A mesoscale convective system developed near the Aloha State and moved through the area as deep, tropical moisture became entrenched over the region as Tropical Depression Kilo passed south of the islands.  Heavy rain, thunderstorms, and flash flooding were the result of all these ingredients.

Flash Flood in HAWAII, HAWAII
From 23-AUG-15 17:15:00 to 23-AUG-15 20:14:00 (HST-10)
Location: HALAULA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Kohala Mountain Road, Highway 250 on the Big Island, between mile marker 9 and 10 was closed due to water covering the surface.

Flash Flood in MAUI, HAWAII
From 23-AUG-15 21:35:00 to 23-AUG-15 23:10:00 (HST-10)
Location: WAIANAPANAPA SP
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Ulaino Road near Hana on Maui was closed due to deep water over the surface.

Flash Flood in MAUI, HAWAII
From 24-AUG-15 07:00:00 to 24-AUG-15 12:55:00 (HST-10)
Location: KAUPO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Deep water from heavy rain covered Piilani Highway between mile markers 38 and 39 near Kaupo on the island of Maui.

Flash Flood in MAUI, HAWAII
From 24-AUG-15 07:46:00 to 24-AUG-15 12:55:00 (HST-10)
Location: WAIANAPANAPA SP
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Flooding waters forced the closure of Wainapanapa State Park north of Hana on the island of Maui.

Flash Flood in HONOLULU, HAWAII
From 24-AUG-15 03:53:00 to 24-AUG-15 09:19:00 (HST-10)
Location: MOILILI
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

H-1 off-ramp onto Wilder Avenue on Oahu near the University of Hawaii became inundated and was then impassable.

Flash Flood in HONOLULU, HAWAII
From 24-AUG-15 04:06:00 to 24-AUG-15 09:19:00 (HST-10)
Location: WAIKIKI
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hobron Lane at Ala Moana Boulevard in Waikiki on Oahu became flooded with more than a foot of water and was impassable.

Flash Flood in HONOLULU, HAWAII
From 24-AUG-15 04:34:00 to 24-AUG-15 09:19:00 (HST-10)
Location: WAIMALU
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Two lanes along H-1 westbound near the Waimalu off-ramp on Oahu were flooded and became impassable.

Flash Flood in HONOLULU, HAWAII
From 24-AUG-15 05:34:00 to 24-AUG-15 09:19:00 (HST-10)
Location: ALA MOANA BEACH PARK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

H-1 westbound off-ramp to Vineyard Boulevard on Oahu became flooded and impassable.

Flash Flood in MAUI, HAWAII
From 24-AUG-15 07:55:00 to 24-AUG-15 12:55:00 (HST-10)
Location: WAILUKU HEIGHTS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Inundation forced the closure of Iao Valley State Park near Wailuku on the island of Maui.

Flash Flood in MAUI, HAWAII
From 24-AUG-15 07:56:00 to 24-AUG-15 12:55:00 (HST-10)
Location: PUKOO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Flooding near mile marker 16 at Pukoo along Kamehameha IV Highway on the island of Molokai forced the closure of the roadway in that area.

Flash Flood in HONOLULU, HAWAII
From 24-AUG-15 07:56:00 to 24-AUG-15 09:19:00 (HST-10)
Location: KAMILOIKI
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Kalanianaole Highway became impassable with flooding waters between the Hawaii Kai Golf Course and the Makapuu Lighthouse Trail on Oahu.

Flash Flood in HAWAII, HAWAII
From 24-AUG-15 10:15:00 to 24-AUG-15 13:56:00 (HST-10)
Location: NAALEHU
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Highway 11, Mamalahoa Highway, became flooded and impassable between mile markers 58 and 59 near Kawa Flats in the Kau District on the Big Island of Hawaii.

Flash Flood in HAWAII, HAWAII
From 24-AUG-15 12:55:00 to 24-AUG-15 13:56:00 (HST-10)
Location: KURTISTOWN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Waipahoehoe Stream overflowed south of Keaau in Puna on the Big Island of Hawaii and forced the closure of Pohaku Drive at 39th Avenue.

Heavy Rain in KAUAI, HAWAII
From 25-AUG-15 01:03:00 to 25-AUG-15 03:54:00 (HST-10)
Location: KALALAU LOOKOUT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Flash Flood in MAUI, HAWAII
From 25-AUG-15 08:15:00 to 25-AUG-15 09:59:00 (HST-10)
Location: NAPILI
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

Lower Honoapiilani Highway was flooded by excessive rainfall near Kahana and Honokowai.  And the towns themselves also experienced flooding in different neighborhoods.

