Alert archive / Hawaii / Flash Flood Watches in 2021
Flash Flood Watch 6, NWS Honolulu, HI
NWS Honolulu, HI issued this flash flood watch at Mar 7, 2021, 11:20 AM HST for 4 counties in Hawaii. It took effect at Mar 7, 2021, 6:00 PM HST. It was in force for 8 days.
The area
The counties it named.
The facts
- Issued
- Mar 7, 2021, 11:20 AM HST (21:20 UTC)
- In effect from
- Mar 7, 2021, 6:00 PM HST
- Expired
- Mar 15, 2021, 5:29 PM HST
- In force
- 8 days
- Issued by
- NWS Honolulu, HI
- Flood severity
- None
Counties Hawaii County, HI, Honolulu County, HI, Kalawao County, HI, Kauai County, HI
The radar
The Molokai radar (PHMO), 38 km from the middle of the area, began a volume at 21:19 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 12:00Z, 9.3 hours before the alert went out and 214 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
- 209 J/kg
- Mixed-layer CIN
- -10 J/kg
- Mixed-layer LCL
- 957 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- -14 m²/s²
- 0-3 km storm-relative helicity
- 21 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
340 WGHW60 PHFO 072120 FFAHFO URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Honolulu HI 1120 AM HST Sun Mar 7 2021 ...FLASH FLOOD WATCH FOR THE BIG ISLAND STARTING 6 PM HST TONIGHT... HIZ023>028-080315- /O.NEW.PHFO.FF.A.0006.210308T0400Z-210310T1600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Kona-South Big Island-Big Island North and East-Kohala-Big Island Interior-Big Island Summits- 1120 AM HST Sun Mar 7 2021 ...FLASH FLOOD WATCH IN EFFECT FROM 6 PM HST THIS EVENING THROUGH LATE TUESDAY NIGHT... The National Weather Service in Honolulu has issued a * Flash Flood Watch for the Big Island. * From 6 PM HST this evening through late Tuesday night * Deep moisture will spread over the Big Island from the southeast tonight and Monday, then linger into at least Tuesday, bringing the potential for persistent heavy rain that could lead to flash flooding. * Flood prone roads and other low lying areas may be closed due to elevated runoff and overflowing streams. Landslides may also occur in areas with steep terrain. PRECAUTIONARY/PREPAREDNESS ACTIONS... Be prepared to take action if a Flash Flood Warning is issued. If you experience heavy rain or rising waters, head to higher ground immediately. A Flash Flood Watch means that conditions are favorable for flash flooding. Flash Flooding is LIFE THREATENING. Do not cross fast flowing water in your vehicle or on foot. && $$ Birchard
20 follow-up statements
741 WGHW60 PHFO 080107 FFAHFO URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Honolulu HI 307 PM HST Sun Mar 7 2021 ...FLASH FLOOD WATCH FOR THE BIG ISLAND... ...FLASH FLOOD WATCH FOR MAUI COUNTY STARTING 6 AM HST MONDAY... HIZ012>022-081515- /O.EXB.PHFO.FF.A.0006.210308T1600Z-210310T1600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Molokai Windward-Molokai Leeward-Lanai Makai-Lanai Mauka-Kahoolawe- Maui Windward West-Maui Leeward West-Maui Central Valley-Windward Haleakala-Leeward Haleakala-Haleakala Summit- 307 PM HST Sun Mar 7 2021 ...FLASH FLOOD WATCH IN EFFECT FROM MONDAY MORNING THROUGH LATE TUESDAY NIGHT... The National Weather Service in Honolulu has expanded the * Flash Flood Watch to include Maui, Molokai, Kahoolawe and Lanai. * From Monday morning through late Tuesday night * Deep moisture will spread over Maui County from the east and southeast on Monday, then linger into at least Tuesday, bringing the potential for persistent heavy rain that could lead to flash flooding. * Flood prone roads and other low lying areas may be closed due to elevated runoff and overflowing streams. Landslides may also occur in areas with steep terrain. PRECAUTIONARY/PREPAREDNESS ACTIONS... Be prepared to take action if a Flash Flood Warning is issued. If you experience heavy rain or rising waters, head to higher ground immediately. A Flash Flood Watch means that conditions are favorable for flash flooding. Flash Flooding is LIFE THREATENING. Do not cross fast flowing water in your vehicle or on foot. && $$ HIZ023>028-081515- /O.CON.PHFO.FF.A.0006.210308T0400Z-210310T1600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Kona-South Big Island-Big Island North and East-Kohala-Big Island Interior-Big Island Summits- 307 PM HST Sun Mar 7 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH LATE TUESDAY NIGHT... The Flash Flood Watch continues for * The Big Island. * Through late Tuesday night * Deep moisture will spread over the Big Island from the east and southeast tonight and Monday, then linger into at least Tuesday, bringing the potential for persistent heavy rain that could lead to flash flooding. * Flood prone roads and other low lying areas may be closed due to elevated runoff and overflowing streams. Landslides may also occur in areas with steep terrain. PRECAUTIONARY/PREPAREDNESS ACTIONS... Be prepared to take action if a Flash Flood Warning is issued. If you experience heavy rain or rising waters, head to higher ground immediately. A Flash Flood Watch means that conditions are favorable for flash flooding. Flash Flooding is LIFE THREATENING. Do not cross fast flowing water in your vehicle or on foot. && $$ Birchard
494 WGHW60 PHFO 081313 FFAHFO Flood Watch National Weather Service Honolulu HI 313 AM HST Mon Mar 8 2021 HIZ023>028-090315- /O.CON.PHFO.FF.A.0006.000000T0000Z-210310T1600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Kona-South Big Island-Big Island North and East-Kohala-Big Island Interior-Big Island Summits- 313 AM HST Mon Mar 8 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH LATE TUESDAY NIGHT... The Flash Flood Watch continues for * The Big Island. * Through late Tuesday night * Deep moisture will spread over the Big Island from the east and southeast tonight and Monday, then linger into at least Tuesday, bringing the potential for persistent heavy rain that could lead to flash flooding. * Flood prone roads and other low lying areas may be closed due to elevated runoff and overflowing streams. Landslides may also occur in areas with steep terrain. PRECAUTIONARY/PREPAREDNESS ACTIONS... Be prepared to take action if a Flash Flood Warning is issued. If you experience heavy rain or rising waters, head to higher ground immediately. A Flash Flood Watch means that conditions are favorable for flash flooding. Flash Flooding is LIFE THREATENING. Do not cross fast flowing water in your vehicle or on foot. && $$ HIZ012>022-090315- /O.CON.PHFO.FF.A.0006.210308T1600Z-210310T1600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Molokai Windward-Molokai Leeward-Lanai Makai-Lanai Mauka-Kahoolawe- Maui Windward West-Maui Leeward West-Maui Central Valley-Windward Haleakala-Leeward Haleakala-Haleakala Summit- 313 AM HST Mon Mar 8 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH LATE TUESDAY NIGHT... The Flash Flood Watch continues for * Maui, Molokai, Kahoolawe and Lanai. * Through late Tuesday night * Deep moisture will spread over Maui County from the east and southeast on Monday, then linger into at least Tuesday, bringing the potential for persistent heavy rain that could lead to flash flooding. * Flood prone roads and other low lying areas may be closed due to elevated runoff and overflowing streams. Landslides may also occur in areas with steep terrain. PRECAUTIONARY/PREPAREDNESS ACTIONS... Be prepared to take action if a Flash Flood Warning is issued. If you experience heavy rain or rising waters, head to higher ground immediately. A Flash Flood Watch means that conditions are favorable for flash flooding. Flash Flooding is LIFE THREATENING. Do not cross fast flowing water in your vehicle or on foot. && $$ LAU
