Washington: Today - Partly cloudy, rain likely late in the day, high in the upper 50s, low in the low 40s. The chance of rain is 40 per cent today and 89 per cent tonight. Sunday - Rain, high in the upper 50s.

Maryland and Virginia: Today - Partly cloud, rain likely late in the day, highs from the low 50s to the 60s, lows in the 40s. Sunday - Rain, highs in from the 50s to the low 60s.

Lower Potomac and Chesapeake Bay: Today - Fair with a rain likely late in the day.Visibility will be more than 5 miles, but less than 2 miles in rain. Wind will be from the southeast from 8 to 20 knots. Waves in unprotected waters will be less than 2 feet.

West Virginia: Today - Rain, highs in the 50s, lows from the upper 30s to the mid 40s. Sunday - Rain, highs from the 50s to the low 60s.

Extended Area Forecast for Monday through Wednesday: Cloudy through the period with a chance of precipitation on each day. Highs will be in the 50s, lows from the 30s to the low 40s. Normal Washington temperatures for the period are high of 44 and a low of 28.

The National Weather Forecast for today - snow will fall over the northern Plains and the upper Mississippi Valley. Rain will fall across the Great Lakes. Thunderstorms will hit the central Plains, the remainder of the Mississippi and the Ohio valleys, eastward across the middle and southern Atlantic Coast. Rain will also dampen the Pacific Northwest southward through central California. Rain will mix with snow over Idaho, northern Nevada and western Montana. Elsewhere, fair or partly cloudy skies will prevail. Cool or cold temperatures will extend from the Rockies to the Pacific Coast. The rest of the nation will be mild.

Alamanac Data for today - Sun Rises 7:20 a.m., sets 4:48 p.m.; moon rises 11:43 a.m., set 11:49 p.m. Tides: high 12:07 a.m. and 12:41 p.m., low 7:00 a.m. and 7:27 p.m. High and low tides at the following locations may be obtained by subtracting the hours indicated from the tides above. Annapolis (1 1/2), Bloody Point Lighthouse (4 1/2), Deale, Md. (4 1/2), Colonial Beach (1), Solomons Island (6 1/2), Beach (6), Norfolk (1 1/2), Virginia Point Lookout (7).

The Council of 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 14 for the pollutant, sulfur dioxide. Index values between zero 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 be goo.

