Washington: Today -- Sunny and cold, high 30 to 35, low 20 to 25. The chance of precipitation is 10 percent through tonight. Winds will be from the northeast at near 10 mph. Thursday -- Mostly cloudy and cold, high again 30 to 35.

Maryland and Virginia: Today -- Sunny and cold, high from the mid 20s to the 30s, lows in the teens and the 20s. Thursday -- Cloudy, with a chance of snow in the west, high in the 20s and 30s.

West Virginia: Today -- Partly cloudy, highs from the mid teens in the northern panhandle to the 30s in the south and east, lows in the teens and 20s. Thursday -- Snow likely, highs from the low 20s to the low 30s.

Extended Area Forecast for Friday through Sunday -- Snow likely on Friday, may be rain hear the coast, highs will average from the upper 20s to the low 40s, lows in the 20s to the low 30s. Normal Washington area temperatures are a high of 43 and a low of 28.

Lower Potomac and Chesapeake Bay -- Fair with visibility of 5 miles or more. Winds will be from the northeast at 10 to 15 knots. Waves will average near 1 foot.

The Nation Yesterday: A cold front passed through the southtern half of the Plateau region bringing some snow to the area. Snow was also widely scattered over the upper Great Lakes, the northern Plains and the northern Rockies. Skies were mostly clear across the upper and middle Mississippi and Tennessee Valleys and into the Atlantic and eastern Gulf Coast states. Unseasonably cold temperatures were once again in evidence over most of the nation. Temperatures were below zero throughout much of Minnesota. Maximum readings failed to reach the freezing point over a large area extending across the northern Plateau, the northern and central Rockies, the upper and middle Mississippi Valley, the Ohio Valley and the northern Atlantic Coast states. Except for 50 and a few 60 degree readings in California, the southwestern deserts and Florida, afternoon highs over the rest of the nation were only in the 30s and 40s.

The National Weather Forecast for Today -- Snowshowers are probable along the lower Great Lakes region with snow reaching from Montana across the central Rockies into northwest Texas and across the central Plains, the middle Mississippi Valley and Indiana. A band of freezing rain will extend across northeastern Oklahoma into northern Arkansas with rain or drizzle over the Washington coast and through the remainder of the southern Plains and Arkansas. Cloudy skies will prevail over the northern two thirds of the Pacific Coast and into the northern and central Plateau. Mostly sunny skies are expected over the remainder of the nation. Very cold temperatures are forecast across the northern and central Rockies, northwest Texas, the northern two thirds of the Plains, the upper and middle Mississipp Valley, and most of the Ohio Valley. Elsewhere temperatures will be seasonably cold.

Almance Data for today: The sun rises 7:27 a.m., sets 5:05 p.m.; The moon rises 2:02 p.m., sets 3:47 a.m. Tides: high 5:49 a.m. and 6:04 p.m., low 12:31 a.m. and 12:28 p.m. High and low tides at the following locations may be obtained by subtracting the hours indicated from the hours above: Annapolis (3 1/4), Bloody Point Lighthouse (4 1/2), Deale, Md. (4 1/2), Colonial Beach (5 1/2), Norfolk (1), Virginia Beach (3/4), Solomons Island (6 1/4), Point Lookout (7).

The Council of Government's Air Quality Index for yesterday showed the high reading in the Washington area during the 3 p.m. period was 18 for the pollutant, photochemical oxidants. Index values between 0 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 remain about the same.

The National Weather Service forecasts the Potomac River stage at Little Falls should remain near 5.0 feet today.

Washington data for yesterday: Highest temperature since midnight yesterday, 34 degrees at 4:40 p.m. Lowest temperature since midnight, 17 degrees at 7:20 a.m. Excess of temperature since Jan. 1, 5 degrees. Record high temperature for today, 70 degrees in 1950. Record low temperature for today, -- 3 degrees in 1875. Relative humidity: maximum, 51 percent at 8 a.m.; minimum, 34 percent at 1 p.m. 24 hour precipitation, none. Excess of precipitation since Jan. 1, 2.14 inches. Highest observed wind since 7 a.m., 13 miles per hour from the northwest at 8 a.m. Peak gust since 7 a.m., 16 miles per hour from the northwest at 11 a.m.