947 WGHW60 PHFO 081905 FFAHFO URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Honolulu HI 905 AM HST Mon Mar 8 2021 ...FLASH FLOOD WATCH EXPANDED TO INCLUDE ALL HAWAIIAN ISLANDS... HIZ001>011-090415- /O.EXA.PHFO.FF.A.0006.000000T0000Z-210310T1600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Niihau-Kauai Windward-Kauai Leeward-Kauai Mountains-Oahu South Shore- Waianae Coast-Oahu North Shore-Oahu Koolau-Olomana-Central Oahu- Waianae Mountains- 905 AM HST Mon Mar 8 2021 ...FLASH FLOOD WATCH IN EFFECT THROUGH LATE TUESDAY NIGHT... The National Weather Service in Honolulu has expanded the * Flash Flood Watch to include Oahu, Niihau and Kauai. * Through late Tuesday night * Deep moisture will spread over the state today and linger into at least Tuesday, bringing the potential for persistent heavy rain that could lead to flash flooding. * Flood prone roads and other low lying areas may be closed due to elevated runoff and overflowing streams. Urban areas may receive more significant flooding and property damage due to rapid runoff. PRECAUTIONARY/PREPAREDNESS ACTIONS... Be prepared to take action if a Flash Flood Warning is issued. If you experience heavy rain or rising waters, head to higher ground immediately. A Flash Flood Watch means that conditions are favorable for flash flooding. Flash Flooding is LIFE THREATENING. Do not cross fast flowing water in your vehicle or on foot. && $$ HIZ023>028-090415- /O.CON.PHFO.FF.A.0006.000000T0000Z-210310T1600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Kona-South Big Island-Big Island North and East-Kohala-Big Island Interior-Big Island Summits- 905 AM HST Mon Mar 8 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH LATE TUESDAY NIGHT... The Flash Flood Watch continues for * The Big Island. * Through late Tuesday night * Deep moisture will spread over the state today and will linger into at least Tuesday, bringing the potential for persistent heavy rain that could lead to flash flooding. * Flood prone roads and other low lying areas may be closed due to elevated runoff and overflowing streams. Urban areas may receive more significant flooding and property damage due to rapid runoff. PRECAUTIONARY/PREPAREDNESS ACTIONS... Be prepared to take action if a Flash Flood Warning is issued. If you experience heavy rain or rising waters, head to higher ground immediately. A Flash Flood Watch means that conditions are favorable for flash flooding. Flash Flooding is LIFE THREATENING. Do not cross fast flowing water in your vehicle or on foot. && $$ HIZ012>022-090415- /O.CON.PHFO.FF.A.0006.000000T0000Z-210310T1600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Molokai Windward-Molokai Leeward-Lanai Makai-Lanai Mauka-Kahoolawe- Maui Windward West-Maui Leeward West-Maui Central Valley-Windward Haleakala-Leeward Haleakala-Haleakala Summit- 905 AM HST Mon Mar 8 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH LATE TUESDAY NIGHT... The Flash Flood Watch continues for * Maui, Molokai, Kahoolawe and Lanai. * Through late Tuesday night * Deep moisture will spread over the state today and linger into at least Tuesday, bringing the potential for persistent heavy rain that could lead to flash flooding. * Flood prone roads and other low lying areas may be closed due to elevated runoff and overflowing streams. Urban areas may receive more significant flooding and property damage due to rapid runoff. PRECAUTIONARY/PREPAREDNESS ACTIONS... Be prepared to take action if a Flash Flood Warning is issued. If you experience heavy rain or rising waters, head to higher ground immediately. A Flash Flood Watch means that conditions are favorable for flash flooding. Flash Flooding is LIFE THREATENING. Do not cross fast flowing water in your vehicle or on foot. && $$ FOSTER
891 WGHW60 PHFO 090116 FFAHFO Flood Watch National Weather Service Honolulu HI 316 PM HST Mon Mar 8 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT FPR ALL ISLANDS THROUGH LATE TUESDAY NIGHT... HIZ023>028-091615- /O.CON.PHFO.FF.A.0006.000000T0000Z-210310T1600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Kona-South Big Island-Big Island North and East-Kohala-Big Island Interior-Big Island Summits- 316 PM HST Mon Mar 8 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH LATE TUESDAY NIGHT... The Flash Flood Watch continues for * The Big Island. * Through late Tuesday night * Deep moisture will remain over the state through at least Tuesday, bringing the potential for persistent heavy rain that could lead to flash flooding. * Significant flooding may occur due to the overflow of streams and drainages. Roads in several areas may be closed, along with property damage in urban or low lying spots due to runoff. Landslides may also occur in areas with steep terrain. PRECAUTIONARY/PREPAREDNESS ACTIONS... Be prepared to take action if a Flash Flood Warning is issued. If you experience heavy rain or rising waters, head to higher ground immediately. A Flash Flood Watch means that conditions are favorable for flash flooding. Flash Flooding is LIFE THREATENING. Do not cross fast flowing water in your vehicle or on foot. && $$ HIZ001>022-091615- /O.CON.PHFO.FF.A.0006.000000T0000Z-210310T1600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Niihau-Kauai Windward-Kauai Leeward-Kauai Mountains-Oahu South Shore- Waianae Coast-Oahu North Shore-Oahu Koolau-Olomana-Central Oahu- Waianae Mountains-Molokai Windward-Molokai Leeward-Lanai Makai-Lanai Mauka-Kahoolawe-Maui Windward West-Maui Leeward West-Maui Central Valley-Windward Haleakala-Leeward Haleakala-Haleakala Summit- 316 PM HST Mon Mar 8 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH LATE TUESDAY NIGHT... The Flash Flood Watch continues for * Molokai, Kauai, Maui, Lanai, Niihau, Oahu and Kahoolawe. * Through late Tuesday night * Deep moisture will remain over the state through least Tuesday, bringing the potential for persistent heavy rain that could lead to flash flooding. * Significant flooding may occur due to the overflow of streams and drainages. Roads in several areas may be closed, along with property damage in urban or low lying spots due to runoff. Landslides may also occur in areas with steep terrain. PRECAUTIONARY/PREPAREDNESS ACTIONS... Be prepared to take action if a Flash Flood Warning is issued. If you experience heavy rain or rising waters, head to higher ground immediately. A Flash Flood Watch means that conditions are favorable for flash flooding. Flash Flooding is LIFE THREATENING. Do not cross fast flowing water in your vehicle or on foot. && $$ FOSTER
805 WGHW60 PHFO 090550 FFAHFO Flood Watch National Weather Service Honolulu HI 750 PM HST Mon Mar 8 2021 ...FLASH FLOOD WATCH FOR ALL ISLANDS THROUGH LATE TUESDAY NIGHT... ...FLASH FLOOD WATCH FOR POTENTIAL FAILURE OF KAUPAKALUA DAM NEAR HAIKU MAUI... HIZ023>028-091500- /O.CON.PHFO.FF.A.0006.000000T0000Z-210310T1600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Kona-South Big Island-Big Island North and East-Kohala-Big Island Interior-Big Island Summits- 750 PM HST Mon Mar 8 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH LATE TUESDAY NIGHT... The Flash Flood Watch continues for * The Big Island. * Through late Tuesday night * Deep moisture will remain over the state through at least Tuesday, bringing the potential for persistent heavy rain that could lead to flash flooding. * Significant flooding may occur due to the overflow of streams and drainages. Roads in several areas may be closed, along with property damage in urban or low lying spots due to runoff. Landslides may also occur in areas with steep terrain. PRECAUTIONARY/PREPAREDNESS ACTIONS... Be prepared to take action if a Flash Flood Warning is issued. If you experience heavy rain or rising waters, head to higher ground immediately. A Flash Flood Watch means that conditions are favorable for flash flooding. Flash Flooding is LIFE THREATENING. Do not cross fast flowing water in your vehicle or on foot. && $$ HIZ001>022-091500- /O.CON.PHFO.FF.A.0006.000000T0000Z-210310T1600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Niihau-Kauai Windward-Kauai Leeward-Kauai Mountains-Oahu South Shore- Waianae Coast-Oahu North Shore-Oahu Koolau-Olomana-Central Oahu- Waianae Mountains-Molokai Windward-Molokai Leeward-Lanai Makai-Lanai Mauka-Kahoolawe-Maui Windward West-Maui Leeward West-Maui Central Valley-Windward Haleakala-Leeward Haleakala-Haleakala Summit- 750 PM HST Mon Mar 8 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH LATE TUESDAY NIGHT... The Flash Flood Watch continues for * Molokai, Kauai, Maui, Lanai, Niihau, Oahu and Kahoolawe. * Through late Tuesday night * Deep moisture will remain over the state through least Tuesday, bringing the potential for persistent heavy rain that could lead to flash flooding. Additional heavy rainfall over windward Maui could cause the failure of the Kaupakalua Dam near Haiku. * Significant flooding may occur due to the overflow of streams and drainages. Roads in several areas may be closed, along with property damage in urban or low lying spots due to runoff. Landslides may also occur in areas with steep terrain. If the Kaupakalua Dam were to fail, a life-threatening flood wave could occur downstream of the dam. PRECAUTIONARY/PREPAREDNESS ACTIONS... Be prepared to take action if a Flash Flood Warning is issued. If you experience heavy rain or rising waters, head to higher ground immediately. A Flash Flood Watch means that conditions are favorable for flash flooding. Flash Flooding is LIFE THREATENING. Do not cross fast flowing water in your vehicle or on foot. Any additional heavy rainfall in the vicinity of the dam could lead to a short notice Flash Flood Warning for areas downstream of the Kaupakalua Dam, so residents are urged to closely follow the instructions provided by Maui Emergency Manangement officials. && $$ Birchard
167 WGHW60 PHFO 091317 FFAHFO Flood Watch National Weather Service Honolulu HI 317 AM HST Tue Mar 9 2021 ...FLASH FLOOD WATCH FOR ALL ISLANDS UNTIL 6 AM HST WEDNESDAY... ...FLASH FLOOD WATCH FOR POTENTIAL FAILURE OF KAUPAKALUA DAM NEAR HAIKU MAUI... HIZ023>028-100245- /O.CON.PHFO.FF.A.0006.000000T0000Z-210310T1600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Kona-South Big Island-Big Island North and East-Kohala-Big Island Interior-Big Island Summits- 317 AM HST Tue Mar 9 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH LATE TONIGHT... The Flash Flood Watch continues for * The Big Island. * Through late tonight * Deep moisture will remain over the state through tonight, bringing the potential for additional heavy rain that could lead to flash flooding. * Significant flooding may occur due to the overflow of streams and drainages. Roads in several areas may be closed, along with property damage in urban or low lying spots due to runoff. Landslides may also occur in areas with steep terrain. PRECAUTIONARY/PREPAREDNESS ACTIONS... Be prepared to take action if a Flash Flood Warning is issued. If you experience heavy rain or rising waters, head to higher ground immediately. A Flash Flood Watch means that conditions are favorable for flash flooding. Flash Flooding is LIFE THREATENING. Do not cross fast flowing water in your vehicle or on foot. && $$ HIZ001>022-100245- /O.CON.PHFO.FF.A.0006.000000T0000Z-210310T1600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Niihau-Kauai Windward-Kauai Leeward-Kauai Mountains-Oahu South Shore- Waianae Coast-Oahu North Shore-Oahu Koolau-Olomana-Central Oahu- Waianae Mountains-Molokai Windward-Molokai Leeward-Lanai Makai-Lanai Mauka-Kahoolawe-Maui Windward West-Maui Leeward West-Maui Central Valley-Windward Haleakala-Leeward Haleakala-Haleakala Summit- 317 AM HST Tue Mar 9 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH LATE TONIGHT... The Flash Flood Watch continues for * Molokai, Kauai, Maui, Lanai, Niihau, Oahu and Kahoolawe. * Through late tonight * Deep moisture will remain over the state through tonight, bringing the potential for additional heavy rain that could lead to flash flooding. Additional heavy rainfall over windward Maui could cause the failure of the Kaupakalua Dam near Haiku, where water levels remain above normal. * Significant flooding may occur due to the overflow of streams and drainages. Roads in several areas may be closed, along with property damage in urban or low lying spots due to runoff. Landslides may also occur in areas with steep terrain. If the Kaupakalua Dam were to fail, a life-threatening flood wave could occur downstream of the dam. PRECAUTIONARY/PREPAREDNESS ACTIONS... Be prepared to take action if a Flash Flood Warning is issued. If you experience heavy rain or rising waters, head to higher ground immediately. A Flash Flood Watch means that conditions are favorable for flash flooding. Flash Flooding is LIFE THREATENING. Do not cross fast flowing water in your vehicle or on foot. Any additional heavy rainfall in the vicinity of the dam could lead to a short notice Flash Flood Warning for areas downstream of the Kaupakalua Dam, so residents are urged to closely follow the instructions provided by Maui Emergency Manangement officials. && $$ Birchard/Kodama
439 WGHW60 PHFO 100010 FFAHFO URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Honolulu HI 210 PM HST Tue Mar 9 2021 ...FLASH FLOOD WATCH FOR ALL ISLANDS UNTIL 6 PM HST WEDNESDAY... ...FLASH FLOOD WATCH FOR POTENTIAL FAILURE OF KAUPAKALUA DAM NEAR HAIKU MAUI... HIZ023>028-101415- /O.EXT.PHFO.FF.A.0006.000000T0000Z-210311T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Kona-South Big Island-Big Island North and East-Kohala-Big Island Interior-Big Island Summits- 210 PM HST Tue Mar 9 2021 ...FLASH FLOOD WATCH NOW IN EFFECT FOR THE BIG ISLAND THROUGH WEDNESDAY AFTERNOON... The Flash Flood Watch is now in effect for * The Big Island. * Through Wednesday afternoon * Moist air moving under a trough aloft will produce widespread heavy rain. * Significant flooding may occur due to the overflow of streams and drainages. Roads in several areas may be closed, along with property damage in urban or low lying spots due to runoff. Landslides may also occur in areas with steep terrain. PRECAUTIONARY/PREPAREDNESS ACTIONS... Be prepared to take action if a Flash Flood Warning is issued. If you experience heavy rain or rising waters, head to higher ground immediately. A Flash Flood Watch means that conditions are favorable for flash flooding. Flash Flooding is LIFE THREATENING. Do not cross fast flowing water in your vehicle or on foot. && $$ HIZ001>022-101415- /O.EXT.PHFO.FF.A.0006.000000T0000Z-210311T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Niihau-Kauai Windward-Kauai Leeward-Kauai Mountains-Oahu South Shore- Waianae Coast-Oahu North Shore-Oahu Koolau-Olomana-Central Oahu- Waianae Mountains-Molokai Windward-Molokai Leeward-Lanai Makai-Lanai Mauka-Kahoolawe-Maui Windward West-Maui Leeward West-Maui Central Valley-Windward Haleakala-Leeward Haleakala-Haleakala Summit- 210 PM HST Tue Mar 9 2021 ...FLASH FLOOD WATCH NOW IN EFFECT FOR MAUI COUNTY OAHU AND KAUAI COUNTY THROUGH WEDNESDAY AFTEROON... ...FLASH FLOOD WATCH FOR POTENTIAL FAILURE OF KAUPAKALUA DAM NEAR HAIKU MAUI... The Flash Flood Watch is now in effect for * Molokai, Kauai, Maui, Lanai, Niihau, Oahu and Kahoolawe. * Through Wednesday afternoon * Moist air moving under a trough aloft will produce widespread heavy rain. Heavy rain above Kaupakalua Dam may bring the risk of water overtopping the dam. * Significant flooding may occur due to the overflow of streams and drainages. Roads in several areas may be closed, along with property damage in urban or low lying spots due to runoff. Landslides may also occur in areas with steep terrain. PRECAUTIONARY/PREPAREDNESS ACTIONS... Be prepared to take action if a Flash Flood Warning is issued. If you experience heavy rain or rising waters, head to higher ground immediately. A Flash Flood Watch means that conditions are favorable for flash flooding. Flash Flooding is LIFE THREATENING. Do not cross fast flowing water in your vehicle or on foot. && $$ DONALDSON