Heavy Rain in HONOLULU, HAWAII
From 26-AUG-15 14:28:00 to 26-AUG-15 18:47:00 (HST-10)
Location: MOKULEIA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Heavy Rain in HONOLULU, HAWAII
From 26-AUG-15 16:57:00 to 26-AUG-15 18:50:00 (HST-10)
Location: NANAKULI
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Heavy Rain in MAUI, HAWAII
From 22-AUG-15 05:04:00 to 22-AUG-15 07:59:00 (HST-10)
Location: HOOKIPA BP
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Heavy Rain in HONOLULU, HAWAII
From 22-AUG-15 19:48:00 to 22-AUG-15 22:16:00 (HST-10)
Location: KAHUKU
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Heavy Rain in MAUI, HAWAII
From 22-AUG-15 20:44:00 to 22-AUG-15 22:51:00 (HST-10)
Location: KIHEI
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Heavy Rain in MAUI, HAWAII
From 23-AUG-15 01:09:00 to 23-AUG-15 03:53:00 (HST-10)
Location: HALAWA VALLEY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Heavy Rain in HAWAII, HAWAII
From 23-AUG-15 15:27:00 to 23-AUG-15 17:30:00 (HST-10)
Location: WAIKOLOA VILLAGE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Heavy Rain in HONOLULU, HAWAII
From 23-AUG-15 15:46:00 to 23-AUG-15 17:47:00 (HST-10)
Location: NANAKULI
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Heavy Rain in MAUI, HAWAII
From 23-AUG-15 22:36:00 to 24-AUG-15 03:15:00 (HST-10)
Location: PAPOHAKU BEACH PARK
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Flash Flood in HONOLULU, HAWAII
From 24-AUG-15 11:30:00 to 24-AUG-15 13:00:00 (HST-10)
Location: ALA MOANA BEACH PARK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Sewers overflowed, with the water coming through the manholes, near Atkinson Drive and Ala Moana Boulevard on Oahu.  Thousands of gallons of water escaped from the sewer system.

Flash Flood in HAWAII, HAWAII
From 24-AUG-15 12:30:00 to 24-AUG-15 13:56:00 (HST-10)
Location: KURTISTOWN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

With deep, standing water; officials closed the intersection of C Road and 9th south of Keaau in the Puna District on the Big Island of Hawaii.

Flash Flood in HONOLULU, HAWAII
From 24-AUG-15 03:01:00 to 24-AUG-15 09:19:00 (HST-10)
Location: ALA MOANA BEACH PARK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

Flash flooding waters affected the area just north of Ala Moana Mall along Keeaumoku Street near Walmart on Oahu.  Other areas with flooding problems included the intersections of King and Alakea, 11th and Waialae, and Beretania and Piikoi.

Flash Flood in MAUI, HAWAII
From 24-AUG-15 06:45:00 to 24-AUG-15 12:55:00 (HST-10)
Location: KIPAHULU
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Parts of Kipahulu on Maui became inaccessible because of flooding on the Hana Highway near the town.

Flash Flood in MAUI, HAWAII
From 23-AUG-15 19:15:00 to 23-AUG-15 21:15:00 (HST-10)
Location: KAUPO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Flash flooding waters covered Piilani Highway on Maui near Kaupo between mile markers 37 and 38, and near mile marker 29.  The water was deep enough to make the road impassable.

Flash Flood in HONOLULU, HAWAII
From 24-AUG-15 05:50:00 to 24-AUG-15 09:19:00 (HST-10)
Location: WAIKANE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Waikane Stream overflowed its banks in windward Oahu because of heavy rain and flooded Kamehameha Highway in its vicinity.  Several schools on Oahu closed for the day because of the many flooded roads and power outages.

Flash Flood in MAUI, HAWAII
From 24-AUG-15 07:10:00 to 24-AUG-15 12:55:00 (HST-10)
Location: WAIANAPANAPA SP
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

High water from flooding closed the Hana Highway between mile markers 29 and 36 near Hana on the island of Maui.  Several schools in the Hana area, and around Kaunakakai on Molokai, were closed for the day because of the road flooding and power outages.