All Weather News

Critical Fire Weather Conditions for Montana and Wyoming

19 Oct 2017, 11:48 am

Very warm and dry weather is in the forecast for the High Plains Thursday and early Friday.  Low humidity values and breezy winds out of the southwest will combine to create critical fire weather conditions across Wyoming and Montana.

Parts of Montana and Wyoming are under a “Critical” fire weather risk for most of Thursday and early Friday morning.  Here is a look at the requirements for a “Critical” fire risk from the Storm Prediction Center.

Critical for temperature, wind, and relative humidity:
– Sustained winds 20 mph or greater (15 mph Florida)
– Minimum relative humidity at or below regional thresholds
– Temperatures above 50-60° F, depending on the season
– Dry fuels
– Duration of 3 hours or more

Red flag warnings have been issued for northeast Wyoming and north-central Montana.  Notice how these warnings line up with the areas under the “Critical” fire risk.  Red flag warnings means critical fire conditions are occurring or will occur shortly.  This is all caused by the warm temperatures, low humidity and strong winds.

Here are some tips for wildfire prevention.



The extended forecast is showing some improving fire weather conditions with some much cooler air moving into Montana and Wyoming.



Meteorologist Patrick Crawford




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