Alaska, 2023

Blizzard and Winter Storm in Alaska, March 1 to 2, 2023

March 1 to 2, 2023 · NWS AJK · 16 events in 15 counties and zones

A strong low pressure developed over the northern Gulf of Alaska bringing significant moisture to Southeast Alaska. Cold air entrenched over the region at low levels ahead of the event allowed for significant snow to fall across the area in two major pulses.

Where it happened

Every event with a place to put it; 16 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.

  • Tornadoes
  • Tropical storms and surge
  • Floods
  • Wind
  • Hail
  • Winter weather
  • Heat and drought
  • Cold
  • Fire, smoke and dust
  • Marine and coastal
  • Other

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The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
16

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 strong low pressure developed over the northern Gulf of Alaska bringing significant moisture to Southeast Alaska. Cold air entrenched over the region at low levels ahead of the event allowed for significant snow to fall across the area in two major pulses. The first being along the warm front, with a period of blizzard conditions over Juneau, and the second pulse occurred as the cold front moved across the region.

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 Feb 28, 2:55 PM AKST, 9 hours 5 minutes earlier.

Area forecast discussion, Feb 28, 2:55 PM AKST, 9 hours 5 minutes before
Southeast Alaska Forecast Discussion
National Weather Service Juneau AK
255 PM AKST Tue Feb 28 2023

.SHORT TERM.../Through Wednesday night/ Significant winter storm
expected to impact just about all of the panhandle during the
short range period as a rapidly intensifying low moves into the
northern gulf tonight into Wed. Winter weather headlines are up
for all of the panhandle with warnings for the NE gulf coast,
northern panhandle, and central inner channels, and advisories for
the southern inner channels and E gulf coast. In addition,
widespread 25 to 30 kt winds in the inner channels, and gale
force (and even storm force) winds, and seas reaching 30 kt for
the gulf are expected with this system.

For the snow, cold air is entrenched in the panhandle right now
which will be overrun by the warmer moist air from the S and SW
tonight and Wed. This precip will come in two pulses. The first
will arrive late tonight as a warm frontal feature, while the
second will be the trailing cold front expected Wed afternoon.
Most areas in the northern half of the panhandle are expected to
remain snow for most of the event and will receive the higher snow
accumulations due to the cold air in place (upwards of 8 to 15
inches). The southern half has the possibility of enough
southerly flow at low levels ahead of the cold front that rain
will start to mix in with the snow which will limit snow totals.
Currently the greatest uncertainly lies from Angoon and Sitka
southward particularly around Angoon, Petersburg, Kake, and
Wrangell. In these areas, southerly flow will try and warm
temperatures up, but snow melt cooling and just the higher precip
rates may keep temperatures cool enough for snow to continue
falling. Decided to error on the side of caution since dew points
are still expected to be rather low which would favor the cooler
and more snow scenario. The precip is expected to switch from
heavy stratiform precip to more convective post front late Wed
night.

As for the marine areas, Winds are expected to increase through
the night with widespread gales and even storm force winds in the
gulf by morning. A second area of storm force winds is expected to
develop over the central gulf Wed afternoon on the south side of
the strong low. It is this second area of storm force winds that
will kick up the seas up to 30 ft across the gulf wed afternoon
and night. This is mainly due to the westerly direction these
winds are coming from which will have a long fetch to build up
seas. Inner channels will mainly see 25 to 30 kt winds Wed with
mainly Clarence and southern Chatham seeing gale force winds.
Winds generally will remain high across the board into Wed night
as strong W onshore flow takes over.

.LONG TERM.../Wednesday Night through Sunday/ A rapidly developing
low in the Gulf of Alaska is expected impact the region with the
heaviest snow accumulation expected Wednesday morning and through
the afternoon. Gale force winds will accompany the front
extending from this feature as it impacts the panhandle early
Wednesday with some areas experiencing storm force winds along the
outer coast as the front approaches. Winds in the inner channels
will also increase to upwards of 25 knots before subsiding through
Thursday night. Winds in the gulf are expected to reach storm
force Wednesday night before beginning to slacken as the low
stalls and progressively weakens over the northern gulf.
By Wednesday night, the heaviest of precipitation is expected to
be over with mostly trailing showers and persistent onshore flow
as the low remains in the northern gulf. Thursday and Friday, most
of the panhandle is expected to see continuing diminishing
showers, shifting to all snow for the southern half of the
panhandle as temperatures continue to drop heading into the
weekend.

