Washington: Today - Cloudy, chance of snow or rain, high near 30. The chance of precipitation is 40 per cent today, 50 per cent tonight. Friday - Partly cloudy, high near 40.

Maryland and Virginia: Today - Cloudy, chance of rain or snow, highs ranging from the 30s to the low 50s lows from the teens to the mid 30s. Friday - Partly cloudy, highs from the upper 20s to the mid 40s.

Lower Potomac and Chesapeake Bay: Today - Cloudy, chance of rain or snow. Winds will be from the southwest at 10 to 20 knots today, shifting to 15 to 20 knots from the northwest tonight. Visibility will be more than 5 miles. The bay is still ice-covered.

West Virginia: Today - Snow or rain, highs from the upper 20s to the mid 30s, lows from the teens to the mid 20s. Friday - Snow flurries likely, highs from the upper 20s to the mid 30s.

Extended Area Forecast for Saturday through Sudnay: Fair and cold. Highs will average from the upper 20s to the mid 30s, lows from near 10 to the 20s. Normal Washington temperatures for the period are a high of 44 and a low of 28.

The National Weather Forecast for today - Snow will spread from the northern Atlantic Coast through the Ohio Valley, much of the Great Lakes region and in New Mexico. Snow or freezing rain is likely in the central Appalachians. Rain will be extended over the middle and southern Atlantic and the Gulf coasts, the southern Plains and southeastern Missouri. The pacific northwest will be mostly cloudy with some fog. Mostly sunny skies will cover the northern and central Great Plains, the northern and central Rockies, the intermountain region and California. It will be mild in the northern plains and generally cold elsewhere.

Almanac Data for Today - Sun rises 7:13 a.m., sets 5:32 p.m.; moon rises 5:25 p.m., sets 6:28 a.m. Tides: High 7:25 a.m. and 7:43 p.m., low 1:59 a.m. and 2:09 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); Solomon'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 16 for the pollutant, photochemical oxidants. 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 fair.

