Washington: Today - Partly cloudy, high in the mid 70s, low in the mid 40s. The chance of rain is near zero through tonight. Wind will be from the northwest at from 10 to 20 mph. Saturday - Fair, high in the upper 60s.

Maryland and Virginia: Today - Partly cloudy, highs from the 60s to the 70s, lows from the mid 40s to the low 50s. There is a chance of rain in eastern Maryland. Saturday - Fair highs from the 60s to near 70.

Lower Potomac and Chesapeake Bay: Today - Partly cloudy with visibility of more than 5 miles. Wind will be from the northwest at from 12 to 20 knots. Waves in unprotected waters will be near 2 feet.

Extended Area Forecast for Sunday through Tuesday: Rain is possible on Sunday and on Monday, clearing in Tuesday. Highs will be from the 60s to the mid 70s, lows from the 40s to the low 50s. Normal Washington temperatures for the period are a high of 65 and a low of 44.

West Virginia: Today - Partly cloudy, highs in the 60s, lows from the 30s to the low 40s. Saturday - Sunny, highs from the mid 60s to the mid 70s.

The National Weather Forecast for today - Rain, with snow over higher mountains, and will reach over Arizona, Utah, Nevada and Idaho. It will snow on Montana. Widely scattered rain will cover the Rockies and the eastern portions of Wyoming and Colorado. Rain will extend from northeastern Pennsylvania through most of New York State and New England. Elsewhere, partly cloudy skies will prevail. Cooler temperatures will cover the northern Rockies and the intermountain region, and cool temperatures will continue from North Dakota across the northern Great Lakes, New York and New England. Mild weather will continue elsewhere.