Local Temp., Humidity (TABLE) Time(COLUMN)T.(COLUMN)H. 12 mid.(COLUMN)27(COLUMN)51 1 a.m.(COLUMN)26(COLUMN)50 2 a.m.(COLUMN)25(COLUMN)48 3 a.m.(COLUMN)21(COLUMN)45 4 a.m.(COLUMN)20(COLUMN)47(KEY OFF)5 a.m. 20(COLUMN)47 6 a.m.(COLUMN)18(COLUMN)51 7 a.m.(COLUMN)18(COLUMN)51 8 a.m.(COLUMN)18(COLUMN)51 9 a.m.(COLUMN)20(COLUMN)47 10 a.m.(COLUMN)22(COLUMN)43 11 a.m.(COLUMN)23(COLUMN)40 12 noon(COLUMN)26(COLUMN)37 1 p.m.(COLUMN)29(COLUMN)34 2 p.m.(COLUMN)30(COLUMN)36 3 p.m.(COLUMN)32(COLUMN)36 4 p.m.(COLUMN)32(COLUMN)36 5 p.m.(COLUMN)32(COLUMN)40 6 p.m.(COLUMN)31(COLUMN)39 7 p.m.(COLUMN)30(COLUMN)45 8 p.m.(COLUMN)28(COLUMN)53 9 p.m.(COLUMN)29(COLUMN)53 10 p.m.(COLUMN)26(COLUMN)63 11 p.m.(COLUMN)27(COLUMN)60(END TABLE)

Temperatures ending 7 p.m. (EST) yesterday: (TABLE) $ City(COLUMN)L.(COLUMN)H. Albany(COLUMN)06(COLUMN)24 Albuquerque(COLUMN)21(COLUMN)43 Amarillo(COLUMN)11(COLUMN)28 Anchorage(COLUMN)18(COLUMN)25 Asheville(COLUMN)11(COLUMN)38 Atlanta(COLUMN)11(COLUMN)41 Atlantic City(COLUMN)20(COLUMN)27 Austin(COLUMN)22(COLUMN)36 Baltimore(COLUMN)15(COLUMN)30 Billings(COLUMN)-03(COLUMN)09 Birmingham(COLUMN)12(COLUMN)36 Bismarck(COLUMN)-09(COLUMN)08 Boise(COLUMN)13(COLUMN)20 Boston(COLUMN)25(COLUMN)31 Brownsville(COLUMN)41(COLUMN)46 Buffalo(COLUMN)05(COLUMN)16 Burlington, Vt.(COLUMN)10(COLUMN)19 Casper(COLUMN)07(COLUMN)26 Charl'ton, S.C.(COLUMN)28(COLUMN)41 Charl'ton, W.V.(COLUMN)05(COLUMN)24 Charlotte(COLUMN)15(COLUMN)39 Cheyenne(COLUMN)07(COLUMN)37 Chicago(COLUMN)05(COLUMN)18 Cincinnati(COLUMN)-04(COLUMN)20 Cleveland(COLUMN)-01(COLUMN)16 Columbia, S.C.(COLUMN)18(COLUMN)47 Columbus(COLUMN)-05(COLUMN)18 Dal.-Ft. Worth(COLUMN)26(COLUMN)44 Dayton(COLUMN)-04(COLUMN)19 Denver(COLUMN)03(COLUMN)31 Des Moines(COLUMN)06(COLUMN)15 Detrofit(COLUMN)00(COLUMN)17 Duluth(COLUMN)-15(COLUMN)-05 El Paso(COLUMN)28(COLUMN)50 Evansville(COLUMN)08(COLUMN)29 Fairbanks(COLUMN)-13(COLUMN)-08 Fargo(COLUMN)-20(COLUMN)-07 Flagstaff(COLUMN)20(COLUMN)35 Great Falls(COLUMN)-08(COLUMN)09 Hartford(COLUMN)18(COLUMN)20 Helena(COLUMN)-18(COLUMN)14 Honolulu(COLUMN)72(COLUMN)78 Houston(COLUMN)30(COLUMN)44 Indianapolis(COLUMN)-04(COLUMN)19 Jackson(COLUMN)13(COLUMN)38 Jacksonville(COLUMN)22(COLUMN)49 Juneau(COLUMN)-02(COLUMN)18 Kansas City(COLUMN)04(COLUMN)19 Las Vegas(COLUMN)41(COLUMN)51 Little Rock(COLUMN)13(COLUMN)35 Los Angeles(COLUMN)51(COLUMN)66 Louisville(COLUMN)01(COLUMN)26 Memphis(COLUMN)11(COLUMN)32 Miami Beach(COLUMN)61(COLUMN)69 Midland(COLUMN)21(COLUMN)44 Milwaukee(COLUMN)04(COLUMN)11 Mols.-St. P'ul(COLUMN)-03(COLUMN)02 Nashville(COLUMN)07(COLUMN)32 New Orleans(COLUMN)26(COLUMN)40 New York(COLUMN)20(COLUMN)30 Norfolk(COLUMN)24(COLUMN)33 North Platte(COLUMN)-14(COLUMN)12 Oklahoma City(COLUMN)19(COLUMN)39 Omaha(COLUMN)06(COLUMN)16 Orlando(COLUMN)36(COLUMN)61 Philadelphia(COLUMN)17(COLUMN)26 Phoenix(COLUMN)44(COLUMN)54 Pittsburgh(COLUMN)-03(COLUMN)13 Portland, Me.(COLUMN)20(COLUMN)27 Portland, Ore.(COLUMN)22(COLUMN)33 Providence(COLUMN)22(COLUMN)29 Raleigh(COLUMN)18(COLUMN)38 Rapid City(COLUMN)02(COLUMN)18 Reno(COLUMN)24(COLUMN)33 Richmond(COLUMN)20(COLUMN)34 St. Louis(COLUMN)09(COLUMN)23 St. Prbg.-Ta'pa(COLUMN)35(COLUMN)58 Salt Lake City(COLUMN)13(COLUMN)25 San Antonio(COLUMN)23(COLUMN)30 San Diego(COLUMN)54(COLUMN)60 San Francisco(COLUMN)49(COLUMN)58 San Juan(COLUMN)70(COLUMN)83 St. Ste. Marie(COLUMN)04(COLUMN)11 Seattle(COLUMN)35(COLUMN)43 Shreveport(COLUMN)16(COLUMN)42 Sioux Falls(COLUMN)02(COLUMN)14 Spokane(COLUMN)00(COLUMN)18 Syracuse(COLUMN)09(COLUMN)18 Topeka(COLUMN)-07(COLUMN)19 Tucson(COLUMN)43(COLUMN)55 Tulsa(COLUMN)17(COLUMN)39 Washington(COLUMN)17(COLUMN)34 Wichita(COLUMN)08(COLUMN)23(END TABLE)

