Washington: Today -- Partly cloudy and windy, with a chance of snow flurries, high near 40, low in the low 20s. Friday -- Mostly cloudy, high near 40, low 20 to 25.

Maryland and Virginia: Today -- Partly cloudy and windy, with a chance of snow flurries, highs from the high 20s to the low 40s, lows from the teens to the mid 20s. Friday -- Mostly cloudy, highs from the 30s around 40.

West Virginia: Today -- Snow flurries and windy, highs from the mid 20s to the mid 30s, lows from the teens to near 20. Friday -- Partly cloudy, highs from the mid 20s to the mid 30s.

Extended Area Forecast for Saturday through Monday -- Cold, with a chance of precipitation each day, highs from the low 30s to the low 40s, lows from the teens to the mid 20s.

Lower Potomac and Chesapeake Bay -- Mostly cloudy, with fair or good visibility. Winds will be from the northwest at 20 to 30 knots today, diminishing somewhat tonight. Waves will be 3 to 5 feet.

The Council of Governments' Air Quality Index for yesterday showed the high reading in the Washington area during the 3 p.m. period was 23 for the pollutant, photochemical oxidents. 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 continue to be good.

The Nation Yesterday: An intense low pressure system in northern Virginia spread precipitation from the Ohio Valley and Great Lakes region to the middle Atlantic Coast. Snow fell over much of the western two thirds of this area, with rain prevailing from portions of eastern Ohio across parts of New York, Pennsylvania, Delaware, southern New England. Thundershowers raged from the extreme upper Ohio Valley to the East Coast from Virginia through New Jersey. The low pressure system continues to move eastward, and should be off the New Jersey Coast today. Heavy rain will cause flooding problems from Pennsylvania through southern New England. National temperatures extremes ranged from a frigid 33 delow in International Falls, Minnesota, to a balmy 78 degrees in Miami, Florida.

The National Weather Forecast for today: Snow will fall from the northern Rockies and Montana into much of the southwestern United States from Arizona to west Texas, with rain likely in the extreme southern portions of this area. Snow will also fall from eastern Michigan and the upper Ohio Valley through New England. Eastern Virginia, Maryland, New Jersey, and eastern Pennsylvania can expect rain. Skies will be sunny to mostly sunny elsewhere. Most of the nation can expect cold weather.

Washington data for yesterday: Highest temperature since midnight yesterday, 59 degress at 3:55 p.m. Lowest temperature since midnight, 37 degrees at 12:01 a.m. Deficency of temperature since Jan. 1, 17 degrees.Record high temperature for today, 75 degrees in 1950. Record low temperature for today, degrees in 1935. Relative humidity: p.m. 24 hour precipitation,.75 inches. Excess of precipitation since Jan. 1, 4.19 inches. Highest observed wind since 7 a.m., 26 miles per hour from the Southeast at 10:52 a.m. Peak qust since 7 a.m., 39 miles per hour from the Southeast at 11:15 a.m.

Almanac Data for today: The sun rises 7:20 a.m., sets 5:21 p.m. The moon rises 4:31 a.m., sets 2:50 p.m. Tides: High 4:48 a.m. and 5:02 p.m., low 11:37 a.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 Light-house (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).

Local Temp., Humidity (TABLE) Time(COLUMN)T.(COLUMN)H. 12 midnite(COLUMN)38(COLUMN)73 1 a.m.(COLUMN)37(COLUMN)76 2 a.m.(COLUMN)38(COLUMN)82 3 a.m.(COLUMN)40(COLUMN)82 4 a.m.(COLUMN)40(COLUMN)86 5 a.m.(COLUMN)40(COLUMN)93 6 a.m.(COLUMN)43(COLUMN)93 7 a.m.(COLUMN)48(COLUMN)93 8 a.m.(COLUMN)50(COLUMN)93 9 a.m.(COLUMN)55(COLUMN)93 10 a.m.(COLUMN)55(COLUMN)93 11 a.m.(COLUMN)56(COLUMN)93 12 noon(COLUMN)56(COLUMN)96 1 p.m.(COLUMN)57(COLUMN)93 2 p.m.(COLUMN)58(COLUMN)93 3 p.m.(COLUMN)57(COLUMN)93 4 p.m.(COLUMN)58(COLUMN)90 5 p.m.(COLUMN)55(COLUMN)86 6 p.m.(COLUMN)55(COLUMN)86 7 p.m.(COLUMN)52(COLUMN)93 8 p.m.(COLUMN)52(COLUMN)83 9 p.m.(COLUMN)48(COLUMN)74 10 p.m.(COLUMN)45(COLUMN)63 11 p.m.(COLUMN)43(COLUMN)58(END TABLE)

