Washington: Today - Partly cloudy, high in the upper 80s, low near 70. The chance of rain is 10 per cent through tonight. Thursday - partly cloudy, high in the mid 80s.

Maryland and Virginia: Today - Partly cloudy, highs from near 60 to the mid 80s, lows in the 60s.

Lower Potomac and Chesapeaks Bay: Today - Partly cloudy, visibility of more than 5 miles. Wind will be from the northeast at from 10 to 15 knots. Waves in unprotected waters will be near 1 foot.

Extended Area Forecast for Friday through Sunday: Partly cloudy through the period. There is a chance of showers on Friday and on Sunday. Highs will be from the mid 70s to the 80s. Lows will be in the 60s. Normal Washington temperatures for the period are a high of 82 and a low of 63.

West Virginia: Today - Partly cloudy, highs from the mid 70s to the low 80s, lows in the 60s. Thursday - Cloudy, chance of rain, highs from the mid 70s to the low 80s.

The National Weather Forecast for today - Showers and thunderstorms will scatter over the upper Great Lakes. There will be a chance of showers and thundershowers over the Lower Great Lakes and the upper Ohio, across central Appalachians and New England. Showers are also likely from the lower Mississippi valley through the south Atlantic Coast. The rest of the country will have mostly sunny skies. Mild weather will continue over the southern plains and along the portions of the northern border states from Montana eastward across the lower Great Lakes. Elsewhere, seasonably warm temperatures will be dominant.

ALMANAC DATA - Sun rises 6:42 a.m., sets 7:30 p.m.; moon rises 1:11 a.m., sets 3:40 p.m. Tides: High 3:37 a.m. and 4:06 p.m., low 10:51 a.m. and 11:03 p.m. High and low tides at the following locations can be obtained by subtracting the hours indicated rom 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); Solomonas Island (6 1/2); Point Lookout (7).

Pollen count: 15 Ragweed (note 7 or higher is considered undesirable).

The Council of Governments' Air Quality Index for yesterday showed the high reading in the Washington area during the 2 p.m. to 3 p.m. period was 105 for the pollutant, photochemical oxidants. When the index exceeds 100 the air is considered very unhealthy and individuals with lung, heart and eye ailments are urged to restrict their activity. The forecast for today indicates that the air quality will improve.

