Washington: Today - Increasingly cloudy, high in the low 50s, low in the mid 30s. The chance of rain is near 20 per cent. Friday - Sunny, high near 50.

Maryland and Virginia: Today - Increasingly cloudy, highs from the low 40s to the low 60s, lows from the mid 20s to the low 40s. Friday - Sunny, highs from the mid 20s to the mid 60s.

West Virginia: Today - Partly cloudy, highs from the low 40s to the low 50s, lows from the low 20s to the low 30s. Friday - Sunny, highs from the mid 30s to the upper 40s. In northern portions, it will be cloudy with a chance of snow flurries.

Lower Potomac and Chesapeake Bay: Today - Partly to mostly cloudy, with visibility of more than 5 miles. Winds will be from the southwest at from 10 to 25 knots. Waves in unprotected waters will be from 1 to 2 feet.

Extended Area Forecast for Saturday through Monday: Fair through the period. Highs will range from the 50s on Saturday to near 70 by Monday. Saturday lows will be in the 30s, and by Sunday, lows will be near 50. Normal Washington temperatures for the period are a high of 65 and a low to The National Weather Forecast for today - Rain or snow will scatter across much of the Great Lakes. Elsewhere, fair or partly cloudy skies are forecast. It will be warmer from the Mississippi Valley across the southeast, the Ohio Valley, the Appalachians, the central Plains and the northern Rockies. Little temperature change is forecast elsewhere.

Almanac Data for Today - Sun rises 5:44 a.m., sets 6:37 p.m.; moon rises 10:55 p.m., sets 8:17 p.m. Tides: High 10:21 a.m. and 10:50 p.m., low 4:37 a.m. and 5:19 p.m. High and low tides at the following locations can be obtained by subtracting 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).

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 14 for the pollutant, photochemical oxidants. Index values between zero and 24 indicate good air quality. 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 be good.

