Issue link: https://www.epageflip.net/i/709557
ByScottSonner The Associated Press RENO, NEV. The average surface temperature of Lake Tahoe has risen faster over the last four years than any time on record — 15 times faster than the long- term warming rate over the past half century, scientists say. Continued warm and dry conditions contributed to several record-break- ing measurements at Lake Tahoe in 2015, raising con- cerns about the ecological impacts of climate change on the second deepest lake in the United States, ac- cording to an annual report issued Thursday by the UC Davis Tahoe Environmental Research Center. "Lake Tahoe experi- enced a year like no other," according to the research center, which started keep- ing water temperature re- cords in 1970 when it aver- aged 50.3 degrees. The temperature in 2015 warmed nearly one-half of a degree from the previous year to a record 53.3 de- grees Fahrenheit, the new study says. Tahoe's surface tempera- ture slowly was increasing until it declined between 1997 and 2011, but since then it "has warmed at an alarming rate of over 0.3 F per year" — 15 times faster than the long-term average rate of .018 per year, the re- searchers said. While precipitation was near average, only 6.5 per- cent of it fell as snow in 2015, the lowest amount on record. Only 24 days had below-freezing air temper- atures, also a record, the re- port said. Over the last 100 years, the daily air temperature on the lake's northwest shore at Tahoe City, Cali- fornia has increased, with a 4.3 degree rise in the daily minimum temperature and a 2-degree increase in the daily maximum tempera- ture, the report said. Geoff Schladow, direc- tor of the research center, said scientists have been aware for some time now of the rising air temperatures around Tahoe, and more re- cently the warming of the lake itself. "What is different this year is that we are seeing more aspects of the lake's internal physics changing, and that is bound to alter the ecology," said Schladow, a professor of water re- sources and environmen- tal engineering at UC Davis. For example, Lake Tahoe's "mixing depth" last year — an important mea- surement of the intermin- gling of varying depths of water — was the shallowest ever recorded at 262 feet, the study said. Typical mixing of waters that occurs at deep levels during the winter is crit- ical to adding oxygen to the depths and distribut- ing nitrogen that tends to accumulate at the bottom, the report said. Last year, Tahoe failed to mix its full depth for the fourth year in a row, it said. Annual clarity fell 4.8 feet to 73.1 feet in 2015, due in part to warmer inflowing water. However, it was still more than 9 feet greater than the lowest recorded average of 64.1 feet in 1997, the report said. Twenty-two miles long and 12 miles wide, the lake covers 191 square miles along the California-Ne- vada line. With a maximum depth of 1,645 feet — sec- ond only to Oregon's Cra- ter Lake, its waters would cover the state of California 14 inches deep. CLIMATE CHANGE Lake Tahoe warming 15 times faster than long-term average RICHPEDRONCELLI—THEASSOCIATEDPRESSFILE A kayaker paddles along Zephyr Cove, the sight of the 19th annual Lake Tahoe Summit in south Lake Tahoe, Nev. Washington 86/74 New York 82/71 Miami 91/78 Atlanta 93/74 Detroit 80/67 Houston 94/77 Chicago 75/63 Minneapolis 80/65 Kansas City 84/67 El Paso 97/74 Denver 91/62 Billings 94/65 Los Angeles 85/67 San Francisco 71/57 Seattle 77/58 AIRQUALITYFORECAST Whatitmeans:0-50:Good; 51-100:Moderate; 101-150:Unhealthyforsensitivepeople; 151+:Unhealthyforall. Source: Airnow.gov City Today'sairquality City Hi/Lo/W Hi/Lo/W CALIFORNIA CITIES National and world forecast s-sunny,pc-partly cloudy,c-cloudy,sh-showers,t-thunderstorms,r-rain,sf-snow flurries,sn-snow,i-ice City Hi/Lo/W Hi/Lo/W Summary National Extremes World Extremes North and South America