Alert archive / Hawaii / Flash Flood Warnings in 2021
Flash Flood Warning 16, NWS Honolulu, HI
NWS Honolulu, HI issued this flash flood warning at Mar 9, 2021, 3:21 PM HST for Honolulu County, Hawaii. It was in force for 9 hr. 2 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Mar 9, 2021, 3:21 PM HST (01:21 UTC)
- Expired
- Mar 10, 2021, 12:00 AM HST
- In force
- 9 hr
- Issued by
- NWS Honolulu, HI
- Area
- Storm-based polygon
- Emergency
- Flash flood emergency
- Damage threat
- Considerable
- Flood severity
- None
County Honolulu County, HI
The radar
The Molokai radar (PHMO), 82 km from the middle of the area, began a volume at 01:24 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Mar 9, 4:30 PM HST | FLASH FLOOD | 1 Sse Haleiwa, HI | OPAEULA STREAM HAD A LARGE SPIKE. FIRST RESPONDERS THERE TO ASSIST IN HALEIWA. |
| Mar 9, 5:25 PM HST | FLASH FLOOD | 1 Sse Haleiwa, HI | WATER GOING OVER KAMEHAMEHA HIGHWAY IN HALEIWA AT OPAEULA. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Lihue, (PHLI), launched 00:00Z, 1.4 hours before the alert went out and 162 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
- 295 J/kg
- Mixed-layer CIN
- -15 J/kg
- Mixed-layer LCL
- 704 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 38 m²/s²
- 0-3 km storm-relative helicity
- 137 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
The text
As transmitted.
219
WGHW50 PHFO 100121
FFWHFO
HIC003-100430-
/O.NEW.PHFO.FF.W.0016.210310T0121Z-210310T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Honolulu HI
321 PM HST Tue Mar 9 2021
The National Weather Service in Honolulu has issued a
* Flash Flood Warning for...
The island of Oahu in Honolulu County
* Until 630 PM HST.
* At 321 PM HST, radar indicated heavy rain over windward and north
shore Oahu. Rain was falling at a rate of 2.5 to 3.5 inches per
hour. Flash flooding is already occurring.
HAZARD...Heavy rain producing life threatening flash flooding.
SOURCE...Radar indicated.
IMPACT...Significant and life threatening flooding in
drainages, streams, rivers, roads, properties, and
other low lying areas. Multiple public road closures
expected, as well as landslides in steep terrain.
* Some locations that will experience flash flooding include...
Punaluu, Waikane, Kaaawa, Hauula, Waiahole, Wahiawa, Mililani,
Laie, Kahaluu, Ahuimanu, Kahuku, Kaneohe, Haleiwa, Waialua,
Kaneohe Marine Base, Kalihi, Maunawili, Kailua, Manoa and Kahana
Valley State Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Stay away from streams, rivers, drainage ditches, and culverts, even
if they are currently dry.
Do not cross fast flowing or rising water in your vehicle, or on
foot. Turn around, don't drown.
&&
This warning may need to be extended beyond 630 PM HST if flooding
persists.
LAT...LON 2160 15819 2160 15813 2173 15800 2173 15797
2155 15783 2147 15783 2143 15779 2144 15778
2146 15779 2147 15778 2148 15772 2147 15771
2146 15771 2143 15772 2141 15774 2139 15774
2134 15783 2152 15801
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
DONALDSON8 follow-up statements
224
WGHW70 PHFO 100138
FFSHFO
Flash Flood Statement
National Weather Service Honolulu HI
338 PM HST Tue Mar 9 2021
HIC003-100430-
/O.CON.PHFO.FF.W.0016.000000T0000Z-210310T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Honolulu HI-
338 PM HST Tue Mar 9 2021
...FLASH FLOOD EMERGENCY FOR HALEIWA...
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 630 PM HST THIS
EVENING FOR THE ISLAND OF OAHU IN HONOLULU COUNTY...
At 338 PM HST, the Opaeula Stream reported an extremely large rise
in water level. This may result in significant flooding of homes and
roads in Haleiwa town along Opaeula Stream below the Joseph Leong
Highway Bridge. Flooding is also ongoing along windward Oahu from
Kaneohe to Kahuku.
