Washington: Today - Rain, high in low 50s, low near 50. The chance of rain is 70 per cent through tonight. Thursday - Rain ending, high in low 60s.

Maryland and Virginia: Today - Rain, highs from the 50s to the low 60s lows from the 40s to the 50s. Thursday - Rain ending, highs from Thursday - Rain ending, highs from the 50s to the 60s.

Lower Potomac and Chesapeake Bay: Today - Rain with visibility of from one to two miles. Wind will be from the northeast at from 10 to 20 knots today, shifting to the south tonight.

Extended Area Forecast for Friday through Sunday: Fair through the period, except for a chance of precipitation on Saturday on Sunday. Highs will be in from the 40s to the low 50s lows from the upper 20s tothe mid 30s. Normal Washington temperatures for the period are a high of 49 and a low of 32.

West Virgina: Today - Rain, highs in the 50s, lows from the mid 40s to near 50. Thursday - Rain, highs from the upper 40s to the mid 50s.

THE NATIONAL WEATHER FORECAST for today - Rain is likely over much of the East, reaching from the lower Mississippi Valley to the middle and nortern Atlantic Coast. Scattered thunderstorms will fall over the Southeast, while snow will fall in the northern Appalachians. Snow will be scattered over the northern plains and central and northern Rocky Mountain region. Clear to partly cloudy skies are expected over the southern plains, the northern plateau and the Southwest. Temperatures will be mild over the Southeast and warm over Florida and southern California. Seasonably cool readings are expected for the remainder of the nation.

Almanac Data for today - Sunrise 7:06 a.m., sets 4:47 p.m.: Moon rises 9:17 p.m., sets 10:32 p.m. Tides: High 10:44 a.m. and 11:01 p.m., low 5:30 a.m. and 5:29 p.m. High and low tides at the following locations can 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 Lookout (7).

The Council of Government Air Quality Index for yesterday showed the high reading in the Washington area during the 2 p.m. to 3 p.m. period was 13 for the pollutant, carbon monoxide. Index values between zero and 24 indicated 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 be good.

The National Weather Service forecasts the Potomac River stage at Little Falls should be near 4.2 feet today

