Washington; Today - Sunny, high in low to mid 70s, low in mid to upper 40s. Chance of rain is near zero today, 10 per cent tonight. Wednesday - Mostly sunny, high in mid to upper 60s.

Maryland and Virginia: Today - Sunny, highs upper 60s to mid 70s, lows in 40s. Wednesday - Sunny, high near 70.

Lower Potomac and Chesapeake Bay: Today - Fair skies with visibility of 5 miles or more through tonight. Winds should be westerly at 10 knots or less today becoming southwesterly at 5 to 15 to 75 knots tonight

Extended Area Outlook: For Thursday through Saturday - Fair skies with highs in 60s and lows in 40s through the period. Washington's normal temperatures range for this time of year is from 56 to 36.

West Virginia: Today - Sunny, high in 70s, low in Wednesday - Partly cloudy, high in mid 50s to mid 60s.

The National Weather Forecast for Today - Rain will fall along the north and centrak Pacific Coast with scattered showers extending across the Pacific northwest into Montana, the central plateau and north and central California. Rain will also fall across portions of Maine. Elsewhere, fair or partly cloudy skies are forecast. It will be warmer across much of the upper Ohio River Valley and the lower Great Lakes region. Colder temperature will be experienced across the upper and middle Mississipi Valley and the Great Plains. Escahere little change in temperature is expected.

ALMANAC DATA FOR March 15, 1977. Sun rises 6.20 a.m. Sets 6.15 p.m.; moon rises 3.37 a.m. Sets 2.24 p.m. Tides: High 4.25 a.m. and 4.57 p.m., low 11.07 a.m. and 11.39 p.m. High and low tides at the following can be obtaining by subtracting the hours indicated from the tides above. Annapolis (31/2); Bloody Point Light-house (41/7); Deale Md. (41/2); Colonial Beach (6); Norfolk (11/2); Virginia Beach (1); Solomon's Island (51/2); Point Lookout (7).

The Council of Governments Air Quality Index for yesterday showed high reading in the Washington area during the 2 to 3 p.m. period was 15 for the potiential, photochemical oxidants index values between 0 and 24 indicate good air quality. When the index exceeds 100 the air becomes dangerous and persons with lungs, heart eye problems should restrict their activity. The forecast for today indicates the air quality 0 to 24.

The National Weather Service forecasts that the Potomac River same at Little Falls will rise to [WORD ILLEGIBLE] 75 feet today.

Washington data at 7 p.m. (EST) yesterday: Highest temperature since 7 a.m. yesterday, 42 degrees at 4.10 p.m. Lowest temperature since midnight, 49 degrees at 5.50 a.m. Excess temperature since March 1, 149 degrees. Deficiency of temperature since Jan. 1, 108 degrees. Record high temperature for today, 75 degrees in 1936. Record temperature for today, 19 degrees in 1932. Relative humidity: Maximum, 77 per cent at 6 a.m.; Minimum, 43 per cent at 4 p.m. 24 hour precipitation, trace. Deficiency of precipitation since March 1, 59 inches. Deficiency of precipitation since Jan. 1, 3.50 inches. Highest observed wind since 7 a.m. 20 miles per hour from the N.W. at 4 p.m. Peak gust since 7 a.m. , 18 miles per hour form the N.W. at 4.02 p.m. Local Temp. Humidity(TABLE) Time(COLUMN)T.(COLUMN)H. 12mid.(COLUMN)50(COLUMN)58 1a.m.(COLUMN)50(COLUMN)53 2a.m.(COLUMN)52(COLUMN)51 3a.m.(COLUMN)57(COLUMN)57 4a.m.(COLUMN)53(COLUMN)66 5a.m.(COLUMN)51(COLUMN)71 6a.m.(COLUMN)51(COLUMN)77 7a.m.(COLUMN)52(COLUMN)77 8a.m.(COLUMN)55(COLUMN)69 9a.m.(COLUMN)57(COLUMN)62 10a.m.(COLUMN)57(COLUMN)62 11a.m.(COLUMN)58(COLUMN)60 12noon(COLUMN)59(COLUMN)58 1 p.m.(COLUMN)59(COLUMN)55 2 p.m.(COLUMN)589(COLUMN)53 3 p.m.(COLUMN)60(COLUMN)52 4 p.m.(COLUMN)61(COLUMN)48 5 p.m.(COLUMN)61(COLUMN)49(END TABLE) Temperatures Abroad Yesterday(TABLE) City(COLUMN)Weather(COLUMN)Time Aberdeen(COLUMN)rain(COLUMN)1 p.m.(COLUMN)45 Amsterdam(COLUMN)pt.cldy(COLUMN)1 p.m.(COLUMN)52 Chicago(COLUMN)pt.cldy(COLUMN)3 p.m. Arbane(COLUMN)pt.cldy(COLUMN)2 p.m.(COLUMN)94 Archland(COLUMN) cloudy(COLUMN)midnight(COLUMN)59 Berlin(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)52 Birmingham(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)38 Brussels(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)38 --(COLUMN)clear(COLUMN)2 p.m.(COLUMN)75 --(COLUMN)clear(COLUMN)noon(COLUMN)64 --(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)47 --(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)46 Geneva(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)46 Hong Kong(COLUMN)clear(COLUMN)8 p.m.(COLUMN)70 Lisbon(COLUMN)pt.cldy(COLUMN)noon(COLUMN)59 London(COLUMN) cloudy(COLUMN)1 p.m.(COLUMN)58 Madrid(COLUMN)pt.cldy(COLUMN)1 p.m.(COLUMN)52 Malta(COLUMN)pt.cldy(COLUMN)1 p.m.(COLUMN)64 Manilla(COLUMN)pt.cldy(COLUMN)3 p.m.(COLUMN)77 Moscow(COLUMN) cloudy(COLUMN)3 p.m.(COLUMN)36 New Delhi(COLUMN)clear(COLUMN)5 p.m.(COLUMN)91 Nice(COLUMN) clear(COLUMN)1 p.m.(COLUMN)59 Osio(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)37 Paris(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)50 Peking(COLUMN) clear(COLUMN)8 p.m.(COLUMN)43 Rome(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)61 Salgan(COLUMN) clear(COLUMN)8 p.m.(COLUMN)81 Sofir(COLUMN)cloudy(COLUMN)2 p.m.(COLUMN)39 Stackhalm(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)34 Tel Aviv(COLUMN) clear(COLUMN)2 p.m.(COLUMN)72 Tokyo(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)54 Tumis(COLUMN)pt cloudy(COLUMN)1 p.m.(COLUMN)70 Vienna(COLUMN)pt cldy(COLUMN)1 p.m.(COLUMN)59 Warsaw(COLUMN)pt.cldy(COLUMN)1 p.m.(COLUMN)52(END TABLE)