Washington: Today -- Sunny, high near 70, low in the mid 30s. The chance of rain is near zero. Thursday -- Sunny, high near 60.

Maryland and Virginia: Today --Sunny, highs from the 60s to the 70s, lows from the upper 30s to the low 40s. Thursday -- Sunny, highs from the mid 40s to near 60.

Lower Potomac and Chesapeake Bay: Today -- Fair with visibility of more than 5 miles. Wind will be from the northwest at from 15 to 25 knots, with gusts. Waves in unprotected waters will average from 2 to 4 feet.

West Virginia: Today -- Partly cloudy, highs from the mid 50s to the low 60s, lows from the upper 20s to the low 30s. Thursday --Sunny, highs from the 50s to the low 60s.

Extended Area Forecast for Friday through Sunday: Fair through the period, except for a chance of rain on Saturday. Highs will be in the 50s, lows in the 30s. Normal Washington temperatures for the period are a high of 56 and a low of 36.

The National Weather Forecast for Today -- Widely scattered rainshowers will fall across the Pacific states, and possibly also along the western and central Gulf Coast. Rain will fall across northern Maine. Elsewhere, fair or partly cloudy skies are forecast. It will be cool from the northern Plains across the upper Mississippi Valley, the Great Lakes, the Ohio and Tennessee valleys, eastern Missouri, the lower Mississippi Valley and eastern Texas. Little temperature change is forecast for the rest of the nation.

Almanac data for today -- Sun rises 6:10 a.m., sets 6:16 p.m.; moon rises 4:16 a.m., sets 3:27 p.m. Tides: High 5:31 a.m. and 5:59 p.m., low 12:05 p.m. High and low tides at the following points can be obtained by subtracting the hours indicated from the tides above. Annapolis (3 1/4); Bloody Point Lighthouse (4 1/2); Deale, Mid. (4 1/2); Colonial Beach (6), Norfolk (1 1/2); Virginia Beach (1); Solomon's Island (6 1/2); Point Lookout (7).

The Council of Governments' Air Casualty Index for yesterday showed the high reading in the Washington area during the 2 p.m. to 3 p.m. period was 30 for the pollutest, photochemical oxidants. Index values between 25 and 4 indicate fair air quality. When the index exceeds 100 the air becomes hazardous and persons with lung, heart and eye problems should restrict their activity. The forecast for today indicates the air quality will improve.

The National Weather Service forecasts that the Potomac River stage at Little Falls will be near 6.5 feet.

Washington data at 7 p.m. (EST) yesterday: Highest temperature since 7 a.m. yesterday, 70 degrees at 4:10 p.m. Lowest temperature since midnight, 44 degrees at 5:25 a.m. Excess of temperature since March 1, 161 degrees. Deficiency of temperature since Jan. 1, 96 degrees. Record high temperature for today, 86 degrees in 1945. Record low temperature for today, 14 degrees in 1911. Relative humidity: Maximum, 83 per cent at 5:06 a.m.; Minimum, 44 per cent at 4 p.m. Deficiency of precipitation since March 1, .70 inches. Deficiency of precipitation since Jan. 1, 3.61 inches. Highest observed wind since 7 a.m. 13 miles per hour from the northwest at 10 a.m. Peak gust since 7 a.m., 18 miles per hour from the northwest at 9:45 a.m.

Local Temp., Humidity (TABLE) Time(COLUMN)T.(COLUMN)H. 12 mid.(COLUMN)55(COLUMN)59 1 a.m.(COLUMN)50(COLUMN)71 2 a.m.(COLUMN)51(COLUMN)69 3 a.m.(COLUMN)51(COLUMN)69 4 a.m.(COLUMN)51(COLUMN)69 5 a.m.(COLUMN)47(COLUMN)80 6 a.m.(COLUMN)45(COLUMN)83 7 a.m.(COLUMN)45(COLUMN)83 8 a.m.(COLUMN)50(COLUMN)80 9 a.m.(COLUMN)53(COLUMN)71 10 a.m.(COLUMN)58(COLUMN)60 11 a.m.(COLUMN)60(COLUMN)54 12 noon(COLUMN)61(COLUMN)52 1 p.m.(COLUMN)62(COLUMN)52 2 p.m.(COLUMN)65(COLUMN)45 3 p.m.(COLUMN)66(COLUMN)45 4 p.m.(COLUMN)67(COLUMN)44 5 p.m.(COLUMN)66(COLUMN)47 6 p.m.(COLUMN)62(COLUMN)63 7 p.m.(COLUMN)61(COLUMN)62(END TABLE)