553 WGHW60 PHFO 101313 FFAHFO Flood Watch National Weather Service Honolulu HI 313 AM HST Wed Mar 10 2021 ...FLASH FLOOD WATCH FOR ALL ISLANDS UNTIL 6 PM HST TODAY... HIZ023>028-110315- /O.CON.PHFO.FF.A.0006.000000T0000Z-210311T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Kona-South Big Island-Big Island North and East-Kohala-Big Island Interior-Big Island Summits- 313 AM HST Wed Mar 10 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH THIS AFTERNOON... The Flash Flood Watch continues for * The Big Island. * Through this afternoon * A low pressure system west of Kauai will keep the island atmosphere moist and unstable, maintaining the potential for locally heavy rainfall. * Significant flooding may occur due to the overflow of streams and drainages. Roads in several areas may be closed, along with property damage in urban or low lying spots due to runoff. Landslides may also occur in areas with steep terrain. PRECAUTIONARY/PREPAREDNESS ACTIONS... Be prepared to take action if a Flash Flood Warning is issued. If you experience heavy rain or rising waters, head to higher ground immediately. A Flash Flood Watch means that conditions are favorable for flash flooding. Flash Flooding is LIFE THREATENING. Do not cross fast flowing water in your vehicle or on foot. && $$ HIZ001>022-110315- /O.CON.PHFO.FF.A.0006.000000T0000Z-210311T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Niihau-Kauai Windward-Kauai Leeward-Kauai Mountains-Oahu South Shore- Waianae Coast-Oahu North Shore-Oahu Koolau-Olomana-Central Oahu- Waianae Mountains-Molokai Windward-Molokai Leeward-Lanai Makai-Lanai Mauka-Kahoolawe-Maui Windward West-Maui Leeward West-Maui Central Valley-Windward Haleakala-Leeward Haleakala-Haleakala Summit- 313 AM HST Wed Mar 10 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH THIS AFTERNOON... The Flash Flood Watch continues for * Molokai, Kauai, Maui, Lanai, Niihau, Oahu and Kahoolawe. * Through this afternoon * A low pressure system west of Kauai will keep the island atmosphere moist and unstable, maintaining the potential for locally heavy rainfall. Heavy rain above Kaupakalua Dam may bring the risk of water overtopping the dam. * Significant flooding may occur due to the overflow of streams and drainages. Roads in several areas may be closed, along with property damage in urban or low lying spots due to runoff. Landslides may also occur in areas with steep terrain. PRECAUTIONARY/PREPAREDNESS ACTIONS... Be prepared to take action if a Flash Flood Warning is issued. If you experience heavy rain or rising waters, head to higher ground immediately. A Flash Flood Watch means that conditions are favorable for flash flooding. Flash Flooding is LIFE THREATENING. Do not cross fast flowing water in your vehicle or on foot. && $$ Birchard
347 WGHW60 PHFO 101823 FFAHFO URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Honolulu HI 823 AM HST Wed Mar 10 2021 ...FLASH FLOOD WATCH FOR ALL ISLANDS UNTIL 6 PM FRIDAY... HIZ023>028-110830- /O.EXT.PHFO.FF.A.0006.000000T0000Z-210313T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Kona-South Big Island-Big Island North and East-Kohala-Big Island Interior-Big Island Summits- 823 AM HST Wed Mar 10 2021 ...FLASH FLOOD WATCH NOW IN EFFECT THROUGH FRIDAY AFTERNOON... The Flash Flood Watch is now in effect for * The Big Island. * Through Friday afternoon * A low west of Kauai will keep the atmosphere moist and unstable, maintaining the potential for locally heavy rainfall. * Significant flooding may occur due to the overflow of streams and drainages. Roads in several areas may be closed, along with property damage in urban or low lying spots due to runoff. Landslides may occur in areas with steep terrain. PRECAUTIONARY/PREPAREDNESS ACTIONS... Be prepared to take action if a Flash Flood Warning is issued. If you experience heavy rain or rising waters, head to higher ground immediately. A Flash Flood Watch means that conditions are favorable for flash flooding. Flash Flooding is LIFE THREATENING. Do not cross fast flowing water in your vehicle or on foot. && $$ HIZ001>022-110830- /O.EXT.PHFO.FF.A.0006.000000T0000Z-210313T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Niihau-Kauai Windward-Kauai Leeward-Kauai Mountains-Oahu South Shore- Waianae Coast-Oahu North Shore-Oahu Koolau-Olomana-Central Oahu- Waianae Mountains-Molokai Windward-Molokai Leeward-Lanai Makai-Lanai Mauka-Kahoolawe-Maui Windward West-Maui Leeward West-Maui Central Valley-Windward Haleakala-Leeward Haleakala-Haleakala Summit- 823 AM HST Wed Mar 10 2021 ...FLASH FLOOD WATCH NOW IN EFFECT THROUGH FRIDAY AFTERNOON... The Flash Flood Watch is now in effect for * Molokai, Kauai, Maui, Lanai, Niihau, Oahu and Kahoolawe. * Through Friday afternoon * A low west of Kauai will keep the atmosphere moist and unstable, maintaining the potential for locally heavy rainfall. * Significant flooding may occur due to the overflow of streams and drainages. Roads in several areas may be closed, along with property damage in urban or low lying spots due to runoff. Landslides may also occur in areas with steep terrain. PRECAUTIONARY/PREPAREDNESS ACTIONS... Be prepared to take action if a Flash Flood Warning is issued. If you experience heavy rain or rising waters, head to higher ground immediately. A Flash Flood Watch means that conditions are favorable for flash flooding. Flash Flooding is LIFE THREATENING. Do not cross fast flowing water in your vehicle or on foot. && $$ DONALDSON
478 WGHW60 PHFO 110042 FFAHFO Flood Watch National Weather Service Honolulu HI 242 PM HST Wed Mar 10 2021 ...FLASH FLOOD WATCH FOR ALL ISLANDS UNTIL 6 PM FRIDAY... HIZ023>028-111445- /O.CON.PHFO.FF.A.0006.000000T0000Z-210313T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Kona-South Big Island-Big Island North and East-Kohala-Big Island Interior-Big Island Summits- 242 PM HST Wed Mar 10 2021 ...FLASH FLOOD WATCH IN EFFECT THROUGH FRIDAY AFTERNOON... The Flash Flood Watch continues for * The Big Island. * Through Friday afternoon * A low west of Kauai will keep the atmosphere moist and unstable, maintaining the potential for locally heavy rainfall. * Significant flooding may occur due to the overflow of streams and drainages. Roads in several areas may be closed, along with property damage in urban or low lying spots due to runoff. Landslides may occur in areas with steep terrain. PRECAUTIONARY/PREPAREDNESS ACTIONS... Be prepared to take action if a Flash Flood Warning is issued. If you experience heavy rain or rising waters, head to higher ground immediately. A Flash Flood Watch means that conditions are favorable for flash flooding. Flash Flooding is LIFE THREATENING. Do not cross fast flowing water in your vehicle or on foot. && $$ HIZ001>022-111445- /O.CON.PHFO.FF.A.0006.000000T0000Z-210313T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Niihau-Kauai Windward-Kauai Leeward-Kauai Mountains-Oahu South Shore- Waianae Coast-Oahu North Shore-Oahu Koolau-Olomana-Central Oahu- Waianae Mountains-Molokai Windward-Molokai Leeward-Lanai Makai-Lanai Mauka-Kahoolawe-Maui Windward West-Maui Leeward West-Maui Central Valley-Windward Haleakala-Leeward Haleakala-Haleakala Summit- 242 PM HST Wed Mar 10 2021 ...FLASH FLOOD WATCH IN EFFECT THROUGH FRIDAY AFTERNOON... The Flash Flood Watch continues for * Molokai, Kauai, Maui, Lanai, Niihau, Oahu and Kahoolawe. * Through Friday afternoon * A low west of Kauai will keep the atmosphere moist and unstable, maintaining the potential for locally heavy rainfall. * Significant flooding may occur due to the overflow of streams and drainages. Roads in several areas may be closed, along with property damage in urban or low lying spots due to runoff. Landslides may also occur in areas with steep terrain. PRECAUTIONARY/PREPAREDNESS ACTIONS... Be prepared to take action if a Flash Flood Warning is issued. If you experience heavy rain or rising waters, head to higher ground immediately. A Flash Flood Watch means that conditions are favorable for flash flooding. Flash Flooding is LIFE THREATENING. Do not cross fast flowing water in your vehicle or on foot. && $$ DONALDSON
