An upper low, known as a kona low in Hawaii, and concomitant trough developed west of the islands and brought heavy showers, thunderstorms, and flash flooding to the area.  There were no serious injuries.  The costs of any damages were not available.

Flash Flood in KAUAI, HAWAII
From 16-MAR-20 23:30:00 to 17-MAR-20 15:39:00 (HST-10)
Location: PRINCEVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Kuhio Highway near the Hanalei Bridge became impassable near Hanalei due to the Hanalei River overflowing its banks. Also, part of Route 50, Kaumualii Highway, near Waimea was closed around 0735 HST on the 17th, and other roadways were closed in Waimea, because of flooding waters from heavy rainfall on Kauai.

Flash Flood in HONOLULU, HAWAII
From 15-MAR-20 14:02:00 to 15-MAR-20 15:52:00 (HST-10)
Location: WAIKANE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Kamehameha Highway was closed in Waikane on Oahu's windward side because of mud and other debris on the roadway after heavy downpours.

Heavy Rain in HAWAII, HAWAII
From 15-MAR-20 16:06:00 to 15-MAR-20 18:52:00 (HST-10)
Location: KAMUELA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Heavy Rain in MAUI, HAWAII
From 15-MAR-20 16:34:00 to 15-MAR-20 21:39:00 (HST-10)
Location: HONOKAHUA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Flash Flood in KAUAI, HAWAII
From 16-MAR-20 12:05:00 to 16-MAR-20 17:36:00 (HST-10)
Location: PRINCEVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Kuhio Highway was closed near the Hanalei Bridge in Hanalei because the Hanalei River overflowed its banks due to heavy rain.

Heavy Rain in HONOLULU, HAWAII
From 16-MAR-20 14:54:00 to 16-MAR-20 17:38:00 (HST-10)
Location: MAKAKILO CITY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Flash Flood in HONOLULU, HAWAII
From 17-MAR-20 11:05:00 to 17-MAR-20 12:47:00 (HST-10)
Location: MAKAHA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Farrington Highway at Upena Street was closed in Makaha in leeward Oahu because of flooding.

Heavy Rain in KAUAI, HAWAII
From 17-MAR-20 02:30:00 to 17-MAR-20 08:21:00 (HST-10)
Location: PUUWAI
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Heavy Rain in MAUI, HAWAII
From 17-MAR-20 14:25:00 to 17-MAR-20 20:07:00 (HST-10)
Location: HONOKOWAI
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Heavy Rain in KAUAI, HAWAII
From 18-MAR-20 11:20:00 to 18-MAR-20 12:46:00 (HST-10)
Location: KAUNALEWA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Heavy Rain in KAUAI, HAWAII
From 18-MAR-20 15:35:00 to 18-MAR-20 17:14:00 (HST-10)
Location: MANA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Heavy Rain in MAUI, HAWAII
From 17-MAR-20 13:33:00 to 17-MAR-20 15:25:00 (HST-10)
Location: MAUNALOA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Heavy Rain in MAUI, HAWAII
From 17-MAR-20 14:03:00 to 17-MAR-20 15:24:00 (HST-10)
Location: SHIPWRECK BEACH
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Heavy Rain in MAUI, HAWAII
From 14-MAR-20 17:19:00 to 14-MAR-20 20:06:00 (HST-10)
Location: KAHAKULOA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Heavy Rain in MAUI, HAWAII
From 14-MAR-20 17:35:00 to 14-MAR-20 20:07:00 (HST-10)
Location: KALAUPAPA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Heavy Rain in MAUI, HAWAII
From 15-MAR-20 11:52:00 to 15-MAR-20 13:33:00 (HST-10)
Location: PAPOHAKU BEACH PARK
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Heavy Rain in HAWAII, HAWAII
From 14-MAR-20 10:00:00 to 14-MAR-20 11:26:00 (HST-10)
Location: WAIKOLOA VILLAGE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Flash Flood in HONOLULU, HAWAII
From 18-MAR-20 16:38:00 to 18-MAR-20 18:19:00 (HST-10)
Location: WAIKANE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Kamehameha Highway was closed at the Waikane Stream near Waikane in windward Oahu because of flooding waters.  A vehicle became stuck in the area, and a home on Nanamoa Street also was flooded due to a clogged drain.  Costs of any damages were not available.
There were no serious injuries.

Heavy Rain in HONOLULU, HAWAII
From 16-MAR-20 10:40:00 to 16-MAR-20 12:20:00 (HST-10)
Location: MOKULEIA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Flash Flood in HAWAII, HAWAII
From 17-MAR-20 23:10:00 to 18-MAR-20 06:53:00 (HST-10)
Location: PAHALA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hawaii County Police reported Highway 11 was closed in the Kawa Flats area, between mile markers 58 and 62, in the Kau District on the Big Island due to deep water across the roadway.