The National Weather Service forecasts that the Potomac River stage at Little Falls will be near 3.1 feet. Local Temp., Humidity(TABLE) Time(COLUMN)T.(COLUMN)H. 12 mid.(COLUMN)25(COLUMN)57 1 a.m.(COLUMN)25(COLUMN)57 2 a.m.(COLUMN)24(COLUMN)60 3 a.m.(COLUMN)24(COLUMN)60 4 a.m.(COLUMN)24(COLUMN)60 5 a.m.(COLUMN)23(COLUMN)62 6 a.m.(COLUMN)23(COLUMN)62 7 a.m.(COLUMN)24(COLUMN)60 8 a.m.(COLUMN)25(COLUMN)60 9 a.m.(COLUMN)28(COLUMN)53 10 a.m.(COLUMN)31(COLUMN)47 11 a.m.(COLUMN)33(COLUMN)45 12 noon(COLUMN)34(COLUMN)43 1 p.m.(COLUMN)35(COLUMN)44 2 p.m.(COLUMN)36(COLUMN)42 3 p.m.(COLUMN)37(COLUMN)40 4 p.m.(COLUMN)38(COLUMN)40 5 p.m.(COLUMN)36(COLUMN)52 6 p.m.(COLUMN)34(COLUMN)52 7 p.m.(COLUMN)34(COLUMN)49(END TABLE) Temperatures ending 8 a.m. (EST) yesterday:(TABLE) City(COLUMN)H.(COLUMN)L. Albany(COLUMN)24(COLUMN)06 Albuquerque(COLUMN)53(COLUMN)36 Amarillo(COLUMN)59(COLUMN)37 Anchorage(COLUMN)35(COLUMN)33 Asheville(COLUMN)35(COLUMN)17 Atlanta(COLUMN)39(COLUMN)18 Atlantic City(COLUMN)30(COLUMN)22 Austin(COLUMN)49(COLUMN)41 Baltimore(COLUMN)31(COLUMN)20 Billings(COLUMN)45(COLUMN)26 Birmingham(COLUMN)42(COLUMN)19 Bismarck(COLUMN)23(COLUMN)19 Boise(COLUMN)35(COLUMN)16 Boston(COLUMN)29(COLUMN)13 Brownsville(COLUMN)56(COLUMN)53 Buffalo(COLUMN)25(COLUMN)20 Burlington(COLUMN)21(COLUMN) 8 Casper(COLUMN)41(COLUMN)19 Charleston. SC(COLUMN)49(COLUMN)34 Ch'rl'ston, W Va(COLUMN)28(COLUMN)05 Charlotte(COLUMN)43(COLUMN)18 Chevenne(COLUMN)40(COLUMN)21 Chicago(COLUMN)23(COLUMN)06 Cincinnati(COLUMN)24(COLUMN) 4 Cleveland(COLUMN)25(COLUMN)14 Columbia, SC(COLUMN)50(COLUMN)17 Columbus(COLUMN)17(COLUMN) 2 Dal-Ft Worth(COLUMN)46(COLUMN)40 Dayton(COLUMN)19(COLUMN) 2 Denver(COLUMN)46(COLUMN)26 Des Moines(COLUMN)30(COLUMN)09 Detroit(COLUMN)28(COLUMN)13 Duluth(COLUMN)25(COLUMN)12 El Paso(COLUMN)65(COLUMN)37 Fairbanks(COLUMN) 0(COLUMN) 3 Fargo(COLUMN)13(COLUMN)08 Flagstaff(COLUMN)42(COLUMN)16 Great Falls(COLUMN)44(COLUMN)21 Hartford(COLUMN)29(COLUMN)07 Helena(COLUMN)41(COLUMN)18 Honolulu(COLUMN)84(COLUMN)71 Houston(COLUMN)47(COLUMN)40 Indianapolis(COLUMN)20(COLUMN) 4 Jackson Miss(COLUMN)46(COLUMN)24 Jacksonville(COLUMN)50(COLUMN)39 Juneau(COLUMN)44(COLUMN)43 Kansas City(COLUMN)25(COLUMN)15 Las Vegas(COLUMN)65(COLUMN)46 Little Rock(COLUMN)50(COLUMN)27 Los Angeles(COLUMN)63(COLUMN)48 Louisville(COLUMN)31(COLUMN)05 Memphis(COLUMN)49(COLUMN)24 Miami Beach(COLUMN)67(COLUMN)57 Midland-Odessa(COLUMN)65(COLUMN)43 Milwaukee(COLUMN)22(COLUMN)01 Mpls-St Paul(COLUMN)18(COLUMN)03 Hashville(COLUMN)40(COLUMN)12 New Orleans(COLUMN)40(COLUMN)34 New York(COLUMN)28(COLUMN)19 Norfolk(COLUMN)38(COLUMN)26 North Platte(COLUMN)36(COLUMN)09 Oklahoma City(COLUMN)53(COLUMN)39 Omaha(COLUMN)30(COLUMN)10 Orlando(COLUMN)60(COLUMN)40 PHiladelphia(COLUMN)27(COLUMN)17 Phoenix(COLUMN)68(COLUMN)45 Pittsburgh(COLUMN)18(COLUMN)05 Portland, Miss(COLUMN)24(COLUMN)01 Portland, Ore(COLUMN)49(COLUMN)33 Providence(COLUMN)28(COLUMN)10 Raleigh(COLUMN)39(COLUMN)13 Rapid City(COLUMN)34(COLUMN)18 Reno(COLUMN)49(COLUMN)20 Richmond(COLUMN)40(COLUMN)10 