Washington: Today - Morning rain, followed by partial clearing, high in the 50s, low near 40. The chance of rain is 70 per cent today and 20 per cent tonight. Friday - Partly cloudy, high in the 50s.

Maryland and Virginia: Today - Occasional rain, followed by partial clearing, high in the 50s, low near 40. Friday - Partly cloudy, high in the 50s.

Extended Area Forecast for Saturday through Monday - Chance of rain Saturday and again Monday otherwise fair. Saturday temperatures will be seasonable with highs in the 50s. The remainder of the period will be cooler, highs in the 40s, lows in the 20s and 30s.

Lower Potomac and Chesapeake Bay - Occasional rain possibly into tonight. Winds will shift to the northwest by late afternoon at 10 to 15 knots. Waves will average [WORD ILLEGIBLE] feet. Visibility will be 1 to 3 miles diminishing to less than 1 mile in rain.

West Virginia: Today - Brief periods of light rain, high in the 50s, lows from the mid 30s to mid 40s. Friday - Sunny, highs will range from the mid 40s to lower 50s.

The National Weather Forecast for Today - Rain will fall over most of Washington state across Oregon into northern California and the central Plateau region. There will also be rain from the New England to Florida and through the lower Great Lakes and upper Ohio Valley across Tennessee to Alabama and southeastern Louisiana. Snow is likely from northeastern Washington state through the northern Rockies into the western Great Lakes area. Temperatures will be mostly mild from Arizona through Texas, over Florida, and from Georgia and Alabama northward into southern New England. Most of the remainder of the nation can expect cool to cold conditions.

Almanac Data for today - Sun Rises 7:00 a.m., sets 4:49 p.m.; moon rises 4:30 p.m., sets 5:48 a.m.; Tides: high 7:07 a.m. and 7:28 p.m., low 1:25 a. m. and 1:36 p.m. High and low tides at the following locations may be obtained by subtracting the hours indicated from the tides above. Annapolis (1 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 Lockout (7).

The Council of Governments' Air Quality Index for yesterday showed the high reading in the Washington area during the 3 p.m. period was for the pollutant, sulfur dioxide. 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 good.