Local Temp., Humidity(TABLE) Time(COLUMN)T.(COLUMN)H. 12 mid.(COLUMN)38(COLUMN)73 1 a.m.(COLUMN)40(COLUMN)70 2 a.m.(COLUMN)40(COLUMN)67 3 a.m.(COLUMN)40(COLUMN)67 4 a.m.(COLUMN)40(COLUMN)62 5 a.m.(COLUMN)39(COLUMN)65 6 a.m.(COLUMN)39(COLUMN)65 7 a.m.(COLUMN)38(COLUMN)67 8 a.m.(COLUMN)36(COLUMN)76 9 a.m.(COLUMN)36(COLUMN)79 10 a.m.(COLUMN)36(COLUMN)80 11 a.m.(COLUMN)37(COLUMN)82 12 noon(COLUMN)37(COLUMN)82 1 p.m.(COLUMN)37(COLUMN)82 2 p.m.(COLUMN)37(COLUMN)82 3 p.m.(COLUMN)37(COLUMN)85 4 p.m.(COLUMN)37(COLUMN)85 5 p.m.(COLUMN)37(COLUMN)85 6 p.m.(COLUMN)37(COLUMN)85 7 p.m.(COLUMN)37(COLUMN)85(END TABLE) Temperatures ending 8 a.m. (EST) yesterday:(TABLE) City(COLUMN)H.(COLUMN)L. Albany(COLUMN)39(COLUMN)29 Albuquerque(COLUMN)56(COLUMN)33 Amarillo(COLUMN)50(COLUMN)24 Anchorage(COLUMN)23(COLUMN)10 Asheville(COLUMN)46(COLUMN)45 Atlanta(COLUMN)51(COLUMN)47 Atlantic City(COLUMN)47(COLUMN)33 Austin(COLUMN)72(COLUMN)45 Baltimore(COLUMN)48(COLUMN)34 Billings(COLUMN)44(COLUMN)32 Birmingham(COLUMN)60(COLUMN)51 Bismarck(COLUMN)33(COLUMN) 5 Boise(COLUMN)49(COLUMN)43 Boston(COLUMN)42(COLUMN)36 Brownsville(COLUMN)84(COLUMN)74 Buffalo(COLUMN)32(COLUMN)28 Burlington(COLUMN)35(COLUMN)12 Casper(COLUMN)43(COLUMN)24 Charleston, S.C.(COLUMN)24(COLUMN)59 Charl'ton, W.Va.(COLUMN)42(COLUMN)33 Charlotte(COLUMN)47(COLUMN)45 Chevenne(COLUMN)42(COLUMN)19 Chicago(COLUMN)23(COLUMN)15 Cincinatti(COLUMN)32(COLUMN)26 Cleveland(COLUMN)34(COLUMN)16 Columbia, S.C.(COLUMN)73(COLUMN)45 Columbus(COLUMN)35(COLUMN)23 Dal.-Ft. Worth(COLUMN)52(COLUMN)40 Dayton(COLUMN)31(COLUMN)25 Denver(COLUMN)49(COLUMN)26 Des Moines(COLUMN)36(COLUMN)23 Detroit(COLUMN)27(COLUMN)17 Duluth(COLUMN)22(COLUMN)16 El Paso(COLUMN)72(COLUMN)44 Fairbanks(COLUMN)-6(COLUMN)-17 Fargo(COLUMN)23(COLUMN)12 Flagstaff(COLUMN)54(COLUMN)27 Great Falls(COLUMN)47(COLUMN)36 Hartford(COLUMN)41(COLUMN)24 Helena(COLUMN)47(COLUMN)32 Honolulu(COLUMN)86(COLUMN)72 Houston(COLUMN)80(COLUMN)70 Indianapolis(COLUMN)29(COLUMN)26 Jackson, Miss.(COLUMN)64(COLUMN)55 Jacksonville(COLUMN)76(COLUMN)57 Juneau(COLUMN)38(COLUMN)35 Kansas City(COLUMN)31(COLUMN)28 Las Vegas(COLUMN)73(COLUMN)48 Little Rock(COLUMN)43(COLUMN)32 Los Angeles(COLUMN)87(COLUMN)60 Louisville(COLUMN)36(COLUMN)33 Memphis(COLUMN)46(COLUMN)38 Miami Beach(COLUMN)77(COLUMN)77 Midland-Odessa(COLUMN)64(COLUMN)38 Milwaukee(COLUMN)22(COLUMN) 4 Mpls.-St. Paul(COLUMN)24(COLUMN)18 Nashville(COLUMN)42(COLUMN)35 New Orleans(COLUMN)80(COLUMN)69 New York(COLUMN)40(COLUMN)35 Norfolk(COLUMN)52(COLUMN)48 North Platte(COLUMN)46(COLUMN)16 Oklahoma City(COLUMN)43(COLUMN)33 Omaha(COLUMN)42(COLUMN)29 Orlando(COLUMN)82(COLUMN)61 Philadelphia(COLUMN)45(COLUMN)27 Phoenix(COLUMN)81(COLUMN)54 Pittsburgh(COLUMN)36(COLUMN)21 Portland, Maine(COLUMN)29(COLUMN)20 Portland, Ore.(COLUMN)55(COLUMN)47 Providence(COLUMN)45(COLUMN)30 Raleigh(COLUMN)50(COLUMN)44 Rapid City(COLUMN)45(COLUMN)25 Reno(COLUMN)58(COLUMN)26 Richmond(COLUMN)47(COLUMN)43 St. Louis(COLUMN)28(COLUMN)25 St. Prbd.