Washington: Today - Mostly sunny and warmer, high in the 50s, low near 35. Chance of precipitation near zero today, increasing to 40 percent tonight. Winds will be light and variable. Sunday - Cloudy, chance of rain, high near 50.

Maryland: Today - Mostly sunny and warmer, high near 50, low in the 30s. Sunday - Cloudy with a chance of rain, high in the 40s. Virginia: Today - Mostly sunny and warmer, high in the 50s, low in the 30s. Sunday - Cloudy with a chance of rain, high in the 40s. West Virginia: Today - Mostly sunny, with increasing cloudiness later in the day, highs will be in the 50s, lows in the mid 30s to near 40. Sunday - Rain likely, highs from the mid 40s to low 50s.

Lower Potomac and Chesapeake Bay - Fair with winds shifting to the south at 5 to 15 knots. Visibility will be 3 to 5 miles in haze. Waves will average near 1 foot.

Extended Area Forecast for Monday through Wednesday - Chance of showers Monday anl Tuesday followed by clearing late Tuesday and Wednesday. High temperatures will average in the mid 40s to near 60, lows will be in the 30s and low 40s. Normal Washington temperatures for the period are a high of 54 and a low of 34.

TR for Add 2

The National Weather Forecast for Today - Temperatures will be generally cool or cold across the nation. Snow flurries will extend from the lower Great Lakes into northern New England. Rainshowers will be scattered from Colorado and Utah into Arizona, and from the northern half of the Pacific Coast into western Montana

Almanac Data for today: Sunrises 6:26 a.m., sets 6:11 p.m! Moonrises 7:51 a.m., sets 6:11 p.m. Moon rises 7:51 a.m., sets 9:07 p.m. Tides: high 9:46 a.m. and 10:08 p.m., low 4:03 a.m. and 4:30 p.m. High and low tides at the following locations may be obtained by subtracting the hours indicated from the hours above: Annapolis (11/2); Bloody Point Lighthouse (41/2); Deale, Md., (41/2); Colonial Beach (6); Norfolk (11/2); Virginia Beach (1); Solomons Island (61/2); Point Lookout (7).

The Council of Governments' Air Quality Index for yesterday showed the high reading in the Washington area during the 3 p.m. period was 19 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 ailmants are urged to restrict their activity. The forecast for today indicates tahthat the air quality will remain about the same.

