WASHINGTON: Today - Partly cloudy, high in 70s, low from low 50s to around 60. Chance of rain is 70 percent today and 20 percent tonight. Winds will be southerly at 10 mph. Monday - Sunny and pleasant, high in 70s.

Maryland and Virginia: Partly cloudy, high in mid 60s to upper 70s, low in 50s. Monday - Sunny, highs in mid 70s to near 80.

Lower Potomac and Chesapeake Bay: Today - partly cloudy, visibility less five miles in showers and morning fog. Winds will be northerly at 1 to 15 knots. Waves in unprotected waters will be 2 feet.

Today - Partly cloudy, high in 70s, low in 50s. Chance of rain is 70 percent today and 20 percent tonight. Monday - Sunny, high in 70s. Yesterday - 10 a.m. AQI: 19; temp. range: 75-52. Details on B2.

Extended Area Outlook for Tuesday through Thursday: Partly cloudy with a chance of showers late Wednesday or Thursday. Highs will be in the 70s and lows in the 50s. Normal Washington temperatures for the period will be a high of 74 and low of 54.

The Nation Yesterday: Cloudy skies and showers continued continued throughout the eastern third of the nation. The heaviest showers were concentrated in the southeastern corner, from the Mobile area of Alabama to northern Florida. Thundershowers were widely scattered through the middle Atlantic Coast states, the Ohio Valley, and the upper Mississippi Valley. West of the Mississipi there was hardly a cloud in the sky. The northern Plains recovered rapidly from the freezing temperatures with highs in the 60s. The Plains, northern Texas, and most of the Rockies had mild temperatures. Showers spread across the Pacific northwest ahead of a cold front. Cloudy skies covered most of Montana and Idaho. Only small amounts of rain were recorded, Astoria. The southwestern edge of the nation was sunny and warm. Southern Arizona and southern California temperatures were already approaching 100. Light flooding hit Presidio earlier this week with another flood crest was rolling down the Rio Conchos. New England was partly sunny and still cool, in the 50s at a few places in northern Maine. A cold front was keeping the Great Lakes region cloudy and cool.

The National weather forecasts for today - Most of the nation will enjoy a sunny and mild day. Scattered thundershowers will spread through the Atlantic seaboard ahead of the cold front from Ohio, eastern Tennessee, and Georgia, to the Atlantic. A few showers will develop over Montana. The deserts of southern Arizona and southern California will be hot, in the 100s. The temperatures will continue cool through the northern third of the nation, mostly in the 60s.

The Council of Government's Air Quality Index for yesterday showed the high reading in the Washington area during the 10 a.m. period was 19. Index values between 0 and 25 indicate good 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 good.

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

Almanac Data for today: The sun rises 7:04 a.m., sets 6:51 p.m.; moon rises 6:19 a.m., sets 6:40 p.m. Tides: high 8:09 a.m. and 8:33 p.m., low 2:39 a.m. and 2:58 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).

