Washington: Today - Mostly cloudy but not so cool, high near 70, low near 50. The chance of rain is 20 percent through tonight. Winds will be light and variable. Sunday - Cloudy with a chance of occasional rain, high in the 60s.

Maryland: Today - Cloudy with a slight chance of showers, high near 70, low in the upper 40s. Sunday - Cloudy with a chance of occasional rain, high in the 60s.

Virginia: Today - Cloudy with a chance of showers, highs from the mid 60s to mid 70s, low near 50. Sunday - Cloudy with a chance of occasional rain, high near 70.

Lower Potomac and Chesapeake Bay - Variable cloudiness with winds from the west at 5 to 10 knots. Waves will average less than 1 foot. Visibility will be 5 miles or more.

Extended Area Forecast for Monday through Wednesday - Chance of showers Monday with variable cloudiness Tuesday and Wednesday. Highs will average in the 60s to near 70, lows in the 40s and 50s. Normal Washington temperatures for the period are a high of 75 and a low of 53.

West Virginia: Today - Variable cloudiness, highs from the mid 60s to mid 70s, lows in the 40s and 50s. Sunday - Partly cloudy, high near 70.

The National Weather Forecast for today - Snow will fall over much of the central Rockies and parts of the northern Rockies, changing to, or becoming mixed with rain in the lower elevations. Rain will extend from the central Plains into the lower Ohio Valley, with showers or thunderstorms likely from the southern Rockies across the southern Plains into the lower Mississippi Valley, Tennessee and Georgia. Rain is also likely from the lower Great Lakes into New England. Skies will be sunny over much of California into the central and northern Plateau. Mild temperatures can be expected from southern and eastern Texas to the southern half of the Atlantic Coast. Much of the remainder of the nation will continue cool.

Almanac Data for today: The sun rises 6:05 a.m., sets 8:05 p.m.; moon rises 5:56, sets 7:41 p.m. Tides: high 8:05 a.m. and 9:00 p.m., low 2:42 a.m. and 3:15 p.m. High and low tides at the following locations may be obtained by subtracting the hours indicated from the hours above: Annapolis (3 1/4), Bloody Point Lighthouse (4 1/2), Deale, Md. (4 1/2), Colonial Beach (5 1/4), Norfolk (1), Virginia Beach (3/4), Solomons Island (3/4), Point Lookout (7).

Pollen Count: Incomplete due to rain (a reading of more than 7 is considered to be undesirable).

The Council of Governments' Air Quality Index for yesterday showed the high reading in the Washington area during the 3 p.m. period was 17 for the pollutant, photochemical oxidants. Index values between 0 and 24 indicate good 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 the air quality will remain good.

