Washington: Today - Variable cloudiness, high in low 70s, low 66 to 72. Chance of rain is 70 percent today and 60 percent tonight. Winds will be light and variable. Friday - Variable cloudiness with thunderstorms likely, high in low 70s.

Maryland and Virginia: Today - Variable cloudiness with showers likely, high in 70s in the east and 80s in the west, lows will be in the mid 60s to mid 70s. Friday - Variable cloudiness, high in 80s.

Lower Potomac and Chesapeake Bay: Today - Fair, visibility more than five miles except in rain. Winds will be northeasterly at 12 knots. Waves in unprotected waters will be one foot.

Atlantic Ocean Beaches from New Jersey to North Carolina: Today and Friday - Partly cloudy, warm and humid with a chance of thunderstorms, high in mid to upper 80s. Water temperatures will be in the mid 70s in the north and upper 70s to near 80 in the south.

Extended Area Outlook for Saturday through Monday: Partly cloudy with a chance of showers near the end of the period. Highs will average in the 80s and lows from the 60s to 70s. Normal Washington temperatures for the period will be a high of 84 and a low of 65.

West Virginia: Today - Partly cloudy with showers likely, high in the 70s to near 80, low in mid 60s. Friday - Partly cloudy with a chance of showers in east, high in 70s.

The national Weather Forecast for today - Showers and thunderstorms will extend from the lower Mississippi Valley through the Atlantic Coast states from Florida to central New England. There will be scattered thundershowers across portions of southern Texas and the central and southern Rockies. Skies will be mostly sunny from California into the central and southern Plateau, over Montana, the central and southern Plains, and across the central Great Lakes. Temperatures will be mild through the Rockies, and from the Great Lakes and Ohio Valley into the north Atlantic Coast states. Most of the remainder of the nation will have warm temperatures.

The Nation Yesterday: A low pressure system, the remnants of tropical storm Debra, was over the lower Ohio Valley region. Heavy rains continue to fall, posing flood threats through the area. Flash flood watches was in effect from southeastern Illinois and southern Indiana into central and eastern Kentucky, and in eastern Kentucky tonight. The low is moving northeast, spreading rain throughout most of the Ohio Valley. The rain expected to move through the middle and north Atlantic Coast states today. Showers and thunderstorms were also located over a section of northern California and adjacent portions of south central Oregon, the northern Rockies, the northeastern corner of South Dakota, and through parts of central and south Texas. Heavy thundershowers dumping large amounts of rain moved into the San Antonio area and a tornado touched down near Houston. A tornado and several waterspouts were spotted in the Florida panhandle.

Almanac Data for today: The sun rises 6:36 a.m., sets 7:40 p.m.; moon rises 4:40 a.m., sets 6:29 p.m. Tides: high 7:21 a.m. and 7:50 p.m., low 1:40 a.m. and 2:11. 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 Lighthouse (4 1/2), Deale, Md. (4 1/2), Colonial Beach (5 1/4), Norfolk (1), Virginia Beach (3/4), Solomons Island (6 1/4), Point Lookout (7).

Pollen Count: 20 ragweed (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 2 to 3 p.m. period was 100 for the pollutant, photochemical oxidents. Index values between 100 and 249 indicate very unhealthy 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 improve.

