Alert archive / Hawaii / High Surf Warnings in 2021
High Surf Warning 3, NWS Honolulu, HI
NWS Honolulu, HI issued this high surf warning at Jan 15, 2021, 10:00 AM HST for Honolulu County, Kauai County, Kalawao County, Hawaii. It took effect at Jan 15, 2021, 3:48 PM HST. It was in force for 4 days. 4 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jan 15, 2021, 10:00 AM HST (20:00 UTC)
- In effect from
- Jan 15, 2021, 3:48 PM HST
- Expired
- Jan 19, 2021, 9:29 AM HST
- In force
- 4 days
- Issued by
- NWS Honolulu, HI
Counties Honolulu County, HI, Kalawao County, HI, Kauai County, HI
The radar
The Molokai radar (PHMO), 116 km from the middle of the area, began a volume at 20:01 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jan 16, 12:14 PM HST | HIGH SURF | Pupukea, HI | WAVES OVERTOPPING KAMEHAMEHA HIGHWAY AT TIMES. |
| Jan 18, 12:55 PM HST | HEAVY RAIN 4.5 | 1 Ene Kuliouou, HI | 3 INCHES OF RAIN RECORDED BETWEEN 8 AM AND NOON. |
| Jan 18, 2:17 PM HST | NON-TSTM WND DMG | Hawaii Kai, HI | DOWNED TREE BLOCKING ONE LANE OF KALANIANAOLE HIGHWAY. |
| Jan 18, 5:36 PM HST | NON-TSTM WND GST 60 | 1 Ese Kaena Point, HI | MESONET STATION KKRH1 KUAOKALA. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Lihue, (PHLI), launched 12:00Z, 8.0 hours before the alert went out and 127 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 630 J/kg
- Mixed-layer CIN
- -5 J/kg
- Mixed-layer LCL
- 633 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- -37 m²/s²
- 0-3 km storm-relative helicity
- 7 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
924 WHHW40 PHFO 152000 CFWHFO Coastal Hazard Message National Weather Service Honolulu HI 1000 AM HST Fri Jan 15 2021 ...HIGH SURF ADVISORY FOR NORTH AND WEST FACING SHORES OF NIIHAU KAUAI OAHU MOLOKAI AND NORTH FACING SHORES OF MAUI AND BIG ISLAND... ...HIGH SURF WARNING IN EFFECT FROM TONIGHT FOR NORTH AND WEST FACING SHORES OF NIIHAU KAUAI OAHU MOLOKAI AND NORTH FACING SHORES OF MAUI.... .The current north-northwest swell will slowly trend lower today. The largest northwest swell of the season thus far will rapidly fill in tonight and build through Saturday. This swell will likely peak Saturday then steadily decline through Sunday. Another warning level swell is expected on Monday. HIZ001>003-006>008-012-013-017-019-020-160900- /O.NEW.PHFO.SU.W.0003.210116T0400Z-210117T1600Z/ /O.CON.PHFO.SU.Y.0005.000000T0000Z-210116T0400Z/ Niihau-Kauai Windward-Kauai Leeward-Waianae Coast- Oahu North Shore-Oahu Koolau-Molokai Windward-Molokai Leeward- Maui Windward West-Maui Central Valley-Windward Haleakala- 1000 AM HST Fri Jan 15 2021 ...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 6 PM HST THIS EVENING... ...HIGH SURF WARNING IN EFFECT FROM 6 PM THIS EVENING TO 6 AM HST SUNDAY... * WHAT...Surf of 15 to 20 feet this morning along north facing shores, lowering to 10 to 15 feet this evening, then rapidly building to 40 to 50 feet Saturday. Surf 10 to 15 feet this morning along west facing shores, lowering to 8 to 12 feet this evening, then rapidly building to 25 to 35 feet Saturday. * WHERE...North and west facing shores of Niihau, Kauai, Oahu, Molokai and north facing shores of Maui. * WHEN...For the High Surf Warning, from 6 PM this evening to 6 AM HST Sunday. For the High Surf Advisory, until 6 PM HST this evening. * IMPACTS...High. Expect ocean water occasionally sweeping across portions of beaches, very strong breaking waves, and strong longshore and rip currents. Breaking waves may occasionally impact harbors making navigating the harbor channel dangerous. PRECAUTIONARY/PREPAREDNESS ACTIONS... Large, breaking surf, significant shorebreak, and dangerous currents make entering the water very hazardous. Anyone entering the water could face significant injury or death. && $$ HIZ025-160400- /O.CON.PHFO.SU.Y.0005.000000T0000Z-210116T0400Z/ Big Island North and East- 1000 AM HST Fri Jan 15 2021 ...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 6 PM HST THIS EVENING... * WHAT...Surf of 16 to 24 feet along north facing shores. * WHERE...North facing shores of Big Island. * WHEN...Until 6 PM HST this evening. * IMPACTS...Moderate. Expect strong breaking waves, shore break, and strong longshore and rip currents making swimming difficult and dangerous. PRECAUTIONARY/PREPAREDNESS ACTIONS... Beachgoers, swimmers, and surfers should heed all advice given by ocean safety officials and exercise caution. && $$
11 follow-up statements
