Severe Thunderstorm Warning 2, NWS Honolulu, HI

087 
WWHW50 PHFO 191554
SVSHFO

Severe Weather Statement
National Weather Service Honolulu HI
554 AM HST Mon Dec 19 2022

HIC007-191630-
/O.CON.PHFO.SV.W.0002.000000T0000Z-221219T1630Z/
Kauai in Kauai HI-
554 AM HST Mon Dec 19 2022

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 AM HST
FOR KAUAI IN KAUAI COUNTY...

At 554 AM HST, a severe thunderstorm was located 6 miles southeast of
Kokee State Park, moving east at 50 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

This severe thunderstorm will remain over sparsely populated areas of
Kauai in Kauai County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

&&

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
TIME...MOT...LOC 1554Z 271DEG 44KT 2209 15957 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Jelsema

599 
WWHW50 PHFO 191609
SVSHFO

Severe Weather Statement
National Weather Service Honolulu HI
609 AM HST Mon Dec 19 2022

HIC007-191630-
/O.CON.PHFO.SV.W.0002.000000T0000Z-221219T1630Z/
Kauai in Kauai HI-
609 AM HST Mon Dec 19 2022

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 AM HST
FOR KAUAI IN KAUAI COUNTY...

At 609 AM HST, a severe thunderstorm was located over Kealia, moving
east at 55 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

This severe thunderstorm will remain over sparsely populated areas of
Kauai in Kauai County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

&&

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
TIME...MOT...LOC 1609Z 269DEG 46KT 2210 15932 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$
R BALLARD

640 
WWHW50 PHFO 191620
SVSHFO

Severe Weather Statement
National Weather Service Honolulu HI
620 AM HST Mon Dec 19 2022

HIC007-191629-
/O.CAN.PHFO.SV.W.0002.000000T0000Z-221219T1630Z/
Kauai in Kauai HI-
620 AM HST Mon Dec 19 2022

...THE SEVERE THUNDERSTORM WARNING FOR KAUAI IN KAUAI COUNTY IS
CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 800 AM HST.

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
TIME...MOT...LOC 1612Z 272DEG 46KT 2210 15917 

$$

R Ballard

Area Forecast Discussion
National Weather Service Honolulu HI
417 AM HST Mon Dec 19 2022

.SYNOPSIS...
Numerous showers, heavy at times, and thunderstorms will continue
today as a kona storm moves through the region. Bands of strong
thunderstorms are moving through islands ahead of a vigorous cold
front that will sweep across the state from northwest to southeast
today. These stronger thunderstorms may become severe with strong
winds and the potential for hail. Strong southwesterly kona winds
will increase ahead of the cold front, with the strongest wind
speeds forecast for communities along the down wind north and east
slopes of mountain areas. Periods of heavy rain with this storm
may produce flash flooding in some areas. Weather conditions will
improve over the western islands later this afternoon and evening
and improve across the rest of the state by Tuesday morning. Fair
weather and light winds expected from Wednesday through the weekend.

&&

.DISCUSSION...
The short range weather forecast continues to show a wet and
unstable weather pattern for all islands today. Two bands of
showers and thunderstorms are passing through the Hawaii Region
this morning. The first band is producing numerous showers, heavy
at times, with scattered thunderstorms near Maui and the Big
Island. The second band is associated with the cold front and is
passing eastward through Kauai and Oahu this morning. This front
will continue to sweep eastward affecting all islands with
increasing winds, periods of heavy showers and scattered
thunderstorms ahead of the frontal trough.

Expect sustained southwest winds of 20 to 30 MPH with stronger
gusts today along with periods of heavy rain and thunderstorms.
These strong winds will be magnified by thunderstorms, including
mountain peaks and down wind of higher elevation areas. Mountain
peaks and communities along north and east slopes of mountains
will see much stronger wind speeds develop as the front gets
closer to each island. The timing of this cold frontal passage
will vary as the front sweeps eastward. Expect the front to pass
over Oahu today around 7 AM HST, Molokai and Lanai around noon
HST, reaching Maui around 1 PM HST, and finally over the western
Big Island around 6 PM HST.