The National Weather service forecasts the Potomac River Stage at Little Falls should remain at 3.3 feet today. Local Temps., Humidity(TABLE) Time(COLUMN)T.(COLUMN)H. 12 mdnt(COLUMN)81(COLUMN)70 1 a.m.(COLUMN)80(COLUMN)74 2 a.m.(COLUMN)78(COLUMN)79 3 a.m.(COLUMN)80(COLUMN)74 4 a.m.(COLUMN)79(COLUMN)77 5 a.m.(COLUMN)79(COLUMN)77 6 a.m.(COLUMN)78(COLUMN)79 7 a.m.(COLUMN)78(COLUMN)79 8 a.m.(COLUMN)78(COLUMN)79 9 a.m.(COLUMN)79(COLUMN)77 10 a.m.(COLUMN)82(COLUMN)70 11 a.m.(COLUMN)82(COLUMN)70 12 noon(COLUMN)86(COLUMN)61 1 p.m.(COLUMN)88(COLUMN)58 2 p.m.(COLUMN)88(COLUMN)58 3 p.m.(COLUMN)89(COLUMN)56 4 p.m.(COLUMN)90(COLUMN)54 5 p.m.(COLUMN)89(COLUMN)56 6 p.m.(COLUMN)86(COLUMN)61 7 p.m.(COLUMN)86(COLUMN)61(END TABLE) Temperatures ending 8 a.m. (EDT) yesterday:(TABLE) City(COLUMN)H.(COLUMN)L. Albany(COLUMN)80(COLUMN)58 Albuquerque(COLUMN)85(COLUMN)55 Amarillo(COLUMN)84(COLUMN)61 Anchorage(COLUMN)61(COLUMN)53 Asheville(COLUMN)85(COLUMN)63 Atlanta(COLUMN)92(COLUMN)73 Atlantic City(COLUMN)88(COLUMN)72 Austin(COLUMN)93(COLUMN)75 Baltimore(COLUMN)93(COLUMN)73 Billings(COLUMN)79(COLUMN)50 Birmingham(COLUMN)89(COLUMN)77 Bismarck(COLUMN)82(COLUMN)47 Boise(COLUMN)86(COLUMN)62 Boston(COLUMN)90(COLUMN)68 Brownsville(COLUMN)94(COLUMN)73 Buffalo(COLUMN)77(COLUMN)57 Burlington(COLUMN)76(COLUMN)59 Casper(COLUMN)76(COLUMN)48 Charleston, S.C.(COLUMN)92(COLUMN)79 Charleston, W.Va.(COLUMN)81(COLUMN)70 Charlotte(COLUMN)93(COLUMN)71 Cheyenne(COLUMN)73(COLUMN)44 Chicago(COLUMN)80(COLUMN)63 Cincinnati(COLUMN)78(COLUMN)65 Cleveland(COLUMN)82(COLUMN)65 Columbia, S.C.(COLUMN)97(COLUMN)74 Columbus(COLUMN)81(COLUMN)56 Dal.-Ft. Worth(COLUMN)91(COLUMN)70 Dayton(COLUMN)79(COLUMN)61 Denver(COLUMN)77(COLUMN)51 Des Moines(COLUMN)81(COLUMN)59 Detroit(COLUMN)82(COLUMN)60 Duluth(COLUMN)75(COLUMN)42 El Paso(COLUMN)80(COLUMN)61 Fairbanks(COLUMN)71(COLUMN)46 Fargo(COLUMN)79(COLUMN)43 Flagstaff(COLUMN)85(COLUMN)47 Great Falls(COLUMN)78(COLUMN)51 Hartford(COLUMN)87(COLUMN)60 Helena(COLUMN)79(COLUMN)48 Honolulu(COLUMN)88(COLUMN)75 Houston(COLUMN)92(COLUMN)78 Indianapolis(COLUMN)80(COLUMN)64 Jackson, Miss.(COLUMN)82(COLUMN)71 Jacksonville(COLUMN)91(COLUMN)70 Juneau(COLUMN)60(COLUMN)52 Kansas City(COLUMN)80(COLUMN)57 Las Vegas(COLUMN)108(COLUMN)78 Little Rock(COLUMN)73(COLUMN)65 Los Angeles(COLUMN)85(COLUMN)68 Louisville(COLUMN)77(COLUMN)69 Memphis(COLUMN)78(COLUMN)71 Miami Beach(COLUMN)86(COLUMN)80 Midland-Odessa(COLUMN)81(COLUMN)66 Milwaukee(COLUMN)78(COLUMN)58 Mpls-St. Paul(COLUMN)81(COLUMN)55 Nashville(COLUMN)83(COLUMN)72 New Orleans(COLUMN)87(COLUMN)75 New York(COLUMN)89(COLUMN)71 Norfolk(COLUMN)93(COLUMN)72 North Platte(COLUMN)78(COLUMN)54 Oklahoma City(COLUMN)90(COLUMN)61 Omaha(COLUMN)79(COLUMN)68 Orlando(COLUMN)94(COLUMN)73 Philadelphia(COLUMN)91(COLUMN)74 Phoenix(COLUMN)106(COLUMN)77 Pittsburgh(COLUMN)81(COLUMN)65 Portland, Me.(COLUMN)88(COLUMN)62 Portland, Ore.(COLUMN)87(COLUMN)63 Providence(COLUMN)87(COLUMN)62 Raleigh(COLUMN)95(COLUMN)69 Rapid City(COLUMN)78(COLUMN)46 Reno(COLUMN)94(COLUMN)46 Richmond(COLUMN)98(COLUMN)70 St. Louis(COLUMN)81(COLUMN)62 St. Prbg.