Washington: Today - Sunny and cool, high around 40, low in the low 20s. Chance of rain near zero through tonight. Winds from the northwest at 10 to 20 m.p.h. Friday - Mostly sunny and warmer, high around 50.

Maryland and Virginia: Today - Sunny and cool, highs from high 30s to mid 40s. Friday - Mostly sunny and warmer, highs from mid 40s to low 50s.

Extended Area Forecast for Saturday through Monday: Fair and mild Saturday, highs in mid 40s to lower 50s, lows in 30s. Partly cloudy and colder Sunday and Monday, highs from mid 30s to low 40s, lower in upper 20s.

Lower Potomac and Chesapeake Bay: Fair, with visibility of five miles or more. Winds from northwest at 15 to 20 knots, gusting to 25 knots early this morning. Waves will be from 2 to 4 feet.

The Nation Yesterday: Snow showers were spread across much of the Great Lakes area into parts of central and northern New England. Drizzle and light rain extended along portions of the Texas and the Louisiana Gulf Coast region. Temperature were mostly at or below freezing from the northern and central Rockies across the northern half of the Plains through the Great Lakes. Reading in the 50s and 60s prevailed in California and from the southeastern third of Texas across Louisiana to the Atlantic from Florida to southern Georgia. There were a few 70 degree readings in southern California and southern Florida. There were clear to partly cloudy skies in parts of Oregon and northern California, the Southwest, from the northern Plains into the upper Mississippi Valley and over portions of the southeastern United States. Coast region through the Plains and Mississippi Valley to the South and Middle Atlantic Coast. Temperatures will be mild in the northern halves of the Plains and the Mississippi Valley. Cool to cold temperatures will prevail through the remainder of the nation.

The National Weather Forecast for today: Rain will cover much of Washington state. Widely scatlered showers like in southern Texas. Snow showers will fall in parts of the northern Rockies, from eastern Lake Superior through eastern lower Michigan and the lower Great Lakes into northern New England. Skies will be most sunny from the south and central Pacific.

Almanac Data for today: The sun rises 7:19 a.m., sets 4:47 p.m.; moon rises 5:22 p.m., sets 7:04 a.m. Tides: high 7:57 a.m. and 8:1 p.m., low 3:02 a.m. and 3:10 p.m. High and low tides at the following locations may be obtained by subsracting 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 1/4), Norfolk (1), Virginia Beach (3/4), Solomons Islands (6 1/4), Point Lookout (7).

The Council of Governments's Air Quality Index for yesterday showed the high reading in the Washington area during the 3 p.m. period was 13 for the pollutant, photochemical oxidants. Index values between 0-24 indicate good air quality. When the index exceeds 100 the air is considered very unhealthy and individuals with lund, heart and eye ailments are urges to restric their activity. The forecast for today indicates that the air quality will continue to be good.

The National Weather Service forecasts the Potomac River stage at Little Falls shoudl rise 4.2 feet today.

Washington data for yesterday: Highest temperature since midnight yesterday, 60 degrees at 2:40 p.m. Lowest temperature since midnight, 31 degrees at 4:30 a.m. Excess of temperature since Dec. 1.98 degrees. Excess of temperature since Jan. 1, 314 degrees. Record high temperature for today, 70 degrees in 1931. Record low temperature for today, 6 degrees in 1904. Relative humidity: Maximum, 75 percent at 5 a.m.; minimum, 25 percent at 3 p.m.

24 hour precipitation, none. Excess of precipitation since Dec. 1,88 inches. Excess of precipitation since Jan. 1, .71 inches. Highest observed wind since 7 a.m., 16 miles per hour from the southwest at 1:53 p.m.

Peak gust since 7 a.m., 25 miles per hour from the southwest at 2:06 p.m.

Local Temp., Humidity(TABLE) Time(COLUMN)T.(COLUMN)H. 12 midnight(COLUMN)36(COLUMN)64 1 a.m.(COLUMN)34(COLUMN)69 2 a.m.(COLUMN)33(COLUMN)72 3 a.m.(COLUMN)33(COLUMN)75 4 a.m.(COLUMN)33(COLUMN)72 5 a.m.(COLUMN)32(COLUMN)75 6 a.m.(COLUMN)34(COLUMN)72 7 a.m.(COLUMN)33(COLUMN)72 8 a.m.(COLUMN)33(COLUMN)72 9 a.m.(COLUMN)37(COLUMN)62 10 a.m.(COLUMN)42(COLUMN)51 11 a.m.(COLUMN)46(COLUMN)44 12 noon(COLUMN)52(COLUMN)35 1 p.m.(COLUMN)55(COLUMN)31 2 p.m.(COLUMN)59(COLUMN)26 3 p.m.(COLUMN)60(COLUMN)25 4 p.m.(COLUMN)59(COLUMN)26 5 p.m.(COLUMN)57(COLUMN)29 6 p.m.(COLUMN)55(COLUMN)31 7 p.m.(COLUMN)56(COLUMN)30 8 p.m.(COLUMN)54(COLUMN)30 9 p.m.(COLUMN)51(COLUMN)33 10 p.m.(COLUMN)50(COLUMN)32 11 p.m.(COLUMN)47(COLUMN)34(END TABLE)