A few of these strong thunderstorms moving over the western
islands will pull down stronger winds aloft to the surface,
increasing the threat for damaging and gusty winds over the
islands of Niihau, Kauai and Oahu this morning. A Severe
Thunderstorm Watch remains in effect for Kauai County and Oahu
this morning. This threat for severe thunderstorms may move
eastward to Maui County and possibly Hawaii County later today and
the Severe Thunderstorm Watch may need to be expanded eastward to
cover this damaging wind threat.

The potential for flash flooding will continue today for areas
ahead and along the cold front. Soil moisture is already saturated
from the rainfall yesterday and heavy rainfall will increase
flooding potential. Periods of intense rainfall rates of 3 to 4
inches per hour today may trigger flash flooding over any island.

Tuesday and Wednesday...Well-mixed, gusty westerlies build in
behind the cold front and focus showers over leeward slopes
through Tuesday. Fair weather with much lighter winds are expected
by Wednesday.

Thursday onward, light winds remain in the forecast lasting into
the weekend. Another front could approach and stall just west of
the state by Friday. Most of the moisture and instability looks to
stay well north of the island chain with this next frontal band.

&&

.AVIATION...
A strong cold front and an upper-level trough associated with a
deep low pressure system north of the main Hawaiian Islands
continue to move rapidly toward the east-southeast. The front
appears to be moving across Kauai early this morning, and will
eventually move from Oahu to the Big Island through this
afternoon. Unstable atmospheric conditions and enhanced moisture
are producing widespread cloud cover and rainfall along with
thunderstorms ahead of the front. This is a high impact weather
event, which is very unusual for the main Hawaiian Islands. ALL
aviation interests are urged to monitor the latest forecasts, and
use extra caution during the next 24 hours.

Widespread MVFR conditions, and localized IFR conditions, due to
low ceilings and reduced visibilities are occurring across most of
the state. AIRMET Sierra remains in effect for mountain
obscuration above 2 thousand feet for most islands. This AIRMET
may remain in effect for most of the state into this afternoon.

The thunderstorms in the vicinity of Hawaii continue to require a
convective SIGMET (XRAY series) early this morning. Note that
some thunderstorms may become severe. We have also mentioned the
potential for light icing occurring in clouds across most of the
state in the layer from 12 to 22 thousand feet in AIRMET Zulu.

As the front continues to move down the island chain, expect
significant strengthening of the low-level southwest to west
winds. AIRMET Tango is currently in effect for Tempo moderate
mechanical low-level turbulence below 9 thousand northwest through
southeast of the higher terrain on all islands. AIRMET Tango is
also in effect for sustained wind speeds of 30 kt or greater for
the western islands. These strong sustained winds will likely
spread to the rest of the state later today. Finally, we are
including AIRMET Tango for TEMPO moderate upper-level turbulence
in the layer from 18 to 30 thousand feet.

&&

.MARINE...
A robust cold front near Kauai will continue to move southeast
across the islands tonight, bringing a wide array of marine
hazards. These include the potential for gusty winds, hail and
waterspouts in and around strong to severe thunderstorms,
sustained near- gale to gale-force southwest to west winds, as
well as rapidly increasing seas and surf. A Gale warning continues
for all Hawaiian waters through this afternoon. Additionally, a
High Surf Warning (HSW) for exposed north and west facing shores
is in effect for a long lived northwest swell through Tuesday
afternoon. Less exposed shorelines may need a High Surf Advisory
(HSA), to be issued later, as the swell builds down the island
chain.

Even after the front moves east of the islands, west winds are
expected to remain strong to near-gale on Tuesday as low pressure
moves east passing a couple hundred miles north of the islands.
Winds will decline Tuesday night into Wednesday as the low departs
to the northeast and a ridge builds over the area.

