Alert archive / Hawaii / Flash Flood Warnings in 2018
Flash Flood Warning 34, NWS Honolulu, HI
NWS Honolulu, HI issued this flash flood warning at Apr 15, 2018, 2:09 AM HST for Kauai County, Hawaii. It was in force for 24 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
- Apr 15, 2018, 2:09 AM HST (12:09 UTC)
- Expired
- Apr 16, 2018, 1:45 AM HST
- In force
- 24 hr
- Issued by
- NWS Honolulu, HI
- Area
- Storm-based polygon
- Flood severity
- None
County Kauai County, HI
The radar
The South Kauai radar (PHKI), 24 km from the middle of the area, began a volume at 12:08 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 |
|---|---|---|---|
| Apr 15, 4:00 AM HST | FLASH FLOOD | Haena, HI | VISITORS IN THE HANALEI COLONY RESORT IN HAENA HAVE BEEN MOVED TO THE SECOND FLOOR DUE TO RISING WATER. |
| Apr 15, 4:00 AM HST | FLASH FLOOD | Hanalei, HI | STANDING WATER UP TO 8 FEET OVER THE HIGHWAY AND AREAS IN THE TOWN WAS COMPLETELY COVERING VEHICLES. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
Did it verify
Verified. The Iowa Environmental Mesonet's Cow matched 2 storm reports to this flash flood warning; the first came 111 minutes after it went out.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Lihue, (PHLI), launched 12:00Z, 0.2 hours before the alert went out and 20 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
- 493 J/kg
- Mixed-layer CIN
- -7 J/kg
- Mixed-layer LCL
- 730 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 102 m²/s²
- 0-3 km storm-relative helicity
- 210 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 5.9
The text
As transmitted.
360
WGHW50 PHFO 151209
FFWHFO
HIC007-151445-
/O.NEW.PHFO.FF.W.0034.180415T1209Z-180415T1445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Honolulu HI
209 AM HST SUN APR 15 2018
The National Weather Service in Honolulu has issued a
* Flash Flood Warning for...
The island of Kauai in Kauai County
* Until 445 AM HST
* At 205 AM HST, radar indicated heavy showers and thunderstorms
continuing to develop over Kauai, especially over the northern
portion of the island between Kilauea and Haena. Rainfall rates of
2 to 4 inches per hour with locally higher amounts are occurring.
The Hanalei Stream remains elevated above the critical flood
stage. The Hanapepe and Wainiha Streams have also begun to rise
rapidly. The Kauai Emergency Management Agency earlier reported
that Kuhio Highway remained closed due to multiple landslides
between Princeville and Wainiha. This is a very dangerous
situation. Avoid unnecessary travel.
* Locations in the warning include the entire island of Kauai.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A flash flood warning means that flooding is imminent or occurring in
streams, roads, and low lying areas. Move to higher ground now.
Do not cross fast flowing water in your vehicle, or on foot. Turn
around, don't drown.
&&
This warning may need to be extended beyond 445 AM HST if heavy rain
persists.
A flash flood watch remains in effect for Kauai through 6 AM HST
Sunday.
LAT...LON 2221 15934 2215 15930 2205 15934 2197 15933
2188 15943 2191 15960 2189 15961 2202 15979
2206 15979 2216 15971 2223 15956 2221 15950
2223 15949 2222 15943 2224 15940
$$
Gibbs15 follow-up statements
012
WGHW50 PHFO 151438
FFWHFO
HIC007-151745-
/O.EXT.PHFO.FF.W.0034.000000T0000Z-180415T1745Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Honolulu HI
438 AM HST SUN APR 15 2018
The National Weather Service in Honolulu has extended the
* Flash Flood Warning for...
The island of Kauai in Kauai County
* Until 745 AM HST
* At 437 AM HST, radar indicated heavy showers and thunderstorms
continuing to develop over Kauai, especially over the northern
portion of the island where a historical flooding event is taking
place. Rainfall rates of 2 to 4 inches per hour with locally
higher amounts continue. The Hanalei Stream remains elevated and
is nearing record levels. The Hanapepe and Halaulani streams have
also quickly spiked to flood stage and could continue to rise. The
Kauai Emergency Management Agency reported that Kuhio Highway
remains closed due to multiple landslides that have occurred
between Princeville and Wainiha. Standing water up to 8 feet was
reported in the towns and across highways within this area, which
is completely covering some vehicles. This is a very dangerous
situation that is expanding to other portions of the island. Avoid
unnecessary travel.
