Washington: Today - Partly cloudy, high in the low 80s, low in the mid 50s. The chance of rain is 10 per cent today and 20 per cent tonight. Thursday - Partly cloudy, high in the low 80s.

Maryland and Virginia: Today - Partly cloudy, highs from the upper 70s to the mid 80s, lows from the low 50s to near 60. Thursday - Partly cloudy, highs from the upper 70s to the mid 80s.

West Virginia: Today - Partly cloudy, highs from the upper 70s to the mid 80s, lows from the upper 40s to near 60. Thursday - Partly cloudy, highs from the upper 70s to the mid 80s. There is a chance of afternoon or evening thundershowers on each day.

Lower Potomac and Chesapeake Bay: Today - Partly cloudy and hazy, chance of afternoon or evening thundershowers. Visibility will be fair. Wind will be from the south at less than 12 knots. Waves in unprotected waters will average near 2 feet.

Extended Area Forecast for Friday through Sunday: Partly cloudy, humid through the period. There is a chance of afternoon or evening thundershowers on Sunday. Highs will be near 80, lows in the 50s. Normal Washington temperatures for the period are a high of 70 and a low of 48.

The National Weather Forecast for today - Thunderstorms and showers will scatter across the nation from th western high Plains eastward to the Appalachians. The highest probability for rain will be in the southern and central plains and in a portion of the middle Mississippi Valley. Temperatures will be cool west of the Mississippi River, while warm to mild temperatures will prevail elsewhere.

Almanac Data for today - Sun rises 5:25 a.m., sets 6:50 p.m.; moon rises 6:46 a.m., sets 9:02 p.m. Tides: High 9:15 a.m. and 9:38 p.m., low 3:42 a.m. and 3:13 p.m. High and low tides at the following locations can be obtained by substracting the hours indicated from the tides above. Annapolis (3 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).