The strong low pushing the cold front over the islands will
produce a long-lived and extra-large northwest swell that will
rapidly build into the islands and bring surf heights well above
High Surf Warning (HSW) levels. There is high potential for wave
run- up onto vulnerable roadways and coastal areas in the HSW
areas, with the most likely time for these impacts being tonight
into Tuesday morning during high tide. This swell is expected to
drop below warning thresholds Tuesday night into Wednesday. The
northwest Pacific remains active resulting in a large northwest
swell towards the end of the week near High Surf Advisory (HSA)
levels. Surf along south and west facing shores will also see an
increase in short- period wind waves tonight into Tuesday due to
the strong onshore winds.

&&

.HFO WATCHES/WARNINGS/ADVISORIES...
Severe Thunderstorm Watch 1 until this morning for Kauai County
and Oahu.

Flood Watch through late tonight for all Hawaiian Islands.

High Wind Warning until 6 PM HST this evening for all Hawaiian
Islands.

High Wind Warning until 6 AM HST Tuesday for Haleakala Summit.

High Wind Warning until 6 AM HST Wednesday for Big Island
Summits.

Winter Storm Warning until 6 AM HST Tuesday for Big Island
Summits.

Gale Warning until 6 PM HST this evening for all Hawaiian waters.

High Surf Warning through 6 PM HST Tuesday for north and west
facing shores of Niihau, Kauai, Oahu and Molokai, and north facing
shores of Maui.

&&

DISCUSSION...Bohlin
AVIATION...Houston
MARINE...Shigesato

Special Weather Statement
National Weather Service Honolulu HI
1147 PM HST Sun Dec 18 2022

HIZ001-003-004-029>031-191115-
Kauai North HI-Kauai East HI-Niihau HI-Kauai Southwest HI-
Kauai South HI-Kauai Mountains HI-
1147 PM HST Sun Dec 18 2022

...Strong thunderstorms will impact portions of Niihau in Kauai and
Kauai in Kauai Counties through 115 AM HST...

At 1147 PM HST, Doppler radar was tracking strong thunderstorms along
a line extending from 20 miles northwest of Polihale to 35 miles west
of Barking Sands. Movement was east at 45 mph.

HAZARD...Wind gusts of 50 to 55 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

These storms will remain over sparsely populated areas of Niihau in
Kauai and Kauai in Kauai Counties, including the following locations:
Puhi...Waimea Canyon State Park...Kaumakani...Kealia...Kalihiwai...
Pakala Village...Hanamaulu...Wailua River State Park and Eleele.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 2215 15930 2197 15933 2188 15943 2189 15961
      2202 15979 2198 16007 2190 16008 2187 16016
      2178 16021 2181 16025 2188 16023 2201 16009
      2202 15999 2214 15974 2222 15959 2224 15940
TIME...MOT...LOC 0947Z 262DEG 41KT 2235 15991 2193 16033

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...55 MPH

Jelsema

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HONOLULU HI
136 AM HST MON DEC 19 2022

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1254 AM     TSTM WND DMG     WAIMEA                  21.96N 159.66W
12/19/2022                   KAUAI              HI   EMERGENCY MNGR

            WIDESPREAD POWER OUTAGES REPORTED.

&&

AG

Special Weather Statement
National Weather Service Honolulu HI
148 AM HST Mon Dec 19 2022

HIZ015-017-018-042>047-049-191300-
South Maui/Upcountry HI-Maui Central Valley South HI-
Windward Haleakala HI-Lanai Mauka HI-Maui Central Valley North HI-
Lanai South HI-Maui Leeward West HI-Lanai Leeward HI-
Lanai Windward HI-Maui Windward West HI-
148 AM HST Mon Dec 19 2022

...Strong thunderstorms will impact portions of Lanai and Maui in
Maui County through 300 AM HST...

