(COLUMN)57 Detroit(COLUMN)85(COLUMN)57 Duluth(COLUMN)79(COLUMN)50 El Paso(COLUMN)93(COLUMN)62 Fairbanks(COLUMN)60(COLUMN)40 Fargo(COLUMN)64(COLUMN)39 Flagstaff(COLUMN)74(COLUMN)36 Great Falls(COLUMN)65(COLUMN)44 Hartford(COLUMN)81(COLUMN)54 Helena(COLUMN)67(COLUMN)41 Honolulu(COLUMN)85(COLUMN)76 Houston(COLUMN)85(COLUMN)75 Indianapolis(COLUMN)86(COLUMN)62 Jackson, Miss.(COLUMN)83(COLUMN)65 Jacksonville(COLUMN)86(COLUMN)67 Juneau(COLUMN)51(COLUMN)39 Kansas City(COLUMN)84(COLUMN)62 Las Vegas(COLUMN)94(COLUMN)59 Little Rock(COLUMN)83(COLUMN)66 Los Angeles(COLUMN)88(COLUMN)58 Louisville(COLUMN)84(COLUMN)57 Memphis(COLUMN)83(COLUMN)65 Miami Beach(COLUMN)82(COLUMN)73 Midland-Odessa(COLUMN)89(COLUMN)60 Milwaukee(COLUMN)78(COLUMN)63 Mpls-St. Paul(COLUMN)89(COLUMN)55 Nashville(COLUMN)84(COLUMN)55 New Orleans(COLUMN)87(COLUMN)67 New York(COLUMN)80(COLUMN)64 Norfolk(COLUMN)77(COLUMN)58 North Platte(COLUMN)77(COLUMN)44 Oklahoma City(COLUMN)89(COLUMN)63 Omaha(COLUMN)86(COLUMN)53 Orlando(COLUMN)91(COLUMN)71 Philadelphia(COLUMN)78(COLUMN)56 Phoenix(COLUMN)97(COLUMN)68 Pittsburgh(COLUMN)84(COLUMN)56 Portland, Me.(COLUMN)68(COLUMN)49 Portland, Ore.(COLUMN)81(COLUMN)53 Providence(COLUMN)71(COLUMN)52 Raleigh(COLUMN)83(COLUMN)53 Rapid City(COLUMN)64(COLUMN)40 Reno(COLUMN)77(COLUMN)36 Richmond(COLUMN)82(COLUMN)52 St. Louis(COLUMN)80(COLUMN)65 St. Prbg-Tampa(COLUMN)88(COLUMN)70 Salt Lake City(COLUMN)73(COLUMN)46 San Antonio(COLUMN)87(COLUMN)74 San Diego(COLUMN)82(COLUMN)67 San Francisco(COLUMN)85(COLUMN)51 San Juan(COLUMN)86(COLUMN)75 St. Ste. Marie(COLUMN)85(COLUMN)54 Seattle(COLUMN)79(COLUMN)53 Shreveport(COLUMN)90(COLUMN)68 Sioux Falls(COLUMN)80(COLUMN)47 Spokane(COLUMN)74(COLUMN)51 Syracuse(COLUMN)77(COLUMN)54 Topeka(COLUMN)88(COLUMN)63 Tucson(COLUMN)93(COLUMN)65 Tulsa(COLUMN)88(COLUMN)67 Washington(COLUMN)80(COLUMN)60 Wichita(COLUMN)84(COLUMN)64(END TABLE) Temperatures Abroad Yesterday(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)Temp. Aberdeen(COLUMN)clear(COLUMN)1 p.m.(COLUMN)54 Amsterdam(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)55 Ankara(COLUMN)clear(COLUMN)3 p.m.(COLUMN)66 Athens(COLUMN)clear(COLUMN)2 p.m.(COLUMN)77 Auckland(COLUMN)clear(COLUMN)midnight(COLUMN)48 Berlin(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)72 Birmingham(COLUMN)clear(COLUMN)1 p.m.(COLUMN)59 Brussels(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)57 Mairo(COLUMN)clear(COLUMN)2 p.m.(COLUMN)86 Casablanca(COLUMN)pt. cldy.(COLUMN)noon(COLUMN)52 Copenhagen(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)66 Dublin(COLUMN)clear(COLUMN)1 p.m.(COLUMN)59 Geneva(COLUMN)clear(COLUMN)1 p.m.(COLUMN)64 Hong Kong(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)75 Jerusalem(COLUMN)clear(COLUMN)2 p.m.(COLUMN)75 Lisbon(COLUMN)pt. cldy.(COLUMN)noon(COLUMN)61 London(COLUMN)clear(COLUMN)1 p.m.(COLUMN)63 Madrid(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)68 Malta(COLUMN)clear(COLUMN)1 p.m.(COLUMN)77 Manila(COLUMN)pt. cldy.(COLUMN)8 p.m.(COLUMN)81 Moscow(COLUMN)pt. cldy.(COLUMN)3 p.m.(COLUMN)64 New Delhi(COLUMN)clear(COLUMN)5 p.m.(COLUMN)109 Nice(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)66 Oslo(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)64 Paris(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)55 Peking(COLUMN)pt. cldy.(COLUMN)8 p.m.(COLUMN)77 Rome(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)70 SaiHgon(COLUMN)pt. cldy.(COLUMN)8 p.m.(COLUMN)91 Sofia(COLUMN)rain(COLUMN)2 p.m.(COLUMN)64 Stockholm(COLUMN)clear(COLUMN)1 p.m.(COLUMN)70 Sydney(COLUMN)pt. cldy.(COLUMN)10 p.m.(COLUMN)66 Tokyo(COLUMN)cloudy(COLUMN)9 p.m.(COLUMN)64 Tunis(COLUMN)clear(COLUMN)1 p.m.(COLUMN)84 Vienna(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)63 Warsaw(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)70(END TABLE) Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)clear(COLUMN)86(COLUMN)75 Barbados(COLUMN)pt. cldy.(COLUMN)88(COLUMN)79 Bermuda(COLUMN)rain(COLUMN)77(COLUMN)72 Bogota(COLUMN)pt. cldy.(COLUMN)68(COLUMN)37 Edmonton(COLUMN)clear(COLUMN)73(COLUMN)46 Havana(COLUMN)fair(COLUMN)84(COLUMN)72 Kingston(COLUMN)pt. cldy.(COLUMN)88(COLUMN)79 Montego Bay(COLUMN)cloudy(COLUMN)88(COLUMN)75 Mexico City(COLUMN)pt. cldy.(COLUMN)81(COLUMN)59 Monterrey(COLUMN)fair(COLUMN)91(COLUMN)70 Montreal(COLUMN)pt. cldy.(COLUMN)79(COLUMN)57 Nassau(COLUMN)cloudy(COLUMN)88(COLUMN)70 Ottawa(COLUMN)pt. cldy.(COLUMN)88(COLUMN)55 Regina(COLUMN)clear(COLUMN)68(COLUMN)41 St. Kitts(COLUMN)pt. cldy.(COLUMN)86(COLUMN)77 Toronto(COLUMN)cloudy(COLUMN)82(COLUMN)54 Vancouver(COLUMN)clear(COLUMN)68(COLUMN)52 Veracruz(COLUMN)pt. cldy.(COLUMN)88(COLUMN)75 Winnipeg(COLUMN)clear(COLUMN)54(COLUMN)32(END TABLE)