Washington: Today - Cloudy, sleet of snow likely this afternoon, rain tonight, high near 40, low in low 30s. The chance of precipitation is 50 per cent today and 60 per cent tonight. Saturday - Rain, high in low 40s.

Maryland and Virginia: Today - Cloudy, rain or snow likely, highs from the 30s to the 40s, lows from the 20s to the 30s. Saturday - Rain, highs from the 30s to the 40s.

Lower Potomac and Chesapeake Bay: Today - Cloudy, precipitation likely. Visibility will be more than 5 miles, except dropping to less than 3 miles in precipitation. Wind will be from the southeast at less than 20 knots. Waves in unprotected waters will be less than two feet.

Extended Area Forecast for Sunday through Tuesday: Variably cloudythrough the period. There will be a chance of snow in the mountains beginning Sunday, and a chance of rain through the remainder of the area by Monday. Highs will be from the 40s to the low 50s, lows in the 30s. Normal Washington temperatures for the period are a high of 43 and a low of 27.

West Virginia: Today - Rain, highs from the low 30s to near 40, lows from the upper 20s to the low 30s.Saturday - Rain ending, highs in the 30s.

The National Weather Forecast for today - Rain is likely east of the Mississippi Valley and southward from the Ohio Valley to the Golf and northern Florida, with the greatest expectation of rain along the Appalachian chain. Snow is expected along the southern sections of the Great Lakes and across the northern Plains into the upper Mississippi Valley. Rain with snow at higher elevations, will fall from the northern and central Rockies, westward to the Pacific Coast. The southern Plateau will be mostly cloudy with little or no precipitation. Temperatures will be cold except of mild air from southern Texas across the central Plains.

Almanac Data for today - Sun Rises 7:26 a.m., sets 4:55 p.m.; moon rises 10:02 p.m., sets 10:18 a.m.; Tides: high 10:58 a.m. and 11:15 p.m., low 5:33 a.m., and 5:41 p.m. High and low tides at the following locations may be obtained by subtracting the hours indicated from the tides above, Annapolis (1 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 19 for the pollutant, photochemical oxidants. Index values between zero 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 be good.

