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Modoc County Alerts
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WARNINGS - WATCHES - ADVISORIES - STATEMENTS
Updates every 15 Minutes
Updated:September 1, 2026 10:30 am PDT

Red Flag Warning RED FLAG WARNING  
Modoc County

Effective: Tue, 9/1 12:43am Severity:  Severe 
Updated: September 1, 2026 10:30 am Urgency: Expected
Expires: Tue, 9/1 11:00pm Certainty: Likely

Areas Affected: Surprise Valley California - Eastern Lassen County - Northern Washoe County
 
Alert Details:
...RED FLAG WARNING IN EFFECT FROM 11 AM TO 11 PM PDT TUESDAY FOR
GUSTY WINDS AND LOW HUMIDITY FOR PORTIONS OF NE CALIFORNIA AND NW
NEVADA...

* CHANGES...None.

* Affected Area...Fire Weather Zone 270 Surprise Valley
California, Fire Weather Zone 278 Eastern Lassen County, Fire
Weather Zone 458 Northern Washoe County, including the S-1
Vya Fire.

* Winds...Southwest 15 to 25 mph with gusts of 30 to 40 mph.
Ridgetop gusts up to 45 mph. Winds shift to westerly in the
late afternoon and evening.

* Humidity...RH reductions to 12 to 17 percent in the
afternoon. Nighttime recoveries of 50 to 80 percent Wednesday
morning.

* Duration...3 to 6 hours.

* Impacts...The combination of gusty winds and low humidity can
cause fire to rapidly grow in size and intensity before first
responders can contain them.

Information:
Avoid outdoor activities that can cause a spark near dry
vegetation, such as yard work, target shooting, or campfires.
Follow local fire restrictions. Check weather.gov/reno for
updates and livingwithfire.info for preparedness tips.
Frost Advisory FROST ADVISORY  
Modoc County

Effective: Tue, 9/1 10:25am Severity: Minor
Updated: September 1, 2026 10:30 am Urgency: Expected
Expires: Tue, 9/1 9:00pm Certainty: Likely

Areas Affected: Modoc County - Klamath Basin - Northern and Eastern Klamath County and Western Lake County - Central and Eastern Lake County
 
Alert Details:
* WHAT...Temperatures between 33 and 36 degrees can result in frost
formation.

* WHERE...In California, Modoc County including the communities of
Alturas, Likely, Canby, and Lookout. In Oregon, parts of Klamath
County including the communities of Crescent, Chemult, Sprague
River, Beatty, Bly, Dairy, Bonanza, and Lorella. Additionally,
parts of Lake County including Fort Rock and across the Christmas
Valley, Silver Lake, and areas just east of Lakeview.

* WHEN...From 4 AM to 8 AM PDT Wednesday.

* IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive
outdoor plants may be killed if left uncovered. Animals who are not
acclimated to colder temperatures may be harmed.

Information:
Take steps now to protect tender plants and sensitive animals from
the cold.