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

Maryland and Virginia: Today - Sunny, highs from the mid 20s to the 30s, lows from near 10 to near 20. Tuesday - Partly cloudy, chance of rain spreading eastward during the day, highs in the 30s.

Lower Potomac and Chesapeake Bay: Today - Fair with visibility of more than 5 miles. WInd will be variable at less than 10 knots. Waves in unprotected waters will be near 1 foot.

Extended Area Forecast for Wednesday through Friday: Rain is likely on Wednesday, clearing on Thursday. Rain will be likely on Friday. Highs will be near 40, lows in the 20s. Normal Washington temperatures for the period are a high of 44 and a low of 27.

West Virginia: Today - Sunny, highs from the low 30s to the low 40s. Tuesday - Partly cloudy, chance of rain in the south and snow in the north by tonight, highs from the mid 30s to the mid 40s.

The National Weather Forecast for today - Rain will scatter through the central Gulf States. Snow is expected in the western end of the Great Lakes, while snow flurries will fall through the northern and central Rockies. Temperatures will be seasonably mild from the upper Mississippi Valley through the upper Missouri Valley. Temperatures will remain cool or cold over the remainder of the nation.

Almanac Data for today - Sun rises 7:21 a.m., sets 5:19 p.m.; moon rises 5:15 p.m., sets 6:32 a.m.