The National Weather Service forecasts the Potomac River stage atLittle Falls will be near 2.7 feet today Local Temp., Humidity(TABLE) Time(COLUMN)T.(COLUMN)H. 12 midnight(COLUMN)76(COLUMN)76 1 a.m.(COLUMN)75(COLUMN)79 2 a.m.(COLUMN)75(COLUMN)79 3 a.m.(COLUMN)74(COLUMN)85 4 a.m.(COLUMN)74(COLUMN)85 5 a.m.(COLUMN)73(COLUMN)88 6 a.m.(COLUMN)73(COLUMN)88 7 a.m.(COLUMN)72(COLUMN)88 8 a.m.(COLUMN)74(COLUMN)85 9 a.m.(COLUMN)77(COLUMN)79 10 a.m.(COLUMN)80(COLUMN)72 11 a.m.(COLUMN)82(COLUMN)67 12 noon(COLUMN)83(COLUMN)65 1 p.m.(COLUMN)85(COLUMN)61 2 p.m.(COLUMN)87(COLUMN)57 3 p.m.(COLUMN)89(COLUMN)54 4 p.m.(COLUMN)88(COLUMN)56 5 p.m.(COLUMN)88%H54 6 p.m.(COLUMN)88(COLUMN)54 7 p.m.(COLUMN)87(COLUMN)55(END TABLE) Temperatures ending 8 a.m. (EDT) Yesterday(TABLE) City(COLUMN)H.(COLUMN)L. Albany(COLUMN)77(COLUMN)58 Alouquerque(COLUMN)82(COLUMN)60 Amarillo(COLUMN)81(COLUMN)61 Anchorage(COLUMN)69(COLUMN)58 Asheville(COLUMN)82(COLUMN)64 Atlanta(COLUMN)85(COLUMN)69 Atlantic City(COLUMN)80(COLUMN)74 Billings(COLUMN)86(COLUMN)57 Beltimore(COLUMN)89(COLUMN)68 Austin(COLUMN)99(COLUMN)77 Birmingham(COLUMN)86(COLUMN)74 Bismarck(COLUMN)74(COLUMN)55 Bolse(COLUMN)89(COLUMN)63 Boston(COLUMN)80(COLUMN)70 Brownsville(COLUMN)99(COLUMN)77 Buffalo(COLUMN)76(COLUMN)61 Burlington(COLUMN)74(COLUMN)61 Casper(COLUMN)91(COLUMN)53 Charl-ton, WVa.(COLUMN)80(COLUMN)68 Charlotte(COLUMN)89(COLUMN)69 Cheyenne(COLUMN)87(COLUMN)55 Chicago(COLUMN)73(COLUMN)58 Cincinnati(COLUMN)86(COLUMN)70 Cleveland(COLUMN)81(COLUMN)63 Columbia, S.C.(COLUMN)86(COLUMN)68 Columbus(COLUMN)86(COLUMN)67 Dal.-Ft. Worth(COLUMN)88(COLUMN)70 Dayton(COLUMN)86(COLUMN)69 Denver(COLUMN)87(COLUMN)61 Des Moines(COLUMN)79(COLUMN)61 Detroit(COLUMN)86(COLUMN)60 Duluth(COLUMN)60(COLUMN)52 El Paso(COLUMN)89(COLUMN)62 Fairbanks(COLUMN)62(COLUMN)38 Fargo(COLUMN)79(COLUMN)57 Flagstaff(COLUMN)83(COLUMN)47 Great Falls(COLUMN)80(COLUMN)45 Hartford(COLUMN)82(COLUMN)65 Helena(COLUMN)86(COLUMN)51 Honolulu(COLUMN)88(COLUMN)76 Houston(COLUMN)93(COLUMN)80 Indianapolis(COLUMN)87(COLUMN)67 Jackson, Miss.(COLUMN)86(COLUMN)72 Jacksonville(COLUMN)90(COLUMN)70 Juneau(COLUMN)55(COLUMN)50 Kansas City(COLUMN)81(COLUMN)64 Las Vegas(COLUMN)109(COLUMN)76 Little Rock(COLUMN)87(COLUMN)69 Los Angeles(COLUMN)89(COLUMN)64 Louisville(COLUMN)88(COLUMN)73 Memphis(COLUMN)92(COLUMN)74 Miami Beach(COLUMN)86(COLUMN)81 Mideland-Odessa(COLUMN)92(COLUMN)70 Milwaukee(COLUMN)71(COLUMN)52 Mpls.-St. Paul(COLUMN)75(COLUMN)61 Nashville(COLUMN)91(COLUMN)72 New Orleans(COLUMN)83(COLUMN)76 New York(COLUMN)80(COLUMN)72 Norfolk(COLUMN)92(COLUMN)71 North Platte(COLUMN)86(COLUMN)55 Oklahoma City(COLUMN)81(COLUMN)71 Omaha(COLUMN)80(COLUMN)60 Orlando(COLUMN)90(COLUMN)73 Philadelphia(COLUMN)85(COLUMN)58 Phoenix(COLUMN)107(COLUMN)84 Pittsburgh(COLUMN)83(COLUMN)67 Portland, Maine(COLUMN)70(COLUMN)58 Portland, Ore.(COLUMN)74(COLUMN)54 Raleigh(COLUMN)88(COLUMN)66 Rapid City(COLUMN)91(COLUMN)59 Reno(COLUMN)95(COLUMN)48 Richmond(COLUMN)93(COLUMN)71 St. Louis(COLUMN)83(COLUMN)69 St. Prbg.