Washington: Today - Partly cloudy, high near 40, low near 30. The chance of precipitation is 10 per cent today and 50 per cent tonight. Friday - Rain, high near 40.

Maryland and Virginia: Today - Partly cloudy, highs in the 40s, lows from the 20s to the 30s. Friday - Rain or snow, highs in the 40s.

Lower Potomac and Chesapeake Bay: Today - Partly cloudy, chance of snow tonight. Winds will be from the west at 10 mph today, shifting to from the northwest at 8 to 15 knots later in the day. Winds will then became variable at 10 knots tonight. Waves in unportected waters will average near 20 feet. Visibility will be more than 5 miles.

West Virginia: Today - Cloudy, chance of snow tonight, highs from the low to mid 30s, low teens to the mid 20s. Friday - Snow, highs from the low to mid 30s.

Extended Are Forecast for Saturday through Monday: Partly cloudy through the period, except for a chance of precipitation on Sunday. Highs will be from the 30s to the low 40s, lows from the teens to the 20s.Normal Washington temperatures for the period are a high of 43 and a low of 28.

The National Weather Forecast for today - Some showers are expected across southern California as well as in western and southern Arizona. Snow should fall from New England into the western Great Lakes and southward into the middle and upper Ohio Valleys. It will rain from the Appalachians into the southern and central plains and from eastern Texas across the Tenneessee Valley and to West Virginia and the lower lakes. Temperatures will be very cold in the central and southern high plains and eastward through Kansas, northeastern Texas and southereastern Kansas. The remainder of the nation will be cold, while skles will be sunny in most areas except for the northern Rockies and the central Pacific Coast.

Almanac data for today - Sun rises 7:27 a.m., sets 5:01 p.m.; moon rises 6:35 p.m., sets 7:52 a.m. Tides: High 8:28 a.m. and 8:47 p.m., low 3:07 a.m. and 3:12 p.m. High and low tides at the following points can be obtained by subtracting the hours indicated from the tides above.Annapolis (3 1/4); Bloody Point Lighthouse (4 1/2); Deale, Md. (4 1/2); Colonial Beach (6); Norfolk (1 1/2); Virginia Beach (1); Soloman's Island (6 1/2); 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 becomes hazardous and persons with lung, heart and eye problems should restrict their activity. The forecast for today indicates the air quality will be good.