Temperatures ending 7 p.m. (EST) yesterday(TABLE) City(COLUMN)L.(COLUMN)H. Albany(COLUMN)28(COLUMN)40 Albuquerque(COLUMN)25(COLUMN)47 Amarillo(COLUMN)26(COLUMN)40 Anchorage(COLUMN)26(COLUMN)33 Asheville(COLUMN)21(COLUMN)58 Atlanta(COLUMN)27(COLUMN)62 Atlantic City(COLUMN)33(COLUMN)48 Austin(COLUMN)44(COLUMN)62 Baltimore(COLUMN)27(COLUMN)58 Billings(COLUMN)12(COLUMN)27 Birmingham(COLUMN)25(COLUMN)58 Bismarck(COLUMN)16(COLUMN)30 Boise(COLUMN)20(COLUMN)31 Boston(COLUMN)31(COLUMN)45 Brownsville(COLUMN)56(COLUMN)66 Buffalo(COLUMN)33(COLUMN)39 Burlington(COLUMN)27(COLUMN)35 Casper(COLUMN)04(COLUMN)23 Charleston(COLUMN)39(COLUMN)63 Charleston(COLUMN)33(COLUMN)52 Charlotte(COLUMN)28(COLUMN)61 Cheyenne(COLUMN)13(COLUMN)40 Chicago(COLUMN)26(COLUMN)30 Cincinnati(COLUMN)33(COLUMN)43 Cleveland(COLUMN)31(COLUMN)40 Columbia(COLUMN)26(COLUMN)66 Columbus(COLUMN)31(COLUMN)42 Dal.-Ft. Worth(COLUMN)32(COLUMN)59 Dayton(COLUMN)29(COLUMN)40 Denver(COLUMN)17(COLUMN)38 Des Moines(COLUMN)24(COLUMN)33 Detroit(COLUMN)29(COLUMN)37 Duluth(COLUMN)12(COLUMN)24 El Paso(COLUMN)29(COLUMN)53 Evansville(COLUMN)35(COLUMN)43 Fairbanks(COLUMN)-13(COLUMN)00 Fargo(COLUMN)13(COLUMN)43 Flagstaff(COLUMN)13(COLUMN)43 Great Falls(COLUMN)19(COLUMN)31 Hartford(COLUMN)19(COLUMN)42 Helena(COLUMN)-01(COLUMN)17 Houston(COLUMN)49(COLUMN)62 Indianapolis(COLUMN)28(COLUMN)37 Jackson, Miss.(COLUMN)26(COLUMN)61 Jacksonville(COLUMN)33(COLUMN)66 Juneau(COLUMN)34(COLUMN)37 Kansas City(COLUMN)28(COLUMN)39 Las Vegas(COLUMN)33(COLUMN)63 Little Rock(COLUMN)45(COLUMN)55 Los Angeles(COLUMN)49(COLUMN)77 Louisville(COLUMN)38(COLUMN)46 Memphis(COLUMN)35(COLUMN)53 Miami Beach(COLUMN)59(COLUMN)74 Midland-Odessa(COLUMN)28(COLUMN)48 Milwaukee(COLUMN)23(COLUMN)30 Mpls.-St. Paul(COLUMN)18(COLUMN)28 Nashville(COLUMN)32(COLUMN)54 New Orleans(COLUMN)32(COLUMN)63 New York(COLUMN)34(COLUMN)50 Norfolk(COLUMN)28(COLUMN)58 North Platte(COLUMN)08(COLUMN)30 Oklahoma City(COLUMN)31(COLUMN)46 Omaha(COLUMN)20(COLUMN)34 Orlando(COLUMN)47(COLUMN)74 Philadelphia(COLUMN)26(COLUMN)52 Phoenix(COLUMN)41(COLUMN)75 Pittsburgh(COLUMN)30(COLUMN)43 Portland, Maine(COLUMN)11(COLUMN)37 Portland, Ore.(COLUMN)34(COLUMN)44 Providence(COLUMN)22(COLUMN)45 Raleigh(COLUMN)27(COLUMN)lo Rapid City(COLUMN)09(COLUMN)27 Reno(COLUMN)21(COLUMN)44 Richmond(COLUMN)27(COLUMN)61 St. Louis(COLUMN)29(COLUMN)38 St. Prbg.-Tampa(COLUMN)45(COLUMN)71 Salt Lake City(COLUMN)14(COLUMN)34 San Antonio(COLUMN)52(COLUMN)59 San diego(COLUMN)45(COLUMN)74 San Francisco(COLUMN)51(COLUMN)63 San Juan(COLUMN)74(COLUMN)86 St. Ste. Marie(COLUMN)20(COLUMN)33 Seattle(COLUMN)26(COLUMN)42 Shreveport(COLUMN)31(COLUMN)62 Sioux Falls(COLUMN)23(COLUMN)30 Spokane(COLUMN)00(COLUMN)20 Syracuse(COLUMN)34(COLUMN)41 Topeka(COLUMN)26(COLUMN)40 Tucson(COLUMN)45(COLUMN)67 Tulsa(COLUMN)30(COLUMN)46 Washington(COLUMN)31(COLUMN)60 Wichita(COLUMN)30(COLUMN)42(END TABLE)(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)Temp. Aberdeen(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)46 Amsterdam(COLUMN)rain(COLUMN)1 p.m.(COLUMN)46 Ankara(COLUMN)cloudy(COLUMN)3 p.m.(COLUMN)25 Athens(COLUMN)pt. cldy.(COLUMN)2 p.m.(COLUMN)63 Auckland(COLUMN)pt. cldy.(COLUMN)mid.(COLUMN)61 Berlin(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)48 Birmingham(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)46 Bonn(COLUMN)rain(COLUMN)1 p.m.(COLUMN)50 Brussels(COLUMN)rain(COLUMN)1 p.m.(COLUMN)45 Casablanca(COLUMN)cloudy(COLUMN)noon(COLUMN)68 Copenhagen(COLUMN)rain(COLUMN)1 p.m.(COLUMN)43 Dublin(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)45 Geneva(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)48 Hong kong(COLUMN)clear(COLUMN)8 p.m.(COLUMN)66 Jerusalem(COLUMN)pt. cldy.(COLUMN)2 p.m.(COLUMN)52 Lisbon(COLUMN)cloudy(COLUMN)noon(COLUMN)63 London(COLUMN)clear(COLUMN)1 p.m.(COLUMN)48 Madrid(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)59 Malta(COLUMN)clear(COLUMN)1 p.m.(COLUMN)68 Manila(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)79 Moscow(COLUMN)snow(COLUMN)3 p.m.(COLUMN)16 New Delhi(COLUMN)clear(COLUMN)5 p.m.(COLUMN)72 Nlce(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)61 Oslo(COLUMN)snow(COLUMN)1 p.m.(COLUMN)30 Paris(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)50 Peking(COLUMN)clear(COLUMN)8 p.m.(COLUMN)34 Rome(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)64 Saigon(COLUMN)pt. cldy.(COLUMN)8 p.m.(COLUMN)82 Sofia(COLUMN)pt. cldy.(COLUMN)2 p.m.(COLUMN)43 Stockholm(COLUMN)snow(COLUMN)1 p.m.(COLUMN)30 Sydney(COLUMN)pt. cldy.(COLUMN)10 p.m.(COLUMN)70 Tokyo(COLUMN)haze(COLUMN)9 p.m.(COLUMN)48 Tunis(COLUMN)clear(COLUMN)1 p.m.(COLUMN)73 Vienna(COLUMN)clear(COLUMN)1 p.m.(COLUMN)52 Warsaw(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)37(END TABLE)

Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)fair(COLUMN)90(COLUMN)73 Barbados(COLUMN)fiar(COLUMN)84(COLUMN)75 Bermuda(COLUMN)fair(COLUMN)72(COLUMN)64 Bogota(COLUMN)pt. cldy(COLUMN)67(COLUMN)50 Calgary(COLUMN)lcear(COLUMN)30(COLUMN)19 Cuiiacan(COLUMN)fair(COLUMN)90(COLUMN)61 Edmonton(COLUMN)cloudy(COLUMN)25(COLUMN)14 Havana(COLUMN)cloudy(COLUMN)77(COLUMN)69 Kingston(COLUMN)cloudy(COLUMN)88(COLUMN)73 Montego Bay(COLUMN)cloudy(COLUMN)84(COLUMN)72 Mexico City(COLUMN)haze(COLUMN)68(COLUMN)45 Monterrey(COLUMN)fair(COLUMN)61(COLUMN)45 Montreal(COLUMN)snow(COLUMN)30(COLUMN)25 Nassau(COLUMN)fair(COLUMN)85(COLUMN)72 Ottawa(COLUMN)cloudy(COLUMN)34(COLUMN)28 Regina(COLUMN)clear(COLUMN)25(COLUMN)3 St. Kitts(COLUMN)sunny(COLUMN)85(COLUMN)73 Toronto(COLUMN)pt. cldy(COLUMN)36(COLUMN)34 Vancouver(COLUMN)clear(COLUMN)43(COLUMN)25 Vera Cruz(COLUMN)pt. cldy(COLUMN)77(COLUMN)68 Winnipeg(COLUMN)snow(COLUMN)23(COLUMN)0(END TABLE)