091 

WGHW50 PHFO 202037

FFWHFO

HIC003-202300-

/O.NEW.PHFO.FF.W.0019.260320T2037Z-260320T2300Z/

/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/



BULLETIN - EAS ACTIVATION REQUESTED

Flash Flood Warning

National Weather Service Honolulu HI

1037 AM HST Fri Mar 20 2026



The National Weather Service in Honolulu has issued a



* Flash Flood Warning for...

  The island of Oahu in Honolulu County



* Until 100 PM HST.



* At 1037 AM HST, radar indicated heavy rain continuing to move over 

  east Oahu. Rain was falling at a rate of 1 to 2.5 inches per hour. 

  Flash flooding is ongoing, especially in and around Honolulu, with 

  flowing water on roadways and stalled vehicles.



  HAZARD...Flash flooding caused by heavy rain.



  SOURCE...Radar.



  IMPACT...Flooding in drainages, streams, rivers, roads,

           properties, and other low-lying areas. Public road

           closures possible in some areas. Landslides are

           possible in steep terrain.



* Some locations that will experience flash flooding include...

  Honolulu, Waipio, Moanalua, Halawa, Salt Lake, Aiea, Kalihi, Pearl 

  City, Ahuimanu, Iroquois Point, Manoa, Kahaluu, Kaneohe, Waiahole, 

  Waipahu, Waikele, Palolo, Maunawili, Waikane and Ewa Beach.



PRECAUTIONARY/PREPAREDNESS ACTIONS...



Stay away from streams, rivers, drainage ditches, and culverts, even 

if they are currently dry.



Excessive runoff from heavy rainfall will cause flooding of drainage 

ditches and streams, streets, highways, properties, and other low 

lying spots.



&&



This warning may need to be extended beyond 100 PM HST if flooding 

persists.



This Flash Flood Warning replaces the previously issued Flood 

Advisory that was in effect for The island of Oahu in Honolulu 

County.



LAT...LON 2147 15783 2143 15779 2144 15778 2147 15779

      2147 15772 2146 15771 2141 15773 2134 15769

      2131 15764 2126 15769 2125 15772 2127 15773

      2125 15783 2129 15787 2130 15790 2129 15796

      2131 15797 2129 15811 2140 15818 2150 15783



FLASH FLOOD...RADAR INDICATED



$$



TS






311 

WGHW50 PHFO 202054

FFWHFO

HIC003-210000-

/O.EXT.PHFO.FF.W.0017.000000T0000Z-260321T0000Z/

/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/



BULLETIN - EAS ACTIVATION REQUESTED

Flash Flood Warning

National Weather Service Honolulu HI

1054 AM HST Fri Mar 20 2026



...FLASH FLOOD EMERGENCY FOR NORTHERN OAHU...



The National Weather Service in Honolulu has extended the



* Flash Flood Warning for...

  The island of Oahu in Honolulu County



* Until 200 PM HST.



* At 1054 AM HST, additional water continued to run off into the 

  Wahiawa Reservoir and area streams keeping water levels elevated. 

  Flood impacts from earlier rainfall are ongoing. Despite a lull in 

  rainfall at this time, additional areas of heavy rain are expected 

  through the day which would exacerbate existing flooding.



  This is a FLASH FLOOD EMERGENCY for Northern Oahu. This is a 

  PARTICULARLY DANGEROUS SITUATION. SEEK HIGHER GROUND NOW!



  HAZARD...Heavy rain producing life threatening flash flooding.



  SOURCE...Stream Gauges.



  IMPACT...Severe flooding in drainages, streams, rivers, roads,

           properties, and other low lying areas. Numerous public

           road closures expected, as well as landslides in steep

           terrain. Significant property damage expected to homes

           and other properties in low lying areas.



* Some locations that will experience flash flooding include...

  Wahiawa, Schofield Barracks, Wheeler Field, Haleiwa, Waialua, 

  Mililani, Hauula, Laie, Waianae, Punaluu, Kahuku, Nanakuli, 

  Waikane, Kaaawa, Helemano Housing, Whitmore Village, Waimea 

  Valley, Waimea Bay, Mokuleia and Pupukea.



PRECAUTIONARY/PREPAREDNESS ACTIONS...



Move to higher ground now! This is an extremely dangerous and 

life-threatening situation. Do not attempt to travel unless you are 

fleeing an area subject to flooding or under an evacuation order.



Stay away from streams, rivers, drainage ditches, and culverts, even 

if they are currently dry.



The heavy rains may cause rock and mudslides in steep terrain areas.



&&



This warning may need to be extended beyond 200 PM HST if flooding 

persists.



LAT...LON 2148 15824 2153 15825 2157 15829 2158 15829

      2159 15828 2160 15813 2169 15805 2173 15798

      2155 15783 2150 15783 2140 15818



FLASH FLOOD...GAUGE INDICATED

FLASH FLOOD DAMAGE THREAT...CATASTROPHIC



$$



TS