The Council of Governments' Air Quality Index for yesterday showed the high reading in the Washington area during the 9 a.m. to 10 a.m. period was 15 for the pullutant, 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 3.0 feet today. Local Temp., Humidity(TABLE) Time(COLUMN)T.(COLUMN)H. 12 mid.(COLUMN)31(COLUMN)51 1 a.m.(COLUMN)30(COLUMN)56 2 a.m.(COLUMN)27(COLUMN)57 3 a.m.(COLUMN)27(COLUMN)58 4 a.m.(COLUMN)26(COLUMN)60 5 a.m.(COLUMN)25(COLUMN)60 6 a.m.(COLUMN)25(COLUMN)57 7 a.m.(COLUMN)25(COLUMN)57 8 a.m.(COLUMN)25(COLUMN)57 9 a.m.(COLUMN)26(COLUMN)58 10 a.m.(COLUMN)29(COLUMN)51 12 noon(COLUMN)32(COLUMN)49 1 p.m.(COLUMN)33(COLUMN)49 2 p.m.(COLUMN)33(COLUMN)47 3 p.m.(COLUMN)34(COLUMN)46 4 p.m.(COLUMN)34(COLUMN)45 5 p.m.(COLUMN)34(COLUMN)47 6 p.m.(COLUMN)34(COLUMN)47 7 p.m.(COLUMN)34(COLUMN)47(END TABLE) Temperatures ending 8 a.m. (EST) yesterday:(TABLE) City(COLUMN)H.(COLUMN)L. Albany(COLUMN)21(COLUMN) 5 Albuquerque(COLUMN)41(COLUMN)25 Amarillo(COLUMN)38(COLUMN)16 Anchorage(COLUMN)36(COLUMN)29 Asheville(COLUMN)31(COLUMN)17 Atlanta(COLUMN)36(COLUMN)27 Atlantic City(COLUMN)31(COLUMN)22 Austin(COLUMN)31(COLUMN)26 Baltimore(COLUMN)33(COLUMN)19 Billings(COLUMN)25(COLUMN)19 Birmingham(COLUMN)29(COLUMN)27 Bismarck(COLUMN)13(COLUMN) 8 Boise(COLUMN)49(COLUMN)33 Boston(COLUMN)29(COLUMN)19 Brownsville(COLUMN)43(COLUMN)36 Buffalo(COLUMN)22(COLUMN)16 Burlington(COLUMN)12(COLUMN) 4 Casper(COLUMN)28(COLUMN)16 Charleston, S.C.(COLUMN)48(COLUMN)35 Cha'st'n, W.Va.(COLUMN)26(COLUMN)19 Charlotte(COLUMN)43(COLUMN)27 Cheyenne(COLUMN)35(COLUMN)13 Chicago(COLUMN)22(COLUMN) 1 Cincinnati(COLUMN)25(COLUMN) 4 Cleveland(COLUMN)24(COLUMN)15 Columbia, S.C.(COLUMN)46(COLUMN)28 Columbus(COLUMN)22(COLUMN) 7 Dal.-Ft. Worth(COLUMN)28(COLUMN)13 Dayton(COLUMN)34(COLUMN) 3 Denver(COLUMN)43(COLUMN)13 Des Moines(COLUMN)18(COLUMN) 6 Detroit(COLUMN)25(COLUMN) 7 Duluth(COLUMN)15(COLUMN) 0 El Paso(COLUMN)48(COLUMN)29 Fairbanks(COLUMN)18(COLUMN) 3 Fargo(COLUMN) 4(COLUMN) 0 Flagstaff(COLUMN)41(COLUMN)14 Great Falls(COLUMN)35(COLUMN)25 Hartford(COLUMN)28(COLUMN) 5 Helena(COLUMN)43(COLUMN)20 Honolulu(COLUMN)86(COLUMN)68 Houston(COLUMN)34(COLUMN)32 Indianapolis(COLUMN)22(COLUMN) 4 Jackson, Miss.(COLUMN)30(COLUMN)29 Jacksonville(COLUMN)50(COLUMN)34 Juneau(COLUMN)39(COLUMN)33 Kansas City(COLUMN)22(COLUMN)19 Las Vegas(COLUMN)60(COLUMN)37 Little Rock(COLUMN)30(COLUMN)22 Los Angeles(COLUMN)69(COLUMN)50 Louisville(COLUMN)26(COLUMN) 7 Memphis(COLUMN)33(COLUMN)26 Miami Beach(COLUMN)63(COLUMN)52 Midlan-Odessa(COLUMN)34(COLUMN)22 Milwaukee(COLUMN)23(COLUMN) 1 Mpls.-St. Paul(COLUMN) 9(COLUMN) 5 Nashville(COLUMN)31(COLUMN)21 New Orleans(COLUMN)39(COLUMN)37 New York(COLUMN)25(COLUMN)18 Norfolk(COLUMN)43(COLUMN)31 North Plate(COLUMN)23(COLUMN) 3 Oklahoma City(COLUMN)24(COLUMN)16 Omaha(COLUMN)15(COLUMN) 9 Orlando(COLUMN)56(COLUMN)42 Philadephia(COLUMN)29(COLUMN)15 Phoenix(COLUMN)61(COLUMN)44 Pittsburgh(COLUMN)24(COLUMN)11 Portland, M'ne.(COLUMN)25(COLUMN)10 Portland, Ore.(COLUMN)53(COLUMN)34 Providence(COLUMN)29(COLUMN)12 Raleigh(COLUMN)39(COLUMN)24 Rapid City(COLUMN)32(COLUMN)16 Rena(COLUMN)52(COLUMN)29 Richmond(COLUMN)39(COLUMN)19 St. Louis(COLUMN)17(COLUMN) 6 St. Prbg.