Washington: Today - Snow, high in the mid 30s, low in the mid 20s. The chance of precipitation is near 100 per cent today and 70 per cent tonight. Saturday - Partly cloudy, chance of snow flurries, high in mid 30s.

Maryland and Virginia: Today - Snow, high from the 30s to the mid 40s, lows from the 20s to the mid 30s. Saturday - Partly cloudy, chance of snow flurries, highs from the 20s to the mid 30s.

Lower Potomac and Chesapeake Bay: Today - Snow with visibility of less than 3 miles. Wind will be from the east or northeast at less than 20 knots today, shifting to the north at more than 20 knots tonight. Waves in unprotected waters will be up to 2 feet.

Extended Area Forecast for Sunday through Tuesday: Fair through the period, highs from the 20s to the low 30s, lows in the teens. Temperatures will be colder in the mountains. Normal Washington temperatures for the period are a high of 43 and a low of 28.

West Virginia; Today - Snow, highs from the mid 20s to the low 30s, lows in the teens.Saturday - Snow, high in the 20s.

Almanac Data for today - Sun rises 7:26 a.m., sets 5:05 p.m.; moon rises 9:39 a.m., sets 9;32 p.m. Tides: high 11:24 a.m. and 11:46 p.m., low 5:43 a.m. and 6:07 p.m. High and low tides at the following locations may be obtainted 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 (6), Norfolk (1 1/2), Virginia Beach (1), Solomons Island (6 1/2), Point Lookout (7).

The Council of Government Air Quality Index for yesterday showed the high reading in the Washington area during the 2 p.m. to 3 p.m. period was 13 for the pollutant, photochemical oxidants. 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 qaulity will be good.

