Antelope Valley Severe Watches & Warnings NOAA Weather Radio

Record Report
Statement as of 6:10 PM PDT on September 22, 2014

...Recent record high minimum temperatures across southwestern California...

Date location low temp old record

09/18 Palmdale ap 69 68 set in 1992 and 1975

09/19 camalrillo ap 66 (tied) 66 set in 1984

09/20 Paso Robles ap 58 (tied) 58 set in 2010 and 1984

Public Information Statement
Statement as of 6:25 am PDT on September 23, 2014

...Southwestern California weather summary for August 2014...

Measurable rain fell across much of the region in August 2014. What measurable rain did fall occurred mostly in the form of scattered monsoonal showers and isolated thunderstorms. Some locally heavy rainfall was recorded across portions of Los Angeles County. Typically in August...as in July...monthly rainfall across the region averages one tenth of an inch or less in most areas.

Temperatures in August 2014 were generally within a degree or two of normal across most of the region.

Daily temperature and precipitation records are listed at the end of this statement. Some of the more significant weather events of the month are listed immediately below.

A large mass of monsoonal moisture surged into the region from the southeast on the 2nd and 3rd...bringing numerous showers and scattered thunderstorms to the forecast area from the evening of the 2nd into the evening of the 3rd.

Just after 3 PM PDT on the 3rd...a cluster of strong thunderstorms developed over the eastern San Gabriel Mountains. These storms brought very heavy rainfall and some small hail to the eastern mountains. Torrential downpours were reported in Falling Springs...Crystal Lake...at Mount Baldy and at Big Pine with these thunderstorms. Doppler radar estimated rainfall rates in excess of 2 inches per hour.

The thunderstorms in the San Gabriel Mountains produced extremely impressive rainfall rates and total rainfall. An automated rain gauge at Mount Baldy reported a storm total of 4.68 inches...while a gauge at san Antonino-Sierra reported 3.74 inches. Much of that rainfall occurred in a couple of hours...and peak rainfall rates in excess of 3 inches per hour were observed. In fact...the peak rainfall observed in one hour was 3.98 inches at The Mount Baldy fire station. This rainfall was so intense that it was determined to be a once in nearly 500 year event for this location!

At 420 PM PDT...flash flooding caused a debris flow across Highway 39 and Crystal Lake canyons. Roads were temporarily closed for cleanup.

At 440 PM PDT...debris flow due to flash flooding occurred at Cattle Canyon and East Fork Road west of Mount Baldy. A car was was caught in this debris flow.

The storm also sent flash flooding to the area around Mount Baldy Road and Bear Canyon drive in Mount Baldy. A car was swept away by these flood waters which unfortunately led to one fatality.

Around 450 PM PDT...a propane tank was caught in a debris flow... caught fire...and was swept down Mount Baldy Road. In addition... the California Highway patrol had reported some flooding with rock and mudslides along highways 2 and 39. Angeles National Forest officials reported numerous other instances of flash flooding and debris flows across the eastern San Gabriel Mountains.

A strong thunderstorm drifted off the mountains into the city of Claremont in the San Gabriel valley after 4 PM PDT...bringing very heavy rainfall and some local flooding on portions of the 210 freeway. Additional thunderstorms developed in the Santa Clarita valley and northern portions of the San Fernando Valley around 6 PM PDT.

Rainfall totals on the 2nd into the 3rd included 4.68 inches at Mount Baldy...3.74 inches at San Antonio-Sierra...2.36 inches in Claremont...2.09 inches at Crystal Lake...0.79 inches at San Antonio dam...0.63 inches at Santa Anita dam...0.59 inches at San Gabriel dam...0.49 inches at Tanbark...0.41 inches at chuchupate...0.39 inches at Alamo Mountain...0.30 inches at Valyermo...0.23 inches in Lockwood Valley...0.17 inches at Ortega Hill...0.16 inches at Sandberg and Pacoima dam...0.13 inches at chilao...0.12 inches at Mill Creek Summit and at Old Man Mountain...0.11 inches in Rose Valley...0.10 inches at Warm Springs...0.09 inches at Santa Fe dam and in South Gate...0.08 inches in La Verne...at opids Camp...at Saddleback Butte...at Nordhoff Ridge...at Apache Canyon...in Hungry Valley...and at White Ledge Peak...0.07 inches in Torrance...in Piru...and at Long Beach Airport...0.05 inches in Carpinteria...in Redondo Beach...at Matilija dam...and in Ojai...0.04 inches in downtown Los Angeles...at Hawthorne Airport...at Palmdale Airport...at Burbank Airport...at Van Nuys Airport and in Northridge...0.03 inches at Los Angeles Airport...in Pomona and in Beverly Hills...0.02 inches in Ventura...and 0.01 inches in Saugus and at Woodland Hills.