The Council og Governments' Air Quality Index for yesterday showed the high reading in the Washington area during the 2 p.m. to 3 p.m. period was 25 for the pollutant, photochemical oxidants. Index values between 25 and 49 indicate fair 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 be near 4.9 feet today. Local Temps., Humidity(TABLE) Time(COLUMN)T.(COLUMN)H. 12 mid.(COLUMN)52(COLUMN)50 1 a.m.(COLUMN)51(COLUMN)52 2 a.m.(COLUMN)50(COLUMN)54 3 a.m.(COLUMN)49(COLUMN)54 4 a.m.(COLUMN)49(COLUMN)54 5 a.m.(COLUMN)47(COLUMN)58 6 a.m.(COLUMN)46(COLUMN)63 7 a.m.(COLUMN)48(COLUMN)61 8 a.m.(COLUMN)49(COLUMN)58 9 a.m.(COLUMN)51(COLUMN)54 10 a.m.(COLUMN)52(COLUMN)32 11 a.m.(COLUMN)53(COLUMN)48 12 noon(COLUMN)55(COLUMN)49 1 p.m.(COLUMN)56(COLUMN)47 2 p.m.(COLUMN)57(COLUMN)44 3 p.m.(COLUMN)58(COLUMN)44 4 p.m.(COLUMN)57(COLUMN)47 5 p.m.(COLUMN)55(COLUMN)49 6 p.m.(COLUMN)54(COLUMN)53 7 p.m.(COLUMN)54(COLUMN)53(END TABLE) Temperatures ending 7 p.m. (EST) yesterday(TABLE) City(COLUMN)H.(COLUMN)L. Albany(COLUMN)44(COLUMN)31 Albuquerque(COLUMN)69(COLUMN)36 Amarillo(COLUMN)81(COLUMN)44 Anchorage(COLUMN)43(COLUMN)32 Asheville(COLUMN)81(COLUMN)46 Atlanta(COLUMN)86(COLUMN)57 Atlantic City(COLUMN)52(COLUMN)45 Austin(COLUMN)79(COLUMN)64 Baltimore(COLUMN)66(COLUMN)40 Billings(COLUMN)58(COLUMN)35 Birmingham(COLUMN)86(COLUMN)58 Bismarck(COLUMN)56(COLUMN)30 Boise(COLUMN)56(COLUMN)46 Boston(COLUMN)59(COLUMN)40 Brownsville(COLUMN)84(COLUMN)69 Buffalo(COLUMN)45(COLUMN)30 Burlington(COLUMN)44(COLUMN)33 Casper(COLUMN)59(COLUMN)35 Charleston, S.C.(COLUMN)89(COLUMN)62 Char'ston, WVa.(COLUMN)66(COLUMN)45 Charlotte(COLUMN)85(COLUMN)60 Chevenne(COLUMN)55(COLUMN)34 Chicago(COLUMN)58(COLUMN)45 Cincinnati(COLUMN)63(COLUMN)51 Cleveland(COLUMN)53(COLUMN)45 Columbia,S.C.(COLUMN)87(COLUMN)48 Columbus, Ohio(COLUMN)60(COLUMN)44 Dal.-Ft. Worth(COLUMN)75(COLUMN)60 Dayton(COLUMN)71(COLUMN)46 Denver(COLUMN)66(COLUMN)38 Des Moines(COLUMN)53(COLUMN)51 Detroit(COLUMN)57(COLUMN)40 Duluth(COLUMN)42(COLUMN)33 El Paso(COLUMN)75(COLUMN)47 Fairbanks(COLUMN)31(COLUMN)13 Fargo(COLUMN)48(COLUMN)41 Flagstaff(COLUMN)59(COLUMN)25 Great Falls(COLUMN)54(COLUMN)32 Hartford(COLUMN)54(COLUMN)35 Helena(COLUMN)58(COLUMN)32 Honolulu(COLUMN)83(COLUMN)71 Houston(COLUMN)83(COLUMN)67 Indianapolis(COLUMN)65(COLUMN)53 Jackson, Miss.(COLUMN)84(COLUMN)64 Jacksonville(COLUMN)87(COLUMN)57 Juneau(COLUMN)52(COLUMN)27 Kansas City(COLUMN)73(COLUMN)55 Las Vegas(COLUMN)72(COLUMN)50 Little Rock(COLUMN)84(COLUMN)63 Los Angeles(COLUMN)71(COLUMN)53 Louisville(COLUMN)69(COLUMN)58 Memphis(COLUMN)86(COLUMN)69 Miami Beach(COLUMN)77(COLUMN)73 Midland-Odessa(COLUMN)85(COLUMN)45 Milwaukee(COLUMN)48(COLUMN)39 Mpls.-St. Paul(COLUMN)52(COLUMN)44 Nashville(COLUMN)82(COLUMN)66 New Orleans(COLUMN)84(COLUMN)67 New York(COLUMN)55(COLUMN)42 Norfolk(COLUMN)74(COLUMN)48 North Platte(COLUMN)73(COLUMN)38 Oklahoma City(COLUMN)75(COLUMN)54 Omaha(COLUMN)63(COLUMN)49 Orlando(COLUMN)88(COLUMN)61 Philadelphia(COLUMN)63(COLUMN)34 phoenix(COLUMN)77(COLUMN)53 Pittsburgh(COLUMN)60(COLUMN)44 Portland, Maine(COLUMN)50(COLUMN)34 Portland, Ore.(COLUMN)53(COLUMN)36 Raleigh(COLUMN)82(COLUMN)51 Rapid City(COLUMN)68(COLUMN)32 Reno(COLUMN)54(COLUMN)43 Richmond(COLUMN)80(COLUMN)43 St. Louis(COLUMN)72(COLUMN)61 St. Prbg.