Washington: Today - Cool with rain likely by afternoon, high in the mid 60s, low near 50. The chance of rain is 70 per cent, Sunday - Clearing, high in the low 70s.

Maryland: Today - Rain likely by afternoon, high in the mid 60s, low in the upper 40s to low 60s. Sunday - Clearing, high in the 60s.

Virginia: Today - Rain likely by afternoon, high in the 60s, low in the upper 40s to mid 50s. Sunday - Clearing, high near 70.

Lower Potomac and Chesepeake Bay: Rain, Winds will become southeasterly at 10 to 18 knots. Waves will reach 2 feet by afternoon. Visibility will be 1 to 3 miles, diminshing to less than 1 mile in showers.

Extended Area Outlook for Monday through Wednesday: Chance of rain Tuesday, otherwise fair through the period. Highs will range from the 60s to mid 70s, lows from the mid 40s to the mid 50s. Normal Washington temperatures for the period are a high of 72 and a low of 52.

West Virginia: Today - Windy with showers ending by night fall, high near 70, lows from the mid 40s to mid 50s. Sunday - Partly cloudy and mild, high in the 60s.

The National Weather Forecast for Today - There will be scattered showers over most of the Pacific Northwest, and over much of the nation from the Mississippi Valley eastward except for northern New England, and most of the Carolinas through eastern Georgia into northern Florida. Isolated thunderstorms are possible over the lower Ohio and lower Mississippi Valleys, and there may be some isolated snow showers in the northern Rockies. Temperatures will be warm along the California coast and over much of Florida. Mild conditions can be expected from central Texas through Georgia and South Carolina. Most of the remainder of the nation will be cool.

The Council of Governments' Air Quality Index for yesterday showed the high reading in the Washington area during the 3 p.m. period was 20 for the pollutant, photochemical oxidants. Index values between 0 and 24 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 about the same.

The National Weather Service forecasts the Potomac River stage at Little Falls should remain near 2.8 feet today.

ALMANAC DATA FOR today: Sun rises 7:09 a.m. sets 6:42 p.m.; Moon rises 1:40 a.m. sets 3:35 p.m. Tides: High 3:49 a.m. and 4:23 p.m. Low 11:04 a.m. and 11:22 p.m. High and low tides at the following locations can be obtained by subtracting the hours indicated from the tides above. Annapolis (1 1/4); Bloody Point Lighthouse (4 1/2); Deale, Md. (4 1/2); Colonial Beach (6); Norfolk (1 1/2); Virginia Beach (1). Solomons Island (6 1/2); Point Lookout (7). Pollen Count 12 raquced (note: More than 7 is considered undesirable.) Local Temp. Humidity

(TABLE) Time(COLUMN).(COLUMN)H.D 12 midnite(COLUMN)56(COLUMN)11 1 a.m.(COLUMN)55(COLUMN)81 2 a.m.(COLUMN)54(COLUMN)72 3 a.m.(COLUMN)53(COLUMN)63 4 a.m.(COLUMN)52(COLUMN)64 5 a.m.(COLUMN)51(COLUMN)66 6 a.m.(COLUMN)49(COLUMN)71 7 a.m.(COLUMN)49(COLUMN)66 8 a.m.(COLUMN)50(COLUMN)66 9 a.m.(COLUMN)53(COLUMN)64 10 a.m.(COLUMN)60(COLUMN)44 11 a.m.(COLUMN)62(COLUMN)28 12 noon(COLUMN)64(COLUMN)33 1 p.m.(COLUMN)65(COLUMN)32 2 p.m.(COLUMN)66(COLUMN)28 3 p.m.(COLUMN)66(COLUMN)29 4 p.m (COLUMN)66(COLUMN)28 5 p.m.(COLUMN)67(COLUMN)28 6 p.m.(COLUMN)65(COLUMN)29 7 p.m.(COLUMN)62(COLUMN)38 (END TABLE) Temperatures ending 8 a.m. (EDT) yesterday.