* Locations in the warning include the entire island of Kauai.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A flash flood warning means that flooding is imminent or occurring in
streams, roads, and low lying areas. Move to higher ground now.
Do not cross fast flowing water in your vehicle, or on foot. Turn
around, don't drown.
&&
This warning may need to be extended beyond 745 AM HST if heavy rain
persists.
A flash flood watch remains in effect for Kauai through 6 PM HST
today.
LAT...LON 2221 15934 2215 15930 2205 15934 2197 15933
2188 15943 2191 15960 2189 15961 2202 15979
2206 15979 2216 15971 2223 15956 2221 15950
2223 15949 2222 15943 2224 15940
$$
Gibbs191
WGHW70 PHFO 151549
FFSHFO
Flash Flood Statement
National Weather Service Honolulu HI
549 AM HST SUN APR 15 2018
HIC007-151745-
/O.CON.PHFO.FF.W.0034.000000T0000Z-180415T1745Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Kauai HI-
549 AM HST SUN APR 15 2018
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 745 AM HST FOR THE
ISLAND OF KAUAI IN KAUAI COUNTY...
At 544 AM HST...radar and rain gage data indicated that the heaviest
rainfall has shifted eastward and is now over east and northeast
Kauai. Rain rates of 4 to 5 inches per hour were recorded over the
Wailua and upper Kapaa areas. Streams such as Anahola Stream and
Kapaa Stream are expected to rise to damaging levels. North Kauai
remains cutoff past Princeville with severe flooding from Hanalei to
Wainiha.
THIS IS A VERY DANGEROUS SITUATION. AVOID UNNECESSARY TRAVEL OVER
EAST AND NORTH KAUAI.
This warning includes the entire island of Kauai.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A flash flood warning means that flooding is imminent or occurring in
streams, roads, and low lying areas. Move to higher ground now.
Do not cross fast flowing water in your vehicle, or on foot. Turn
around, don't drown.
&&
This warning may need to be extended beyond 745 AM HST if heavy rain
persists.
LAT...LON 2221 15934 2215 15930 2205 15934 2197 15933
2188 15943 2191 15960 2189 15961 2202 15979
2206 15979 2216 15971 2223 15956 2221 15950
2223 15949 2222 15943 2224 15940
$$
Kodama809
WGHW50 PHFO 151738
FFWHFO
HIC007-152045-
/O.EXT.PHFO.FF.W.0034.000000T0000Z-180415T2045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Honolulu HI
738 AM HST SUN APR 15 2018
The National Weather Service in Honolulu has extended the
* Flash Flood Warning for...
The island of Kauai in Kauai County
* Until 1045 AM HST
* At 725 AM HST, radar showed that the size of heavy rainfall has
decreased but there were still areas with rates of 2 to 3 inches
per hour over the upper Kapaa and Wailua areas of east Kauai.
Access to areas west of Princeville remain cut off. Kapaa Stream
and Anahola Stream are out of bank and running very high. THIS IS
A VERY DANGEROUS AND LIFE THREATENING EVENT. AVOID UNNECESSARY
TRAVEL ESPECIALLY TO AREAS NORTH OF LIHUE.
* This warning includes the entire island of Kauai.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A flash flood warning means that flooding is imminent or occurring in
streams, roads, and low lying areas. Move to higher ground now.
Do not cross fast flowing water in your vehicle, or on foot. Turn
around, don't drown.
&&
This warning may need to be extended beyond 1045 AM HST if heavy rain
persists.
LAT...LON 2221 15934 2215 15930 2205 15934 2197 15933
2188 15943 2191 15960 2189 15961 2202 15979
2206 15979 2216 15971 2223 15956 2221 15950
2223 15949 2222 15943 2224 15940
$$
Kodama233
WGHW70 PHFO 151837
FFSHFO
Flash Flood Statement
National Weather Service Honolulu HI
837 AM HST SUN APR 15 2018
HIC007-152045-
/O.CON.PHFO.FF.W.0034.000000T0000Z-180415T2045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Kauai HI-
837 AM HST SUN APR 15 2018
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1045 AM HST FOR
THE ISLAND OF KAUAI IN KAUAI COUNTY...
At 828 AM HST...radar showed that rainfall has diminished
significantly with only a small area of rain along the coast near
Princeville and a small line near Kapaa and Wailua. Runoff and
flooding is still significant over north and east Kauai. There is no
road access to locations west of Princeville. Kuhio Highway is also
restricted to one lane near the Wailua Golf Course.
This warning includes the entire island of Kauai.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A flash flood warning means that flooding is imminent or occurring in
streams, roads, and low lying areas. Move to higher ground now.
