Drought Information Statement
Issued by NWS Los Angeles, CA

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AXUS76 KLOX 151808 CCA
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CAC037-079-083-111-312359-

DROUGHT INFORMATION STATEMENT
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA
1108 AM PDT Thu Mar 15 2018

...Drought Conditions Return To Southern California As A Result
Of Below Normal Winter Rainfall...

SYNOPSIS...

The current water year, which began on October 1, 2017, has resulted
in below normal rainfall for the four counties that comprise the
forecast area of the National Weather Service Los Angeles/Oxnard
forceast office. These counties include San Luis Obispo, Santa
Barbara, Ventura, and Los Angeles. Although the observed precipitation
in March has been near normal in these counties, observed precipitation
for the water year has been well below normal. Most areas in these
counties have received roughly 30 - 40 percent of their normal precipitation
since October 1st. As a result, the weekly U.S. Drought Monitor maps
started depicting drought conditions across southern California in late
February.

The current U.S. Drought Monitor map shows Severe Drought (D2) across much
of San Luis Obispo, Santa Barbara, Ventura, and Los Angeles Counties. The
north west corner of San Luis Obispo County depicts Abnormally Dry (D0) and
Moderate Drought (D1) conditions. There is a swath of Extreme Drought (D3)
across central portions of Ventura County and a small portion of north
west Los Angeles County.

Currently the U.S.Drought Monitor classifies 43.6% of the state of
California in a drought category.

The U.S. Drought Monitor classifies drought into five categories of
increasing severity: Abnormally Dry (D0)...Moderate Drought (D1)...
Severe Drought (D2)...Extreme Drought (D3)...and Exceptional Drought (D4).

SUMMARY OF IMPACTS...

In addition to the below normal precipitation for the current water year,
many of the local reservoirs are at storage levels that are well below
the normal levels for this time of year. Many of these reservoirs never
fully recovered from the 5 consecutive drought years of 2012-2016. A
summary of current reservoir levels at select locations is included
below.

Casitas Municipal Water District in Ventura County has a Stage III drought
declaration in place for its service area. The declaration calls for a
continued 10% reduction in water use and only allows for one day per week
of outdoor residential irrigation.

According to the UC Cooperative Extension Livestock and Range advisor for
Santa Barbara and Ventura Counties, the forage situation on rangelands for
cattle producers in these two counties is very compromised due to the
recent lack of precipitation.

Following is a summary of reservoir levels in central and
southwestern California.

Gibraltar Reservoir in Santa Barbara County is currently at 43.6% of
its storage capacity.

Jameson Reservoir in Santa Barbara County is currently at 56.9% of
its storage capacity.

Cachuma Reservoir in Santa Barbara County is currently at 39.1% of
its storage capacity.

Twitchell Reservoir in Santa Barbara and San Luis Obispo County is
currently at 1.2% of its storage capacity.

Lake Nacimiento in San Luis Obispo County is currently at 44%
of its storage capacity.

Lake San Antonio in San Luis Obispo County is currently at 32%
of its storage capacity.

Lopez Lake in San Luis Obispo County is currently at 50.2% of its
storage capacity.

Lake Casitas in Ventura County is currently at 34.6% of its storage
capacity.

Lake Piru in Ventura county is currently at ~16% of its storage
capacity.

Castaic Lake in Los Angeles County is currently at 81% of its
storage capacity.

Pyramid Lake in Los Angeles County is currently at 93% of its
storage capacity.

CLIMATE SUMMARY...

Current water year (October 1, 2017 - February 28, 2018) precipitation
totals for selected locations are:

San Luis Obispo    4.37 inches or 26% of normal to date
Santa Barbara     2.80 inches or 22% of normal to date
Oxnard             1.30 inches or 12% of normal to date
Los Angeles        1.92 inches or 18% of normal to date

PRECIPITATION/TEMPERATURE OUTLOOK...

NOAA`s National Weather Service Climate Prediction Center outlook for
the next 30 days in southern California is indicating below normal
precipitation and above normal temperatures. This means slightly above
normal temperatures and below normal precipitation conditions will
prevail across the area into spring.

HYDROLOGIC SUMMARY AND OUTLOOK...

No significant increases in area rivers and reservoirs are expected
over the next month.

NEXT ISSUANCE DATE...

The next issuance date will be in mid April 2018.

&&

RELATED WEB SITES...

California Data Exchange Center:
http://cdec.water.ca.gov/
California Nevada River Forecast Center:
http://www.cnrfc.noaa.gov/
U.S. Drought Monitor:
http://droughtmonitor.unl.edu
U.S. Drought Portal:
http://www.drought.gov/drought/
California Drought Page:
http://www.water.ca.gov/waterconditions/
Climate Prediction Center:
http://www.cpc.ncep.noaa.gov/
National Weather Service Los Angeles/Oxnard:
http://www.weather.gov/
Los Angeles California Daily Streamflow Conditions:
http://waterdata.usgs.gov/ca/nwis/rt
California Drought State of Emergency Declaration:
www.gov.ca.gov/news.php?id=18368
Association of California Water Agencies:
http://www.acwa.com/content/local-drought-response

ACKNOWLEDGMENTS...

Climate Prediction Center
U.S. Drought Monitor
California Nevada River Forecast Center
National Weather Service Los Angeles/Oxnard
California Department of Water Resources
United States Geological Survey
County of San Luis Obispo
County of Santa Barbara
Association of California Water Agencies
Casitas Municipal Water District

QUESTIONS AND COMMENTS...

Please refer all questions to w-lox.webmaster@noaa.gov

$$

Laber

weather.gov/losangeles



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