Red Flag Warning 30, NWS Riverton, WY

721 
WWUS85 KRIW 191806
RFWRIW

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE RIVERTON WY
1206 PM MDT MON SEP 19 2016

...RED FLAG WARNING FROM NOON TO 8 PM MDT FOR STRONG GUSTY WIND
AND LOW RELATIVE HUMIDITY...

.INCREASING WIND...WARM TEMPERATURES AND LOW RELATIVE HUMIDITY
WILL COMBINE WITH CRITICALLY DRY FUELS PRODUCING CONDITIONS
FAVORABLE FOR FIRES WITH RAPID RATES OF SPREAD THIS AFTERNOON AND
EARLY EVENING.

WYZ277-279-289-200200-
/O.CON.KRIW.FW.W.0030.000000T0000Z-160920T0200Z/
LINCOLN AND UINTA COUNTIES/LOWER ELEVATIONS-
SWEETWATER COUNTY/ROCK SPRINGS BLM/FLAMING GORGE NRA-
GRANITE/GREEN/FERRIS/RATTLESNAKE MOUNTAINS-
1206 PM MDT MON SEP 19 2016

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MDT THIS EVENING
FOR LOW HUMIDITY AND WIND FOR FIRE WEATHER ZONES 277...279 AND
289...

* AFFECTED AREA...FIRE WEATHER ZONES 277...279 AND 289.

* WIND...WEST TO SOUTHWEST 15 TO 20 MPH WITH GUSTS AROUND 30 
  MPH.

* HUMIDITY...12 TO 15 PERCENT.

* IMPACTS...ANY FIRES THAT DEVELOP WILL LIKELY SPREAD RAPIDLY. 
  OUTDOOR BURNING IS NOT RECOMMENDED.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS
ARE EITHER OCCURRING NOW....OR WILL SHORTLY. A COMBINATION OF
STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES CAN
CONTRIBUTE TO EXTREME FIRE BEHAVIOR.

&&

$$

21

516 
WWUS85 KRIW 192047
RFWRIW

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE RIVERTON WY
247 PM MDT MON SEP 19 2016

...RED FLAG WARNING THROUGH 8 PM MDT FOR GUSTY WIND AND LOW
RELATIVE HUMIDITY FOR ZONES 277, 279, AND 289...

...FIRE WEATHER WATCH FOR TUESDAY AFTERNOON AND EVENING FOR LOW
RELATIVE HUMIDITY, GUSTY SOUTHWEST WIND AND A HAINES INDEX OF 6
FOR ZONES 280 AND 289...

.WINDY WEST TO SOUTHWEST WIND...AND LOW RELATIVE HUMIDITY WILL
CONTINUE ACROSS THE SOUTH THROUGH EARLY EVENING...BEFORE WINDS BEGIN
TO SUBSIDE AND RELATIVE HUMIDITIES RECOVER ABOVE CRITICAL VALUES.
ON TUESDAY...A VERY DRY AIR MASS...BREEZY SOUTHWEST WIND AND A
HAINES INDEX OF A 6 COULD COMBINE FOR CRITICAL FIRE WEATHER
CONDITIONS ACROSS SOUTHEAST FREMONT INTO MUCH OF NATRONA COUNTIES.

WYZ289-201245-
/O.NEW.KRIW.FW.A.0025.160920T1800Z-160921T0200Z/
/O.CON.KRIW.FW.W.0030.000000T0000Z-160920T0200Z/
GRANITE/GREEN/FERRIS/RATTLESNAKE MOUNTAINS-
247 PM MDT MON SEP 19 2016

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MDT THIS EVENING
FOR LOW RELATIVE HUMIDITY AND GUSTY WIND FOR FIRE WEATHER ZONE
289...

...FIRE WEATHER WATCH IN EFFECT FROM TUESDAY AFTERNOON THROUGH
TUESDAY EVENING FOR VERY LOW RELATIVE HUMIDITY...GUSTY WINDS AND A
HAINES INDEX OF 6 FOR FIRE WEATHER ZONE 289...

THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A FIRE
WEATHER WATCH...WHICH IS IN EFFECT FROM TUESDAY AFTERNOON THROUGH
TUESDAY EVENING. A RED FLAG WARNING REMAINS IN EFFECT THROUGH THIS
EVENING.

* AFFECTED AREA...FIRE WEATHER ZONES 289.

* WIND...WEST TO SOUTHWEST 15 TO 20 MPH WITH GUSTS AROUND 30 
  MPH.