St. Louis(COLUMN)29(COLUMN)04 St Prbg-Tampa(COLUMN)59(COLUMN)43 Salt Lake City(COLUMN)31(COLUMN)09 San Antonio(COLUMN)45(COLUMN)42 San Diego(COLUMN)64(COLUMN)56 San Francisco(COLUMN)61(COLUMN)48 San Juan(COLUMN)83(COLUMN)66 St Ste Marie(COLUMN)24(COLUMN)08 Seattle(COLUMN)54(COLUMN)44 Shreveport(COLUMN)50(COLUMN)29 Sioux Falls(COLUMN)27(COLUMN)21 Spokane(COLUMN)27(COLUMN)25 Syracuse(COLUMN)22(COLUMN)11 Tucson(COLUMN)68(COLUMN)50 Tulsa(COLUMN)48(COLUMN)37 Washington(COLUMN)37(COLUMN)22 Witchita(COLUMN)44(COLUMN)28(END TABLE) Temperatures Abroad Yesterday(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)Temp. Aberdee(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)41 Amsterdam(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)32 Ankara(COLUMN)clear(COLUMN)3 p.m.(COLUMN)32 Athens(COLUMN)clear(COLUMN)2 p.m.(COLUMN)64 Auckland(COLUMN)cloudy(COLUMN)midnight(COLUMN)70 Berlin(COLUMN)haze(COLUMN)1 p.m.(COLUMN)27 Birmingham(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)41 Brussels(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)32 Cairo(COLUMN)haze(COLUMN)2 p.m.(COLUMN)81 Casablanca(COLUMN)cloudy(COLUMN)noon(COLUMN)59 Copenhagen(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)32 Dublin(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)45 Geneva(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)34 Hong Kong(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)46 Lisbon(COLUMN)cloudy(COLUMN)noon(COLUMN)59 London(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)39 Madrid(COLUMN)rain(COLUMN)1 p.m.(COLUMN)43 Walta(COLUMN)clear(COLUMN)1 p.m.(COLUMN)57 Manila(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)81 Moscow(COLUMN)cloudy(COLUMN)3 p.m.(COLUMN)30 New Delhi(COLUMN)clear(COLUMN)5 p.m.(COLUMN)68 Nice(COLUMN)clear(COLUMN)1 p.m.(COLUMN)54 Oslo(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)28 Paris(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)32 Peking(COLUMN)clear(COLUMN)8 p.m.(COLUMN)21 Rome(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)54 Saigon(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)81 Sofia(COLUMN)cloudy(COLUMN)2 p.m.(COLUMN)41 Stockholm(COLUMN)snow(COLUMN)1 p.m.(COLUMN)23 Sydney(COLUMN)cloudy(COLUMN)10 p.m.(COLUMN)70 Tel Aviv(COLUMN)cloudy(COLUMN)2 p.m.(COLUMN)77 Tokyo(COLUMN)cloudy(COLUMN)9 p.m.(COLUMN)37 Tunis(COLUMN)rain(COLUMN)1 p.m.(COLUMN)52 Vienna(COLUMN)clear(COLUMN)1 p.m.(COLUMN)32 Warsaw(COLUMN)clear(COLUMN)1 p.m.(COLUMN)27(END TABLE) Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)clear(COLUMN)86(COLUMN)71 Barbados(COLUMN)rain(COLUMN)84(COLUMN)75 Bermuca(COLUMN)cloudy(COLUMN) - (COLUMN)57 Culiacan(COLUMN)clear(COLUMN)82(COLUMN)57 Havana(COLUMN)clear(COLUMN)73(COLUMN)66 Montego Bay(COLUMN)cloudy(COLUMN)86(COLUMN)71 Mexico City(COLUMN)pt. cldy(COLUMN)73(COLUMN)44 Monterrey(COLUMN)cloudy(COLUMN)50(COLUMN)46 St. Kitts(COLUMN)pt. cldy(COLUMN)85(COLUMN)70 St. Thomas(COLUMN)pt. cldy(COLUMN)85(COLUMN)71 Veracruz(COLUMN)cloudy(COLUMN)71(COLUMN)63(END TABLE)