Washington data for yesterday: Highest temperature since midnight yesterday, 75 degrees at 2:35 p.m. Lowest temperature since midnight, 52 degrees at 6:25 a.m. Excess of temperature since Sept. 1, 97 degrees. Excess of temperature since Jan. 1, 95 degrees. Record high temperature for today, 93 degrees in 1927.Record low temperature for today, 36 degrees in 1899. Relative humidity maximum, 86 percent at 7 a.m.; minimum, 42 percent at 3 p.m. Deficiency of precipitation since Sept. 1, 1.85 inches. Excess of precipitation since Jan. 1, 1.80 inches. Highest observed wind since 8 a.m., 10 miles per hour from the south at 1 p.m. Peak wind since 8 a.m., 21 miles per hour from the southeast at 3:54 p.m. Local Temps., Humidity(TABLE) Time(COLUMN)T.(COLUMN)H. 12 midn.(COLUMN)59(COLUMN)62 1 a.m.(COLUMN)57(COLUMN)72 2 a.m.(COLUMN)56(COLUMN)77 3 a.m.(COLUMN)56(COLUMN)77 4 a.m.(COLUMN)44(COLUMN)86 5 a.m.(COLUMN)55(COLUMN)83 6 a.m.(COLUMN)53(COLUMN)83 7 a.m.(COLUMN)52(COLUMN)86 8 a.m.(COLUMN)56(COLUMN)74 9 a.m.(COLUMN)57(COLUMN)72 10 a.m.(COLUMN)59(COLUMN)69 11 a.m.(COLUMN)64(COLUMN)60 12 noon(COLUMN)68(COLUMN)57 1 p.m.(COLUMN)70(COLUMN)53 2 p.m.(COLUMN)73(COLUMN)44 3 p.m.(COLUMN)75(COLUMN)42 4 p.m.(COLUMN)75(COLUMN)43 5 p.m.(COLUMN)75(COLUMN)42 6 p.m.(COLUMN)72(COLUMN)48 7 p.m.(COLUMN)71(COLUMN)51 8 p.m.(COLUMN)68(COLUMN)59 9 p.m.(COLUMN)66(COLUMN)65 10 p.m.(COLUMN)67(COLUMN)63 11 p.m.(COLUMN)66(COLUMN)68(END TABLE) Temperatures ending 8 p.m. (EDT) yesterday(TABLE) City(COLUMN)L.(COLUMN)H. Albany(COLUMN)34(COLUMN)67 Albuquerque(COLUMN)59(COLUMN)82 Amarillo(COLUMN)51(COLUMN)75 Anchorage(COLUMN)30(COLUMN)53 Asheville(COLUMN)55(COLUMN)62 Atlanta(COLUMN)60(COLUMN)71 Atlantic City(COLUMN)56(COLUMN)66 Austin(COLUMN)61(COLUMN)90 Baltimore(COLUMN)43(COLUMN)74 Billings(COLUMN)45(COLUMN)76 Birmingham(COLUMN)62(COLUMN)75 Bismarck(COLUMN)31(COLUMN)71 Boise(COLUMN)50(COLUMN)83 Boston(COLUMN)46(COLUMN)68 Brownsville(COLUMN)68(COLUMN)88 Buffalo(COLUMN)49(COLUMN)75 Burlington(COLUMN)44(COLUMN)66 Casper(COLUMN)32(COLUMN)78 Charleston, S.C.(COLUMN)55(COLUMN)73 Charleston W.Va.(COLUMN)57(COLUMN)78 Charlotte(COLUMN)57(COLUMN)65 Cheyenne(COLUMN)38(COLUMN)71 Chicago(COLUMN)58(COLUMN)69 Cincinnati(COLUMN)55(COLUMN)75 Cleveland(COLUMN)52(COLUMN)80 Columbia, S.C.(COLUMN)60(COLUMN)72 Columbus(COLUMN)53(COLUMN)77 Dal. Ft. Worth(COLUMN)59(COLUMN)92 Dayton(COLUMN)52(COLUMN)73 Denver(COLUMN)41(COLUMN)80 Des Moines(COLUMN)51(COLUMN)68 Detroit(COLUMN)48(COLUMN)71 Duluth(COLUMN)49(COLUMN)61 El Paso(COLUMN)56(COLUMN)86 Fairbanks(COLUMN)28(COLUMN)40 Fargo(COLUMN)36(COLUMN)69 Flagstaff(COLUMN)39(COLUMN)82 Great Falls(COLUMN)40(COLUMN)75 Hartford(COLUMN)32(COLUMN)68 Helena(COLUMN)37(COLUMN)75 Honolulu(COLUMN)72(COLUMN)87 Houston(COLUMN)68(COLUMN)86 Indianapolis(COLUMN)53(COLUMN)71 Jackson, Miss.(COLUMN)60(COLUMN)81 Jacksonville(COLUMN)72(COLUMN)80 Juneau(COLUMN)43(COLUMN)50 Kansas City(COLUMN)51(COLUMN)67 Las Vegas(COLUMN)67(COLUMN)101 Little Rock(COLUMN)65(COLUMN)82 Los Angeles(COLUMN)70(COLUMN)86 Louisville(COLUMN)59(COLUMN)74 Memphis(COLUMN)66(COLUMN)83 Miami Beach(COLUMN)81(COLUMN)85 Midland-Odessa(COLUMN)53(COLUMN)80 Milwaukee(COLUMN)58(COLUMN)63 Mpls. St. Paul(COLUMN)54(COLUMN)66 Nashville(COLUMN)62(COLUMN)83 New Orleans(COLUMN)71(COLUMN)85 New York(COLUMN)50(COLUMN)69 Norfolk(COLUMN)53(COLUMN)77 North Platte(COLUMN)31(COLUMN)77 Oklahoma City(COLUMN)63(COLUMN)84 Omaha(COLUMN)49(COLUMN)66 Orlando(COLUMN)75(COLUMN)90 Philadelphia(COLUMN)45(COLUMN)72 Phoenix(COLUMN)73(COLUMN)104 Pittsburgh(COLUMN)49(COLUMN)75 Portland, Me.