Heavy Rainfall Across the Southwest, Mid-Atlantic and Florida; Fire Weather Concerns in the Northwest and Alaska

Heavy to excessive rainfall may bring flooding to parts of Arizona, New Mexico, Florida, North Carolina, and Virginia today. Recently burned areas will be particularly vulnerable to flash flooding. Gusty winds and low humidity will bring elevated to critical fire weather conditions to parts of the Northwest U.S. and central Alaska today. Read More >

Smoke dispersal is categorized by using the Ventilation Rate. Ventilation Rate forecasts for a specific point can be found using the Fire Weather Dashboard. Click a spot on the map and scroll down to find daily and hourly Ventilation Rate values for the next few days.

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

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

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Heavy Rainfall Across the Southwest, Mid-Atlantic and Florida; Fire Weather Concerns in the Northwest and Alaska

Colorado and Utah Smoke Dispersal and Ventilation Rates

Fire Weather Dashboard