Alaska, 2019

High Wind in Alaska, April 21 to 22, 2019

April 21 to 22, 2019 · NWS AJK · 6 events in 6 counties and zones

A Deepening storm center tracked into the Eastern Gulf on Sunday evening 4/21 then stalled in the NE Gulf through Mon morning. High winds reached the SW coast of Prince of Wales by midnight then Ketchikan and Edna Bay through early Monday morning.

The toll

Deaths
0
Injuries
0
Property damage
$4,000
Crop damage
None recorded
Events
6

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What happened

The episode as NWS AJK wrote it up.

A Deepening storm center tracked into the Eastern Gulf on Sunday evening 4/21 then stalled in the NE Gulf through Mon morning. High winds reached the SW coast of Prince of Wales by midnight then Ketchikan and Edna Bay through early Monday morning. The high winds will continued to move northward through the day as the strong low level jet 70 KT moved north. High pressure building in after the system made the winds persist into Tuesday for the inner channels with a large swell moving onto the outer coast.

What forecasters said that day

The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Juneau, AK wrote its last area forecast discussion before the first event at Apr 21, 1:42 PM AKST, 7 hours 18 minutes earlier.

Area forecast discussion, Apr 21, 1:42 PM AKST, 7 hours 18 minutes before
Southeast Alaska Forecast Discussion
National Weather Service Juneau AK
242 PM AKDT Sun Apr 21 2019

.SYNOPSIS...One front attempting to exit the panhandle this
evening with front a little slow to spread east over the coast
mountains. A quick moving strongly developing wave in the
northeast Pacific that is beginning to curve north into the
Eastern Gulf of Alaska.

&&

.SHORT TERM...The first front will get pushed through the area by
Monday morning. The gusty winds from the first front have
essentially lessened with only gusts to 40 mph in the far southern
panhandle. The next low is rapidly deepening to a depth of 980 mb
by Monday morning west of the Cape Suckling then the low will
reform inland in southern Yukon Territory. Assisting the low and
frontal strength is strong low level jet of 60 to 70 kt flowing
across the panhandle to the northeast gulf as the low tracks
northward.

The new front will start to impact the southern
panhandle Sunday evening around 10 pm increasing wind gusts to 60
mph or higher prompting the high wind warning that has been
issued. The warnings fill in going north through the panhandle to
be over the northern sections in the morning with the Lynn Canal
area lingering into the afternoon timeframe. The gusts to 60 mph
plus will extend through the rest of the panhandle. The strong
gusty winds should last 3 to 6 hours as they go northward. The
strength and position of the low is forming sort of a double dose
of wind. After the front with east to southeast winds go past a
strong burst of southwest winds will moving into the coastal
regions off the gulf of Alaska This is where some of the strong
winds are coming from for the coastal zones.

Behind the monday front a secondary trough just ahead of cold pool
aloft sweeps in with a band of organize showers.  Some of the
showers could be enhance so the shower could be heavy. Also near the
front edge of the colder air pool there may be sufficient mid level
lift to spawn an isolated Thunderstorms. Have kept the location of
them in the northern gulf coastal waters to the northern offshore
area. The heavier shower activity will likely move through the
southern panhandle on Tuesday, leaving a westerly onshore flow
pattern across the gulf and into the panhandle.

As if the wind, heavy showers, and thunder potential was not enough
the cold pool moving across the gulf will cooling temperatures and
lowering snow levels.  The Yakutat area could potentially see
accumulations Monday night in a mix or straight snow shower
event. The mix/snow will move across the northern panhandle
Tuesday/Tuesday evening. Snowfall looks to limited to the northern
third of the panhandle although could stretch down in a mix to
the northern half of the central panhandle.

.LONG TERM.../Tuesday through Sunday/ As of 10 pm Saturday. Upper
level trough over Western Alaska that has been feeding storms into
the panhandle is finally showing signs of breaking down mid to
late week. It starts with an arctic high digging into the northern
part of the trough eventually cutting it off into an upper low.
Said low then drifts E across the gulf late week, ending up over
BC by next Sunday. Though how fast it does this has not been pined
down yet. Forecast confidence is moderate through the long range
as there are several weak short waves mixed into this pattern that
are complicating the forecast. Favored WPC for any needed updates
today.

At the surface, several short waves are moving through the area
through late week, but none are anywhere near as strong as the Sun
and Mon systems. The only short wave of note is at the beginning
of the long range on Tue that will be bringing more showers and
some gusty winds to the area. Nothing significant, mostly 20 to
30 kt winds for most areas and more organized showers but these
should be brief lasting only through about mid day Tue. Rest of
the long range features continued damp conditions as more weak
waves move through. The panhandle shows signs of beginning to dry
out by next weekend from NW to SE as the upper low moves out.