Tranquil weather followed for most of the rest of the month...and temperatures were generally above normal.

On the 21st...isolated showers and thunderstorms affected eastern portions of the San Gabriel Mountains and Antelope Valley. These storms produced locally heavy downpours...but no significant flooding was reported.

Long period swell associated with Hurricane Lowell in the eastern Pacific affected south facing beaches of Los Angeles and Ventura counties from the 22nd into the morning of the 24th. Widespread surf of 5 to 7 feet was reported on south facing beaches. Sets of 10 feet were reported at Zuma beach...with sets of 10 to 13 feet at Port Hueneme. Strong rip currents were observed at many beaches.

Surf began to subside across the region during the afternoon of the 24th into the 25th. However...the largest southerly surf event in over 15 years was about to unfold across the beaches of Los Angeles and Ventura counties.

Hurricane Marie intensified rapidly into a category 5 hurricane about 500 miles southwest of Cabo San Lucas on the 24th...and tracked northwestward through the 27th...all the while weakening...reaching tropical storm status late on the 27th.

The large and powerful storm generated large and long period swell which was aimed right at Southern California. It brought the largest hurricane generated summertime swell to south facing beaches of Los Angeles and Ventura counties since 1997.

High surf began to affect south facing beaches of Los Angeles... Ventura and southeastern Santa Barbara counties on Tuesday the 26th. During the afternoon on the 26th...Los Angeles County lifeguards reported maximum sets to 10 feet...while lifeguards at Port Hueneme beaches in Ventura County reported surf of 8 to 10 feet. The surf damaged pier pilings on Malibu pier...forcing its closure. Surf continued to build during the evening of the 26th...with Max sets of 10 to 15 feet reported.

Tragically...one person drowned near Malibu after large surf caused him to strike a rock which knocked him unconscious.

The surf peaked on beaches south of Point Conception on the 27th...with maximum sets of 15 to 20 feet on exposed south facing beaches.

Surf of 12 to 15 feet with sets to 20 feet were reported at Port Hueneme. This caused 7 pilings on Port Hueneme pier to fail. At Venice Beach...surf of 6 to 10 feet with local sets to 12 feet were reported. Lifeguards at Zuma beach and at Cabrillo Beach reported surf of 10 feet with sets to 12 feet.

Even on the Santa Barbara County South Coast...partially protected by The Channel islands...some rather high surf was reported. Surf reached 4 to 6 feet at Carpinteria State Beach...with local sets to 8 feet.

In Avalon Harbor...many dry-docked boats were knocked off their stands. Large surf overturned several boats and multiple water rescues were needed. At Whites Landing...a pier was partially damaged. At Pebbly Beach...boats as large as 25 feet were tossed onshore into vehicles and buildings including a boatyard. Boulders weighing as much as 3000 pounds were also deposited onshore. Damage across the island was estimated to be between 3 million and 5 million dollars.

Significant beach erosion was reported on many beaches and minor coastal flooding was reported in some areas. Significant damage was reported in the middle breakwater at Long Beach...forcing the Army corps of engineers to inspect the damage. Along the breakwater...3 areas were completely gouged out by the surf...while 5 other areas sustained significant damage. Several hundred tons of rock were estimated to have been dislodged by the surf. Debris from the Navy mole breakwater damaged Nimitz Road near sea launch in Long Beach. The Army corps estimated that it could cost 10 million dollars to repair and place the damaged breakwaters. Damage at the Port of Long Beach itself was estimated at over 1 million dollars. The surf was large enough to force two cargo terminals at the Port of Long Beach to postpone vessel operations for a day due to safety concerns.

In Ventura County...at Sycamore Cove in Point Mugu State Park... the historic Cove house built in the 1950s and later converted into a lifeguard station was destroyed. Coastal flooding cut off access to a campground and some Cabins. People staying there had already been asked to leave by officials.

