Washington: Today - Sunny, high near 90, low from the upper 50s to the mid 60s. The chance of rain is 10 per cent today. Thursday - Sunny, high in the mid 80s.

Maryland and Virginia: Today - Sunny, highs near 90, lows from the mid 50s to the mid 60s. Thursday - Sunny, highs near 90.

Lower Potomac and Chesapeake Bay: Today - Fair, with visibility of more than 5 miles. Wind will be from the southeast at less than 10 knots today, but variable at near 5 knots tonight. Waves in unprotected waters will be less than 3 feet.

West Virginia: Today - Partly cloudy, highs from the upper 70s to near 90, lows from the mid 50s to the mid 60s. Thursday - partly cloudy, highs from the 70s to near 90.

Extended Area Forecast for Friday through Sunday: Fair through the period. Highs will be near 90, lows in the 60s. Normal Washington temperatures for the period are a high of 78 and a low of 57.

The National Weather Forecast for today - Thunderstorms will scatter across most of the plains, while showers will extend from the Plains eastward along the north of Ohio Valley into New England. There will be a good chance of rain in the central and northern Rockies and along the northwestern Pacific Coast. Temperatures will be cool west of the divide, while there will be mild to warm readings elsewhere. Temperatures will be seasonably hot across most of the Great Lakes. Skies will be cloudy across North Dakota, the central and northern Rockies and the northwestern Pacific Coast. Skies will be partly cloudy to sunny, elsewhere.

Almanac Data for Today - Sun rises 5:30 a.m., sets 8:16 p.m.; moon rises 6:24 a.m., sets 8:49 p.m. Tides: High 9:13 a.m. and 9:39 p.m., low 3:34 a.m. and 4:08 p.m. High and low tides at the following locations can be obtained by subtracting the hours indicated from the tides above. Annapolis (13 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). Pollen count: 40 trees/32 grass (note: more than 7 or higher is considered undesirable).

The Council of Governments' Air Quality Index for yesterday showed the high reading in the Washington are during the 2 p.m. to 3 p.m. period was 130 for the pollutant, photochemical oxidants. When the index exceeds 100 the air becomes hazardous and persons with lung, heart and eye problems should restrict their activity. The forecast for today indicates the air quality will improve.