This is a FLASH FLOOD EMERGENCY for Haleiwa. 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...
Punaluu, Waikane, Kaaawa, Hauula, Waiahole, Wahiawa, Mililani,
Laie, Kahaluu, Ahuimanu, Kahuku, Kaneohe, Haleiwa, Waialua,
Kaneohe Marine Base, Kalihi, Maunawili, Kailua, Manoa and Kahana
Valley State Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Stay away from streams, rivers, drainage ditches, and culverts, even
if they are currently dry.
Do not cross fast flowing or rising water in your vehicle, or on
foot. Turn around, don't drown.
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.
&&
This warning may need to be extended beyond 630 PM HST if flooding
persists.
LAT...LON 2160 15819 2160 15813 2173 15800 2173 15797
2155 15783 2147 15783 2143 15779 2144 15778
2146 15779 2147 15778 2148 15772 2147 15771
2146 15771 2143 15772 2141 15774 2139 15774
2134 15783 2152 15801
FLASH FLOOD...GAUGE INDICATED
FLASH FLOOD DAMAGE THREAT...CATASTROPHIC
$$
KODAMA390
WGHW70 PHFO 100306
FFSHFO
Flash Flood Statement
National Weather Service Honolulu HI
506 PM HST Tue Mar 9 2021
HIC003-100430-
/O.CON.PHFO.FF.W.0016.000000T0000Z-210310T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Honolulu HI-
506 PM HST Tue Mar 9 2021
...FLASH FLOOD EMERGENCY FOR HALEIWA...
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 630 PM HST THIS
EVENING FOR THE ISLAND OF OAHU IN HONOLULU COUNTY...
At 506 PM HST, a National Weather Service employee reported Opaeula
Stream is running very high at the Rainbow Bridge, and Anahulu River
is out of bank above the bypass road. Heavy rainfall continues over
the Koolau Range with rates of 2 to 3 inches per hour.
This is a FLASH FLOOD EMERGENCY for Haleiwa. This is a PARTICULARLY
DANGEROUS SITUATION. SEEK HIGHER GROUND NOW!
HAZARD...Heavy rain producing life threatening flash flooding.
SOURCE...Trained spotters.
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. Opaeula Stream
will directly impact homes and structures along Paalaa
Road below Kamehameha Highway.
Some locations that will experience flash flooding include...
Punaluu, Waikane, Kaaawa, Hauula, Waiahole, Wahiawa, Mililani,
Laie, Kahaluu, Ahuimanu, Kahuku, Kaneohe, Haleiwa, Waialua,
Kaneohe Marine Base, Kalihi, Maunawili, Kailua, Manoa and Kahana
Valley State Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Stay away from streams, rivers, drainage ditches, and culverts, even
if they are currently dry.
Do not cross fast flowing or rising water in your vehicle, or on
foot. Turn around, don't drown.
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.
&&
This warning may need to be extended beyond 630 PM HST if flooding
persists.
LAT...LON 2160 15819 2160 15813 2173 15800 2173 15797
2155 15783 2147 15783 2143 15779 2144 15778
2146 15779 2147 15778 2148 15772 2147 15771
2146 15771 2143 15772 2141 15774 2139 15774
2134 15783 2152 15801
FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CATASTROPHIC
$$
KODAMA227
WGHW50 PHFO 100414
FFWHFO
HIC003-100730-
/O.EXT.PHFO.FF.W.0016.000000T0000Z-210310T0730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Honolulu HI
614 PM HST Tue Mar 9 2021
...FLASH FLOOD EMERGENCY FOR HALEIWA...
The National Weather Service in Honolulu has extended the
* Flash Flood Warning for...
The island of Oahu in Honolulu County
* Until 930 PM HST.
* At 614 PM HST, the Department of Emergency Management reported
that Opaeula Stream continues to flow at a very high level.
Portions of Haleiwa town have been evacuated and several homes
have been flooded. The bridge over Opaeula Stream at Haleiwa Road
was inundated by several feet of water. Rainfall over windward
Oahu has eased, but streams continue to run high, especially
Waiahole Stream and Kahana Stream.