The National Weather Service forecasts that the Potomac River stgae at Little Falls will be near 3.4 feet. Local Temp., Humidity(TABLE) Time(COLUMN)T.(COLUMN)H. 12 midn.(COLUMN)31(COLUMN)69 1 a.m.(COLUMN)30(COLUMN)72 2 a.m.(COLUMN)30(COLUMN)72 3 a.m.(COLUMN)29(COLUMN)72 4 a.m.(COLUMN)28(COLUMN)72 5 a.m.(COLUMN)27(COLUMN)78 6 a.m.(COLUMN)27(COLUMN)75 7 a.m.(COLUMN)28(COLUMN)72 8 a.m.(COLUMN)29(COLUMN)69 9 a.m.(COLUMN)29(COLUMN)69 10 a.m.(COLUMN)27(COLUMN)81 11 a.m.(COLUMN)28(COLUMN)85 12 noon(COLUMN)29(COLUMN)85 1 p.m.(COLUMN)30(COLUMN)82 2 p.m.(COLUMN)29(COLUMN)85 3 p.m.(COLUMN)30(COLUMN)82 4 p.m.(COLUMN)30(COLUMN)82 5 p.m.(COLUMN)30(COLUMN)82 6 p.m.(COLUMN)30(COLUMN)85 7 p.m.(COLUMN)30(COLUMN)82(END TABLE) Temperatures ending 8 a.m. (EDT) yesterday:(TABLE) City(COLUMN)H.(COLUMN)L. Albany(COLUMN)40(COLUMN)11 Albuquerque(COLUMN)41(COLUMN)29 Amarillo(COLUMN)53(COLUMN)21 Anchorage(COLUMN)44(COLUMN)41 Asheville(COLUMN)43(COLUMN)37 Atlanta City(COLUMN)41(COLUMN)40 Altantic City(COLUMN)34(COLUMN)23 Austin(COLUMN)66(COLUMN)40 Baltimore(COLUMN)42(COLUMN)21 Billings(COLUMN)10(COLUMN)11 Birmingham(COLUMN)45(COLUMN)42 Bismarck(COLUMN)4(COLUMN)-1 Boise(COLUMN)30(COLUMN)16 Boston(COLUMN)36(COLUMN)22 Biston(COLUMN)36(COLUMN)22 Brownsville(COLUMN)76(COLUMN)57 Buffalo(COLUMN)27(COLUMN)07 Burlington(COLUMN)29(COLUMN)23 Casper(COLUMN)26(COLUMN)-17 Charlton, S.C.(COLUMN)54(COLUMN)45 Charlton, W.Va.(COLUMN)32(COLUMN)30 Charlotte(COLUMN)39(COLUMN)36 Cheyenne(COLUMN)32(COLUMN)4 Chicago(COLUMN)27(COLUMN)24 Cincinnati(COLUMN)31(COLUMN)29 Cleveland(COLUMN)28(COLUMN)12 Columbia, S.C.(COLUMN)45(COLUMN)40 Columbus(COLUMN)29(COLUMN)26 Dal.Ft. Worth(COLUMN)67(COLUMN)30 Dayton(COLUMN)30(COLUMN)26 Denver(COLUMN)29(COLUMN)14 Des Moines(COLUMN)20(COLUMN)03 Detroit(COLUMN)29(COLUMN)12 Duluth(COLUMN)20(COLUMN)-8 El Paso(COLUMN)61(COLUMN)37 Fairgo(COLUMN)-1(COLUMN)-10 Flagstaff(COLUMN)36(COLUMN)21 Great Falls(COLUMN)8(COLUMN)-13 Hartford(COLUMN)36(COLUMN)10 Helena(COLUMN)15(COLUMN)-18 Honolulu(COLUMN)82(COLUMN)66 Houston(COLUMN)56(COLUMN)46 Indianapolis(COLUMN)31(COLUMN)26 Jackson, Miss(COLUMN)49(COLUMN)47 Jacksonville(COLUMN)50(COLUMN)46 Juneau(COLUMN)34(COLUMN)34 Kansas City(COLUMN)30(COLUMN)17 Las Vegas(COLUMN)53(COLUMN)32 Little Rock(COLUMN)40(COLUMN)32 Los Angeles(COLUMN)60(COLUMN)47 Louisville(COLUMN)35(COLUMN)34 Memphis(COLUMN)44(COLUMN)38 Midland-Odessa(COLUMN)65(COLUMN)33 Milwaukee(COLUMN)24(COLUMN)20 Mpls.-St. Paul(COLUMN)13(COLUMN)-7 Nashville(COLUMN)38(COLUMN)36 New Orleans(COLUMN)57(COLUMN)48 New York(COLUMN)37(COLUMN)23 Norfolk(COLUMN)36(COLUMN)32 North Platte(COLUMN)22(COLUMN)-4 Oklahoma City(COLUMN)53(COLUMN)22 Omaha(COLUMN)26(COLUMN)4 Orlando(COLUMN)59(COLUMN)46 Philadelphia(COLUMN)37(COLUMN)21 Phoenix(COLUMN)59(COLUMN)48 Pittsburgh(COLUMN)28(COLUMN)16 Portland, M.(COLUMN)30(COLUMN)1 Portland, Ore.(COLUMN)36(COLUMN)29 Providence(COLUMN)33(COLUMN)17 Providence(COLUMN)33(COLUMN)17 Raleigh(COLUMN)48(COLUMN)32 Rapid City(COLUMN)13(COLUMN)-2 Reno(COLUMN)37(COLUMN)28 Richmond(COLUMN)40(COLUMN)27 St. Louis(COLUMN)32(COLUMN)27 St. Prbg.