The National Weather Service forecasts the Potomac River stage at Little Falls should rise from 3.6 feet to 3.8 feet today. Local Temp., Humidity(TABLE) Time(COLUMN)T.(COLUMN)H. 12 midnight(COLUMN)42(COLUMN)82 1 a.m.(COLUMN)42(COLUMN)87 2 a.m.(COLUMN)42(COLUMN)87 3 a.m.(COLUMN)42(COLUMN)87 4 a.m.(COLUMN)42(COLUMN)87 5 a.m.(COLUMN)42(COLUMN)87 6 a.m.(COLUMN)42(COLUMN)86 7 a.m.(COLUMN)43(COLUMN)86 8 a.m.(COLUMN)43(COLUMN)86 9 a.m.(COLUMN)45(COLUMN)83 10 a.m.(COLUMN)45(COLUMN)83 11 a.M.(COLUMN)42(COLUMN)83 12 noon(COLUMN)46(COLUMN)83 1 p.m.(COLUMN)46(COLUMN)83 2 p.m.(COLUMN)47(COLUMN)83 3 p.m.(COLUMN)47(COLUMN)83 4 p.m.(COLUMN)47(COLUMN)86 5 p.m.(COLUMN)47(COLUMN)86 6 p.m.(COLUMN)47(COLUMN)89 7 p.m.(COLUMN)47(COLUMN)89(END TABLE) Temperatures ending 8 a.m. (EST) yesterday:(TABLE) CITY(COLUMN)H.(COLUMN)L. Albany(COLUMN)45(COLUMN)34 Albucuerque(COLUMN)61(COLUMN)34 Amarillo(COLUMN)74(COLUMN)47 Anchorage(COLUMN)30(COLUMN)16 Asheville(COLUMN)58(COLUMN)53 Atlanta(COLUMN)62(COLUMN)57 Atlantic City(COLUMN)55(COLUMN)47 Austin(COLUMN)60(COLUMN)56 Baltimore(COLUMN)55(COLUMN)47 Billings(COLUMN)10(COLUMN)01 Birmingham(COLUMN)63(COLUMN)61 Bismarck(COLUMN)15(COLUMN)04 Boise(COLUMN)47(COLUMN)34 Boston(COLUMN)55(COLUMN)42 Brownsville(COLUMN)70(COLUMN)64 Buffalo(COLUMN)38(COLUMN)34 Burlington, Vt.(COLUMN)43(COLUMN)25 Casper(COLUMN)41(COLUMN)27 Charleston, S.C.(COLUMN)77(COLUMN)64 Charleston, W.V.(COLUMN)44(COLUMN)43 Charlotte(COLUMN)64(COLUMN)52 Cheyenne(COLUMN)48(COLUMN)32 Chicago(COLUMN)38(COLUMN)31 Cincinnati(COLUMN)39(COLUMN)37 Cleveland(COLUMN)40(COLUMN)36 Columbia, S.C.(COLUMN)75(COLUMN)51 Columbus(COLUMN)42(COLUMN)36 Dal. Ft. Worth(COLUMN)56(COLUMN)52 Dayton(COLUMN)37(COLUMN)35 Denver(COLUMN)59(COLUMN)30 Des Moines(COLUMN)42(COLUMN)35 Detroit(COLUMN)33(COLUMN)29 Duluth(COLUMN)21(COLUMN)21 El Paso(COLUMN)71(COLUMN)35 Fairbanks(COLUMN)02(COLUMN)B13 Fargo(COLUMN)21(COLUMN)04 Flagstaff(COLUMN)55(COLUMN)25 Great Falls(COLUMN)04(COLUMN)B09 Hartford(COLUMN)51(COLUMN)38 Helena(COLUMN)14(COLUMN)B01 Honolulu(COLUMN)83(COLUMN)70 Houston(COLUMN)63(COLUMN)60 Indianapolis(COLUMN)42(COLUMN)38 Jackson(COLUMN)56(COLUMN)54 Jacksonville(COLUMN)79(COLUMN)64 Juneau(COLUMN)24(COLUMN)10 Kansas City(COLUMN)45(COLUMN)35 Las Vegas(COLUMN)62(COLUMN)37 Little Rock(COLUMN)48(COLUMN)24 Los Angeles(COLUMN)66(COLUMN)50 Louisville(COLUMN)44(COLUMN)42 Memphis(COLUMN)51(COLUMN)50 Miami Beach(COLUMN)77(COLUMN)63 Midland(COLUMN)78(COLUMN)42 Milwaukee(COLUMN)37(COLUMN)33 Mpls. St. Paul(COLUMN)29(COLUMN)27 Nashville(COLUMN)47(COLUMN)46 New Orleans(COLUMN)67(COLUMN)62 New York(COLUMN)53(COLUMN)39 Norfolk(COLUMN)64(COLUMN)51 North Platte(COLUMN)38(COLUMN)19 Oklahoma City(COLUMN)57(COLUMN)39 Omaha(COLUMN)40(COLUMN)31 Orlando(COLUMN)95(COLUMN)68 Philadelphia(COLUMN)51(COLUMN)37 Phoenix(COLUMN)75H$49 Pittsburgh(COLUMN)41(COLUMN)38 Portland, Me.