288 WHHW40 PHFO 160148 CFWHFO Coastal Hazard Message National Weather Service Honolulu HI 348 PM HST Fri Jan 15 2021 ...HIGH SURF WARNING FOR NORTH AND WEST FACING SHORES OF NIIHAU KAUAI OAHU MOLOKAI AND NORTH FACING SHORES OF MAUI.... ...HIGH SURF ADVISORY FOR NORTH FACING SHORES OF THE BIG ISLAND THROUGH TONIGHT... .The current north-northwest swell has dropped across most areas, but continues to linger around the Big Island. The largest northwest swell of the season thus far will rapidly fill in tonight and peak on Saturday. Surf of 40 to 50 feet with occasional high sets are expected along select north facing exposures. The combination of giant surf and the recent spring tides will likely cause waves to overtop lower roadways that are closer to the shoreline and may cause impacts to coastal properties and infrastructures. HIZ001>003-006>008-012-013-017-019-020-161500- /O.CAN.PHFO.SU.Y.0005.000000T0000Z-210116T0400Z/ /O.EXT.PHFO.SU.W.0003.210116T0148Z-210117T1600Z/ Niihau-Kauai Windward-Kauai Leeward-Waianae Coast- Oahu North Shore-Oahu Koolau-Molokai Windward-Molokai Leeward- Maui Windward West-Maui Central Valley-Windward Haleakala- 348 PM HST Fri Jan 15 2021 ...HIGH SURF WARNING NOW IN EFFECT UNTIL 6 AM HST SUNDAY... ...HIGH SURF ADVISORY IS CANCELLED... * WHAT...Surf rapidly building to 40 to 50 feet tonight through Saturday along north facing shores. Surf rapidly building to 25 to 35 feet tonight through Saturday along west facing shores. * WHERE...North and west facing shores of Niihau, Kauai, Oahu, Molokai and north facing shores of Maui. * WHEN...Until 6 AM HST Sunday. * Very High...Expect ocean water surging and sweeping across beaches, coastal benches, and lava flows creating the potential for impacts to coastal properties and infrastructure, including roadways. Powerful longshore and rip currents will be present at most beaches. Large breaking waves and strong currents may impact harbor entrances and channels causing challenging boat handling. PRECAUTIONARY/PREPAREDNESS ACTIONS... Large, breaking surf, significant shorebreak, and dangerous currents make entering the water very hazardous. Anyone entering the water could face significant injury or death. && $$ HIZ025-161500- /O.EXT.PHFO.SU.Y.0005.000000T0000Z-210116T1600Z/ Big Island North and East- 348 PM HST Fri Jan 15 2021 ...HIGH SURF ADVISORY NOW IN EFFECT UNTIL 6 AM HST SATURDAY... * WHAT...Surf of 12 to 18 feet lowering to 10 to 14 along north facing shores late tonight. * WHERE...North facing shores of the Big Island. * WHEN...Until 6 AM HST Saturday. * IMPACTS...Moderate. Expect strong breaking waves, shore break, and strong longshore and rip currents making swimming difficult and dangerous. PRECAUTIONARY/PREPAREDNESS ACTIONS... Beachgoers, swimmers, and surfers should heed all advice given by ocean safety officials and exercise caution. && $$ Kino
118 WHHW40 PHFO 161326 CFWHFO Coastal Hazard Message National Weather Service Honolulu HI 326 AM HST Sat Jan 16 2021 ...HIGH SURF WARNING FOR NORTH AND WEST FACING SHORES OF NIIHAU KAUAI OAHU MOLOKAI AND NORTH FACING SHORES OF MAUI.... ...HIGH SURF ADVISORY FOR NORTH AND WEST FACING SHORES OF THE BIG ISLAND STARTING NOON TODAY... .A giant northwest swell will build today, peaking on Kauai during the late morning, on Oahu shortly after midday, and mid- to late- afternoon on Maui. Some of the swell's energy is expected to reach portions of the Big Island later in the day, peaking tonight. A gradual decrease in wave heights is expected on Sunday, but another large swell is expected to arrive by Monday. HIZ025-170230- /O.CAN.PHFO.SU.Y.0005.000000T0000Z-210116T1600Z/ /O.NEW.PHFO.SU.Y.0006.210116T2200Z-210118T0400Z/ Big Island North and East- 326 AM HST Sat Jan 16 2021 ...HIGH SURF ADVISORY IN EFFECT FROM NOON TODAY TO 6 PM HST SUNDAY... * WHAT...Surf of 12 to 16 feet. * WHERE...North facing shores of the Big Island. * WHEN...From noon today to 6 PM HST Sunday. * IMPACTS...Moderate. Expect strong breaking waves, shore break, and strong longshore and rip currents making swimming difficult and dangerous. PRECAUTIONARY/PREPAREDNESS ACTIONS... Beachgoers, swimmers, and surfers should heed all advice given by ocean safety officials and exercise caution. Know your limits and seek ocean recreation areas best suited for your abilities. && $$ HIZ009-170230- /O.EXA.PHFO.SU.W.0003.000000T0000Z-210117T1600Z/ Olomana- 326 AM HST Sat Jan 16 2021 ...HIGH SURF WARNING IN EFFECT UNTIL 6 AM HST SUNDAY... * WHAT...Surf of 30 to 40 feet. * WHERE...North facing shores of east Oahu. * WHEN...Until 6 AM HST Sunday. * IMPACTS...Very High. Expect ocean water surging and sweeping across beaches, coastal benches, and lava flows creating the potential for impacts to coastal properties and infrastructure, including roadways. Powerful longshore and rip currents will be present at most beaches. Large breaking waves and strong currents may impact harbor entrances and channels causing challenging boat handling. PRECAUTIONARY/PREPAREDNESS ACTIONS... Large, breaking surf, significant shorebreak, and dangerous currents make entering the water