139 WGHW60 PHFO 111333 FFAHFO Flood Watch National Weather Service Honolulu HI 333 AM HST Thu Mar 11 2021 ...FLASH FLOOD WATCH FOR ALL ISLANDS UNTIL 6 PM FRIDAY... HIZ001>028-120245- /O.CON.PHFO.FF.A.0006.000000T0000Z-210313T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Niihau-Kauai Windward-Kauai Leeward-Kauai Mountains- Oahu South Shore-Waianae Coast-Oahu North Shore-Oahu Koolau- Olomana-Central Oahu-Waianae Mountains-Molokai Windward- Molokai Leeward-Lanai Makai-Lanai Mauka-Kahoolawe- Maui Windward West-Maui Leeward West-Maui Central Valley- Windward Haleakala-Leeward Haleakala-Haleakala Summit-Kona- South Big Island-Big Island North and East-Kohala- Big Island Interior-Big Island Summits- 333 AM HST Thu Mar 11 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH FRIDAY AFTERNOON... The Flash Flood Watch continues for * Niihau, Kauai, Oahu, Molokai, Lanai, Maui, Kahoolawe and the Big Island. * Through Friday afternoon * A low west of Kauai will keep the atmosphere moist and unstable, maintaining the potential for locally heavy rainfall. * Significant flooding may occur due to the overflow of streams and drainages. Roads in several areas may be closed, along with property damage in urban or low lying spots due to runoff. Landslides may also occur in areas with steep terrain. PRECAUTIONARY/PREPAREDNESS ACTIONS... Be prepared to take action if a Flash Flood Warning is issued. If you experience heavy rain or rising waters, head to higher ground immediately. A Flash Flood Watch means that conditions are favorable for flash flooding. Flash Flooding is LIFE THREATENING. Do not cross fast flowing water in your vehicle or on foot. && $$ Gibbs
075 WGHW60 PHFO 120217 FFAHFO Flood Watch National Weather Service Honolulu HI 417 PM HST Thu Mar 11 2021 ...FLASH FLOOD WATCH FOR ALL ISLANDS UNTIL 6 PM FRIDAY... HIZ023>028-121630- /O.CON.PHFO.FF.A.0006.000000T0000Z-210313T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Kona-South Big Island-Big Island North and East-Kohala-Big Island Interior-Big Island Summits- 417 PM HST Thu Mar 11 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH FRIDAY AFTERNOON... The Flash Flood Watch continues for * The Big Island. * Through Friday afternoon * A low west of Kauai will keep the atmosphere warm, moist and unstable, maintaining the potential for localized intense rainfall and flash flooding. * Significant flooding may occur due to the overflow of streams and drainages. Roads in several areas may be closed, along with property damage in urban or low lying spots due to runoff. Landslides may occur in areas with steep terrain. PRECAUTIONARY/PREPAREDNESS ACTIONS... Be prepared to take action if a Flash Flood Warning is issued. If you experience heavy rain or rising waters, head to higher ground immediately. A Flash Flood Watch means that conditions are favorable for flash flooding. Flash Flooding is LIFE THREATENING. Do not cross fast flowing water in your vehicle or on foot. && $$ HIZ001>022-121630- /O.CON.PHFO.FF.A.0006.000000T0000Z-210313T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Niihau-Kauai Windward-Kauai Leeward-Kauai Mountains-Oahu South Shore- Waianae Coast-Oahu North Shore-Oahu Koolau-Olomana-Central Oahu- Waianae Mountains-Molokai Windward-Molokai Leeward-Lanai Makai-Lanai Mauka-Kahoolawe-Maui Windward West-Maui Leeward West-Maui Central Valley-Windward Haleakala-Leeward Haleakala-Haleakala Summit- 417 PM HST Thu Mar 11 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH FRIDAY AFTERNOON... The Flash Flood Watch continues for * Molokai, Kauai, Maui, Lanai, Niihau, Oahu and Kahoolawe. * Through Friday afternoon * A low west of Kauai will keep the atmosphere moist and unstable ahead of an approaching cold front, maintaining the potential for localized intense rainfall and flash flooding. * Significant flooding may occur due to the overflow of streams and drainages. Roads in several areas may be closed, along with property damage in urban or low lying spots due to runoff. Landslides may also occur in areas with steep terrain. PRECAUTIONARY/PREPAREDNESS ACTIONS... Be prepared to take action if a Flash Flood Warning is issued. If you experience heavy rain or rising waters, head to higher ground immediately. A Flash Flood Watch means that conditions are favorable for flash flooding. Flash Flooding is LIFE THREATENING. Do not cross fast flowing water in your vehicle or on foot. && $$ R BALLARD
528 WGHW60 PHFO 121337 FFAHFO URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Honolulu HI 337 AM HST Fri Mar 12 2021 ...FLASH FLOOD WATCH FOR ALL ISLANDS UNTIL 6 AM SATURDAY... HIZ001>028-130245- /O.EXT.PHFO.FF.A.0006.000000T0000Z-210313T1600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Niihau-Kauai Windward-Kauai Leeward-Kauai Mountains- Oahu South Shore-Waianae Coast-Oahu North Shore-Oahu Koolau- Olomana-Central Oahu-Waianae Mountains-Molokai Windward- Molokai Leeward-Lanai Makai-Lanai Mauka-Kahoolawe- Maui Windward West-Maui Leeward West-Maui Central Valley- Windward Haleakala-Leeward Haleakala-Haleakala Summit-Kona- South Big Island-Big Island North and East-Kohala- Big Island Interior-Big Island Summits- 337 AM HST Fri Mar 12 2021 ...FLASH FLOOD WATCH NOW IN EFFECT THROUGH LATE TONIGHT... The Flash Flood Watch is now in effect for * Niihau, Kauai, Oahu, Molokai, Lanai, Maui, Kahoolawe and the Big Island. * Through late tonight * A low west of Kauai will keep the atmosphere moist and unstable ahead of an approaching cold front, maintaining the potential for localized intense rainfall and flash flooding. * Significant flooding may occur due to the overflow of streams and drainages. Roads in several areas may be closed, along with property damage in urban or low lying spots due to runoff. Landslides may also occur in areas with steep terrain. PRECAUTIONARY/PREPAREDNESS ACTIONS... Be prepared to take action if a Flash Flood Warning is issued. If you experience heavy rain or rising waters, head to higher ground immediately. A Flash Flood Watch means that conditions are favorable for flash flooding. Flash Flooding is LIFE THREATENING. Do not cross fast flowing water in your vehicle or on foot. && $$ Gibbs