The National Weather Service forecasts the Potomac River stage at Little Falls should rise to 4.2 feet today. Local Temps., Humidity(TABLE) Time(COLUMN)T.(COLUMN)H. 12 mid.(COLUMN)50(COLUMN)86 1 a.m.(COLUMN)50(COLUMN)86 2 a.m.(COLUMN)50(COLUMN)86 3 a.m.(COLUMN)50(COLUMN)89 4 a.m.(COLUMN)49(COLUMN)93 5 a.m.(COLUMN)49(COLUMN)89 6 a.m.(COLUMN)48(COLUMN)89 7 a.m.(COLUMN)48(COLUMN)89 8 a.m.(COLUMN)48(COLUMN)89 9 a.m.(COLUMN)49(COLUMN)86 10 a.m.(COLUMN)50(COLUMN)83 11 a.m.(COLUMN)50(COLUMN)83 12 noon(COLUMN)51(COLUMN)80 1 p.m.(COLUMN)51(COLUMN)80 2 p.m.(COLUMN)53(COLUMN)77 3 p.m.(COLUMN)53(COLUMN)77 4 p.m.(COLUMN)54(COLUMN)77 5 p.m.(COLUMN)55(COLUMN)75 6 p.m.(COLUMN)55(COLUMN)77 7 p.m. 55(COLUMN)77(END TABLE) Temperatures ending 8 a.m. (EST) yesterday:(TABLE) City(COLUMN)H.(COLUMN)L. Albany(COLUMN)56(COLUMN)42 Albuquerque(COLUMN)70(COLUMN)46 Amarillo(COLUMN)61(COLUMN)48 Anchorage(COLUMN)56(COLUMN)45 Asheville(COLUMN)59(COLUMN)50 Atlanta(COLUMN)73(COLUMN)46 Atlantic City(COLUMN)51(COLUMN)43 Austin(COLUMN)76(COLUMN)63 Baltimore(COLUMN)55(COLUMN)45 Billings(COLUMN)48(COLUMN)38 Birmingham(COLUMN)65(COLUMN)50 Bismarck(COLUMN)60(COLUMN)47 Boise(COLUMN)51(COLUMN)33 Boston(COLUMN)54(COLUMN)46 Brownsville(COLUMN)90(COLUMN)61 Buffalo(COLUMN)53(COLUMN)42 Burlington, Vt.(COLUMN)53(COLUMN)37 Casper(COLUMN)36(COLUMN)31 Charleston, S.C.(COLUMN)76(COLUMN)63 Charstn, W.Va.(COLUMN)63(COLUMN)54 Charlotte(COLUMN)60(COLUMN)63 Cheyenne(COLUMN)51(COLUMN)29 Chicago(COLUMN)48(COLUMN)38 Cincinnati(COLUMN)56(COLUMN)50 Cleveland(COLUMN)59(COLUMN)44 Columbus, S.C.(COLUMN)81(COLUMN)55 Columbus(COLUMN)50(COLUMN)46 Dal.-Ft. Worth(COLUMN)65(COLUMN)51 Dayton(COLUMN)53(COLUMN)49 Denver(COLUMN)56(COLUMN)37 Des Moines(COLUMN)55(COLUMN)43 Detroit(COLUMN)54(COLUMN)39 Duluth(COLUMN)57(COLUMN)34 El Paso(COLUMN)85(COLUMN)65 Fairbanks(COLUMN)62(COLUMN)40 Fargo(COLUMN)71(COLUMN)42 Flagstaff(COLUMN)65(COLUMN)44 Great Falls(COLUMN)51(COLUMN)35 Hartford(COLUMN)58(COLUMN)37 Helena(COLUMN)54(COLUMN)38 Honolulu(COLUMN)82(COLUMN)72 Houston(COLUMN)74(COLUMN)62 Indianapolis(COLUMN)59(COLUMN)50 Jackson(COLUMN)66(COLUMN)44 Jacksonville(COLUMN)82(COLUMN)60 Juneau(COLUMN)47(COLUMN)38 Kansas City(COLUMN)49(COLUMN)39 Las Vegas(COLUMN)89(COLUMN)57 Little Rock(COLUMN)58(COLUMN)46 Los Angeles(COLUMN)65(COLUMN)57 Louisville(COLUMN)58(COLUMN)52 Memphis(COLUMN)62(COLUMN)53 Miami Beach(COLUMN)83(COLUMN)79 Midland(COLUMN)83(COLUMN)51 Milwaukee(COLUMN)47(COLUMN)39 Mpls.-St. Paul(COLUMN)68(COLUMN)42 Nashville(COLUMN)63(COLUMN)53 New Orleans(COLUMN)74(COLUMN)54 New York(COLUMN)59(COLUMN)41 Norfolk(COLUMN)63(COLUMN)52 North Platte(COLUMN)48(COLUMN)36 Oklahoma City(COLUMN)61(COLUMN)51 Omaha(COLUMN)57(COLUMN)2 Orlando(COLUMN)79(COLUMN)70 Philadelphia(COLUMN)69(COLUMN)44 Phoenix(COLUMN)93(COLUMN)64 Pittsburgh(COLUMN)53(COLUMN)44 Portland, Me.(COLUMN)55(COLUMN)38 Portland, Ore.(COLUMN)53(COLUMN)36 Providence(COLUMN)60(COLUMN)39 Raleigh(COLUMN)62(COLUMN)50 Rapid City(COLUMN)52(COLUMN)39 Reno(COLUMN)66(COLUMN)36 Richmond(COLUMN)56(COLUMN)47 St. Louis(COLUMN)47(COLUMN)40 St. Prbg.