The National Weather Service forecasts the Potomac River stage at Little Falls should be near 4.2 feet today. Local Temp. Humidity(TABLE) Time(COLUMN)T.(COLUMN)H. 12 midn.(COLUMN)37(COLUMN)89 1 a.m.(COLUMN)37(COLUMN)83 2 a.m.(COLUMN)37(COLUMN)85 3 a.m.(COLUMN)37(COLUMN)89 4 a.m.(COLUMN)36(COLUMN)89 5 a.m.(COLUMN)35(COLUMN)89 6 a.m.(COLUMN)35(COLUMN)89 7 a.m.(COLUMN)35(COLUMN)89 8 a.m.(COLUMN)36(COLUMN)89 9 a.m.(COLUMN)37(COLUMN)89 10 a.m.(COLUMN)41(COLUMN)79 11 a.m.(COLUMN)46(COLUMN)63 12 noon(COLUMN)47(COLUMN)61 1 p.m.(COLUMN)50(COLUMN)54 2 p.m.(COLUMN)51(COLUMN)54 3 p.m.(COLUMN)51(COLUMN)56 4 p.m.(COLUMN)50(COLUMN)59 5 p.m.(COLUMN)48(COLUMN)58 6 p.m.(COLUMN)46(COLUMN)65 7 p.m.(COLUMN)42(COLUMN)76(END TABLE) Temperatures ending 8 a.m. (EST) yesterday:(TABLE) City(COLUMN)H.(COLUMN)L. Albany(COLUMN)40(COLUMN)27 Albuquerque(COLUMN)62(COLUMN)40 Amarillo(COLUMN)71(COLUMN)49 Anchorage(COLUMN)20(COLUMN)16 Asheville(COLUMN)62(COLUMN)30 Atlanta(COLUMN)65(COLUMN)40 Atlantic City(COLUMN)54(COLUMN)32 Austin(COLUMN)73(COLUMN)52 Baltimore(COLUMN)57(COLUMN)29 Billings(COLUMN)43(COLUMN)36 Birmingham(COLUMN)63(COLUMN)38 Bismarck(COLUMN)32(COLUMN)25 Boise(COLUMN)52(COLUMN)35 Boston(COLUMN)50(COLUMN)35 Brownsville(COLUMN)80(COLUMN)63 Buffalo(COLUMN)37(COLUMN)30 Burlington(COLUMN)30(COLUMN)26 Casper(COLUMN)50(COLUMN)28 Charleston,S.C.(COLUMN)61(COLUMN)52 Charleston,WVa(COLUMN)49(COLUMN)31 Charlotte(COLUMN)65(COLUMN)40 Cheyenne(COLUMN)50(COLUMN)31 Chicago(COLUMN)37(COLUMN)31 Cincinnati(COLUMN)42(COLUMN)33 Cleveland(COLUMN)38(COLUMN)33 Columbus, S.C.(COLUMN)62(COLUMN)44 Columbus(COLUMN)38(COLUMN)33 Dal.-Ft. Worth(COLUMN)72(COLUMN)53 Dayton(COLUMN)42(COLUMN)33 Denver(COLUMN)64(COLUMN)34 Des Moines(COLUMN)53(COLUMN)40 Detroit(COLUMN)35(COLUMN)29 Duluth(COLUMN)29(COLUMN)29 El Paso(COLUMN)72(COLUMN)56 Fairbanks(COLUMN)-30(COLUMN)-42 Fargo(COLUMN)31(COLUMN)30 Flagstaff(COLUMN)53(COLUMN)27 Great Falls(COLUMN)47(COLUMN)32 Hartford(COLUMN)44(COLUMN)22 Helena(COLUMN)44(COLUMN)33 Honolulu(COLUMN)86(COLUMN)70 Houston(COLUMN)67(COLUMN)57 Indianapolis(COLUMN)42(COLUMN)33 Jackson, Miss.(COLUMN)65(COLUMN)44 Jacksonville(COLUMN)66(COLUMN)60 Juneau(COLUMN)34(COLUMN)31 Kansas City(COLUMN)63(COLUMN)47 Las Vegas(COLUMN)75(COLUMN)48 Little Rock(COLUMN)56(COLUMN)43 Los Angeles(COLUMN)65(COLUMN)51 Louisville(COLUMN)45(COLUMN)32 Memphis(COLUMN)61(COLUMN)44 Miami Beach(COLUMN)84(COLUMN)76 Midland(COLUMN)76(COLUMN)52 Milwaukee(COLUMN)34(COLUMN)23 Mpls-St. Paul(COLUMN)36(COLUMN)34 Nashville(COLUMN)53(COLUMN)34 New Orleans(COLUMN)71(COLUMN)54 New York(COLUMN)55(COLUMN)38 Norfolk(COLUMN)61(COLUMN)37 North Platte(COLUMN)65(COLUMN)34 Oklahoma City(COLUMN)70(COLUMN)52 Omaha(COLUMN)56(COLUMN)41 Orlando(COLUMN)74(COLUMN)68 Philadelphia(COLUMN)50(COLUMN)27 Phoenix(COLUMN)76(COLUMN)54 Pittsburgh(COLUMN)41(COLUMN)32 Portland, Maine(COLUMN)41(COLUMN)19 Portland, Ore.