very hazardous. Anyone entering the water could face significant injury or death. && $$ HIZ001>003-006>008-012-013-017-019-020-170230- /O.CON.PHFO.SU.W.0003.000000T0000Z-210117T1600Z/ Niihau-Kauai Windward-Kauai Leeward-Waianae Coast- Oahu North Shore-Oahu Koolau-Molokai Windward-Molokai Leeward- Maui Windward West-Maui Central Valley-Windward Haleakala- 326 AM HST Sat Jan 16 2021 ...HIGH SURF WARNING REMAINS IN EFFECT UNTIL 6 AM HST SUNDAY... * WHAT...Surf 40 to 50 feet along north facing shores, and 25 to 35 feet along west facing shores. * WHERE...North and west facing shores of Niihau, Kauai, Oahu and Molokai, and north facing shores of Maui. * WHEN...Until 6 AM HST Sunday. * IMPACTS...Very High...Expect ocean water surging and sweeping across beaches, coastal benches, and lava flows creating the potential for impacts to coastal properties and infrastructure, including roadways. Powerful longshore and rip currents will be present at most beaches. Large breaking waves and strong currents may impact harbor entrances and channels causing challenging boat handling. PRECAUTIONARY/PREPAREDNESS ACTIONS... Large, breaking surf, significant shorebreak, and dangerous currents make entering the water very hazardous. Anyone entering the water could face significant injury or death. && $$ HIZ023-026-170230- /O.NEW.PHFO.SU.Y.0006.210116T2200Z-210118T0400Z/ Kona-Kohala- 326 AM HST Sat Jan 16 2021 ...HIGH SURF ADVISORY IN EFFECT FROM NOON TODAY TO 6 PM HST SUNDAY... * WHAT...Surf 6 to 10 feet. * WHERE...West facing shores of the Big Island. * WHEN...From noon today to 6 PM HST Sunday. * IMPACTS...Moderate. Expect strong breaking waves, shore break, and strong longshore and rip currents making swimming difficult and dangerous. PRECAUTIONARY/PREPAREDNESS ACTIONS... Beachgoers, swimmers, and surfers should heed all advice given by ocean safety officials and exercise caution. Know your limits and seek ocean recreation areas best suited for your abilities. && $$ Birchard
869 WHHW40 PHFO 161523 CCA CFWHFO Coastal Hazard Message...CORRECTED National Weather Service Honolulu HI 523 AM HST Sat Jan 16 2021 ...HIGH SURF WARNING FOR NORTH AND WEST FACING SHORES OF NIIHAU KAUAI OAHU MOLOKAI AND NORTH FACING SHORES OF MAUI... ...HIGH SURF ADVISORY FOR NORTH AND WEST FACING SHORES OF THE BIG ISLAND STARTING NOON TODAY... .A giant northwest swell will build today, peaking on Kauai during the late morning, on Oahu shortly after midday, and mid- to late- afternoon on Maui. Some of the swell's energy is expected to reach portions of the Big Island later in the day, peaking tonight. A gradual decrease in wave heights is expected on Sunday, but another large swell is expected to arrive by Monday. HIZ025-170230- /O.CAN.PHFO.SU.Y.0005.000000T0000Z-210116T1600Z/ /O.NEW.PHFO.SU.Y.0006.210116T2200Z-210118T0400Z/ Big Island North and East- 523 AM HST Sat Jan 16 2021 ...HIGH SURF ADVISORY IN EFFECT FROM NOON TODAY TO 6 PM HST SUNDAY... * WHAT...Surf of 12 to 16 feet. * WHERE...North facing shores of the Big Island. * WHEN...From noon today to 6 PM HST Sunday. * IMPACTS...Moderate. Expect strong breaking waves, shore break, and strong longshore and rip currents making swimming difficult and dangerous. PRECAUTIONARY/PREPAREDNESS ACTIONS... Beachgoers, swimmers, and surfers should heed all advice given by ocean safety officials and exercise caution. Know your limits and seek ocean recreation areas best suited for your abilities. && $$ HIZ009-170230- /O.EXA.PHFO.SU.W.0003.000000T0000Z-210117T1600Z/ Olomana- 523 AM HST Sat Jan 16 2021 ...HIGH SURF WARNING IN EFFECT UNTIL 6 AM HST SUNDAY... * WHAT...Surf of 30 to 40 feet. * WHERE...North facing shores of east Oahu. * WHEN...Until 6 AM HST Sunday. * IMPACTS...Very High. Expect ocean water surging and sweeping across beaches, coastal benches, and lava flows creating the potential for impacts to coastal properties and infrastructure, including roadways. Powerful longshore and rip currents will be present at most beaches. Large breaking waves and strong currents may impact harbor entrances and channels causing challenging boat handling. PRECAUTIONARY/PREPAREDNESS ACTIONS... Large, breaking surf, significant shorebreak, and dangerous currents make entering the water very hazardous. Anyone entering the water could face significant injury or death. && $$ HIZ001>003-006>008-012-013-017-019-020-170230- /O.CON.PHFO.SU.W.0003.000000T0000Z-210117T1600Z/ Niihau-Kauai Windward-Kauai Leeward-Waianae Coast- Oahu North Shore-Oahu Koolau-Molokai Windward-Molokai Leeward- Maui Windward West-Maui Central Valley-Windward Haleakala- 523 AM HST Sat Jan 16 2021 ...HIGH SURF WARNING REMAINS IN EFFECT UNTIL 6 AM HST SUNDAY... * WHAT...Surf 40 to 50 feet along north facing shores, and 25 to 35 feet along west