-Tampa(COLUMN)79(COLUMN)60 Salt Lake City(COLUMN)45(COLUMN)35 San Antonio(COLUMN)73(COLUMN)48 San Diego(COLUMN)69(COLUMN)56 San Francisco(COLUMN)68(COLUMN)58 San Juan(COLUMN)88(COLUMN)76 St. Ste. Marie(COLUMN)26(COLUMN)16 Seattle(COLUMN)52(COLUMN)47 Shreveport(COLUMN)54(COLUMN)39 Sioux Falls(COLUMN)37(COLUMN)30 Spokane(COLUMN)44(COLUMN)40 Syracuse(COLUMN)34(COLUMN)32 Topeka(COLUMN)35(COLUMN)31 Tucson(COLUMN)76(COLUMN)42 Tulsa(COLUMN)43(COLUMN)34 Washington(COLUMN)49(COLUMN)36 Wichita(COLUMN)45(COLUMN)36(END TABLE) Temperatures Abroad Yesterday(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)Temp. Aberdeen(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)41 Amsterdam(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)36 Ankara(COLUMN)pt. cldy.(COLUMN)3 p.m.(COLUMN)45 Athens(COLUMN)cloudy(COLUMN)2 p.m.(COLUMN)63 Auckland(COLUMN)pt. cldy.(COLUMN)midnight(COLUMN)59 Berlin(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)36 Birmingham(COLUMN)clear(COLUMN)1 p.m.(COLUMN)37 Brussels(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)32 Casablanca(COLUMN)cloudy(COLUMN)noon(COLUMN)59 Copenhagen(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)37 Dublin(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)36 Geneva(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)32 Hong Kong(COLUMN)clear(COLUMN)8 p.m.(COLUMN)63 Lisbon(COLUMN)cloudy(COLUMN)noon(COLUMN)48 London(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)41 Midrid(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)45 Malta(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)68 Manila(COLUMN)clear(COLUMN)2 p.m.(COLUMN)81 Moscow(COLUMN)snow(COLUMN)3 p.m.(COLUMN)21 New Delhi(COLUMN)pt. cldy.(COLUMN)5 p.m.(COLUMN)77 Nice(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)52 Oslo(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)28 Paris(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)32 Peking(COLUMN)clear(COLUMN)8 p.m.(COLUMN)32 Rome(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)48 Saigon(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)81 Sofia(COLUMN)snow(COLUMN)2 p.m.(COLUMN)34 Stockholm(COLUMN)rain(COLUMN)1 p.m.(COLUMN)34 Sydney(COLUMN)cloudy(COLUMN)10 p.m.(COLUMN)70 Tel Aviv(COLUMN)pt. cldy.(COLUMN)2 p.m.(COLUMN)72 Tokyo(COLUMN)clear(COLUMN)9 p.m.(COLUMN)54 Tunis(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)61 Vienna(COLUMN)clear(COLUMN)1 p.m.(COLUMN)34 Warsaw(COLUMN)rain(COLUMN)1 p.m.(COLUMN)34(END TABLE) Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)pt. cldy.(COLUMN)87(COLUMN)73 Barbados(COLUMN)pt. cldy.(COLUMN)86(COLUMN)76 Bermuda(COLUMN)cloudy(COLUMN)73(COLUMN)67 Bogota(COLUMN)pt. cldy.(COLUMN)68(COLUMN)46 Calgary(COLUMN)clear(COLUMN)45(COLUMN)23 Edmonton(COLUMN)cloudy(COLUMN)32(COLUMN)27 Havana(COLUMN)pt. cldy.(COLUMN)82(COLUMN)76 Kingston(COLUMN)cloudy(COLUMN)92(COLUMN)76 Montego Bay(COLUMN)pt. cldy.(COLUMN)86(COLUMN)73 Mexico City(COLUMN)pt. cldy.(COLUMN)72(COLUMN)66 Monterrey(COLUMN)cloudy(COLUMN)84(COLUMN)61 Montreal(COLUMN)cloudy(COLUMN)18(COLUMN) 9 Nassau(COLUMN)pt. cldy.(COLUMN)81(COLUMN)73 Ottawa(COLUMN)cloudy(COLUMN)21(COLUMN) 5 Regina(COLUMN)cloudy(COLUMN)18(COLUMN) 9 St. Kitts(COLUMN)fair(COLUMN)84(COLUMN)73 Toronto(COLUMN)pt. cldy.(COLUMN)32(COLUMN)19 Vancouver(COLUMN)cloudy(COLUMN)48(COLUMN)41 Veracruz(COLUMN)pt. cldy.(COLUMN)84(COLUMN)64 Winnipeg(COLUMN)cloudy(COLUMN)16(COLUMN) 9(END TABLE)