-Tampa(COLUMN)92(COLUMN)76 Salt Lake City(COLUMN)87(COLUMN)56 San Antonio(COLUMN)90(COLUMN)72 San Diego(COLUMN)75(COLUMN)69 San Francisco(COLUMN)63(COLUMN)55 San Juan(COLUMN)91(COLUMN)78 St. Ste. Marie(COLUMN)70(COLUMN)51 Seattle(COLUMN)80(COLUMN)63 Shreveport(COLUMN)75(COLUMN)67 Sioux Falls(COLUMN)79(COLUMN)53 Spokane(COLUMN)81(COLUMN)55 Syracuse(COLUMN)77(COLUMN)63 Topeka(COLUMN)80(COLUMN)53 Tucson(COLUMN)98(COLUMN)79 Tulsa(COLUMN)90(COLUMN)61 Washington(COLUMN)93(COLUMN)76 Wichita(COLUMN)84(COLUMN)57(END TABLE) Temperatures Abroad Yesterday(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)Temp. Aberdeen(COLUMN)rain(COLUMN)1 p.m.(COLUMN)52 Amsterdam(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)59 Athen(COLUMN)clear(COLUMN)2 p.m.(COLUMN)84 Auckland(COLUMN)cloudy(COLUMN)12 a.m.(COLUMN)54 Berlin(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)55 Birmingham(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)57 Bonn(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)59 Brussels(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)59 Casablanca(COLUMN)pt. cldy(COLUMN)12 p.m.(COLUMN)75 Copenhagen(COLUMN)clear(COLUMN)1 p.m.(COLUMN)59 Dublin(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)59 Geneva(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)56 Hong Kong(COLUMN)clear(COLUMN)8 p.m.(COLUMN)81 Jerusalem(COLUMN)clear(COLUMN)2 p.m.(COLUMN)81 Lisbon(COLUMN)pt. cldy(COLUMN)12 p.m.(COLUMN)79 London(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)63 Madrid(COLUMN)clear(COLUMN)1 p.m.(COLUMN)68 Malta(COLUMN)clear(COLUMN)1 p.m.(COLUMN)84 Manila(COLUMN)rain(COLUMN)8 p.m.(COLUMN)79 Moscow(COLUMN)cloudy(COLUMN)3 p.m.(COLUMN)61 New Delhl(COLUMN)clear(COLUMN)5 p.m.(COLUMN)91 Nice(COLUMN)clear(COLUMN)1 p.m.(COLUMN)88 0slo(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)63 Peking(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)70 Rome(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)81 Saigon(COLUMN)storm(COLUMN)8 p.m.(COLUMN)84 Sofia(COLUMN)pt. cldy(COLUMN)2 p.m.(COLUMN)75 Stockholm(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)55 Sydney(COLUMN)cloudy(COLUMN)10 p.m.(COLUMN)59 Tokyo(COLUMN)clear(COLUMN)9 p.m.(COLUMN)82 Tunis(COLUMN)clear(COLUMN)1 p.m.(COLUMN)86 Vienna(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)68 Warsaw(COLUMN)rain(COLUMN)1 p.m.(COLUMN)59(END TABLE) Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)pt. cldy(COLUMN)87(COLUMN)79 Barbados(COLUMN)pt. cldy(COLUMN)87(COLUMN)77 Bermuda(COLUMN)cloudy(COLUMN)83(COLUMN)78 Bogota(COLUMN)pt. cldy(COLUMN)64(COLUMN)50 Culiacan(COLUMN)clear(COLUMN)96(COLUMN)86 Havana(COLUMN)pt. cldy(COLUMN)90(COLUMN)74 Kingston(COLUMN)sunny(COLUMN)87(COLUMN)77 Montego Bay(COLUMN)sunny(COLUMN)90(COLUMN)73 Mexico City(COLUMN)haze(COLUMN)80(COLUMN)58 Monterrey(COLUMN)pt. cldy(COLUMN)92(COLUMN)71 Nassau(COLUMN)cloudy(COLUMN)92(COLUMN)75 St. Kitts(COLUMN)pt. cldy(COLUMN)88(COLUMN)81 St. Thomas(COLUMN)pt. cldy(COLUMN)91(COLUMN)77 Veracruz(COLUMN)cloudy(COLUMN)89(COLUMN)76(END TABLE)