Washington data at 7 p.m. (EST) yesterday: Highest temperature since 7 a.m. yesterday, 82 degrees at 1:15 p.m. Lowest temperature since midnight, 58 degrees at 4:40 p.m. Excess of temperature since April 1, 76 degrees. Excess of temperature since Jan. 1, 57 degrees. Record high temperature for today, 94 degrees in 1941. Record low temperature for today, 28 degrees in 1904. Relative humidity: Maximum, 81 per cent at 4 p.m.; Minimum, 36 per cent at 2 p.m. Excess of precipitation since April 1, .55 inches. Excess of precipitation since Jan. 1, 4.62 inches. Highest observed wind since 7 a.m. 12 miles per hour from the east at 5 p.m. Peak gust since 7 a.m., 16 miles per hour from the east at 6 p.m. Local Temp., Humidity(TABLE) Time(COLUMN)T.(COLUMN)H. 12 mid.(COLUMN)65(COLUMN)68 1 a.m.(COLUMN)62(COLUMN)73 2 a.m.(COLUMN)61(COLUMN)70 3 a.m.(COLUMN)61(COLUMN)72 4 a.m.(COLUMN)60(COLUMN)81 5 a.m.(COLUMN)59(COLUMN)78 6 a.m.(COLUMN)59(COLUMN)75 7 a.m.(COLUMN)62(COLUMN)72 8 a.m.(COLUMN)66(COLUMN)65 9 a.m.(COLUMN)70(COLUMN)55 10 a.m.(COLUMN)74(COLUMN)50 11 a.m.(COLUMN)75(COLUMN)45 12 noon(COLUMN)79(COLUMN)39 1 p.m.(COLUMN)80(COLUMN)41 2 p.m.(COLUMN)82(COLUMN)38 3 p.m.(COLUMN)82(COLUMN)38 4 p.m.(COLUMN)82(COLUMN)38 5 p.m.(COLUMN)80(COLUMN)38 6 p.m.(COLUMN)76(COLUMN)43 7 p.m.(COLUMN)74(COLUMN)66(END TABLE) Temperatures ending 8 a.m. (EST) yesterday:(TABLE) City(COLUMN)H.(COLUMN)L. Albany(COLUMN)73(COLUMN)34 Albuquerque(COLUMN)79(COLUMN)54 Amarillo(COLUMN)68(COLUMN)53 Anchorage(COLUMN)64(COLUMN)37 Asheville(COLUMN)77(COLUMN)63 Atlanta(COLUMN)83(COLUMN)59 Atlantic City(COLUMN)61(COLUMN)50 Austin(COLUMN)79(COLUMN)66 Baltimore(COLUMN)80(COLUMN)53 Billings(COLUMN)48(COLUMN)30 Birmingham(COLUMN)84(COLUMN)62 Bismarck(COLUMN)59(COLUMN)40 Boise(COLUMN)43(COLUMN)32 Boston(COLUMN)65(COLUMN)47 Brownsville(COLUMN)82(COLUMN)73 Buffalo(COLUMN)67(COLUMN)53 Burlington(COLUMN)69(COLUMN)37 Casper(COLUMN)38(COLUMN)33 Charleston, SC(COLUMN)84(COLUMN)65 Charleston, WV(COLUMN)84(COLUMN)58 Charlotte(COLUMN)83(COLUMN)58 Cheyenne(COLUMN)44(COLUMN)34 Chicago(COLUMN)88(COLUMN)60 Cincinnati(COLUMN)83(COLUMN)60 Cleveland(COLUMN)76(COLUMN)56 Columbia, S.C.(COLUMN)89(COLUMN)61 Columbus(COLUMN)82(COLUMN)57 Dal.-Ft. Worth(COLUMN)78(COLUMN)65 Dayton(COLUMN)86(COLUMN)61 Denver(COLUMN)52(COLUMN)38 Des Molnes(COLUMN)83(COLUMN)61 Detroit(COLUMN)80(COLUMN)49 Duluth(COLUMN)63(COLUMN)39 El Paso(COLUMN)86(COLUMN)61 Fairbanks(COLUMN)64(COLUMN)21 Fargo(COLUMN)57(COLUMN)39 Flagstaff(COLUMN)68(COLUMN)36 Great Falls(COLUMN)55(COLUMN)29 Hartford(COLUMN)75(COLUMN)43 Helena(COLUMN)55(COLUMN)28 Honolulu(COLUMN)75(COLUMN)70 Houston(COLUMN)66(COLUMN)70 Indianapolis(COLUMN)87(COLUMN)62 Jackson, Miss.(COLUMN)81(COLUMN)66 Jacksonville(COLUMN)84(COLUMN)57 Juneau(COLUMN)40(COLUMN)36 Kansas City(COLUMN)68(COLUMN)58 Las Vegas(COLUMN)85(COLUMN)60 Little Rock(COLUMN)75(COLUMN)62 Los Angeles(COLUMN)70(COLUMN)57 Louisville(COLUMN)86(COLUMN)61 Memphis(COLUMN)78(COLUMN)61 Miami Beach(COLUMN)76(COLUMN)73 Midland-Odessa(COLUMN)77(COLUMN)57 Milwaukee(COLUMN)74(COLUMN)49 Mpls.