Washington: Today - Partly cloudy, high in mid 20s, low near 10. The chance of precipitation is near zero through tonight. Wednesday - Sunny, high near 30.

Maryland and Virginia: Today - Partly cloudy, highs from the teens to the mid 20s, lows from near 10 below zero to the mid teens. Wednesday - Sunny, highs from the teens to near 30.

Lower Potomac and Chesapeake Bay: Today - Partly cloudy, with visibility of more than 5 miles. Wind will be from the northwest at up to 35 knots. Waves in unprotected waters will be less than 4 feet.

West Virginia: Today - Partly cloudy, highs from near 5 to the teens, lows from near 15 below zero to near zero. Wednesday - Partly cloudy, from near 5 to near 20.

Extended Area Forecast for Thursday through Saturday: Chance of snow on Friday or Saturday, except for possible rain in southeastern Virginia. Highs will be from the 30s to the low 40s, lows from the teens to the upper 20s. Normal Washington temperatures for the period are a high of 43 and a low of 28.

The National Weather Forecast for today - Snow will fall over the northern Appalachians and the lower Great Lakes, with scattered rain extending into the Ohio Valley. Rain will cover the Pacific Coast, while rain or snow will scatter over the Plateau. Light snow will fall along the eastern slopes of the northern Rockies and over the central Plains. Partly cloudy skies will dominate other sections of the country. Very cold temperatures are likely from the northern Rockies across the central Plains and the Mississippi Valley to the Atlantic Coast. Seasonably cold readings will prevail over the southern Rockies, the Plateau and the Pacific Coast.

Almanac Data for today - Sun rises 7:27 a.m., sets 5:05 p.m.; moon rises 7:29 a.m., sets 6:05 p.m.; Tides: high 8:49 a.m. and 9:16 p.m., low 3:11 a.m. and 3:28 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 (6), Norfolk (1 1/2), Virginia Beach (1), Sofomons 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 21 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 quality will be good.