The surf began to subside late on the 28th and on the 29th...but dangerous rip currents persisted on many area beaches through the 30th.

Gusty northwest to north winds affected the Santa Ynez range... the mountains of Los Angeles and Ventura counties...and the adjacent foothills on the 30th. Peak wind gusts included 44 mph at Poppy Park...43 mph at Warm Springs...42 mph at Whitaker Peak and at Saugus...and 37 mph at Camp Nine and Sandberg. The combination of very warm...dry and windy conditions prompted the issuance of red flag warnings for the Santa Ynez range the afternoon of the 30th into the early morning hours of the 31st.

--------------------------------------------------------------------------

Record high temperatures for August 2014 across southwestern California

Date location hi temp old record

08/27 Camarillo ap 91 (tied) 91 set in 2009

--------------------------------------------------------------------------

Record low maximum temperatures for August 2014 across southwestern California

Date location hi temp old record

08/03 Lancaster Fox Field 80 81 set in 1976 08/03 Palmdale ap 81 85 set in 1976

--------------------------------------------------------------------------

Record high minimum temperatures for August 2014 across southwestern California

Date location low temp old record

08/02 Camarillo ap 65 (tied) 65 set in 1993 and 1954 08/02 Santa Maria ap 61 (tied) 61 set in 1993 and 1908

08/03 Long Beach ap 71 (tied) 71 set in 1971 08/03 bob hope ap (burbank) 72 69 set in 1955 08/03 Woodland Hills 74 66 set in 1993 08/03 ucla 71 68 set in 1997 and 1966 08/03 Camarillo ap 67 65 set in 1993 and 1954

08/04 ucla 68 67 set in 2008...1971... and 1964 08/04 Santa Maria ap 61 60 set in 2006...1993... and 1910

08/05 Santa Maria ap 61 60 set in 1910

08/06 Santa Maria ap 62 60 set in 1961

08/08 Santa Maria ap 62 (tied) 62 set in 1983

08/09 Camarillo ap 66 (tied) 66 set in 1983

08/20 Camarillo ap 66 (tied) 66 set in 1997 and 1984

08/22 Santa Maria ap 62 61 set in 1997

08/24 Camarillo ap 65 (tied) 65 set in 1971

08/28 Long Beach ap 70 (tied) 70 set in 1984 08/28 ucla 69 (tied) 69 set in 2009 and 1967

08/30 Santa Maria ap 60 (tied) 60 set in 2007 and 1910

--------------------------------------------------------------------------

Record daily rainfall for August 2014 across southwestern California

Date location daily pcpn old record

08/02 downtown Los Angeles 0.02 trace set in 1941...1939... and 1895 08/02 Los Angeles Intl ap 0.01 trace set in 2002 and 1966 08/02 Long Beach ap trace (tied) trace set in 2002 and 1966 08/02 Burbank ap 0.04 first recorded rainfall on this date since 1940 08/02 Sandberg trace (tied) trace set in 1966 08/02 Oxnard NWS trace (tied) trace set in 2010

08/03 downtown Los Angeles 0.02 0.01 set in 1939 and 1899 08/03 Long Beach ap 0.07 trace set in 1961 08/03 bob hope ap (burbank) trace (tied) trace set in 1961 and 1954 08/03 Woodland Hills 0.01 first recorded rainfall on this date since 1949 08/03 Lancaster Fox Field 0.02 (tied) 0.02 set in 2012 08/03 Palmdale ap 0.04 trace set in 2004...1973... 1961 and 1955 08/03 Sandberg 0.16 trace set in 2012 08/03 Camarillo ap 0.03 0.02 set in 2012 08/03 Santa Barbara ap trace (tied) trace set in 2012...2001... and 9 more occurrences

08/23 Santa Barbara ap 0.01 trace set in 1959 and 1950

--------------------------------------------------------------------------

Note: at Santa Maria...the average monthly temperature for August 2014 was 68.4 degrees...which tied with August 1984 for 2nd warmest. The warmest August occurred in 1983 with 68.8 degrees. However...a new August average minimum temperature record was set in 2014 with 59.4 degrees. The old record was 59.0 degrees set in 1910. For the average high temperature in August 2014... Santa Maria tied for the 6th warmest at 77.4 degrees.

