Alert archive / Hawaii / High Surf Warnings in 2019
High Surf Warning 7, NWS Honolulu, HI
NWS Honolulu, HI issued this high surf warning at Feb 15, 2019, 3:59 PM HST for Honolulu County, Kalawao County, Hawaii. It was in force for 61 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Feb 15, 2019, 3:59 PM HST (01:59 UTC)
- Expired
- Feb 18, 2019, 4:31 AM HST
- In force
- 61 hr
- Issued by
- NWS Honolulu, HI
Counties Honolulu County, HI, Kalawao County, HI
The radar
The Molokai radar (PHMO), 36 km from the middle of the area, began a volume at 01:58 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.
The nearest sounding before it
Lihue, (PHLI), launched 00:00Z, 2.0 hours before the alert went out and 209 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
- 21 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 1031 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- -32 m²/s²
- 0-3 km storm-relative helicity
- -9 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
044 WHHW40 PHFO 160159 CFWHFO Coastal Hazard Message National Weather Service Honolulu HI 359 PM HST Fri Feb 15 2019 ...HIGH SURF WARNING FOR EAST FACING SHORES OF KAUAI OAHU MOLOKAI MAUI AND BIG ISLAND... ...HIGH SURF ADVISORY FOR NORTH FACING SHORES OF NIIHAU KAUAI OAHU MOLOKAI MAUI AND BIG ISLAND... A reinforcing northeast swell will begin to build tonight and will produce high surf along exposed north and east facing shores through Saturday. Surf is expected to gradually decline late Saturday into Sunday. HIZ002-008-009-012-017-020-025-161500- /O.UPG.PHFO.SU.Y.0014.000000T0000Z-190216T0400Z/ /O.NEW.PHFO.SU.W.0007.190216T0159Z-190217T0400Z/ Kauai Windward-Oahu Koolau-Olomana-Molokai Windward- Maui Windward West-Windward Haleakala-Big Island North and East- 359 PM HST Fri Feb 15 2019 ...HIGH SURF WARNING IN EFFECT UNTIL 6 PM HST SATURDAY... The National Weather Service in Honolulu has issued a High Surf Warning, which is in effect until 6 PM HST Saturday. The High Surf Advisory is no longer in effect. * SURF...10 to 16 feet along exposed east facing shores of Kauai, Oahu, Molokai, Maui and Big Island. * TIMING...Through Saturday afternoon. * 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. Boaters should be aware of an increased number of surfers and body boarders utilizing the harbor channel to access surfing areas. && $$ HIZ001-007-013-019-161500- /O.NEW.PHFO.SU.Y.0015.190216T0159Z-190217T0400Z/ Niihau-Oahu North Shore-Molokai Leeward-Maui Central Valley- 359 PM HST Fri Feb 15 2019 ...HIGH SURF ADVISORY IN EFFECT UNTIL 6 PM HST SATURDAY... The National Weather Service in Honolulu has issued a High Surf Advisory, which is in effect until 6 PM HST Saturday. * SURF...10 to 16 feet along north facing shores of Niihau, Oahu, Molokai, Maui and the Big Island. * TIMING...through Saturday afternoon * IMPACTS...Moderate...Expect strong breaking waves, shore break, and strong longshore and rip currents making swimming difficult and dangerous. PRECAUTIONARY/PREPAREDNESS ACTIONS... Beachgoers, swimmers, and surfers should heed all advice given by ocean safety officials and exercise caution. Boaters should expect recreational surfers and body boarders utilizing harbor channels to access surfing areas. && $$ Kino
11 follow-up statements
450 WHHW40 PHFO 160640 CFWHFO Coastal Hazard Message National Weather Service Honolulu HI 840 PM HST Fri Feb 15 2019 ...HIGH SURF WARNING FOR EAST FACING SHORES OF KAUAI OAHU MOLOKAI MAUI AND BIG ISLAND... ...HIGH SURF ADVISORY FOR NORTH FACING SHORES OF NIIHAU KAUAI OAHU MOLOKAI MAUI AND BIG ISLAND... .A reinforcing northeast swell will begin to build tonight and will produce high surf along exposed north and east facing shores through Saturday. Surf is expected to gradually decline late Saturday into Sunday. HIZ002-008-009-012-017-020-025-161945- /O.CON.PHFO.SU.W.0007.000000T0000Z-190217T0400Z/ Kauai Windward-Oahu Koolau-Olomana-Molokai Windward- Maui Windward West-Windward Haleakala-Big Island North and East- 840 PM HST Fri Feb 15 2019 ...HIGH SURF WARNING REMAINS IN EFFECT UNTIL 6 PM HST SATURDAY... * SURF...10 to 16 feet along exposed north and east facing shores of Kauai, Oahu, Molokai, Maui and Big Island. * TIMING...Through Saturday afternoon. * 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. Boaters should be aware of an increased number of surfers and body boarders utilizing the harbor channel to access surfing areas. && $$ HIZ001-007-013-019-161945- /O.CON.PHFO.SU.Y.0015.000000T0000Z-190217T0400Z/ Niihau-Oahu North Shore-Molokai Leeward-Maui Central Valley- 840 PM HST Fri Feb 15 2019 ...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 6 PM HST SATURDAY... * SURF...10 to 16 feet along exposed north and east facing shores of Kauai, Oahu, Molokai, Maui and Big Island. * TIMING...through Saturday afternoon. * IMPACTS...Moderate...Expect strong breaking waves, shore break, and strong longshore and rip currents making swimming difficult and dangerous. PRECAUTIONARY/PREPAREDNESS ACTIONS... Beachgoers, swimmers, and surfers should heed all advice given by ocean safety officials and exercise caution. Boaters should expect recreational surfers and body boarders utilizing harbor channels to access surfing areas. && $$