The National Weather Service forecasts the Potomac River stage at Little Falls should 4.8 feet today. Temperatures ending 8 a.m. (EST) yesterday:(TABLE) City(COLUMN)H.(COLUMN)L. Albany(COLUMN)27(COLUMN)22 Albuquerque(COLUMN)44(COLUMN)35 Amarillo(COLUMN)35(COLUMN)19 Anchorage(COLUMN)32(COLUMN)25 Asheville(COLUMN)34(COLUMN)11 Atlanta(COLUMN)35(COLUMN)21 Atlantic City(COLUMN)28(COLUMN)20 Austin(COLUMN)34(COLUMN)33 Baltimore(COLUMN)29(COLUMN)16 Billings(COLUMN)26(COLUMN)14 Birmingham(COLUMN)31(COLUMN)29 Bismarck(COLUMN)2(COLUMN)-6 Boise(COLUMN)47(COLUMN)37 Boston(COLUMN)31(COLUMN)23 Brownsville(COLUMN)68(COLUMN)44 Buffalo(COLUMN)19(COLUMN)17 Burlington(COLUMN)16(COLUMN)9 Casper(COLUMN)35(COLUMN)22 Charleston, S.C.(COLUMN)40(COLUMN)32 Charon, WVa.(COLUMN)21(COLUMN)-1 Charlotte(COLUMN)37(COLUMN)23 Cheyenne(COLUMN)44(COLUMN)25 Chicago(COLUMN)18(COLUMN)9 Cincinnati(COLUMN)22(COLUMN)9 Cleveland(COLUMN)16(COLUMN)5 Columbia, S.C.(COLUMN)39(COLUMN)17 Columbus(COLUMN)16(COLUMN)2 Dal Ft. Woth(COLUMN)32(COLUMN)30 Dayton(COLUMN)18(COLUMN)5 Denver(COLUMN)40(COLUMN)22 Des Moines(COLUMN)16(COLUMN)12 Detroit(COLUMN)21(COLUMN)5 Duluth(COLUMN)13(COLUMN)4 El Paso(COLUMN)56(COLUMN)44 Fairbanks(COLUMN)14(COLUMN)3 Fargo(COLUMN)3(COLUMN)zero Flagstaff(COLUMN)35(COLUMN)18 Great Falls(COLUMN)33(COLUMN)24 Hartford(COLUMN)31(COLUMN)17 Helena(COLUMN)22(COLUMN)15 Honolulu(COLUMN)84(COLUMN)62 Houston(COLUMN)47(COLUMN)39 Indianapolis(COLUMN)21(COLUMN)15 Jackson, Miss(COLUMN)34(COLUMN)31 Jacksonville(COLUMN)47(COLUMN)32 Juneau(COLUMN)38(COLUMN)32 Kansas City(COLUMN)18(COLUMN)17 Las Vegas(COLUMN)53(COLUMN)38 Little Rock(COLUMN)26(COLUMN)19 Los Angles(COLUMN)66(COLUMN)52 Louisville(COLUMN)22(COLUMN)14 Memphis(COLUMN)30(COLUMN)26 Miami Beach(COLUMN)68(COLUMN)58 Midland-Odessa(COLUMN)38(COLUMN)25 Milwaukee(COLUMN)15(COLUMN)3 Mpls St. Paul(COLUMN)8(COLUMN)-4 Nashville(COLUMN)24(COLUMN)19 New Orleans(COLUMN)46(COLUMN)41 New York(COLUMN)21(COLUMN)19 Norfolk(COLUMN)32(COLUMN)16 North Platte(COLUMN)16(COLUMN)2 Oklahoma City(COLUMN)26(COLUMN)22 Omaha(COLUMN)18(COLUMN)15 Orlando(COLUMN)57(COLUMN)42 Philadelphia(COLUMN)27(COLUMN)15 Phoenix(COLUMN)61(COLUMN)47 Pittsburgh(COLUMN)17(COLUMN)6 Portland, Maine(COLUMN)26(COLUMN)16 Portland, Ore.(COLUMN)45(COLUMN)41 Providence(COLUMN)30(COLUMN)18 Raleigh(COLUMN)36(COLUMN)14 Rapid City(COLUMN)14(COLUMN)8 Reno(COLUMN)46(COLUMN)28 Richmond(COLUMN)34(COLUMN)10 St. Louis(COLUMN)25(COLUMN)19 St. prbg-Tampa(COLUMN)56(COLUMN)40 Salt Lake City(COLUMN)43(COLUMN)35 San Antonia(COLUMN)36(COLUMN)34 San Diego(COLUMN)65(COLUMN)56 San Francisco(COLUMN)62(COLUMN)56 San Juan(COLUMN)85(COLUMN)71 St. Ste. Marie(COLUMN)23(COLUMN)13 Seattle(COLUMN)50(COLUMN)43 Shreveport(COLUMN)32(COLUMN)20 Sloux Falls(COLUMN)15(COLUMN)8 Spokane(COLUMN)31(COLUMN)29 Syracuse(COLUMN)22(COLUMN)18 Topeka(COLUMN)21(COLUMN)18 Tucson(COLUMN)57(COLUMN)47 Tulsa(COLUMN)24(COLUMN)21 Washington(COLUMN)34(COLUMN)19 Wichita(COLUMN)22(COLUMN)21(END TABLE) Temperatures Abroad Yesterday(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)T. Alberteen(COLUMN)snow(COLUMN)1 p.m.(COLUMN)34 Amsterdam(COLUMN)rain(COLUMN)1 p.m.