Drought Information Statement
Issued by NWS Honolulu, HI

Current Version | Previous Version | Graphics & Text | Print | Product List | Glossary On
Versions: 1 2
000
AXHW70 PHFO 092049
DGTHFO
HIC001-003-007-009-110000-

Drought Information Statement
National Weather Service Honolulu HI
1049 AM HST Thu Nov 9 2017

...OCTOBER RAINFALL HALTS DROUGHT PROGRESSION...

SYNOPSIS...

Above average October rainfall across most of the main Hawaiian
Islands has halted the spread and intensification of drought
conditions in the state. In the leeward areas of the state, most
of the above average rainfall occurred on just a few days whereas
windward rainfall was more broadly distributed throughout the
month. Most of the drought impacts have been in the agriculture
sector so it is too soon to tell how much improvement occurred
until an assessment of pasture and vegetation conditions is
completed. Thus, the U.S. Drought Monitor map continues to show
extreme drought, or the D3 category, over portions of the Big
Island. This includes the South Kohala District from Waimea to
Kawaihae and the Kau District from Punaluu to South Point. Severe
drought, or the D2 category, also persists along the upper slopes
of the Hamakua, North Hilo, and South Hilo Districts.

In Maui County, moderate drought, or the D1 category, was eliminated
over the windward slopes of Haleakala and portions of Upcountry
Maui. Areal coverage of moderate drought over Kauai was reduced
slightly with D1 conditions pushed south of Wailua. The Oahu
moderate drought area remains unchanged for now over the lower
leeward slopes of the Waianae Range.

SUMMARY OF IMPACTS...

Kauai.
Recent rainfall has halted the deterioration of non-irrigated
pastures over south Kauai. Regrowth has started but additional
rainfall will be needed to sustain recovery. Additional assessments
will be made in the coming weeks.

Oahu.
Pastures and general vegetation are starting to recover following recent
rainfall but it is still early in the process and follow-up rainfall
is needed. Very little leeward rainfall has been recorded thus far
in November.

Maui County
Reservoir levels in the Upcountry area of Maui have improved and the
potential for above average rainfall during the wet season prompted
the Maui County Department of Water Supply to cancel the Stage 1 Water
Shortage on October 25. Pastures and general vegetation in leeward
sections of Maui County have started to recover but it is still early
in the process and follow-up rainfall will be needed to ensure the
recovery is sustained. Since the October 24 heavy rain event there
has not been significant leeward rainfall.

Big Island.
Significant rainfall over the windward slopes of the Big Island has
improved spring flow supplying the Ninole and Hakalau water systems.
As a result, the County of Hawaii Department of Water Supply canceled
its request for a 10 percent voluntary reduction in water use on
October 18. Pasture and general vegetation regrowth has started over
most of the leeward drought impacted areas on the Big Island. However,
follow-up rainfall will be needed to ensure a sustained recovery.

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 October 19 by the
NOAA Climate Prediction Center does not show any tilt in the probabilities
for above or below normal rainfall through the fall. Probabilities
favor above normal rainfall for the winter. If La Nina develops, 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 November 16.

HYDROLOGIC SUMMARY AND OUTLOOK...
Data from the U.S. Geological Survey indicated that most of the monitored
streams across the state had October flow levels in the near to above
normal range. A few of the streams along the northern Koolau Range of
Oahu had below normal flow levels. Based on the precipitation outlook,
streams and rivers draining the north- and east-facing slopes of the
main Hawaiian Islands have the highest likelihood 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 December 7,
2017 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

$$



USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.