544 WHHW40 PHFO 160843 CCA CFWHFO Coastal Hazard Message...CORRECTED National Weather Service Honolulu HI 1043 PM HST Fri Feb 15 2019 ...HIGH SURF WARNING FOR EAST FACING SHORES OF KAUAI OAHU MOLOKAI MAUI AND BIG ISLAND... ...HIGH SURF ADVISORY FOR NORTH FACING SHORES OF NIIHAU KAUAI OAHU MOLOKAI MAUI AND BIG ISLAND... .A reinforcing northeast swell will begin to build tonight and will produce high surf along exposed north and east facing shores through Saturday. Surf is expected to gradually decline late Saturday into Sunday. HIZ002-008-009-012-017-020-025-161945- /O.COR.PHFO.SU.W.0007.000000T0000Z-190217T0400Z/ Kauai Windward-Oahu Koolau-Olomana-Molokai Windward- Maui Windward West-Windward Haleakala-Big Island North and East- 1043 PM HST Fri Feb 15 2019 ...HIGH SURF WARNING FOR EAST FACING SHORES REMAINS IN EFFECT UNTIL 6 PM HST SATURDAY... ...HIGH SURF ADVISORY FOR NORTH FACING SHORES REMAINS IN EFFECT UNTIL 6 PM HST SATURDAY... * SURF...10 to 16 feet along exposed north and east facing shores of Niihau, Kauai, Oahu, Molokai, Maui and Big Island. * TIMING...Through Saturday afternoon. * 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. Boaters should be aware of an increased number of surfers and body boarders utilizing the harbor channel to access surfing areas. && $$ HIZ001-007-013-019-161945- /O.COR.PHFO.SU.Y.0015.000000T0000Z-190217T0400Z/ Niihau-Oahu North Shore-Molokai Leeward-Maui Central Valley- 1043 PM HST Fri Feb 15 2019 ...HIGH SURF ADVISORY FOR NORTH FACING SHORES REMAINS IN EFFECT UNTIL 6 PM HST SATURDAY... * SURF...10 to 16 feet along exposed north facing shores of Niihau, Kauai, Oahu, Molokai, Maui and Big Island. * TIMING...through Saturday afternoon. * IMPACTS...Moderate...Expect strong breaking waves, shore break, and strong longshore and rip currents making swimming difficult and dangerous. PRECAUTIONARY/PREPAREDNESS ACTIONS... Beachgoers, swimmers, and surfers should heed all advice given by ocean safety officials and exercise caution. Boaters should expect recreational surfers and body boarders utilizing harbor channels to access surfing areas. && $$
669 WHHW40 PHFO 161347 CFWHFO Coastal Hazard Message National Weather Service Honolulu HI 347 AM HST Sat Feb 16 2019 ...HIGH SURF WARNING FOR EAST FACING SHORES OF KAUAI OAHU MOLOKAI MAUI AND BIG ISLAND... ...HIGH SURF ADVISORY FOR NORTH FACING SHORES OF NIIHAU KAUAI OAHU MOLOKAI MAUI AND BIG ISLAND... .A reinforcing northeast swell will produce high surf along exposed north and east facing shores today. Surf is expected to gradually decline late Saturday into Sunday. The surf will likely remain at advisory levels along east facing shores tonight and Sunday. HIZ002-008-009-012-017-020-025-170300- /O.CON.PHFO.SU.W.0007.000000T0000Z-190217T0400Z/ Kauai Windward-Oahu Koolau-Olomana-Molokai Windward- Maui Windward West-Windward Haleakala-Big Island North and East- 347 AM HST Sat Feb 16 2019 ...HIGH SURF WARNING FOR EAST FACING SHORES REMAINS IN EFFECT UNTIL 6 PM HST THIS EVENING... ...HIGH SURF ADVISORY FOR NORTH FACING SHORES REMAINS IN EFFECT UNTIL 6 PM HST THIS EVENING... * SURF...10 to 16 feet along exposed north and east facing shores of Niihau, Kauai, Oahu, Molokai, Maui and Big Island. * TIMING...Through this afternoon. * 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. Boaters should be aware of an increased number of surfers and body boarders utilizing the harbor channel to access surfing areas. && $$ HIZ001-007-013-019-170300- /O.CON.PHFO.SU.Y.0015.000000T0000Z-190217T0400Z/ Niihau-Oahu North Shore-Molokai Leeward-Maui Central Valley- 347 AM HST Sat Feb 16 2019 ...HIGH SURF ADVISORY FOR NORTH FACING SHORES REMAINS IN EFFECT UNTIL 6 PM HST THIS EVENING... * SURF...10 to 16 feet along exposed north facing shores of Niihau, Kauai, Oahu, Molokai, Maui and Big Island. * TIMING...through this afternoon. * IMPACTS...Moderate...Expect strong breaking waves, shore break, and strong longshore and rip currents making swimming difficult and dangerous. PRECAUTIONARY/PREPAREDNESS ACTIONS... Beachgoers, swimmers, and surfers should heed all advice given by ocean safety officials and exercise caution. Boaters should expect recreational surfers and body boarders utilizing harbor channels to access surfing areas. && $$
