Washington: Today - Sunny, high in the mid 30s, low near 20. The chance of precipitation is near zero today and 10 percent tonight. Wind will be light and variable. Tuesday - Increasingly cloudy, chance of snow late in the day, high in the 30s.

Maryland and Virginia: Today - Sunny, highs in the 30s, lows from near zero to the 20s. Tuesday - Increasingly cloudy, chance of snow late in the day, highs in the 30s.

Lower Potomac and Chesapeake Bay: Today - Fair with visibility of more than 5 miles. Wind will be from the northeast at from 5 to 10 knots. Waves in ice-free waters will be less than 1 foot.

Extended Area Forecast for Wednesday through Friday: There is a chance of snow on Wednesday and on Friday; otherwise it will be fair. Highs will be from the upper 20s to the low 40s, lows from the teens to the mid 20s. Normal Washington temperatures for the period are a high of 48 and a low of 29.

West Virginia: Today - Increasingly cloudy, highs from the mid 20s to the mid 30s, lows from near 8 to the teens. Snow is likely tonight. Wednesday - Snow, highs from the low 20s to near 30.

The National Weather Forecast for Today - Snow flurries will fall over the eastern Great Lakes, the upper Ohio Valley and over the western slopes of the central Appalachians. Flurries will also fall over the northern Colorado and the Wyoming Rockies. Rain will fall on the Washington Coast. Except for sunshine over southern California, the southwest deserts and northern New England, most of the nation will have partly cloudy skies. Mild temperatures will prevail from northen California through the Pacific Northwest and into western Montana. The Rockies and the rest of the nation westward to the Pacific Coast will have near seasonal temperatures. The country east of the Rockies will be cold with very cold readings over parts of the middle Mississippi Valley.

Almanac Data for today - Sun rises 6:53 a.m., sets 5:51 p.m.; moon rises 3:52 p.m., sets 5:09 a.m.; Tides: high 6:16 a.m. and 6:38 p.m., low 12:44 a.m. and 12:58 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), Solomons Island (6 1/2), Point Lookout (7). Local Temp., Humidity(TABLE) TIME(COLUMN)T.(COLUMN)H. 12 midnight(COLUMN)36(COLUMN)70 1 a.m.(COLUMN)35(COLUMN)70 2 a.m.(COLUMN)35(COLUMN)70 3 a.m.(COLUMN)33(COLUMN)59 4 a.m.(COLUMN)33(COLUMN)52 5 a.m.(COLUMN)32(COLUMN)51 6 a.m.(COLUMN)31(COLUMN)51 7 a.m.(COLUMN)30(COLUMN)53 8 a.m.(COLUMN)29(COLUMN)51 9 a.m.(COLUMN)29(COLUMN)51 10 a.m.(COLUMN)30(COLUMN)59 11 a.m.(COLUMN)31(COLUMN)45 12 noon(COLUMN)31(COLUMN)45 1 p.m.(COLUMN)31(COLUMN)45 2 p.m.(COLUMN)31(COLUMN)41 3 p.m.(COLUMN)33(COLUMN)40 4 p.m.(COLUMN)33(COLUMN)36 5 p.m.(COLUMN)32(COLUMN)36 6 p.m.(COLUMN)29(COLUMN)36 7 p.m.(COLUMN)27(COLUMN)42(END TABLE)

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 31 for the pollutant, photochemical oxidants. Index values between 25 and 49 indicate fair 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 fair.