Do not cross fast flowing water in your vehicle, or on foot. Turn
around, don't drown.
&&
This warning may need to be extended beyond 1045 AM HST if heavy rain
persists.
LAT...LON 2221 15934 2215 15930 2205 15934 2197 15933
2188 15943 2191 15960 2189 15961 2202 15979
2206 15979 2216 15971 2223 15956 2221 15950
2223 15949 2222 15943 2224 15940
$$
Kodama508
WGHW50 PHFO 152034
FFWHFO
HIC007-152345-
/O.EXT.PHFO.FF.W.0034.000000T0000Z-180415T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Honolulu HI
1034 AM HST SUN APR 15 2018
The National Weather Service in Honolulu has extended the
* Flash Flood Warning for...
The island of Kauai in Kauai County
* Until 145 PM HST
* At 1027 AM HST, radar showed an area of moderate to heavy rainfall
moving northward over north Kauai. This is likely to cause a brief
spike in Hanalei River and delay the draw down in water levels.
Runoff elsewhere has been receding. Road access to locations west
of Princeville is not yet possible. Avoid unnecessary travel to
north Kauai.
* This warning includes the entire island of Kauai.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A flash flood warning means that flooding is imminent or occurring in
streams, roads, and low lying areas. Move to higher ground now.
Do not cross fast flowing water in your vehicle, or on foot. Turn
around, don't drown.
&&
This warning may need to be extended beyond 145 PM HST if heavy rain
persists.
LAT...LON 2221 15934 2215 15930 2205 15934 2197 15933
2188 15943 2191 15960 2189 15961 2202 15979
2206 15979 2216 15971 2223 15956 2221 15950
2223 15949 2222 15943 2224 15940
$$
Kodama223
WGHW70 PHFO 152134
FFSHFO
Flash Flood Statement
National Weather Service Honolulu HI
1134 AM HST SUN APR 15 2018
HIC007-152345-
/O.CON.PHFO.FF.W.0034.000000T0000Z-180415T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Kauai HI-
1134 AM HST SUN APR 15 2018
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 145 PM HST FOR THE
ISLAND OF KAUAI IN KAUAI COUNTY...
At 1127 AM HST...intense rainfall has redeveloped over the Hanalei
and Wainiha River basins in the last hour. The highest rates of 3 to
4 inches per hour were focused on the Hanalei River basin and
another flood wave is likely headed toward Kuhio Highway. There is
no road access west of Princeville. THIS CONTINUES TO BE A VERY
DANGEROUS SITUATION, ESPECIALLY WITH COMPLETELY SATURATED
CONDITIONS. AVOID UNNECESSARY TRAVEL TO NORTH KAUAI.
This warning includes the entire island of Kauai.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A flash flood warning means that flooding is imminent or occurring in
streams, roads, and low lying areas. Move to higher ground now.
Do not cross fast flowing water in your vehicle, or on foot. Turn
around, don't drown.
&&
This warning may need to be extended beyond 145 PM HST if heavy rain
persists.
LAT...LON 2221 15934 2215 15930 2205 15934 2197 15933
2188 15943 2191 15960 2189 15961 2202 15979
2206 15979 2216 15971 2223 15956 2221 15950
2223 15949 2222 15943 2224 15940
$$
Kodama532
WGHW70 PHFO 152257
FFSHFO
Flash Flood Statement
National Weather Service Honolulu HI
1257 PM HST SUN APR 15 2018
HIC007-152345-
/O.CON.PHFO.FF.W.0034.000000T0000Z-180415T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Kauai HI-
1257 PM HST SUN APR 15 2018
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 145 PM HST FOR THE
ISLAND OF KAUAI IN KAUAI COUNTY...
At 1250 PM HST...intense rainfall continues over north and east
Kauai. Radar estimated rates of at least 4 to 5 inches per hour,
most of which was over the Hanalei River basin. The Hanalei River
gage stopped transmitting several hours ago but another large flood
wave has probably reached Kuhio Highway. Road access west of
Princeville is not possible and several communities are isolated due
to washed out roads. THIS CONTINUES TO BE A VERY DANGEROUS AND LIFE
THREATENING SITUATION. AVOID UNNECESSARY TRAVEL TO NORTH KAUAI.
This warning includes the entire island of Kauai.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A flash flood warning means that flooding is imminent or occurring in
streams, roads, and low lying areas. Move to higher ground now.
Do not cross fast flowing water in your vehicle, or on foot. Turn
around, don't drown.
&&
This warning may need to be extended beyond 145 PM HST if heavy rain
persists.
