Washington: Today - Partly cloudy rain likely by tonight, high near 40, low in the mid 30s. The chance of rain is 10 per cent today, and 60 per cent tonight. Monday - Rain ending, high near 40.

Maryland and Virginia: Partly cloudy, highs in the 40s, lows from the upper 20s to the low 30s. There is a chance of snow tonight in the mountains, with rain or snow likely elsewhere. Monday - Precipitation ending, highs from the 30s to the near 40.

Lower Potomac and Chesapeake Bay: Today - Rain, with visibility of more than 5 miles, except less than 3 miles in precipitation. Wind will be from the northeast at from 6 to 12 knots today, shifting to from the southeast at from 10 to 18 knots tonight. Waves in unprotected waters will be from 1 to 2 feet.

Extended Area Forecast for Tuesday through Thursday: Fair on Tuesday, chance of snow by Thursday. Highs will be from the 30s to the low 40s, lows from the 20s to the low 30s. Temperatures will be up to 10 degrees colder in the mountains. Normal Washington temperatures for the period are a high 43 and a low of 28.

West Virginia: Today - Cloudy, chance of precipitation, highs from the 30s to the mid 40s, lows in the 20s. Monday - Snow, highs from the mid 20s to the mid 30s.

The National Weather Forecast for today - Rain will scatter over California and Southern Oregon while snow flurries will extend over the central Rockies. Snow will reach from eastern portions of the upper half of the Mississippi Valley, across the Ohio Valley, the Great Lakes and New England. Rain will fall from southeastern New England, along the Atlantic Coast into southern Florida then through the Gulf coast into eastern portions of the lower half of the Mississippi Valley. Temperatures will be cold over the nation, but very cold from the Missouri Valley and central Plains into upper portions of the southern Plains.