Temperatures ending 7 p.m. (EST) yesterday: (TABLE) City(COLUMN)L.(COLUMN)H. Albany(COLUMN)14(COLUMN)40 Albuuerque(COLUMN)15(COLUMN)40 Amarillo(COLUMN)11(COLUMN)46 Anchorage(COLUMN)17(COLUMN)24 Asheville(COLUMN)27(COLUMN)41 Atlanta(COLUMN)26(COLUMN)31 Atlantic City(COLUMN)37(COLUMN)48 Austin(COLUMN)24(COLUMN)48 Baltimore(COLUMN)30(COLUMN)57 Billings(COLUMN)15(COLUMN)30 Birmingham(COLUMN)28(COLUMN)32 Bismarck(COLUMN)-05(COLUMN)13 Boise(COLUMN)13(COLUMN)23 Boston(COLUMN)28(COLUMN)41 Brownsville(COLUMN)41(COLUMN)58 Buffalo(COLUMN)26(COLUMN)41 Burlington(COLUMN)19(COLUMN)35 Casper(COLUMN)12(COLUMN)28 Charleston, S.C.(COLUMN)37(COLUMN)60 Charleston, W.V.(COLUMN)27(COLUMN)45 Charlotte(COLUMN)32(COLUMN)51 Cheyenne(COLUMN)12(COLUMN)44 Chicago(COLUMN)16(COLUMN)23 Cincinnati(COLUMN)17(COLUMN)38 Cleveland(COLUMN)32(COLUMN)39 Columbia(COLUMN)36(COLUMN)60 Columbus(COLUMN)26(COLUMN)39 Dal.-Ft. Worth(COLUMN)25(COLUMN)45 Dayton(COLUMN)20(COLUMN)37 Denver(COLUMN)01(COLUMN)35 Des Moines(COLUMN)-04(COLUMN)11 Detroit(COLUMN)26(COLUMN)37 Duluth(COLUMN)-10(COLUMN)12 El Paso(COLUMN)27(COLUMN)46 Evansville(COLUMN)13(COLUMN)25 Fairbanks(COLUMN)-20(COLUMN)-07 Fargo(COLUMN)-20(COLUMN)-01 Flagstaff(COLUMN)00(COLUMN)32 Great Falls(COLUMN)25(COLUMN)29 Hartford(COLUMN)24(COLUMN)38 Helena(COLUMN)10(COLUMN)23 Houston(COLUMN)34(COLUMN)49 Indianapolis(COLUMN)18(COLUMN)34 Jackson, Miss.(COLUMN)26(COLUMN)38 Jacksonville(COLUMN)42(COLUMN)63 Juneau(COLUMN)29(COLUMN)34 ansas CiKty(COLUMN)01(COLUMN)19 Las Vegas(COLUMN)32(COLUMN)48 Little Rock(COLUMN)17(COLUMN)32 Los Angeles(COLUMN)53(COLUMN)66 Louisville(COLUMN)16(COLUMN)34 Memphis(COLUMN)21(COLUMN)30 Miami Beach(COLUMN)70(COLUMN)78 Midland-Odessa(COLUMN)18(COLUMN)51 Milwaukee(COLUMN)20(COLUMN)30 Mpls.-St. Paul(COLUMN)-08(COLUMN)09 Nashville(COLUMN)23(COLUMN)28 New Orleans(COLUMN)31(COLUMN)46 New York(COLUMN)33(COLUMN)50 Norfolk(COLUMN)49(COLUMN)67 North Platte(COLUMN)-04(COLUMN)29 Oklahoma City(COLUMN)10(COLUMN)40 Omaha(COLUMN)-08(COLUMN)14 Orlando(COLUMN)51(COLUMN)69 Philadelphia(COLUMN)35(COLUMN)55 Phoenix(COLUMN)40(COLUMN)57 Pittsburgh(COLUMN)31(COLUMN)38 Portland, Maine(COLUMN)10(COLUMN)30 Portland, Ore.(COLUMN)34(COLUMN)40 Providence(COLUMN)23(COLUMN)38 Raleigh(COLUMN)41(COLUMN)68 Rapid City(COLUMN)07(COLUMN)24 Reno(COLUMN)24(COLUMN)45 Richmond(COLUMN)41(COLUMN)65 St. Louis(COLUMN)06(COLUMN)18 St. Prbg.-Tampa(COLUMN)54(COLUMN)65 Salt Lake City(COLUMN)03(COLUMN)27 San Antonio(COLUMN)26(COLUMN)53 San Diego(COLUMN)56(COLUMN)61 San Francisco(COLUMN)46(COLUMN)55 San Juan(COLUMN)72(COLUMN)87 St. Ste. Marie(COLUMN)26(COLUMN)30 Seattle(COLUMN)37(COLUMN)44 Shreveport(COLUMN)23(COLUMN)44 Sioux Falls(COLUMN)-19(COLUMN)09 Spokane(COLUMN)20(COLUMN)25 Syracuse(COLUMN)24(COLUMN)40 Topeka(COLUMN)03(COLUMN)20 Tuscon(COLUMN)40(COLUMN)55 Tulsa(COLUMN)08(COLUMN)29 Washington(COLUMN)37(COLUMN)59 Wichita(COLUMN)07(COLUMN)29(END TABLE)

