Washington: Today - Cloudy, rain possible, high in mid 50s, low in mid 40s. The chance of rain is 50 percent today and 20 percent tonight. Wind will be from the northeast at from 15 to 25 knots today, shifting to from the north later in the day. Thursday - Partly sunny, high in the low 60s.

Maryland and Virginia: Today - Cloudy, rain possible, highs from the 50s to the 60s, lows from the low 40s to near 50s. Thursday - Partly cloudy, highs in the 60s.

Lower Potomac and Chesapeake Bay: Today - Rain possible. Visibility will be variable - except less than 2 miles in rain. Wind will be from the northeast at up to 35 knots this morning, shifting to from the north at from 18 to 30 knots this afternoon, then becoming northwesterly at from 12 to 20 knots tonight. Waves in unprotected waters will be from 2 to 3 feet.

Extended Area Forcast for Friday through Sunday: Fair through the period with a chance of rain on Sunday. Highs will be in the 60s, lows in the 40s. Normal Washington temperatures for the period are a high of 72 and a low of 50.

West Virginia: Today - Partly cloudy, highs from the mid 50s to the low 60s, lows from the mid 30s to the mid 40s. Thursday - Fair, highs from the low to mid 60s.

The National Weather Forecast for today - Rain will extend from Georgia through the Virginias. Showers will also scatter from the northern two-thirds of the Rockies through the Great Basin and the Pacific Coast from northern California across Washington. Temperatures will remain mild from the Pacific Coast through the Mississippi Valley and the Gulf of Mexico Coast. Temperatures over the remainder of the nation will be unseasonably cool.

Simanac Delta for today: The sun rises 5:17 a.m., sets 6:55 p.m. moon rises 10:55 p.m., sets 8:13 a.m. Tides: high 10:15 a.m. and 10:45 p.m., low 4:32 a.m. and 5:17 p.m. High and low tides at the following locations may be obtained by subtracting the hours indicated from the hours above: Annapolis (3 1/2), Bloody Point Light-Induse (4 1/2), Deale, Md. (4 1/2), Colential Beach (5 1/4), Norfolk (1), Virginia Beach (3/4), Solomons Island (6 1/4), Point Lookout (7).

Pollen Count: 147 for trees (a reading of more than 7 is considered to be undesirable).

The Council of Governments' Air eqality index for yesterday showed the high reading in the Washington area during the 2 p.m. to 3 p.m. period was 31 for the polluatnt, photochemical oxidants. Index values between 25 and 49 indicate fair air quality. 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 he air quality will improve.