(TABLE) City(COLUMN)H.(COLUMN)L. Albany(COLUMN)65(COLUMN)32 Albuquerque(COLUMN)72(COLUMN)58 Amarillo(COLUMN)70(COLUMN)64 Ancharage(COLUMN)47(COLUMN)44 Asheville(COLUMN)69(COLUMN)47 Atlanta(COLUMN)46(COLUMN)53 Atlantic City(COLUMN)63(COLUMN)51 Austin(COLUMN)85(COLUMN)65 Baltimore(COLUMN)66(COLUMN)45 Billings(COLUMN)47(COLUMN)42 Birmingham(COLUMN)74(COLUMN)56 Bismarck(COLUMN)50(COLUMN)39 Bolse(COLUMN)70(COLUMN)48 Boston(COLUMN)61(COLUMN)45 Brownsville(COLUMN)89(COLUMN)75 Buffalo(COLUMN)59(COLUMN)43 Burlington, Vt.(COLUMN)61(COLUMN)40 Casper(COLUMN)68(COLUMN)43 Charleston, SC(COLUMN)79(COLUMN)58 Charllton, WVa(COLUMN)64(COLUMN)43 Charlotte(COLUMN)74(COLUMN)53 Chevenne(COLUMN)57(COLUMN)44 Chicago(COLUMN)58(COLUMN)46 Cincinnati(COLUMN)66(COLUMN)42 Cleveland(COLUMN)60(COLUMN)45 Columbia, S.C.(COLUMN)79(COLUMN)47 Columbus(COLUMN)62(COLUMN)35 Dal. Ft. Worth(COLUMN)82(COLUMN)62 dayton(COLUMN)62(COLUMN)38 Denver(COLUMN)56(COLUMN)46 Des Molnes(COLUMN)59 48 Detroit(COLUMN)60(COLUMN)37 Duluth(COLUMN)45(COLUMN)32 El Paso(COLUMN)81(COLUMN)64 Faircanks(COLUMN)46(COLUMN)27 Fargo(COLUMN)47(COLUMN)41 Flagstaff(COLUMN)60(COLUMN)48 Great Falls(COLUMN)55(COLUMN)41 Hartford(COLUMN)64(COLUMN)35 Helena(COLUMN)57(COLUMN)43 Honolulu(COLUMN)88(COLUMN)77 Houston(COLUMN)82(COLUMN)63 Indianapolis(COLUMN)63(COLUMN)43 Jackson(COLUMN)80(COLUMN)55 Jacksonville(COLUMN)80(COLUMN)57 Juneau(COLUMN)52(COLUMN)44 Kansas City(COLUMN)59(COLUMN)50 Las Vegas(COLUMN)88(COLUMN)65 Little Rock(COLUMN)68(COLUMN)55 Los Angeles(COLUMN)84(COLUMN)65 Louisville(COLUMN)68(COLUMN)47 Memphis(COLUMN)69(COLUMN)54 Miami Beach(COLUMN)81(COLUMN)71 Midland(COLUMN)81(COLUMN)68 Milwaukee(COLUMN)54(COLUMN)41 Mpls. St. Paul(COLUMN)51(COLUMN)38 Nashville(COLUMN)70(COLUMN)46 New Orleans(COLUMN)83(COLUMN)60 New York(COLUMN)61(COLUMN)49 Norfolk(COLUMN)78(COLUMN)62 North Platte(COLUMN)49(COLUMN)43 Okla City(COLUMN)71(COLUMN)64 Omana(COLUMN)57(COLUMN)45 Ontanco(COLUMN)86(COLUMN)67 Philadelphia(COLUMN)62(COLUMN)45 Phoenix(COLUMN)81(COLUMN)70 Pittsburgh(COLUMN)61(COLUMN)34 Portland, Me.(COLUMN)60(COLUMN)30 Portland, Ore.(COLUMN)63(COLUMN)52 Providence(COLUMN)63(COLUMN)40 Peach(COLUMN)76(COLUMN)51 Ralph City(COLUMN)58(COLUMN)44 Reno(COLUMN)68(COLUMN)27 Richmond(COLUMN)73(COLUMN)47 St. Louis(COLUMN)64(COLUMN)47 St. Prg. Tam.(COLUMN)86(COLUMN)67 Salt Lake City(COLUMN)72(COLUMN)44 San Antonio(COLUMN)85(COLUMN)63 San Diego(COLUMN)76(COLUMN)68 San Bran.(COLUMN)64(COLUMN)58 San Juan(COLUMN)84(COLUMN)75 St. Ste. Marie(COLUMN)50(COLUMN)27 Seamle(COLUMN)53(COLUMN)49 Shreveport(COLUMN)82(COLUMN)56 Sion Falls(COLUMN)52(COLUMN)44 Sparene(COLUMN)59(COLUMN)43 Simaquse(COLUMN)60(COLUMN)45 Tobena(COLUMN)63(COLUMN)51 Tunson(COLUMN)81(COLUMN)66 Tulsa(COLUMN)70(COLUMN)62 Washington(COLUMN)68(COLUMN)49 Wichta(COLUMN)58(COLUMN)55 Evandville(COLUMN)68(COLUMN)48(END TABLE) Temperatures Abroad Yesterday(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)Temp. Aberdeen(COLUMN)rain(COLUMN)1 p.m.(COLUMN)50 Amsterdam(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)64 Ankara(COLUMN)clear(COLUMN)3 p.m.(COLUMN)70 Athens(COLUMN)clear(COLUMN)2 p.m.(COLUMN)72 Auckland(COLUMN)clear(COLUMN)midnight(COLUMN)57 Berlin(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)68 Birmingham(COLUMN)cloudly(COLUMN)1 p.m.(COLUMN)54 Brussels(COLUMN)cloudly(COLUMN)1 p.m.(COLUMN)63 Cairo(COLUMN)clear(COLUMN)2 p.m.(COLUMN)93 Casablanca(COLUMN)pt. cldy.(COLUMN)noon(COLUMN)68 Copenhagen(COLUMN)cloudly(COLUMN)1 p.m.(COLUMN)54 Duplin(COLUMN)cloudly(COLUMN)1 p.m.(COLUMN)55 Geneva(COLUMN)rain(COLUMN)1 p.m.(COLUMN)59 Hong Kong(COLUMN)clear(COLUMN)8 p.m.(COLUMN)79 Lisbon(COLUMN)pt. cldy.(COLUMN)noon(COLUMN)63 London(COLUMN)cloudly(COLUMN)1 p.m.(COLUMN)55 Madrid(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)52 Malta(COLUMN)cloudly(COLUMN)1 p.m.(COLUMN)73 Manila(COLUMN)clear(COLUMN)8 p.m.(COLUMN)81 Moscow(COLUMN)cloudly(COLUMN)3 p.m.(COLUMN)46 New Delhi(COLUMN)clear(COLUMN)5 p.m.(COLUMN)91 Nice(COLUMN)rain(COLUMN)1 p.m.(COLUMN)70 Oslo(COLUMN)cloudly(COLUMN)1 p.m.(COLUMN)41 Paris(COLUMN)rain(COLUMN)1 p.m.(COLUMN)61 Peking(COLUMN)clear(COLUMN)8 p.m.(COLUMN)61 Rome(COLUMN)clear(COLUMN)1 p.m.(COLUMN)75 Saigon(COLUMN)rain(COLUMN)8 p.m.(COLUMN)82 Sofla(COLUMN)clear(COLUMN)2 P.m.(COLUMN)68 Stockholm(COLUMN)cloudly(COLUMN)1 p.m.(COLUMN)45 Sydney(COLUMN)clear(COLUMN)10 p.m.(COLUMN)59 Tel Aviv(COLUMN)clear(COLUMN)2 p.m.(COLUMN)86 Tokyo(COLUMN)cloudly(COLUMN)9 p.m.(COLUMN)68 Tunis(COLUMN)clear(COLUMN)1 p.m.(COLUMN)82 Vienna(COLUMN)clear(COLUMN)1 p.m.(COLUMN)66 Warsawe(COLUMN)clear(COLUMN)10 p.m.(COLUMN)52(END TABLE) Temperatures (Western Hemisphere)