Asia, Australia Africa CarsonCity Hawthorne Reno Herlong Lovelock Sacramento Yuba City Napa Ukiah Chico Corning Lakeview Alturas Susanville Redding Red Bluff Laytonville Fort Bragg Point Arena Eureka Redway Mount Shasta Yreka Crescent City Ashland Shown is today's weather. Temperatures are today's highs and tonight's lows. Shown are today's noon positions of weather systems and precipitation. Temperature bands are highs for the day. ALMANAC Precipitation Temperatures ALLERGY REPORT Pollenlevels Source: National Allergy Bureau TODAY'S UV INDEX (The higher the number, the faster skin damage will occur.) Extreme Very high High Moderate Low SUN SETTINGS, MOON PHASES Sunrise Sunset Moonrise Moonset Hoursofsunlight River Levels SacramentoRiver Flood 7a.m. 24-hr Stage yest. chg. Lake Levels Elevation Yesterday Storage (acre-feet) Percent Capacity Q: A: SUNDAY 100° 65° MONDAY 99° 65° Sunn y and seasonably warm Sunn y and seasonably warm TUESDAY 99° 66° Mostly sunn y and wa rm WEDNESDAY 103° 67° Ho t with plenty of sun TODAY 106° 68° Mostly sunny and hot. Clear tonight. High ..................................................................... 107° Low ........................................................................ 75° Normal high ......................................................... 98° Normal low ........................................................... 65° Record high ........................................... 115° in 2003 Record low .............................................. 54° in 1985 Humidity noon today ........................................ 19% 24 hours through 2 p.m. yesterday ................. 0.00" Month to date ................................................... 0.00" Normal month to date ..................................... 0.10" Season to date ................................................ 23.37" Normal season to date .................................. 24.01" Red Bluff through 2 p.m. yesterday Chico ................................................. Unh. Sens. Grp Napa ................................................................... Good Red Bluff .............................................. Not available Redding ............................................... Not available Yuba City ................................................... Moderate Allergy, dust and dander today: Beneficial Grass ....................... Low Mold .........................Low Trees .................. Absent Weeds ..................... Low 8 Highest at 1 p.m. Today 6:05 a.m. 8:25 p.m. 3:03 a.m. 5:46 p.m. Sunday 6:06 a.m. 8:24 p.m. 3:59 a.m. 6:41 p.m. 14 hr., 20 min. Aug2 New Aug10 First Full Aug18 Last Aug24 aboveBendBridge......................27 ...........4.30 ......+0.10 atHamiltonCity.........................148 ......129.61 ......+0.01 atOrdFerry................................114 ........97.00 .......none atRedBluffDiversionDam.......253 ......239.20 .......none atTehamaBridge ......................213 ......201.90 ......+0.10 atVinaWoodsonBridge............183 ......167.68 ....... -0.02 BlackButte ....................451.98..............58,940 .....41.0% LakeOroville..................817.09.........2,390,553 .....64.0% LakeShasta .................1032.00.........3,584,283 .....78.7% LakeTrinity..................2272.11.........1,159,369 .....43.8% Whiskeytown...............1209.32............238,919 .....99.1% Weather Trivia ™ What is the driest major city in the world? Cairo, Egypt, averages only 1 inch of rain each year. Today Sunday Anaheim 88/67/s 86/66/pc Bakersfield 109/79/s 106/77/s Chula Vista 80/67/pc 80/67/pc Crescent City 62/51/pc 62/51/pc Death Valley 121/96/pc 115/94/t Eureka 65/52/pc 64/51/pc Fremont 82/58/s 81/58/s Fresno 109/75/s 105/72/s Glendale 90/67/s 87/66/s Huntington Beach 78/69/pc 77/68/pc Irvine 82/67/s 82/67/pc Lake Tahoe 85/51/s 83/49/t Long Beach 84/69/s 83/69/pc Los Angeles 85/67/s 83/67/pc