The National Weather Service forecasts the Potomac River stage at Little Falls should be near 4 feet today. Local Temp., Humidity(TABLE) Time(COLUMN)T.(COLUMN)H. 12 mid.(COLUMN)37(COLUMN)89 1 a.m.(COLUMN)37(COLUMN)89 2 a.m.(COLUMN)37(COLUMN)89 3 a.m.(COLUMN)37(COLUMN)89 4 a.m.(COLUMN)37(COLUMN)89 5 a.m.(COLUMN)37(COLUMN)89 6 a.m.(COLUMN)38(COLUMN)86 7 a.m.(COLUMN)39(COLUMN)82 8 a.m.(COLUMN)39(COLUMN)82 9 a.m.(COLUMN)40(COLUMN)73 10 a.m.(COLUMN)42(COLUMN)45 11 a.m.(COLUMN)43(COLUMN)61 12 noon(COLUMN)45(COLUMN)66 1 p.m.(COLUMN)46(COLUMN)56 2 p.m.(COLUMN)47(COLUMN)52 3 p.m.(COLUMN)49(COLUMN)46 4 p.m.(COLUMN)46(COLUMN)51 5 p.m.(COLUMN)44(COLUMN)55 6 p.m.(COLUMN)43(COLUMN)55(END TABLE) Temperatures ending 8 a.m. (EST) yesterday:(TABLE) City(COLUMN)H.(COLUMN)L. Albany(COLUMN)39(COLUMN)30 Albuquerque(COLUMN)53(COLUMN)37 Amarillo(COLUMN)41(COLUMN)31 Anchorage(COLUMN)22(COLUMN)12 Asheville(COLUMN)35(COLUMN)32 Atlanta(COLUMN)36(COLUMN)35 Atlantic City(COLUMN)50(COLUMN)36 Austin(COLUMN)55(COLUMN)49 Baltimore(COLUMN)46(COLUMN)34 Billings(COLUMN)19(COLUMN)1 Birmingham(COLUMN)44(COLUMN)42 Bismarck(COLUMN)14(COLUMN)-4 Boise(COLUMN)39(COLUMN)25 Boston(COLUMN)45(COLUMN)38 Brownsville(COLUMN)72(COLUMN)67 Buffalo(COLUMN)33(COLUMN)28 Burlington(COLUMN)28(COLUMN)15 Casper(COLUMN)42(COLUMN)5 Charleston, S.C.(COLUMN)57(COLUMN)40 Charleston, W. Va.(COLUMN)44(COLUMN)35 Charlotte(COLUMN)39(COLUMN)38 Cheyenne(COLUMN)44(COLUMN)11 Chicago(COLUMN)36(COLUMN)26 Cincinnati(COLUMN)39(COLUMN)33 Cleveland(COLUMN)38(COLUMN)30 Columbia, S.C.(COLUMN)40(COLUMN)38 Columbus(COLUMN)38(COLUMN)21 Dal.-Ft. Worth(COLUMN)45(COLUMN)41 Dayton(COLUMN)42(COLUMN)33 Denver(COLUMN)54(COLUMN)24 Des Moines(COLUMN)30(COLUMN)20 Detroit(COLUMN)33(COLUMN)27 Duluth(COLUMN)13(COLUMN)2 El Paso(COLUMN)61(COLUMN)43 Fairbanks(COLUMN)18(COLUMN)8 Fargo(COLUMN)5(COLUMN)-4 Flagstaff(COLUMN)43(COLUMN)34 Great Falls(COLUMN)13(COLUMN)-12 Hartford(COLUMN)43(COLUMN)26 Helena(COLUMN)23(COLUMN)-4 Houston(COLUMN)52(COLUMN)50 Indianapolis(COLUMN)42(COLUMN)34 Jackson, Miss.(COLUMN)50(COLUMN)43 Jacksonville(COLUMN)62(COLUMN)60 Juneau(COLUMN)23(COLUMN)12 Kansas City(COLUMN)43(COLUMN)32 Las Vegas(COLUMN)64(COLUMN)44 Little Rock(COLUMN)43(COLUMN)37 Los Angeles(COLUMN)66(COLUMN)55 Louisville(COLUMN)39(COLUMN)37 Memphis(COLUMN)45(COLUMN)42 Miami Beach(COLUMN)77(COLUMN)68 Midland Odessa(COLUMN)66(COLUMN)40 Milwaukee(COLUMN)28(COLUMN)26 Mpls.- St. Paul(COLUMN)25(COLUMN)15 Nashville(COLUMN)41(COLUMN)38 New Orleans(COLUMN)62(COLUMN)48 New York(COLUMN)44(COLUMN)35 Norfolk(COLUMN)43(COLUMN)40 North Platte(COLUMN)38(COLUMN)12 Oklahoma City(COLUMN)43(COLUMN)38 Omaha(COLUMN)34(COLUMN)25 Orlando(COLUMN)67(COLUMN)61 Philadelphia(COLUMN)43(COLUMN)34 Phoenix(COLUMN)69(COLUMN)53 Pittsburgh(COLUMN)42(COLUMN)30 Portland, Maine(COLUMN)35(COLUMN)24 Portland, Ore.(COLUMN)40(COLUMN)34 Providence(COLUMN)45(COLUMN)35 Raleigh(COLUMN)40(COLUMN)36 Rapid City(COLUMN)19(COLUMN)-1 Reno(COLUMN)46(COLUMN)24 Richmond(COLUMN)39(COLUMN)35 St. Louis(COLUMN)41(COLUMN)34 St. Prbg.-Tampa(COLUMN)69(COLUMN)60 Salt Lake City(COLUMN)49(COLUMN)30 San Antonio(COLUMN)70(COLUMN)51 San Diego(COLUMN)68(COLUMN)59 San Francisco(COLUMN)56(COLUMN)49 San Juan(COLUMN)84(COLUMN)75 St. Ste. Marie(COLUMN)20(COLUMN)8 Seattle(COLUMN)41(COLUMN)30 Shreveport(COLUMN)46(COLUMN)41 Sioux Falls(COLUMN)22(COLUMN)14 Spokane(COLUMN)25(COLUMN)1 Syracuse(COLUMN)36(COLUMN)29 Topeka(COLUMN)43(COLUMN)32 Tucson(COLUMN)65(COLUMN)42 Tulsa(COLUMN)42(COLUMN)40 Washington(COLUMN)45(COLUMN)35 Wichita(COLUMN)44(COLUMN)37(END TABLE) Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)fair(COLUMN)84(COLUMN)71 Barbados(COLUMN)fair(COLUMN)82(COLUMN)71 Bermuda(COLUMN)pt. cldy(COLUMN)67(COLUMN)62 Bogota(COLUMN)clear(COLUMN)68(COLUMN)48 Calgary(COLUMN)clear(COLUMN)7(COLUMN)-17 Edmonton(COLUMN)clear(COLUMN)9(COLUMN)-2 Havana(COLUMN)pt. cldy(COLUMN)82(COLUMN)70 Kingston(COLUMN)pt. cldy(COLUMN)81(COLUMN)75 Montego Bay(COLUMN)fair(COLUMN)82(COLUMN)73 Mexico City(COLUMN)haze(COLUMN)77(COLUMN)46 Monterry(COLUMN)cloudy(COLUMN)82(COLUMN)63 Montreal(COLUMN)clear(COLUMN)19(COLUMN)5 Nassau(COLUMN)pt. cldy(COLUMN)77(COLUMN)61 Ottawa(COLUMN)clear(COLUMN)19(COLUMN)1 Regina(COLUMN)snow(COLUMN)-11(COLUMN)-20 St. Kitts(COLUMN)pt. cldy(COLUMN)84(COLUMN)72 Vancouver(COLUMN)clear(COLUMN)41(COLUMN)23 Veracruz(COLUMN)cloudy(COLUMN)84(COLUMN)66 Winnipeg(COLUMN)cloudy(COLUMN)-4(COLUMN)-18(END TABLE)