Heavy Rain in Hawaii, April 20 to 21, 2013

Name: Heavy Rain in Hawaii, April 20 to 21, 2013
Start: 2013-04-20T21:24
End: 2013-04-21T03:30
Location: Hawaii

April 20 to 21, 2013 · NWS HFO · 1 event in 1 county or zone

Nighttime showers in East Maui generated ponding on roadways, and small stream and drainage ditch flooding. No significant property damage or injuries were reported.

Where it happened

Every event with a place to put it. 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.

Nighttime showers in East Maui generated ponding on roadways, and small stream and drainage ditch flooding. No significant property damage or injuries 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 Apr 20, 8:30 PM HST, 54 minutes earlier.

Area forecast discussion, Apr 20, 8:30 PM HST, 54 minutes before

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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, Maui

When: April 20, 9:24 PM HST to April 21, 3:30 AM HST
Where: Maui County, 0.75 mi W of Hana to 0.83 mi NNW of Kaupo
Reported by: Official NWS Observations
Coordinates: 20.772, -155.991

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

Every storm in Hawaii in 2013 Every state in 2013 This day in weather history Warnings in Hawaii, April 2013

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: 438864.