-Tampa(COLUMN)84(COLUMN)63 Salt Lake City(COLUMN)55(COLUMN)45 San Antonio(COLUMN)79(COLUMN)64 San Diego(COLUMN)68(COLUMN)61 San Francisco(COLUMN)59(COLUMN)49 San Juan(COLUMN)84(COLUMN)75 St. Ste. Marle(COLUMN)40(COLUMN)28 Seattle(COLUMN)54(COLUMN)35 Shreveport(COLUMN)79(COLUMN)63 Sioux Falls(COLUMN)45(COLUMN)43 Spokane(COLUMN)50(COLUMN)34 Syracuse(COLUMN)51(COLUMN)28 Topeka(COLUMN)74(COLUMN)52 Tucson(COLUMN)73(COLUMN)48 Tulsa(COLUMN)72(COLUMN)58 Washington(COLUMN)69(COLUMN)46 Wichita(COLUMN)71(COLUMN)50(END TABLE) Temperatures Abroad Yesterday(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)Temp. Aberdeen(COLUMN)pt. cldy.(COLUMN) 1 p.m.(COLUMN)46 Amsterdan(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)45 Ankara(COLUMN)pt. cldy.(COLUMN) 3 p.m.(COLUMN)52 Athens(COLUMN)cloudy(COLUMN) 2 p.m.(COLUMN)63 Auckland(COLUMN)clear(COLUMN)midnight(COLUMN)57 Berlin(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)41 Birmingham(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN)45 Brussels(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)48 Casablanca(COLUMN)pt. cldy.(COLUMN)noon(COLUMN)61 Copenhagen(COLUMN)pt. cldy.(COLUMN) 1 p.m.(COLUMN)39 Dublin(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)46 Geneva(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN)45 Hong Kong(COLUMN)cloudy(COLUMN) 8 p.m.(COLUMN)66 Lisbon(COLUMN)clear(COLUMN)noon(COLUMN)61 London(COLUMN)clear(COLUMN) 1 p.m.(COLUMN) 50 Madrid(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN)54 Malta(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN)61 Manila(COLUMN)clear(COLUMN) 8 p.m.(COLUMN)84 Moscow(COLUMN)pt. cldy.(COLUMN) 3 p.m.(COLUMN)36 Nice(COLUMN)pt. cldy.(COLUMN) 1 p.m.(COLUMN)59 Oslo(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN)41 Paris(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)50 Peking(COLUMN)clear(COLUMN) 8 p.m.(COLUMN)59 Rome(COLUMN)rain(COLUMN) 1 p.m.(COLUMN)55 Sofia(COLUMN)pt. cldy.(COLUMN) 2 p.m.(COLUMN)52 Stockholm(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN)39 Sydney(COLUMN)clear(COLUMN)10 p.m.(COLUMN)68 Tel Aviv(COLUMN)cloudy(COLUMN) 2 p.m.(COLUMN)70 Tokyo(COLUMN)cloudy(COLUMN) 9 p.m.(COLUMN)55 Tunis(COLUMN)rain(COLUMN) 1 p.m.(COLUMN)61 Vienna(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)45 Warsaw(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)37(END TABLE) Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)fair(COLUMN)88(COLUMN)73 Barbados(COLUMN)pt. cldy.(COLUMN)84(COLUMN)73 Bermuda(COLUMN)rain(COLUMN)67(COLUMN)63 Bogota(COLUMN)pt. cldy.(COLUMN)72(COLUMN)54 Calgary(COLUMN)snow(COLUMN)46(COLUMN)21 Culiacan(COLUMN)fair(COLUMN)88(COLUMN)61 Edmonton(COLUMN)cloudy(COLUMN)41(COLUMN)23 Havana(COLUMN)fair(COLUMN)82(COLUMN)68 Kingston(COLUMN)clear(COLUMN)88(COLUMN)72 Montego Bay(COLUMN)clear(COLUMN)82(COLUMN)72 Mexico City(COLUMN)haze(COLUMN)82(COLUMN)52 Monterrey(COLUMN)pt. cldy.(COLUMN)84(COLUMN)66 Montreal(COLUMN)clear(COLUMN)37(COLUMN)25 Nassau(COLUMN)clear(COLUMN)81(COLUMN)64 Ottawa(COLUMN)clear(COLUMN)39(COLUMN)25 Regina(COLUMN)rain(COLUMN)48(COLUMN)36 St. Kitts(COLUMN)pt. cldy.(COLUMN)84(COLUMN)69 St. Thomas(COLUMN)pt. cldy.(COLUMN)82(COLUMN)75 Toronto(COLUMN)cloudy(COLUMN)46(COLUMN)27 Vancouver(COLUMN)clear(COLUMN)52(COLUMN)36 Veracruz(COLUMN)pt. cldy.(COLUMN)86(COLUMN)68 Winnipeg(COLUMN)pt. cldy.(COLUMN)39(COLUMN)36(END TABLE)