Washington: Today - Partly cloudy, high in the upper 90s, low in the upper 70s. The chance of rain is 30 per cent today and 10 per cent tonight. Thursday - Partly cloudy, high in the upper 90s. There is a chance of afternoon or evening thundershowers on each day.

Maryland and Virginia: Today - Partly cloudy, highs in the 90s, lows from the mid 60s to the mid [WORD ILLEGIBLE] Thursday - Partly cloudy, highs in the 90s. There is a chance of afternoon or evening thundershowers on each day.

Lower Potomac and Chesapeake Bay: Today - Fair with a chance of thundershowers in the afternoon or evening. Wind will be from the north at less than 12 knots today, but shifting from the southwest tonight. Visibility will be more than 5 miles, except in thundershowers. Waves in unprotected waters will be near 1 foot.

Atlantic Ocean Beaches from Cape May to Cape Hatteras: Today - Partly cloudy, highs from near 80 to near 90 Thursday - Partly cloudy, highs ranging from near 80 to near 90. There is a chance of thundershowers on each day. Water temperatures will range from the upper 60s in the north to the upper 70s in the south.

Extended Areas Forecast for Friday through Sunday: Hot and humid through the period. There is a chance of afternoon or evening thundershowers on each day. Highs will range from the 80s in the mountains and at the shore, to the [WORD ILLEGIBLE] elsewhere. Lows will be from the mid 60s to the mid 70s. Normal Washington temperatures for the period area high of 88 and a low of 69.

West Virginia: Today - Partly cloudy, chance of thundershowers, highs from the mid 80s to the low [WORD ILLEGIBLE] lows from the mid 60s to the low 70s.Thursday - Partly cloudy, highs from the mid 80s to the low [WORD ILLEGIBLE]

The National Weather Forecast for today - Thundershowers and showers will scatter from the upper Great Lakes across the upper Ohio valley into Virginia and Maryland, while other showers will scatter along the Gulf coast, Florida and through the southeast. Cool to mild temperatures will be found in Northern New England and across the northern half of the intermountain region of the west. The rest of the nation will be warm to hot with very hot readings in the northern portion of the middle Mississippi valley. Readings of 95 degrees or higher will cover a large portion of the middle of the nation as well as the southeast. Skies will generally be sunny to party cloudy.

Almanac Data for 7-6-77: Sun rises 5:50 a.m., sets 8:36 p.m.; Moon rises 11:23.Tides: High 1:35, and 6:57 low 12:06. High and low tides at the following conditions can be obtained by substracting the hours indicated [WORD ILLEGIBLE] the tides above. Annapolis [WORD ILLEGIBLE] ; Bloody Point Lighthouse (4 1/4); Deale, md. (4 1/2); Colonial Beach (6); Norfolk (1 1/2); Virginia Beach (1); Slomons 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 110 for the pollutant, photochemical oxidants. When the index exceeds 100 the air becomes hazardous and persons with lung, heart and eye problems should restrict their activity. A pollution alert has been issued.

