weather forcast --> Red Flag Definition
On 6/29/2012 12:39 PM, Nancy2 wrote:
> On Jun 28, 9:07 pm, > wrote:
>> "Nancy2" wrote:
>>
>> On Jun 28, 10:09 am, Janet > wrote:
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>>> On Thu, 28 Jun 2012 05:25:12 -0400, "Somebody"
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>>> > 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:
>>
>> -----------------------
>>
>> 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
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>> 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.
>>
>> -----------------------
>> --
>> bill n
>
> Our weather guys use it for high heat and humidity. I don't know that
> we ever have humidity below 25% in the summer.
>
> N.
I've heard "code red" for hot days but not red flag. Actually a while
back "they" restandardized the color codes and mostly all I see now are
orange when it's really bad.
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