Washington: Today - Cloudy, chance of light snow, high near 30, low from near 8 to the mid teens. The chance of precipitation is 30 percent today and near zero tonight. Wednesday - Sunny, high in the 30s.

Maryland and Virginia: Today - Cloudy, highs from the teens, to near 30, lows from near zero to the mid teens. Wednesday - Sunny, highs from the upper teens to the mid 30s.

Lower Potomac and Chesapeake Bay: Today - Chance of light snow. Visibility will be more than 5 miles except lower in snow. Wind will be from the northwest at less than 25 knots. Waves in unprotected waters will be less than 3 feet.

Extended Area Forecast for Thursday through Friday: Chance of snow on Thursday and on Friday, clearing by Saturday. Highs will be from the mid 20s to the mid 30s, lows from the teens to near 20. Normal Washington temperatures for the period are a high of 44 and a low of 27.

West Virginia: Today - Snow highs from the teens to the mid 20s, lows from near zero to [WORD ILLEGIBLE] 10. Wednesday - Partly cloudy, highs in the 20s.

Almanac Data for today - Sun rises 7:15 a.m., sets 5:28 p.m.; moon rises midnight, sets 11:11 a.m.

Tides: High 12:25 a.m. and 12:55 p.m., low 7:01 a.m. and 7:52 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).