LAT...LON 2221 15934 2215 15930 2205 15934 2197 15933
2188 15943 2191 15960 2189 15961 2202 15979
2206 15979 2216 15971 2223 15956 2221 15950
2223 15949 2222 15943 2224 15940
$$
Kodama132
WGHW50 PHFO 152334
FFWHFO
HIC007-160245-
/O.EXT.PHFO.FF.W.0034.000000T0000Z-180416T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Honolulu HI
134 PM HST SUN APR 15 2018
The National Weather Service in Honolulu has extended the
* Flash Flood Warning for...
The island of Kauai in Kauai County
* Until 445 PM HST
* At 128 PM HST, intense rainfall with rates at least 4 to 5 inches
per hour continued over north and east Kauai. The heaviest
rainfall has spread east and will produce a rapid and significant
rise in the Kapaa Stream and Wailua River water levels. This is in
addition to the severe flooding ongoing in Hanalei River. Road
access west of Princeville is not possible and several communities
are isolated due to washed out roads. THIS CONTINUES TO BE A VERY
DANGEROUS AND LIFE THREATENING SITUATION. AVOID UNNECESSARY TRAVEL
TO NORTH AND EAST KAUAI.
* This warning includes the entire island of Kauai.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A flash flood warning means that flooding is imminent or occurring in
streams, roads, and low lying areas. Move to higher ground now.
Do not cross fast flowing water in your vehicle, or on foot. Turn
around, don't drown.
&&
This warning may need to be extended beyond 445 PM HST if heavy rain
persists.
LAT...LON 2221 15934 2215 15930 2205 15934 2197 15933
2188 15943 2191 15960 2189 15961 2202 15979
2206 15979 2216 15971 2223 15956 2221 15950
2223 15949 2222 15943 2224 15940
$$
Kodama203
WGHW70 PHFO 160050
FFSHFO
Flash Flood Statement
National Weather Service Honolulu HI
250 PM HST SUN APR 15 2018
HIC007-160245-
/O.CON.PHFO.FF.W.0034.000000T0000Z-180416T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Kauai HI-
250 PM HST SUN APR 15 2018
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 445 PM HST FOR THE
ISLAND OF KAUAI IN KAUAI COUNTY...
At 244 PM HST...the Kauai Emergency Management Agency reported that
the water level in Hanalei River is up to the base of the Hanalei
Bridge. Heavy rainfall has moved off the Hanalei River basin but is
still intense over east Kauai near Wailua and upper Kapaa. A rain
gage in Wailua recently recorded rain rates of 3 to 4 inches per
hour. East Kauai streams and rivers are running very high. Road
access west of Princeville is not possible and several communities
are isolated due to washed out roads. THIS CONTINUES TO BE A VERY
DANGEROUS AND LIFE THREATENING SITUATION. AVOID UNNECESSARY TRAVEL
IN NORTH AND EAST KAUAI.
This warning includes the entire island of Kauai.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A flash flood warning means that flooding is imminent or occurring in
streams, roads, and low lying areas. Move to higher ground now.
Do not cross fast flowing water in your vehicle, or on foot. Turn
around, don't drown.
&&
This warning may need to be extended beyond 445 PM HST if heavy rain
persists.
LAT...LON 2221 15934 2215 15930 2205 15934 2197 15933
2188 15943 2191 15960 2189 15961 2202 15979
2206 15979 2216 15971 2223 15956 2221 15950
2223 15949 2222 15943 2224 15940
$$
Kodama482
WGHW70 PHFO 160155
FFSHFO
Flash Flood Statement
National Weather Service Honolulu HI
355 PM HST SUN APR 15 2018
HIC007-160245-
/O.CON.PHFO.FF.W.0034.000000T0000Z-180416T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Kauai HI-
355 PM HST SUN APR 15 2018
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 445 PM HST FOR THE
ISLAND OF KAUAI IN KAUAI COUNTY...
At 348 PM HST...radar showed that heavy rainfall has moved
southwestward with the most intense areas currently over southeast
Kauai. Rain rates of 3 to 4 inches per hour were detected upslope
from Lihue with heavy rainfall also over Kuhio Highway between Lihue
and Kalaheo. Roads west of Princeville remain inaccessible and
several communities are isolated due to washed out roads. THIS
CONTINUES TO BE A VERY DANGEROUS AND LIFE THREATENING SITUATION.
AVOID UNNECESSARY TRAVEL IN NORTH AND EAST KAUAI.
This warning includes the entire island of Kauai.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A flash flood warning means that flooding is imminent or occurring in
streams, roads, and low lying areas. Move to higher ground now.