The National Weather Service forecasts the Potomac River stage at Little Falls should rise to near 3.7 feet today. (TABLE) Time,(COLUMN)T.(COLUMN)H. 12 night(COLUMN)38(COLUMN)73 1 a.m.(COLUMN)38(COLUMN)73 2 a.m.(COLUMN)37(COLUMN)79 3 a.m.(COLUMN)37(COLUMN)76 4 a.m.(COLUMN)36(COLUMN)76 5 a.m.(COLUMN)37(COLUMN)73 6 a.m.(COLUMN)37(COLUMN)76 7 a.m.(COLUMN)37(COLUMN)76 8 a.m.(COLUMN)37(COLUMN)79 9 a.m.(COLUMN)37(COLUMN)82 10 a.m.(COLUMN)38(COLUMN)82 11 a.m.(COLUMN)39(COLUMN)82 12 noon(COLUMN)41(COLUMN)82 1 p.m.(COLUMN)42(COLUMN)82 2 p.m.(COLUMN)43(COLUMN)79 3 p.m.(COLUMN)43(COLUMN)76 4 p.m.(COLUMN)42(COLUMN)79 5 p.m.(COLUMN)44(COLUMN)71 6 p.m.(COLUMN)44(COLUMN)65 7 p.m.(COLUMN)44(COLUMN)60(END TABLE) Temperatures ending 7 a.m. (EST) yesterday:(TABLE) City(COLUMN)H.(COLUMN)L. Albany(COLUMN)43(COLUMN)16 Albuquerque(COLUMN)69(COLUMN)37 Amarillo(COLUMN)69(COLUMN)34 Anchorage(COLUMN)37(COLUMN)33 Asheville(COLUMN)46(COLUMN)39 Atlanta(COLUMN)40(COLUMN)37 Atlantic City(COLUMN)38(COLUMN)34 Austin(COLUMN)64(COLUMN)37 Baltimore(COLUMN)38(COLUMN)34 Billings(COLUMN)44(COLUMN)32 Birmingham(COLUMN)51(COLUMN)34 Bismarck(COLUMN)43(COLUMN)33 Boise(COLUMN)54(COLUMN)33 Boaston(COLUMN)37(COLUMN)29 Brownsville(COLUMN)71(COLUMN)48 Buffalo(COLUMN)34(COLUMN)20 Burlington, Vt.(COLUMN)39(COLUMN)31 Casper(COLUMN)54(COLUMN)32 Charleston, S.C.(COLUMN)47(COLUMN)44 Charleston, WVa.(COLUMN)52(COLUMN)36 Charlotte(COLUMN)39(COLUMN)36 Cheyenne(COLUMN)58(COLUMN)34 Chicago(COLUMN)38(COLUMN)20 Cincinnati(COLUMN)38(COLUMN)29 Cleveland(COLUMN)43(COLUMN)14 Columbia, S.C.(COLUMN)40(COLUMN)38 Columbus(COLUMN)51(COLUMN)20 Dal-FT Worth(COLUMN)57(COLUMN)36 Dayton(COLUMN)40(COLUMN)18 Denver(COLUMN)66(COLUMN)37 Des Moines(COLUMN)38(COLUMN)20 Detroit(COLUMN)37(COLUMN)16 Duluth(COLUMN)45(COLUMN)29 El Paso(COLUMN)77(COLUMN)47 Fairbanks(COLUMN)34(COLUMN)00 Fargo(COLUMN)40(COLUMN)27 Flagstaff(COLUMN)56(COLUMN)28 Great Falls(COLUMN)42(COLUMN)29 Hartford(COLUMN)44(COLUMN)18 Helena(COLUMN)47(COLUMN)28 Honolulu(COLUMN)86(COLUMN)73 Houston(COLUMN)57(COLUMN)43 Indianapolls(COLUMN)41(COLUMN)22 Jackson(COLUMN)39(COLUMN)35 Jacksonville(COLUMN)63(COLUMN)47 Juneau(COLUMN)40(COLUMN)34 Kansas City(COLUMN)41(COLUMN)30 Las Vegas(COLUMN)70(COLUMN)49 Little Rock(COLUMN)42(COLUMN)33 Los Angeles(COLUMN)64(COLUMN)50 Louisville(COLUMN)41(COLUMN)63 Memphis(COLUMN)39(COLUMN)36 Miami Beach(COLUMN)73(COLUMN)58 Midland(COLUMN)76(COLUMN)44 Milwaukee(COLUMN)35(COLUMN)26 Mpls.-St. Paul(COLUMN)39(COLUMN)19 Nashville(COLUMN)40(COLUMN)36 New Orleans(COLUMN)50(COLUMN)43 New York(COLUMN)41(COLUMN)36 Norfolk(COLUMN)35(COLUMN)34 North Platte(COLUMN)40(COLUMN)26 Oklahoma Cty(COLUMN)55(COLUMN)32 Omaha(COLUMN)40(COLUMN)26 Orlando(COLUMN)71(COLUMN)53 Philedelphia(COLUMN)38(COLUMN)34 Phoenix(COLUMN)78(COLUMN)57 Pittsburgh(COLUMN)44(COLUMN)32 Portland, Me.(COLUMN)38(COLUMN)23 Portland Or.(COLUMN)57(COLUMN)34 Providence(COLUMN)37(COLUMN)24 Raleigh(COLUMN)36(COLUMN)34 Rapid City(COLUMN)47(COLUMN)33 Reno(COLUMN)47(COLUMN)40 Richmond(COLUMN)33(COLUMN)33 St. Louis(COLUMN)38(COLUMN)19 St. Prbg.