468 WGHW60 PHFO 130109 FFAHFO URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Honolulu HI 309 PM HST Fri Mar 12 2021 HIZ023>028-131515- /O.EXT.PHFO.FF.A.0006.000000T0000Z-210314T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Kona-South Big Island-Big Island North and East-Kohala-Big Island Interior-Big Island Summits- 309 PM HST Fri Mar 12 2021 ...FLASH FLOOD WATCH NOW IN EFFECT THROUGH SATURDAY AFTERNOON... The Flash Flood Watch is now in effect for * The Big Island. * Through Saturday afternoon * A front over the western half of the state, along with a moist and unstable atmosphere will maintain the potential for intense rainfall and flash flooding. * Significant flooding may occur due to the overflow of streams and drainages. Roads in several areas may be closed, along with property damage in urban or low lying spots due to runoff. Landslides may occur in areas with steep terrain. PRECAUTIONARY/PREPAREDNESS ACTIONS... Be prepared to take action if a Flash Flood Warning is issued. If you experience heavy rain or rising waters, head to higher ground immediately. A Flash Flood Watch means that conditions are favorable for flash flooding. Flash Flooding is LIFE THREATENING. Do not cross fast flowing water in your vehicle or on foot. && $$ HIZ001>022-131515- /O.EXT.PHFO.FF.A.0006.000000T0000Z-210314T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Niihau-Kauai Windward-Kauai Leeward-Kauai Mountains-Oahu South Shore- Waianae Coast-Oahu North Shore-Oahu Koolau-Olomana-Central Oahu- Waianae Mountains-Molokai Windward-Molokai Leeward-Lanai Makai-Lanai Mauka-Kahoolawe-Maui Windward West-Maui Leeward West-Maui Central Valley-Windward Haleakala-Leeward Haleakala-Haleakala Summit- 309 PM HST Fri Mar 12 2021 ...FLASH FLOOD WATCH NOW IN EFFECT THROUGH SATURDAY AFTERNOON... The Flash Flood Watch is now in effect for * Molokai, Kauai, Maui, Lanai, Niihau, Oahu and Kahoolawe. * Through Saturday afternoon * A front over the western half of the state, along with a moist and unstable atmosphere will maintain the potential for intense rainfall and flash flooding. * Significant flooding may occur due to the overflow of streams and drainages. Roads in several areas may be closed, along with property damage in urban or low lying spots due to runoff. Landslides may also occur in areas with steep terrain. PRECAUTIONARY/PREPAREDNESS ACTIONS... Be prepared to take action if a Flash Flood Warning is issued. If you experience heavy rain or rising waters, head to higher ground immediately. A Flash Flood Watch means that conditions are favorable for flash flooding. Flash Flooding is LIFE THREATENING. Do not cross fast flowing water in your vehicle or on foot. && $$
681 WGHW60 PHFO 131326 FFAHFO Flood Watch National Weather Service Honolulu HI 326 AM HST Sat Mar 13 2021 ...FLASH FLOOD WATCH FOR ALL ISLANDS UNTIL 6 PM TODAY... HIZ001>028-140230- /O.CON.PHFO.FF.A.0006.000000T0000Z-210314T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Niihau-Kauai Windward-Kauai Leeward-Kauai Mountains- Oahu South Shore-Waianae Coast-Oahu North Shore-Oahu Koolau- Olomana-Central Oahu-Waianae Mountains-Molokai Windward- Molokai Leeward-Lanai Makai-Lanai Mauka-Kahoolawe- Maui Windward West-Maui Leeward West-Maui Central Valley- Windward Haleakala-Leeward Haleakala-Haleakala Summit-Kona- South Big Island-Big Island North and East-Kohala- Big Island Interior-Big Island Summits- 326 AM HST Sat Mar 13 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH THIS AFTERNOON... The Flash Flood Watch continues for * Niihau, Kauai, Oahu, Molokai, Lanai, Maui, Kahoolawe and the Big Island. * Through this afternoon * A front moving into the eastern half of the state, along with a moist and unstable atmosphere will maintain the potential for intense rainfall and flash flooding. For Kauai and Oahu, northerly winds following the front will continue to support moderate to heavy showers along windward and northern slopes where grounds remain saturated and streams elevated. * Significant flooding may occur due to the overflow of streams and drainages. Roads in several areas may be closed, along with property damage in urban or low lying spots due to runoff. Landslides may also occur in areas with steep terrain. PRECAUTIONARY/PREPAREDNESS ACTIONS... Be prepared to take action if a Flash Flood Warning is issued. If you experience heavy rain or rising waters, head to higher ground immediately. A Flash Flood Watch means that conditions are favorable for flash flooding. Flash Flooding is LIFE THREATENING. Do not cross fast flowing water in your vehicle or on foot. && $$ Gibbs
789 WGHW60 PHFO 140156 FFAHFO URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Honolulu HI 356 PM HST Sat Mar 13 2021 ...FLASH FLOOD WATCH FOR ALL ISLANDS UNTIL 6 AM SUNDAY... HIZ023>028-141600- /O.EXT.PHFO.FF.A.0006.000000T0000Z-210314T1600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Kona-South Big Island-Big Island North and East-Kohala-Big Island Interior-Big Island Summits- 356 PM HST Sat Mar 13 2021 ...FLASH FLOOD WATCH NOW IN EFFECT THROUGH LATE TONIGHT... The Flash Flood Watch is now in effect for * The Big Island. * Through late tonight * A front over the western half of the state will maintain the potential for flash flooding through tonight. * Significant flooding may occur due to the overflow of streams and drainages. Roads in several areas may be closed, along with property damage in urban or low lying spots due to runoff. Landslides may occur in areas with steep terrain. PRECAUTIONARY/PREPAREDNESS ACTIONS... Be prepared to take action if a Flash Flood Warning is issued. If you experience heavy rain or rising waters, head to higher ground immediately. A Flash Flood Watch means that conditions are favorable for flash flooding. Flash Flooding is LIFE THREATENING. Do not cross fast flowing water in your vehicle or on foot. && $$ HIZ001>022-141600- /O.EXT.PHFO.FF.A.0006.000000T0000Z-210314T1600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Niihau-Kauai Windward-Kauai Leeward-Kauai Mountains-Oahu South Shore- Waianae Coast-Oahu North Shore-Oahu Koolau-Olomana-Central Oahu- Waianae Mountains-Molokai Windward-Molokai Leeward-Lanai Makai-Lanai Mauka-Kahoolawe-Maui Windward West-Maui Leeward West-Maui Central Valley-Windward Haleakala-Leeward Haleakala-Haleakala Summit- 356 PM HST Sat Mar 13 2021 ...FLASH FLOOD WATCH NOW IN EFFECT THROUGH LATE TONIGHT... The Flash Flood Watch is now in effect for * Molokai, Kauai, Maui, Lanai, Niihau, Oahu and Kahoolawe. * Through late tonight * A front over the western half of the state, and fast moving heavy showers over the eastern half of the state will maintain the potential for flash flooding through tonight. * Significant flooding may occur due to the overflow of streams and drainages. Roads in several areas may be closed, along with property damage in urban or low lying spots due to runoff. Landslides may also occur in areas with steep terrain. PRECAUTIONARY/PREPAREDNESS ACTIONS... Be prepared to take action if a Flash Flood Warning is issued. If you experience heavy rain or rising waters, head to higher ground immediately. A Flash Flood Watch means that conditions are favorable for flash flooding. Flash Flooding is LIFE THREATENING. Do not cross fast flowing water in your vehicle or on foot. && $$ Morrison
148 WGHW60 PHFO 141242 FFAHFO URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Honolulu HI 242 AM HST Sun Mar 14 2021 HIZ023>028-150245- /O.EXT.PHFO.FF.A.0006.000000T0000Z-210315T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Kona-South Big Island-Big Island North and East-Kohala-Big Island Interior-Big Island Summits- 242 AM HST Sun Mar 14 2021 ...FLASH FLOOD WATCH NOW IN EFFECT THROUGH THIS AFTERNOON... The Flash Flood Watch is now in effect for * The Big Island. * Through this afternoon * An upper level disturbance over the region and saturated ground conditions will maintain the potential for flash flooding through this afternoon. * Significant flooding may occur due to the overflow of streams and drainages. Roads in several areas may be closed, along with property damage in urban or low lying spots due to runoff. Landslides may occur in areas with steep terrain. PRECAUTIONARY/PREPAREDNESS ACTIONS... Be prepared to take action if a Flash Flood Warning is issued. If you experience heavy rain or rising waters, head to higher ground immediately. A Flash Flood Watch means that conditions are favorable for flash flooding. Flash Flooding is LIFE THREATENING. Do not cross fast flowing water in your vehicle or on foot. && $$ HIZ001>022-150245- /O.EXT.PHFO.FF.A.0006.000000T0000Z-210315T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Niihau-Kauai Windward-Kauai Leeward-Kauai Mountains-Oahu South Shore- Waianae Coast-Oahu North Shore-Oahu Koolau-Olomana-Central Oahu- Waianae Mountains-Molokai Windward-Molokai Leeward-Lanai Makai-Lanai Mauka-Kahoolawe-Maui Windward West-Maui Leeward West-Maui Central Valley-Windward Haleakala-Leeward Haleakala-Haleakala Summit- 242 AM HST Sun Mar 14 2021 ...FLASH FLOOD WATCH NOW IN EFFECT THROUGH THIS AFTERNOON... The Flash Flood Watch is now in effect for * Molokai, Kauai, Maui, Lanai, Niihau, Oahu and Kahoolawe. * Through this afternoon * An upper level disturbance over the region and saturated ground conditions will maintain the potential for flash flooding through this afternoon. * Significant flooding may occur due to the overflow of streams and drainages. Roads in several areas may be closed, along with property damage in urban or low lying spots due to runoff. Landslides may also occur in areas with steep terrain. PRECAUTIONARY/PREPAREDNESS ACTIONS... Be prepared to take action if a Flash Flood Warning is issued. If you experience heavy rain or rising waters, head to higher ground immediately. A Flash Flood Watch means that conditions are favorable for flash flooding. Flash Flooding is LIFE THREATENING. Do not cross fast flowing water in your vehicle or on foot. && $$ RCB
