Washington: Today - Cloudy, snow likely tonight, high near [WORD ILLEGIBLE] low near 30. Wind will be from the southeast at near 10 mph this morning, shifting to from the northeast at near 15 mph tonight. The chance of precipitation is 50 per cent today and 80 per cent tonight. Wednesday - Partly cloudy, high near 40.

Maryland and Virgninia: Today - Cloudy, snow likely by tonight, highs from the 30s to the low 40s, lows from the 20s to the low 30s. Wednesday - Partly cloudy, highs from the 30s to the low 40s.

Lower Potomac and Chesapeake Bay: Today - Fair, snow likely tonight. Visibility will be more than 5 miles today, dropping to less than 2 miles in snow tonight. Wind knots today, shifting to from the northeast at up to 22 knots tonight. Waves in ice-free waters will be near 2 feet.

Extended Area Forecast for Thursday through Saturday: Snow is possible late Friday or on Saturday. Otherwise, it will be fair during the period. Highs will be from the 30s to the low 40s, lows from the 20s to the low 30s. Normal Washington temperatures for the period are a high of 50 and a low of 31.

West Virginia: Today - Cloudy, snow likely tonight, highs in the 30s, lows from the teens to the low 20s. Wednesday - Snow flurries, highs from the upper 20s to the mid 30s.

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 25 for the pollutant, photochemical oxidents. Index values between 25 and 49 indicate fair air quality. When the index exceeds 100 the air is considered very healthy and individuals with lung, heart and eye ailments are urged to restrict their activity. The forecast for today indicates that the air quality will improve.

The National Weather Service forecasts the Potomac River stage at Little Falls should be near 3.4 feet today.

The National Weather Forecast for today - Rain will reach from the lower Mississippi Valley to the southern half of the Atlantic Coast except for southern Florida. Snow is likely from the middle Mississippi Valley into the Ohio Valley, most of the Great Lakes, the northern and central Appalachians and the mid- Atlantic Coast. Showers will fall over most in the northern Rockies. Cloudy skies will also prevail over the southern Rockies and the central and southern Plains. Temperatures will be colder in most of the Plains and warmer along the eastern Gulf and southern Atlantic coasts. Little temperature change elsewhere.

Almanac Data for today: Sun rises 6:42 a.m., set 6:01 p.m. Moon sets 9:53 a.m. Tides: high 11:38 a.m., low 5:46 a.m. and 6:33 p.m. High and low tides at the following locations may be obtained by subtracting the hours indicated from the hours above: Annapolis (11 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).