The National Weather Service forecasts the Potomac River stage at Little Falls should be near 4.5 feet today. Local Temp., Humidity(TABLE) Time(COLUMN)T.(COLUMN)H. 12 midnite(COLUMN)58(COLUMN)-- 1 a.m.(COLUMN)62(COLUMN)90 2 a.m.(COLUMN)62(COLUMN)90 3 a.m.(COLUMN)44(COLUMN)83 4 a.m.(COLUMN)41(COLUMN)79 5 a.m.(COLUMN)39(COLUMN)82 6 a.m.(COLUMN)38(COLUMN)76 7 a.m.(COLUMN)35(COLUMN)82 8 a.m.(COLUMN)33(COLUMN)79 9 a.m.(COLUMN)32(COLUMN)61 10 a.m.(COLUMN)28(COLUMN)75 11 a.m.(COLUMN)26(COLUMN)66 12 noon(COLUMN)25(COLUMN)53 1 p.m.(COLUMN)25(COLUMN)44 2 p.m.(COLUMN)25(COLUMN)46 3 p.m.(COLUMN)25(COLUMN)38 4 p.m.(COLUMN)24(COLUMN)33 5 p.m.(COLUMN)22(COLUMN)38 6 p.m.(COLUMN)21(COLUMN)39 7 p.m.(COLUMN)18(COLUMN)37(END TABLE) Temperatures ending 8 a.m. (EST) yesterday:(TABLE) City(COLUMN)H.(COLUMN)L. Albany(COLUMN) 48(COLUMN) 24 Albuquerque(COLUMN) 48(COLUMN) 24 Amarillo(COLUMN) 34(COLUMN) 10 Anchorage(COLUMN) 29(COLUMN) 21 Asheville(COLUMN) 56(COLUMN) 11 Atlanta(COLUMN) 60(COLUMN) 12 Atlantic City(COLUMN) 56(COLUMN) 51 Austin(COLUMN) 58(COLUMN) 26 Baltimore(COLUMN) 57(COLUMN) 36 Billings(COLUMN) 1(COLUMN) 0 Birmingham(COLUMN) 61(COLUMN) 16 Bismarch(COLUMN)- 5(COLUMN)-14 Boise(COLUMN) 43(COLUMN) 33 Boston(COLUMN) 55(COLUMN) 43 Brownsville(COLUMN) 77(COLUMN) 44 Buffalo(COLUMN) 43(COLUMN) 17 Burlington(COLUMN) 39(COLUMN) 36 Casper(COLUMN) 17(COLUMN) 12 Chas'tn, S.C.(COLUMN) 68(COLUMN) 35 Chas'tn, W.Va.(COLUMN) 61(COLUMN) 12 Charlotte(COLUMN) 66(COLUMN) 28 Cheyenne(COLUMN) 25(COLUMN) 9 Chicago(COLUMN) 38(COLUMN)- 1 Cincinnati(COLUMN) 55(COLUMN) 1 Cleveland(COLUMN) 48(COLUMN) 14 Columbia, S.C.(COLUMN) 70(COLUMN) 26 Columbus(COLUMN) 50(COLUMN) 7 Dal.-Ft. Worth(COLUMN) 46(COLUMN) 17 Dayton(COLUMN) 50(COLUMN) 3 Denver(COLUMN) 37(COLUMN) 12 Des Moines(COLUMN) 10(COLUMN)- 6 Detroit(COLUMN) 36(COLUMN) 12 Duluth(COLUMN) 2(COLUMN)-19 El Paso(COLUMN) 57(COLUMN) 26 Fairbanks(COLUMN) 6(COLUMN)- 3 Fargo(COLUMN)- 9(COLUMN)-19 Flagstaff(COLUMN) 58(COLUMN) 20 Great Falls(COLUMN) 1(COLUMN) 0 Hartford(COLUMN) 55(COLUMN) 35 Helena(COLUMN) 18(COLUMN) 8 Honolulu(COLUMN) 83(COLUMN) 74 Houston(COLUMN) 62(COLUMN) 31 Indianapolis(COLUMN) 42(COLUMN) 4 Jackson, Miss.(COLUMN) 62(COLUMN) 20 Jacksonville(COLUMN) 74(COLUMN) 40 Juneau(COLUMN) 25(COLUMN) 10 Kansas City(COLUMN) 22(COLUMN) 0 Las Vegas(COLUMN) 64(COLUMN) 38 Little Rock(COLUMN) 41(COLUMN) 12 Los Angeles(COLUMN) 75(COLUMN) 55 Louisville(COLUMN) 56(COLUMN) 4 Memphis(COLUMN) 59(COLUMN) 17 Miami Beach(COLUMN) 78(COLUMN) 66 Midl'd-Odessa(COLUMN) 50(COLUMN) 21 Milwaukee(COLUMN) 34(COLUMN)- 3 Mpls.-St. Paul(COLUMN) 3(COLUMN)-16 Nashville(COLUMN) 61(COLUMN) 7 New Orleans(COLUMN) 63(COLUMN) 31 New York(COLUMN) 55(COLUMN) 53 Norfolk(COLUMN) 66(COLUMN) 51 North Platte(COLUMN) 11(COLUMN) 4 Oklahoma City(COLUMN) 36(COLUMN) 11 Omaha(COLUMN) 8(COLUMN)- 6 Orlando(COLUMN) 74(COLUMN) 54 Philadelphia(COLUMN) 61(COLUMN) 41 Phoenix(COLUMN) 76(COLUMN) 45 Pittsburgh(COLUMN) 49(COLUMN) 16 Portland, Me.(COLUMN) 48(COLUMN) 42 Portland, Ore.(COLUMN) 43(COLUMN) 35 Providence(COLUMN) 50(COLUMN) 42 Raleigh(COLUMN) 68(COLUMN) 34 Rapid City(COLUMN) 4(COLUMN) 1 Reno(COLUMN) 52(COLUMN) 37 Richmond(COLUMN) 68(COLUMN) 38 St. Louis(COLUMN) 36(COLUMN) 1 St. Prbg.