Both deterministic and model guidance continue to suggest the low
departing the gulf to the south on Friday, with high pressure
building over the Yukon Territory. Thus the panhandle will once
again be shifting into a northerly outflow pattern with winds in
Lynn Canal reaching gale force Friday night into Saturday. The
gradient associated with this high pressure may shift to be
oriented more East/West, thus leading to winds in the northern
inner channels slackening early next week, but still maintaining
overall outflow.

&&

.AVIATION...VFR conditions with good conditions for most of the
panhandle to start out this TAF issuance followed by worsening
conditions tonight as a strong low moves into the gulf. Already,
multiple pireps from all areas are reporting turbulent conditions. Expect
to see the front move along the panhandle from north to south
with dropping conditions as it moves. Across the panhandle,
widespread IFR and LIFR VIS conditions from widespread heavy
snowfall rates. Along with the low VIS, increased LLWS along and
behind the front is expected, with wind speeds approaching 45 kts
in some areas.

&&

.AJK WATCHES/WARNINGS/ADVISORIES...
PUBLIC...Winter Storm Warning from 6 PM this evening to noon AKST
     Wednesday for AKZ317.
     Strong Wind Wednesday morning for AKZ317.
     Winter Storm Warning from midnight tonight to midnight AKST
     Wednesday night for AKZ318>322-325.
     Winter Weather Advisory from midnight tonight to noon AKST
     Wednesday for AKZ323-328.
     Strong Wind Wednesday afternoon for AKZ323.
     Winter Storm Warning from midnight tonight to 6 PM AKST
     Wednesday for AKZ324-326-327-329.
     Winter Weather Advisory from 3 AM to noon AKST Wednesday for
     AKZ330-332.
     Strong Wind Wednesday afternoon for AKZ330-332.
     Winter Storm Warning from 3 AM Wednesday to midnight AKST
     Wednesday night for AKZ331.
MARINE...Storm Warning for PKZ051-052.
     Gale Warning for PKZ012-035-036-041>043.
     Small Craft Advisory for PKZ011-013-021-022-031>034-053.

&&

SHORT TERM...EAL
LONG TERM....STJ
AVIATION...NC

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The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

12 winter storm, 3 heavy snow, 1 blizzard. Local standard time, as filed.

Heavy Snow, City and Borough of Yakutat

When
March 1, 12:00 AM AKST to March 2, 4:02 AM AKST
Where
City and Borough of Yakutat forecast zone
Reported by
NWS Employee
Coordinates
59.667, -139.133 (the zone’s center; the record gives no point)

Snow began in Yakutat in the afternoon of February 28th and continued to fall for the next two days. Around 8am on the 1st, WSO Yakutat estimated 6 to 8 inches of snow had fallen while a retired NWS employee nearby measured 9 inches and was a quarter mile visibility at the time. By 11am another 8 inches had fallen. The quarter mile visibility lasted from 544am to 136pm on the 1st, with winds of 15 to 20 mph. The storm total by 446pm had reached 22 inches, but post frontal snow showers continued through the following morning with around 7 inches of additional accumulation.

Winter Storm, Municipality of Skagway

When
March 1, 12:00 AM AKST to March 2, 12:00 AM AKST
Where
Municipality of Skagway forecast zone
Reported by
Department of Highways
Coordinates
59.469, -135.306 (the zone’s center; the record gives no point)

Snow began in Skagway around 7pm on February 28th and by 545am the next morning a report came in with about 6 inches in town and a strong south wind. The Klondike Highway report mentioned a minimum of 5 inches near the border with blowing and drifting snow. The highway was closed for a few hours that morning due to avalanche conditions on the Canadian side. The storm total in town was 10 inches as measured at the COOP station on the morning of the 2nd after snow had ended.