-Tampa(COLUMN)56(COLUMN)43 Salt Lake City(COLUMN)34(COLUMN)12 San Antonio(COLUMN)66(COLUMN)40 San Diego(COLUMN)62(COLUMN)53 San Francisco(COLUMN)55(COLUMN)45 San Juan(COLUMN)85(COLUMN)75 St. Ste. Marie(COLUMN)24(COLUMN)3 Seattle(COLUMN)35(COLUMN)31 Shreveport(COLUMN)56(COLUMN)34 Sioux Falls(COLUMN)14(COLUMN)2 Spokane(COLUMN)23(COLUMN)5 Syracuse(COLUMN)30(COLUMN)22 Tucson(COLUMN)56(COLUMN)49 Tulsa(COLUMN)54(COLUMN)25 Washington(COLUMN)44(COLUMN)27 Wichita(COLUMN)33(COLUMN)19(END TABLE) Temperatures Abroad Yesterday(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)Temp. Aberdeen(COLUMN)pt.cldy(COLUMN)1 p.m.(COLUMN)43 Amsterdam(COLUMN)fog(COLUMN)1 p.m.(COLUMN)30 Ankara(COLUMN)pt.cldy(COLUMN)3 p.m.(COLUMN)28 Athens(COLUMN)cloudy(COLUMN)2 p.m.(COLUMN)45 Auckland(COLUMN)clear(COLUMN)midnight(COLUMN)64 Berlin(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)34 Birmingham(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)45 Brussels(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)32 Cairo(COLUMN)pt. cldy(COLUMN)2 p.m.(COLUMN)59 Casablanca(COLUMN)clear(COLUMN)noon(COLUMN)61 Copenhagen(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)28 Dublin(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)52 Geneva(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)36 Hong Kong(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)52 Lisbon(COLUMN)clear(COLUMN)noon(COLUMN)46 London(COLUMN)rain(COLUMN)1 p.m.(COLUMN)43 Madrid(COLUMN)clear(COLUMN)1 p.m.(COLUMN)41 Malta(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)61 Manila(COLUMN)rain(COLUMN)8 p.m.(COLUMN)77 Moscow(COLUMN)cloudy(COLUMN)3 p.m.(COLUMN)12 New Delhi(COLUMN)clear(COLUMN)5 p.m.(COLUMN)73 Nice(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)48 Oslo(COLUMN)rain(COLUMN)1 p.m.(COLUMN)39 Paris(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)34 Peking(COLUMN)clear(COLUMN)8 p.m.(COLUMN)19 Rome(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)57 Saigon(COLUMN)pt. cldy(COLUMN)8 p.m.(COLUMN)81 Sofia(COLUMN)clear(COLUMN)2 p.m.(COLUMN)34 Stockholm(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)34 Sydney(COLUMN)cloudy(COLUMN)10 p.m.(COLUMN)64 Tel Aviv(COLUMN)pt. cldy(COLUMN)2 p.m.(COLUMN)50 Tokyo(COLUMN)clear(COLUMN)9 p.m.(COLUMN)36 Tunis(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)63 Vienna(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)30 Warsaw(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)27(END TABLE) Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)clear(COLUMN)89(COLUMN)70 Barbados(COLUMN)clear(COLUMN)82(COLUMN)77 Bemuda(COLUMN)cloudy(COLUMN)69(COLUMN)64 Bogota(COLUMN)clear(COLUMN)69(COLUMN)41 Calgary(COLUMN)pt.cldy(COLUMN)14(COLUMN)-8 Culiacan(COLUMN)clear(COLUMN)84(COLUMN)57 Edmonton(COLUMN)cloudy(COLUMN)1(COLUMN)-17 Havana(COLUMN)pt.cldy(COLUMN)75(COLUMN)66 Kingston(COLUMN)pt.cldy(COLUMN)86(COLUMN)75 Montego Bay(COLUMN)clear(COLUMN)86(COLUMN)73 Mexico City(COLUMN)clear(COLUMN)78(COLUMN)41 Monterrey(COLUMN)rain(COLUMN)67(COLUMN)42 Montreal(COLUMN)snow(COLUMN)28(COLUMN)16 Nassau(COLUMN)clear(COLUMN)77(COLUMN)55 Ottawa(COLUMN)pt.cldy(COLUMN)27(COLUMN)16 St. Kitts(COLUMN)clear(COLUMN)83(COLUMN)70 St. Thomas(COLUMN)pt.cldy(COLUMN)85(COLUMN)70 Toronto(COLUMN)cloudy(COLUMN)28(COLUMN)12 Vancouver(COLUMN)pt.cldy(COLUMN)34(COLUMN)21 Veracruz(COLUMN)haze(COLUMN)82(COLUMN)64 Winnipeg(COLUMN)pt.cldy(COLUMN)0(COLUMN)-17(END TABLE)