Temperatures ending 8 a.m. (EST) yesterday: (TABLE) City(COLUMN)H.(COLUMN)L. Albany(COLUMN)49(COLUMN)39 Albuquerque(COLUMN)68(COLUMN)26 Amarillo(COLUMN)79(COLUMN)38 Anchorage(COLUMN)29(COLUMN)26 Asheville(COLUMN)71(COLUMN)35 Atlanta(COLUMN)75(COLUMN)44 Atlantic City(COLUMN)60(COLUMN)44 Austin(COLUMN)79(COLUMN)64 Baltimore(COLUMN)62(COLUMN)40 Billings(COLUMN)38(COLUMN)19 Birmingham(COLUMN)81(COLUMN)46 Bismarck(COLUMN)47(COLUMN)26 Boise(COLUMN)44(COLUMN)30 Boston(COLUMN)56(COLUMN)42 Brownsville(COLUMN)85(COLUMN)70 Buffalo(COLUMN)46(COLUMN)34 Burlington(COLUMN)47(COLUMN)34 Casper(COLUMN)38(COLUMN)15 Charleston, S.C.(COLUMN)78(COLUMN)56 Chareston, WVa.(COLUMN)62(COLUMN)33 Charlotte(COLUMN)74(COLUMN)43 Cheyenne(COLUMN)41(COLUMN)10 Chicago(COLUMN)63(COLUMN)48 Cincinnati(COLUMN)67(COLUMN)46 Cleveland(COLUMN)51(COLUMN)36 Columbia, S.C.(COLUMN)84(COLUMN)45 Columbus(COLUMN)55(COLUMN)38 Dal.-Ft. Warth(COLUMN)80(COLUMN)55 Dayton(COLUMN)64(COLUMN)41 Denver(COLUMN)55(COLUMN)23 Des Moines(COLUMN)75(COLUMN)46 Detroit(COLUMN)56(COLUMN)34 Duluth(COLUMN)43(COLUMN)37 El Paso(COLUMN)72(COLUMN)30 Fairbanks(COLUMN)29(COLUMN)2 Fargo(COLUMN)42(COLUMN)31 Flagstaff(COLUMN)43(COLUMN)10 Great Falls(COLUMN)36(COLUMN)21 Hartford(COLUMN)56(COLUMN)44 Helena(COLUMN)34(COLUMN)8 Honolulu(COLUMN)85(COLUMN)71 Houston(COLUMN)73(COLUMN)66 Indianapolis(COLUMN)71(COLUMN)46 Jackson, Miss.(COLUMN)81(COLUMN)62 Jacksonville(COLUMN)83(COLUMN)48 Juneau(COLUMN)44(COLUMN)25 Kansas City(COLUMN)75(COLUMN)49 Las Vegas(COLUMN)60(COLUMN)35 Little Rock(COLUMN)80(COLUMN)60 Los Angeles(COLUMN)63(COLUMN)42 Louisville(COLUMN)73(COLUMN)45 Memphis(COLUMN)79(COLUMN)61 Miami Beach(COLUMN)83(COLUMN)73 Midland-Odessa(COLUMN)83(COLUMN)38 Milwaukee(COLUMN)50(COLUMN)38 Mpls.-St. Paul(COLUMN)55(COLUMN)42 Nashville(COLUMN)77(COLUMN)46 New Orleans(COLUMN)77(COLUMN)46 New York(COLUMN)58(COLUMN)45 Norfolk(COLUMN)69(COLUMN)44 North Platte(COLUMN)49(COLUMN)29 Oklahoma City(COLUMN)82(COLUMN)50 Omaha(COLUMN)72(COLUMN)44 Orlando(COLUMN)83(COLUMN)55 Philadelphia(COLUMN)62(COLUMN)42 Phienix(COLUMN)68(COLUMN)43 Pittsburgh(COLUMN)50(COLUMN)33 Portland, Mo.(COLUMN)47(COLUMN)37 Portland, Ore.(COLUMN)46(COLUMN)35 Providence(COLUMN)55(COLUMN)42 Raleigh(COLUMN)72(COLUMN)41 Rapid City(COLUMN)52(COLUMN)23 Reno(COLUMN)43(COLUMN)31 Richmond 71(COLUMN)36 St. Louis(COLUMN)81(COLUMN)48 St. Prbg.-Tampa(COLUMN)83(COLUMN)58 Salt Lake City(COLUMN)40(COLUMN)21 San Antonio(COLUMN)80(COLUMN)65 San Diego(COLUMN)62(COLUMN)46 San Francisco(COLUMN)55(COLUMN)48 St. Ste. Marie(COLUMN)47(COLUMN)30 Seattle(COLUMN)45(COLUMN)41 Shreveport(COLUMN)85(COLUMN)65 Sloux Falls(COLUMN)54(COLUMN)39 Spokane(COLUMN)39(COLUMN)29 Syracuse(COLUMN)49(COLUMN)42 Tucson(COLUMN)65(COLUMN)38 Tulsa(COLUMN)85(COLUMN)61 Washington(COLUMN)62(COLUMN)44 Wichita(COLUMN)62(COLUMN)45(END TABLE)