This is a FLASH FLOOD EMERGENCY for Haleiwa. This is a
PARTICULARLY DANGEROUS SITUATION. SEEK HIGHER GROUND NOW!
HAZARD...Heavy rain producing life threatening flash flooding.
SOURCE...Trained spotters.
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...
Punaluu, Waikane, Kaaawa, Hauula, Waiahole, Wahiawa, Mililani,
Laie, Kahaluu, Ahuimanu, Kahuku, Kaneohe, Haleiwa, Waialua,
Kaneohe Marine Base, Kalihi, Maunawili, Kailua, Manoa and Kahana
Valley State Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Stay away from streams, rivers, drainage ditches, and culverts, even
if they are currently dry.
Do not cross fast flowing or rising water in your vehicle, or on
foot. Turn around, don't drown.
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.
&&
This warning may need to be extended beyond 930 PM HST if flooding
persists.
LAT...LON 2160 15819 2160 15813 2173 15800 2173 15797
2155 15783 2147 15783 2143 15779 2144 15778
2146 15779 2147 15778 2148 15772 2147 15771
2146 15771 2143 15772 2141 15774 2139 15774
2134 15783 2152 15801
FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CATASTROPHIC
$$
KODAMA296
WGHW70 PHFO 100702
FFSHFO
Flash Flood Statement
National Weather Service Honolulu HI
902 PM HST Tue Mar 9 2021
HIC003-100730-
/O.CON.PHFO.FF.W.0016.000000T0000Z-210310T0730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Honolulu HI-
902 PM HST Tue Mar 9 2021
...FLASH FLOOD EMERGENCY FOR HALEIWA...
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 930 PM HST THIS
EVENING FOR THE ISLAND OF OAHU IN HONOLULU COUNTY...
At 902 PM HST, the Department of Emergency Management reported that
Opaeula Stream continues to flow at a high level, though rainfall
over Windward Oahu and the North Shore has eased. Portions of
Haleiwa town remain evacuated with standing water in many areas and
several roads still closed due to flooding.
This is a FLASH FLOOD EMERGENCY for Haleiwa. This is a PARTICULARLY
DANGEROUS SITUATION. SEEK HIGHER GROUND NOW!
HAZARD...Heavy rain producing life threatening flash flooding.
SOURCE...Emergency management.
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...
Haleiwa, Waialua, Helemano Housing, Waimea Valley and Mokuleia.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Stay away from streams, rivers, drainage ditches, and culverts, even
if they are currently dry.
Do not cross fast flowing or rising water in your vehicle, or on
foot. Turn around, don't drown.
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.
&&
This warning may need to be extended beyond 930 PM HST if flooding
persists.
LAT...LON 2158 15815 2160 15818 2160 15813 2161 15812
2164 15808 2164 15807 2164 15801 2157 15791
2152 15800 2152 15801
FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CATASTROPHIC
$$
TS774
WGHW50 PHFO 100723
FFWHFO
HIC003-101030-
/O.EXT.PHFO.FF.W.0016.000000T0000Z-210310T1030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Honolulu HI
923 PM HST Tue Mar 9 2021
...FLASH FLOOD EMERGENCY FOR HALEIWA...
The National Weather Service in Honolulu has extended the
* Flash Flood Warning for...
The island of Oahu in Honolulu County
* Until 1230 AM HST.
* At 923 PM HST, The Department of Emergency Management reported
that rainfall over the North Shore has eased, with water receding.
Opaeula Stream continues to flow at a high level. Portions of
Haleiwa town remain evacuated with roadways still closed and
standing water along Haleiwa Road between Wailua Beach Road and
Smiley Place.
This is a FLASH FLOOD EMERGENCY for Haleiwa. This is a
PARTICULARLY DANGEROUS SITUATION. SEEK HIGHER GROUND NOW!
HAZARD...Heavy rain producing life threatening flash flooding.
SOURCE...Emergency management.
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...
Haleiwa, Waialua, Helemano Housing, Waimea Valley and Mokuleia.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Stay away from streams, rivers, drainage ditches, and culverts, even
if they are currently dry.
