Washington: Today - Variably cloudy, high near 70, low near 50. The chance of rain is 10 percent today and 30 percent tonight. Wind will be variable at from 5 to 10 mph today, becoming southerly tonight. Tuesday - Chance of rain, high in the 70s.

Maryland and Virginia: Today - Variably cloudy, highs from the low 60s to near 70, lows near 50. There is a chance of rain in northern and western Virginia. Tuesday - Variably cloudy, highs from the low 70s to near 80.

Lower potomic and Chesapeak Bay: Today - Increasingly cloudy, chance of rain north of Windmill Point. Visibility will be more than 5 miles except lower in rain. Wind will be from the Southeast at from 10 to 15 knots tonight. Waves in unprotected waters will be from 1 to 2 feet.

West Virginia: Today - Partly cloudy, chance of rain, highs from the mid 60s to the 70s, lows from the 40s to the mid 50s. Tuesday - Rain, highs in the 70s.

Extended Area Forecast for Tuesday through Thursday: Chance of showers on Wednesday and on Friday, fair on Thursday. Highs will be from the mid 60s to the mid 70s, lows from the mid 40s to the mid 50s. Normal Washington temperatures for the period are a high of 66 and a low of 45.

The National Weather Forecast for today - Showers and thunderstorms will extend from the eastern Great Plains through the Mississippi, Ohio, and Tennessee valleys. There is a chance of showers from the Carolinas to eastern Pennsylvania, in western portions of the central and southern Plains, and in parts of the southern Rockies. It will be mostly sunny from the Pacific to the southern Plateau and northern and central Rockies as well as over most of Florida. Temperaturs will be mild from the northern Pacific Coast to the northern Rockies, and from the lower and Middle Mississippi Valley through the Ohio and Tennessee Valleys to the southern Atlantic Coast. The remainder of the nation will be cool.

Almanac Data for today: Sun rises 5:40 a.m., sets 6:40 p.m.; Moon rises 7:38 a.m., sets 9:48 p.m. Tides: high 4:18 a.m. and 4:49 p.m., low 9:57 a.m. and 10:20 p.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 Lighthouse (4 1/2); Deale, Md. (4 1/2); Colonial Beach (5 2/4); Norfolk (1); Virginia Beach (3/4); Solomons Island (6 1/4); Point Lookout (7).

The National Weather Service forecast the Potomac River state at Little Falls should be near 4.6 feet today.

