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The 1989 Central Pacific Tropical Cyclone Season
Tropical Depression FOUR-E developed east of the CPHC's area of responsibility on July 9. It crossed into the central Pacific near 12N 140W at 110900Z moving in a west northwesterly direction at about 10 knots. FOUR-E remained a tropical depression the whole time that it was in the central Pacific and finally dissipated south of South Point, Hawaii while moving west along 15N on July 14.
Tropical Depression FIVE-E formed on July 12 in the same general area near 12N 130W where FOUR-E was a few days earlier. FIVE-E first moved in a westerly direction and later toward the west southwest at an increased forward speed between 15 and 20 knots. It crossed into the CPHC area near 11N 140W at 140000Z and dropped as far south as 09N while weakening. The final advisory on a dissipating FIVE-E was issued by the CPHC at 142100Z. Remnant clouds and showers moved west and passed far to the south of South Point, Hawaii on the 16th.
HURRICANE DALILIA developed near 10N 115W in the eastern North Pacific on July 13. The National Hurricane Center (NHC) began to issue bulletins on Tropical Depression SIX-E, soon to be DALILIA, located 900 miles to the east of FOUR-E. DALILIA moved slowly west and crossed 140W near 14N on July 17 at 0000Z with maximum sustained winds of 65 knots. DALILIA, moving on a west northwest course, gradually increased its forward motion to near 20 knots and aimed directly at the Hawaiian Islands as a steady state hurricane with maximum sustained winds of 65 knots.
Wave energy, generated in the strong easterly winds north of the center, moved along with the storm. These high swells spread westward to the east side of the Big Island of Hawaii producing surf between 10 and 20 feet on the Puna and Ka'u coasts of the Big Island of Hawaii. The waves arrived slightly ahead of the weakening cyclone as the center passed less than 100 miles south of South Point, Hawaii at about 200300 UTC.
Hurricane DALILIA was downgraded to a Tropical Storm at 1800Z on July 19. By 0300Z on July 20, the center of the storm was located by a reconnaissance flight near 18.5N 156.5W, about 60 miles south of the Ka'u and South Kona coastlines, moving in a northwest direction and paralleling the Hawaiian Island chain. Winds over land areas gusted to 40 knots at South Point and other spots on the Ka'u and South Kona districts. Wind damage was minimal, mostly in the form of downed power lines.
Rainfall was heavy over the southeast slopes of Mauna Loa from South Point across the Volcano National Park to the Puna district where between 6 and 9 inches fell overnight on July 19-20. Minor flooding and road closures from standing water were reported in the area. Other Islands in the Hawaiian chain also reported heavy rains with the passage of DALILIA. The heaviest rains occurred northeast of the center as the storm remained well off shore. On Oahu, rainfall overnight between July 20 and July 21 was between 1.25 and 3 inches with some isolated accumulations between 5 and 8 inches in the foothills on the North Shore from Waimea to Sunset Beach.
During the Passage of Dalilia, the 24-hour rainfall recorded at Honolulu International Airport was 2.18 inches on July 20. The unusual nature of the heavy rain over the dry lowlands of Oahu allowed the July rainfall of 2.33 inches to set a new record for Honolulu International Airport.
DALILIA weakened as it moved west northwest away from the main Hawaiian Islands group and became involved with a cold trough in the westerlies. The interaction brough heavy rains to Kauai and Niihau with 3 to 6 inches recorded on the dry western side. As much as 10 inches of rain in some areas produced localized flooding with some families evacuated from the Wainiha Valley on the north side of Kauai.
The remnants of DALILIA drifted west northwest along the Northwest Hawaiian Islands (Nihoa to Kure Atoll) and droped some unusually heavy showers over French Frigate Shoals. The system was reactivated on July 24 and 25 as it interacted with the remnants of ERICK. The depression may have reached Tropical Storm strength for a short period just east of Midway Island as it recurved and moved into a strong trough near 35N 175W. On July 28, the remnants accelerated northwest towards the Aleutian Islands.
Tropical Depression ISMAEL was a rapidly weakening tropical storm as it moved toward the Central Pacific near 19N 140W on August 25 at 0000 UTC. The Central Pacific Hurricane Center (CPHC) downgraded ISMAEL
to a tropical depression with maximum sustained winds of 30 knots when it issued its first advisory based on the 250600 UTC position. ISMAEL continued to weaken as it moved west at 10 knots. The last advisory on the depression was issued only 12 hours after it crossed into CPHC's area of responsibility.