Do not cross fast flowing water in your vehicle, or on foot. Turn
around, don't drown.
&&
This warning may need to be extended beyond 445 PM HST if heavy rain
persists.
LAT...LON 2221 15934 2215 15930 2205 15934 2197 15933
2188 15943 2191 15960 2189 15961 2202 15979
2206 15979 2216 15971 2223 15956 2221 15950
2223 15949 2222 15943 2224 15940
$$
Kodama260
WGHW50 PHFO 160232
FFWHFO
HIC007-160545-
/O.EXT.PHFO.FF.W.0034.000000T0000Z-180416T0545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Honolulu HI
432 PM HST SUN APR 15 2018
The National Weather Service in Honolulu has extended the
* Flash Flood Warning for...
The island of Kauai in Kauai County
* Until 745 PM HST
* At 426 PM HST, radar showed that intense rainfall has shifted to
the southeast slopes of Kauai with rain rates of 3 to 4 inches per
hour. This rainfall will produce very high water levels in the
South Fork of Wailua River and in Huleia Stream near Lihue. Heavy
rainfall was also over Kuhio Highway between Lihue and Lawai.
Roads west of Princeville remain inaccessible and several
communities are isolated due to washed out roads. THIS CONTINUES
TO BE A VERY DANGEROUS AND LIFE THREATENING SITUATION. AVOID
UNNECESSARY TRAVEL.
* This warning includes the entire island of Kauai.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A flash flood warning means that flooding is imminent or occurring in
streams, roads, and low lying areas. Move to higher ground now.
Do not cross fast flowing water in your vehicle, or on foot. Turn
around, don't drown.
&&
This warning may need to be extended beyond 745 PM HST if heavy rain
persists.
LAT...LON 2221 15934 2215 15930 2205 15934 2197 15933
2188 15943 2191 15960 2189 15961 2202 15979
2206 15979 2216 15971 2223 15956 2221 15950
2223 15949 2222 15943 2224 15940
$$
Kodama036
WGHW70 PHFO 160345
FFSHFO
Flash Flood Statement
National Weather Service Honolulu HI
545 PM HST SUN APR 15 2018
HIC007-160545-
/O.CON.PHFO.FF.W.0034.000000T0000Z-180416T0545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Kauai HI-
545 PM HST SUN APR 15 2018
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 745 PM HST FOR THE
ISLAND OF KAUAI IN KAUAI COUNTY...
At 535 PM HST...radar showed that rainfall has diminished over
Kauai. The remaining area of rain was over the south slopes of the
island near Kalaheo with rates of less than an inch per hour.
However, runoff levels remain high. The Kauai Emergency Management
Agency reported that the Kaumualii Highway and Koloa Road junction
is impassable due to flooding. Piko Road and Kua Road were also
flooded. The water level in Hanalei River has been slowly dropping
but Kuhio Highway at the Hanalei Bridge remains closed.
This warning includes the entire island of Kauai.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A flash flood warning means that flooding is imminent or occurring in
streams, roads, and low lying areas. Move to higher ground now.
Do not cross fast flowing water in your vehicle, or on foot. Turn
around, don't drown.
&&
This warning may need to be extended beyond 745 PM HST if heavy rain
persists.
LAT...LON 2221 15934 2215 15930 2205 15934 2197 15933
2188 15943 2191 15960 2189 15961 2202 15979
2206 15979 2216 15971 2223 15956 2221 15950
2223 15949 2222 15943 2224 15940
$$
Kodama802
WGHW50 PHFO 160536
FFWHFO
HIC007-160845-
/O.EXT.PHFO.FF.W.0034.000000T0000Z-180416T0845Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Honolulu HI
736 PM HST SUN APR 15 2018
The National Weather Service in Honolulu has extended the
* Flash Flood Warning for...
The island of Kauai in Kauai County
* Until 1045 PM HST
* At 735 PM HST, radar indicated that rainfall has diminished in
intensity, with mainly light rainfall occurring over the interior
of the Island with rainfall rates less than a half inch per hour.
However, stream levels remain high and heavy runoff continues. The
Kauai Emergency Management Agency reported that one lane of
Kaumualii Highway remains closed between Piko Road and Kaloa Road
due to flooding. Additionally, Kuhio Highway remains inaccessible
between Princeville and Haena.
* This warning includes the entire island of Kauai.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A flash flood warning means that flooding is imminent or occurring in
streams, roads, and low lying areas. Move to higher ground now.
Do not cross fast flowing water in your vehicle, or on foot. Turn
around, don't drown.