-Tampa(COLUMN)82(COLUMN)63 Salt Lake City(COLUMN)53(COLUMN)31 San Antonio(COLUMN)78(COLUMN)58 San Diego(COLUMN)66(COLUMN)62 San Francisco(COLUMN)65(COLUMN)52 San Juan(COLUMN)86(COLUMN)73 St. Ste. Marie(COLUMN)57(COLUMN)36 Seattle(COLUMN)55(COLUMN)41 Shreveport(COLUMN)66(COLUMN)44 Sioux Falls(COLUMN)62(COLUMN)38 Spokane(COLUMN)48(COLUMN)30 Syracuse(COLUMN)55(COLUMN)45 Topeka(COLUMN)52(COLUMN)37 Tucson(COLUMN)86(COLUMN)63 Tulsa(COLUMN)59(COLUMN)45 Washington(COLUMN)56(COLUMN)48 Wichita(COLUMN)54(COLUMN)38(END TABLE) Temperatures Abroad Yesterday(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)Temp Aberdeen(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)45 Amsterdam(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)70 Ankara(COLUMN)cloudy(COLUMN)3 p.m.(COLUMN)64 Auckland(COLUMN)clear(COLUMN)midnight(COLUMN)50 Berlin(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)70 Birmingham(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)50 Brussels(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)68 Cairo(COLUMN)pt. cldy.(COLUMN)2 p.m.(COLUMN)77 Casablanca(COLUMN)pt. cldy.(COLUMN)noon(COLUMN)63 Copenhagen(COLUMN)clear(COLUMN)1 p.m.(COLUMN)63 Dublin(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)52 Geneva(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)61 Hong Kong(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)75 Jerusalem(COLUMN)clear(COLUMN)2 p.m.(COLUMN)68 Lisbon(COLUMN)cloudy(COLUMN)noon(COLUMN)59 London(COLUMN)rain(COLUMN)1 p.m.(COLUMN)54 Madrid(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)59 Malta(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)64 Manila(COLUMN)clear(COLUMN)8 p.m.(COLUMN)84 Moscow(COLUMN)rain(COLUMN)3 p.m.(COLUMN)39 New Delhi(COLUMN)clear(COLUMN)5 p.m.(COLUMN)108 Nice(COLUMN)rain(COLUMN)1 p.m.(COLUMN)59 Oslo(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)45 Paris(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)57 Peking(COLUMN)clear(COLUMN)8 p.m.(COLUMN)63 Rome(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)70 Saigon(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)86 Sofia(COLUMN)pt. cldy.(COLUMN)2 p.m.(COLUMN)70 Stockholm(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)54 Sydney(COLUMN)clear(COLUMN)10 p.m.(COLUMN)66 Tokyo(COLUMN)cloudy(COLUMN)9 p.m.(COLUMN)66 Tunis(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)72 Vienna(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)68 Warsaw(COLUMN)clear(COLUMN)1 p.m.(COLUMN)63(END TABLE) Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)fair(COLUMN)86(COLUMN)73 Barbados(COLUMN)fair(COLUMN)86(COLUMN)79 Bermuda(COLUMN)pt. cldy.(COLUMN)72(COLUMN)69 Calgary(COLUMN)pt. cldy.(COLUMN)45(COLUMN)32 Culiacan(COLUMN)cloudy(COLUMN)88(COLUMN)66 Edmonton(COLUMN)clear(COLUMN)55(COLUMN)30 Havana(COLUMN)fair(COLUMN)88(COLUMN)81 Montego Bay(COLUMN)clear(COLUMN)93(COLUMN)73 Mexico City(COLUMN)fair(COLUMN)84(COLUMN)57 Montreal(COLUMN)cloudy(COLUMN)55(COLUMN)39 Monterrey(COLUMN)fair(COLUMN)93(COLUMN)66 Nassau(COLUMN)cloudy(COLUMN)86(COLUMN)75 Ottawa(COLUMN)pt. cldy.(COLUMN)55(COLUMN)37 Regina(COLUMN)cloudy(COLUMN)59(COLUMN)45 St. Kitts(COLUMN)fair(COLUMN)98(COLUMN)75 Toronto(COLUMN)rain(COLUMN)49(COLUMN)41 Vancouver(COLUMN)clear(COLUMN)55(COLUMN)39 Veracruz(COLUMN)cloudy(COLUMN)83(COLUMN)73 Winnipeg(COLUMN)cloudy(COLUMN)73(COLUMN)45(END TABLE)