(COLUMN)41 Ankara(COLUMN)cloudy(COLUMN)3 p.m.(COLUMN)36 Athens(COLUMN)cloudy(COLUMN)2 p.m.(COLUMN)57 Auckland(COLUMN)pt. cldy(COLUMN)midnight(COLUMN)61 Berlin(COLUMN)haze(COLUMN)1 p.m.(COLUMN)39 Birmingham(COLUMN)clear(COLUMN)1 p.m.(COLUMN)36 Brussels(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)39 Casablanca(COLUMN)pt. cldy(COLUMN)noon(COLUMN)63 Copenhagen(COLUMN)rain(COLUMN)1 p.m.(COLUMN)34 Dublin(COLUMN)clear(COLUMN)1 p.m.(COLUMN)36 Geneva(COLUMN)snow(COLUMN)1 p.m.(COLUMN)32 Hong Kong(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)64 Lisbon(COLUMN)rain(COLUMN)noon(COLUMN)57 London(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)36 Madrid(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)41 Malta(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)61 Manlla(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)79 Moscow(COLUMN)cloudy(COLUMN)3 p.m.(COLUMN)23 New Delhi(COLUMN)clear(COLUMN)5 p.m.(COLUMN)66 Nice(COLUMN)rain(COLUMN)1 p.m.(COLUMN)45 Oslo(COLUMN)clear(COLUMN)1 p.m.(COLUMN)27 Paris(COLUMN)rain(COLUMN)1 p.m.(COLUMN)37 Peking(COLUMN)clear(COLUMN)8 p.m.(COLUMN)25 Rome(COLUMN)rain(COLUMN)1 p.m.(COLUMN)59 Sofia(COLUMN)pt. cldy(COLUMN)3 p.m.(COLUMN)32 Stockholm(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)28 Sydney(COLUMN)cloudy(COLUMN)10 p.m.(COLUMN)66 Tel Aviv(COLUMN)clear(COLUMN)2 p.m.(COLUMN)62 Tokyo(COLUMN)clear(COLUMN)9 p.m.(COLUMN)45 Tunis(COLUMN)clear(COLUMN)1 p.m.(COLUMN)63 Vienna(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)34(END TABLE) Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)clear(COLUMN)86(COLUMN)70 Barbados(COLUMN)pt. cldy(COLUMN)82(COLUMN)73 Bermuda(COLUMN)pt. cldy(COLUMN)63(COLUMN)55 Bogota(COLUMN)pt. cldy(COLUMN)64(COLUMN)35 Calpary(COLUMN)pt. cldy(COLUMN)19(COLUMN)3 Culiacan(COLUMN)clear(COLUMN)81(COLUMN)55 Edmonton(COLUMN)snow(COLUMN)5(COLUMN)-4 Havana(COLUMN)fair(COLUMN)77(COLUMN)61 Kingston(COLUMN)pt. cldy(COLUMN)79(COLUMN)72 Montogo Bay(COLUMN)cloudy(COLUMN)79(COLUMN)72 Mexico City(COLUMN)haze(COLUMN)70(COLUMN)44 Monterrey(COLUMN)clear(COLUMN)68(COLUMN)42 Montreal(COLUMN)clear(COLUMN)12(COLUMN)zero Nassau(COLUMN)clear(COLUMN)73(COLUMN)54 Ottawa(COLUMN)clear(COLUMN)12(COLUMN)-4 Regina(COLUMN)snow(COLUMN)-4(COLUMN)-11 St. Kitts(COLUMN)pt. cldy(COLUMN)84(COLUMN)70 St. Thomas(COLUMN)pt. cldy(COLUMN)85(COLUMN)70 Toronto(COLUMN)pt. cldy(COLUMN)21(COLUMN)16 Vancouver(COLUMN)clear(COLUMN)43(COLUMN)34 Veracruz(COLUMN)fair(COLUMN)79(COLUMN)59 Winnipeg(COLUMN)snow(COLUMN)5(COLUMN)-6(END TABLE) Local Temp., Humidity(TABLE) Time(COLUMN)T.(COLUMN)H. 12 midnight(COLUMN)23(COLUMN)46 1 a.m.(COLUMN)25(COLUMN)35 2 a.m.(COLUMN)24(COLUMN)38 3 a.m.(COLUMN)25(COLUMN)35 4 a.m.(COLUMN)23(COLUMN)38 5 a.m.(COLUMN)21(COLUMN)59 6 a.m.(COLUMN)24(COLUMN)33 7 a.m.(COLUMN)23(COLUMN)33 8 a.m.(COLUMN)23(COLUMN)34 9 a.m.(COLUMN)27(COLUMN)31 10 a.m.(COLUMN)30(COLUMN)27 11 a.m.(COLUMN)33(COLUMN)25 12 noon(COLUMN)36(COLUMN)20 1 p.m.(COLUMN)37(COLUMN)20 2 p.m.(COLUMN)38(COLUMN)20 3 p.m.(COLUMN)37(COLUMN)23 4 p.m.(COLUMN)37(COLUMN)22 5 p.m.(COLUMN)36(COLUMN)21 6 p.m.(COLUMN)36(COLUMN)22 7 p.m.(COLUMN)36(COLUMN)26(END TABLE)