-T'rno(COLUMN) 69(COLUMN) 51 Salt Lake City(COLUMN) 47(COLUMN) 31 San Antonio(COLUMN) 61(COLUMN) 27 San Diego(COLUMN) 73(COLUMN) 58 San Francisco(COLUMN) 62(COLUMN) 55 San Juan(COLUMN) 83(COLUMN) 71 St. Ste. Marie(COLUMN) 29(COLUMN)- 9 Seattle(COLUMN) 50(COLUMN) 49 Shreveport(COLUMN) 55(COLUMN) 20 Sioux Falls(COLUMN)- 2(COLUMN)-13 Spokane(COLUMN) 33(COLUMN) 33 Syracuse(COLUMN) 50(COLUMN) 26 Topeka(COLUMN) 18(COLUMN) 1 Tucson(COLUMN) 74(COLUMN) 42 Tulsa(COLUMN) 33(COLUMN) 9 Washington(COLUMN) 62(COLUMN) 35 Wichita(COLUMN) 24(COLUMN) 9(END TABLE) Temperatures Abroad Yesterday(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)Temp. Aberdeen(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN)39 Amsterdam(COLUMN)rain(COLUMN) 1 p.m.(COLUMN)39 Ankara(COLUMN)snow(COLUMN) 3 p.m.(COLUMN)34 Athens(COLUMN)snow(COLUMN) 2 p.m.(COLUMN)-- Auckland(COLUMN)cloudy(COLUMN)midnight(COLUMN)-- Berlin(COLUMN)rain(COLUMN) 1 p.m.(COLUMN)32 Birmingham(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN)45 Brussels(COLUMN)rain(COLUMN) 1 p.m.(COLUMN)39 Casablanca(COLUMN)rain(COLUMN)noon(COLUMN)63 Copenhagen(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN)34 Dublin(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)41 Geneva(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN)30 Hong Kong(COLUMN)cldy(COLUMN) 8 p.m.(COLUMN)64 Lisbon(COLUMN)cloudy(COLUMN)noon(COLUMN)52 London(COLUMN)rain(COLUMN) 1 p.m.(COLUMN)48 Madrid(COLUMN)pt. cldy(COLUMN) 1 p.m.(COLUMN)46 Malta(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)55 Manila(COLUMN)pt. cldy(COLUMN) 8 p.m.(COLUMN)79 Moscow(COLUMN)cloudy(COLUMN) 3 p.m.(COLUMN)32 New Delhi(COLUMN)clear(COLUMN) 5 p.m.(COLUMN)66 Nice(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN)46 Oslo(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN)36 Paris(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN)41 Peking(COLUMN)clear(COLUMN) 8 p.m.(COLUMN)27 Rome(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)50 Saigon(COLUMN)clear(COLUMN) 8 p.m.(COLUMN)82 Sofia(COLUMN)clear(COLUMN) 2 p.m.(COLUMN)27 Stockholm(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN)34 Sydney(COLUMN)cloudy(COLUMN)10 p.m.(COLUMN)70 Tel Aviv(COLUMN)cloudy(COLUMN) 2 p.m.(COLUMN)52 Tokyo(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)57 Tunis(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)57 Vienna(COLUMN)snow(COLUMN) 1 p.m.(COLUMN)27 Warsaw(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN)30(END TABLE) Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)fair(COLUMN) 87(COLUMN) 76 Barbados(COLUMN)fair(COLUMN) 82(COLUMN) 77 Bermuda(COLUMN)cloudy(COLUMN) 72(COLUMN) 67 Bogota(COLUMN)pt. cldy(COLUMN) 68(COLUMN) 40 Calgary(COLUMN)snow(COLUMN) -4(COLUMN) -8 Culiacan(COLUMN)pt. cldy(COLUMN) 90(COLUMN) 54 Edmonton(COLUMN)snow(COLUMN) -4(COLUMN) -8 Havana(COLUMN)pt. cldy(COLUMN) 81(COLUMN) 68 Kingston(COLUMN)pt. cldy(COLUMN) 66(COLUMN) 72 Montego Bay(COLUMN)pt. cldy(COLUMN)84(COLUMN)73 Mexicao City(COLUMN)pt. cldy(COLUMN) 64(COLUMN) 45 Monterrey(COLUMN)clear(COLUMN) 73(COLUMN) 37 Montreal(COLUMN)rain(COLUMN) 39(COLUMN)36 Ottawa(COLUMN)sleet(COLUMN) 36(COLUMN) 18 Regina(COLUMN)clear(COLUMN)-11(COLUMN)-27 St. Kitts(COLUMN)fair(COLUMN) 84$71 St. Thomas(COLUMN)fair(COLUMN) 85(COLUMN)76 Toronto(COLUMN)cloudy(COLUMN) 39(COLUMN) 12 Vancouver(COLUMN)fog(COLUMN) 31(COLUMN)34 Veracruz(COLUMN)cloudy(COLUMN) 79(COLUMN) 61 Winnipes(COLUMN)clear(COLUMN)-13(COLUMN)-26(END TABLE)