facing shores. * WHERE...North and west facing shores of Niihau, Kauai, Oahu and Molokai, and north facing shores of Maui. * WHEN...Until 6 AM HST Sunday. * IMPACTS...Very High...Expect ocean water surging and sweeping across beaches, coastal benches, and lava flows creating the potential for impacts to coastal properties and infrastructure, including roadways. Powerful longshore and rip currents will be present at most beaches. Large breaking waves and strong currents may impact harbor entrances and channels causing challenging boat handling. PRECAUTIONARY/PREPAREDNESS ACTIONS... Large, breaking surf, significant shorebreak, and dangerous currents make entering the water very hazardous. Anyone entering the water could face significant injury or death. && $$ HIZ023-026-170230- /O.NEW.PHFO.SU.Y.0006.210116T2200Z-210118T0400Z/ Kona-Kohala- 523 AM HST Sat Jan 16 2021 ...HIGH SURF ADVISORY IN EFFECT FROM NOON TODAY TO 6 PM HST SUNDAY... * WHAT...Surf 6 to 10 feet. * WHERE...West facing shores of the Big Island. * WHEN...From noon today to 6 PM HST Sunday. * IMPACTS...Moderate. Expect strong breaking waves, shore break, and strong longshore and rip currents making swimming difficult and dangerous. PRECAUTIONARY/PREPAREDNESS ACTIONS... Beachgoers, swimmers, and surfers should heed all advice given by ocean safety officials and exercise caution. Know your limits and seek ocean recreation areas best suited for your abilities. && $$ Birchard
543 WHHW40 PHFO 170148 CFWHFO Coastal Hazard Message National Weather Service Honolulu HI 348 PM HST Sat Jan 16 2021 ...HIGH SURF WARNING FOR NORTH AND WEST FACING SHORES OF NIIHAU KAUAI OAHU MOLOKAI AND NORTH FACING SHORES OF MAUI... ...HIGH SURF ADVISORY FOR NORTH AND WEST FACING SHORES OF THE BIG ISLAND... .A giant northwest will continue to move down the island chain peaking on Oahu late this afternoon to early this evening, and this evening on Maui. Some of the swell's energy is expected to reach portions of the Big Island later in the day, peaking overnight. A gradual decrease in wave heights is expected on Sunday, but another large swell is expected to arrive by Monday. HIZ001>003-006>009-012-013-017-019-020-171500- /O.EXT.PHFO.SU.W.0003.000000T0000Z-210118T0400Z/ Niihau-Kauai Windward-Kauai Leeward-Waianae Coast- Oahu North Shore-Oahu Koolau-Olomana-Molokai Windward- Molokai Leeward-Maui Windward West-Maui Central Valley- Windward Haleakala- 348 PM HST Sat Jan 16 2021 ...HIGH SURF WARNING NOW IN EFFECT UNTIL 6 PM HST SUNDAY... * WHAT...Surf 40 to 50 feet along north facing shores, and 25 to 35 feet along west facing shores. * WHERE...North and west facing shores of Niihau, Kauai, Oahu and Molokai, and north facing shores of Maui. * WHEN...Until 6 PM HST Sunday. * IMPACTS...Very High...Expect ocean water surging and sweeping across beaches, coastal benches, and lava flows creating the potential for impacts to coastal properties and infrastructure, including roadways. Powerful longshore and rip currents will be present at most beaches. Large breaking waves and strong currents may impact harbor entrances and channels causing challenging boat handling. PRECAUTIONARY/PREPAREDNESS ACTIONS... Large, breaking surf, significant shorebreak, and dangerous currents make entering the water very hazardous. Anyone entering the water could face significant injury or death. && $$ HIZ023-025-026-171500- /O.CON.PHFO.SU.Y.0006.000000T0000Z-210118T0400Z/ Kona-Big Island North and East-Kohala- 348 PM HST Sat Jan 16 2021 ...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 6 PM HST SUNDAY... * WHAT...Surf of 12 to 16 feet. * WHERE...North facing shores of the Big Island. * WHEN...From noon today to 6 PM HST Sunday. * IMPACTS...Moderate. Expect strong breaking waves, shore break, and strong longshore and rip currents making swimming difficult and dangerous. PRECAUTIONARY/PREPAREDNESS ACTIONS... Beachgoers, swimmers, and surfers should heed all advice given by ocean safety officials and exercise caution. Boaters should expect recreational surfers and body boarders utilizing harbor channels to access surfing areas. && $$
