Hawaii, 2004

Heavy Rain in Hawaii, April 22, 2004

April 22, 2004 · NWS HFO · 1 event in 1 county or zone

Thunderstorms and heavy showers over coastal and upslope areas of the South Kona District on the Big Island of Hawaii produced small stream and drainage ditch flooding, and ponding of roadways. There were no reports of serious property damage or injuries.

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.

Thunderstorms and heavy showers over coastal and upslope areas of the South Kona District on the Big Island of Hawaii produced small stream and drainage ditch flooding, and ponding of roadways. There were no reports of serious property damage or injuries.

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 Apr 22, 4:00 PM HST, 25 minutes earlier.

Area forecast discussion, Apr 22, 4:00 PM HST, 25 minutes before
HAWAIIAN ISLANDS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HONOLULU HI
400 PM HST THU APR 22 2004

.SYNOPSIS...TRADE WIND SHOWERS WILL BE INCREASING AFTER THE WEEKEND
 WHEN A SHEARLINE ARRIVES.

&&

.DISCUSSION...THE STILL LIGHT TRADE WINDS PERMITTED SOME LOCALIZED
 CONVECTION THIS AFTERNOON...SOUTH MAUI HAS HAD THE MOST WITH OVER
 AN INCH OF RAIN SO FAR. HOWEVER PRESSURES ACROSS THE STATE HAVE
 BEGUN TO ACCELERATE AND SHOULD SIGNAL THE FIRMING OF OUR TRADE
 FLOW BY TOMORROW AND A FURTHER MINIMIZING OF ANY CONVECTION.
 THERE ARE INCOMING TRADE SHOWERS JUST EAST OF THE BIG ISLAND WHICH
 SHOULD ARRIVE THERE TONIGHT..AND SPREAD TO OTHER ISLANDS TOMORROW.
 BEYOND THE WEEKEND..A SHEARLINE IS PROJECTED TO ARRIVE MONDAY AND
 TUESDAY CLEARING WEDNESDAY. THE SHEAR LINE SHOULD BE BENDING THE
 WINDS FROM A MORE NORTHERLY AND COOLER DIRECTION.

&&

.SURF...THE LARGER SOUTHERLY SWELLS HAVE NOT YET ARRIVED AT THE
 EQUATORIAL BUOY. A HIGH SURF ADVISORY..OR WARNING..WILL LIKELY BE
 ISSUED PRIOR TO ITS ARRIVAL HERE ON SATURDAY. WE AWAIT A MORE
 DEFINITIVE SWELL PROFILE FROM THE BUOY BEFORE ANY ISSUANCE.

&&

.WATCHES/WARNINGS/ADVISORIES...NONE.

MATSUDA

The radar

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

Open the radar archive at this moment

Event by event

1 heavy rain. Local standard time, as filed.

Heavy Rain, Hawaii

When
April 22, 4:25 PM HST to 7:30 PM HST
Where
Hawaii County, Kealakekua
Reported by
OFFICIAL NWS OBS.
Coordinates
19.602, -155.523 (the zone’s center; the record gives no point)

What these are

Heavy Rain
Rainfall totals unusual for the place and season that did not produce a flood.

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

The same day elsewhere

More

Every storm in Hawaii in 2004Every state in 2004This day in weather historyWarnings in Hawaii, April 2004

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: 5431401.