"Nancy2" wrote:
On Jun 28, 10:09 am, Janet Bostwick > wrote:
> On Thu, 28 Jun 2012 05:25:12 -0400, "Somebody"
>
> > wrote:
> >Red Flag Warning
> >Heat Advisory
> >Air Quality Alert
> >Hazardous Weather Outlook
>
> >Next 5 days all have 3 digits for the temperature prediction. This is not
> >good or normal.
>
> >I've never seen a "red flag warning" I thought that was a soccer thing.
>
> where do you live that hot, dry conditions don't favor wildfire
> danger?
> Janet US

Red flag here in Iowa doesn't ever mean wildfires, at least that I
know of. It's high temps plus humidity.


Here's the official definition of a Red Flag Warning from the National
Weather Service website:

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Red Flag Warning


A term used by fire-weather forecasters to call attention to limited weather
conditions of particular importance that may result in extreme burning
conditions. It is issued when it is an on-going event or the fire weather
forecaster has a high degree of confidence that Red Flag criteria will occur
within 24 hours of issuance. Red Flag criteria occurs whenever a
geographical area has been in a dry spell for a week or two, or for a
shorter period , if before spring green-up or after fall color, and the
National Fire Danger Rating System (NFDRS) is high to extreme and the
following forecast weather parameters are forecasted to be met:

1) a sustained wind average 15 mph or greater

2) relative humidity less than or equal to 25 percent and

3) a temperature of greater than 75 degrees F.

In some states, dry lightning and unstable air are criteria. A Fire Weather
Watch may be issued prior to the Red Flag Warning.

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--
bill n