283 WHHW40 PHFO 170159 CFWHFO Coastal Hazard Message National Weather Service Honolulu HI 359 PM HST Sat Feb 16 2019 ...HIGH SURF WARNING FOR EAST FACING SHORES OF KAUAI OAHU MOLOKAI MAUI AND BIG ISLAND... ...HIGH SURF ADVISORY FOR NORTH FACING SHORES OF NIIHAU KAUAI OAHU MOLOKAI MAUI AND BIG ISLAND... .The current large northeast swell will peak this afternoon and evening and gradually subside tonight into Sunday. Surf is expected to lower to advisory levels along east facing shores on Sunday. HIZ002-008-009-012-017-020-025-171500- /O.EXT.PHFO.SU.W.0007.000000T0000Z-190217T1600Z/ Kauai Windward-Oahu Koolau-Olomana-Molokai Windward- Maui Windward West-Windward Haleakala-Big Island North and East- 359 PM HST Sat Feb 16 2019 ...HIGH SURF WARNING NOW IN EFFECT UNTIL 6 AM HST SUNDAY... ...HIGH SURF ADVISORY NOW IN EFFECT UNTIL 6 AM HST SUNDAY... * SURF...10 to 16 feet with locally higher sets along exposed north and east facing shores of Niihau, Kauai, Oahu, Molokai, Maui and Big Island. * TIMING...Through early Sunday morning. * 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. Boaters should be aware of an increased number of surfers and body boarders utilizing the harbor channel to access surfing areas. && $$ HIZ001-007-013-019-171500- /O.EXT.PHFO.SU.Y.0015.000000T0000Z-190217T1600Z/ Niihau-Oahu North Shore-Molokai Leeward-Maui Central Valley- 359 PM HST Sat Feb 16 2019 ...HIGH SURF ADVISORY NOW IN EFFECT UNTIL 6 AM HST SUNDAY... * SURF...10 to 16 feet along exposed north facing shores of Niihau, Kauai, Oahu, Molokai, Maui and Big Island. * TIMING...through early Sunday morning. * IMPACTS...Moderate...Expect strong breaking waves, shore break, and strong longshore and rip currents making swimming difficult and dangerous. PRECAUTIONARY/PREPAREDNESS ACTIONS... Beachgoers, swimmers, and surfers should heed all advice given by ocean safety officials and exercise caution. Boaters should expect recreational surfers and body boarders utilizing harbor channels to access surfing areas. && $$ Kino
991 WHHW40 PHFO 170423 CCA CFWHFO Coastal Hazard Message...CORRECTED National Weather Service Honolulu HI 623 PM HST Sat Feb 16 2019 ...HIGH SURF WARNING FOR EAST FACING SHORES OF KAUAI OAHU MOLOKAI MAUI AND BIG ISLAND... ...HIGH SURF ADVISORY FOR NORTH FACING SHORES OF NIIHAU KAUAI OAHU MOLOKAI MAUI AND BIG ISLAND... .The current large northeast swell will remain high through Sunday then gradually subside. HIZ002-008-009-012-017-020-025-171500- /O.COR.PHFO.SU.W.0007.000000T0000Z-190217T1600Z/ Kauai Windward-Oahu Koolau-Olomana-Molokai Windward- Maui Windward West-Windward Haleakala-Big Island North and East- 623 PM HST Sat Feb 16 2019 ...HIGH SURF WARNING UNTIL 6 AM SUNDAY FOR EAST FACING SHORES... ...HIGH SURF ADVISORY UNTIL 6 AM SUNDAY FOR NORTH FACING SHORES... * SURF...15 to 20 feet with locally higher sets along exposed north and east facing shores of Niihau, Kauai, Oahu, Molokai, Maui and Big Island. * TIMING...Through early Sunday morning. * IMPACTS...High...Expect ocean water occasionally sweeping across shorelines, very strong breaking waves, and strong currents. PRECAUTIONARY/PREPAREDNESS ACTIONS... Stay well away from the shoreline along the affected showers. && $$ HIZ001-007-013-019-171500- /O.COR.PHFO.SU.Y.0015.000000T0000Z-190217T1600Z/ Niihau-Oahu North Shore-Molokai Leeward-Maui Central Valley- 623 PM HST Sat Feb 16 2019 ...HIGH SURF ADVISORY UNTIL 6 AM SUNDAY FOR NORTH FACING SHORES... * SURF...15 to 20 feet along exposed north facing shores of Niihau, Kauai, Oahu, Molokai, Maui and Big Island. * TIMING...through early Sunday morning. * IMPACTS...Moderate...Expect strong breaking waves, strong currents making swimming dangerous. PRECAUTIONARY/PREPAREDNESS ACTIONS... Heed all advice from ocean safety officials and exercise caution. When in doubt, do not go out. && $$ Donaldson