-Tampa(COLUMN)66(COLUMN)54 Salt Lake City(COLUMN)58(COLUMN)41 San Antonio(COLUMN)70(COLUMN)36 San Diego(COLUMN)66(COLUMN)55 San Francisco(COLUMN)61(COLUMN)53 San Juan(COLUMN)84(COLUMN)72 St. Ste. Marie(COLUMN)36(COLUMN)30 Seattle(COLUMN)54(COLUMN)39 Shreveport(COLUMN)42(COLUMN)25 Sioux Falls(COLUMN)38(COLUMN)28 Spokane(COLUMN)46(COLUMN)30 Syracuse(COLUMN)41(COLUMN)07 Topeka(COLUMN)47(COLUMN)26 Tucson(COLUMN)77(COLUMN)50 Tulsa(COLUMN)53(COLUMN)28 Washington(COLUMN)38(COLUMN)36 Wichita(COLUMN)51(COLUMN)29(END TABLE) Temperatures Abroad Yesterday(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)Temp Aberdeen(COLUMN)pt. cldy(COLUMN)1p.m.(COLUMN)52 Amsterdam(COLUMN)cloudy(COLUMN)1p.m.(COLUMN)48 Ankara(COLUMN)pt. cldy(COLUMN)3p.m.(COLUMN)48 Athens(COLUMN)pt. cldy(COLUMN)2p.m.(COLUMN)57 Auckland(COLUMN)clear(COLUMN)midnight(COLUMN)66 Berlin(COLUMN)clear(COLUMN)1p.m.(COLUMN)50 Briming'm(COLUMN)pt. cldy(COLUMN)1p.m.(COLUMN)57 Brussels(COLUMN)cloudy(COLUMN)1p.m. Cascblanca(COLUMN)clear(COLUMN)noon(COLUMN)68 Copenhagen(COLUMN)cloudy(COLUMN)1p.m.(COLUMN)36 Dublin(COLUMN)pt. cldy(COLUMN)1p.m.(COLUMN)57 Geneva(COLUMN)pt. cldy(COLUMN)1p.m.(COLUMN)50 Hong Kong(COLUMN)cloudy(COLUMN)1p.m.(COLUMN)64 Lisbon(COLUMN)dust(COLUMN)noon(COLUMN)66 London(COLUMN)cloudy(COLUMN)1p.m.(COLUMN)55 Madrid(COLUMN)clear(COLUMN)1p.m.(COLUMN)64 Malta(COLUMN)pt.cldy(COLUMN)1p.m.(COLUMN)57 Manila(COLUMN)clear(COLUMN)8p.m.(COLUMN)82 Moscow(COLUMN)snow(COLUMN)3p.m.(COLUMN)30 New Delhi(COLUMN)clear(COLUMN)5p.m.(COLUMN)77 Nice(COLUMN)clear(COLUMN)1p.m.(COLUMN)64 Oslo(COLUMN)cloudy(COLUMN)1p.m.(COLUMN)28 Paris(COLUMN)cloudy(COLUMN)1p.m.(COLUMN)54 Peking(COLUMN)clear(COLUMN)8p.m.(COLUMN)30 Rome(COLUMN)clear(COLUMN)1p.m.(COLUMN)61 Saigon(COLUMN)clear(COLUMN)8p.m.(COLUMN)82 Sofia(COLUMN)rain(COLUMN)2p.m.(COLUMN)39 Stockholm(COLUMN)clear(COLUMN)1p.m.(COLUMN)39 Sydney(COLUMN)clear(COLUMN)10p.m.(COLUMN)75 Tel Aviv(COLUMN)cloudy(COLUMN)2p.m.(COLUMN)79 Tokyo(COLUMN)rain(COLUMN)9p.m.(COLUMN)46 Tunis(COLUMN)clear(COLUMN)1p.m.(COLUMN)64 Vienna(COLUMN)clear(COLUMN)1p.m.(COLUMN)45 Warsaw(COLUMN)cloudy(COLUMN)1p.m.(COLUMN)37(END TABLE) Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)clear(COLUMN)91(COLUMN)71 Barbados(COLUMN)cloudy(COLUMN)84(COLUMN)77 Bermuda(COLUMN)cloudy(COLUMN)70(COLUMN)61 Bogota(COLUMN)cloudy(COLUMN)66(COLUMN)45 Calgary(COLUMN)clear(COLUMN)43(COLUMN)23 Culiacan(COLUMN)fair(COLUMN)90(COLUMN)50 Edmonton(COLUMN)clear(COLUMN)43(COLUMN)21 Havana(COLUMN)pt. cldy(COLUMN)77(COLUMN)70 Kingston(COLUMN)clear(COLUMN)86(COLUMN)73 Monitego Bay(COLUMN)fair(COLUMN)82(COLUMN)72 Mexico City(COLUMN)haze(COLUMN)72(COLUMN)43 Monterry(COLUMN)fair(COLUMN)84(COLUMN)45 Montreal(COLUMN)cloudy(COLUMN)34(COLUMN)27 Nassau(COLUMN)clear(COLUMN)82(COLUMN)68 Ottawa(COLUMN)cloudy(COLUMN)34(COLUMN)27 Regina(COLUMN)clear(COLUMN)39(COLUMN)23 St. Kitts(COLUMN)clear(COLUMN)83(COLUMN)72 St. Thomas(COLUMN)cloudy(COLUMN)83(COLUMN)73 Toronto(COLUMN)clear(COLUMN)36(COLUMN)14 Vancouver(COLUMN)fog(COLUMN)50(COLUMN)34 Veracruz(COLUMN)clear(COLUMN)75(COLUMN)59 Winnipeg(COLUMN)clear(COLUMN)34(COLUMN) 5(END TABLE)