The National Weather Service forecasts the Potomac River stage at Little Falls should be near 3.5 feet today. Temperatures ending 7 a.m. (EST) yesterday:(TABLE) CITY(COLUMN)H.(COLUMN)L. Albany(COLUMN)32(COLUMN) 7 Albuquerque(COLUMN)41(COLUMN) 27 Amarillo(COLUMN)30(COLUMN) 10 Anchorage(COLUMN)43(COLUMN) 33 Asheville(COLUMN)49(COLUMN) 30 Atlanta(COLUMN)50(COLUMN) 31 Atlantic City(COLUMN)36(COLUMN) 27 Austin(COLUMN)45(COLUMN) 24 Baltimore(COLUMN)38(COLUMN) 27 Billings(COLUMN)31(COLUMN) 14 Birmingham(COLUMN)47(COLUMN) 27 Bismarck(COLUMN)18(COLUMN) 8 Boise(COLUMN)35(COLUMN) 32 Boston(COLUMN)36(COLUMN) 25 Brownsville(COLUMN)53(COLUMN) 32 Buffalo(COLUMN)20(COLUMN) 5 Burlington(COLUMN)26(COLUMN) 6 Casper(COLUMN)20(COLUMN) 7 Charleston, S.C.(COLUMN)56(COLUMN) 46 Chastn, W.Va.(COLUMN)31(COLUMN) 12 Charlotte(COLUMN)47(COLUMN) 33 Cheyenne(COLUMN)28(COLUMN) 14 Chicago(COLUMN)23(COLUMN) 7 Cincinnati(COLUMN)25(COLUMN) -3 Cleveland(COLUMN)25(COLUMN) 1 Columbia, S.C.(COLUMN)48(COLUMN) 44 Columbia, S.C.(COLUMN)48(COLUMN) 44 Dal. Ft.-Worth(COLUMN)30(COLUMN) 10 Dayton(COLUMN)23(COLUMN) 1 Denver(COLUMN)38(COLUMN) 20 Des Moines(COLUMN)15(COLUMN) -6 Detroit(COLUMN)26(COLUMN) 6 Duluth(COLUMN)19(COLUMN) 4 El Paso(COLUMN)48(COLUMN) 27 Fairbanks(COLUMN)21(COLUMN) 2 Fargo(COLUMN) 8(COLUMN) 4 Flagstaff(COLUMN)37(COLUMN) 13 Great Falls(COLUMN)34(COLUMN) 14 Hartford(COLUMN)37(COLUMN) 13 Helena(COLUMN)42(COLUMN) 24 Honolulu(COLUMN)80(COLUMN) 65 Houston(COLUMN)45(COLUMN) 30 Indianapolis(COLUMN)22(COLUMN) -2 Jackson, Miss.(COLUMN)42(COLUMN) 21 Jackson, Miss.(COLUMN)42(COLUMN) 21 Juneau(COLUMN)42(COLUMN) 35 Kansas City(COLUMN)17(COLUMN) 1 Las Vegas(COLUMN)57(COLUMN) 41 Little Rock(COLUMN)32(COLUMN) 15 Los Angeles(COLUMN)71(COLUMN) 50 Lousiville(COLUMN)28(COLUMN) 6 Memphis(COLUMN)31(COLUMN) 18 Miami Beach(COLUMN)81(COLUMN) 67 Midland-Odessa(COLUMN)42(COLUMN) 24 Milwaukee(COLUMN)23(COLUMN)zero Mpls. St. Paul(COLUMN)17(COLUMN) -2 Nashville(COLUMN)31(COLUMN) 13 New Orleans(COLUMN)49(COLUMN) 31 New York(COLUMN)34(COLUMN) 21 Norfolk(COLUMN)45(COLUMN) 33 North Platte(COLUMN)24(COLUMN) 8 Oklahoma City(COLUMN)25(COLUMN) 8 Omaha(COLUMN)17(COLUMN) 2 Orlando(COLUMN)78(COLUMN) 61 Philadelphia(COLUMN)34(COLUMN) 21 Phoenix(COLUMN)62(COLUMN) 41 Pittsburgh(COLUMN)28(COLUMN) 12 Portland, Maine(COLUMN)36(COLUMN) 24 Portland, Ore.(COLUMN)55(COLUMN) 46 Providence(COLUMN)36(COLUMN) 22 Raleigh(COLUMN)48(COLUMN) 34 Rapid City(COLUMN)30(COLUMN) 24 Reno(COLUMN)50(COLUMN) 27 Richmond(COLUMN)48(COLUMN) 31 St. Louis(COLUMN)21(COLUMN) 3 St. Prbg.