Temperatures Abroad Yesterday (TABLE) City(COLUMN)Weather(COLUMN)Time Temp. Aberdeen(COLUMN)clear(COLUMN)1 p.m. 48 Amsterdam(COLUMN)cloudy(COLUMN)1 p.m. 52 Ankara(COLUMN)rain(COLUMN)3 p.m. 48 Athens(COLUMN)cloudy(COLUMN)2 p.m. 61 Auckland pt.(COLUMN)cldy(COLUMN)midnight 64 Berlin(COLUMN)rain(COLUMN)1 p.m. 45 Birmingham(COLUMN)cloudy(COLUMN)1 p.m. 48 Brussels(COLUMN)cloudy(COLUMN)1 p.m. 50 Cairo(COLUMN)clear(COLUMN)2 p.m. 70 Casablanca(COLUMN)clear(COLUMN)noon 81 Copenhagen(COLUMN)cloudy(COLUMN)1 p.m. 45 Dublin(COLUMN)rain(COLUMN)1 p.m. 46 Geneva(COLUMN)cloudy(COLUMN)1 p.m. 46 Hong Kong(COLUMN)clear(COLUMN)8 p.m. 72 Lisbon(COLUMN)clear(COLUMN)noon 64 London(COLUMN)cloudy(COLUMN)1 p.m. 50 Madrid(COLUMN)pt. cldy(COLUMN)1 p.m. 50 Malta(COLUMN)pt. cldy(COLUMN)1 p.m. 63 Manila(COLUMN)clear(COLUMN)8 p.m. 79 Moscow(COLUMN)cloudy(COLUMN)3 p.m. 34 New Delhi(COLUMN)clear(COLUMN)5 p.m. 93 Nice(COLUMN)clear(COLUMN)1 p.m. 59 Oslo(COLUMN)cloudy(COLUMN)1 p.m. 39 Paris(COLUMN)cloudy(COLUMN)1 p.m. 54 Peking(COLUMN)clhaze(COLUMN)8 p.m. 50 Rome(COLUMN)clear(COLUMN)1 p.m. 63 Saigon(COLUMN)clear(COLUMN)8 p.m. 81 Sofia(COLUMN)rain(COLUMN)2 p.m. 43 Stockholm(COLUMN)cloudy(COLUMN)1 p.m. 37 Sydney(COLUMN)cloudy(COLUMN)10 p.m. 73 Tel Aviv(COLUMN)clear(COLUMN)8 p.m. 68 Tokyo(COLUMN)clear(COLUMN)9 p.m. 57 Tunnis(COLUMN)clear(COLUMN)1 p.m. 70 Vienna(COLUMN)pt. cldy(COLUMN)1 p.m. 54 Warsaw(COLUMN)pt. cldy(COLUMN)1 p.m. 50(END TABLE)

Temperatures (Western Hemisphere) (TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)pt. cldy(COLUMN)86(COLUMN)71 Barbados(COLUMN)pt. cldy(COLUMN)85(COLUMN)77 Bermuda(COLUMN)clear(COLUMN)71(COLUMN)63 Bogota(COLUMN)pt. cldy(COLUMN)68(COLUMN)47 Calgary(COLUMN)cloudy(COLUMN)34(COLUMN)10 Cullacan(COLUMN)pt. cldy(COLUMN)86(COLUMN)50 Edmonton(COLUMN)snow(COLUMN)28(COLUMN)18 Havana(COLUMN)clear(COLUMN)82(COLUMN)70 Kingston(COLUMN)clear(COLUMN)86(COLUMN)73 Maniago Bay(COLUMN)clear(COLUMN)86(COLUMN)71 Mexico City(COLUMN)cloudy(COLUMN)82(COLUMN)54 Monterrey(COLUMN)cloudy(COLUMN)87(COLUMN)55 Montreal(COLUMN)cloudy(COLUMN)37(COLUMN)34 Nassau(COLUMN)clear(COLUMN)82(COLUMN)68 Ottawa(COLUMN)rain(COLUMN)43(COLUMN)37 Regina(COLUMN)snow(COLUMN)32(COLUMN)21 St. Kitts(COLUMN)clear(COLUMN)86(COLUMN)49 Toronto(COLUMN)clear(COLUMN)54(COLUMN)34 Vancouver(COLUMN)rain(COLUMN)45(COLUMN)37 Veracruz(COLUMN)haze(COLUMN)85(COLUMN)48 Winnipes(COLUMN)cloudy(COLUMN)46(COLUMN)32(END TABLE)