Hawaii, 2004

Heavy Rain in Hawaii, April 20, 2004

April 20, 2004 · NWS HFO · 1 event in 1 county or zone

Heavy showers caused ponding of roadways, and drainage ditch and small stream flooding in eastern and central parts of the Garden Isle of Kauai. 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.

Heavy showers caused ponding of roadways, and drainage ditch and small stream flooding in eastern and central parts of the Garden Isle of Kauai. 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 20, 3:30 AM HST, 5 minutes earlier.

Area forecast discussion, Apr 20, 3:30 AM HST, 5 minutes before
NARRATIVE SYNOPTIC DISCUSSION FOR WAKE ISLAND

WAKE WILL STAY IN THE TRADE WIND BELT DURING THE FORECAST PERIOD
WITH MODERATE TRADES BLOWING IN THE 15 TO 20 MPH. THERE WILL BE A
FEW PASSING SHOWERS...OTHERWISE SUNNY AND CLEAR SKIES WILL BE THE
RULE. ONLY SHORT PERIOD TRADE WIND SWELL IS EXPECTED DURING THE NEXT
FEW DAYS. SOME MODERATE NW SWELL WILL ARRIVE ON SUNDAY FROM A LOW
OVER HOKKAIDO TODAY.

EFFECTIVE MAY 26...2004 AT 1800 UTC...THE NATIONAL WEATHER SERVICE
FORECAST OFFICE IN HONOLULU WILL DISCONTINUE THIS PRODUCT.

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, Kauai

When
April 20, 3:35 AM HST to 7:45 AM HST
Where
Kauai County, Hanalei
Reported by
OFFICIAL NWS OBS.
Coordinates
22.011, -159.705 (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: 5431398.