Washington data at 7 p.m. (EST) yesterday: Highest temperature since 7 a.m. yesterday, 40 degrees at 4:30 p.m. Lowest temperature since midnight, 26 degrees at 6:36 a.m. Deficiency of temperature since Feb. 1, 149 degrees. Deficiency of temperature since Jan. 1, 239 degrees. Record high temperature for today, 82 degrees in 19:48. Record low temperature for today, - 1 degrees in 1934. Relative humidity: Maximum, 48 per cent at 7 a.m.; Minimum, 34 per cent at 3 p.m. Deficiency of precipitation since Feb. 1, 1.93 inches. Excess of precipitation since Jan. 1, 2.56 inches. Highest observed wind since 7 a.m. 18 miles per hour form the northwest at 10 a.m. Peak gust since 8 a.m., 29 miles per hour from the northwest at 9:39 a.m. Local Temp., Humidity(TABLE) Time(COLUMN)T.(COLUMN)H. 12 midnight(COLUMN)33(COLUMN)49 1 a.m.(COLUMN)33(COLUMN)43 2 a.m.(COLUMN)32(COLUMN)45 3 a.m.(COLUMN)30(COLUMN)45 4 a.m.(COLUMN)28(COLUMN)44 5 a.m.(COLUMN)27(COLUMN)46 6 a.m.(COLUMN)27(COLUMN)46 7 a.m.(COLUMN)26(COLUMN)48 8 a.m.(COLUMN)28(COLUMN)46 9 a.m.(COLUMN)31(COLUMN)41 10 a.m.(COLUMN)32(COLUMN)41 11 a.m.(COLUMN)34(COLUMN)38 12 noon(COLUMN)35(COLUMN)37 1 p.m.(COLUMN)36(COLUMN)35 2 p.m.(COLUMN)37(COLUMN)35 3 p.m.(COLUMN)38(COLUMN)34 4 p.m.(COLUMN)38(COLUMN)34 5 p.m.(COLUMN)37(COLUMN)35 6 p.m.(COLUMN)36(COLUMN)37 7 p.m.(COLUMN)35(COLUMN)38(END TABLE) Temperatures ending 7 a.m. (EST) yesterday:(TABLE) City(COLUMN)H.(COLUMN)L. Albany(COLUMN)31(COLUMN)18 Albuquerque(COLUMN)65(COLUMN)44 Amarillo(COLUMN)50(COLUMN)37 Anchorage(COLUMN)41(COLUMN)24 Asheville(COLUMN)44(COLUMN)19 Altanta(COLUMN)54(COLUMN)28 Atlantic City(COLUMN)39(COLUMN)25 Austin(COLUMN)67(COLUMN)54 Baltimore(COLUMN)41(COLUMN)24 Billings(COLUMN)21(COLUMN) 8 Birmingham(COLUMN)50(COLUMN)25 Bismarck(COLUMN)16(COLUMN) 3 Boise(COLUMN)49(COLUMN)34 Boston(COLUMN)38(COLUMN)24 Brownsville(COLUMN)81(COLUMN)66 Buffalo(COLUMN)26(COLUMN) 3 Burlington(COLUMN)27(COLUMN)15 Casper(COLUMN)42(COLUMN)27 Charleston, S. C.(COLUMN)58(COLUMN)38 Charleston, W. Va(COLUMN)34(COLUMN)22 Charlotte(COLUMN)53(COLUMN)25 Cheyenne(COLUMN)48(COLUMN)19 Chicago(COLUMN)25(COLUMN)12 Cincinnati(COLUMN)27(COLUMN) 6 Cleveland(COLUMN)32(COLUMN)19 Columbia, S. C.(COLUMN)60(COLUMN)25 Columbus(COLUMN)28(COLUMN)20 Dal.-Ft. Worth(COLUMN)58(COLUMN)44 Dayton(COLUMN)28(COLUMN) 9 Denver(COLUMN)53(COLUMN)29 Des Moines(COLUMN)20(COLUMN)19 Detroit(COLUMN)29(COLUMN) 8 Duluth(COLUMN)20(COLUMN)11 El Paso(COLUMN)74(COLUMN)57 Fairbanks(COLUMN)35(COLUMN)14 Fargo(COLUMN)11(COLUMN) 5 Great Falls(COLUMN)27(COLUMN)16 Hartford(COLUMN)33(COLUMN)23 Helena(COLUMN)38(COLUMN)24 Honolulu(COLUMN)82(COLUMN)70 Houston(COLUMN)67(COLUMN)52 Indianapolis(COLUMN)28(COLUMN) 9 Jackson, Miss.(COLUMN)55(COLUMN)32 Jacksonville(COLUMN)71(COLUMN)40 Juneau(COLUMN)38(COLUMN)22 Kansas City(COLUMN)29(COLUMN)24 Las Vegas(COLUMN)72(COLUMN)56 Little Rock(COLUMN)46(COLUMN)26 Los Angeles(COLUMN)66(COLUMN)53 Louisville(COLUMN)32(COLUMN)17 Memphis(COLUMN)47(COLUMN)27 Miami Beach(COLUMN)74(COLUMN)59 Midland-Odessa(COLUMN)71(COLUMN)53 Milwaukee(COLUMN)26(COLUMN)10 Mpls.-St. Paul(COLUMN)19(COLUMN) 3 Nashville(COLUMN)38(COLUMN)22 New Orleans(COLUMN)58(COLUMN)41 Norfolk(COLUMN)45(COLUMN)33 North Platte(COLUMN)35(COLUMN)23 Oklahoma City(COLUMN)50(COLUMN)36 Omaha(COLUMN)23(COLUMN)18 Orlando(COLUMN)77(COLUMN)51 Philadelphia(COLUMN)38(COLUMN)22 Phoenix(COLUMN)75(COLUMN)59 Pittsburgh(COLUMN)32(COLUMN)18 Portland, Me.