497 WHHW40 PHFO 171332 CFWHFO Coastal Hazard Message National Weather Service Honolulu HI 332 AM HST Sun Feb 17 2019 ...HIGH SURF WARNING FOR EAST FACING SHORES OF KAUAI OAHU MOLOKAI MAUI AND BIG ISLAND... ...HIGH SURF ADVISORY FOR NORTH FACING SHORES OF NIIHAU KAUAI OAHU MOLOKAI MAUI AND BIG ISLAND... .The current large northeast swell will remain high through today then gradually subside. HIZ002-008-009-012-017-020-025-180245- /O.EXT.PHFO.SU.W.0007.000000T0000Z-190218T0400Z/ Kauai Windward-Oahu Koolau-Olomana-Molokai Windward- Maui Windward West-Windward Haleakala-Big Island North and East- 332 AM HST Sun Feb 17 2019 ...HIGH SURF WARNING NOW IN EFFECT UNTIL 6 PM THIS EVENING... * SURF...12 to 18 feet with locally higher sets along north and east facing shores of Niihau, Kauai, Oahu, Molokai, Maui and the Big Island. * TIMING...Through this evening. * IMPACTS...High...Expect ocean water occasionally sweeping across shorelines, very strong breaking waves, and strong currents. PRECAUTIONARY/PREPAREDNESS ACTIONS... Stay well away from the shoreline along the affected showers. && $$ HIZ001-007-013-019-180245- /O.EXT.PHFO.SU.Y.0015.000000T0000Z-190218T0400Z/ Niihau-Oahu North Shore-Molokai Leeward-Maui Central Valley- 332 AM HST Sun Feb 17 2019 ...HIGH SURF ADVISORY NOW IN EFFECT UNTIL 6 PM HST THIS EVENING... * SURF...12 to 18 feet along north facing shores of Niihau, Kauai, Oahu, Molokai, Maui and the Big Island. * TIMING...through this evening. * IMPACTS...Moderate...Expect strong breaking waves, strong currents making swimming dangerous. PRECAUTIONARY/PREPAREDNESS ACTIONS... Heed all advice from ocean safety officials and exercise caution. When in doubt, do not go out. && $$ Donaldson
544 WHHW40 PHFO 171338 CCA CFWHFO Coastal Hazard Message...CORRECTED National Weather Service Honolulu HI 338 AM HST Sun Feb 17 2019 ...HIGH SURF WARNING FOR EAST FACING SHORES OF KAUAI OAHU MOLOKAI MAUI AND BIG ISLAND... ...HIGH SURF ADVISORY FOR NORTH FACING SHORES OF NIIHAU KAUAI OAHU MOLOKAI MAUI AND BIG ISLAND... .The current large northeast swell will remain high through today then gradually subside. HIZ002-008-009-012-017-020-025-180245- /O.COR.PHFO.SU.W.0007.000000T0000Z-190218T0400Z/ Kauai Windward-Oahu Koolau-Olomana-Molokai Windward- Maui Windward West-Windward Haleakala-Big Island North and East- 338 AM HST Sun Feb 17 2019 ...HIGH SURF WARNING UNTIL 6 PM THIS EVENING FOR EAST FACING SHORES... ...HIGH SURF ADVISORY UNTIL 6 PM THIS EVENING FOR NORTH FACING SHORES... * SURF...12 to 18 feet with locally higher sets along north and east facing shores of Niihau, Kauai, Oahu, Molokai, Maui and the Big Island. * TIMING...Through this evening. * IMPACTS...High...Expect ocean water occasionally sweeping across shorelines, very strong breaking waves, and strong currents. PRECAUTIONARY/PREPAREDNESS ACTIONS... Stay well away from the shoreline along the affected showers. && $$ HIZ001-007-013-019-180245- /O.COR.PHFO.SU.Y.0015.000000T0000Z-190218T0400Z/ Niihau-Oahu North Shore-Molokai Leeward-Maui Central Valley- 338 AM HST Sun Feb 17 2019 ...HIGH SURF ADVISORY UNTIL 6 PM HST THIS EVENING FOR NORTH FACING SHORES... * SURF...12 to 18 feet along north facing shores of Niihau, Kauai, Oahu, Molokai, Maui and the Big Island. * TIMING...through this evening. * IMPACTS...Moderate...Expect strong breaking waves, strong currents making swimming dangerous. PRECAUTIONARY/PREPAREDNESS ACTIONS... Heed all advice from ocean safety officials and exercise caution. When in doubt, do not go out. && $$ Donaldson
680 WHHW40 PHFO 171348 CCB CFWHFO Coastal Hazard Message...CORRECTED National Weather Service Honolulu HI 348 AM HST Sun Feb 17 2019 ...HIGH SURF WARNING FOR EAST FACING SHORES OF KAUAI OAHU MOLOKAI MAUI AND BIG ISLAND... ...HIGH SURF ADVISORY FOR NORTH FACING SHORES OF NIIHAU KAUAI OAHU MOLOKAI MAUI AND BIG ISLAND... .The current large northeast swell will remain high through today then gradually subside. HIZ002-008-009-012-017-020-025-180245- /O.COR.PHFO.SU.W.0007.000000T0000Z-190218T0400Z/ Kauai Windward-Oahu Koolau-Olomana-Molokai Windward- Maui Windward West-Windward Haleakala-Big Island North and East- 348 AM HST Sun Feb 17 2019 ...HIGH SURF WARNING UNTIL 6 PM THIS EVENING FOR EAST FACING SHORES... ...HIGH SURF ADVISORY UNTIL 6 PM THIS EVENING FOR NORTH FACING SHORES... * SURF...12 to 18 feet with locally higher sets along north and east facing shores of Niihau, Kauai, Oahu, Molokai, Maui and the Big Island. * TIMING...Through this evening. * IMPACTS...High...Expect ocean water occasionally sweeping across shorelines, very strong breaking waves, and strong currents. PRECAUTIONARY/PREPAREDNESS ACTIONS... Stay well away from the shoreline along the affected shores. && $$ HIZ001-007-013-019-180245- /O.COR.PHFO.SU.Y.0015.000000T0000Z-190218T0400Z/ Niihau-Oahu North Shore-Molokai Leeward-Maui Central Valley- 348 AM HST Sun Feb 17 2019 ...HIGH SURF ADVISORY UNTIL 6 PM HST THIS EVENING FOR NORTH FACING SHORES... * SURF...12 to 18 feet along north facing shores of Niihau, Kauai, Oahu, Molokai, Maui and the Big Island. * TIMING...through this evening. * IMPACTS...Moderate...Expect strong breaking waves, strong currents making swimming dangerous. PRECAUTIONARY/PREPAREDNESS ACTIONS... Heed all advice from ocean safety officials and exercise caution. When in doubt, do not go out. && $$ Donaldson