Another concern for the long range is the cooler air mass that
will be moving through Tue into Fri with the coolest conditions
expected for Tue and Wed. 850 mb temps forecast to drop down into
the -7 to -8C range at that time. Snow levels will likely lower
to a few hundred feet across the area. Some areas in the north
(like Yakutat, Haines, Gustavus, Hoonah, Skagway, and Juneau) may
see their rain showers change over to a mix or all snow,
particularly at night. No significant accumulations are expected
at this time, but an inch or two here and there is not out of the
questions.

&&

.AVIATION...Fairly widespread ceilings under 3000 feet Sunday
evening with locally gusty winds in the southern panhandle early
with some turbulence and local wind shear. As the next system
spreads north tonight and into the northern panhandle Monday
morning. Rain will lower ceilings and reduce visibility so IFR
condition will increase overnight to early Tuesday. Along with the
rain, strong winds, wind shear, and moderate to severe turbulence
near airports, except Yakutat will have lighter winds and less
shear. Later in the afternoon after the low moves north and jumps
inland, a hard shift in winds to Southwest will impact outer
coastal airports.

&&

.MARINE...Gale to Storm force winds Sunday night into Monday with
the strong developing system. The eastern gulf may see a small
pocket of gale force winds in the northeast gulf late Monday to
early Tuesday ahead of the trough with the band of semi organized
showers.

&&

.HYDROLOGY...Incoming rain fall will raise stream and river levels
but is not expected to threaten any flooding issues.

&&

.AJK Watches/Warnings/Advisories...
PUBLIC...High Wind Warning from 1 AM to 7 AM AKDT Monday for AKZ026.
     High Wind Warning from 10 PM this evening to 7 AM AKDT Monday
     for AKZ027-028.
     High Wind Warning from 4 AM to 10 AM AKDT Monday for AKZ024.
     High Wind Warning from 7 AM to 1 PM AKDT Monday for AKZ021-025.
     High Wind Warning from 10 AM to 4 PM AKDT Monday for AKZ020-022.
     High Wind Warning from 8 AM to 2 PM AKDT Monday for AKZ023.
     High Wind Warning from 11 AM to 7 PM AKDT Monday for AKZ018-019.
MARINE...Storm Warning for PKZ012-013-021-022-036-042-043.
     Gale Warning for PKZ011-031>035-041-051>053.

&&

Bezenek/EAL

Visit us at http://www.weather.gov/Juneau

Event by event

6 high wind. Local standard time, as filed.

High Wind, Southern Inner Channels

When
April 21, 9:00 PM AKST to April 22, 6:00 AM AKST
Where
Southern Inner Channels forecast zone
Measured
65 kt (75 mph) measured gust
Property damage
$2,000
Reported by
Official NWS Observations

Gusts 60 to 75 mph were observed in Downtown Ketchikan overnight on 4/21 to 4/22. No damage was reported.

High Wind, Eastern Chichagof Island

When
April 22, 6:00 AM AKST to 12:00 PM AKST
Where
Eastern Chichagof Island forecast zone
Measured
54 kt (62 mph) measured gust
Reported by
Official NWS Observations

Gusts to 60 MPH occurred during the morning of 4/22 in Tenakee Springs. No damage was reported.

High Wind, Salisbury Sound to Cape Fairweather Coastal Area

When
April 22, 9:00 AM AKST to 3:00 PM AKST
Where
Salisbury Sound to Cape Fairweather Coastal Area forecast zone
Measured
65 kt (75 mph) measured gust
Reported by
Official NWS Observations

Gusts to 75 MPH occurred during the late morning at Cape Spencer on 4/22. No damage was reported.

High Wind, Juneau Borough and Northern Admiralty Island

When
April 22, 9:00 AM AKST to 12:00 PM AKST
Where
Juneau Borough and Northern Admiralty Island forecast zone
Measured
52 kt (60 mph) estimated gust
Property damage
$2,000
Reported by
Trained Spotter

Gusts to 60 MPH occurred during the early afternoon of 4/22 in Auke Bay. Damage was reported to the Allen Marine Dock and a window was broken on Shelter Island. Wind waves in Auke Bay caused dock problems.

High Wind, Taiya Inlet and Klondike Highway

When
April 22, 10:00 AM AKST to 6:00 PM AKST
Where
Taiya Inlet and Klondike Highway forecast zone
Measured
52 kt (60 mph) estimated gust
Reported by
Unknown

Gusts to 60 MPH occurred during the afternoon of 4/22. No damage was reported.

High Wind, Haines Borough and Lynn Canal

When
April 22, 10:00 AM AKST to 6:00 PM AKST
Where
Haines Borough and Lynn Canal forecast zone
Measured
52 kt (60 mph) measured gust
Reported by
Official NWS Observations

Gusts to 60 MPH occurred during the afternoon of 4/22 in Haines Harbor. No damage was reported.

What these are

High Wind
Sustained non-thunderstorm winds of 40 mph or more for an hour, or gusts of 58 mph or more.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in Alaska in 2019Every state in 2019This day in weather historyWarnings in Alaska, April 2019

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 818432, 818425, 818426, 818429, 818420, 818421.