The National Weather Service forecasts that the Potomac River stage at Little Falls will drop from a crest of near 9 feet. Local Temp., Humidity(TABLE) Time(COLUMN)T.(COLUMN)H. 12 mid.(COLUMN)45(COLUMN)51 1 a.m.(COLUMN)45(COLUMN)53 2 a.m.(COLUMN)43(COLUMN)57 3 a.m.(COLUMN)42(COLUMN)60 4 a.m.(COLUMN)41(COLUMN)62 5 a.m.(COLUMN)40(COLUMN)67 6 a.m.(COLUMN)39(COLUMN)73 7 a.m.(COLUMN)41(COLUMN)67 8 a.m.(COLUMN)46(COLUMN)54 9 a.m.(COLUMN)48(COLUMN)46 10 a.m.(COLUMN)48(COLUMN)42 11 a.m.(COLUMN)52(COLUMN)33 12 noon(COLUMN)52(COLUMN)32 1 p.m.(COLUMN)52(COLUMN)29 2 p.m.(COLUMN)52(COLUMN)32 3 p.m.(COLUMN)53(COLUMN)34 4 p.m.(COLUMN)53(COLUMN)34 5 p.m.(COLUMN)49(COLUMN)42 6 p.m.(COLUMN)44(COLUMN)55 7 p.m.(COLUMN)62(COLUMN)62(END TABLE) Temperatures ending 8 a.m. (EST) yesterday:(TABLE) City(COLUMN)H.(COLUMN)L. Albany(COLUMN)43(COLUMN)35 Albuquerque(COLUMN)66(COLUMN)41 Amarillo(COLUMN)68(COLUMN)39 Anchorage(COLUMN)42(COLUMN)29 Asheville(COLUMN) [WORD ILLEGIBLE] (COLUMN)26 Atlanta(COLUMN)58(COLUMN)32 Atlantic City(COLUMN)58(COLUMN)32 Austin(COLUMN)73(COLUMN)75 Baltimore(COLUMN)58(COLUMN)78 Billings(COLUMN)65(COLUMN)39 Birmingham(COLUMN)55(COLUMN)35 Bismarck(COLUMN)45(COLUMN)24 Bolse(COLUMN)74(COLUMN)67 Boston(COLUMN)78(COLUMN)42 Brownsville(COLUMN)76(COLUMN)48 Buffalo(COLUMN)52(COLUMN)28 Burlington(COLUMN)43(COLUMN)35 Casper(COLUMN)54(COLUMN)32 Charleston, SC(COLUMN)71(COLUMN)45 Charleston, WV(COLUMN)61(COLUMN)34 Charlotte(COLUMN)66(COLUMN)32 Cheyenne(COLUMN)50(COLUMN)31 Chicago(COLUMN)42(COLUMN)25 Cincinnati(COLUMN)43(COLUMN)30 Cleveland(COLUMN)58(COLUMN)29 Columbia, SC(COLUMN)76(COLUMN)39 Columbus(COLUMN)51(COLUMN)30 Dal.-Ft. Worth(COLUMN)70(COLUMN)73 Dayton(COLUMN)72(COLUMN)30 Denver(COLUMN)63(COLUMN)36 Des Moines(COLUMN)41(COLUMN)26 Detroit(COLUMN)20(COLUMN)29 Duluth(COLUMN)23(COLUMN)19 El Paso(COLUMN)71(COLUMN)37 Fairbanks(COLUMN)34(COLUMN)27 Fargo(COLUMN)22(COLUMN)16 Flagstaff(COLUMN)11(COLUMN)70 Great Falls(COLUMN)65(COLUMN)40 Hartford(COLUMN)47(COLUMN)40 Helena(COLUMN)63(COLUMN)30 Honolulu(COLUMN)31(COLUMN)70 Houston(COLUMN)70(COLUMN)57 Indianapolis(COLUMN)43(COLUMN)30 Jackson, Miss.(COLUMN)61(COLUMN)37 Jacksonville(COLUMN)77(COLUMN)42 Juneau(COLUMN)45(COLUMN)61 Kansas City(COLUMN)46(COLUMN)34 Las Vegas(COLUMN)82(COLUMN)51 Little Rock(COLUMN)58(COLUMN)42 Los Angeles(COLUMN)78(COLUMN)56 Louisville(COLUMN)46(COLUMN)35 Memphis(COLUMN)56(COLUMN)41 Miami Beach(COLUMN)85(COLUMN)68 Midland-Odessa(COLUMN)70(COLUMN)40 Milwaukee(COLUMN)38(COLUMN)23 Mpls.-St. Paul(COLUMN)38(COLUMN)20 Nashville(COLUMN)49(COLUMN)31 New Orleans(COLUMN)66(COLUMN)41 New York(COLUMN)50(COLUMN)39 Norfolk(COLUMN)77(COLUMN)43 North Platte(COLUMN)53(COLUMN)29 Oklahoma City(COLUMN)69(COLUMN)38 Omaha(COLUMN)49(COLUMN)37 Orlando(COLUMN)63(COLUMN)52 Philadelphia(COLUMN)60(COLUMN)41 Phoenix(COLUMN)26(COLUMN)59 Pittsburgh(COLUMN)57(COLUMN)30 Portland, Me.(COLUMN)37(COLUMN)32 Portland, Ore.(COLUMN)77(COLUMN)44 Providence(COLUMN)63(COLUMN)43 Raleigh(COLUMN)73(COLUMN)34 Rapid City(COLUMN)48(COLUMN)35 Reno(COLUMN)78(COLUMN)34 Richmond(COLUMN)70(COLUMN)79 St. Louis(COLUMN)44(COLUMN)33 St. Prbg.