Winter Storm, Haines Borough and Klukwan

When
March 1, 12:00 AM AKST to March 2, 6:45 AM AKST
Where
Haines Borough and Klukwan forecast zone
Reported by
Department of Highways
Coordinates
59.251, -135.501 (the zone’s center; the record gives no point)

Haines DOT estimated 6 to 8 inches of snow and blowing snow by early morning on the 1st and multiple spotters in town measured over 8 inches by 8am. Visibility at the Haines airport fell to a quarter mile at 734am and stayed that low until 357pm. Haines school district had an early dismissal with all afternoon activities cancelled. By late afternoon reports were up to 2 feet of snow in town. Strong wind and snow continued through the morning of the 2nd with gusts of 30 to 40mph and storm totals of 26 to 35 inches in town and 15.8 inches measured at the border.

Winter Storm, Glacier Bay

When
March 1, 12:00 AM AKST to 4:15 PM AKST
Where
Glacier Bay forecast zone
Reported by
Department of Highways
Coordinates
57.948, -134.941 (the zone’s center; the record gives no point)

Dry snow began late evening on February 28th and became heavy overnight. Gustavus DOT measured 5 inches by early morning on the 1st, then reported another 9 inches by 1134am. Winds were gusting 20 to 30 mph throughout the morning and peaked at 39mph in the afternoon. The storm total snowfall reached 18 inches before changing to rain in the afternoon.

Winter Storm, Eastern Chichagof Island

When
March 1, 12:00 AM AKST to 2:45 PM AKST
Where
Eastern Chichagof Island forecast zone
Reported by
COOP Observer
Coordinates
57.948, -134.941 (the zone’s center; the record gives no point)

Dry snow began late evening on February 28th and became heavy the following morning. Winds were gusting around 20mph through the morning with visibility down to a quarter mile at times. Some mixing with rain began in the afternoon, but periods of snow continued through the next morning. The Hoonah COOP measured 3.6 inches by 730am on the 1st and another 10.5 the next morning for a storm total of 14.1 inches.

Winter Storm, Cape Fairweather to Lisianski Strait

When
March 1, 12:00 AM AKST to 2:45 PM AKST
Where
Cape Fairweather to Lisianski Strait forecast zone
Reported by
COOP Observer
Coordinates
57.948, -134.941 (the zone’s center; the record gives no point)

Snow began late evening on February 28th and became heavy through the following morning. Winds were gusting around 30mph through the morning. Some mixing with rain and ice pellets began in the afternoon. The Pelican COOP measured 6.7 inches by 8am on the 1st and another 13.4 the next morning for a storm total of 20.1 inches.

Heavy Snow, Admiralty Island

When
March 1, 12:00 AM AKST to 3:45 PM AKST
Where
Admiralty Island forecast zone
Reported by
Public
Coordinates
57.948, -134.941 (the zone’s center; the record gives no point)

Snow began late evening on February 28th and continued through the following morning. A change to rain happened in the afternoon of the 1st. An estimated storm total of 10 inches was given by an Angoon School District employee.

Winter Storm, City and Borough of Juneau

When
March 1, 12:00 AM AKST to 9:21 AM AKST
Where
City and Borough of Juneau forecast zone
Reported by
NWS Employee
Coordinates
58.417, -134.333 (the zone’s center; the record gives no point)

Snow began late on February 28th and continued to fall through the following afternoon. By morning, over 6 inches were measured by multiple people across town. By 1045am over 11 inches was reported via social media on Douglas. Blowing and drifting snow was also reported by multiple spotters. After 921am, blizzard conditions were occurring.

Winter Storm, Petersburg Borough

When
March 1, 12:00 AM AKST to 3:42 PM AKST
Where
Petersburg Borough forecast zone
Reported by
COOP Observer
Coordinates
56.765, -133.193 (the zone’s center; the record gives no point)

Snow began late on February 28th and became heavy through the following morning with periodic gusts of around 25mph. A change to rain happened in the afternoon. The COOP station at the Petersburg airport measured 6 inches by 1248pm with rates of 1 to 2 inches per hour and significant settling. A storm total of 9 inches was measured at their official measurement time of 9pm that night.

Heavy Snow, Western Kupreanof Island and Kuiu Island

When
March 1, 12:00 AM AKST to 1:26 PM AKST
Where
Western Kupreanof Island and Kuiu Island forecast zone
Reported by
Trained Spotter
Coordinates
55.597, -132.803 (the zone’s center; the record gives no point)

Trained spotter in Security Bay, 17 miles W of Kake, measured 8.5 inches of snow by 1038am on the 1st. A change to rain occurred after this time.