The National Weather Service forecasts the Potomac River stage at Little Falls should be near 4 feet today. Local Temp. Humidity(TABLE) Time(COLUMN)T.(COLUMN)H. 12 m-n(COLUMN)55(COLUMN)63 1 a.m.(COLUMN)54(COLUMN)64 2 a.m.(COLUMN)54(COLUMN)62 3 a.m.(COLUMN)53(COLUMN)63 4 a.m.(COLUMN)53(COLUMN)61 6 a.m.(COLUMN)51(COLUMN)58 7 a.m.(COLUMN)54(COLUMN)47 8 a.m.(COLUMN)55(COLUMN)42 9 a.m.(COLUMN)58(COLUMN)37 10 a.m.(COLUMN)58(COLUMN)39 11 a.m.(COLUMN)60(COLUMN)36 12 noon(COLUMN)61(COLUMN)35 1 p.m.(COLUMN)63(COLUMN)34 2 p.m.(COLUMN)64(COLUMN)34 3 p.m.(COLUMN)62(COLUMN)32 4 p.m.(COLUMN)61(COLUMN)36 5 a.M.(COLUMN)60(COLUMN)39 6 p.m.(COLUMN)59(COLUMN)44 7 p.m.(COLUMN)59(COLUMN)46(END TABLE) Temperatures ending 7 a.m. (EST) yesterday:(TABLE) City(COLUMN)H.(COLUMN)L. Albany(COLUMN)64(COLUMN)32 Albuquerque(COLUMN)79(COLUMN)54 Amarillo(COLUMN)72(COLUMN)41 Anchorage(COLUMN)47(COLUMN)35 Asheville(COLUMN)74(COLUMN)52 Atlanta(COLUMN)77(COLUMN)55 Atlantic City(COLUMN)58(COLUMN)44 Austin(COLUMN)89(COLUMN)66 Baltimore(COLUMN)70(COLUMN)42 Billings(COLUMN)64(COLUMN)41 Burmingham(COLUMN)78(COLUMN)55 Bismarck(COLUMN)55(COLUMN)32 Boise(COLUMN)67(COLUMN)48 Boston(COLUMN)68(COLUMN)49 Brownsville(COLUMN)89(COLUMN)66 Buffalo(COLUMN)61(COLUMN)33 Burlington(COLUMN)56(COLUMN)41 Casper(COLUMN)61(COLUMN)35 Charleston, S.C.(COLUMN)76(COLUMN)64 Charleston W Va(COLUMN)72(COLUMN)50 Charlotte(COLUMN)79(COLUMN)57 Cheyenne(COLUMN)60(COLUMN)35 Chicago(COLUMN)65(COLUMN)44 Cincinnati(COLUMN)68(COLUMN)49 Cleveland(COLUMN)56(COLUMN)38 Columbia, S.C.(COLUMN)79(COLUMN)58 Columbus, Ohio(COLUMN)66(COLUMN)48 Dal.-Ft. Worth(COLUMN)85(COLUMN)51 Dayton(COLUMN)68(COLUMN)47 Dnenver(COLUMN)63(COLUMN)45 Des Moines(COLUMN)48(COLUMN)44 Detroit(COLUMN)56(COLUMN)35 Duluth(COLUMN)50(COLUMN)36 El Paso(COLUMN)91(COLUMN)57 Fairbanks(COLUMN)53(COLUMN)35 Fargo(COLUMN)55(COLUMN)32 Flagstaff(COLUMN)71(COLUMN)39 Great Falls(COLUMN)64(COLUMN)35 Hartford(COLUMN)70(COLUMN)40 Helena(COLUMN)67(COLUMN)46 Honolulu(COLUMN)85(COLUMN)73 Houston(COLUMN)83(COLUMN)66 Indianapolis(COLUMN)61(COLUMN)49 Jackson, Miss.(COLUMN)82(COLUMN)61 Jacksonville(COLUMN)80(COLUMN)56 Juneau(COLUMN)60(COLUMN)37 Kansas City(COLUMN)61(COLUMN)45 Las Vegas(COLUMN)85(COLUMN)65 Little Rock(COLUMN)75(COLUMN)49 Los Angeles(COLUMN)72(COLUMN)56 Louisville(COLUMN)72(COLUMN)47 Memphis(COLUMN)80(COLUMN)53 Miami Beach(COLUMN)75(COLUMN)65 Midland-Odessa(COLUMN)88(COLUMN)53 Milwaukee(COLUMN)52(COLUMN)37 Mpls-St. Paul(COLUMN)48(COLUMN)44 Nashville(COLUMN)78(COLUMN)52 New Orleans(COLUMN)86(COLUMN)66 New York(COLUMN)71(COLUMN)49 Norfolk(COLUMN)76(COLUMN)50 North Platte(COLUMN)58(COLUMN)25 Oklahoma City(COLUMN)77(COLUMN)45 Omaha(COLUMN)49(COLUMN)40 Orlando(COLUMN)85(COLUMN)64 Philadelphia(COLUMN)67(COLUMN)45 Phoenix(COLUMN)94(COLUMN)68 Pittsburgh(COLUMN)62(COLUMN)44 Portland, maine(COLUMN)54(COLUMN)39 Portland, Ore.