&&
This warning may need to be extended beyond 1045 PM HST if heavy rain
persists.
A flash flood watch remains in effect for Kauai through 6 AM HST
Monday.
LAT...LON 2221 15934 2215 15930 2205 15934 2197 15933
2188 15943 2191 15960 2189 15961 2202 15979
2206 15979 2216 15971 2223 15956 2221 15950
2223 15949 2222 15943 2224 15940
$$
Jelsema704
WGHW50 PHFO 160838
FFWHFO
HIC007-161145-
/O.EXT.PHFO.FF.W.0034.000000T0000Z-180416T1145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Honolulu HI
1038 PM HST SUN APR 15 2018
The National Weather Service in Honolulu has extended the
* Flash Flood Warning for...
The island of Kauai in Kauai County
* Until 145 AM HST
* At 1035 PM HST, radar indicated that light to occasionally
moderate rain continues to fall primarily over windward and
interior sections of the island, with rainfall rates less than
half an inch per hour. Although conditions are slowly improving
and stream levels are trending downward, the Kauai Emergency
Management Agency reports that Kuhio Highway remains closed at the
Hanalei Bridge.
* This warning includes the entire island of Kauai.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A flash flood warning means that flooding is imminent or occurring in
streams, roads, and low lying areas. Move to higher ground now.
Do not cross fast flowing water in your vehicle, or on foot. Turn
around, don't drown.
&&
This warning may need to be extended beyond 145 AM HST if flooding
persists.
LAT...LON 2221 15934 2215 15930 2205 15934 2197 15933
2188 15943 2191 15960 2189 15961 2202 15979
2206 15979 2216 15971 2223 15956 2221 15950
2223 15949 2222 15943 2224 15940
$$
Jelsema202
WGHW70 PHFO 161140
FFSHFO
Flash Flood Statement
National Weather Service Honolulu HI
140 AM HST MON APR 16 2018
HIC007-161145-
/O.EXP.PHFO.FF.W.0034.000000T0000Z-180416T1145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Kauai HI-
140 AM HST MON APR 16 2018
...THE FLASH FLOOD WARNING FOR THE ISLAND OF KAUAI IN KAUAI COUNTY
WILL EXPIRE AT 145 AM HST...
Flood waters have receded, and are no longer expected to pose a
threat to life or property. However, Kauai Emergency Management
Agency reports that Kuhio Highway will remain closed in the vicinity
of the Hanalei Bridge until damage can be inspected and declared
safe for vehicular traffic.
LAT...LON 2221 15934 2215 15930 2205 15934 2197 15933
2188 15943 2191 15960 2189 15961 2202 15979
2206 15979 2216 15971 2223 15956 2221 15950
2223 15949 2222 15943 2224 15940
$$
JelsemaWhat forecasters said that day
The local office's own words before this flash flood 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 flash flood warning went out at Apr 14, 8:42 PM HST, 5 hours 27 minutes earlier.
Area forecast discussion, Apr 14, 8:42 PM HST, 5 hours 27 minutes before
Area Forecast Discussion National Weather Service Honolulu HI 842 PM HST Sat Apr 14 2018 .UPDATE... No significant changes in the forecast are anticipated this evening, as the previous forecast remains on track. The flash flood watch remains in effect through 6 AM HST Sunday for all islands and will likely be extended through Sunday in the 4 AM HST package due to an upper level low, surface trough and plenty of deep layer moisture in place. && .SYNOPSIS... Breezy, wet, and unstable conditions will continue through at least tonight and possibly through the weekend. An upper level low to the west of the state will tap deep moisture in the breezy trade wind flow, maintaining the threat of heavy rain and thunderstorms. While the primary flood threat will be across windward slopes, all areas could experience heavy rainfall. As the upper level low slowly moves away on Monday and Tuesday, the breezy trade wind flow will gradually stabilize, causing typical rainfall to focus along windward slopes. Breezy trade winds and extensive high clouds will hold through much of the week, with unsettled weather possible late in the work week. && .DISCUSSION... Wet and unstable conditions remain in place. An upper level low parked several hundred miles west of Kauai is generating the instability along with a shield of high clouds blanketing much of the state. The afternoon soundings continued to show no inversion, and recent satellite data revealed precipitable water (PW) values holding in the 1.5 to 1.8 inch range, which is well above the roughly 1.25 inch April normal. A strong surface high passing far north of the state is driving the breezy and gusty trades, while a subtle mid level trough appears to stretch from northeast to southwest just west of Kauai. It is this subtle trough that has been focusing heavy showers and thunderstorms over the Garden Isle, where in excess of 3 inches of rain has been measured at several north shore gauges in the past 6 hours. From Oahu to Maui, moderate to briefly heavy showers have been largely confined to windward slopes today. On the Big Island, more persistent heavy showers and thunderstorms have been pulsing along windward slopes, and leeward shower activity has been somewhat subdued, probably due to high cloud cover. The threat of heavy, flooding showers and thunderstorms in the breezy trade wind flow will persist through at least tonight. The subtle mid level trough near Kauai