Winter Storm, City and Borough of Wrangell

When
March 1, 12:00 AM AKST to 10:56 AM AKST
Where
City and Borough of Wrangell forecast zone
Reported by
Trained Spotter
Coordinates
56.413, -132.320 (the zone’s center; the record gives no point)

Snow began late on February 28th and became heavy through the following morning with periodic gusts of around 30mph. A change to rain happened in the late morning. A trained spotter south of Wrangell measured 6 inches of dense snow.

Winter Storm, Prince of Wales Island

When
March 1, 12:00 AM AKST to 10:56 AM AKST
Where
Prince of Wales Island forecast zone
Reported by
Trained Spotter
Coordinates
55.597, -132.803 (the zone’s center; the record gives no point)

Snow began late on February 28th and became heavy through the following morning with periodic gusts of around 30mph and a peak of 52mph at Hydaburg. A change to rain happened in the late morning. A trained spotter in Craig measured 5 inches of snow, blizzard like conditions and a power outage at 545am. A CoCoRaHS observer in Edna Bay measured 12 inches of snow by 7am. Thorne Bay COOP on the east side of the island measured 4 inches from this event.

Winter Storm, Ketchikan Gateway Borough

When
March 1, 12:00 AM AKST to 10:00 AM AKST
Where
Ketchikan Gateway Borough forecast zone
Reported by
Trained Spotter
Coordinates
55.501, -131.417 (the zone’s center; the record gives no point)

Snow began late on February 28th and became heavy through the following morning with periodic gusts of around 35 to 50mph. A trained spotter in Ketchikan measured 9 inches of snow at 830am, but drifting made it difficult to measure. The COOP on the north side of town measured 8 inches from this event and noted a change to rain at 10am. At 703am the City of Ketchikan delayed opening for 2 hours.

Winter Storm, Annette Island

When
March 1, 12:00 AM AKST to 10:00 AM AKST
Where
Annette Island forecast zone
Reported by
NWS Employee
Coordinates
55.597, -132.803 (the zone’s center; the record gives no point)

Snow began late on February 28th and became heavy through the following morning with periodic gusts of around 35 to 45mph. An NWS Employee measured 4.3 inches of snow and a power outage at 7am. The COOP in Metlakatla measured 2.1 inches of snow at 1148am, but noted that there was a large amount of snow overnight that had transitioned into rain with high winds. The COOP also noted the power outage.

Winter Storm, City of Hyder

When
March 1, 12:00 AM AKST to 11:00 PM AKST
Where
City of Hyder forecast zone
Reported by
COOP Observer
Coordinates
55.597, -132.803 (the zone’s center; the record gives no point)

Snow began late on February 28th and became heavy through the following morning and continued for approximately 24 hours. The COOP in Hyder measured 2.8 inches of snow by 4am and noted rates of 2 inches per hours shortly after. The nearby town of Stewart B.C. recorded heavy ice pellets at 921am and snow continuing through 11pm.

Blizzard, City and Borough of Juneau

When
March 1, 9:21 AM AKST to 1:50 PM AKST
Where
City and Borough of Juneau forecast zone
Reported by
ASOS
Coordinates
58.417, -134.333 (the zone’s center; the record gives no point)

The ASOS at the Juneau airport had continuous visibility of one quarter mile or less between 9am and 1pm with winds gusting between 36-56mph. Whiteout conditions were reported on Egan Drive, the main highway in town, and the city closed multiple activities including a school early dismissal. Storm total snowfall from this event ranged from 6 to 12 inches before changing to rain in the afternoon.

What these are

Heavy Snow
Snowfall reaching the local warning threshold without the other hazards of a winter storm.
Winter Storm
A storm that brought snow, sleet or freezing rain at warning levels, usually over several hours or days.
Blizzard
Sustained winds or frequent gusts of 35 mph or more with falling or blowing snow that cuts visibility below a quarter mile for three hours or longer.

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

The same day elsewhere

More

Every storm in Alaska in 2023Every state in 2023This day in weather historyWarnings in Alaska, March 2023

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: 1082359, 1082361, 1082362, 1082363, 1082364, 1082365, 1082366, 1082369, 1082375, 1082376, 1082521, 1082522, 1082523, 1082524, 1082525, 1082367.