The National Weather Service forecasts that the Potomac River stage at Little Falls will be near 2.8 feet. Local Temp., Humidity(TABLE) Time(COLUMN)T.(COLUMN)H. 12 mid.(COLUMN)84(COLUMN)59 1 a.m.(COLUMN)83(COLUMN)61 2 a.m.(COLUMN)81(COLUMN)63 3 a.m.(COLUMN)79(COLUMN)69 4 a.m.(COLUMN)79(COLUMN)69 5 a.m.(COLUMN)77(COLUMN)74 6 a.m.(COLUMN)77(COLUMN)7 7 a.m.(COLUMN)78(COLUMN)77 8 a.m.(COLUMN)82(COLUMN)67 9 a.m.(COLUMN)85(COLUMN)61 10 a.m.(COLUMN)87(COLUMN)59 11 a.m.(COLUMN)88(COLUMN)57 12 noon(COLUMN)89(COLUMN)58 1 p.m.(COLUMN)91(COLUMN)54 2 p.m.(COLUMN)94(COLUMN)49 3 p.m.(COLUMN)96(COLUMN)48 4 p.m.(COLUMN)96(COLUMN)48 5 p.m.(COLUMN)97(COLUMN)47 6 p.m.(COLUMN)97(COLUMN)45 7 p.m.(COLUMN)96(COLUMN)46(END TABLE) Temperatures ending 8 a.m. (EDT) Yesterday(TABLE) City (COLUMN)H.(COLUMN)L. Albany(COLUMN)86(COLUMN)68 Albuquerque(COLUMN)90(COLUMN)61 Amarillo(COLUMN)91(COLUMN)68 Anchorage(COLUMN)69(COLUMN)55 Asheville(COLUMN)87(COLUMN)64 Attar(COLUMN)90(COLUMN)71 Atlantic City(COLUMN)75(COLUMN)70 Austin(COLUMN)97(COLUMN)73 Baltimore(COLUMN)92(COLUMN)70 Billings(COLUMN)83(COLUMN)57 Birmingham(COLUMN)9(COLUMN)72 Bismarck(COLUMN)89(COLUMN)63 Boise(COLUMN)77(COLUMN)45 Boston(COLUMN)88(COLUMN)72 Brownsville(COLUMN)93(COLUMN)74 Buffalo(COLUMN)80(COLUMN)71 Burlington(COLUMN)79(COLUMN)62 Casper(COLUMN)83(COLUMN)58 Charleston, S.C.(COLUMN)86(COLUMN)76 Charlestn, W.Va.(COLUMN)86(COLUMN)70 Charlotte(COLUMN)91(COLUMN)71 Cheyenne(COLUMN)90(COLUMN)59 Chicago(COLUMN)96(COLUMN)77 Cincinnati(COLUMN)88(COLUMN)71 Cleveland(COLUMN)85(COLUMN)69 Columbia, S.C.(COLUMN)95(COLUMN)70 Columbus(COLUMN)85(COLUMN)73 Dal. Ft. Worth(COLUMN)99(COLUMN)75 Dayton(COLUMN)92(COLUMN)75 Denver(COLUMN)97(COLUMN)63 Des Moines(COLUMN)102(COLUMN)77 Detroit(COLUMN)90(COLUMN)71 Duluth(COLUMN)76(COLUMN)58 El Paso(COLUMN)94(COLUMN)65 Fairbanks(COLUMN)62(COLUMN)47 Fargo(COLUMN)84(COLUMN)70 Flagstaff(COLUMN)73(COLUMN)47 Great Falls(COLUMN)76(COLUMN)50 Hartford(COLUMN)90(COLUMN)67 Helena(COLUMN)65(COLUMN)47 Honolulu(COLUMN)87(COLUMN)75 Houston(COLUMN)94(COLUMN)80 Indianapolis(COLUMN)92(COLUMN)72 Jackson, Miss.(COLUMN)96(COLUMN)71 Jacksonville(COLUMN)91(COLUMN)69 Juneau(COLUMN)63(COLUMN)47 Kansas City(COLUMN)94(COLUMN)76 Las Vegas(COLUMN)100(COLUMN)74 Little Rock(COLUMN)97(COLUMN)77 Los Angeles(COLUMN)78(COLUMN)64 ouisville(COLUMN)92(COLUMN)74 Memphis(COLUMN)95(COLUMN)78 Miami Beach(COLUMN)85(COLUMN)82 Midland-Odessa(COLUMN)95(COLUMN)69 Milwaukee(COLUMN)93(COLUMN)65 Mpls. St. Paul(COLUMN)92(COLUMN)75 Nashville(COLUMN)92(COLUMN)68 New Orleans(COLUMN)93(COLUMN)75 New York(COLUMN)89(COLUMN)73 Norfolk(COLUMN)92(COLUMN)73 North Platte(COLUMN)99(COLUMN)69 Oklahoma City(COLUMN)91(COLUMN)73 Omaha(COLUMN)98(COLUMN)75 Orlando(COLUMN)88(COLUMN)71 Philadelphia(COLUMN)84(COLUMN)68 Phoenix(COLUMN)102(COLUMN)81 Pittsburgh(COLUMN)80(COLUMN)68 Portland, Maine(COLUMN)75(COLUMN)56 Portland, Ore.