will drift westward, taking a focusing mechanism for moisture away from the islands. However, deep moisture will linger over the islands, and the GFS model is showing a weak shortwave aloft passing over the entire state tonight. This points toward a threat of continued heavy, flooding rainfall and a chance of thunderstorms for mainly windward slopes. That said, grounds are saturated in many locations, including some leeward areas, and a Flash Flood Watch remains in effect for all locations on all islands. The upper level low will begin to drift westward on Sunday, but unstable conditions will likely remain in place. The mid level trough will creep west and northwest of Kauai, leaving a broad area of convergence just north of the islands. High pressure to the north will maintain breezy trade winds, which will focus potentially heavy showers across windward slopes. That said, heavy showers could form over the leeward Big Island and Maui slopes during the afternoon. As a result, the Flash Flood Watch may need to be extended, though confidence is not high enough to do so at this time. The atmosphere will gradually stabilize on Monday and Tuesday locally breezy trade winds hold. The upper level low will slowly fill and drift westward, bringing an increase in stability and pulling the deepest moisture west of the islands. This will likely result in a drying trend over leeward areas of most islands, though moderate rainfall will persist over windward slopes. High clouds will still hang around over most areas. Some instability could return to the trade wind flow later in the week. The GFS and ECMWF show the weakened upper trough to the west being pushed back over the state on Thursday. If this occurs, heavy showers and thunderstorms could again be possible, with rainfall continuing to be focused along windward slopes. && .AVIATION... A complex weather pattern will continue tonight and tomorrow. Locally breezy E to ENE trade winds will continue at the surface through around 10-12 kft before veering out of the S. AIRMET TANGO for low level turbulence is posted across the state. An upper level low, providing instability, and ample moisture will maintain wet conditions with scattered thunderstorms for the state. The wettest conditions will remain along the windward and mountain areas, where AIRMET SIERRA for mountain obscuration is posted across windward areas on all islands and for all of Kauai. MVFR to isol IFR CIGS/VIS can be expected. AIRMET ZULU for tempo light ice in any layered clouds above the freezing level is also posted. && .MARINE... A Small Craft Advisory (SCA) is in effect for all waters through most of the weekend for seas and winds. Isolated thunderstorms remain likely over the coastal waters through tonight, with likelihood and coverage diminishing somewhat for Sunday, but still a possibility. A northwest swell peaked Saturday morning, and the nearshore buoys continue to show diminishing wave energy. A High Surf Advisory (HSA) remains through Sunday morning for north and west facing shores. A small north swell is expected mid-week with a moderate northwest swell building Thursday night. As trade winds strengthen Sunday, surf along east facing shores will increase to advisory levels with elevated east shore surf persisting into the first half of next week. Otherwise, surf will remain small along south facing shores, but new swells from the southern hemisphere will produce a modest increase starting as early as Sunday. See the Collaborative Surf Discussion for additional details on surf and swell. && .HFO WATCHES/WARNINGS/ADVISORIES... Flash Flood Watch until 6 AM Sunday for all Hawaii islands. High Surf Advisory until 6 AM HST Sunday for north and west facing shores of Niihau, Kauai, Oahu, and Molokai, and for north facing shores of Maui and the Big Island. High Surf Advisory until 6 PM HST Sunday for east facing shores of Kauai, Oahu, Molokai, Maui, and the Big Island. Small Craft Advisory for all waters. && UPDATE...Gibbs MARINE...Morrison AVIATION...Eaton REST OF DISCUSSION...Wroe
In the hours before
Local storm report, Apr 14, 10:55 PM HST, 3 hours 14 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HONOLULU HI
1055 PM HST SAT APR 14 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0200 PM FLASH FLOOD WAINIHA 22.21N 159.54W
04/14/2018 KAUAI HI EMERGENCY MNGR
KUHIO HIGHWAY CLOSED BETWEEN WAIKOKO AND WAINIHA DUE TO
LANDSLIDES
0234 PM FLASH FLOOD HAENA 22.22N 159.57W
04/14/2018 KAUAI HI EMERGENCY MNGR
KUHIO HIGHWAY CLOSED NEAR HAENA BEACH PARK
0700 PM FLASH FLOOD HANALEI 22.21N 159.50W
04/14/2018 KAUAI HI EMERGENCY MNGR
KUHIO HIGHWAY CLOSED
0800 PM FLASH FLOOD WAINIHA 22.21N 159.54W
04/14/2018 KAUAI HI EMERGENCY MNGR
WAINIHA POWERHOUSE ROAD WASHED OUT
0800 PM FLASH FLOOD WAINIHA 22.21N 159.54W
04/14/2018 KAUAI HI EMERGENCY MNGR
TWO HOMES DESTROYED ON WANIHA POWERHOUSE ROAD
&&
MORRISONSpecial weather statement, Apr 15, 12:56 AM HST, 1 hour 13 minutes before
Special Weather Statement
National Weather Service Honolulu HI
1256 AM HST SUN APR 15 2018
HIZ024-025-151200-
Big Island North and East-South Big Island-
1256 AM HST SUN APR 15 2018
...AN AREA OF STRONG THUNDERSTORMS WILL AFFECT HAWAII IN HAWAII
COUNTY...