-St. Paul(COLUMN)79(COLUMN)55 Nashville(COLUMN)84(COLUMN)61 New Orleans(COLUMN)82(COLUMN)71 New York(COLUMN)75(COLUMN)51 Norfolk(COLUMN)79(COLUMN)58 North Platte(COLUMN)56(COLUMN)66 Oklahoma City(COLUMN)72(COLUMN)52 Omaha(COLUMN)78(COLUMN)60 Orlando(COLUMN)86(COLUMN)59 Philadelphia(COLUMN)78(COLUMN)62 Phoenix(COLUMN)94(COLUMN)64 Pittsburgh(COLUMN)72(COLUMN)50 Portland, Maine(COLUMN)57(COLUMN)31 Portland, Ora(COLUMN)57(COLUMN)36 Providence(COLUMN)70(COLUMN)45 Raleigh(COLUMN)81(COLUMN)57 Rapid City(COLUMN)49(COLUMN)33 Reno(COLUMN)62(COLUMN)24 Richmond(COLUMN)82(COLUMN)54 St Louis(COLUMN)83(COLUMN)60 St. Prbg-T'mpa(COLUMN)86(COLUMN)65 Salt Lake City(COLUMN)82(COLUMN)29 San Antonio(COLUMN)80(COLUMN)69 San Diego(COLUMN)65(COLUMN)58 San Francisco(COLUMN)69(COLUMN)55 San Juan(COLUMN)91(COLUMN)73 St. Ste Marie(COLUMN)63(COLUMN)46 Seattle(COLUMN)55(COLUMN)63 Shrevaport(COLUMN)81(COLUMN)63 Sloux Falls(COLUMN)73(COLUMN)50 Spokane(COLUMN)51(COLUMN)25 Syracuse(COLUMN)72(COLUMN)43 Topeka(COLUMN)66(COLUMN)59 Tucson(COLUMN)87(COLUMN)63 Tulsa(COLUMN)73(COLUMN)62 Washington(COLUMN)49(COLUMN)53 Wichita(COLUMN)67(COLUMN)48(END TABLE) Temperatures Abroad Yesterday(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)Temp Averdeen(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)46 Amsterdam(COLUMN)rain(COLUMN)1 p.m.(COLUMN)41 Ankara(COLUMN)pt. cldy(COLUMN)3 p.m.(COLUMN)50 Athens(COLUMN)clear(COLUMN)2 p.m.(COLUMN)64 Auckland(COLUMN)cloudy(COLUMN)midnight(COLUMN)59 Berlin(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)46 Birmingham(COLUMN)rain(COLUMN)1 p.m.(COLUMN)43 Brussels(COLUMN)clear(COLUMN)1 p.m.(COLUMN)46 Cairo(COLUMN)clear(COLUMN)2 p.m.(COLUMN)79 Casablanca(COLUMN)clear(COLUMN)noon(COLUMN)66 Copenhagen(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)45 Dublin(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)52 Geneva(COLUMN)rain(COLUMN)1 p.m.(COLUMN)50 Hong Kong(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)72 Lisbon(COLUMN)clear(COLUMN)noon(COLUMN)66 London(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)50 Madrid(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)61 Malta(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)63 Manila(COLUMN)clear(COLUMN)8 p.m.(COLUMN)82 New Delhi(COLUMN)clear(COLUMN)5 p.m.(COLUMN)88 Nice(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)59 Oslo(COLUMN)clear(COLUMN)1 p.m.(COLUMN)48 Paris(COLUMN)clear(COLUMN)1 p.m.(COLUMN)52 Peking(COLUMN)clear(COLUMN)8 p.m.(COLUMN)86 Rome(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)61 Saigon(COLUMN)clear(COLUMN)8 p.m.(COLUMN)84 Safis(COLUMN)clear(COLUMN)2 p.m.(COLUMN)61 Stockholm(COLUMN)clear(COLUMN)1 p.m.(COLUMN)43 Sydney(COLUMN)pt. cldy(COLUMN)10 p.m.(COLUMN)64 Tel Aviv(COLUMN)clear(COLUMN)2 p.m.(COLUMN)70 Tokyo(COLUMN)clear(COLUMN)9 p.m.(COLUMN)55 Toms(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)70 Vienna(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)48 Watsaw(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)45(END TABLE) Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)H.(COLUMN)L. Acapulco(COLUMN)cloudy(COLUMN)36(COLUMN)72 Barbados(COLUMN)pt. sunny(COLUMN)84(COLUMN)79 Bermuda(COLUMN)pt. sunny(COLUMN)69(COLUMN)62 Bogota(COLUMN)pt. sunny(COLUMN)68(COLUMN)50 Havana(COLUMN)cloudy(COLUMN)84(COLUMN)72 Kingston(COLUMN)pt. sunny(COLUMN)90(COLUMN)73 Montego Bay(COLUMN)pt. sunny(COLUMN)86(COLUMN)72 Mexico City(COLUMN)cloudy(COLUMN)81(COLUMN)57 Monterret(COLUMN)cloudy(COLUMN)86(COLUMN)66 St. Thomas(COLUMN)pt. sunny(COLUMN)85(COLUMN)74 Veracruz(COLUMN)cloudy(COLUMN)90(COLUMN)76(END TABLE)