Do not cross fast flowing or rising water in your vehicle, or on
foot. Turn around, don't drown.
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.
&&
This warning may need to be extended beyond 1230 AM HST if flooding
persists.
LAT...LON 2158 15815 2160 15818 2160 15813 2161 15812
2164 15808 2164 15807 2164 15801 2157 15791
2152 15800 2152 15801
FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CATASTROPHIC
$$
TS795
WGHW70 PHFO 100739
FFSHFO
Flash Flood Statement
National Weather Service Honolulu HI
939 PM HST Tue Mar 9 2021
HIC003-101030-
/O.CON.PHFO.FF.W.0016.000000T0000Z-210310T1030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Honolulu HI-
939 PM HST Tue Mar 9 2021
...FLASH FLOOD EMERGENCY FOR HALEIWA...
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1230 AM HST WEDNESDAY
FOR THE ISLAND OF OAHU IN HONOLULU COUNTY...
At 939 PM HST, a gage on Kaukonahua stream in Waialua reported a
rapid rise in water levels, which could lead to signififcant
flooding of Otake Camp in Waialua. Elsewhere, portions of Haleiwa
town remain evacuated, with roadways still closed, and standing
water along Haleiwa Road between Wailua Beach Road and Smiley Place.
This is a FLASH FLOOD EMERGENCY for Haleiwa. 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...
Haleiwa, Waialua, Otake Camp, Waimea Valley and Mokuleia.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Stay away from streams, rivers, drainage ditches, and culverts, even
if they are currently dry.
Do not cross fast flowing or rising water in your vehicle, or on
foot. Turn around, don't drown.
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.
&&
This warning may need to be extended beyond 1230 AM HST if flooding
persists.
LAT...LON 2158 15815 2160 15818 2160 15813 2161 15812
2164 15808 2164 15807 2164 15801 2157 15791
2152 15800 2152 15801
FLASH FLOOD...GAUGE INDICATED
FLASH FLOOD DAMAGE THREAT...CATASTROPHIC
$$
Birchard014
WGHW70 PHFO 100856
FFSHFO
Flash Flood Statement
National Weather Service Honolulu HI
1056 PM HST Tue Mar 9 2021
HIC003-101030-
/O.CON.PHFO.FF.W.0016.000000T0000Z-210310T1030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Honolulu HI-
1056 PM HST Tue Mar 9 2021
...FLASH FLOOD EMERGENCY FOR HALEIWA...
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1230 AM HST WEDNESDAY
FOR THE ISLAND OF OAHU IN HONOLULU COUNTY...
At 1056 PM HST, radar indicated heavy rain has greatly diminished.
Flood waters are receding, though portions of Haleiwa town remain
evacuated with some roadways still closed due to flooding.
This is a FLASH FLOOD EMERGENCY for Haleiwa. This is a PARTICULARLY
DANGEROUS SITUATION. SEEK HIGHER GROUND NOW!
HAZARD...Heavy rain producing life threatening flash flooding.
SOURCE...Radar indicated.
IMPACT...Severe flooding in drainages, streams, rivers, roads,
properties, and other low lying areas. Numerous public
road closures expected, as well as landslides in steep
terrain. Significant property damage expected to homes
and other properties in low lying areas.
Some locations that will experience flash flooding include...
Haleiwa, Waialua, Helemano Housing, Waimea Valley and Mokuleia.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Stay away from streams, rivers, drainage ditches, and culverts, even
if they are currently dry.
Do not cross fast flowing or rising water in your vehicle, or on
foot. Turn around, don't drown.
Move to higher ground now! This is an extremely dangerous and
life-threatening situation. Do not attempt to travel unless you are
fleeing an area subject to flooding or under an evacuation order.
&&
This warning may need to be extended beyond 1230 AM HST if flooding
persists.
LAT...LON 2158 15815 2160 15818 2160 15813 2161 15812
2164 15808 2164 15807 2164 15801 2157 15791
2152 15800 2152 15801
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CATASTROPHIC
$$
TS992
WGHW70 PHFO 101000
FFSHFO
Flash Flood Statement
National Weather Service Honolulu HI
1200 AM HST Wed Mar 10 2021
HIC003-101010-
/O.CAN.PHFO.FF.W.0016.000000T0000Z-210310T1030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Honolulu HI-
1200 AM HST Wed Mar 10 2021
...FLASH FLOOD WARNING IS CANCELLED FOR THE ISLAND OF OAHU IN
HONOLULU COUNTY...
