Washington: Today - Partly cloudy today, snow tonight, high in mid to upper 40s, low in low to mid 30s. Chance of precipitation 20 per cent today, 70 per cent tonight. Sunday - Snow ending, highs in mid to upper 30s.

Maryland and Virginia: Today - Partly cloudy today with snow likely tonight, highs in 40s, lows in 20s and 30s. Sunday - Snow ending, highs in 30s and 40s.

Lower Potomac and Chesapeake Bay: Today - Partly cloudy today with snow likely tonight visibility 5 miles or more, decreasing to less than 2 miles tonight. Winds should be west to northwesterly at 10 to 18 knots today, northwesterly at 8 to 15 knots tonight.

Extended Area Outlook: For Monday through Wednesday - Fair skies with temperatures ranging from Monday's high in 30s, low in teens to Wednesday's high in 50s, low near 30. Washington's normal temperature range for this time of year is from 47 to 29.

ALMANAC DATA FOR Saturday, Feb. 19: Sun rises 6:55 a.m., sets 5:50 p.m. moon rises 7:26 a.m., sets 7:41 p.m. Tides: High 9:03 a.m. and 9:23 p.m., low 3:18 a.m. and 3:41 p.m. High and low tides at the following points can be obtained by subtracting the hours indicated from the tides above. Annapolis (3 1/4); Bloody Point Lighthouse (4 1/2); Deele, Md. (4 1/2); Colonial Beach (6); Norfolk (1 1/2); Virginia Beach (1); Solomon's Island (6 1/2); Point Lookout (7).

The National Weather Sirvice forecasts that the Potomac River stage at Little Falls will remain near 3.4 feet through today.

