Hawaii, 2001

Flood in Hawaii, June 5, 2001

June 5, 2001 · NWS HFO · 1 event in 1 county or zone

Heavy showers and thunderstorms produced minor stream and drainage ditch flooding and ponding of roadways on the islands of Molokai, Lanai, and Maui. Also, small hail was reported at 3500-feet elevation near Olinda in Upcountry Maui.

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

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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.

Heavy showers and thunderstorms produced minor stream and drainage ditch flooding and ponding of roadways on the islands of Molokai, Lanai, and Maui. Also, small hail was reported at 3500-feet elevation near Olinda in Upcountry Maui. However, no serious injuries or property damage were reported.

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 Jun 5, 10:00 AM HST, 2 hours 45 minutes earlier.

Area forecast discussion, Jun 5, 10:00 AM HST, 2 hours 45 minutes before
HAWAIIAN ISLANDS SYNOPTIC DISCUSSION AND GUIDANCE
NATIONAL WEATHER SERVICE HONOLULU HI
1000 AM HST TUE JUN 05 2001

SUMMARY...HIGH PRESSURE CENTERED FAR NORTH OF THE ISLANDS WILL
CONTINUE OUR MODERATE TRADE WINDS. A LOW PRESSURE CIRCULATION IN THE
UPPER ATMOSPHERE IS CAUSING UNSTABLE CONDITIONS OVER THE STATE WITH
SHOWERS QUITE NUMEROUS AND LOCALLY HEAVY...WITH ISOLATED
THUNDERSTORMS.

DISCUSSION...EXPECT THE ISLANDS TO REMAIN WITHIN A BELT OF 10 TO 25
MPH TRADES THROUGH THE FORECAST PERIOD. AN UPPER LOW REMAINS OVER
THE STATE WITH ITS CENTER JUST NORTH OF THE ISLANDS. MODELS KEEP IT
NEARLY STATIONARY FOR 24 TO 48 HOURS BEFORE MOVING IT OFF TO THE
SOUTHWEST AND WEAKENING IT. LOW LEVEL MOISTURE HAS BEEN FEEDING INTO
OUR AREA FROM THE EAST SUSTAINING SHOWERS AND THUNDERSTORMS. THESE
WILL OCCUR AS LONG AS THE CENTER OF THE UPPER LOW IS OVER US FOR THE
NEXT DAY OR TWO. THE MORNING SOUNDINGS SHOW MOST INSTABILITY OVER
THE HILO END OF THE CHAIN. HOWEVER THE LIHUE SOUNDING WAS TAKEN WHEN
LOW LEVEL MOISTURE WAS SPARSE...A SITUATION WHICH HAS CHANGED SINCE
THEN. HEAVY SHOWERS AND ISOLATED THUNDERSTORMS HAVE FORMED OVER
WINDWARD AND MAUKA SECTIONS OF OAHU WITHIN THE PAST FEW HOURS.
EXPECT THUNDERSTORMS TO DEGENERATE TO MODERATE AND HEAVY SHOWERS
THIS AFTERNOON NEAR THE SMALLER ISLANDS BEFORE POSSIBLE REGENERATING
TONIGHT. DAYTIME HEATING MAY FIRE HEAVY SHOWERS AND THUNDERSTORMS
-OVER KONA SLOPES OF THE BIG ISLAND THIS AFTERNOON. POWELL

.PHFO......WARNINGS.....NONE
.          WATCHES......NONE
.          ADVISORIES...URBAN AND SMALL STREAM OAHU CANCELLED AT
                        835 AM HST

The radar

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

Open the radar archive at this moment

Event by event

1 flood. Local standard time, as filed.

Flood, Maui

When
June 5, 12:45 PM HST to 3:15 PM HST
Where
Maui County, Maunaloa
Reported by
OFFICIAL NWS OBS.
Coordinates
20.868, -156.617 (the zone’s center; the record gives no point)

What these are

Flood
Flooding that develops more slowly than a flash flood: rivers leaving their banks, or water standing over land for an extended time.

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

The same day elsewhere

More

Every storm in Hawaii in 2001Every state in 2001This day in weather historyWarnings in Hawaii, June 2001

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: 5251333.