355 WHHW40 PHFO 172103 CFWHFO Coastal Hazard Message National Weather Service Honolulu HI 1103 AM HST Sun Feb 17 2019 ...HIGH SURF WARNING FOR EAST FACING SHORES OF KAUAI OAHU MOLOKAI MAUI AND BIG ISLAND... ...HIGH SURF ADVISORY FOR NORTH FACING SHORES OF NIIHAU KAUAI OAHU MOLOKAI MAUI AND BIG ISLAND... .The combination of a mid-period northeast swell and short-period east swell will produce large surf through tonight across exposed east and north facing shores. Surf is expected to lower on Monday. HIZ024-181015- /O.EXB.PHFO.SU.W.0007.000000T0000Z-190218T1600Z/ South Big Island- 1103 AM HST Sun Feb 17 2019 ...HIGH SURF WARNING IN EFFECT UNTIL 6 AM HST MONDAY FOR EAST FACING SHORES... The National Weather Service in Honolulu has issued a High Surf Warning, which is in effect until 6 AM HST Monday. * SURF...12 to 18 feet with locally higher sets today, lowering to 10 to 15 feet tonight along east facing shores of the Big Island. * TIMING...Through early Monday morning. * IMPACTS...High...Expect ocean water occasionally sweeping across shorelines, very strong breaking waves, and strong currents. PRECAUTIONARY/PREPAREDNESS ACTIONS... Stay well away from the shoreline along the affected shores. && $$ HIZ002-008-009-012-017-020-025-181015- /O.EXT.PHFO.SU.W.0007.000000T0000Z-190218T1600Z/ Kauai Windward-Oahu Koolau-Olomana-Molokai Windward- Maui Windward West-Windward Haleakala-Big Island North and East- 1103 AM HST Sun Feb 17 2019 ...HIGH SURF WARNING UNTIL 6 AM MONDAY FOR EAST FACING SHORES... ...HIGH SURF ADVISORY UNTIL 6 AM MONDAY FOR NORTH FACING SHORES... * SURF...12 to 18 feet with locally higher sets today, lowering to 10 to 15 feet tonight along north and east facing shores of Niihau, Kauai, Oahu, Molokai, Maui and the Big Island. * TIMING...Through early Monday morning. * IMPACTS...High...Expect ocean water occasionally sweeping across shorelines, very strong breaking waves, and strong currents. PRECAUTIONARY/PREPAREDNESS ACTIONS... Stay well away from the shoreline along the affected shores. && $$ HIZ001-007-013-019-181015- /O.EXT.PHFO.SU.Y.0015.000000T0000Z-190218T1600Z/ Niihau-Oahu North Shore-Molokai Leeward-Maui Central Valley- 1103 AM HST Sun Feb 17 2019 ...HIGH SURF ADVISORY NOW IN EFFECT UNTIL 6 AM HST MONDAY FOR NORTH FACING SHORES... * SURF...12 to 18 feet today, lowering to 10 to 15 feet tonight along north facing shores of Niihau, Kauai, Oahu, Molokai, Maui and the Big Island. * TIMING...through early Monday morning. * IMPACTS...Moderate...Expect strong breaking waves, strong currents making swimming dangerous. PRECAUTIONARY/PREPAREDNESS ACTIONS... Heed all advice from ocean safety officials and exercise caution. When in doubt, do not go out. && $$ Kino
529 WHHW40 PHFO 180150 CFWHFO Coastal Hazard Message National Weather Service Honolulu HI 350 PM HST Sun Feb 17 2019 ...HIGH SURF WARNING FOR EAST FACING SHORES OF KAUAI OAHU MOLOKAI MAUI AND BIG ISLAND... ...HIGH SURF ADVISORY FOR NORTH FACING SHORES OF NIIHAU KAUAI OAHU MOLOKAI MAUI AND BIG ISLAND... .The combination of a mid-period northeast swell and short-period east swell will produce large surf through tonight across exposed east and north facing shores. Surf is expected to gradually lower on Monday. HIZ002-008-009-012-017-020-024-025-181500- /O.CON.PHFO.SU.W.0007.000000T0000Z-190218T1600Z/ Kauai Windward-Oahu Koolau-Olomana-Molokai Windward- Maui Windward West-Windward Haleakala-South Big Island- Big Island North and East- 350 PM HST Sun Feb 17 2019 ...HIGH SURF WARNING REMAINS IN EFFECT UNTIL 6 AM HST MONDAY FOR EAST FACING SHORES... ...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 6 AM HST MONDAY FOR NORTH FACING SHORES... * SURF...12 to 18 feet with locally higher sets this evening, lowering to 10 to 16 feet tonight along north and east facing shores of Niihau, Kauai, Oahu, Molokai, Maui and the Big Island. * TIMING...Through early Monday morning. * IMPACTS...High...Expect ocean water occasionally sweeping across shorelines, very strong breaking waves, and strong currents. PRECAUTIONARY/PREPAREDNESS ACTIONS... Stay well away from the shoreline along the affected shores. && $$ HIZ001-007-013-019-181500- /O.CON.PHFO.SU.Y.0015.000000T0000Z-190218T1600Z/ Niihau-Oahu North Shore-Molokai Leeward-Maui Central Valley- 350 PM HST Sun Feb 17 2019 ...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 6 AM HST MONDAY... * SURF...12 to 18 feet this evening, lowering to 10 to 16 feet tonight along north facing shores of Niihau, Kauai, Oahu, Molokai, Maui and the Big Island. * TIMING...through early Monday morning. * IMPACTS...Moderate...Expect strong breaking waves, strong currents making swimming dangerous. PRECAUTIONARY/PREPAREDNESS ACTIONS... Heed all advice from ocean safety officials and exercise caution. When in doubt, do not go out. && $$ Kino