--------------------------------------------------------------------------

............climate data for August 2014..............

avg avg avg norm month total norm precip high low month month xtrms precip precip % norm -----------------------------------------------------

L.A. Downtown 84.8 65.8 75.3 74.3 91/63 0.04 0.04 100% l.A. Ap 76.6 65.8 71.2 69.6 84/62 0.03 0.05 60% Long Beach ap 84.4 66.7 75.5 74.3 95/63 0.07 0.03 233% ucla* 79.5 64.4 72.0 70.4 89/61 0.02 0.05 40% Burbank ap 88.0 65.1 76.6 75.3 99/60 0.04 0.07 57% Van Nuys ap+ 91.4 65.6 78.5 77.6 100/61 0.04 0.06 67% Woodland hills* 94.6 61.6 78.1 77.8 101/56 0.01 0.07 14% Lancaster ap 94.4 65.0 79.7 80.9 104/54 0.03 0.10 30% Palmdale ap+ 95.0 66.0 80.5 81.2 104/59 0.04 0.14 29% Sandberg 87.5 65.1 76.3 74.2 97/54 0.16 0.03 533% Camarillo ap+ 80.2 63.4 71.8 67.7 91/58 0.03 0.04 75% Oxnard nws+ 77.0 60.3 68.6 67.4 86/55 0.03 0.01 300% Santa Barbara ap 75.6 59.8 67.7 66.0 83/54 0.01 0.12 8% Santa Maria ap 77.4 59.4 68.4 63.7 85/54 T 0.02 0% San Luis Obispo ap+ 79.6 57.6 68.6 67.0 95/51 0.00 0.04 0% Paso Robles ap 92.6 54.8 73.7 73.2 107/48 0.00 0.11 0%

* stations report 4 PM to 4 PM Standard time...and 5 PM to 5 PM daylight saving time. This may affect calendar day rainfall...and may affect monthly rainfall if a storm begins prior to the 1st of the month or extends beyond the last day of the month. It may also affect calendar daily maximum and minimum temperatures.

+ Due to insufficient data during the 1981-2010 period...normals are unofficial and are projected based on available data

*************** meteorological Summer (jun 2014-Aug 2014) ****************

....climate data for meteorological Summer (jun 2014 through Aug 2014)....

avg avg avg norm Summer total norm precip high low season season xtrms precip precip % norm -----------------------------------------------------

L.A. Downtown 81.9 64.5 73.2 72.3 92/58 0.04 0.14 29% l.A. Ap 75.3 65.1 70.2 68.0 84/59 0.17 0.16 106% Long Beach ap 81.6 65.3 73.4 72.1 95/57 0.08 0.13 62% ucla 77.1 63.4 70.3 68.5 89/56 0.02 0.18 11% Burbank ap 85.8 64.0 74.9 73.1 99/56 0.04 0.20 20% Van Nuys ap+ 89.5 64.2 76.8 75.1 103/56 0.04 0.16 25% Woodland Hills 92.8 60.6 76.7 75.0 105/51 0.01 0.18 6% Lancaster ap 95.0 65.9 80.5 79.8 106/49 0.03 0.24 13% Palmdale ap+ 95.5 66.5 81.0 79.1 107/54 0.04 0.33 12% Sandberg 87.2 64.4 75.8 71.6 99/50 0.17 0.11 155% Camarillo ap+ 78.0 61.8 69.9 66.3 91/51 0.03 0.11 27% Oxnard nws+ 75.6 59.8 67.7 66.1 86/51 0.03 0.08 38% Santa Barbara ap 74.8 59.2 67.0 64.6 90/51 0.02 0.22 9% Santa Maria ap 75.7 57.6 66.6 62.5 85/50 T 0.09 0% San Luis Obispo ap+ 77.8 55.7 66.8 65.2 95/46 T 0.13 0% Paso Robles ap 92.6 55.2 73.9 71.8 107/44 T 0.13 0%

* stations report 4 PM to 4 PM Standard time...and 5 PM to 5 PM daylight saving time. This may affect calendar day rainfall...and may affect monthly rainfall if a storm begins prior to the 1st of the month or extends beyond the last day of the month. It may also affect calendar daily maximum and minimum temperatures.

+ Due to insufficient data during the 1981-2010 period...normals are unofficial and are projected based on available data