Washington: Today - Partly cloudy, chance of thundershowers, high in the mid 90s, low in the mid 70s. The chance of rain is 50 per cent today and 20 per cent tonight. Monday - Partly cloudy, chance of thundershowers, high in the mid 90s.

Maryland and Virginia: Today - Partly cloudy, chance of thundershowers, highs in the 90s, lows from the upper 60s to the 70s. Monday - Partly cloudy, chance of thundershowers, highs in the 90s.

Lower Potomac and Cheseapeake Bay: Today - Chance of thundershowers, visibility more than 5 miles, except in rain. Wind will be from the southwest at from 5 to 10 knots. Waves in unprotected waters will be less than 1 foot.

Atlantic Ocean Beaches from Cape May to Delaware: Today and Monday - Partly sunny, chance of thunderstorms highs in the mid 90s. Water temperatures will be less than 1 foot.

Extended Area Forecast for Tuesday through Thursday: Partly cloudy and humid through the period. Highs will be from the upper 80s to the mid 90s, lows from the upper 60s to the mid 70s. There will be a chance of afternoon or evening showers on each day. Normal Washington temperatures for the period are a high of 88 to a low of 69.

The National Weather Service forecasts the Potomac River stage at Little Falls will be near 2.7 feet today.

Almanac Data today - Sun rises 6:14 a.m., sets 8:13 p.m.; moon sets 2:31 p.m. Tides: High 2:40 a.m. and 2:58 p.m., low 9:43 a.m. and 9:51 p.m. High and low tides at the following locations can be optained by subracting 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) Local Temp., Humidity(TABLE) Time(COLUMN)T.(COLUMN)H. 23 mid.(COLUMN)79(COLUMN)85 1 a.m.(COLUMN)78(COLUMN)91 2 a.m.(COLUMN)77(COLUMN)91 3 a.m.(COLUMN)76(COLUMN)94 4 a.m.(COLUMN)76(COLUMN)94 5 a.m.(COLUMN)75(COLUMN)94 6 a.m.(COLUMN)74(COLUMN)97 7 a.m.(COLUMN)74(COLUMN)97 8 a.m.(COLUMN)77(COLUMN)88 9 a.m.(COLUMN)80(COLUMN)79 10 a.m.(COLUMN)85(COLUMN)68 11 a.m.(COLUMN)88(COLUMN)61 12 noon(COLUMN)91(COLUMN)56 1 p.m.(COLUMN)90(COLUMN)58 2 p.m.(COLUMN)93(COLUMN)51 3 p.m.(COLUMN)93(COLUMN)51 4 p.m.(COLUMN)90(COLUMN)54 5 p.m.(COLUMN)81(COLUMN)74 6 p.m.(COLUMN)84(COLUMN)67(END TABLE) Temperatures ending 8 a.m. (EDT) Yesterday(TABLE) City(COLUMN)H.(COLUMN)L. Albany(COLUMN) 85(COLUMN) 65 Albuquerque(COLUMN) 96(COLUMN)71 Amarillo(COLUMN) 95(COLUMN) 73 Anchorage(COLUMN) 61(COLUMN)52 Asheville(COLUMN) 85(COLUMN) 64 Atlanta(COLUMN) 86(COLUMN) 70 Atlantic City(COLUMN) 83(COLUMN) 77 Austin(COLUMN) 96(COLUMN) 76 Baltimore(COLUMN) 98(COLUMN) 72 Billings(COLUMN) 69(COLUMN) 52 Birmingham(COLUMN) 91(COLUMN) 71 Bismarck(COLUMN) 77(COLUMN) 53 Boise(COLUMN) 91(COLUMN) 62 Boston(COLUMN) 93(COLUMN) 71 Brownsville(COLUMN) 98(COLUMN) 76 Buffalo(COLUMN) 80(COLUMN) 72 Burlington(COLUMN) 82(COLUMN) 68 Casper(COLUMN) 71(COLUMN) 54 Charleston, S.C.