Washington data at 7 p.m. (EST) yesterday: Highest temperature since 7 a.m. yesterday, 65 degrees at 3:40 p.m. Lowest temperature since midnight, 40 degrees at 5:45 a.m. Excess of temperature since Apr. 1, 50 degrees. Deficiency of temperature since Jan. 1, 213 degrees. Record high temperature for today, 89 degrees in 1922. Record low temperature for today, 29 degrees in 1914. Relative humidity: Maximum, 51 percent at 8 a.m. Minimum, 18 percent at 4 p.m. Deficiency of precipitation since Apr. 1, .74 inches.Excess of precipitation since Jan. 1, 2.86 inches. Highest observed wind since 7 a.m., 12 miles per hour from the northwest at 1 p.m. Peak gust since 7 a.m., 21 miles per hour from the northwest at 2:59 p.m. Local Temp., Humidity(TABLE) Time(COLUMN)T.(COLUMN)H. 12 midnight(COLUMN)55(COLUMN)29 1 a.m.(COLUMN)51(COLUMN)29 2 a.m.(COLUMN)48(COLUMN)34 3 a.m.(COLUMN)45(COLUMN)40 4 a.m.(COLUMN)43(COLUMN)45 5 a.m.(COLUMN)41(COLUMN)49 6 a.m.(COLUMN)40(COLUMN)51 7 a.m.(COLUMN)41(COLUMN)49 8 a.m.(COLUMN)41(COLUMN)51 9 a.m.(COLUMN)47(COLUMN)40 10 a.m.(COLUMN)49(COLUMN)39 11 a.m.(COLUMN)52(COLUMN)32 12 noon(COLUMN)55(COLUMN)29 1 p.m.(COLUMN)59(COLUMN)25 2 p.m.(COLUMN)62(COLUMN)20 3 p.m.(COLUMN)63(COLUMN)19 4 p.m.(COLUMN)64(COLUMN)18 5 p.m.(COLUMN)63(COLUMN)19 6 p.m.(COLUMN)62(COLUMN)21 7 p.m.(COLUMN)59(COLUMN)25(END TABLE) Temperatures ending 7 a.m. (EST) yesterday:(TABLE) City(COLUMN)H.(COLUMN)L. Albany(COLUMN)43(COLUMN)25 Amarillo(COLUMN)82(COLUMN)58 Anchorage(COLUMN)48(COLUMN)39 Asheville(COLUMN)82(COLUMN)42 Atlanta(COLUMN)85(COLUMN)57 Atlantic City(COLUMN)60(COLUMN)27 Austin(COLUMN)77(COLUMN)66 Baltimore(COLUMN)70(COLUMN)36 Billings(COLUMN)66(COLUMN)37 Birmingham(COLUMN)86(COLUMN)59 Bismarck(COLUMN)49(COLUMN)39 Boise(COLUMN)60(COLUMN)37 Boston(COLUMN)52(COLUMN)34 Brownsville(COLUMN)86(COLUMN)73 Buffalo(COLUMN)37(COLUMN)25 Burlington(COLUMN)35(COLUMN)23 Casper(COLUMN)70(COLUMN)35 Charleston, S.C.(COLUMN)77(COLUMN)63 Charleston, WVa.(COLUMN)72(COLUMN)45 Charlotte(COLUMN)84(COLUMN)56 Cheyenne(COLUMN)68(COLUMN)39 Chicago(COLUMN)45(COLUMN)37 Cincinnati(COLUMN)66(COLUMN)42 Cleveland(COLUMN)43(COLUMN)29 Columbia, S.C.(COLUMN)86(COLUMN)46 Columbus(COLUMN)59(COLUMN)34 Dal.-Ft. Worth(COLUMN)79(COLUMN)63 Dayton(COLUMN)63(COLUMN)37 Denver(COLUMN)72(COLUMN)48 Des Moines(COLUMN)61(COLUMN)50 Detroit(COLUMN)50(COLUMN)26 Duluth(COLUMN)37(COLUMN)30 El Paso(COLUMN)86(COLUMN)45 Fairbanks(COLUMN)38(COLUMN)30 Fargo(COLUMN)50(COLUMN)38 Flagstaff(COLUMN)35(COLUMN)14 Great Falls(COLUMN)62(COLUMN)31 Hartford(COLUMN)50(COLUMN)33 Helena(COLUMN)62(COLUMN)34 Honolulu(COLUMN)84(COLUMN)72 Houston(COLUMN)76(COLUMN)68 Indianapolis(COLUMN)68(COLUMN)47 Jackson, Miss.(COLUMN)85(COLUMN)59 Jacksonville(COLUMN)91(COLUMN)59 Juneau(COLUMN)44(COLUMN)36 Kansas City(COLUMN)83(COLUMN)62 Las Vegas(COLUMN)68(COLUMN)45 Little Rock(COLUMN)87(COLUMN)67 Los Angeles(COLUMN)62(COLUMN)47 Louisville(COLUMN)81(COLUMN)52 Memphis(COLUMN)86(COLUMN)69 Miami Beach(COLUMN)81(COLUMN)64 Midland-Odessa(COLUMN)87(COLUMN)61 Milwaukee(COLUMN)39(COLUMN)34 Mpls.-St. Paul(COLUMN)47(COLUMN)37 Nashville(COLUMN)87(COLUMN)57 New Orleans(COLUMN)84(COLUMN)64 New York(COLUMN)51(COLUMN)34 Norfolk(COLUMN)74(COLUMN)46 North Platte(COLUMN)74(COLUMN)54 Oklahoma City(COLUMN)79(COLUMN)63 Omaha(COLUMN)76(COLUMN)58 Philadelphia(COLUMN)60(COLUMN)30 Phoenix(COLUMN)65(COLUMN)44 Pittsburgh(COLUMN)55(COLUMN)29 Portland, Maine(COLUMN)47(COLUMN)29 Portland, Ore.