952 WHHW40 PHFO 181431 CFWHFO Coastal Hazard Message National Weather Service Honolulu HI 431 AM HST Mon Feb 18 2019 ...HIGH SURF ADVISORY FOR NORTH FACING SHORES OF NIIHAU AND KAUAI... ...HIGH SURF ADVISORY FOR EAST FACING SHORES OF OAHU MOLOKAI MAUI AND BIG ISLAND... ...HIGH SURF WARNING FOR EAST FACING SHORES OF KAUAI OAHU MOLOKAI MAUI AND BIG ISLAND IS CANCELLED... ...HIGH SURF ADVISORY FOR NORTH FACING SHORES OF OAHU MOLOKAI MAUI AND THE BIG ISLAND IS CANCELLED... .The combination of a mid-period north-northeast swell and short- period east swell will produce advisory level surf today across most exposed east facing shores and some north facing shores. Surf is expected to trend lower tonight. HIZ002-008-009-012-017-020-024-025-190400- /O.CAN.PHFO.SU.W.0007.000000T0000Z-190218T1600Z/ /O.EXB.PHFO.SU.Y.0015.000000T0000Z-190219T0400Z/ Kauai Windward-Oahu Koolau-Olomana-Molokai Windward- Maui Windward West-Windward Haleakala-South Big Island- Big Island North and East- 431 AM HST Mon Feb 18 2019 ...HIGH SURF ADVISORY IN EFFECT UNTIL 6 PM HST THIS EVENING... ...HIGH SURF WARNING IS CANCELLED... The National Weather Service in Honolulu has issued a High Surf Advisory, which is in effect until 6 PM HST this evening. The High Surf Warning has been cancelled for east facing shores of Kauai, Oahu, Molokai, Maui, and the Big Island. The High Surf Advisory has been cancelled for north facing shores of Oahu, Molokai, Maui and the Big Island. * SURF...6 to 10 feet along east facing shores of Oahu, Molokai, Maui and the Big Island. 10 to 15 feet along north facing shores of Kauai and 8 to 12 feet along east facing shores of Kauai. * TIMING...Through 6 PM HST this evening. * IMPACTS...Moderate...Expect strong breaking waves, strong currents making swimming dangerous. PRECAUTIONARY/PREPAREDNESS ACTIONS...Heed all advice from ocean safety officials and exercise caution. When in doubt, do not go out. && $$ HIZ007-013-019-181545- /O.CAN.PHFO.SU.Y.0015.000000T0000Z-190218T1600Z/ Oahu North Shore-Molokai Leeward-Maui Central Valley- 431 AM HST Mon Feb 18 2019 ...HIGH SURF ADVISORY IS CANCELLED... Surf has dropped below advisory levels for north facing shores of Oahu, Molokai and Maui. Therefore, the National Weather Service in Honolulu has cancelled the High Surf Advisory. $$ HIZ001-190400- /O.EXT.PHFO.SU.Y.0015.000000T0000Z-190219T0400Z/ Niihau- 431 AM HST Mon Feb 18 2019 ...HIGH SURF ADVISORY NOW IN EFFECT UNTIL 6 PM HST THIS EVENING... * SURF...10 to 15 feet along north facing shores of Niihau. * TIMING...Through 6 PM HST this evening. * IMPACTS...Moderate...Expect strong breaking waves, strong currents making swimming dangerous. PRECAUTIONARY/PREPAREDNESS ACTIONS...Heed all advice from ocean safety officials and exercise caution. When in doubt, do not go out. && $$
What forecasters said that day
The local office's own words before this high surf warning went out, 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 this high surf warning went out at Feb 15, 11:37 AM HST, 4 hours 22 minutes earlier.
Area forecast discussion, Feb 15, 11:37 AM HST, 4 hours 22 minutes before
Area Forecast Discussion National Weather Service Honolulu HI 1137 AM HST Fri Feb 15 2019 .SYNOPSIS... A weak low east of the islands will lift northward through Saturday, then shift westward to the north of the state through the remainder of the weekend. This will gradually reduce the shower coverage and diminish the winds from east to west across the state today through the weekend. Unsettled weather appears to make a return during the early to middle part of next week, as deep tropical moisture lifts northward over the island chain. This could bring heavy rainfall, thunderstorms and the potential for flash flooding particularly to the central and eastern islands. Improving conditions appear in line by late next week. && .DISCUSSION... Quick update to issue a Wind Advisory for