(COLUMN) 90(COLUMN) 78 Charleston, W.Va.(COLUMN) 88(COLUMN) 69 Charlotte(COLUMN) 94(COLUMN) 73 Cheyenne(COLUMN) 62(COLUMN) 55 Chicago(COLUMN) 82(COLUMN) 78 Cincinnati(COLUMN) 92(COLUMN) 72 Cleveland(COLUMN) 87(COLUMN) 70 Columbia, S.C.(COLUMN) 92(COLUMN) 69 Columbus(COLUMN) 90(COLUMN) 71 Dal. Ft. Worth(COLUMN) 97(COLUMN) 74 Dayton(COLUMN) 92(COLUMN) 76 Denver(COLUMN) 73(COLUMN) 60 Des Monies(COLUMN) 83(COLUMN) 65 Detroit(COLUMN) 91(COLUMN) 71 Duluth(COLUMN) 70(COLUMN) 48 El Paso(COLUMN)103(COLUMN) 68 Fairbanks(COLUMN) 73(COLUMN) 57 Fargo(COLUMN) 72(COLUMN) 52 Flagstaff(COLUMN) 86(COLUMN) 51 Great Falls(COLUMN) 71(COLUMN) 52 Hartford(COLUMN) 92(COLUMN) 68 Helena(COLUMN) 72(COLUMN) 52 Honolulu(COLUMN) 88(COLUMN) 78 Houston(COLUMN) 83(COLUMN) 77 Indianapolis(COLUMN) 91(COLUMN) 76 Jackson, Miss.(COLUMN) 92(COLUMN) 70 Jacksonville(COLUMN) 93(COLUMN) 71 Juneau(COLUMN) 76(COLUMN) 52 Kansas City(COLUMN) 85(COLUMN) 69 Las Vegas(COLUMN)109(COLUMN) 84 Little Rock(COLUMN) 88(COLUMN) 72 Los Angeles(COLUMN) 85(COLUMN) 66 Louisville(COLUMN) 90(COLUMN) 73 Memphis(COLUMN) 92(COLUMN) 75 Miami Beach(COLUMN) 85(COLUMN) 78 Midland-Odessa(COLUMN)100(COLUMN) 72 Milwaukee(COLUMN) 81(COLUMN) 65 Mpls.-St. Paul(COLUMN) 76(COLUMN) 48 Nashville(COLUMN) 97(COLUMN) 73 New Orleans(COLUMN) 91(COLUMN) 76 New York(COLUMN) 92(COLUMN) 74 Norfolk(COLUMN) 98(COLUMN) 78 North Platte(COLUMN) 67(COLUMN) 58 Oklahoma City(COLUMN) 95(COLUMN) 74 Omaha(COLUMN) 78(COLUMN) 60 Orlando(COLUMN) 92(COLUMN) 74 Philadelphia(COLUMN) 93(COLUMN) 73 Phoenix(COLUMN)113(COLUMN) 86 Pittsburgh(COLUMN) 82(COLUMN) 68 Portland, Maine(COLUMN) 84(COLUMN) 64 Portland, Ore.(COLUMN) 93(COLUMN) 62 Providence(COLUMN) 91(COLUMN) 71 Raleigh(COLUMN) 95(COLUMN) 71 Rapid City(COLUMN) 69(COLUMN) 56 Reno(COLUMN) 89(COLUMN) 50 Richmond(COLUMN) 99(COLUMN) 74 St. Louis(COLUMN) 91(COLUMN) 77 St. Prbg.-Tampa(COLUMN) 93(COLUMN) 76 Salt Lake City(COLUMN) 89(COLUMN) 65 San Antonio(COLUMN) 93(COLUMN) 74 San Diego(COLUMN) 78(COLUMN) 69 San Francisco(COLUMN) 61(COLUMN) 55 San Juan(COLUMN) 83(COLUMN) 76 St. Ste. Marie(COLUMN) 75(COLUMN) 45 Seattle(COLUMN) 89(COLUMN) 61 Shreveport(COLUMN) 86(COLUMN) 70 Sioux Falls(COLUMN) 77(COLUMN) 49 Spokane(COLUMN) 82(COLUMN) 59 Syracuse(COLUMN) 83(COLUMN) 68 Topeka(COLUMN) 88(COLUMN) 70 Tucson(COLUMN)105(COLUMN) 84 Tulsa(COLUMN) 96(COLUMN) 77 Washington(COLUMN) 95(COLUMN) 74 Wichita(COLUMN) 88(COLUMN) 72(END TABLE) Temperatures Abroad Yesterday(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)Temp. Aberdeen(COLUMN)pt. cldy(COLUMN) 1 p.m.