(COLUMN)69(COLUMN)56 Providence(COLUMN)68(COLUMN)38 Raleigh(COLUMN)80(COLUMN)50 Rapid City(COLUMN)55(COLUMN)33 Reno(COLUMN)65(COLUMN)49 Richmond(COLUMN)79(COLUMN)47 St. Louis(COLUMN)66(COLUMN)47 St. Porth-Tampa(COLUMN)85(COLUMN)62 Salt Lake City(COLUMN)71(COLUMN)50 San Antonio(COLUMN)85(COLUMN)65 San Diego(COLUMN)72(COLUMN)57 San Francisco(COLUMN)59(COLUMN)53 San Juan(COLUMN)84(COLUMN)72 St. Ste Marie(COLUMN)63(COLUMN)38 Seattle(COLUMN)70(COLUMN)53 Shreveport(COLUMN)86(COLUMN)58 Sioux Falls(COLUMN)43(COLUMN)36 Spokane(COLUMN)61(COLUMN)49 Syracuse(COLUMN)60(COLUMN)33 Topera(COLUMN)65(COLUMN)44 Tucason(COLUMN)89(COLUMN)63 Tuisa(COLUMN)77(COLUMN)45 Washington(COLUMN)72(COLUMN)58 Wichia(COLUMN)72(COLUMN)38(END TABLE) Temperatures Abroad Yesterday(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)Temp. Aberdeen(COLUMN)rain(COLUMN)1 p.m.(COLUMN)41 Amsterdam(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)48 Ankara(COLUMN)pt. cloudy(COLUMN)1 p.m.(COLUMN)48 Athens(COLUMN)clear(COLUMN)2 p.m.(COLUMN)66 Auckland(COLUMN)pt. cldy.(COLUMN)m-night(COLUMN)61 Berlin(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)46 Birmingham(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)45 Brussels(COLUMN)clear(COLUMN)1 p.m.(COLUMN)54 Cairo(COLUMN)clear(COLUMN)2 p.m.(COLUMN)73 Casablanca(COLUMN)pt. cldy.(COLUMN)noon(COLUMN)66 Copenhagen(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)39 Dublin(COLUMN)rain(COLUMN)1 p.m.(COLUMN)45 Geneva(COLUMN)clear(COLUMN)1 p.m.(COLUMN)57 Hong Kong(COLUMN)clear(COLUMN)2 p.m.(COLUMN)73 Lisbon(COLUMN)cloudy(COLUMN)noon(COLUMN)61 London(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)49 Madrid(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)54 Malta(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)61 Manila(COLUMN)clear(COLUMN)8 p.m.(COLUMN)82 Moscow(COLUMN)rain(COLUMN)3 p.m.(COLUMN)39 New Delhi(COLUMN)pt. cldy.(COLUMN)5 p.m.(COLUMN)95 Nice(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)57 Oslb(COLUMN)clear(COLUMN)1 p.m.(COLUMN)37 Paris(COLUMN)clear(COLUMN)1 p.m.(COLUMN)59 Peking(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)63 Rome(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)61 Saigon(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)84 Sofla(COLUMN)pt. cldy.(COLUMN)2 p.m.(COLUMN)63 Stockholm(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)36 Syndey(COLUMN)cloduy(COLUMN)1 p.m.(COLUMN)36 Tokyo(COLUMN)clear(COLUMN)9 p.m.(COLUMN)55 Tunis(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)66 Vienna(COLUMN)clear(COLUMN)1 p.m.(COLUMN)63 Warsaw(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)50(END TABLE) Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)haze(COLUMN)87(COLUMN)73 Barbados(COLUMN)sunny(COLUMN)86(COLUMN)78 Bermuda(COLUMN)pt. cldy.(COLUMN)68(COLUMN)63 Bogota(COLUMN)cloudy(COLUMN)68(COLUMN)63 Calgary(COLUMN)cloudy(COLUMN)55(COLUMN)37 Culiacan(COLUMN)haze(COLUMN)93(COLUMN)59 Edmonston(COLUMN)clear(COLUMN)54(COLUMN)35 Hargana(COLUMN)pt. cldy.(COLUMN)84(COLUMN)73 Kingston(COLUMN)pt. cldy.(COLUMN)88(COLUMN)85 Montago Bay(COLUMN)haze(COLUMN)81(COLUMN)58 Mexico City(COLUMN)haze(COLUMN)81(COLUMN)58 Monterrey(COLUMN)clear(COLUMN)86(COLUMN)61 Montreal(COLUMN)clear(COLUMN)59(COLUMN)39 Ottawa(COLUMN)clear(COLUMN)59(COLUMN)41 Regina(COLUMN)pt. cldy.(COLUMN)59(COLUMN)37 St. Kitts(COLUMN)sunny(COLUMN)87(COLUMN)78 Thomas(COLUMN)sunny(COLUMN)87(COLUMN)78 Toronto(COLUMN)sunny(COLUMN)86(COLUMN)74 Vancouver(COLUMN)cloudy(COLUMN)57(COLUMN)48 Veracruz(COLUMN)haze(COLUMN)87(COLUMN)75 Winnipeg(COLUMN)cloudy(COLUMN)63(COLUMN)36(END TABLE)