-Tampa(COLUMN)90(COLUMN)76 Salt Lake(COLUMN)95(COLUMN)61 San Antonio(COLUMN)99(COLUMN)72 San Diego(COLUMN)78(COLUMN)70 San Francisco(COLUMN)70(COLUMN)55 St. Ste. Marie(COLUMN)58(COLUMN)48 Seattle(COLUMN)72(COLUMN)52 Shreveport(COLUMN)92(COLUMN)71 Sioux Falls(COLUMN)80(COLUMN)54 Spokane(COLUMN)73(COLUMN)46 Svracuse(COLUMN)75(COLUMN)59 Topeka(COLUMN)86(COLUMN)61 Tucson(COLUMN)97(COLUMN)69 Tulsa(COLUMN)76(COLUMN)69 Washington(COLUMN)87(COLUMN)72 Wichita(COLUMN)84(COLUMN)65(END TABLE) Temperatures Abroad Yesterday(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)Temp. Aberdeen(COLUMN)Cloudy(COLUMN)1 p.m.(COLUMN)50 Amsterdam(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)66 Ankara(COLUMN)pt. cldy(COLUMN)3 p.m.(COLUMN)81 Athens(COLUMN)pt. cldy(COLUMN)3 p.m.(COLUMN)82 Auckland(COLUMN)clear(COLUMN)midnight(COLUMN)45 Berlin(COLUMN)clear(COLUMN)1 p.m.(COLUMN)72 Birmingham(COLUMN)cldy(COLUMN)1 p.m.(COLUMN)66 Brussels(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)68 Cairo(COLUMN)pt. cldy(COLUMN)2 p.m.(COLUMN)90 Casablanca(COLUMN)clear(COLUMN)noon(COLUMN)73 Copenh'gn(COLUMN)pt. clody(COLUMN)1 p.m.(COLUMN)66 Dublin(COLUMN)rain(COLUMN)1 p.m.(COLUMN)66 Geneva(COLUMN)clear(COLUMN)1 p.m.(COLUMN)70 Hong Kong(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)81 Lisbon(COLUMN)clear(COLUMN)noon(COLUMN)82 London(COLUMN)clody(COLUMN)1 p.m.(COLUMN)66 Madrid(COLUMN)clear(COLUMN)1 p.m.(COLUMN)86 Manila(COLUMN)pt. cldy(COLUMN)8 p.m.(COLUMN)82 Moscow(COLUMN)pt. cldy(COLUMN)3 p.m.(COLUMN)81 New Delhi(COLUMN)pt. cldy(COLUMN)2 p.m.(COLUMN)86 Nice(COLUMN)clear(COLUMN)1 p.m.(COLUMN)81 Oslo(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)61 Paris(COLUMN)clear(COLUMN)1 p.m.(COLUMN)75 Peking(COLUMN)clear(COLUMN)8 p.m.(COLUMN)68 Rome(COLUMN)clear(COLUMN)1 p.m.(COLUMN)84 Saigon(COLUMN)pt. cldy(COLUMN)8 p.m.(COLUMN)82 Sofia(COLUMN)rain(COLUMN)2 p.m.(COLUMN)75 Stockholm(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)63 Sydney(COLUMN)pt. cldy(COLUMN)10 p.m.(COLUMN)55 Tel Aviv(COLUMN)clear(COLUMN)2 p.m.(COLUMN)88 Tokyo(COLUMN)clear(COLUMN)9 p.m.(COLUMN)81 Vienna(COLUMN)clear(COLUMN)1 p.m.(COLUMN)75 Warsaw(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)70(END TABLE) Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)clear(COLUMN)81(COLUMN)78 Barbacos(COLUMN)pt. cldy.(COLUMN)86(COLUMN)71 Bermuda(COLUMN)pt. cldy.(COLUMN)86(COLUMN)77 Calgary(COLUMN)fog(COLUMN)63(COLUMN)39 Cullacan(COLUMN)pt. cldy.(COLUMN)95(COLUMN)80 Edmonton(COLUMN)pt. cldy.(COLUMN)61(COLUMN)37 Havana(COLUMN)pt. cldy.(COLUMN)88(COLUMN)74 Kingston(COLUMN)pt. cldy.(COLUMN)90(COLUMN)80 Montego Bay(COLUMN)pt. cldy.(COLUMN)88(COLUMN)77 Mexico City(COLUMN)pt. cldy.(COLUMN)79(COLUMN)58 Monterrey(COLUMN)pt. cldy.(COLUMN)97(COLUMN)71 Montreal(COLUMN)clear(COLUMN)64(COLUMN)52 Nassau(COLUMN)pt. cldy.(COLUMN)90(COLUMN)81 Ottawa(COLUMN)cloudy(COLUMN)70(COLUMN)54 Regina(COLUMN)cloudy(COLUMN)61(COLUMN)52 St. Kitts(COLUMN)cloudy(COLUMN)86(COLUMN)75 St. Thomas(COLUMN)cloudy(COLUMN)91(COLUMN)74 Toronto(COLUMN)clear(COLUMN)79(COLUMN)50 Vamcpiver(COLUMN)pt. cldy.(COLUMN)66(COLUMN)50 Veracruz(COLUMN)pt. cldy.(COLUMN)91(COLUMN)75 Winnipeg(COLUMN)cloudy(COLUMN)55(COLUMN)48(END TABLE)