the island of Lanai through midnight tonight. Previous discussion follows: Currently at the surface, a broad area of low pressure is located around 215 miles east of Hilo this morning, while a strong 1036 mb high is centered around 1350 miles north-northeast of Honolulu. The resulting gradient is producing breezy to locally windy north-northeasterly winds across the island chain this morning. Visible satellite imagery shows mostly cloudy skies in most windward areas, with partly cloudy conditions in leeward locales. Radar imagery shows scattered to numerous showers moving into windward areas, with some showers spilling over into leeward communities. Main short term concerns revolve around rainfall and wind trends through the weekend as the broad area of low pressure tracks westward to the north of the state. Rest of today through Sunday night, The latest model guidance is in fairly good agreement showing the broad area of low pressure lifting northward through Saturday, then tracking westward well to the north of the islands Saturday night through Sunday night. Breezy to locally windy north- northeasterly winds will continue across the state today, with winds then gradually diminishing from east to west across the island chain tonight through Saturday night as the gradient relaxes. By Sunday and Sunday night, rather light winds are expected statewide, with daytime sea breezes and overnight land breezes expected in most areas. Showery conditions will continue statewide today, with the most unsettled weather expected across windward areas, although a fair amount of leeward spillover will continue given the strong north- northeasterly winds. The cold temperatures aloft associated with the upper level low will maintain the potential for an isolated thunderstorm or two, mainly over the eastern half of the state. Also, some additional snow will remain possible over the summits of Haleakala, Mauna Kea, and Mauna Loa, and as a result a Winter Weather Advisory remains in effect through 6 PM this evening. As the onshore flow diminishes from east to west across the state tonight through Saturday night, shower coverage and intensity will also trend downward in similar fashion from east to west across the island chain. Showers will continue to favor windward and mauka areas, with a few showers reaching leeward communities from time to time. By Sunday and Sunday night, winds will be light enough to allow for daytime convective shower development over mainly interior and mauka areas, with shower chances best along windward coastal areas at night. Monday through next Friday, Model solutions are in fairly good agreement through the long term periods as well, with both the GFS and ECMWF indicating that more unsettled weather is in store for the island chain next week. Both models show the broad low or trough shifting westward and further away from the state early next week, while a strong 1045 mb high builds well to the north-northeast of the island chain. Meanwhile, an upper level trough west of the state will begin to induce low level troughing over the eastern end of the island chain early next week, with the models then indicating the potential for a low to develop along the trough and lift northward over the eastern or central islands around mid week. Both models show a tap into deep tropical moisture originating from the intertropical convergence zone, with precipitable water values climbing well above normal into the 1.5 to 2.2 inch range Monday night through at least Wednesday. This will bring the potential for widespread heavy rainfall and possibly thunderstorms to portions of the state, with the central and eastern islands appearing to be the favored targets at this time. By late next week as the low pulls further north and away from the state, drier air will work back into the region, reducing the shower coverage and intensity across the island chain. && .AVIATION... A surface low, to the east of the Big Islands, will start to move northwest later today/tonight. Currently, the low is helping to tighten the pressure gradient over the islands, producing fresh to strong north to northeast winds over most of the state. AIRMET TANGO for low level turbulence remains posted over the entire island chain. Winds will start to ease, from east to west, as the low moves into a position just north of the islands. High-res guidance shows light to moderate west to north winds from Maui County eastward by Saturday morning and moderate to fresh north winds from Oahu and west. It is likely AIRMET TANGO for low