Public Information Statement
Issued by NWS Riverton, WY

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WYZ001>020-022>030-242100-

PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE RIVERTON WY
600 AM MDT THU APR 24 2014

...THIS IS SEVERE WEATHER AWARENESS WEEK IN WYOMING...

THE WEEK OF APRIL 21 TO APRIL 25 HAS BEEN DESIGNATED SEVERE WEATHER
AWARENESS WEEK IN WYOMING. TODAY WE WILL DISCUSS FIRE WEATHER.

WHAT IS FIRE WEATHER AND WHY WOULD IT BE INCLUDED IN SEVERE WEATHER
AWARENESS WEEK?

FIRE WEATHER IS A BROAD TERM USED TO DESCRIBE WEATHER VARIABLES THAT
INFLUENCE FIRE POTENTIAL...BEHAVIOR...AND SUPPRESSION. THE NATIONAL
WEATHER SERVICE ISSUES WATCHES AND WARNINGS WHEN WEATHER VARIABLES
ENCOURAGE EXTREME FIRE BEHAVIOR...JUST LIKE THE NATIONAL WEATHER
SERVICE DOES FOR EXTREME WINTER WEATHER CONDITIONS OR FOR SEVERE
THUNDERSTORMS.

THERE ARE TWO PRODUCTS ISSUED TO WARN OF EXTREME FIRE BEHAVIOR. THE
FIRST IS A FIRE WEATHER WATCH WHICH IS ISSUED WHEN THE WEATHER IS
EXPECTED TO ENCOURAGE EXTREME FIRE BEHAVIOR A COUPLE OF DAYS FROM
NOW...AND IT IS OFTEN UPGRADED TO WHAT IS KNOWN AS A RED FLAG WARNING
ONCE THE TIME OF THE ANTICIPATED CONDITIONS DRAWS NEAR.

WHEN IS A RED FLAG WARNING ISSUED?

THE MAIN TWO WEATHER ELEMENTS THAT ENCOURAGE EXPLOSIVE FIRE GROWTH
IS VERY LOW RELATIVE HUMIDITY AND BREEZY WINDS. HUMIDITY BELOW 15
PERCENT IN COMBINATION WITH GUSTY WINDS ABOVE 25 MPH...HAVE SHOWN TO
RESULT IN EXPLOSIVE FIRE GROWTH WHEN FUELS ARE CRITICAL. IF THESE
CONDITIONS ARE EXPECTED THEN A RED FLAG WARNING IS ISSUED WITHIN 24
HOURS OF THE EVENT.

A RED FLAG WARNING WILL ALSO BE ISSUED WHEN THUNDERSTORMS WITH
LITTLE OR NO RAINFALL ARE EXPECTED WHEN FUELS ARE CRITICAL. DRY
THUNDERSTORMS CAN INITIATE MULTIPLE NEW FIRE STARTS...WHICH CAN TAX
FIRE FIGHTING RESOURCES.

IF A RED FLAG WARNING IS ISSUED FOR YOUR AREA...THIS IS YOUR SIGNAL
TO BE EVEN MORE CAUTIOUS WITH FIRE.

WILDFIRES CAN BE STARTED BY THE SLIGHTEST SPARK...EVEN FROM SOMETHING
AS PERCEPTIVELY HARMLESS AS PARKING AN ATV IN THE GRASS...THE WARM
MUFFLER MAY START A GRASS FIRE.

CHECK FOR CURRENT BURN BANS FOR YOUR COUNTY...AND PLEASE TAKE
THEM SERIOUSLY. IF YOU PLAN ON DOING SOME AGRICULTURAL BURNING...
PLEASE NOTIFY YOUR LOCAL SHERIFF AND FIRE DEPARTMENT TO ENSURE THAT
IT IS LEGAL AND THAT YOU DO NOT CAUSE ANY FALSE ALARM CALLS.

ALSO PLEASE CALL THE NATIONAL WEATHER SERVICE AT 800-211-1448 FOR A
FORECAST FIRST SO THAT YOU ENSURE THAT RED FLAG CONDITIONS WILL NOT
DEVELOP AND CAUSE YOUR FIRE TO BECOME UNCONTROLLABLE.

SEVERE AWARENESS WEEK IN WYOMING WILL END TOMORROW WITH A TEST
TORNADO WARNING AT 1030 AM MDT ISSUED BY NATIONAL WEATHER SERVICE
OFFICES SERVING WYOMING. THIS TEST TORNADO WARNING WILL BE FOLLOWED
BY A TEST SEVERE WEATHER STATEMENT AT 1045 AM MDT WHICH WILL CANCEL
THE TEST WARNING.

THIS STATEWIDE DRILL OFFERS GOVERNMENT OFFICIALS...LAW ENFORCEMENT
AGENCIES...SCHOOLS...AND BUSINESSES AS WELL AS OTHER PRIVATE GROUPS
AND CITIZENS THE CHANCE TO TEST THEIR SEVERE WEATHER COMMUNICATIONS
AND PLANS IN ADVANCE OF SEVERE WEATHER SEASON. THE NATIONAL WEATHER
SERVICE ENCOURAGES PARTICIPATION IN THIS DRILL.

KELLY ALLEN
METEOROLOGIST AND FIRE WEATHER PROGRAM MANAGER
NATIONAL WEATHER SERVICE
RIVERTON WY
WEATHER.GOV/RIVERTON

$$




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