671 WHHW40 PHFO 170528 CFWHFO Coastal Hazard Message National Weather Service Honolulu HI 728 PM HST Sat Jan 16 2021 ...HIGH SURF WARNING FOR NORTH AND WEST FACING SHORES OF NIIHAU KAUAI OAHU MOLOKAI AND NORTH FACING SHORES OF MAUI... ...HIGH SURF ADVISORY FOR NORTH AND WEST FACING SHORES OF THE BIG ISLAND... .A giant northwest swell will gradually diminish in Kauai and Oahu waters overnight, while peaking in Maui County and Big Island waters. Surf will drop on Sunday, and will briefly diminish below warning levels statewide by Sunday evening. However, another giant swell will follow Sunday night and Monday, once again producing warning-level surf along most north and west facing shores. HIZ001>003-006>009-012-013-017-019-020-171830- /O.CON.PHFO.SU.W.0003.000000T0000Z-210118T0400Z/ Niihau-Kauai Windward-Kauai Leeward-Waianae Coast- Oahu North Shore-Oahu Koolau-Olomana-Molokai Windward- Molokai Leeward-Maui Windward West-Maui Central Valley- Windward Haleakala- 728 PM HST Sat Jan 16 2021 ...HIGH SURF WARNING REMAINS IN EFFECT UNTIL 6 PM HST SUNDAY... * WHAT...Peak surf heights of 40 to 50 feet along north facing shores of Maui County through early Sunday, then diminishing. Surf 30 to 45 feet along north facing shores of Kauai County and Oahu overnight. Surf 20 to 30 feet along west facing shores of Kauai County, Oahu and Molokai overnight. Surf will gradually diminish on Sunday, but still remain dangerously large. * WHERE...North and west facing shores of Niihau, Kauai, Oahu and Molokai, and north facing shores of Maui. * WHEN...Until 6 PM HST Sunday. * IMPACTS...Very High...Expect ocean water surging and sweeping across beaches, coastal benches, and lava flows creating the potential for impacts to coastal properties and infrastructure, including roadways. Powerful longshore and rip currents will be present at most beaches. Large breaking waves and strong currents may impact harbor entrances and channels causing challenging boat handling. PRECAUTIONARY/PREPAREDNESS ACTIONS... Large, breaking surf, significant shorebreak, and dangerous currents make entering the water very hazardous. Anyone entering the water could face significant injury or death. && $$ HIZ023-025-026-171830- /O.CON.PHFO.SU.Y.0006.000000T0000Z-210118T0400Z/ Kona-Big Island North and East-Kohala- 728 PM HST Sat Jan 16 2021 ...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 6 PM HST SUNDAY... * WHAT...Along north facing shores of the Big Island, surf 12 to 16 feet. Along west facing shores of the Big Island, surf 7 to 10 feet. * WHERE...North and west facing shores of the Big Island. * WHEN...Until 6 PM HST Sunday. * IMPACTS...Moderate. Expect strong breaking waves, shore break, and strong longshore and rip currents making swimming difficult and dangerous. PRECAUTIONARY/PREPAREDNESS ACTIONS... Beachgoers, swimmers, and surfers should heed all advice given by ocean safety officials and exercise caution. Know your limits and seek ocean recreation areas best suited for your abilities. && $$ Birchard
961 WHHW40 PHFO 171324 CFWHFO Coastal Hazard Message National Weather Service Honolulu HI 324 AM HST Sun Jan 17 2021 ...HIGH SURF WARNING FOR NORTH AND WEST FACING SHORES OF NIIHAU KAUAI OAHU MOLOKAI AND NORTH FACING SHORES OF MAUI... ...HIGH SURF ADVISORY FOR NORTH AND WEST FACING SHORES OF THE BIG ISLAND... .Northwest swell will gradually diminish statewide through the day today, with surf likely falling below warning levels by this afternoon. However, another powerful northwest swell will arrive tonight and Monday, once again producing warning-level surf along exposed north and west facing shores. HIZ001>003-006>009-012-013-017-019-020-180230- /O.EXT.PHFO.SU.W.0003.000000T0000Z-210119T1600Z/ Niihau-Kauai Windward-Kauai Leeward-Waianae Coast- Oahu North Shore-Oahu Koolau-Olomana-Molokai Windward- Molokai Leeward-Maui Windward West-Maui Central Valley- Windward Haleakala- 324 AM HST Sun Jan 17 2021 ...HIGH SURF WARNING NOW IN EFFECT UNTIL 6 AM HST TUESDAY... * WHAT...Surf 20 to 30 feet along north facing shores of Oahu, Molokai and Maui, and surf 15 to 20 feet along west facing shores of Oahu and Molokai through this morning. Surf will likely diminish below warning levels statewide by this afternoon, but surf will build to 30 to 45 feet along north facing shores of Kauai tonight and early Monday as a new swell arrives. This large swell will spread to Oahu and Maui through the day Monday, producing warning-level surf heights. * WHERE...North and west facing shores of Niihau, Kauai, Oahu and Molokai, and north facing shores of Maui. * WHEN...Until 6 AM HST Tuesday. * IMPACTS...High to Very high. Expect ocean water occasionally sweeping across portions of beaches, very strong breaking waves, and strong longshore and rip currents. PRECAUTIONARY/PREPAREDNESS ACTIONS... Large, breaking surf, significant shorebreak, and dangerous currents make entering the water very hazardous. Anyone entering the water could face significant injury or death. && $$ HIZ023-025-026-180230- /O.EXT.PHFO.SU.Y.0006.000000T0000Z-210119T1600Z/ Kona-Big Island North and East-Kohala- 324 AM HST Sun Jan 17 2021 ...HIGH SURF ADVISORY NOW IN EFFECT UNTIL 6 AM HST TUESDAY... * WHAT...Along north facing shores of the Big Island, surf 12 to 16 feet. Along west facing shores of the Big Island, surf 7 to 10 feet. Surf will gradually diminish later today and tonight, but another swell arriving on Monday will bring advisory-level surf again. * WHERE...North and west facing shores of the Big Island. * WHEN...Until 6 AM HST Tuesday. * IMPACTS...Moderate. Expect strong breaking waves, shore break, and strong longshore and rip currents making swimming difficult and dangerous. PRECAUTIONARY/PREPAREDNESS ACTIONS... Beachgoers, swimmers, and surfers should heed all advice given by ocean safety officials and exercise caution. Know your limits; when in doubt, don't go out. && $$ Birchard