Temperatures (Western Hemisphere) (TABLE) $ City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)clear(COLUMN)90(COLUMN)72 Barbados(COLUMN)pt. cldy.(COLUMN)84(COLUMN)66 Bermuda(COLUMN)fair(COLUMN)75(COLUMN)65 Bogota(COLUMN)fair(COLUMN)68(COLUMN)40 Calgary(COLUMN)snow(COLUMN)19(COLUMN)-04 Edmonton(COLUMN)snow(COLUMN)19(COLUMN)12 Havana(COLUMN)cloudy(COLUMN)75(COLUMN)66 Kingston(COLUMN)fair(COLUMN)82(COLUMN)70 Montego Bay(COLUMN)fair(COLUMN)82(COLUMN)70 Mexico City(COLUMN)fair(COLUMN)70(COLUMN)43 Monterrey(COLUMN)cloudy(COLUMN)43(COLUMN)34 Montreal(COLUMN)snow(COLUMN)23(COLUMN)07 Nassau(COLUMN)fair(COLUMN)82(COLUMN)64 Ottawa(COLUMN)clear(COLUMN)21(COLUMN)07 Regina(COLUMN)snow(COLUMN)12(COLUMN)-06 St. Kitts(COLUMN)pt. cldy.(COLUMN)84(COLUMN)69 Toronto(COLUMN)snow(COLUMN)23(COLUMN)05 Vancouver(COLUMN)cloudy(COLUMN)37(COLUMN)23 Vera Cruz(COLUMN)cloudy(COLUMN)72(COLUMN)64 Winnipeg(COLUMN)clear(COLUMN)09(COLUMN)-26(END TABLE)(KEYWORD)