At 1255 AM HST, strong thunderstorms were clustered 11 miles
southeast of Pahoa, or 30 miles southeast of Hilo, moving northwest
at 10 mph.
Winds in excess of 30 mph are possible with this storm.
Locations impacted include...
Hawaiian Paradise Park, Pahoa, Orchidlands Estates, Kalapana, Leilani
Estates, Hawaiian Beaches, Ainaloa, Nanawale Estates, Kapoho and
Isaac Hale Beach Park.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
LAT...LON 1950 15483 1948 15482 1934 15499 1932 15505
1934 15512 1961 15495 1956 15489 1954 15482
1951 15481
TIME...MOT...LOC 1055Z 114DEG 9KT 1935 15485
EATONThe office that day
Everything else NWS Honolulu, HI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 14, 2:43 PM HST | Areal Flood Advisory | HFO | Kauai | 3 hr |
| Apr 14, 3:11 PM HST | Areal Flood Advisory | HFO | Hawaii | 3 hr |
| Apr 14, 4:14 PM HST | Special Marine Warning | HFO | 46 min | |
| Apr 14, 4:56 PM HST | Special Marine Warning | HFO | 49 min | |
| Apr 14, 5:15 PM HST | Flash Flood Warning | HFO | Kauai | 9 hr |
| Apr 14, 5:24 PM HST | Areal Flood Advisory | HFO | Hawaii | 109 min |
| Apr 14, 5:42 PM HST | Special Marine Warning | HFO | 93 min | |
| Apr 14, 7:08 PM HST | Special Marine Warning | HFO | 72 min | |
| Apr 14, 10:37 PM HST | Areal Flood Advisory | HFO | Honolulu | 3 hr |
| Apr 14, 11:40 PM HST | Special Marine Warning | HFO | 2 hr | |
| Apr 15, 12:44 AM HST | Special Marine Warning | HFO | 54 min | |
| Apr 15, 12:56 AM HST | Special Weather Statement | HFO | 64 min | |
| Apr 15, 1:26 AM HST | Special Marine Warning | HFO | 64 min | |
| Apr 15, 1:50 AM HST | Areal Flood Advisory | HFO | Hawaii | 3 hr |
| Apr 15, 2:24 AM HST | Special Marine Warning | HFO | 96 min | |
| Apr 15, 4:24 AM HST | Areal Flood Advisory | HFO | Honolulu | 55 min |
| Apr 15, 4:31 AM HST | Flash Flood Warning | HFO | Hawaii | 3 hr |
| Apr 15, 4:43 AM HST | Special Marine Warning | HFO | 44 min | |
| Apr 15, 4:57 AM HST | Special Marine Warning | HFO | 2 hr | |
| Apr 15, 7:12 AM HST | Flash Flood Warning | HFO | Hawaii | 3 hr |
| Apr 15, 8:06 AM HST | Special Marine Warning | HFO | 84 min | |
| Apr 15, 9:24 AM HST | Special Marine Warning | HFO | 37 min | |
| Apr 15, 12:01 PM HST | Special Weather Statement | HFO | Kauai | 59 min |
| Apr 15, 1:01 PM HST | Special Weather Statement | HFO | Kauai | 59 min |
| Apr 15, 1:57 PM HST | Special Weather Statement | HFO | Kauai | 93 min |
Nearby
Flash Flood Warnings in Hawaii, 2018Every flash flood warning in 2018
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.