(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)clear(COLUMN)90(COLUMN)79 Barbados(COLUMN)cloudly(COLUMN)86(COLUMN)75 Bermuda(COLUMN)pt. cldy.(COLUMN)75(COLUMN)70 Bogota(COLUMN)Pt. cldy.(COLUMN)57(COLUMN)45 Calgary(COLUMN)clear(COLUMN)48(COLUMN)23 Cullacan(COLUMN)clear(COLUMN)97(COLUMN)75 Edmonton(COLUMN)cloudy(COLUMN)46(COLUMN)36 Havana(COLUMN)pt. cldy.(COLUMN)86(COLUMN)72 Kingston(COLUMN)clear(COLUMN)90(COLUMN)73 Montego Bay(COLUMN)clear(COLUMN)88(COLUMN)77 Mexico City(COLUMN)haze(COLUMN)77(COLUMN)55 Monterrey(COLUMN)clear(COLUMN)81(COLUMN)70 Montreal(COLUMN)cloudy(COLUMN)57(COLUMN)28 Nassau(COLUMN)clear(COLUMN)84(COLUMN)73 Ottawa(COLUMN)clear(COLUMN)54(COLUMN)32 Regina(COLUMN)cloudy(COLUMN)48(COLUMN)39 St. Kitts(COLUMN)cloudy(COLUMN)89(COLUMN)72 St. Thomas(COLUMN)cloudy(COLUMN)86(COLUMN)76 Toronto(COLUMN)clear(COLUMN)55(COLUMN)36 Vancouver(COLUMN)cloudy(COLUMN)52(COLUMN)46 Veracruz(COLUMN)clear(COLUMN)88(COLUMN)$72 Winniped(COLUMN)cloudy(COLUMN)45(COLUMN)32(END TABLE)