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 24 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 unhealty 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 5 feet today. Local Temp., Humidity(TABLE) Time(COLUMN)T.(COLUMN)H. 12 m'night(COLUMN)23(COLUMN)50 1 a.m.(COLUMN)22(COLUMN)52 2 a.m.(COLUMN)23(COLUMN)50 3 a.m.(COLUMN)23(COLUMN)52 4 a.m.(COLUMN)24(COLUMN)50 5 a.m.(COLUMN)24(COLUMN)50 6 a.m.(COLUMN)22(COLUMN)55 7 a.m.(COLUMN)22(COLUMN)55 8 a.m.(COLUMN)23(COLUMN)52 9 a.m.(COLUMN)25(COLUMN)50 10 a.m.(COLUMN)28(COLUMN)44 11 a.m.(COLUMN)30(COLUMN)43 12 noon(COLUMN)31(COLUMN)41 1 p.m.(COLUMN)32(COLUMN)39 2 p.m.(COLUMN)34(COLUMN)38 3 p.m.(COLUMN)34(COLUMN)36 4 p.m.(COLUMN)34(COLUMN)38 5 p.m.(COLUMN)33(COLUMN)38 6 p.m.(COLUMN)31(COLUMN)41 7 p.m.(COLUMN)31(COLUMN)41(END TABLE) Temperatures ending 8 a.m. (EST) yesterday:(TABLE) City(COLUMN)H.(COLUMN)L. Albany(COLUMN)17(COLUMN)13 Albuquerque(COLUMN)58(COLUMN)30 Amarillo(COLUMN)25(COLUMN)23 Anchorage(COLUMN)25(COLUMN)16 Asheville(COLUMN)32(COLUMN) 8 Atlanta(COLUMN)35(COLUMN)18 Atlantic City(COLUMN)30(COLUMN)22 Austin(COLUMN)44(COLUMN)37 Baltimore(COLUMN)29(COLUMN)19 Billings(COLUMN)12(COLUMN) 1 Birmingham(COLUMN)34(COLUMN)22 Bismarck(COLUMN) 2(COLUMN) 1 Boise(COLUMN)38(COLUMN)28 Boston(COLUMN)25(COLUMN)16 Brownsville(COLUMN)55(COLUMN)48 Buffalo(COLUMN)21(COLUMN)13 Burlington(COLUMN)14(COLUMN) 6 Casper(COLUMN)33(COLUMN)15 Charleston, S.C.(COLUMN)40(COLUMN)25 Charleston, W. Va.(COLUMN)18(COLUMN)12 Charlotte(COLUMN)40(COLUMN)21 Cheyenne(COLUMN)42(COLUMN)19 Chicago(COLUMN)15(COLUMN) 5 Cincinnati(COLUMN)12(COLUMN) 7 Cleveland(COLUMN)19(COLUMN)15 Columbia, S.C.(COLUMN)40(COLUMN)13 Columbus(COLUMN)15(COLUMN)12 Dal.-Ft. Worth(COLUMN)39(COLUMN)36 Dayton(COLUMN)13(COLUMN) 2 Denver(COLUMN)33(COLUMN)19 Des Moines(COLUMN)13(COLUMN) 5 Detroit(COLUMN)25(COLUMN)18 Duluth(COLUMN)11(COLUMN) 9 El Paso(COLUMN)71(COLUMN)50 Fairbanks(COLUMN)18(COLUMN) 7 Fargo(COLUMN) 2(COLUMN) 9 Flagstaff(COLUMN)51(COLUMN)26 Great Falls(COLUMN) 6(COLUMN)15 Hartford(COLUMN)20(COLUMN)13 Helena(COLUMN)20(COLUMN) 7 Honolulu(COLUMN)81(COLUMN)65 Houston(COLUMN)45(COLUMN)41 Indianapolis(COLUMN)12(COLUMN) 5 Jackson, Miss.(COLUMN)42(COLUMN)30 Jacksonville(COLUMN)48(COLUMN)24 Juneau(COLUMN)31(COLUMN)23 Kansas City(COLUMN)16(COLUMN)13 Las Vegas(COLUMN)65(COLUMN)43 Little Rock(COLUMN)35(COLUMN)23 Los Angeles(COLUMN)75(COLUMN)55 Louisville(COLUMN)18(COLUMN) 1 Memphis(COLUMN)31(COLUMN)24 Miami Beach(COLUMN)64(COLUMN)40 Midland-Odessa(COLUMN)50(COLUMN)33 Milwaukee(COLUMN)13(COLUMN) 0 Mpls.-St. Paul(COLUMN) 8(COLUMN) 8 Nashville(COLUMN)25(COLUMN)11 New Orleans(COLUMN)48(COLUMN)39 New York(COLUMN)24(COLUMN)15 Norfolk(COLUMN)34(COLUMN)23 North Platte(COLUMN)17(COLUMN)13 Oklahoma City(COLUMN)27(COLUMN)25 Omaha(COLUMN)13(COLUMN)10 Orlando(COLUMN)58(COLUMN)32 Philadelphia(COLUMN)28(COLUMN)19 Phoenix(COLUMN)79(COLUMN)58 Pittsburgh(COLUMN)20(COLUMN)15 Portland, Maine(COLUMN)19(COLUMN) 1 Portland, Ore.(COLUMN)46(COLUMN)37 Providence(COLUMN)21(COLUMN) 9 Raleigh(COLUMN)34(COLUMN)14 Rapid City(COLUMN)19(COLUMN) 5 Reno(COLUMN)56(COLUMN)23 Richmond(COLUMN)32(COLUMN)16 St. Louis(COLUMN)16(COLUMN) 8 St. Prbg.-Tampa(COLUMN)54(COLUMN)31 Salt Lake City(COLUMN)43(COLUMN)26 San Antonio(COLUMN)45(COLUMN)35 San Diego(COLUMN)73(COLUMN)62 San Francisco(COLUMN)55(COLUMN)46 San Juan PR(COLUMN)90(COLUMN)71 St. Ste. Marie(COLUMN)17(COLUMN) 1 Seattle(COLUMN)46(COLUMN)34 Shreveport(COLUMN)45(COLUMN)29 Sioux Falls(COLUMN)10(COLUMN) 0 Spokane(COLUMN)31(COLUMN)10 Syracuse(COLUMN)21(COLUMN)12 Topeka(COLUMN)20(COLUMN)17 Tucson(COLUMN)74(COLUMN)53 Tulsa(COLUMN)29(COLUMN)24 Washington(COLUMN)31(COLUMN)25 Wichita(COLUMN)20(COLUMN)17(END TABLE)