The National Weather Service forecasts the Potomac River stage at Little Falls should be near 4.3 feet today Local Temp., Humidity(TABLE) Time(COLUMN)T.(COLUMN)H. 12 midnight(COLUMN)23(COLUMN)62 1 a.m.(COLUMN)22(COLUMN)68 2 a.m.(COLUMN)22(COLUMN)68 3 a.m.(COLUMN)20(COLUMN)74 4 a.m.(COLUMN)22(COLUMN)74 5 a.m.(COLUMN)21(COLUMN)77 6 a.m.(COLUMN)19(COLUMN)74 7 a.m.(COLUMN)20(COLUMN)74 8 a.m.(COLUMN)20(COLUMN)81 9 a.m.(COLUMN)24(COLUMN)71 10 a.m.(COLUMN)77(COLUMN)63 11 a.m.(COLUMN)32(COLUMN)51 12 noon(COLUMN)37(COLUMN)39 1 p.m.(COLUMN)39(COLUMN)34 2 p.m.(COLUMN)40(COLUMN)34 3 p.m.(COLUMN)41(COLUMN)30 4 p.m.(COLUMN)40(COLUMN)37 5 p.m.(COLUMN)37(COLUMN)40 6 p.m.(COLUMN)36(COLUMN)42 7 p.m.(COLUMN)34(COLUMN)56(END TABLE) Temperatures ending 8 a.m. (EST) yesterday:(TABLE) City(COLUMN)H.(COLUMN)L. Albany(COLUMN)24(COLUMN)6 Albuquerque(COLUMN)45(COLUMN)35 Amarillo(COLUMN)46(COLUMN)33 Anchorage(COLUMN)25(COLUMN)16 Asheville(COLUMN)36(COLUMN)12 Atlanta(COLUMN)39(COLUMN)21 Atlantic City(COLUMN)26(COLUMN)19 Austin(COLUMN)49(COLUMN)44 Baltimore(COLUMN)26(COLUMN)13 Billings(COLUMN)34(COLUMN)17 Birmingham(COLUMN)40(COLUMN)21 Bismarck(COLUMN)22(COLUMN)7 Boise(COLUMN)42(COLUMN)29 Boston(COLUMN)30(COLUMN)18 Brownsville(COLUMN)82(COLUMN)63 Buffalo(COLUMN)16(COLUMN)15 Burlington(COLUMN)18(COLUMN)7 Casper(COLUMN)41(COLUMN)20 Charleston, SC(COLUMN)45(COLUMN)31 Charleston, WVa(COLUMN)25(COLUMN)22 Charlotte(COLUMN)38(COLUMN)20 Cheyenne(COLUMN)45(COLUMN)23 Chicago(COLUMN)25(COLUMN)17 Cincinnati(COLUMN)26(COLUMN)14 Cleveland(COLUMN)24(COLUMN)15 Columbia, SC(COLUMN)41(COLUMN)15 Columbus(COLUMN)24(COLUMN)15 Dal.-Ft. Worth(COLUMN)46(COLUMN)40 Dayton(COLUMN)26(COLUMN)22 Denver(COLUMN)54(COLUMN)20 Des Moines(COLUMN)32(COLUMN)20 Detroit(COLUMN)21(COLUMN)16 Duluth(COLUMN)17(COLUMN)7 El Paso(COLUMN)54(COLUMN)45 Fairbanks(COLUMN)10(COLUMN)zero Fargo(COLUMN)19(COLUMN)9 Flagstaff(COLUMN)40(COLUMN)36 Great Falls(COLUMN)33(COLUMN)12 Hartford(COLUMN)26(COLUMN)7 Helena(COLUMN)20(COLUMN)3 Honolulu(COLUMN)82(COLUMN)65 Houston(COLUMN)54(COLUMN)44 Indianpolis(COLUMN)31(COLUMN)20 Jackson, Miss.(COLUMN)39(COLUMN)30 Jacksonville(COLUMN)53(COLUMN)27 Juneau(COLUMN)34(COLUMN)20 Kansas City(COLUMN)42(COLUMN)28 Las Vegas(COLUMN)52(COLUMN)48 Little Rock(COLUMN)49(COLUMN)30 Los Angeles(COLUMN)63(COLUMN)58 Louisville(COLUMN)33(COLUMN)20 Memphis(COLUMN)42(COLUMN)23 Miami Beach(COLUMN)68(COLUMN)52 Midland-Odessa(COLUMN)49(COLUMN)31 Milwaukee(COLUMN)22(COLUMN)14 Mpls.-St. Paul(COLUMN)23(COLUMN)16 Nashville(COLUMN)36(COLUMN)19 New Orleans(COLUMN)45(COLUMN)43 New York(COLUMN)28(COLUMN)17 Norfolk(COLUMN)35(COLUMN)18 North Platte(COLUMN)47(COLUMN)12 Oklahoma City(COLUMN)52(COLUMN)35 Omaha(COLUMN)40(COLUMN)20 Orlando(COLUMN)61(COLUMN)37 Philadelphia(COLUMN)25(COLUMN)13 Phoenix(COLUMN)63(COLUMN)58 Pitokwv(COLUMN)21(COLUMN)18 Portland, Maine(COLUMN)30(COLUMN)10 Portland, Ore(COLUMN)40(COLUMN)33 Providence(COLUMN)27(COLUMN)12 Raleigh(COLUMN)36(COLUMN)14 Rapid City(COLUMN)37(COLUMN)16 Reno(COLUMN)38(COLUMN)34 Richmond(COLUMN)31(COLUMN)14 St. Pbg-Tampa(COLUMN)60(COLUMN)35 St. Louis(COLUMN)42(COLUMN)20 St. Pbg-Tampa(COLUMN)60(COLUMN)35 Salt Lake City(COLUMN)37(COLUMN)35 San Antonio(COLUMN)52(COLUMN)43 San Diego(COLUMN)67(COLUMN)63 San