-T'mpa(COLUMN)81(COLUMN)51 Salt Lake City(COLUMN)64(COLUMN)40 San Antonio(COLUMN)73(COLUMN)41 San Diego(COLUMN)71(COLUMN)57 San Francisco(COLUMN)54(COLUMN)46 San Juan(COLUMN)86(COLUMN)74 St. Ste. Marie(COLUMN)27(COLUMN)11 Seattle(COLUMN)73(COLUMN)46 Shreveport(COLUMN)65(COLUMN)39 Sioux Falls(COLUMN)43(COLUMN)23 Spokane(COLUMN)70(COLUMN)40 Syracuse(COLUMN)54(COLUMN)32 Topeka(COLUMN)51(COLUMN)38 Tucson(COLUMN)79(COLUMN)41 Tulsa(COLUMN)61(COLUMN)64 Washington(COLUMN)60(COLUMN)39 Wichita(COLUMN)57(COLUMN)39(END TABLE) Temperatures Abroad Yesterday(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)Temp. Aberdeen(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)39 Amsterdam(COLUMN)rain(COLUMN)1 p.m.(COLUMN)43 Ankara(COLUMN)pt. cldy(COLUMN)3 p.m.(COLUMN)70 Athens(COLUMN)clear(COLUMN)2 p.m.(COLUMN)70 Auckland(COLUMN)clear(COLUMN)mid(COLUMN)59 Berlin(COLUMN)rain(COLUMN)1 p.m.(COLUMN)45 Birmingham(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)48 Brussels(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)46 Cairo(COLUMN)clear(COLUMN)2 p.m.(COLUMN)84 Casablanca(COLUMN)pt. cldy(COLUMN)noon(COLUMN)64 Copenhagen(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)43 Dublin(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)45 Geneva(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)55 Hong Kong(COLUMN)clear(COLUMN)8 p.m.(COLUMN)85 Lisbon(COLUMN)pt. cldy(COLUMN)noon(COLUMN)57 London(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)48 Madrid(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)55 Malta(COLUMN)clear(COLUMN)1 p.m.(COLUMN)79 Manila(COLUMN)clear(COLUMN)8 p.m.(COLUMN)82 Moscow(COLUMN)pt. cldy(COLUMN)3 p.m.(COLUMN)41 New Delhi(COLUMN)pt. cldy(COLUMN)5 p.m.(COLUMN)75 Nice(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)59 Oslo(COLUMN)snow(COLUMN)1 p.m.(COLUMN)34 Paris(COLUMN)clear(COLUMN)1 p.m.(COLUMN)52 Peking(COLUMN)clear(COLUMN)8 p.m.(COLUMN)48 Rome(COLUMN)clear(COLUMN)1 p.m.(COLUMN)66 Saigon(COLUMN)clear(COLUMN)8 p.m.(COLUMN)82 Sofia(COLUMN)pt. cldy(COLUMN)2 p.m.(COLUMN)46 Stockholm(COLUMN)snow(COLUMN)1 p.m.(COLUMN)34 Sydney(COLUMN)cloudy(COLUMN)10 p.m.(COLUMN)77 Tel Aviv(COLUMN)pt. cldy(COLUMN)2 p.m.(COLUMN)68 Tokyo(COLUMN)cloudy(COLUMN)9 p.m.(COLUMN)63 Tunis(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)75 Vienna(COLUMN)clear(COLUMN)1 p.m.(COLUMN)55 Warsaw(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)45(END TABLE) Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)sunny(COLUMN)88(COLUMN)73 Barbados(COLUMN)pt. cldy(COLUMN)82(COLUMN)75 Bermuda(COLUMN)pt. sunny(COLUMN)73(COLUMN)69 Calgary(COLUMN)clear(COLUMN)70(COLUMN)43 Culiacan(COLUMN)sunny(COLUMN)95(COLUMN)57 Edmonton(COLUMN)clear(COLUMN)70(COLUMN)36 Havana(COLUMN)cloudy(COLUMN)90(COLUMN)73 Kingston(COLUMN)sunny(COLUMN)86(COLUMN)72 Montego Bay(COLUMN)sunny(COLUMN)81(COLUMN)68 Mexico City(COLUMN)haze(COLUMN)73(COLUMN)41 Monterrey(COLUMN)pt. sunny(COLUMN)77(COLUMN)46 Montreal(COLUMN)cloudy(COLUMN)41(COLUMN)28 Nassau(COLUMN)cloudy(COLUMN)86(COLUMN)72 Ottawa(COLUMN)snow(COLUMN)48(COLUMN)23 Regina(COLUMN)clear(COLUMN)41(COLUMN)21 St. Kitts(COLUMN)pt. cldy(COLUMN)85(COLUMN)70 Toronto(COLUMN)pt. cldy(COLUMN)45(COLUMN)25 Vancouver(COLUMN)clear(COLUMN)61(COLUMN)43 Veracruz(COLUMN)pt. cldy(COLUMN)81(COLUMN)66 Winnipeg(COLUMN)cloudy(COLUMN)30(COLUMN)12(END TABLE)