504 WHHW40 PHFO 180153 CFWHFO Coastal Hazard Message National Weather Service Honolulu HI 353 PM HST Sun Jan 17 2021 ...HIGH SURF WARNING FOR NORTH AND WEST FACING SHORES OF NIIHAU KAUAI OAHU MOLOKAI AND NORTH FACING SHORES OF MAUI... ...HIGH SURF ADVISORY FOR NORTH AND WEST FACING SHORES OF THE BIG ISLAND... .A large northwest swell will arrive overnight Monday morning that will once again produce warning level surf along exposed the northern and western exposed shorelines of the smaller islands. Surf will peak at advisory levels along the Big Island's north and west facing shorelines Monday. HIZ001>003-006>009-012-013-017-019-020-181500- /O.CON.PHFO.SU.W.0003.000000T0000Z-210119T1600Z/ Niihau-Kauai Windward-Kauai Leeward-Waianae Coast- Oahu North Shore-Oahu Koolau-Olomana-Molokai Windward- Molokai Leeward-Maui Windward West-Maui Central Valley- Windward Haleakala- 353 PM HST Sun Jan 17 2021 ...HIGH SURF WARNING REMAINS IN EFFECT UNTIL 6 AM HST TUESDAY... * WHAT...Surf 30 to 40 feet along the north-facing shores of Niihau, Kauai, Oahu, Molokai and Maui, with 15 to 20 foot surf along the west-facing shores of Niihau, Kauai, Oahu and Molokai. Large northwest swells will spread across Oahu and Maui through the day Monday, producing warning level surf heights. * WHERE...North and west-facing shores of Niihau, Kauai, Oahu and Molokai, and north-facing shores of Maui. * WHEN...Until 6 AM HST Tuesday. * IMPACTS...High to Very high. Expect ocean water occasionally sweeping across portions of beaches, very strong breaking waves, and strong longshore and rip currents. PRECAUTIONARY/PREPAREDNESS ACTIONS... Large, breaking surf, significant shorebreak, and dangerous currents make entering the water very hazardous. Anyone entering the water could face significant injury or death. Boaters should be aware of an increased number of surfers and body boarders utilizing the harbor channel to access surfing areas. && $$ HIZ023-025-026-181500- /O.CON.PHFO.SU.Y.0006.000000T0000Z-210119T1600Z/ Kona-Big Island North and East-Kohala- 353 PM HST Sun Jan 17 2021 ...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 6 AM HST TUESDAY... * WHAT...Along north-facing shores of the Big Island, surf 12 to 16 feet. Along west-facing shores of the Big Island, surf 8 to 12 feet. Surf will gradually diminish through tonight, but large northwest swells will arrive Monday will and introduce advisory level surf. * WHERE...North and west-facing shores of the Big Island. * WHEN...Until 6 AM HST Tuesday. * IMPACTS...Moderate. Expect strong breaking waves, shore break, and strong longshore and rip currents making swimming difficult and dangerous. PRECAUTIONARY/PREPAREDNESS ACTIONS... Beachgoers, swimmers, and surfers should heed all advice given by ocean safety officials and exercise caution. Boaters should expect recreational surfers and body boarders utilizing harbor channels to access surfing areas. && $$
599 WHHW40 PHFO 181313 CFWHFO Coastal Hazard Message National Weather Service Honolulu HI 313 AM HST Mon Jan 18 2021 ...HIGH SURF WARNING FOR NORTH AND WEST FACING SHORES OF NIIHAU KAUAI OAHU MOLOKAI AND NORTH FACING SHORES OF MAUI... ...HIGH SURF ADVISORY FOR NORTH AND WEST FACING SHORES OF THE BIG ISLAND... .A large northwest swell will be spreading down the island chain today and tonight, producing another round of warning level surf for the exposed north and west shorelines of most of the smaller islands. Advisory level surf will reach the Big Island's north and west facing shores this afternoon. HIZ001>003-006>009-012-013-017-019-020-190215- /O.CON.PHFO.SU.W.0003.000000T0000Z-210119T1600Z/ Niihau-Kauai Windward-Kauai Leeward-Waianae Coast- Oahu North Shore-Oahu Koolau-Olomana-Molokai Windward- Molokai Leeward-Maui Windward West-Maui Central Valley- Windward Haleakala- 313 AM HST Mon Jan 18 2021 ...HIGH SURF WARNING REMAINS IN EFFECT UNTIL 6 AM HST TUESDAY... * WHAT...At its peak, surf will be 35 to 45 feet along the north- facing shores of Niihau, Kauai, and 30 to 40 feet along the north facing shores of Oahu, Molokai and Maui. Expect surf along the west facing shores of Niihau and Kauai of 28 to 36 feet, and 20 to 30 feet along the west facing shores of Oahu and Molokai. * WHERE...North and west-facing shores of Niihau, Kauai, Oahu and Molokai, and north-facing shores of Maui. * WHEN...Until 6 AM HST Tuesday. * IMPACTS...High to Very high. Expect ocean water occasionally sweeping across portions of beaches, very strong breaking waves, and strong longshore and rip currents. PRECAUTIONARY/PREPAREDNESS ACTIONS... Large, breaking surf, significant shorebreak, and dangerous currents make entering the water very hazardous. Anyone entering the water could face significant injury or death. Boaters should be aware of an increased number of surfers and body boarders utilizing the harbor channel to access surfing areas. && $$ HIZ023-025-026-190215- /O.CON.PHFO.SU.Y.0006.000000T0000Z-210119T1600Z/ Kona-Big Island North and East-Kohala- 313 AM HST Mon Jan 18 2021 ...