Moderate Cold Wave ● Active
Winter Weather Advisory issued October 20 at 2:48AM AKDT until October 21 at 4:00AM AKDT by NWS Anchorage AK, United States of America
Loading live data… · Marker positions are approximate; severity is labelled in each popup. Sources: USGS, GDACS, NASA EONET, NOAA/NWS, EMSC.
* WHAT...Snow expected. Additional snow accumulations between 10 and
16 inches, mainly near the top of the pass.
* WHERE...Thompson Pass.
* WHEN...Until 4 AM AKDT Wednesday.
* IMPACTS...Travel could be difficult. Be prepared for slippery
roads.
* ADDITIONAL DETAILS...A long duration snowfall event will continue
through tonight. Temperatures at of slightly above freezing will
allow snow to change to rain at times for lower elevations of the
pass. At the top of the pass, snow will be more prolonged but may
also briefly mix with rain at times.
Measurements
| Coordinates | 39.9645, -100.8105 |
|---|---|
| Region | Thompson Pass |
| Location Precision | country |
| Issuing Authority | United States of America — us-noaa-nws-en |
| Cap Urgency | Expected |
| Cap Certainty | Likely |
| Cap Expires | 2026-10-20T16:00:00-08:00 |
Official source
Warnings courtesy of the issuing national meteorological service, via the WMO Alert Hub.
This is an official warning issued by the authority named above. Follow its instructions and those of your local emergency services.
Severity as published by WMO Alert Hub (national weather services).
View original reportAlso reported by: WMO WMO
This event as JSON · API and licence
Source updated 1 hour ago (Oct 20, 2026 10:49 UTC) · we last heard from WMO Alert Hub (national weather services) 47 seconds ago
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About this location
The agency did not publish coordinates for this warning. The pin is the centre of the country, not the location of the event — read the area name, not the map, for where it applies.
Area as the agency stated it: Thompson Pass
Official authorities in United States
If you are there, these are the bodies whose instructions apply. This site is not an emergency service and does not issue warnings.
More for United States →What to do
Follow the instructions issued by WMO Alert Hub (national weather services) and your local emergency services. The guidance below is background.
Hypothermia and frostbite prevention, home heating safety, and surviving being stranded in a vehicle.
Open Severe Cold & Winter Storm Safety →Earlier cold wave events in United States
Severe and extreme events of the same kind, before this one. Listed for scale, not because they are connected to it.
Nearby & related events
Disclaimer: figures are automatic feeds from the named agencies and may be revised. Do not use this page for life-safety decisions — follow official local emergency services.