Alaska, 2009

Flood in Alaska, April 28 to 30, 2009

April 28 to 30, 2009 · NWS AFG · 1 event in 1 county or zone

An ice jam developed in the Tanana River about one half mile downstream of the Boondox area during the morning of the 28th. The ice jam caused the Tanana River water to flow overland into Piledriver slough and across Portions of the old Richardson Highway where the water was 3 feet deep in spots and made the highway impassable.

Where it happened

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  • Tropical storms and surge
  • Floods
  • Wind
  • Hail
  • Winter weather
  • Heat and drought
  • Cold
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  • Marine and coastal
  • Other

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The toll

Deaths
0
Injuries
0
Property damage
$500
Crop damage
None recorded
Events
1

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 AFG wrote it up.

An ice jam developed in the Tanana River about one half mile downstream of the Boondox area during the morning of the 28th. The ice jam caused the Tanana River water to flow overland into Piledriver slough and across Portions of the old Richardson Highway where the water was 3 feet deep in spots and made the highway impassable. Private property and some residences were surrounded by water. The flooding was compounded by warm temperatures that caused considerable snowmelt and raised the water levels significantly in the Tanana River. Three to four homes had minor damage at or near the first floor level and a few property owners had minor damage to their access roads; thus a total of $500.00.

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 Fairbanks, AK wrote its last area forecast discussion before the first event at Apr 28, 3:44 AM AKST, 6 hours 46 minutes earlier.

Area forecast discussion, Apr 28, 3:44 AM AKST, 6 hours 46 minutes before
NORTHERN ALASKA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE FAIRBANKS AK
444 AM AKDT TUE APR 28 2009

.DISCUSSION...
THE MODELS ARE IN GOOD AGREEMENT THROUGH FRI. SURFACE HIGH
PRESSURE IN THE GULF OF ALASKA WILL BUILD AND EXPAND NORTH INTO
THE NORTHEAST INTERIOR BY THU MORNING. PRECIPITATION IN THE
WESTERN INTERIOR AND EASTERN BROOKS RANGE WILL RETREAT WEST TO
BEYOND AN AMBLER-GALENA-MCGRATH LINE BY WED. THU AND FRI WILL FIND
PRECIPITATION ONLY ALONG THE WESTERN ALASKA COASTAL REGIONS.

THE ARCTIC COAST WILL SEE DOWNSLOPE FLOW FOR THE NEXT SEVERAL
DAYS. SCATTERED FLURRIES ARE POSSIBLE TODAY ALL ALONG THE COAST
WITH SCATTERED SNOW SHOWERS RETURNING TO THE WESTERN ARCTIC COAST
BY EARLY WED MORNING AND PERSISTING AT LEAST THROUGH THU.

THE WEST COAST WILL SEE SOME DRYING WELL INLAND WHILE THE COASTAL
AREAS WILL CONTINUE WITH RAIN....MIXED WITH SNOW AT TIMES...AND
AREAS OF FOG THROUGH FRI. DENSE FOG EXPECTED IN ZONES 211 213 AND
214 THROUGH THIS AFTERNOON AS WARM AIR MOVES INTO THOSE AREAS.

THE INTERIOR WILL BE DRY AND VERY WARM UNDER STRONG RIDGING WITH
NEAR RECORD TO RECORD BREAKING HIGH TEMPERATURES. SUNNY SKIES AND
A LITTLE HEAT ARE CERTAINLY WELCOMED AFTER THE LONG WINTER BUT
NOT THE RAPID MELT OF SNOW AND THE POSSIBLE HYDRO ISSUES IT MAY
CAUSE.

&&

.FIRE WEATHER...NONE. TOO WET TO BURN...BUT DRYING QUICKLY.

&&

.HYDROLOGY...NONE. RAPID SNOW MELT...ESPECIALLY AT HIGHER
ELEVATIONS...MAY BE A CONCERN BY THIS WEEKEND.

&&

.AFG WATCHES/WARNINGS/ADVISORIES...
BRISK WIND ADVISORY FOR PKZ200-PKZ210-PKZ215-PKZ220-PKZ225.
&&

RL APR 09

The radar

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

Open the radar archive at this moment

Event by event

1 flood. Local standard time, as filed.

Flood, Middle Tanana Valley

When
April 28, 10:30 AM AKST to April 30, 1:30 PM AKST
Where
Middle Tanana Valley County, 8.16 mi S of Eielson Afb to 5.23 mi SSE of North Pole
Cause
Ice Jam
Property damage
$500
Reported by
NWS Storm Survey
Coordinates
64.552, -147.089

What these are

Flood
Flooding that develops more slowly than a flash flood: rivers leaving their banks, or water standing over land for an extended time.

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

The same day elsewhere

More

Every storm in Alaska in 2009Every state in 2009This day in weather historyWarnings in Alaska, April 2009

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: 158389.