Name: Drought in Hawaii, September 6 to 30, 2007
Start: 2007-09-06T06:00
End: 2007-09-30T23:59
Location: Hawaii

Where it happened

Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.

Tornadoes
Tropical storms and surge
Floods
Wind
Hail
Winter weather
Heat and drought
Cold
Fire, smoke and dust
Marine and coastal
Other

Open the live radar over this ground

The toll

Deaths: 0
Injuries: 0
Property damage: None recorded
Crop damage: None recorded
Events: 1

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What happened

The episode as NWS HFO wrote it up.

Persistent dry weather conditions led county officials to implement a 30 percent reduction in water consumption for users of the Waimanalo Irrigation System on the island of Oahu. No crop damage estimates were available, however.

This part of Honolulu County was put into the D2 classification in the Drought Monitor as of September 6th, 2007.

What forecasters said that day

The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Honolulu, HI wrote its last area forecast discussion before the first event at Sep 6, 3:30 AM HST, 2 hours 30 minutes earlier.

Area forecast discussion, Sep 6, 3:30 AM HST, 2 hours 30 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HONOLULU HI
330 AM HST THU SEP 6 2007

.SYNOPSIS...TRADE WINDS WILL BE ON THE LIGHTER SIDE INTO FRIDAY...
INCREASING SLIGHTLY OVER THE WEEKEND. MORNING LAND BREEZES WILL GIVE
WAY TO SEA BREEZES THIS AFTERNOON...WITH CLOUDS DEVELOPING OVER
LEEWARD AREAS THIS AFTERNOON. RELATIVELY DRY WEATHER WILL PREVAIL
TODAY...BUT TRADE WINDS WILL DELIVER A FEW SHOWERS TO WINDWARD AND
MAUKA AREAS THEREAFTER.

&&

.DISCUSSION...THE TRADE WIND-SUPPORTING RIDGE TO OUR NORTH HAS BEEN
WEAKENED AND NUDGED SOUTHWARD...AS A FRONT FAR TO OUR NORTHWEST HAS
DUG INTO ITS WESTERN EDGE. THE FRONT IS IN THE PROCESS OF
WEAKENING...BUT WILL KEEP THE RIDGE SUPPRESSED THROUGH TONIGHT.
ALTHOUGH ANOTHER FRONT WILL FOLLOW THIS FIRST ONE OVER THE
WEEKEND...IT WILL NOT DIG AS FAR SOUTH...AND THE RIDGE WILL
GRADUALLY STRENGTHEN BEGINNING FRIDAY...ALLOWING TRADE SPEEDS TO
BUILD TO MODERATE SPEEDS OVER THE WEEKEND. MODERATE TRADES WILL
CONTINUE UNTIL THE MIDDLE OF NEXT WEEK...WHEN WEAK TROUGHING FAR
NORTHEAST OF THE ISLANDS WILL LOOSEN THE PRESSURE GRADIENT...
RESULTING IN LIGHTER WINDS AGAIN.

WEAK RIDGING ALOFT WILL PERSIST...PREVENTING DEEP CONVECTION FROM
OCCURRING. HOWEVER...THE SOMEWHAT ELEVATED INVERSION BASE...NEAR 8
THOUSAND FEET...WILL ALLOW INCOMING MOISTURE FIELDS TO DELIVER A FEW
WINDWARD-BASED SHOWERS. IMMEDIATELY UPSTREAM OF THE ISLANDS...FEW TO
SCATTERED CLOUDS ARE SEEN...AND A RELATIVELY DRY DAY IS EXPECTED.
FURTHER EAST...TWO CLOUD AREAS ARE POSSIBLE SOURCES FOR SHOWERS OVER
THE NEXT COUPLE OF DAYS.

ONE AREA OF CLOUDS AND SHOWERS IS CURRENTLY NEAR 21N 151W...AND IS
MOVING WEST NEAR 13 MPH. THIS AREA IS EXPECTED TO ARRIVE OVER
WINDWARD BIG ISLAND BY THIS EVENING...AND SPREAD WEST UP THE ISLAND
CHAIN TONIGHT AND EARLY FRIDAY. ANOTHER AREA OF MOISTURE...WHICH CAN
TRACED BACK TO THE REMNANTS OF EX-EASTERN PACIFIC TROPICAL
DEPRESSION GIL...IS LOCATED FROM 18N TO 25N BETWEEN 146W AND 142W.
CONFIDENCE REMAINS LOW...BUT THIS AREA IS FORECAST TO ARRIVE ON
SATURDAY AND LINGER THROUGH SATURDAY NIGHT...THEREBY SLIGHTLY
COMPLICATING THE ALL IMPORTANT WEEKEND FORECAST. WITH TRADES
BLOWING...THESE CLOUD AREAS WILL FOCUS THEIR SHOWERS ON WINDWARD
SLOPES...AND LEEWARD AREAS SHOULD SEE LOTS OF SUN. HAVE NOT
EXPLICITLY PLACED THIS SECOND AREA OF MOISTURE INTO THE GRIDS...
BUT INSTEAD HAVE TRENDED THE FORECAST TOWARD A CLIMATOLOGICAL POP
REGIME FOR THE WEEKEND.

&&

.HFO WATCHES/WARNINGS/ADVISORIES...NONE.

&&

BIRCHARD

The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

1 drought. Local standard time, as filed.

Drought, Olomana

When: September 6, 6:00 AM HST to September 30, 11:59 PM HST
Where: Olomana forecast zone
Reported by: County Official
Coordinates: 21.455, -157.961 (the zone’s center; the record gives no point)

What these are

Drought: A drought reaching severe (D2) or worse on the US Drought Monitor, or with notable impacts.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in Hawaii in 2007 Every state in 2007 This day in weather history Warnings in Hawaii, September 2007

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 55366.