084 WGHW60 PHFO 150102 FFAHFO URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Honolulu HI 302 PM HST Sun Mar 14 2021 ...FLASH FLOOD WATCH FOR ALL ISLANDS UNTIL 6 PM MONDAY... HIZ023>028-151515- /O.EXT.PHFO.FF.A.0006.000000T0000Z-210316T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Kona-South Big Island-Big Island North and East-Kohala-Big Island Interior-Big Island Summits- 302 PM HST Sun Mar 14 2021 ...FLASH FLOOD WATCH NOW IN EFFECT THROUGH MONDAY AFTERNOON... The Flash Flood Watch is now in effect for * The Big Island. * Through Monday afternoon * The threat of widespread heavy rain is diminishing, but localized heavy rain is still likely through the day on Monday. Areas that have already received heavy rain will be most vulnerable. * Significant flooding may occur due to the overflow of streams and drainages. Roads in several areas may be closed, along with property damage in urban or low lying spots due to runoff. Landslides may occur in areas with steep terrain. PRECAUTIONARY/PREPAREDNESS ACTIONS... Be prepared to take action if a Flash Flood Warning is issued. If you experience heavy rain or rising waters, head to higher ground immediately. A Flash Flood Watch means that conditions are favorable for flash flooding. Flash Flooding is LIFE THREATENING. Do not cross fast flowing water in your vehicle or on foot. && $$ HIZ001>022-151515- /O.EXT.PHFO.FF.A.0006.000000T0000Z-210316T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Niihau-Kauai Windward-Kauai Leeward-Kauai Mountains-Oahu South Shore- Waianae Coast-Oahu North Shore-Oahu Koolau-Olomana-Central Oahu- Waianae Mountains-Molokai Windward-Molokai Leeward-Lanai Makai-Lanai Mauka-Kahoolawe-Maui Windward West-Maui Leeward West-Maui Central Valley-Windward Haleakala-Leeward Haleakala-Haleakala Summit- 302 PM HST Sun Mar 14 2021 ...FLASH FLOOD WATCH NOW IN EFFECT THROUGH MONDAY AFTERNOON... The Flash Flood Watch is now in effect for * Molokai, Kauai, Maui, Lanai, Niihau, Oahu and Kahoolawe. * Through Monday afternoon * The threat of widespread heavy rain is diminishing, but localized heavy rain is still likely through the day on Monday. Areas that have already received heavy rain will be most vulnerable. * Significant flooding may occur due to the overflow of streams and drainages. Roads in several areas may be closed, along with property damage in urban or low lying spots due to runoff. Landslides may also occur in areas with steep terrain. PRECAUTIONARY/PREPAREDNESS ACTIONS... Be prepared to take action if a Flash Flood Warning is issued. If you experience heavy rain or rising waters, head to higher ground immediately. A Flash Flood Watch means that conditions are favorable for flash flooding. Flash Flooding is LIFE THREATENING. Do not cross fast flowing water in your vehicle or on foot. && $$ DONALDSON
397 WGHW60 PHFO 151339 FFAHFO Flood Watch National Weather Service Honolulu HI 339 AM HST Mon Mar 15 2021 HIZ023>028-160345- /O.CON.PHFO.FF.A.0006.000000T0000Z-210316T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Kona-South Big Island-Big Island North and East-Kohala-Big Island Interior-Big Island Summits- 339 AM HST Mon Mar 15 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH THIS AFTERNOON... The Flash Flood Watch continues for * The Big Island. * Through this afternoon * The threat of widespread heavy rain is diminishing, but localized heavy rain is still likely through today. Areas that have already received heavy rain will be most vulnerable. * Significant flooding may occur due to the overflow of streams and drainages. Roads in several areas may be closed, along with property damage in urban or low lying spots due to runoff. Landslides may occur in areas with steep terrain. PRECAUTIONARY/PREPAREDNESS ACTIONS... Be prepared to take action if a Flash Flood Warning is issued. If you experience heavy rain or rising waters, head to higher ground immediately. A Flash Flood Watch means that conditions are favorable for flash flooding. Flash Flooding is LIFE THREATENING. Do not cross fast flowing water in your vehicle or on foot. && $$ HIZ001>022-160345- /O.CON.PHFO.FF.A.0006.000000T0000Z-210316T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Niihau-Kauai Windward-Kauai Leeward-Kauai Mountains-Oahu South Shore- Waianae Coast-Oahu North Shore-Oahu Koolau-Olomana-Central Oahu- Waianae Mountains-Molokai Windward-Molokai Leeward-Lanai Makai-Lanai Mauka-Kahoolawe-Maui Windward West-Maui Leeward West-Maui Central Valley-Windward Haleakala-Leeward Haleakala-Haleakala Summit- 339 AM HST Mon Mar 15 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH THIS AFTERNOON... The Flash Flood Watch continues for * Molokai, Kauai, Maui, Lanai, Niihau, Oahu and Kahoolawe. * Through this afternoon * The threat of widespread heavy rain is diminishing, but localized heavy rain is still likely through today. Areas that have already received heavy rain will be most vulnerable. * Significant flooding may occur due to the overflow of streams and drainages. Roads in several areas may be closed, along with property damage in urban or low lying spots due to runoff. Landslides may also occur in areas with steep terrain. PRECAUTIONARY/PREPAREDNESS ACTIONS... Be prepared to take action if a Flash Flood Warning is issued. If you experience heavy rain or rising waters, head to higher ground immediately. A Flash Flood Watch means that conditions are favorable for flash flooding. Flash Flooding is LIFE THREATENING. Do not cross fast flowing water in your vehicle or on foot. && $$ LAU
068 WGHW60 PHFO 160329 FFAHFO Flood Watch National Weather Service Honolulu HI 529 PM HST Mon Mar 15 2021 HIZ001>028-160430- /O.CAN.PHFO.FF.A.0006.000000T0000Z-210316T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Niihau-Kauai Windward-Kauai Leeward-Kauai Mountains-Oahu South Shore- Waianae Coast-Oahu North Shore-Oahu Koolau-Olomana-Central Oahu- Waianae Mountains-Molokai Windward-Molokai Leeward-Lanai Makai-Lanai Mauka-Kahoolawe-Maui Windward West-Maui Leeward West-Maui Central Valley-Windward Haleakala-Leeward Haleakala-Haleakala Summit-Kona- South Big Island-Big Island North and East-Kohala-Big Island Interior-Big Island Summits- 529 PM HST Mon Mar 15 2021 ...FLASH FLOOD WATCH IS CANCELLED... The Flash Flood Watch for Molokai, Kauai, Maui, Lanai, Niihau, Oahu and Kahoolawe has been cancelled. Some heavy rain is still possible for the next few hours, but the threat of flooding has diminished. $$ DONALDSON
What forecasters said that day
The local office's own words before this flash flood watch 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 flash flood watch went out at Mar 7, 9:45 AM HST, 1 hour 35 minutes earlier.