(COLUMN)63(COLUMN)49 Providence(COLUMN)85(COLUMN)65 Raleigh(COLUMN)92(COLUMN)71 Rapid City(COLUMN)97(COLUMN)66 Reno(COLUMN)79(COLUMN)39 Richmond(COLUMN)96(COLUMN)69 St. Louis(COLUMN)96(COLUMN)75 St. Prbg. Tampa(COLUMN)91(COLUMN)70 Salt Lake City(COLUMN)82(COLUMN)56 San Antonio(COLUMN)92(COLUMN)76 San Diego(COLUMN)71(COLUMN)63 San Francisco(COLUMN)59(COLUMN)52 San Juan(COLUMN)88(COLUMN)78 St. Ste Marie(COLUMN)84(COLUMN)57 Seattle(COLUMN)69(COLUMN)52 Shreveport(COLUMN)99(COLUMN)71 Sioux Falls(COLUMN)101(COLUMN)78 Spokane(COLUMN)62(COLUMN)42 Syracuse(COLUMN)85(COLUMN)65 Topeka(COLUMN)91(COLUMN)71 Tucson(COLUMN)97(COLUMN)80 Tulsa(COLUMN)95(COLUMN)74 Washington(COLUMN)94(COLUMN)76 Wichita(COLUMN)98(COLUMN)76(END TABLE) Temperatures Abroad Yesterday(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)Temp. Aberdeen(COLUMN)clear(COLUMN)1 p.m.(COLUMN)70 Amsterdam(COLUMN)clear(COLUMN)1 p.m.(COLUMN)75 Ankara(COLUMN)clear(COLUMN)3 p.m.(COLUMN)81 Athens(COLUMN)clear(COLUMN)2 p.m.(COLUMN)81 Auckland(COLUMN)cldy.(COLUMN)midnight(COLUMN)48 Berlin(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)73 Birmingham(COLUMN)clear(COLUMN)1 p.m.(COLUMN)75 Brussels(COLUMN)clear(COLUMN)1 p.m.(COLUMN)77 Cairo(COLUMN)clear(COLUMN)2 p.m.(COLUMN)91 Casablanca(COLUMN)clear(COLUMN)noon(COLUMN)73 C'p'nhagen(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)72 Dublin(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)68 Geneva(COLUMN)clear(COLUMN)1 p.m.(COLUMN)72 Hong Kong(COLUMN)rain(COLUMN)8 p.m.(COLUMN)79 Lisbon(COLUMN)cloudy(COLUMN)noon(COLUMN)72 London(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)79 Madrid(COLUMN)clear(COLUMN)1 p.m.(COLUMN)84 Malta(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)81 Manila(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)88 Moscow(COLUMN)cloudy(COLUMN)3 p.m.(COLUMN)66 New Delhi(COLUMN)cloudy(COLUMN)5 p.m.(COLUMN)82 Nice(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)73 Oslo(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)82 Paris(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)84 Peking(COLUMN)rain(COLUMN)8 p.m.(COLUMN)72 Rome(COLUMN)clear(COLUMN)1 p.m.(COLUMN)81 Saigon(COLUMN)rain(COLUMN)8 p.m.(COLUMN)77 Sofia(COLUMN)pt. cldy.(COLUMN)2 p.m.(COLUMN)79 Stockholm(COLUMN)rain(COLUMN)1 p.m.(COLUMN)66 (COLUMN)Sydney(COLUMN)pt. cldy.(COLUMN)10 p.m. 55 Tel Aviv(COLUMN)clear(COLUMN)2 p.m.(COLUMN)86 Tokyo(COLUMN)cloudy(COLUMN)9 p.m.(COLUMN)75 Tunis(COLUMN)clear(COLUMN)1 p.m.(COLUMN)86 Vienna(COLUMN)clear(COLUMN)1 p.m.(COLUMN)77 Warsaw(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)64(END TABLE) Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)pt. cldy.(COLUMN)89(COLUMN)76 Barbados(COLUMN)pt. cldy.(COLUMN)86(COLUMN)72 Bermuda(COLUMN)pt. cldy(COLUMN)84(COLUMN)77 Bogata(COLUMN)pt. cldy(COLUMN)64(COLUMN)50 Calgary(COLUMN)pt. cldy.(COLUMN)70(COLUMN)46 Culiacan(COLUMN)clear(COLUMN)95(COLUMN)74 Edmonton(COLUMN)rain(COLUMN)70(COLUMN)50 Havana(COLUMN)pt. cldy.(COLUMN)88(COLUMN)75 Kingston(COLUMN)clear(COLUMN)90(COLUMN)76 Montego Bay(COLUMN)clear(COLUMN)90(COLUMN)76 Mexico City(COLUMN)clear(COLUMN)91(COLUMN)79 Monterrey(COLUMN)pt. cldy.(COLUMN)95(COLUMN)72 Montreal(COLUMN)cloudy(COLUMN)73(COLUMN)63 Nassau(COLUMN)rain(COLUMN)90(COLUMN)74 Ottawa(COLUMN)pt cldy.(COLUMN)79(COLUMN)66 Regina(COLUMN)rain(COLUMN)86(COLUMN)57 St. Kitts(COLUMN)pt. cldy.(COLUMN)89(COLUMN)74 St. Thomas(COLUMN)pt. cldy.(COLUMN)90(COLUMN)78 Toronto(COLUMN)cloudy.(COLUMN)86(COLUMN)70 Vancouver(COLUMN)cloudy(COLUMN)63(COLUMN)52 Veracruz(COLUMN)pt. cloudy.(COLUMN)86(COLUMN)72 Winnepeg(COLUMN)cloudy(COLUMN)81(COLUMN)66(END TABLE)