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Flood Watch

Active

Central Beaufort Sea Coast; Eastern Beaufort Sea Coast; Western Arctic Plains; Howard Pass and the Delong Mountains; Central Arctic Plains

Status In Progress Started about 4 hours ago
Ends
Issued
Severity Severe
Urgency Future
Certainty Possible

Details

* WHAT...Flooding caused by rain and snowmelt continues to be possible.
* WHERE...Dalton Highway, Sag, Colville, Kuparuk Rivers and their tributaries.
* WHEN...Through Wednesday morning.
* IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Access to roads, airstrips, and low-lying infrastructure may be affected. High flows could lead to bank erosion that could threaten nearby roads.
* ADDITIONAL DETAILS... - Temperatures in the Brooks Range will be warming into the 60s and low 70s for highs and staying above freezing with low temperatures in the upper 30s to mid 40s over the next several days. The Arctic Plain and Coast will have temperatures ranging from about 45F to 70F with lows in the mid 30s to mid 40s.
Rain is expected through Tuesday night/Wednesday morning across a wide swath of the Brooks Range and North Slope. Rainfall totals as of 2:00pm AKDT June 15th are around 0.20 to 0.50" in the Central Brooks Range with lighter amounts towards the Arctic Coast. Rainfall totals will be around 1.5 inches in the Brooks Range with 0.5 to 1.0 on the Plains and Coast.
We are already beginning to see small rises on the Middle Fork of the Koyukuk, Koyukuk at Bettles, Slate Creek and Atigun River below Galbraith Lake. We will likely continue to see rises through Tuesday as the rain and snowmelt persists.
Most of the ice on the larger rivers has already moved out which leaves more room to accommodate the snowmelt and rainfall. This contrasts with last year's late breakup when the snowmelt all entered the river systems while ice was mainly still in place.
- Http://www.weather.gov/aprfc
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