Drought Information Statement
Issued by NWS San Joaquin Valley, CA

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Drought Information Statement
National Weather Service Hanford CA
845 AM PST Wed Feb 22 2017

...THREE CONSECUTIVE MONTHS OF VERY WET WEATHER RELIEVE THE DROUGHT
ACROSS CENTRAL CALIFORNIA...

SYNOPSIS...

Three consecutive months of above normal precipitation, specifically
the months of December 2016, January 2017, and the three weeks so
far this February, have significantly reduced the drought across the
central California interior. Several Pacific storm systems with
atmospheric rivers of copious tropical moisture moved through
central California and brought heavy rainfall to the San Joaquin
Valley, foothills, and mountains generally below 6000 feet during
the past few months. Ponding basins in the San Joaquin Valley and
several of the major reservoirs across central California were full
or nearly full by the middle of February while rivers and streams
produced high water flows. The Merced River at Stevinson of
groundwater will occur in the weeks ahead. A very active spring
snowmelt season is likely over the Sierra Nevada with a continued
threat of river flooding in the lower elevations through April or
May.

The California Drought Monitor, released on February 16th, showed
most of the central California interior at category 0, or D0
(abnormally dry). Only the southernmost fringe of Kern County and the
Tulare County portion of the San Joaquin Valley remained in Category
1, or D1 (moderate drought).

SUMMARY OF IMPACTS...

Precipitation during the past 30 days

Precipitation has averaged much above normal throughout the central
California interior, or exceeding 150 percent of normal. As of
February 21st, the percentage of normal snowpack over the southern
Sierra Nevada was 206 percent of normal.

CLIMATE SUMMARY...

PRECIPITATION...

For the current water year of October 1st through February 21st,
Fresno received 12.52 inches of rain...which is 5.33  inches above
the average through February 21st of 7.19 inches. The wettest water
year to date in Fresno for the period October 1st through February
21st was in 1969 with a total of 16.81 inches of rain.

For the current water year of October 1st through February 21st,
Bakersfield received 7.25 inches of rain, which is 3.20 inches above
the average rainfall through February 21st of 4.05 inches. The
wettest water year to date in Bakersfield for the period of October
1st through February 21st was in 1998 with a total of 8.32 inches of
rain.

For January, Fresno received 5.50 inches of rain. The normal
rainfall for the month of January is 2.19 inches.

For January, Bakersfield received 2.76 inches of rain. The normal
rainfall for the month of January is 1.16 inches.

For December, Fresno received 2.51 inches of rain. The normal
rainfall for the month of December is 1.77 inches.

For December, Bakersfield received 2.41 inches of rain. The normal
rainfall for the month of December is 1.02 inches.

TEMPERATURE...

For January, the average temperature in Fresno was 48.1 degrees,
which is 1.5 degrees above normal.

For January, the average temperature in Bakersfield was 50.1
degrees, which is 2.3 degrees above normal.

For December, the average temperature in Fresno was 47.1 degrees,
which is 0.6 degree above normal.

For December, the average temperature in Bakersfield was 49.9
degrees, which is 2.1 degrees above normal.

YEAR TO DATE...

For the first 52 days of 2017, or January 1st through February 21st,
the average temperature in Fresno was 51.2 degrees which is the 10th
warmest first 52 days on record. The warmest first 52 days in Fresno
occurred in 2014 with an average temperature of 54.0 degrees.

For the first 52 days of 2017, or January 1st through February 21st,
the average temperature in Bakersfield was 53.5 degrees which is the
5th warmest first 52 days on record. The warmest first 52 days in
Fresno occurred in 1978 with an average temperature of 55.1 degrees.

PRECIPITATION/TEMPERATURE OUTLOOK...

The NOAA Climate Prediction Center 6-10 day outlook issued on
February 21st, 2017 forecasts a 70 percent chance of above normal
temperature with a 40 percent chance of above normal precipitation
over the central California interior.

The latest 8-14 day outlook forecasts a 60 percent chance of below
normal temperatures and a 35 to 40 percent chance of below normal
precipitation.

The climate prediction outlook for the next 30 days, based on data
from the current state of the oceans and atmosphere, along with
climate models, from the NOAA Climate Prediction Center forecasts
above normal temperatures and slightly above normal precipitation
over the central California interior.

For the three-month period during March through May 2017, the
outlook favors near average temperatures and precipitation. Please
see links below.

HYDROLOGIC SUMMARY AND OUTLOOK...

The Climate Prediction Center indicates that ENSO-neutral conditions
are present at this time and are expected to continue until at least
Spring 2017. (ENSO stands for El-Nino Southern Oscillation).

Unless any part of central California returns to D2 Drought Status,
this will be the final drought information statement issued by the
National Weather Service San Joaquin Valley Forecast Office.

&&

Related websites...
California Data Exchange Center:
http://cdec.water.ca.gov/
California-Nevada River Forecast Center:
http://www.cnrfc.noaa.gov/
Drought Monitor:
http://drought.unl.edu/dm/monitor.html
California Drought Page:
http://watersupplyconditions.water.ca.gov/
Climate Prediction Center:
http://www.cpc.noaa.gov/index.php
National Weather Service Hanford:
http://www.wrh.noaa.gov/hnx/
Western Region Climate Center:
http://www.wrcc.dri.edu


Acknowledgements...

Climate Prediction Center Drought Monitor
Western Region Climate
Center California-Nevada River Forecast Center
National Weather Service San Joaquin Valley - Hanford
California Department of Water Resources
California State Climatologist
California Office of Emergency Services
U.S. Bureau of Reclamation
Cal Fire
The Los Angeles Times - www.latimes.com

Questions and comments: Please refer all questions to
W-hnx.webmaster@noaa.gov

$$

Durfee/Ochs

weather.gov/hanford


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