(COLUMN)51(COLUMN)40 Providence(COLUMN)53(COLUMN)27 Raleigh(COLUMN)62(COLUMN)32 Rapid City(COLUMN)52(COLUMN)38 Reno(COLUMN)53(COLUMN)26 Richmond(COLUMN)65(COLUMN)30 St. Louis(COLUMN)60(COLUMN)36 St.Petersburg-Tampa(COLUMN)70(COLUMN)68 Salt Lake City(COLUMN)59(COLUMN)33 San Antonio(COLUMN)73(COLUMN)54 San Diego(COLUMN)69(COLUMN)61 San Francisco(COLUMN)57(COLUMN)50 San Juan(COLUMN)83(COLUMN)72 St.Ste. Marie(COLUMN)35(COLUMN)34 Seattle(COLUMN)49(COLUMN)39 Shreveport(COLUMN)66(COLUMN)41 Sioux Falls(COLUMN)47(COLUMN)36 Spokane(COLUMN)43(COLUMN)34 Syracuse(COLUMN)37(COLUMN)33 Topeka(COLUMN)63(COLUMN)48 Tucson(COLUMN)77(COLUMN)54 Tulsa(COLUMN)69(COLUMN)50 Washington(COLUMN)57(COLUMN)34 Wichita(COLUMN)64(COLUMN)49(END TABLE) Temperatures Abroad Yesterday(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)Temp. Aberdeen(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)46 Amsterdam(COLUMN)pt.cldy(COLUMN)1 p.m.(COLUMN)46 Ankara(COLUMN)snow(COLUMN)3 p.m.(COLUMN)34 Athens(COLUMN)pt.cldy(COLUMN)2 p.m.(COLUMN)46 Auckland(COLUMN)pt.cldy(COLUMN)midnight(COLUMN)61 Berlin(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)41 Birmingham(COLUMN)rain(COLUMN)1 p.m.(COLUMN)43 Brussels(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)45 Casablanca(COLUMN)cloudy(COLUMN)noon(COLUMN)61 Copenhagen(COLUMN)clear(COLUMN)1 p.m.(COLUMN)39 Dublin(COLUMN)pt.cldy(COLUMN)1 p.m.(COLUMN)48 Geneva(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)37 Hong Kong(COLUMN)clear(COLUMN)8 p.m.(COLUMN)70 Lisbon(COLUMN)rain(COLUMN)noon(COLUMN)48 London(COLUMN)rain(COLUMN)1 p.m.(COLUMN)46 Madrid(COLUMN)pt.cldy(COLUMN)1 p.m.(COLUMN)57 Malta(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)52 Manila(COLUMN)clear(COLUMN)8 p.m.(COLUMN)79 Moscow(COLUMN)snow(COLUMN)3 p.m.(COLUMN)25 New Delhi(COLUMN)clear(COLUMN)5 p.m.(COLUMN)70 Nice(COLUMN)clear(COLUMN)1 p.m.(COLUMN)57 Oslo(COLUMN)pt.cldy(COLUMN)1 p.m.(COLUMN)27 Paris(COLUMN)clear(COLUMN)1 p.m.(COLUMN)43 Peking(COLUMN)clear(COLUMN)8 p.m.(COLUMN)32 Rome(COLUMN)clear(COLUMN)1 p.m.(COLUMN)57 Saigon(COLUMN)clear(COLUMN)8 p.m.(COLUMN)86 Sofia(COLUMN)cloudy(COLUMN)2 p.m.(COLUMN)25 Stockholm(COLUMN)pt.cldy(COLUMN)1 p.m.(COLUMN)39 Sydney(COLUMN)pt.cldy(COLUMN)10 p.m.(COLUMN)70 Tel Aviv(COLUMN)rain(COLUMN)2 p.m.(COLUMN)57 Tokyo(COLUMN)cloudy(COLUMN)9 p.m.(COLUMN)50 Tunis(COLUMN)rain(COLUMN)1 p.m.(COLUMN)55 Vienna(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)43 Warsaw(COLUMN)clear(COLUMN)1 p.m.(COLUMN)36(END TABLE) Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)fair(COLUMN)86(COLUMN)71 Barbados(COLUMN)pt.cldy(COLUMN)82(COLUMN)77 Bermuda(COLUMN)rain(COLUMN)73(COLUMN)68 Calgary(COLUMN)fog(COLUMN)32(COLUMN)21 Edmonton(COLUMN)snow(COLUMN)18(COLUMN)14 Havana(COLUMN)fair(COLUMN)88(COLUMN)71 Kingston(COLUMN)fair(COLUMN)88(COLUMN)74 Montego Bay(COLUMN)cloudy(COLUMN)86(COLUMN)72 Mexico City(COLUMN)cloudy(COLUMN)64(COLUMN)52 Monterrey(COLUMN)clear(COLUMN)77(COLUMN)47 Montreal(COLUMN)snow(COLUMN)28(COLUMN)23 Nassau(COLUMN)cloudy(COLUMN)82(COLUMN)72 Ottawa(COLUMN)cloudy(COLUMN)28(COLUMN)27 Regina(COLUMN)snow(COLUMN)28(COLUMN)23 St. Kitts(COLUMN)pt.cldy(COLUMN)84(COLUMN)75 St. Thomas(COLUMN)rain(COLUMN)84(COLUMN)75 Toronto(COLUMN)cloudy(COLUMN)37(COLUMN)32 Vancouver(COLUMN)clear(COLUMN)48(COLUMN)34 Veracruz(COLUMN)cloudy(COLUMN)79(COLUMN)66(END TABLE)