Francisco(COLUMN)58(COLUMN)56 San Juan(COLUMN)84(COLUMN)73 St. Ste. Marie(COLUMN)19(COLUMN)6 Seattle(COLUMN)44(COLUMN)40 Shreveport(COLUMN)45(COLUMN)35 Sioux Falls(COLUMN)25(COLUMN)5 Spokane(COLUMN)20(COLUMN)19 Syracuse(COLUMN)23(COLUMN)15 Topeka(COLUMN)45(COLUMN)15 Tuscon(COLUMN)64(COLUMN)51 Tulsa(COLUMN)51(COLUMN)29 Washington(COLUMN)27(COLUMN)18 Wichita(COLUMN)46(COLUMN)26(END TABLE) TemperaturesAbroad Yesterday(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)Temp. Aberdeen(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)46 Amsterdam(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)43 Ankara(COLUMN)clear(COLUMN)3 p.m.(COLUMN)45 Athens(COLUMN)pt. cldy(COLUMN)2 p.m.(COLUMN)63 Auckland(COLUMN)pt. cldy(COLUMN)midnight(COLUMN)63 Berlin(COLUMN)cloydt(COLUMN)1 p.m.(COLUMN)39 Birminghams(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)43 Brussel(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)41 Casablanca(COLUMN)rain(COLUMN)noon(COLUMN)50 Copenhagen(COLUMN)snow(COLUMN)1 p.m.(COLUMN)32 Dublin(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)41 Geneva(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)39 Hong Kong(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)63 Lisbon(COLUMN)cloudy(COLUMN)noon(COLUMN)41 London(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)43 Madrid(COLUMN)pt.cldy(COLUMN)1 p.m.(COLUMN)45 Maita(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)66 Manila(COLUMN)pt. cldy(COLUMN)8 p.m.(COLUMN)82 Moscow(COLUMN)snow(COLUMN)3 p.m.(COLUMN)16 New Delhi(COLUMN)clear(COLUMN)5 p.m.(COLUMN)59 Nice(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)54 Oslo(COLUMN)snow(COLUMN)1 p.m.(COLUMN)21 Paris(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)43 Peking(COLUMN)clear(COLUMN)8 p.m.(COLUMN)27 Rome(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)61 Saigon(COLUMN)clear(COLUMN)8 p.m.(COLUMN)82 Sofia(COLUMN)cloudy(COLUMN)2 p.m.(COLUMN)27 Stockholm(COLUMN)snow(COLUMN)1 p.m.(COLUMN)25 Sydney(COLUMN)clear(COLUMN)10 p.m.(COLUMN)64 Tel Aviv(COLUMN)clear(COLUMN)2 p.m.(COLUMN)64 Tokyo(COLUMN)clear(COLUMN)9 p.m.(COLUMN)54 Tunis(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)66 ViennaHclear(COLUMN)1 p.m.(COLUMN)41 Warsaw(COLUMN)rain(COLUMN)1 p.m.(COLUMN)37(END TABLE) Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)fair(COLUMN)86(COLUMN)72 Barbados(COLUMN)fair(COLUMN)79(COLUMN)76 Bermuda(COLUMN)fair(COLUMN)65(COLUMN)56 Bogota(COLUMN)pt. cldy(COLUMN)70(COLUMN)47 Calgary(COLUMN)snow(COLUMN)36(COLUMN)12 Culiacan(COLUMN)pt. cldy(COLUMN)86 68 Edmonton(COLUMN)cloudy(COLUMN)30(COLUMN)12 Havana(COLUMN)cloudy(COLUMN)68(COLUMN)63 Kingston(COLUMN)pt. cldy(COLUMN)88(COLUMN)76 Montego Bay(COLUMN)pt. cldy(COLUMN)79(COLUMN)72 Mexico City(COLUMN)haze(COLUMN)79(COLUMN)49 Monterrey(COLUMN)fair(COLUMN)70(COLUMN)56 Montreal(COLUMN)snow(COLUMN)16(COLUMN)zero Nassau(COLUMN)fair(COLUMN)74(COLUMN)58 Ottawa(COLUMN)snow(COLUMN)10(COLUMN)3 Regina(COLUMN)snow(COLUMN)19(COLUMN)16 St. Kitts(COLUMN)pt. cldy(COLUMN)86(COLUMN)72 St. Thomas(COLUMN)fair(COLUMN)84(COLUMN)70 Toronto(COLUMN)clear(COLUMN)19(COLUMN)14 Vancouver(COLUMN)rain(COLUMN)36(COLUMN)34 Veracruz(COLUMN)fair(COLUMN)70(COLUMN)65 Winnipeg(COLUMN)snow(COLUMN)12(COLUMN)-4(END TABLE)