(COLUMN)35(COLUMN)65 Portland, Ore.(COLUMN)56(COLUMN)67 Providence(COLUMN)39(COLUMN)64 Raleigh(COLUMN)52(COLUMN)72 Rapid City(COLUMN)36(COLUMN)80 Reno(COLUMN)39(COLUMN)89 Richmond(COLUMN)48(COLUMN)77 St. Louis(COLUMN)61(COLUMN)67 St. Prbg-Tampa(COLUMN)73(COLUMN)85 Salt Lake City(COLUMN)46(COLUMN)79 San Antonio(COLUMN)58(COLUMN)89 San Diego(COLUMN)69(COLUMN)79 San Francisco(COLUMN)53(COLUMN)72 San Juan. PR(COLUMN)78(COLUMN)89 St. Ste. Marie(COLUMN)49(COLUMN)56 Seattle(COLUMN)57(COLUMN)67 Shreveport(COLUMN)60(COLUMN)86 Sioux Falls(COLUMN)43(COLUMN)66 Spokane(COLUMN)48(COLUMN)67 Syracuse(COLUMN)44(COLUMN)70 Topeka(COLUMN)50(COLUMN)68 Tucson(COLUMN)70(COLUMN)98 Tulsa(COLUMN)61(COLUMN)82 Washington(COLUMN)52(COLUMN)75 Wichita(COLUMN)53(COLUMN)74(END TABLE) Temperatures Abroad Yesterday(TABLE) City(COLUMN)Weath.(COLUMN)Time(COLUMN)Temp. Aberdeen(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN)54 Amsterdam(COLUMN)rain(COLUMN)1 p.m.(COLUMN)52 Ankara(COLUMN)pt. cldy(COLUMN)3 p.m.(COLUMN)55 Athens(COLUMN)clear(COLUMN)2 p.m.(COLUMN)75 Auckland(COLUMN)clear(COLUMN)12 a.m.(COLUMN)50 Berlin(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)55 Birmingham(COLUMN)rain(COLUMN)1 p.m.(COLUMN)50 Bonn(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)54 Brussels(COLUMN)rain(COLUMN)1 p.m.(COLUMN)48 Casablanca(COLUMN)cloudy(COLUMN)12 p.m.(COLUMN)75 Copenhagen(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)52 Dublin(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)54 Geneva(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)55 Hong Kong(COLUMN)rain(COLUMN)8 p.m.(COLUMN)75 Jerusalem(COLUMN)clear(COLUMN)2 p.m.(COLUMN)73 Lisbon(COLUMN)clear(COLUMN)12 p.m.(COLUMN)75 London(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)52 Madrid(COLUMN)clear(COLUMN)1 p.m.(COLUMN)73 Malta(COLUMN)c lear(COLUMN)1 p.m.(COLUMN)79 Manila(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)81 Moscow(COLUMN)rain(COLUMN)3 p.m.(COLUMN)50 New Delhi(COLUMN)clear(COLUMN)5 p.m.(COLUMN)90 Nice(COLUMN)clear(COLUMN)1 p.m.(COLUMN)75 Oslo(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)48 Paris(COLUMN)rain(COLUMN)1 p.m.(COLUMN)48 Peking(COLUMN)clear(COLUMN)8 p.m.(COLUMN)70 Rome(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)75 Saigon(COLUMN)rain(COLUMN)8 p.m.(COLUMN)77 Sofia(COLUMN)clear(COLUMN)2 p.m.(COLUMN)64 Stockholm(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)46 Sydney(COLUMN)clear(COLUMN)10 p.m.(COLUMN)55 Tokyo(COLUMN)pt. cldy(COLUMN)9 p.m.(COLUMN)68 Vienna(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)55 Warsaw(COLUMN)rain(COLUMN) 1 p.m.(COLUMN)54(END TABLE) Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)fair(COLUMN)88(COLUMN)77 Barbados(COLUMN)fair(COLUMN)88(COLUMN)72 Bermuda(COLUMN)cloudy(COLUMN)83(COLUMN)76 Bogota(COLUMN)cloudy(COLUMN)67(COLUMN)50 Calgary(COLUMN)cloudy(COLUMN)66(COLUMN)46 Culiacan(COLUMN)pt. cldy(COLUMN)95(COLUMN)75 Edmonton(COLUMN)cloudy(COLUMN)69(COLUMN)37 Havana(COLUMN)pt. cldy(COLUMN)87(COLUMN)75 Kingston(COLUMN)fair(COLUMN)89(COLUMN)78 Montego Bay(COLUMN)fair(COLUMN)86(COLUMN)73 Mexico City(COLUMN)haze(COLUMN)70(COLUMN)59 Monterrey(COLUMN)pt. cldy(COLUMN)83(COLUMN)64 Montreal(COLUMN)cloudy(COLUMN)61(COLUMN)48 Nassau(COLUMN)fair(COLUMN)88(COLUMN)72 Ottawa(COLUMN)pt. cldy(COLUMN)61(COLUMN)46 Regina(COLUMN)pt. cldy(COLUMN)66(COLUMN)39 St. Kitts(COLUMN)pt. cldy(COLUMN)90(COLUMN)75 Toronto(COLUMN)pt. cldy(COLUMN)59(COLUMN)41 Vancouver(COLUMN)rain(COLUMN)64(COLUMN)57 Vera Cruz(COLUMN)cloudy(COLUMN)86(COLUMN)72 Winnipeg(COLUMN)pt. cldy(COLUMN)57(COLUMN)37(END TABLE)