Cold/Wind Chill, Koyukuk-Upper Kobuk Valleys
- When
- January 29, 12:00 AM AST to January 31, 11:59 PM AST
- Where
- Koyukuk-Upper Kobuk Valleys forecast zone
- Reported by
- OFFICIAL NWS OBS.
While northern Alaska was under a relatively cold airmass already, a large pool of colder air moved from the Russian high Arctic Ocean to the Chukchi Sea coast west of Barrow on Jan. 29th and proceeded southeast to the interior of Alaska through the 31st, where it remained until being slowly warmed February 10-12th.
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.
The episode as NWS AFG wrote it up.
While northern Alaska was under a relatively cold airmass already, a large pool of colder air moved from the Russian high Arctic Ocean to the Chukchi Sea coast west of Barrow on Jan. 29th and proceeded southeast to the interior of Alaska through the 31st, where it remained until being slowly warmed February 10-12th. Many locations over Zones 4 and 8 (Western Interior) and western zones 5 and 7 (Central Interior) remained in the 50s below during the period and reached the 60s below one or more times. The lowest recorded temperatures and dates are:Zone 4: Huslia: -67 31st , Coldfoot DOT: -58 29th Zone 5: Chandalar Lake -74 29th, Stevens Village: -54 29th and 30th, Eagle: -55 1/30Zone 7: Delta Dairyaire: -60 30th, Zone 8: Galena: -64 31st, Grayling: -58 31st, Unofficial: Kaiyuh (20E Kaltag) -69 31stNo deaths or known injuries, however, much disruption of commercial air service to villages as piston engine craft could not fly at temperatures continuously below -40. Reports of some frozen sewer and water mains in a few villages. Overall financial impact of event is unknown. Event continued in February.
4 cold/wind chill. Local standard time, as filed.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Alaska in 1999Every state in 1999This day in weather historyWarnings in Alaska, January 1999
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: 5681518, 5681519, 5681520, 5681521.