Washington data at 7 p.m. (EST) yesterday: Highest temperature since 7 a.m. yesterday, 39 degrees at 1:35 p.m. Lowest temperature since midnight, 17 degrees at 6:30 a.m. Record high temperature for today, 74 degrees in 1939. Record low temperature for today, 4 degrees in 1903. Deficiency of temperature since Feb. 1, 1939 degrees. Deficiency of temperature since Jan. 1, 1903 degrees. Relative humidity: Maximum, 81 per cent at 5 a.m.; Minimum, 37 per cent at 1 p.m. 24-hour precipitation, none. Deficiency of precipitation since Feb. 1, 1.48 inches. Deficiency of precipitation since Jan. 1, 2.60 inches. Highest observed wind since 7 a.m., 10 miles per hour from the south at noon. Peak gust since 7 a.m., 16 miles per hour from the south at 11:49 a.m. Local Temp., Humidity(TABLE) Time(COLUMN)T.(COLUMN)H. 12 m'night(COLUMN)22(COLUMN)45 1 a.m.(COLUMN)25(COLUMN)40 2 a.m.(COLUMN)21(COLUMN)54 3 a.m.(COLUMN)21(COLUMN)68 4 a.m.(COLUMN)19(COLUMN)77 5 a.m.(COLUMN)18(COLUMN)81 6 a.m.(COLUMN)19(COLUMN)81 7 a.m.(COLUMN)19(COLUMN)77 8 a.m.(COLUMN)22(COLUMN)74 9 a.m.(COLUMN)25(COLUMN)63 10 a.m.(COLUMN)31(COLUMN)49 11 a.m.(COLUMN)35(COLUMN)38 12 noon(COLUMN)37(COLUMN)40 1 p.m.(COLUMN)38(COLUMN)37 2 p.m.(COLUMN)38(COLUMN)38 3 p.m.(COLUMN)38(COLUMN)40 4 p.m.(COLUMN)39(COLUMN)42 5 p.m.(COLUMN)38(COLUMN)50 6 p.m.(COLUMN)36(COLUMN)54(END TABLE) Temperatures ending 7 a.m. (EST) yesterday:(TABLE) City(COLUMN)H.(COLUMN)L. Albany(COLUMN)21(COLUMN)02 Albuquerque(COLUMN)65(COLUMN)30 Amarillo(COLUMN)70(COLUMN)33 Anothorage(COLUMN)34(COLUMN)26 Asheville(COLUMN)38(COLUMN)20 Atlanta(COLUMN)45(COLUMN)28 Atlantic City(COLUMN)28(COLUMN)18 Austin(COLUMN)77(COLUMN)45 Baltimore(COLUMN)31(COLUMN)10 Billings(COLUMN)56(COLUMN)37 Birmingham(COLUMN)52(COLUMN)39 Bismarck(COLUMN)38(COLUMN)25 Boise(COLUMN)60(COLUMN)30 Boston(COLUMN)23(COLUMN)17 Brownsville(COLUMN)74(COLUMN)59 Buffalo(COLUMN)17(COLUMN)08 Burlington, Vt.(COLUMN)16(COLUMN)09 Casper(COLUMN)52(COLUMN)28 Charleston, S.C.(COLUMN)45(COLUMN)37 Charlton, W. Va.(COLUMN)28(COLUMN)17 Charlotte, N.C.(COLUMN)41(COLUMN)26 Cheyenne(COLUMN)54(COLUMN)33 Chicago(COLUMN)36(COLUMN)30 Cincinnati(COLUMN)32(COLUMN)24 Cleveland(COLUMN)24(COLUMN)11 Columbia, S.C.(COLUMN)46(COLUMN)25 Columbus, Ohio(COLUMN)24(COLUMN)16 Del-Ft. Worth(COLUMN)77(COLUMN)41 Devon(COLUMN)29(COLUMN)23 Denver(COLUMN)62(COLUMN)35 Des Moines(COLUMN)52(COLUMN)24 Detroit(COLUMN)31(COLUMN)20 Duluth(COLUMN)33(COLUMN)15 El Paso(COLUMN)75(COLUMN)32 Fairbanks(COLUMN)14(COLUMN)-09 Fairgo(COLUMN)27(COLUMN)14 Flagstaff(COLUMN)66(COLUMN)24 Great Falls(COLUMN)55(COLUMN)34 Hartford(COLUMN)23(COLUMN)07 Helena(COLUMN)55(COLUMN)37 Honolulu(COLUMN)81(COLUMN)64 Houston(COLUMN)74(COLUMN)56 Indianapolis(COLUMN)36(COLUMN)25 Jackson, Miss.(COLUMN)69(COLUMN)52 Jacksonville(COLUMN)52(COLUMN)29 Junesu(COLUMN)40(COLUMN)39 Kansas City(COLUMN)61(COLUMN)29 Las Vegas(COLUMN)80(COLUMN)46 Little Rock(COLUMN)65(COLUMN)46 Los Angeles(COLUMN)80(COLUMN)55 Louisville(COLUMN)41(COLUMN)30 Memphis(COLUMN)58(COLUMN)43 Miami Beach(COLUMN)60(COLUMN)45 Midland(COLUMN)82(COLUMN)35 Milwaukee(COLUMN)35(COLUMN)23 Mpis.-St. PauL(COLUMN)42(COLUMN)18 Nashville(COLUMN)46(COLUMN)38 New Orleans(COLUMN)70(COLUMN)53 New York(COLUMN)26(COLUMN)18 Norfolk(COLUMN)34(COLUMN)16 North Platte(COLUMN)58(COLUMN)17 Oklahoma City(COLUMN)72(COLUMN)36 Omaha(COLUMN)61(COLUMN)23 Orlando(COLUMN)56(COLUMN)30 Philadelphia(COLUMN)28(COLUMN)14 Phoenix(COLUMN)86(COLUMN)55 Pittsburgh(COLUMN)21(COLUMN)10 Portland, Me.(COLUMN)22(COLUMN)04 Portland, Ore.