What makes Platte Canyon Fire Protection District go into a Burn Ban? A red flag warning! Below is the National Weather Service’s definition of a red flag warning and what the weather must be like to have a red flag warning. Red Flag WarningDefinition: Informs land management agencies of the imminent or actual occurrence of Red Flag conditions. A Red Flag Warning will be issued when there is high confidence that Red Flag criteria will be met within the next 24 to 48 hours, or when those criteria are already being met or exceeded. A warning may be issued for all, or portions of a fire weather zone or region (Platte Canyon Fire District is in zone 216). Zones impacted by the event will be listed within the Red Flag Warning product.
Criteria: A combination of weather and fuels conditions (as determined by fire management) for any 3 hours or more in a 12-hour period. These criteria for the forecast area of the Denver/Boulder NWS office are defined as the following: 1. Frequent gusts of 25 mph or greater – AND relative humidity of 15% or less 2. Dry thunderstorms (15% coverage or more, constituting an LAL 6.)
OTHER FACTORS: In addition to the basic criteria above, a combination of other elements may result in Red Flag Conditions:
Haines Index (humidity in the air) of 5 or 6, indicating a moderate or high potential for large, plume dominated fire growth.
Wind shifts associated with frontal passages.
First significant lightning event (wet or dry) after an extended hot and dry period.
Poor relative humidity recovery overnight (RH remains at 40% or lower.)
Any combination of weather and fuel moisture conditions which, in the judgment of the forecaster, would cause extensive wildfire occurrences.
If a fire were to occur on a red flag day, it would be very difficult to suppress, the fuels are ready to burn and just need an ignition source.
Fire Danger Ratings, what we see on our Smokey Bear signs, are determined by the National Fire Danger Rating System coming from the Pueblo Interagency Dispatch Center.
For Very High Fire Danger, but not Red Flag, or in other words, No Burn Ban is in effect is when the above criteria from the National Weather Service does not have all the criteria met to be in a Red Flag Warning. Basically, hot, dry, and windy.
What actions should I take in response to a Red Flag Warning. Consider this to be your first warning of possible fire danger. Tag Large animals for release if necessary Bring deck cushions inside Stow BBQ propane tanks and doormats away from your home Prepare Pet Carrier(s) include food and medications. Set out and check your Go Bags. Gather personal medications. Hook up trailers. Load documents and other valuables Make sure gas tank(s) are full and vehicles are pointed out.