(COLUMN)57 Amsterdam(COLUMN) cloudy(COLUMN) 1 p.m.(COLUMN)59 Ankara(COLUMN) clear(COLUMN) 3 p.m.(COLUMN)79 Athens(COLUMN) clear(COLUMN) 2 p.m.(COLUMN)88 Auckland(COLUMN) cloudy(COLUMN)midnight(COLUMN)45 Berlin(COLUMN) clear(COLUMN) 1 p.m.(COLUMN)70 Birmingham(COLUMN) cloudy(COLUMN) 1 p.m.(COLUMN)57 Brussels(COLUMN)pt. cldy(COLUMN) 1 p.m.(COLUMN)72 Cairo(COLUMN) clear(COLUMN) 2 p.m.(COLUMN)91 Casablanca(COLUMN) clear(COLUMN) noon(COLUMN)64 Copenhagen(COLUMN) clear(COLUMN) 1 p.m.(COLUMN)64 Dublin(COLUMN)pt. cldy(COLUMN) 1 p.m.(COLUMN)61 Geneva(COLUMN) clear(COLUMN) 1 p.m.(COLUMN)75 Hong Kong(COLUMN) clear(COLUMN) 8 p.m.(COLUMN)84 Lisbon(COLUMN) clear(COLUMN) noon(COLUMN)77 London(COLUMN) rain(COLUMN) 1 p.m.(COLUMN)57 Madrid(COLUMN) clear(COLUMN) 1 p.m.(COLUMN)84 Malta(COLUMN) clear(COLUMN) 1 p.m.(COLUMN)86 Manila(COLUMN)pt. cldy(COLUMN) 8 p.m.(COLUMN)84 Moscow(COLUMN)pt. cldy(COLUMN) 3 p.m.(COLUMN)79 New Delhi(COLUMN) cloudy(COLUMN) 5 p.m.(COLUMN)88 Nice(COLUMN) clear(COLUMN) 1 p.m.(COLUMN)77 Oslo(COLUMN) clear(COLUMN) 1 p.m.(COLUMN)64 Paris(COLUMN)pt. cldy(COLUMN) 1 p.m.(COLUMN)75 Peking(COLUMN) rain(COLUMN) 8 p.m.(COLUMN)79 Rome(COLUMN) clear(COLUMN) 1 p.m.(COLUMN)81 Saigon(COLUMN) cloudy(COLUMN) 8 p.m.(COLUMN)77 Sofia(COLUMN) cloudy(COLUMN) 2 p.m.(COLUMN)75 Stockholm(COLUMN) clear(COLUMN) 1 p.m.(COLUMN)68 Sydney(COLUMN) clear(COLUMN)10 p.m.(COLUMN)50 Tel Aviv(COLUMN) clear(COLUMN) 2 p.m.(COLUMN)86 Tokyo(COLUMN) cloudy(COLUMN) 9 p.m.(COLUMN)84 Tunis(COLUMN) clear(COLUMN) 1 p.m.(COLUMN)82 Vienna(COLUMN)pt. cldy(COLUMN) 1 p.m.(COLUMN)77 Warsaw(COLUMN)pt. cldy(COLUMN) 1 p.m.(COLUMN)73(END TABLE) Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN) clear(COLUMN)90(COLUMN)78 Barbados(COLUMN) cloudy(COLUMN)86(COLUMN)76 Bermuda(COLUMN)pt. cloudy(COLUMN)85(COLUMN)79 Bogota(COLUMN) cloudy(COLUMN)65(COLUMN)46 Calgary(COLUMN) cloudy(COLUMN)71(COLUMN)50 Culiacan(COLUMN)pt. cloudy(COLUMN)96(COLUMN)75 Edmonton(COLUMN) rain(COLUMN)72(COLUMN)48 Havana(COLUMN) cloudy(COLUMN)91(COLUMN)71 Kingston(COLUMN)pt. cloudy(COLUMN)90(COLUMN)77 Montego Bay(COLUMN)pt. cldy(COLUMN)90(COLUMN)77 Mexico City(COLUMN) haze(COLUMN)81(COLUMN)59 Monterrey(COLUMN)pt. cloudy(COLUMN)99(COLUMN)75 Montreal(COLUMN) cloudy(COLUMN)73(COLUMN)68 Nassau(COLUMN) cloudy(COLUMN)88(COLUMN)77 Ottawa(COLUMN) rain(COLUMN)73(COLUMN)64 Regina(COLUMN) cloudy(COLUMN)73(COLUMN)48 St. Kitts(COLUMN)pt. cloudy(COLUMN)89(COLUMN)78 St. Thomas(COLUMN)pt. cloudy(COLUMN)88(COLUMN)73 Toronto(COLUMN) cloudy(COLUMN)82(COLUMN)66 Vancouver(COLUMN) clear(COLUMN)84(COLUMN)61 Veracruz(COLUMN) cloudy(COLUMN)90(COLUMN)76 Winnipeg(COLUMN) clear(COLUMN)68(COLUMN)52(END TABLE)