At 147 AM HST, Doppler radar was tracking strong thunderstorms along
a line extending from 12 miles northeast of Halawa Valley to 42 miles
southwest of Manele. Movement was east at 20 mph.

HAZARD...Wind gusts of 50 to 55 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Kahului, Kihei, Lahaina, Lanai City, Kapalua, Honokohau, Puunene,
Waikapu, Paia, Wailuku, Waiehu, Maalaea, Waihee, Napili-Honokowai,
Manele, Kaanapali, Haliimaile, Olowalu, Kanaha Beach Park and Honolua
Bay.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 2090 15648 2093 15636 2089 15635 2077 15646
      2080 15648 2078 15654 2088 15670 2083 15680
      2076 15684 2074 15697 2084 15700 2089 15707
      2093 15703 2092 15693 2083 15681 2089 15669
      2101 15666 2104 15660
TIME...MOT...LOC 1147Z 286DEG 17KT 2125 15658 2034 15739

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...55 MPH

Jelsema

Special Weather Statement
National Weather Service Honolulu HI
246 AM HST Mon Dec 19 2022

HIZ023-191345-
Kona HI-
246 AM HST Mon Dec 19 2022

...A strong thunderstorm will impact portions of Hawaii in Hawaii
County through 345 AM HST...

At 245 AM HST, Doppler radar was tracking a strong thunderstorm 14
miles southwest of Captain Cook, or 20 miles south of Kailua-Kona,
moving east at 20 mph.

HAZARD...Wind gusts of 50 to 55 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Captain Cook, Honalo, Kealakekua, Honaunau, Kahaluu-Keauhou, Kainaliu
and Milolii.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 1920 15591 1936 15589 1944 15593 1949 15593
      1949 15595 1958 15598 1960 15597 1960 15583
      1917 15581
TIME...MOT...LOC 1245Z 261DEG 20KT 1936 15610

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...55 MPH

Gibbs

Special Weather Statement
National Weather Service Honolulu HI
258 AM HST Mon Dec 19 2022

HIZ016>018-022-045>050-191430-
South Maui/Upcountry HI-Kipahulu HI-South Haleakala HI-
Maui Central Valley South HI-Haleakala Summit HI-
Windward Haleakala HI-Maui Central Valley North HI-
Maui Leeward West HI-Maui Windward West HI-Kahoolawe HI-
258 AM HST Mon Dec 19 2022

...Strong thunderstorms will impact portions of Kahoolawe and Maui
in Maui County through 430 AM HST...

At 257 AM HST, Doppler radar was tracking strong thunderstorms along
a line extending from 9 miles north of Pauwela to 18 miles south of
Manele. Movement was east at 25 mph.

HAZARD...Wind gusts of 45 to 55 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Kahului, Kihei, Haliimaile, Kipahulu, Keokea, Makawao, Paia, Wailuku,
Wailea, Waihee, Pukalani, Kula, Puunene, Pauwela, Waikapu, Waiehu,
Makena, Kaupo, Maalaea and Haiku-Pauwela.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 2069 15600 2064 15607 2058 15637 2063 15645
      2057 15654 2052 15655 2053 15670 2060 15660
      2059 15652 2065 15645 2079 15647 2081 15660
      2094 15652 2090 15644 2095 15633 2094 15625
      2082 15611 2078 15599
TIME...MOT...LOC 1257Z 270DEG 20KT 2106 15636 2048 15682

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...55 MPH

Jelsema

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HONOLULU HI
340 AM HST MON DEC 19 2022

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0320 AM     NON-TSTM WND DMG WAIMANALO               21.35N 157.73W
12/19/2022                   HONOLULU           HI   EMERGENCY MNGR

            KALANIANAOLE HWY CLOSED BOTH DIRECTIONS
            BETWEEN BELLOWS AND THE ELEMENTARY SCHOOL,
            DUE TO DOWN POWER LINES.

&&

AG