Area forecast discussion, Mar 7, 9:45 AM HST, 1 hour 35 minutes before
Area Forecast Discussion National Weather Service Honolulu HI 945 AM HST Sun Mar 7 2021 .SYNOPSIS... Increasingly cloudy and showery weather is expected for the upcoming week as an upper level disturbance interacts with tropical moisture moving in from the southeast. Breezy trade winds will give way to lighter winds by mid-week as a surface trough moves over the islands. && .DISCUSSION... Breezy trade winds will persist for the next couple of days, potentially weakening during the second half of the upcoming week as a surface trough moves over the islands. The trough will bring an increase in deep-layer moisture starting Monday over the Big Island and Maui, bringing the potential for heavy rainfall that may become increasingly widespread Tuesday and Wednesday. However, there still remains a significant amount of uncertainty in the forecast, as the strength, location and movement of the trough will strongly dictate winds and weather (and waves) seen in the islands. A 1038 mb high centered well N of the islands is supporting breezy to locally strong trade winds, while an E-W oriented trough aloft is supporting a moderately unstable island atmosphere while delivering wispy high clouds to the Big Island. Incoming low-level moisture has diminished over the past 24 hours, but radar continues to show scattered moderate rain cores developing over windward slopes of most islands while leeward areas are mostly sunny. While a few windward showers are expected today and tonight, most areas will be drier than they were on Saturday. A subtle re-organization of the flow aloft over the islands is expected tonight and Monday, leading to increasing mid- and upper- level moisture over Maui and the Big Island. This moisture will spread to the other islands by Tuesday as the trough becomes N-S trough oriented and sharpens W of Kauai. This destabilizing trough aloft is expected to induce the formation of a low-level trough near or E of the islands initially, with the trough then moving W or NW through at least mid-week. Model guidance continues to offer subtle differences in the strength and location of the trough, but these are significant enough to introduce a large amount of uncertainty in most aspects of the forecast. We are certain that the forecast will need to be fine-tuned as things evolve, and be prepared for potential dramatic changes. If the trough sharpens just E of the islands on Tuesday (per latest GFS), the pressure gradient could tighten to the point that sustained 30-35 mph E/SE winds, and widespread heavy rain, would develop. If the trough is just a little farther to the NE (per latest ECMWF), much lighter winds, and less precipitation, would be expected. Despite the model differences for Tuesday and beyond, there is growing consensus that deep-layer moisture will increase over the Big Island and Maui starting Monday, spreading to the other islands on Tuesday. A Flash Flood Watch (FFA) for Maui and the Big Island, and a Winter Storm Watch for the Big Island Summits, will likely be issued later today. Generally speaking, the low-level trough will linger near the islands for most of the upcoming week, as will a trough aloft, so a significant drying trend is not anticipated anytime soon, and the FFA will likely include all islands at one point or another. && .AVIATION... VFR conditions prevail at all TAF sites with some brief periods of MVFR conditions occurring at PHTO in low clouds and shra. Expect these conditions to continue on into the evening hours. There will likely be brief periods of MVFR conditions elsewhere along windward slopes through the evening hours as low clouds interact with island terrain. AIRMET Tango is currently in effect over and immediately south thru west of mountain ranges on all islands due to low level mechanical turbulence. Little change is expected during the forecast period. && .MARINE... A large area of strong surface high pressure located approximately 1,200 nautical miles north of the state will slowly drift southeastward the next few days. This will provide a tight enough pressure gradient back across the islands to support sustained fresh to strong trades through Tuesday morning. This morning's satellite derived winds and offshore buoy observations generally indicate fresh trades surrounding the islands, locally strong through the channels and windward areas. Early week winds may occasionally gust to gale through the notoriously windier channels and bays around Maui County and the waters south of the Big Island. The presence of a vicinity trough of low pressure this week will maintain a higher chance for thunderstorms centered over the eastern half of the state. Fresh to strong trade winds are producing more agitated seas and increasing wind waves over exposed waters. These wind waves are combined with modest north swells and this will maintain elevated seas. A Small Craft Advisory (SCA) is in effect through early Monday morning for all Hawaiian waters to account for both strong trades and resultant rough seas. There will likely be an extension to the SCA as strong winds and elevated seas persist through Monday night. The latest numerical model forecast guidance is developing a vicinity trough or low over the area Tuesday or Wednesday and then slowly drags this trough across the state through the week. If this scenario does unfold, the trade flow pattern will be disrupted...locally strengthen winds near the trough axis while providing an overall significant weakening to mid to late week winds. Stay tuned for coastal water forecast updates as this scenario becomes less ambiguous in time. Persistent fresh to strong trade winds will cause surf to build along east-facing shores through Monday. A High Surf Advisory (HSA) for eastern exposures will likely be issued today for high eastern shore surf beginning tonight through possibly early Tuesday (depending on whether a trough develops or not). Ongoing lower period north swells will continue to decline through the day. Reinforcing small, medium period overlapping north and northwest swells will spread around the islands through mid week. These swells, in tandem with trade wind wave/east swell wrap, will generate medium surf heights along most north and west- facing shorelines through Monday. Diminishing northerly swells will trend north and west shoreline surf down to small heights from Tuesday into next weekend. Small, long period south and southwest swells, along with some trade wrap, will provide enough of background to support near seasonable surf along most south-facing shores through the week. && .HFO WATCHES/WARNINGS/ADVISORIES... Small Craft Advisory until 6 AM HST Monday for all Hawaiian waters. && DISCUSSION...Birchard AVIATION...Burke MARINE...Blood
The office that day
Everything else NWS Honolulu, HI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 7, 11:31 AM HST | Winter Storm Watch | HFO | Hawaii | 4 hr |
Nearby
Flash Flood Watches in Hawaii, 2021Every flash flood watch 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.