(COLUMN)37(COLUMN)17 Portland, Ore(COLUMN)52(COLUMN)42 Providence(COLUMN)34(COLUMN)20 Raleigh(COLUMN)47(COLUMN)20 Rapid City(COLUMN)30(COLUMN)17 Reno(COLUMN)58(COLUMN)29 Richmond(COLUMN)47(COLUMN)20 St. Louis(COLUMN)29(COLUMN)18 St. Prbg.-Tampa(COLUMN)70(COLUMN)47 Salt Lake City(COLUMN)58(COLUMN)36 San Antonio(COLUMN)64(COLUMN)52 San Diego(COLUMN)64(COLUMN)58 San Francisco(COLUMN)57(COLUMN)50 San Juan(COLUMN)86(COLUMN)71 St. Ste. Marie(COLUMN)19(COLUMN)12 Seattle(COLUMN)49(COLUMN)37 Shreveport(COLUMN)59(COLUMN)35 Sioux Falls(COLUMN)17(COLUMN)16 Spokane(COLUMN)37(COLUMN)34 Syracuse(COLUMN)30(COLUMN)16 Topeka(COLUMN)30(COLUMN)23 Tucson(COLUMN)72(COLUMN)51 Tulsa(COLUMN)47(COLUMN)31 Washington(COLUMN)45(COLUMN)26 Wichita(COLUMN)39(COLUMN)31(END TABLE) Temperature Abroad Yesterday(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)Temp Aberdeen(COLUMN)Cloudy(COLUMN)1 p.m.(COLUMN)46 Amsterdam(COLUMN)pt. Cloudy(COLUMN)1 p.m.(COLUMN)54 Ankara(COLUMN)cloudy(COLUMN)3 p.m.(COLUMN)59 Athens(COLUMN)clear(COLUMN)2 p.m.(COLUMN)64 Auckland(COLUMN)clear(COLUMN)midnight(COLUMN)64 Berlin(COLUMN)clear(COLUMN)1 p.m.(COLUMN)55 Birmingham(COLUMN)rain(COLUMN)1 p.m.(COLUMN)50 Brussels(COLUMN)rain(COLUMN)1 p.m.(COLUMN)54 Casablanca(COLUMN)pt. cldy.(COLUMN)noon(COLUMN)64 Copenhagen(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)34 Geneva(COLUMN)rain(COLUMN)1 p.m.(COLUMN)43 Hong Kong(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)66 Lisbon(COLUMN)pt. cldy.(COLUMN)noon(COLUMN)59 London(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)52 Madrid(COLUMN)rain(COLUMN)1 p.m.(COLUMN)50 Malta(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)66 Manila(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)79 Moscow(COLUMN)Cloudy(COLUMN)3 p.m.(COLUMN)28 New Delhi(COLUMN)pt. cldy.(COLUMN)5 p.m.(COLUMN)81 Nice(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)50 Oslo(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)34 Paris(COLUMN)rain(COLUMN)1 p.m.(COLUMN)48 Peking(COLUMN)pt. cldy.(COLUMN)8 p.m.(COLUMN)32 Rome(COLUMN)clear(COLUMN)1 p.m.(COLUMN)63 Saigon(COLUMN)pt. cldy.(COLUMN)8 p.m.(COLUMN)84 Sofia(COLUMN)pt. cldy.(COLUMN)2 p.m.(COLUMN)32 Stockholm(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)36 Sydney(COLUMN)clear(COLUMN)10 p.m.(COLUMN)79 Tel Aviv(COLUMN)dust(COLUMN)2 p.m.(COLUMN)68 Tokyo(COLUMN)clear(COLUMN)9 p.m.(COLUMN)50 Tunis(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)73 Vienna(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)52 Warsaw(COLUMN)clear(COLUMN)1 p.m.(COLUMN)39(END TABLE) Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)fair(COLUMN)88(COLUMN)73 Barbados(COLUMN)pt. cldy.(COLUMN)84(COLUMN)77 Bermuda(COLUMN)pt. cldy.(COLUMN)71(COLUMN)60 Bogota(COLUMN)cloudy(COLUMN)72(COLUMN)45 Calgary(COLUMN)clear(COLUMN)30(COLUMN) 0 Edmonton(COLUMN)clear(COLUMN)28(COLUMN) 4 Havana(COLUMN)fair(COLUMN)77(COLUMN)63 Kingston(COLUMN)cloudy(COLUMN)86(COLUMN)78 Montego Bay(COLUMN)fair(COLUMN)83(COLUMN)70 Mexico City(COLUMN)fair(COLUMN)77(COLUMN)63 Monterrey(COLUMN)cloudy(COLUMN)79(COLUMN)63 Montreal(COLUMN)pt. cldy.(COLUMN)23(COLUMN) 9 Nassau(COLUMN)fair(COLUMN)73(COLUMN)50 Ottawa(COLUMN)pt. cldy.(COLUMN)70(COLUMN)23 Regina(COLUMN)snow(COLUMN) 9(COLUMN)-13 St. Kitts(COLUMN)fair(COLUMN)84(COLUMN)73 St. Thomas(COLUMN)pt. cldy.(COLUMN)83(COLUMN)72 Toronto(COLUMN)snow(COLUMN)25(COLUMN) 7 Vancouver(COLUMN)clear(COLUMN)48(COLUMN)30 Veracruz(COLUMN)fair(COLUMN)77(COLUMN)61 Winnipeg(COLUMN)snow(COLUMN) 9(COLUMN)5(END TABLE)