The National Weather Service forecast that the Potamac River stage at Little Falls will be near 3.3 feet. Local Temp., Humidity(TABLE) Time(COLUMN)T.(COLUMN)H. 12 mid.(COLUMN)65(COLUMN)70 1 a.m.(COLUMN)64(COLUMN)70 2 a.m.(COLUMN)63(COLUMN)70 3 a.m.(COLUMN)61(COLUMN)72 4 a.m.(COLUMN)60(COLUMN)75 5 a.m.(COLUMN)60(COLUMN)78 6 a.m.(COLUMN)59(COLUMN)81 7 a.m.(COLUMN)60(COLUMN)78 8 a.m.(COLUMN)63(COLUMN)75 9 a.m.(COLUMN)68(COLUMN)63 10 a.m.(COLUMN)71(COLUMN)65 11 a.m.(COLUMN)75(COLUMN)60 12 noon(COLUMN)79(COLUMN)56 1 p.m.(COLUMN)82(COLUMN)53 2 p.m.(COLUMN)86(COLUMN)48 3 p.m.(COLUMN)88(COLUMN)38 4 p.m.(COLUMN)89(COLUMN)41 5 p.m.(COLUMN)89(COLUMN)41 6 p.m.(COLUMN)87(COLUMN)41 7 p.m.(COLUMN)85(COLUMN)39(END TABLE) Temperatures ending 8 a.m. (EDT) Yesterday(TABLE) City(COLUMN)H.(COLUMN)L. Albany(COLUMN)81(COLUMN)46 Albuqueraue(COLUMN)79(COLUMN)46 Amarillo(COLUMN)80(COLUMN)56 Anchorage(COLUMN)56(COLUMN)41 Asheville(COLUMN)81(COLUMN)53 Atlanta(COLUMN)85(COLUMN)60 Atlantic City(COLUMN)77(COLUMN)49 Austin(COLUMN)81(COLUMN)68 Baltimore(COLUMN)82(COLUMN)51 Bilings(COLUMN)61(COLUMN)43 Birhingham(COLUMN)90(COLUMN)60 Bismarck(COLUMN)75(COLUMN)55 Boise(COLUMN)57(COLUMN)36 Boston(COLUMN)83(COLUMN)64 Brownsville(COLUMN)85(COLUMN)76 Buffalo(COLUMN)75(COLUMN)60 Burlington(COLUMN)85(COLUMN)53 Casper(COLUMN)70(COLUMN)42 Charleston, S.C.(COLUMN)80(COLUMN)69 Charleston, WV(COLUMN)86(COLUMN)54 Charlotte(COLUMN)82(COLUMN)61 Cheyenne(COLUMN)65(COLUMN)39 Chicago(COLUMN)91(COLUMN)70 Cincinnati(COLUMN)85(COLUMN)59 Cleveland(COLUMN)84(COLUMN)57 Columbia, S.C.(COLUMN)87(COLUMN)61 Columbus(COLUMN)85(COLUMN)56 Dal-Ft. Worth(COLUMN)90(COLUMN)70 Dayton(COLUMN)87(COLUMN)64 Denver(COLUMN)78(COLUMN)51 Des Moines(COLUMN)87(COLUMN)63 Detriot(COLUMN)89(COLUMN)58 Duluth(COLUMN)80(COLUMN)56 El Paso(COLUMN)85(COLUMN)54 Fairbanks(COLUMN)55(COLUMN)34 Fargo(COLUMN)80(COLUMN)58 Flagstaff(COLUMN)59(COLUMN)37 Great Falls(COLUMN)46(COLUMN)33 Hartford(COLUMN)84(COLUMN)46 Helena(COLUMN)47(COLUMN)38 Honolulu(COLUMN)84(COLUMN)71 Houston(COLUMN)82(COLUMN)73 Indianopolis(COLUMN)88(COLUMN)63 Jackson, Miss.(COLUMN)90(COLUMN)62 Jacksonville(COLUMN)87(COLUMN)60 Juneau(COLUMN)58(COLUMN)34 Kansas City(COLUMN)80(COLUMN)62 Las Vegas(COLUMN)71(COLUMN)47 Little Rock(COLUMN)87(COLUMN)66 Los Angeles(COLUMN)67(COLUMN)56 Louiseville(COLUMN)88(COLUMN)63 Memphis(COLUMN)90(COLUMN)70 Miami Beach(COLUMN)82(COLUMN)74 Midland-Odessa(COLUMN)93(COLUMN)70 Milwaukee(COLUMN)89(COLUMN)61 Mpls-St. Paul(COLUMN)86(COLUMN)62 Nashville(COLUMN)87(COLUMN)61 New Orleans(COLUMN)86(COLUMN)60 New York(COLUMN)82(COLUMN)60 Norfolk(COLUMN)76(COLUMN)53 North Platte(COLUMN)83(COLUMN)53 Oklahoma City(COLUMN)81(COLUMN)60 Omaha(COLUMN)88(COLUMN)64 Orlando(COLUMN)87(COLUMN)63 Philadelphia(COLUMN)78(COLUMN)54 Phoenix(COLUMN)87(COLUMN)65 Pittsburg(COLUMN)81(COLUMN)51 Portland, Maine(COLUMN)74(COLUMN)54 Portland, Ore.(COLUMN)53(COLUMN)47 Providence(COLUMN)81(COLUMN)59 Raleigh(COLUMN)82(COLUMN)55 Rapid City(COLUMN)73(COLUMN)46 Reno(COLUMN)47(COLUMN)32 Richmond(COLUMN)82(COLUMN)53 St. Louis(COLUMN)89(COLUMN)68 St. Prbg.