(COLUMN)47(COLUMN)28 Portland, Or.(COLUMN)33(COLUMN)51 Providence(COLUMN)55(COLUMN)40 Raleigh(COLUMN)70(COLUMN)42 Rapid City(COLUMN)30(COLUMN)15 Reno(COLUMN)54(COLUMN)39 Richmond(COLUMN)60(COLUMN)43 St. Louis(COLUMN)41(COLUMN)36 St. Prbg.-Tampa(COLUMN)82(COLUMN)70 Salt Lake City(COLUMN)58(COLUMN)39 San Antonio(COLUMN)62(COLUMN)59 San Diego(COLUMN)69(COLUMN)57 San Francisco(COLUMN)63(COLUMN)52 San Juan(COLUMN)81(COLUMN)73 St. Ste. Marie(COLUMN)30(COLUMN)21 Seattle(COLUMN)35(COLUMN)31 Shreveport(COLUMN)52(COLUMN)49 Sioux Falls(COLUMN)35(COLUMN)30 Spokane(COLUMN)23(COLUMN)15 Syracuse(COLUMN)40(COLUMN)34 Topeka(COLUMN)47(COLUMN)30 Tucsonn(COLUMN)76(COLUMN)46 Tulsa(COLUMN)54(COLUMN)48 Washington(COLUMN)57(COLUMN)42 Wichita(COLUMN)52(COLUMN)33(END TABLE) Temperatures Abroad Yesterday(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)Temp. Aberdeen(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)45 Amsterdam(COLUMN)rain(COLUMN) 1 p.m.(COLUMN)46 Ankara(COLUMN)pt. cldy(COLUMN) 3 p.m.(COLUMN)50 Athens(COLUMN)pt. cldy.(COLUMN)2 p.m.(COLUMN)63 Auckland(COLUMN)pt. cldy.(COLUMN)midnight(COLUMN)53 Berlin(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)41 Brussels(COLUMN)cldy.(COLUMN)7 p.m.(COLUMN)45 Casablanca(COLUMN)pt. cldy.(COLUMN)noon(COLUMN)57 Copenhagen(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)41 Dublin(COLUMN)rain(COLUMN)1 p.m.(COLUMN)41 Geneva(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)39 Hong Kong(COLUMN)clear(COLUMN)8 p.m.(COLUMN)66 Lisbon(COLUMN)clear(COLUMN)noon(COLUMN)52 London(COLUMN)cldy.(COLUMN)1 p.m.(COLUMN)46 Madrid(COLUMN)clear(COLUMN)1 p.m.(COLUMN)43 Malta(COLUMN)cldy.(COLUMN)1 p.m.(COLUMN)70 Manila(COLUMN)cldy.(COLUMN)8 p.m.(COLUMN)81 Moscow(COLUMN)rain(COLUMN)3 p.m.(COLUMN)43 New Delhi(COLUMN)clear(COLUMN)5 p.m.(COLUMN)77 Nice(COLUMN)clear(COLUMN)1 p.m.(COLUMN)54 Oslo(COLUMN)cldy.(COLUMN)1 p.m.(COLUMN)25 Paris(COLUMN)cldy.(COLUMN)1 p.m.(COLUMN)46 Peking(COLUMN)clear(COLUMN)8 p.m.(COLUMN)34 Rome(COLUMN)cldy.(COLUMN)7 p.m.(COLUMN)57 Saigon(COLUMN)pt. cldy.(COLUMN)8 p.m.(COLUMN)79 Sofia(COLUMN)cldy.(COLUMN)2 p.m.(COLUMN)57 Stockholm(COLUMN)cldy.(COLUMN)1 p.m.(COLUMN)30 Sydney(COLUMN)pt. cldy.(COLUMN)10 p.m.(COLUMN)66 Tel Aviv(COLUMN)clear(COLUMN)2 p.m.(COLUMN)75 Tokyo(COLUMN)clear(COLUMN)9 p.m.(COLUMN)50 Tunis(COLUMN)cldy.(COLUMN)1 p.m.(COLUMN)57 Vienna(COLUMN)pt. cdy.(COLUMN)1 p.m.(COLUMN)39 Warsaw(COLUMN)rain(COLUMN)1 p.m.(COLUMN)39(END TABLE)