level turbulence will be scaled back to the western islands Saturday. An upper level low over the state will help enhance clouds and showers, especially for mountain and windward areas. Isolated thunderstorms are possible today, mainly along the windward mountain and coasts, and northeast waters from Molokai through Big Island. Isolated light rime icing from flight levels 100 to FL250 is also possible in an areas of layered clouds just northeast of the Big Island and Maui. AIRMET SIERRA for mountain obscuration is posted across windward areas on all islands. Tempo MVFR to isol IFR CIG/VIS should be expected. This will likely continue for most of the weekend. Leeward areas should continue to see mainly VFR with passing showers with MVFR CIG/VIS today. && .AVIATION... A surface low, to the east of the Big Islands, will start to move northwest later today/tonight. Currently, the low is helping to tighten the pressure gradient over the islands, producing fresh to strong north to northeast winds over most of the state. AIRMET TANGO for low level turbulence remains posted over the entire island chain. Winds will start to ease, from east to west, as the low moves into a position just north of the islands. High-res guidance shows light to moderate west to north winds from Maui County eastward by Saturday morning and moderate to fresh north winds from Oahu and west. It is likely AIRMET TANGO for low level turbulence will be scaled back to the western islands Saturday. An upper level low over the state will help enhance clouds and showers, especially for mountain and windward areas. Isolated thunderstorms are possible today, mainly along the windward mountain and coasts, and northeast waters from Molokai through Big Island. Isolated light rime icing from flight levels 100 to FL250 is also possible in an areas of layered clouds just northeast of the Big Island and Maui. AIRMET SIERRA for mountain obscuration is posted across windward areas on all islands. Tempo MVFR to isol IFR CIG/VIS should be expected. This will likely continue for most of the weekend. Leeward areas should continue to see mainly VFR with passing showers with MVFR CIG/VIS today. && .MARINE... Strong high pressure far north of the state is currently being disrupted by a low located northeast of the Big Island. Winds will continue to be strong and gusty and out of the northeast for areas west of the Big Island through this afternoon and evening. Near the Big Island, winds will be a little more unpredictable due to the frequent showers and the low passing close to the area. But overall, winds will be mainly out of the north or northwest near the Big Island through this evening. The possibility for heavier showers and thunderstorms will remain near the Big Island and Maui County waters through this afternoon. As the low tracks north and west over the next few days, winds will begin to decrease in speed, and the direction will begin to shift to the north and then west over the weekend. Beyond the weekend, there is still quite a bit of uncertainty in the weather pattern due to an upper level low lingering near the state. But overall, winds will likely remain below Small Craft Advisory levels early next week. The current northeast swell has decreased slightly compared to yesterday, but is still holding at heights well above normal. High Surf Advisories are posted for east facing shores through this afternoon, but will be extended at least through Saturday. A small to moderate northwest swell will begin to build on Saturday and is expected to peak at heights below advisory levels on Sunday. A Small Craft Advisory (SCA) for all Hawaiian waters is posted through this afternoon, and will likely need to be extended for select zones as we get into the weekend. && .HFO WATCHES/WARNINGS/ADVISORIES... High Surf Advisory until 6 PM HST this evening for Kauai Windward-Oahu Koolau-Olomana-Molokai Windward-Maui Windward West- Windward Haleakala-Big Island North and East. Winter Weather Advisory until 6 PM HST this evening for Haleakala Summit-Big Island Summits. Wind Advisory until midnight HST tonight for Lanai. Small Craft Advisory until 6 PM HST this evening for all Hawaiian waters- && DISCUSSION...Jelsema AVIATION...Eaton MARINE...Kino
The office that day
Everything else NWS Honolulu, HI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 15, 3:59 PM HST | High Surf Advisory | HFO | Honolulu, Kauai, Kalawao | 6 days |
Nearby
High Surf Warnings in Hawaii, 2019Every high surf warning in 2019
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.