Mammoth Mountain 88/52/s 87/50/t Modesto 105/67/s 100/64/s Monterey 67/54/pc 68/54/pc Moreno Valley 97/66/s 94/65/s Napa 87/53/s 85/54/s Needles 110/90/pc 107/90/t Oakland 73/59/pc 73/58/pc Oxnard 75/64/pc 75/64/pc Redding 107/71/s 101/68/s Riverside 98/68/s 94/65/s Sacramento 98/61/s 94/61/s San Bernardino 100/67/s 96/66/s San Diego 76/68/pc 77/69/pc San Francisco 71/57/pc 73/57/pc San Jose 85/60/s 83/60/s San Luis Obispo 80/57/pc 78/57/pc Santa Ana 82/69/s 81/69/pc Santa Barbara 74/61/pc 73/60/s Santa Clarita 96/63/s 92/63/s Stockton 101/62/s 95/60/s Ventura 76/63/pc 75/63/pc Yosemite Valley 98/63/s 95/61/pc Today Sunday Albuquerque 94/68/t 92/68/t Atlanta 93/74/pc 93/73/t Baltimore 86/71/t 88/71/t Boston 81/70/pc 77/68/sh Buffalo 78/66/c 79/65/t Chicago 75/63/c 79/64/pc Cincinnati 81/67/c 84/66/t Dallas 98/79/pc 98/79/s Denver 91/62/t 93/63/t Detroit 80/67/c 80/63/pc El Paso 97/74/t 97/74/t Fargo 81/64/t 85/69/pc Honolulu 87/76/pc 87/76/pc Houston 94/77/pc 94/77/t Indianapolis 83/67/pc 83/67/pc Kansas City 84/67/pc 85/73/c Las Vegas 109/87/pc 106/85/t Louisville 85/71/c 87/70/pc Miami 91/78/pc 89/79/t Minneapolis 80/65/pc 84/68/pc New Orleans 92/79/t 91/79/t New York City 82/71/t 80/71/t Oklahoma City 91/72/pc 96/74/s While dry weather is in store for much of New England and upstate New York today, showers and thunderstorms will move eastward and ramp up over the southern Appalachians and the mid- Atlantic region. Some of the storms can be severe with strong winds and flash flooding. While spotty heavy storms will affect Florida's west coast, a more general area of showers and thunderstorms will extend from parts of the central Plains to the northwestern Gulf Coast. The upper Great Lakes and northern Plains can expect a dry day. Storms will fire over the Four Corners. High ........................... 115° in Needles, CA Low ............................... 35° in Walden, CO High ........................... 119° in Basrah, Iraq Low ...... 1° in Summit Station, Greenland Bogota 63/47/pc 64/49/pc Buenos Aires 59/52/pc 62/44/r Caracas 88/76/pc 87/76/pc Ensenada 84/67/pc 83/66/pc Mexico City 73/55/t 72/53/t Montreal 79/62/pc 80/62/pc Rio de Janeiro 78/68/pc 79/65/s Tijuana 82/67/pc 82/67/pc Toronto 78/63/c 75/62/r Vancouver 73/57/s 73/56/s Orlando 94/76/t 93/75/t Philadelphia 85/73/t 85/74/t Phoenix 104/86/t 98/85/t Pittsburgh 81/67/t 82/66/pc Portland, ME 82/62/s 77/62/sh Portland, OR 80/59/pc 79/58/pc St. Louis 87/69/pc 88/73/pc Salt Lake City 100/76/pc 98/75/pc Seattle 77/58/pc 76/57/pc Tucson 97/78/t 91/76/t Washington, DC 86/74/t 90/76/t Cairo 97/76/s 97/78/s Casablanca 84/72/pc 85/69/pc Johannesburg 63/40/s 66/39/s Kinshasa 85/66/pc 86/67/pc Lagos 83/76/c 82/75/t Nairobi 77/52/pc 79/52/s Tripoli 93/67/s 93/69/s Baghdad 115/81/s 116/85/s Beijing 88/76/t 91/75/t Hong Kong 97/84/pc 93/83/t Jerusalem 88/69/s 88/72/s Kabul 92/62/s 91/61/s Manila 89/79/t 88/80/t Melbourne 58/50/c 60/49/s New Delhi 88/80/t 90/80/t Seoul 87/76/c 87/75/pc Singapore 87/76/pc 87/78/c Sydney 66/50/s 69/49/s Tehran 94/71/s 98/73/s Tokyo 87/75/pc 87/75/pc Amsterdam 70/55/sh 68/55/sh Athens 94/79/s 95/76/s Belgrade 87/66/s 91/69/s Berlin 76/57/pc 75/57/sh Budapest 86/65/s 89/65/pc Dublin 65/50/sh 65/51/sh London 74/57/pc 71/55/pc Madrid 97/67/pc 95/66/s Moscow 84/64/pc 80/62/t Paris 76/59/s 76/54/pc Rome 86/68/s 87/70/s Stockholm 77/55/t 74/53/sh Vienna 88/66/pc 88/64/t Zurich 84/60/pc 74/56/t 96/56 100/63 100/66 100/65 103/60 98/61 106/63 87/53 102/55 105/66 106/66 93/53 97/51 97/59 107/71 106/68 96/62 69/52 72/52 65/52 91/56 98/57 99/60 62/51 95/56 Forecasts and graphics provided by AccuWeather, Inc. ©2016 525AntelopeBlvd, Red Bluff (530) 527-5272 Mon.–Fri.8am-5pm Saturday by appointment Locally owned & operated FULLSERVICE TIRE SHOP 9 locations throughout California & Oregon 25yearsprofessional experience. 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