Temperatures Abroad Yesterday (TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)Temp. Aberdeen(COLUMN)rain(COLUMN)1 p.m.(COLUMN)37 Amsterdam(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)32 Ankara(COLUMN)cloudy(COLUMN)3 p.m.(COLUMN)34 Athens(COLUMN)rain(COLUMN)2 p.m.(COLUMN)55 Auckland(COLUMN)clear(COLUMN)12 a.m.(COLUMN)66 Berlin(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)32 Birmingham(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)32 Bonn(COLUMN)snow(COLUMN)1 p.m.(COLUMN)32 Brussels(COLUMN)snow(COLUMN)1 p.m.(COLUMN)32 Casablanca(COLUMN)cloudy(COLUMN)12 p.m.(COLUMN)61 Copenhagen(COLUMN)snow(COLUMN)1 p.m.(COLUMN)27 Dublin(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)36 Geneva(COLUMN)hail(COLUMN)1 p.m.(COLUMN)39 Hong Kong(COLUMN)clear(COLUMN)8 p.m.(COLUMN)64 Jerusalem(COLUMN)cloudy(COLUMN)2 p.m.(COLUMN)48 Lisbon(COLUMN)rain(COLUMN)12 p.m.(COLUMN)48 London(COLUMN)clear(COLUMN)1 p.m.(COLUMN)30 Madrid(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)46 Malta(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)59 Manila(COLUMN)clear(COLUMN)8 p.m.(COLUMN)75 Moscow(COLUMN)pt. cldy.(COLUMN)3 p.m.(COLUMN)1 New Delhi(COLUMN)pt. Cldy.(COLUMN)5 p.m.(COLUMN)72 Nice(COLUMN)pt. Cldy.(COLUMN)1 p.m.(COLUMN)52 Oslo(COLUMN)snow(COLUMN)1 p.m.(COLUMN)19 Paris(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)36 Peking(COLUMN)clear(COLUMN)8 p.m.(COLUMN)36 Rome(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)57 Saigon(COLUMN)clear(COLUMN)8 p.m.(COLUMN)84 Sofia(COLUMN)pt. cldy.(COLUMN)2 p.m.(COLUMN)41 Stockholm(COLUMN)snow(COLUMN)1 p.m.(COLUMN)23 Tokyo(COLUMN)clear(COLUMN)9 p.m.(COLUMN)46 Tunis(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)64 Vienna(COLUMN)rain(COLUMN)1 p.m.(COLUMN)34 Warsaw(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)32(END TABLE)

Temperatures (Western Hemisphere) (TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)fair(COLUMN)86(COLUMN)68 Barbados(COLUMN)pt. cldy.(COLUMN)85(COLUMN)75 Bermuda(COLUMN)cloudy(COLUMN)71(COLUMN)65 Bogota(COLUMN)pt. cldy.(COLUMN)72(COLUMN)50 Calgary(COLUMN)pt. cldy.(COLUMN)37(COLUMN)12 Culiacan(COLUMN)cloudy(COLUMN)73(COLUMN)57 Edmonton(COLUMN)clear(COLUMN)28(COLUMN)16 Havana(COLUMN)pt. cldy.(COLUMN)81(COLUMN)62 Kingston(COLUMN)fair(COLUMN)85(COLUMN)73 Montego Bay(COLUMN)pt. cldy.(COLUMN)83(COLUMN)69 Mexico City(COLUMN)cloudy(COLUMN)74(COLUMN)37 Monterrey(COLUMN)cloudy(COLUMN)74(COLUMN)42 Montreal(COLUMN)clear(COLUMN)21(COLUMN)9 Nassau(COLUMN)cloudy(COLUMN)76(COLUMN)68 Ottawa(COLUMN)clear(COLUMN)23(COLUMN)12 Regina(COLUMN)cloudy(COLUMN)1(COLUMN)-2 St. Kitts(COLUMN)fair(COLUMN)85(COLUMN)71 Toronto(COLUMN)cloudy(COLUMN)30(COLUMN)21 Vancouver(COLUMN)fog(COLUMN)39(COLUMN)30 Veracruz(COLUMN)pt. cldy.(COLUMN)82(COLUMN)66 Winnipeg(COLUMN)snow(COLUMN)0(COLUMN)-18(END TABLE)