-Tampa(COLUMN)86(COLUMN)63 Salt Lake City(COLUMN)48(COLUMN)39 San Antonio(COLUMN)78(COLUMN)69 San Diego(COLUMN)62(COLUMN)55 San Francisco(COLUMN)56(COLUMN)49 San Juan(COLUMN)86(COLUMN)75 St. Ste. Marie(COLUMN)85(COLUMN)55 Seattle(COLUMN)53(COLUMN)50 Shreveport(COLUMN)85(COLUMN)63 Sioux Falls(COLUMN)88(COLUMN)61 Spokane(COLUMN)58(COLUMN)45 Syracuse(COLUMN)77(COLUMN)49 Topeka(COLUMN)85(COLUMN)62 Tucson(COLUMN)85(COLUMN)56 Tulsa(COLUMN)87(COLUMN)62 Washington(COLUMN)81(COLUMN)59 Wichita(COLUMN)84(COLUMN)59(END TABLE) Temperatures Abroad Yesterday(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)Temp. Aberdeen(COLUMN)clear(COLUMN)1 p.m.(COLUMN)52 Amsterdam(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)61 Ankara(COLUMN)pt. cldy(COLUMN)3 p.m.(COLUMN)68 Athens(COLUMN)clear(COLUMN)2 p.m.(COLUMN)73 Auckland(COLUMN)cloudy(COLUMN)Midnight(COLUMN)57 Berlin(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)61 Birmingham(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)50 Brussels(COLUMN)clear(COLUMN)1 p.m.(COLUMN)63 Cairo(COLUMN)clear(COLUMN)2 p.m.(COLUMN)90 Casablanca(COLUMN)clear(COLUMN)noon(COLUMN)64 Copenhagen(COLUMN)clear(COLUMN)1 p.m.(COLUMN)63 Dublin(COLUMN)clear(COLUMN)1 p.m.(COLUMN)52 Geneva(COLUMN)clear(COLUMN)1 p.m.(COLUMN)61 Hong Kong(COLUMN)pt. cldy(COLUMN)8 p.m.(COLUMN)84 Lisbon(COLUMN)pt. cldy(COLUMN)noon(COLUMN)59 London(COLUMN)rain(COLUMN)1 p.m.(COLUMN)52 Madrid(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)61 Malta(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)75 Manila(COLUMN)clear(COLUMN)8 p.m.(COLUMN)84 Moscow(COLUMN)pt. cldy(COLUMN)3 p.m.(COLUMN)72 New Delhi(COLUMN)clear(COLUMN)5 p.m.(COLUMN)100 Nice(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)63 Oslo(COLUMN)clear(COLUMN)1 p.m.(COLUMN)59 Paris(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)59 Peking(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)63 Rome(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)70 Saigon(COLUMN)pt. cldy(COLUMN)8 p.m.(COLUMN)86 Sofia(COLUMN)pt. cldy(COLUMN)2 p.m.(COLUMN)72 Stockholm(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)52 Sydney(COLUMN)cloudy(COLUMN)10 p.m.(COLUMN)63 Tel Aviv(COLUMN)clear(COLUMN)2 p.m.(COLUMN)91 Tokyo(COLUMN)clear(COLUMN)9 p.m.(COLUMN)61 Tunis(COLUMN)rain(COLUMN)1 p.m.(COLUMN)68 Warsaw(COLUMN)rain(COLUMN)1 p.m.(COLUMN)48(END TABLE) Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)Fair(COLUMN)90(COLUMN)79 Barbados(COLUMN)cloudy(COLUMN)86(COLUMN)79 Bermuda(COLUMN)clear(COLUMN)73(COLUMN)65 Bogata(COLUMN)pt. cldy(COLUMN)64(COLUMN)50 Calgary(COLUMN)cloudy(COLUMN)48(COLUMN)34 Culiacan(COLUMN)clear(COLUMN)95(COLUMN)52 Edmonton(COLUMN)cloudy(COLUMN)43(COLUMN)28 Havana(COLUMN)pt. cldy(COLUMN)82(COLUMN)70 Kingston(COLUMN)clear(COLUMN)86(COLUMN)77 Montego Bay(COLUMN)pt. cldy(COLUMN)87(COLUMN)72 Mexico City(COLUMN)pt. cldy(COLUMN)79(COLUMN)55 Monterray(COLUMN)pt. cldy(COLUMN)81(COLUMN)72 Nassau(COLUMN)clear(COLUMN)82(COLUMN)68 Ottawa(COLUMN)clear(COLUMN)82(COLUMN)57 Regina(COLUMN)cloudy(COLUMN)55(COLUMN)45 St. Kitts(COLUMN)pt. cldy(COLUMN)87(COLUMN)76 St. Thomas(COLUMN)pt. cldy(COLUMN)87(COLUMN)78 Toronto clear(COLUMN)75(COLUMN)61 Vancouver(COLUMN)cloudy(COLUMN)55(COLUMN)48 Veracruz(COLUMN)fair(COLUMN)90(COLUMN)75 Winnipeg(COLUMN)rain(COLUMN)75(COLUMN)50(END TABLE).