Drought Information Statement
Issued by NWS Honolulu, HI

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AXHW70 PHFO 080117
DGTHFO
HIC001-003-007-009-090130-

Drought Information Statement
National Weather Service Honolulu HI
317 PM HST Fri Sep 7 2018

...HURRICANE LANE DELUGE MISSES WORST DROUGHT AREAS...

SYNOPSIS...

The passage of Hurricane Lane near the State of Hawaii in late
August produced over 50 inches of rainfall and significant
flooding along portions of the windward slopes of the Big Island.
The windward slopes of Maui received over 20 inches in some spots
and also sustained significant flooding. However, most of the
existing drought areas along the leeward slopes received much less
rainfall. Severe drought, or the D2 category on the U.S. Drought
Monitor Map, covered the lower leeward slopes of Molokai and Maui
in Maui County, and the North Kona and South Kohala Districts of
the Big Island prior to Lane`s passage. Some reduction in the
severe drought coverage may occur once vegetation has had
sufficient time to recover. Areas of moderate drought, or the D1
category, along the leeward slopes of the Big Island, Maui,
Molokai, and Oahu will likely be reduced following a recovery
period.

SUMMARY OF IMPACTS...

Kauai.
There are no drought impacts to report.

Oahu.
General vegetation conditions were deteriorating and brush fire
incidents were on the rise prior to Hurricane Lane but appear to
be improving in some areas.

Maui County
A fast-moving brush fire along the leeward slopes of the West Maui
Mountains during the passage of Hurricane Lane damaged or
destroyed over 20 structures and 30 vehicles. This occurred while
there was damaging flash flooding on the opposite side of the
island.

Big Island.
Rainfall from Lane has improved vegetation conditions in some of
the existing drought areas. The USDA Farm Service Agency is in the
process of assessing conditions.

CLIMATE SUMMARY...
According to the NOAA Climate Prediction Center, ENSO-neutral
conditions are present in the Pacific Ocean but probabilities
favor a transition to El Nino conditions in the fall of 2018.

PRECIPITATION/TEMPERATURE OUTLOOK...
The Long-Lead Hawaiian Islands Outlook issued on August 16 by the
NOAA Climate Prediction Center shows probabilities favoring above
normal rainfall into the middle of fall 2018. Below normal
rainfall is forecast for the upcoming winter and spring months as
a result of the developing El Nino event. Probabilities favor
above normal temperatures across the entire state into early 2019
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
September 20.

HYDROLOGIC SUMMARY AND OUTLOOK...
Data from the U.S. Geological Survey indicated that most of the
monitored streams across the state had flow levels in the much
above normal to high flow range. Based on the precipitation
outlook, streamflow is expected to be above normal through the
middle of fall.

NEXT ISSUANCE DATE...
The next Drought Information Statement will be issued on October
5, 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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