Drought Information Statement
Issued by NWS Honolulu, HI

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AXHW70 PHFO 072018
DGTHFO
HIC001-003-007-009-082030-

Drought Information Statement
National Weather Service Honolulu HI
1018 AM HST Thu Dec 7 2017

...ADDITIONAL DROUGHT RELIEF IN NOVEMBER...

SYNOPSIS...

Following a wet October, several areas of the main Hawaiian
Islands continued to receive significant rainfall during the month
of November. For the Big Island, this was the follow-up rainfall
needed to ensure additional relief from agricultural drought that
worsened during the summer. November started with extreme
drought, or the D3 category on the U.S. Drought Monitor Map, over
the South Kohala District from Waimea to Kawaihae and the Kau
District from Punaluu to South Point. By the end of the month, the
upper portion of the South Kohala D3 area eased two levels to
moderate drought, or the D1 category. The lower portion of this
area did not receive as much follow-up rain and improved only one
level to severe drought, or the D2 category. The southern Kau
drought area received significant rainfall and improved two
categories to the D1 category. The upper Mauna Kea D2 area also
improved, going from severe drought to moderate drought over the
past month. Not all areas on the Big Island showed improvement.
Dryness over portions of the South Kona District and the western
portion of the Kau District resulted in an increase in moderate
drought coverage.

On Kauai, recovery from the October rainfall resulted in severe
drought over the lower leeward slopes improving to moderate
drought conditions. A relatively dry November in the area has
prevented a complete recovery.

Agricultural drought conditions also eased over Maui County where
severe drought over west Molokai and the Kihei area of Maui
improved to moderate drought. Similar to Kauai, a lack of
significant follow up rainfall in November has prevented a
complete recovery. Moderate drought conditions over the Waianae
area of Oahu remain unchanged.

SUMMARY OF IMPACTS...

Kauai.
General vegetation and non-irrigated pasture conditions improved
during early November following the October rain events.
However, there has not been significant follow-up rainfall and
this has prevented a complete recovery.

Oahu.
Leeward areas of the island were rather dry in November. The dry
conditions and cooler temperatures have slowed regrowth and
prevented a full recovery. If the dryness persists, a reversal of
the recovery could occur over the next several weeks.

Maui County
Pastures and general vegetation showed improvement over west
Molokai and the Kihei area of Maui. Both areas did not receive
significant follow-up rainfall in November which has stalled the
recovery process.

Big Island.
Ranchers have reported improved pasture conditions over many of
the drought afflicted areas of the island. Reports of filled
stock ponds have come in from some areas in the east half of the
island. Pastures along the lower slopes of the South Kohala
District had some recovery but remained degraded.

CLIMATE SUMMARY...
The NOAA Climate Prediction Center issued a La Nina Advisory on
November 9. This means La Nina conditions are present and are
expected to continue. The La Nina is currently weak and is
expected to remain weak through the northern hemisphere`s
2017-2018 winter season.

PRECIPITATION/TEMPERATURE OUTLOOK...
The Long-Lead Hawaiian Islands Outlook issued on November 16 by the
NOAA Climate Prediction Center shows probabilities favoring above
normal rainfall through the winter. The enhanced rainfall may
primarily affect the north- and east-facing slopes with the
potential for the south- and west-facing slopes to be drier than
normal. Probabilities favor above normal temperatures across the
entire state for the remainder of the year and into spring 2018
due to the forecasted persistence of above average sea surface
temperatures around the Hawaiian Islands. The next long-lead
outlook will be issued by the Climate Prediction Center on
December 21.

HYDROLOGIC SUMMARY AND OUTLOOK...
Data from the U.S. Geological Survey indicated that all of the
monitored streams across the state had November flow levels in
the near to above normal range. Based on the precipitation
outlook, streams and rivers draining the north- and east-facing
slopes of the main Hawaiian Islands have the highest probabilities
for streamflow in the near to above normal range through the
winter months.

NEXT ISSUANCE DATE...
The next Drought Information Statement will be issued on January
11, 2018 or sooner if necessary in response to significant
changes in conditions.

RELATED WEB SITES...
Additional information on current drought conditions may be found
at the following web addresses:

U.S. Drought Monitor: droughtmonitor.unl.edu/
Hawaii Drought Monitor: dlnr.hawaii.gov/drought
USGS Hawaii - Recent Conditions: hi.water.usgs.gov/recent/index.html
Climate Prediction Center long-lead Hawaii outlook:
www.cpc.ncep.noaa.gov/products/predictions/90day/fxhw40.html
Hawaii Drought Impact Reporter: hawaii.droughtreporter.unl.edu/

ACKNOWLEDGMENTS...
Information for this product was compiled from a number of sources
including the county boards and departments of water supply, U.S.
and State of Hawaii agriculture agencies, the U.S. Geological
Survey, and the media.

QUESTIONS OR COMMENTS...
If you have any questions or comments about this drought
information statement, please contact:

Kevin Kodama
National Weather Service
2525 Correa Rd. Suite 250
Honolulu HI  96822
Phone: 808-973-5276
Email: Kevin.kodama@noaa.gov

$$


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