Colorado and Utah Smoke Dispersal and Ventilation Rates

Dangerous Cold Weather for Most of the Country; Rare Winter Storm for the South; Fire Weather Concerns for Southern California

Arctic air will filter south and east through early this week. As this cold air moves across the South, a rare winter storm is forecast to develop from Texas, Gulf Coast States into the Southeast through early this week. Several new daily record low temperatures are expected, including new record-low maximum temperatures. For Southern California, fire weather concerns increase this week. Read More >

Fire Weather Dashboard

The link above is configured to display smoke dispersal categories as shown here:

	Smoke Dispersal	Vent. Rate, knot-feet (x1000)
	Excellent	150 or greater
	Very Good	100 to 149.99
	Good	60 to 99.99
	Fair	40 to 59.99
	Poor	less than 40

Smoke Dispersal

Vent. Rate, knot-feet (x1000)

Excellent

150 or greater

Very Good

100 to 149.99

Good

60 to 99.99

Fair

40 to 59.99

Poor

less than 40

Ventilation Rate = Transport Wind (kts) x Mixing Height (ft)