Severe Cold Wave ● Closed

Freeze Warning issued September 8 at 11:34AM MDT until September 9 at 9:00AM MDT by NWS Riverton WY, United States of America

Event time: Sep 8, 2026 17:34 UTC Last updated: Sep 17, 2026 United States

Icon = what happened · ring colour = how serious: Extreme Severe Moderate Minor

Loading live data… · Marker positions are approximate; severity is labelled in each popup. Sources: USGS, GDACS, NASA EONET, NOAA/NWS, EMSC.

* WHAT...Sub-freezing temperatures 26 to 32 degrees expected.
Isolated cold prone areas 22 to 25 degrees.

* WHERE...Jackson Hole, South Lincoln, Star Valley, Upper Green River
Basin, and Upper Green River Basin Foothills Counties.

* WHEN...From 2 AM to 9 AM MDT Wednesday.

* IMPACTS...Frost and freeze conditions could kill crops, other
sensitive vegetation and possibly damage unprotected outdoor
plumbing.

Measurements

Coordinates	39.9645, -100.8105
Region	Jackson Hole; Star Valley; Upper Green River Basin Foothills; Upper Green River Basin; South Lincoln County
Location Precision	country
Issuing Authority	United States of America — us-noaa-nws-en
Cap Urgency	Expected
Cap Certainty	Likely
Cap Expires	2026-09-09T09:00:00-06:00

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 report

This event as JSON · API and licence

Source updated 41 days ago (Sep 8, 2026 17:36 UTC) · we last heard from WMO Alert Hub (national weather services) 29 seconds ago

On a slow connection? Low-bandwidth version — no map, no scripts, under 14 KB.

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: Jackson Hole; Star Valley; Upper Green River Basin Foothills; Upper Green River Basin; South Lincoln County

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 →

Nearby & related events

Wind Advisory issued October 19 at 1:35PM AKDT until October 20 at 10:00PM AKDT by NWS Juneau AK, United States of America Moderate Severe Storm United States active via WMO 28 min ago Wind Advisory issued October 19 at 1:35PM AKDT until October 21 at 4:00PM AKDT by NWS Juneau AK, United States of America Moderate Severe Storm United States active via WMO 28 min ago Wind Advisory issued October 19 at 1:35PM AKDT until October 21 at 4:00AM AKDT by NWS Juneau AK, United States of America Moderate Severe Storm United States active via WMO 28 min ago Winter Weather Advisory issued October 19 at 1:34PM AKDT until October 21 at 4:00AM AKDT by NWS Anchorage AK, United States of America Moderate Cold Wave United States active via WMO 29 min ago Winter Weather Advisory issued October 19 at 1:34PM AKDT until October 20 at 10:00PM AKDT by NWS Anchorage AK, United States of America Moderate Cold Wave United States active via WMO 29 min ago

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.