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 6 AM HST TUESDAY... * WHAT...Along north-facing shores of the Big Island, surf 12 to 16 feet. Along west-facing shores of the Big Island, surf 8 to 12 feet. Surf will gradually diminish through tonight, but large northwest swells will arrive Monday will and introduce advisory level surf. * WHERE...North and west-facing shores of the Big Island. * WHEN...Until 6 AM HST Tuesday. * IMPACTS...Moderate. Expect strong breaking waves, shore break, and strong longshore and rip currents making swimming difficult and dangerous. PRECAUTIONARY/PREPAREDNESS ACTIONS... Beachgoers, swimmers, and surfers should heed all advice given by ocean safety officials and exercise caution. Boaters should expect recreational surfers and body boarders utilizing harbor channels to access surfing areas. && $$
180 WHHW40 PHFO 190219 CFWHFO Coastal Hazard Message National Weather Service Honolulu HI 419 PM HST Mon Jan 18 2021 ...HIGH SURF WARNING FOR NORTH AND WEST FACING SHORES OF NIIHAU KAUAI OAHU MOLOKAI AND NORTH FACING SHORES OF MAUI... ...HIGH SURF ADVISORY FOR NORTH AND WEST FACING SHORES OF THE BIG ISLAND... .An extra large northwest swell is spreading down the island chain and will produce another round of warning level surf for the majority of the smaller island exposed northern and western shorelines. Surf will achieve advisory levels along the Big Island's north and west facing shores. HIZ001>003-006>009-012-013-017-019-020-191530- /O.CON.PHFO.SU.W.0003.000000T0000Z-210119T1600Z/ Niihau-Kauai Windward-Kauai Leeward-Waianae Coast- Oahu North Shore-Oahu Koolau-Olomana-Molokai Windward- Molokai Leeward-Maui Windward West-Maui Central Valley- Windward Haleakala- 419 PM HST Mon Jan 18 2021 ...HIGH SURF WARNING REMAINS IN EFFECT UNTIL 6 AM HST TUESDAY... * WHAT...25 to near 40 foot surf along the north facing shores of Niihau, Kauai, Oahu, Molokai and Maui through early Tuesday morning. Surf along the west facing shores of Niihau and Kauai will peak in the 17 to 28 foot range, 17 to 25 feet along the west facing shores of Oahu and Molokai. Surf will gradually diminish through Tuesday. * WHERE...North and west facing shores of Niihau, Kauai, Oahu and Molokai, and north facing shores of Maui. * WHEN...Until 6 AM HST Tuesday. * IMPACTS...Very high. Expect ocean water occasionally sweeping across portions of beaches, very strong breaking waves, and strong longshore and rip currents. PRECAUTIONARY/PREPAREDNESS ACTIONS... Large, breaking surf, significant shorebreak, and dangerous currents make entering the water very hazardous. Anyone entering the water could face significant injury or death. Boaters should be aware of an increased number of surfers and body boarders utilizing the harbor channel to access surfing areas. && $$ HIZ023-025-026-191530- /O.CON.PHFO.SU.Y.0006.000000T0000Z-210119T1600Z/ Kona-Big Island North and East-Kohala- 419 PM HST Mon Jan 18 2021 ...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 6 AM HST TUESDAY... * WHAT...Surf 12 to 18 feet along the north facing shores of the Big Island. Surf 6 to 10 feet along the west facing shores of the Big Island. Surf will gradually diminish through Tuesday morning. * WHERE...North and west facing shores of the Big Island. * WHEN...Until 6 AM HST Tuesday. * IMPACTS...Moderate. Expect strong breaking waves, shore break, and strong longshore and rip currents making swimming difficult and dangerous. PRECAUTIONARY/PREPAREDNESS ACTIONS... Beachgoers, swimmers, and surfers should heed all advice given by ocean safety officials and exercise caution. Boaters should expect recreational surfers and body boarders utilizing harbor channels to access surfing areas. && $$