Heavy rain has ended and flood waters have receded. Flooding is no
longer expected to pose a threat.
A Flash Flood Watch remains in effect until 600 PM HST Wednesday for
portions of Kahoolawe Hawaii...Kauai Hawaii...Lanai Hawaii...Maui
Hawaii...Molokai Hawaii...Niihau Hawaii and Oahu Hawaii.
LAT...LON 2158 15815 2160 15818 2160 15813 2161 15812
2164 15808 2164 15807 2164 15801 2157 15791
2152 15800 2152 15801
$$
TSThe office that day
Everything else NWS Honolulu, HI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 9, 2:15 PM HST | Special Marine Warning | HFO | 30 min | |
| Mar 9, 2:21 PM HST | Special Weather Statement | HFO | Kauai | 39 min |
| Mar 9, 2:44 PM HST | Special Marine Warning | HFO | 46 min | |
| Mar 9, 3:08 PM HST | Special Weather Statement | HFO | Kauai | 37 min |
| Mar 9, 3:17 PM HST | Special Marine Warning | HFO | 88 min | |
| Mar 9, 3:24 PM HST | Special Marine Warning | HFO | 64 min | |
| Mar 9, 3:47 PM HST | Areal Flood Advisory | HFO | Kauai | 43 min |
| Mar 9, 4:18 PM HST | Special Weather Statement | HFO | Kauai | 57 min |
| Mar 9, 4:30 PM HST | Flash Flood Warning | HFO | Kauai | 17 hr |
| Mar 9, 8:33 PM HST | Special Marine Warning | HFO | 87 min | |
| Mar 9, 10:44 PM HST | Special Marine Warning | HFO | 2 hr | |
| Mar 9, 10:56 PM HST | Areal Flood Advisory | HFO | Kalawao | 3 hr |
| Mar 9, 11:03 PM HST | Special Marine Warning | HFO | 93 min | |
| Mar 9, 11:16 PM HST | Special Marine Warning | HFO | 76 min | |
| Mar 10, 12:45 AM HST | Special Marine Warning | HFO | 105 min | |
| Mar 10, 1:02 AM HST | Areal Flood Advisory | HFO | Hawaii | 4 hr |
| Mar 10, 2:20 AM HST | Special Marine Warning | HFO | 115 min | |
| Mar 10, 3:42 AM HST | Special Marine Warning | HFO | 2 hr | |
| Mar 10, 4:43 AM HST | Special Marine Warning | HFO | 2 hr | |
| Mar 10, 5:26 AM HST | Flash Flood Warning | HFO | Hawaii | 3 hr |
| Mar 10, 5:47 AM HST | Special Marine Warning | HFO | 118 min | |
| Mar 10, 6:36 AM HST | Flash Flood Warning | HFO | Hawaii | 3 hr |
| Mar 10, 7:43 AM HST | Special Marine Warning | HFO | 107 min | |
| Mar 10, 9:06 AM HST | Areal Flood Advisory | HFO | Hawaii | 115 min |
| Mar 10, 9:11 AM HST | Areal Flood Advisory | HFO | Kauai | 9 hr |
| Mar 10, 9:17 AM HST | Special Marine Warning | HFO | 118 min | |
| Mar 10, 10:11 AM HST | High Surf Advisory | HFO | Honolulu, Kalawao | 29 hr |
| Mar 10, 11:11 AM HST | Special Marine Warning | HFO | 2 hr | |
| Mar 10, 1:09 PM HST | Areal Flood Advisory | HFO | Honolulu | 36 min |
| Mar 10, 1:10 PM HST | Special Marine Warning | HFO | 110 min | |
| Mar 10, 1:45 PM HST | Flash Flood Warning | HFO | Honolulu | 3 hr |
Nearby
Flash Flood Warnings in Hawaii, 2021Every flash flood warning in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.