(COLUMN)60(COLUMN)-39 Providence(COLUMN)24(COLUMN)12 Raleigh(COLUMN)36(COLUMN)12 Rapid City(COLUMN)55(COLUMN)30 Reno(COLUMN)65(COLUMN)25 Richmond(COLUMN)37(COLUMN)13 St. Louis(COLUMN)49(COLUMN)34 St. Prbg-Tampa(COLUMN)56(COLUMN)40 Salt Lake City(COLUMN)60(COLUMN)29 San Antonio(COLUMN)76(COLUMN)40 San Diego(COLUMN)71(COLUMN)55 San Francisco(COLUMN)72(COLUMN)54 San Juan, P.R.(COLUMN)86(COLUMN)70 St. Ste. Marie(COLUMN)21(COLUMN)18 Seattle(COLUMN)54(COLUMN)49 Shreveport(COLUMN)76(COLUMN)47 Sioux Fallis(COLUMN)43(COLUMN)21 Spokane(COLUMN)52(COLUMN)24 Syracuse(COLUMN)22(COLUMN)03 Tucson(COLUMN)81(COLUMN)49 Tulsa(COLUMN)71(COLUMN)38 Washington(COLUMN)33(COLUMN)17 Wichita(COLUMN)72(COLUMN)25(END TABLE) Temperatures Abroad Yesterday(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)Temp. Aberdeen(COLUMN)raiN(COLUMN)1 p.m.(COLUMN)43 Amsterdam(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)43 Arkara(COLUMN)cloudy(COLUMN)3 p.m.(COLUMN)50 Athens(COLUMN)clear(COLUMN)2 p.m.(COLUMN)59 Auckland(COLUMN)cloudy(COLUMN)midnight(COLUMN)68 Berlin(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)41 Birmingham(COLUMN)rain(COLUMN)1 p.m.(COLUMN)41 Brussels(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)48Cairo clear(COLUMN)2 p.m.(COLUMN)68 Casablanca(COLUMN)clear(COLUMN)noon(COLUMN)61 Copenhagen(COLUMN)rain(COLUMN)1 p.m.(COLUMN)36 Duplin(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)43 Geneva(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)48 Hong Kong(COLUMN)clear(COLUMN)8 p.m.(COLUMN)52 Lisbon(COLUMN)cloudy(COLUMN)noon(COLUMN)55 Lordon(COLUMN)rain(COLUMN)1 p.m.(COLUMN)46 Madrid(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)50 Malta(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)61 Manila(COLUMN)pt. cldy(COLUMN)8 p.m.(COLUMN)73 Moscow(COLUMN)snow(COLUMN)3 p.m.(COLUMN)27 New Delhi(COLUMN)pt. cldy(COLUMN)5 p.m.(COLUMN)75 Nice(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)54 Oslo(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)21 Paris(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)48 Peking(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)30 Rome(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)61 Saigon(COLUMN)clear(COLUMN)8 p.m.(COLUMN)77 Sofia(COLUMN)clear(COLUMN)2 p.m.(COLUMN)48 Stockholm(COLUMN)clear(COLUMN)1 p.m.(COLUMN)25 Sydney(COLUMN)cloudy(COLUMN)10 p.m.(COLUMN)73 Tel Aviv(COLUMN)clear(COLUMN)2 p.m.(COLUMN)66 Tokyo(COLUMN)clear(COLUMN)9 p.m.(COLUMN)36 Tunis(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)59 Vienna(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)39 Warsaw(COLUMN)clear(COLUMN)1 p.m.(COLUMN)34(END TABLE) Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)Low Ataculco(COLUMN)cloudy(COLUMN)93(COLUMN)77 Barbados(COLUMN)pt. cldy(COLUMN)83(COLUMN)75 Bermuda(COLUMN)pt. cldy(COLUMN)64(COLUMN)51 Catgary(COLUMN)clear(COLUMN)45(COLUMN)25 Egmonton(COLUMN)clear(COLUMN)39(COLUMN)23 Havana(COLUMN)cloudy(COLUMN)64(COLUMN)57 Montego Bay(COLUMN)cloudy(COLUMN)77(COLUMN)71 Mexico City(COLUMN)cloudy(COLUMN)68(COLUMN)50 Monterrey(COLUMN)clear(COLUMN)81(COLUMN)48 Montreal(COLUMN)clear(COLUMN)14(COLUMN)5 Nassau(COLUMN)pt. cludy(COLUMN)70(COLUMN)57 Ottawa(COLUMN)pt. cldy(COLUMN)18(COLUMN)1 Regina(COLUMN)pt. cldy(COLUMN)37(COLUMN)19 St. Kitts(COLUMN)fair(COLUMN)84(COLUMN)70 St. Thomas(COLUMN)pt. cldy(COLUMN)85(COLUMN)75 Toronto(COLUMN)clear(COLUMN)21(COLUMN)12 Vancouver(COLUMN)cloudy(COLUMN)52(COLUMN)45 Veracruz(COLUMN)cloudy(COLUMN)52(COLUMN)45 Winnipeg(COLUMN)clear(COLUMN)19(COLUMN)-2(END TABLE)