(COLUMN)65(COLUMN)40 Povidence(COLUMN)48(COLUMN)30 Raleigh(COLUMN)83(COLUMN)53 Rapid City(COLUMN)52(COLUMN)35 Reno(COLUMN)56(COLUMN)32 Richomnd(COLUMN)82(COLUMN)42 St. Louis(COLUMN)80(COLUMN)59 St. Prbq.-Tampa(COLUMN)87(COLUMN)62 Salt Lake City(COLUMN)57(COLUMN)39 San Antonio(COLUMN)77(COLUMN)69 San Diego(COLUMN)63(COLUMN)52 San Francisco(COLUMN)72(COLUMN)56 San Juan(COLUMN)86(COLUMN)74 St. Ste. Marie(COLUMN)33(COLUMN)20 Seattle(COLUMN)59(COLUMN)43 Shreveport(COLUMN)83(COLUMN)59 Sioux Falls(COLUMN)57(COLUMN)45 Spokane(COLUMN)59(COLUMN)30 Syracuse(COLUMN)37(COLUMN)22 Topeka(COLUMN)83(COLUMN)62 Tucson(COLUMN)62(COLUMN)41 Tulsa(COLUMN)83(COLUMN)64 Washington(COLUMN)74(COLUMN)40 Wichita(COLUMN)80(COLUMN)63(END TABLE) Temperatures Abroad Yesterday(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)Temp. Aberdeen(COLUMN)rain(COLUMN)1 p.m.(COLUMN)46 Amsterdam(COLUMN)haze(COLUMN)1 p.m.(COLUMN)46 Ankara(COLUMN)cldy(COLUMN)3 p.m.(COLUMN)52 Athens(COLUMN)pt. cldy(COLUMN)2 p.m.(COLUMN)66 Auckland(COLUMN)clear(COLUMN)midnight(COLUMN)64 Berlin(COLUMN)clear(COLUMN)1 p.m.(COLUMN)54 Birmingham(COLUMN)cldy(COLUMN)1 p.m.(COLUMN)45 Brussels(COLUMN)clear(COLUMN)1 p.m.(COLUMN)45 Cairo(COLUMN)dust(COLUMN)1 p.m.(COLUMN)2 p.m. 84 Casablanca(COLUMN)pt. cldy(COLUMN)noon(COLUMN)61 Dublin(COLUMN)cldy(COLUMN)1 p.m.(COLUMN)48 Geneva(COLUMN)clear(COLUMN)1 p.m.(COLUMN)55 Hong Kong(COLUMN)cldy(COLUMN)8 p.m.(COLUMN)68 Lisbon(COLUMN)cldy(COLUMN)noon(COLUMN)59 London(COLUMN)cldy(COLUMN)1 p.m.(COLUMN)45 Madrid(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)57 Malta(COLUMN)rain(COLUMN)1 p.m.(COLUMN)59 Manila(COLUMN)clear(COLUMN)8 p.m.(COLUMN)84 Moscow(COLUMN)snow(COLUMN)3 p.m.(COLUMN)39 New Delhi(COLUMN)clear(COLUMN)5 p.m.(COLUMN)95 Nice(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)59 Oslo(COLUMN)cldy(COLUMN)1 p.m.(COLUMN)48 Paris(COLUMN)clear(COLUMN)1 p.m.(COLUMN)52 Peking(COLUMN)pt. cldy(COLUMN)8 p.m.(COLUMN)55 Rome(COLUMN)cldy(COLUMN)1 p.m.(COLUMN)54 Saigon(COLUMN)clear(COLUMN)8 p.m.(COLUMN)84 Sofia(COLUMN)cldy(COLUMN)2 p.m.(COLUMN)46 Stockholm(COLUMN)cldy(COLUMN)1 p.m.(COLUMN)45 Sydney(COLUMN)clear(COLUMN)10 p.m.(COLUMN)72 Tel Aviv(COLUMN)dust(COLUMN)2 p.m.(COLUMN)75 Tokyo(COLUMN)clear(COLUMN)9 p.m.(COLUMN)64 Tunis(COLUMN)cldy(COLUMN)1 p.m.(COLUMN)61 Vienna(COLUMN)clear(COLUMN)1 p.m.(COLUMN)50 Warsaw(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)46(END TABLE) Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)clear(COLUMN)90(COLUMN)77 Barbados(COLUMN)cloudy(COLUMN)84(COLUMN)73 Bermuda(COLUMN)fair(COLUMN)72(COLUMN)62 Bogota(COLUMN)pt. cldy(COLUMN)67(COLUMN)48 Calgary(COLUMN)pt. cldy(COLUMN)46(COLUMN)27 Culiacan(COLUMN)cloudy(COLUMN)86(COLUMN)66 Edmonton(COLUMN)clear(COLUMN)50(COLUMN)32 Havana(COLUMN)fair(COLUMN)81(COLUMN)66 Mexico City(COLUMN)clear(COLUMN)81(COLUMN)53 Kingston(COLUMN)clear(COLUMN)86(COLUMN)73 Montego Bay(COLUMN)clear(COLUMN)85(COLUMN)72 Monterrey(COLUMN)cloudy(COLUMN)86(COLUMN)68 Montreal(COLUMN)clear(COLUMN)36(COLUMN)19 Nassau(COLUMN)clear(COLUMN)81(COLUMN)59 Ottawa(COLUMN)clear(COLUMN)36(COLUMN)18 Regina(COLUMN)pt. cldy(COLUMN)46(COLUMN)36 St. Kitts(COLUMN)Pt. cldy(COLUMN)87(COLUMN)74 St. Thomas(COLUMN)fair(COLUMN)84(COLUMN)74 Toronto(COLUMN)clear(COLUMN)36(COLUMN)19 Vancouver(COLUMN)cloudy(COLUMN)54(COLUMN)43 Veracruz(COLUMN)cloudy(COLUMN)85(COLUMN)70 Winnipes(COLUMN)rain(COLUMN)39(COLUMN)34(END TABLE)