-Tpa(COLUMN)70(COLUMN) 55 Salt Lake City(COLUMN)37(COLUMN) 31 San Antonio(COLUMN)50(COLUMN) 24 San Diego(COLUMN)69(COLUMN) 51 San Francisco(COLUMN)64(COLUMN) 52 San Juan(COLUMN)88(COLUMN) 72 St. Ste. Marie(COLUMN)16(COLUMN) -6 Seattle(COLUMN)51(COLUMN) 50 Shreveport(COLUMN)31(COLUMN) 15 Sioux Falls(COLUMN)15(COLUMN)-11 Spokane(COLUMN)39(COLUMN) 35 Syracuse(COLUMN)27(COLUMN) 2 Topeka(COLUMN)18(COLUMN)-10 Tucson(COLUMN)57(COLUMN) 31 Tulsa(COLUMN)26(COLUMN) 10 Washington(COLUMN)43(COLUMN) 30 Wichita(COLUMN)20(COLUMN) 3(END TABLE) Temperatures Abroad Yesterday(TABLE) CITY(COLUMN)WEATHER(COLUMN)TIME(COLUMN)TEMP. Aberdeen(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)30 Amsterdam(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)28 Ankara(COLUMN)pt. cldy(COLUMN)3 p.m.(COLUMN)48 Athens(COLUMN)clear(COLUMN)2 p.m.(COLUMN)61 Auckland(COLUMN)pt. cldy(COLUMN)midnight(COLUMN)68 Berlin(COLUMN)haze(COLUMN)1 p.m.(COLUMN)25 Birmingham(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)34 Brussels(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)30 Casablanca(COLUMN)cloudy(COLUMN)noon(COLUMN)66 Copenhagen(COLUMN)clear(COLUMN)1 p.m.(COLUMN)25 Dublin(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)37 Geneva(COLUMN)rain(COLUMN)1 p.m.(COLUMN)36 Hong Kong(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)57 Lisbon(COLUMN)rain(COLUMN)noon(COLUMN)57 London(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)36 Madrid(COLUMN)rain(COLUMN)1 p.m.(COLUMN)54 Malta(COLUMN)clear(COLUMN)1 p.m.(COLUMN)64 Manila(COLUMN)clear(COLUMN)8 p.m.(COLUMN)77 Moscow(COLUMN)pt. cldy(COLUMN)3 p.m.(COLUMN)19 New Delhi(COLUMN)clear(COLUMN)5 p.m.(COLUMN)66 Nice(COLUMN)rain(COLUMN)1 p.m.(COLUMN)48 Oslo(COLUMN)clear(COLUMN)1 p.m.(COLUMN)48 Paris(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)32 Peking(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)32 Rome(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)59 Saigon(COLUMN)clear(COLUMN)8 p.m.(COLUMN)81 Sofia(COLUMN)cloudy(COLUMN)2 p.m.(COLUMN)30 Stockholm(COLUMN)clear(COLUMN)1 p.m.(COLUMN)19 Sydney(COLUMN)clear(COLUMN)10 p.m.(COLUMN)79 Tel Aviv(COLUMN)cloudy(COLUMN)2 p.m.(COLUMN)64 Tokyo(COLUMN)clear(COLUMN)9 p.m.(COLUMN)39 Tunis(COLUMN)clear(COLUMN)1 p.m.(COLUMN)75 Vienna(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)25 Warsaw(COLUMN)clear(COLUMN)1 p.m.(COLUMN)19(END TABLE) Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)cloudy(COLUMN)87(COLUMN)73 Barbados(COLUMN)fair(COLUMN)82(COLUMN)77 Bermuda(COLUMN)cloudy(COLUMN)77(COLUMN)67 Calgary(COLUMN)pt. cldy(COLUMN)36(COLUMN)23 Culiacan(COLUMN)fair(COLUMN)80(COLUMN)50 Edmonton(COLUMN)cloudy(COLUMN)37(COLUMN)23 Havana(COLUMN)cloudy(COLUMN)85(COLUMN)72 Kingston(COLUMN)fair(COLUMN)86(COLUMN)75 Montego Bay(COLUMN)fair(COLUMN)86(COLUMN)70 Mexico City(COLUMN)cloudy(COLUMN)68(COLUMN)54 Monterrey(COLUMN)pt. cldy(COLUMN)57(COLUMN)36 Montreal(COLUMN)clear(COLUMN)23(COLUMN) 3 Nassau(COLUMN)cloudy(COLUMN)82(COLUMN)66 Ottawa(COLUMN)clear(COLUMN)19(COLUMN)zero Regina(COLUMN)cloudy(COLUMN)23(COLUMN) 3 St. Kitts(COLUMN)fair(COLUMN)83(COLUMN)73 Toronto(COLUMN)clear(COLUMN)21(COLUMN) 1 Vancouver(COLUMN)cloudy(COLUMN)46(COLUMN)45 Veracruz(COLUMN)cloudy(COLUMN)68(COLUMN)59 Winnipeg(COLUMN)cloudy(COLUMN) 9(COLUMN) 7(END TABLE)