960 WHHW40 PHFO 191332 CFWHFO Coastal Hazard Message National Weather Service Honolulu HI 332 AM HST Tue Jan 19 2021 ...HIGH SURF WARNING FOR NORTH AND WEST FACING SHORES OF KAUAI NIIHAU OAHU AND MOLOKAI AND FOR NORTH FACING SHORES OF MAUI... ...HIGH SURF ADVISORY FOR NORTH AND WEST FACING SHORES OF THE BIG ISLAND... .Very large and rough surf will continue this morning along most north and west facing shores of the smaller islands due to a large northwest swell and strong northeast winds. Therefore, the High Surf Warning has been extended through noon HST today. Elsewhere, surf is expected to remain near the High Surf Advisory threshold along north and west facing shores of the Big Island. By this afternoon, expect most of the shorelines in the High Surf Warning to require a High Surf Advisory due to continued elevated, rough surf conditions. HIZ001>003-006>009-012-013-017-019-020-192200- /O.EXT.PHFO.SU.W.0003.000000T0000Z-210119T2200Z/ Niihau-Kauai Windward-Kauai Leeward-Waianae Coast- Oahu North Shore-Oahu Koolau-Olomana-Molokai Windward- Molokai Leeward-Maui Windward West-Maui Central Valley- Windward Haleakala- 332 AM HST Tue Jan 19 2021 ...HIGH SURF WARNING NOW IN EFFECT UNTIL NOON HST TODAY... * WHAT...Large breaking waves of 20 to 25 feet along north facing shores of Kauai, Niihau, Oahu, Molokai and Maui. Surf will be 15 to 20 feet along west facing shores of Kauai, Niihau, Oahu, and Molokai. * WHERE...North and west facing shores of Kauai, Niihau, Oahu, and Molokai, and for north facing shores of Maui. * WHEN...Through this morning. * IMPACTS...High. Expect ocean water occasionally sweeping across portions of beaches, very strong breaking waves, and strong longshore and rip currents. PRECAUTIONARY/PREPAREDNESS ACTIONS... Large, breaking surf, significant shorebreak, and dangerous currents make entering the water very hazardous. && $$ HIZ023-025-026-192200- /O.EXT.PHFO.SU.Y.0006.000000T0000Z-210119T2200Z/ Kona-Big Island North and East-Kohala- 332 AM HST Tue Jan 19 2021 ...HIGH SURF ADVISORY NOW IN EFFECT UNTIL NOON HST TODAY... * WHAT...Surf heights of 10 to 15 feet along north facing shores of the Big Island, and 5 to 8 feet along west facing shores of the Big island. * WHERE...North and west facing shores of the Big Island. * WHEN...Through this morning. * IMPACTS...Moderate. Expect strong breaking waves, shore break, and strong longshore and rip currents making swimming difficult and dangerous. PRECAUTIONARY/PREPAREDNESS ACTIONS... Beachgoers, swimmers, and surfers should heed all advice given by ocean safety officials and exercise caution. && $$ Houston
360 WHHW40 PHFO 191929 CFWHFO Coastal Hazard Message National Weather Service Honolulu HI 929 AM HST Tue Jan 19 2021 ...HIGH SURF ADVISORY FOR NORTH AND WEST FACING SHORES OF KAUAI NIIHAU OAHU MOLOKAI BIG ISLAND AND FOR NORTH FACING SHORES OF MAUI... .Rough surf along exposed north and west facing shores will slowly diminish through tonight. HIZ001>003-006>009-012-013-017-019-020-200830- /O.CAN.PHFO.SU.W.0003.000000T0000Z-210119T2200Z/ /O.EXB.PHFO.SU.Y.0006.000000T0000Z-210120T1600Z/ Niihau-Kauai Windward-Kauai Leeward-Waianae Coast- Oahu North Shore-Oahu Koolau-Olomana-Molokai Windward- Molokai Leeward-Maui Windward West-Maui Central Valley- Windward Haleakala- 929 AM HST Tue Jan 19 2021 ...HIGH SURF ADVISORY IN EFFECT UNTIL 6 AM HST WEDNESDAY... ...HIGH SURF WARNING IS CANCELLED... * WHAT...Surf 18 to 24 feet along north facing shores, lowering to 15 to 20 feet tonight. Surf 12 to 18 feet along west facing shores, lowering to 8 to 12 feet tonight. * WHERE...North and west facing shores of Kauai, Niihau, Oahu, and Molokai, and for north facing shores of Maui. * WHEN...Until 6 AM HST Wednesday. * IMPACTS...Moderate. Expect strong breaking waves, shore break, and strong longshore and rip currents making swimming difficult and dangerous. PRECAUTIONARY/PREPAREDNESS ACTIONS... Beachgoers, swimmers, and surfers should heed all advice given by ocean safety officials and exercise caution. Know your limits; when in doubt, do not go out. && $$ HIZ023-025-026-200830- /O.EXT.PHFO.SU.Y.0006.000000T0000Z-210120T1600Z/ Kona-Big Island North and East-Kohala- 929 AM HST Tue Jan 19 2021 ...HIGH SURF ADVISORY NOW IN EFFECT UNTIL 6 AM HST WEDNESDAY... * WHAT...Surf 10 to 15 feet along north facing shores, and 5 to 8 feet along west facing shores. Surf will gradually diminish through tonight. * WHERE...North and west facing shores of the Big Island. * WHEN...Until 6 AM HST Wednesday. * IMPACTS...Moderate. Expect strong breaking waves, shore break, and strong longshore and rip currents making swimming difficult and dangerous. PRECAUTIONARY/PREPAREDNESS ACTIONS... Beachgoers, swimmers, and surfers should heed all advice given by ocean safety officials and exercise caution. Know your limits; when in doubt, do not go out. && $$ Birchard
The office that day
Everything else NWS Honolulu, HI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 15, 10:06 AM HST | Small Craft Advisory | HFO | 54 hr |
Nearby
High Surf Warnings in Hawaii, 2021Every high surf warning in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.