-Tampa(COLUMN)53(COLUMN)40 Salt Lake City(COLUMN)45(COLUMN)30 San Antonia(COLUMN)35(COLUMN)26 San Diego(COLUMN)68(COLUMN)52 San Francisco(COLUMN)57(COLUMN)51 San Juan(COLUMN)85(COLUMN)71 St. Ste. Marie(COLUMN)22(COLUMN) 5 Seattle(COLUMN)50(COLUMN)41 Shreveport(COLUMN)30(COLUMN)26 Sioux Falls(COLUMN)14(COLUMN) 3 Spokane(COLUMN)40(COLUMN)33 Syracuse(COLUMN)19(COLUMN) 6 Topeka(COLUMN)21(COLUMN)29 Tucson(COLUMN)56(COLUMN)39 Tulsa(COLUMN)24(COLUMN)23 Washington(COLUMN)36(COLUMN)23 Wichita(COLUMN)19(COLUMN) 8(END TABLE) Temperatures Abroad Yesterday(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)Temp. Aberdeen(COLUMN)rain(COLUMN) 1 p.m.(COLUMN)41 Amsterdam(COLUMN)pt. cldy(COLUMN) 1 p.m.(COLUMN)36 Ankara(COLUMN)snow(COLUMN) 3 p.m.(COLUMN)32 Athens(COLUMN)cloudy(COLUMN) 2 p.m.(COLUMN)55 Auckland(COLUMN)clear(COLUMN)midnight(COLUMN)66 Berlin(COLUMN)snow(COLUMN) 1 p.m.(COLUMN)30 Birmingham(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN)43 Brussels(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)36 Cairo(COLUMN)clear(COLUMN) 2 p.m.(COLUMN)72 Casablanca(COLUMN)cloudy(COLUMN)noon(COLUMN)59 Copenhagen(COLUMN)snow(COLUMN) 1 p.m.(COLUMN)32 Dublia(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)39 Geneva(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)37 Hong Kong(COLUMN)clear(COLUMN) 8 p.m.(COLUMN)59 Lisbon(COLUMN)pt. cldy(COLUMN)noon(COLUMN)54 London(COLUMN)pt. cldy(COLUMN) 1 p.m.(COLUMN)45 Madrid(COLUMN)pt. cldy(COLUMN) 1 p.m.(COLUMN)46 Malta(COLUMN)pt. cldy(COLUMN) 1 p.m.(COLUMN)52 Manila(COLUMN)clear(COLUMN) 8 p.m.(COLUMN)73 Moscow(COLUMN)clear(COLUMN) 3 p.m.(COLUMN)10 New Delhi(COLUMN)clear(COLUMN) 5 p.m.(COLUMN)64 Nice(COLUMN)pt. cldy(COLUMN) 1 p.m.(COLUMN)48 Oslo(COLUMN)snow(COLUMN) 1 p.m.(COLUMN)27 Paris(COLUMN)rain(COLUMN) 1 p.m.(COLUMN)36 Peking(COLUMN)clear(COLUMN) 8 p.m.(COLUMN)25 Rome(COLUMN)pt. cldy(COLUMN) 1 p.m.(COLUMN)54 Saigon(COLUMN)clear(COLUMN) 8 p.m.(COLUMN)81 Sofla(COLUMN)snow(COLUMN) 2 p.m.(COLUMN)32 Stockholm(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)32 Sydney(COLUMN)cloudy(COLUMN)10 p.m.(COLUMN)75 Tel Aviv(COLUMN)clear(COLUMN) 2 p.m.(COLUMN)64 Tokyo(COLUMN)clear(COLUMN) 9 p.m.(COLUMN)39 Tunis(COLUMN)pt. cldy(COLUMN) 1 p.m.(COLUMN)59 Vienna(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)37 Warsaw(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)21(END TABLE) Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)pt. cldy(COLUMN)88(COLUMN)73 Barbados(COLUMN)fair(COLUMN)82(COLUMN)75 Bermuda(COLUMN)cloudy(COLUMN)74(COLUMN)65 Calgary(COLUMN)clear(COLUMN)39(COLUMN)16 Culiacan(COLUMN)clear(COLUMN)81(COLUMN)54 Edmonton(COLUMN)rain(COLUMN)27(COLUMN) 9 Havana(COLUMN)rain(COLUMN)72(COLUMN)66 Kingston(COLUMN)pt. cldy(COLUMN)86(COLUMN)70 Montego Bay(COLUMN)pt. cldy(COLUMN)84(COLUMN)72 Mexico City(COLUMN)haze(COLUMN)70(COLUMN)50 Montreal(COLUMN)cloudy(COLUMN)19(COLUMN) 3 Nassau(COLUMN)cloudy(COLUMN)70(COLUMN)66 Ottawa(COLUMN)pt. cldy(COLUMN)19(COLUMN) 1 Regina(COLUMN)cloudy(COLUMN)12(COLUMN) 2 St. Kitts(COLUMN)pt. cldy(COLUMN)83(COLUMN)68 St. Thomas(COLUMN)pt. cldy(COLUMN)83(COLUMN)75 Toronto(COLUMN)snow(COLUMN)18(COLUMN) 3 Vancouver(COLUMN)clear(COLUMN)48(COLUMN)41 Veracruz(COLUMN)pt. cldy(COLUMN)73(COLUMN)64 Winnipeg(COLUMN)clear(COLUMN) 1(COLUMN) 4(END TABLE)