* HUMIDITY THIS AFTERNOON AND EVENING...AROUND 15 PERCENT THROUGH
  EARLY EVENING.

* HUMIDITY TUESDAY AFTERNOON AND EVENING...AROUND 10 PERCENT.

* IMPACTS...ANY FIRES THAT DEVELOP WILL LIKELY SPREAD RAPIDLY. 
  OUTDOOR BURNING IS NOT RECOMMENDED.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS
ARE EITHER OCCURRING NOW....OR WILL SHORTLY. A COMBINATION OF
STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES CAN
CONTRIBUTE TO EXTREME FIRE BEHAVIOR.

&&

$$

WYZ277-279-200200-
/O.CON.KRIW.FW.W.0030.000000T0000Z-160920T0200Z/
LINCOLN AND UINTA COUNTIES/LOWER ELEVATIONS-
SWEETWATER COUNTY/ROCK SPRINGS BLM/FLAMING GORGE NRA-
247 PM MDT MON SEP 19 2016

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MDT THIS EVENING
FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES
277 AND 279...

* AFFECTED AREA...FIRE WEATHER ZONES 277 AND 279.

* WIND...WEST TO SOUTHWEST 15 TO 20 MPH WITH GUSTS AROUND 30 
  MPH.

* HUMIDITY...12 TO 15 PERCENT.

* IMPACTS...ANY FIRES THAT DEVELOP WILL LIKELY SPREAD RAPIDLY. 
  OUTDOOR BURNING IS NOT RECOMMENDED.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS
ARE EITHER OCCURRING NOW....OR WILL SHORTLY. A COMBINATION OF
STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES CAN
CONTRIBUTE TO EXTREME FIRE BEHAVIOR.

&&

$$

WYZ280-201245-
/O.NEW.KRIW.FW.A.0025.160920T1800Z-160921T0200Z/
NATRONA COUNTY/CASPER BLM-
247 PM MDT MON SEP 19 2016

...FIRE WEATHER WATCH IN EFFECT FROM TUESDAY AFTERNOON AND TUESDAY
EVENING FOR GUSTY SOUTHWEST WIND, LOW RELATIVE HUMIDITY, AND A
HAINES OF 6 FOR FIRE WEATHER ZONE 280...

THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A FIRE
WEATHER WATCH...WHICH IS IN EFFECT FROM TUESDAY AFTERNOON THROUGH
TUESDAY EVENING. 

* AFFECTED AREA...FIRE WEATHER ZONE 280.

* WIND...SOUTHWEST WIND 10 TO 15 MPH WITH GUSTS 20 TO 25 MPH.

* HUMIDITY...AROUND 10 PERCENT

* HAINES INDEX...6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED
  FIRE GROWTH.

* IMPACTS...ANY FIRES THAT DEVELOP WILL LIKELY SPREAD RAPIDLY. 
  OUTDOOR BURNING IS NOT RECOMMENDED.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FIRE WEATHER WATCH MEANS THAT CRITICAL FIRE WEATHER CONDITIONS
ARE FORECAST TO OCCUR. LISTEN FOR LATER FORECASTS AND POSSIBLE
RED FLAG WARNINGS.

&&

$$

21

Area Forecast Discussion
National Weather Service Riverton WY
1045 PM MDT SUN SEP 18 2016

.Short Term...Tonight Through Monday (Issued at 227 PM MDT)

Increasing west flow aloft will continue to bring limited
moisture will bring some light showers to the northern
mountains...and warmer temperatures. across the south windy
conditions will develop by noon Monday. Relative humidity will
become quite low combining with the strong wind gusts and
critically dry fuels producing conditions favorable for fires with
rapid rates of spread.

.Long Term...Monday Night Through Sunday

The flow aloft will continue to increase and slowly shift to the
southwest Tuesday with continued windy areas and low relative
humidity and a few showers across the north as temperatures
continue to warm. Monday night through tuesday night.  As a low
pressure trough in the eastern Pacific moves east towards the west
coast...moisture will increase in the southwest flow with
increasing afternoon and evening showers and isolated
thunderstorms across the western mountains Thursday.  Showers
will become widespread and spread east with much of the area
receiving precipitation Thursday through Friday with significant
cooling. Significant snowfall may develop in the mountains
Thursday night lifting to the higher mountains on Friday.
Precipitation is expected to decrease on Saturday as the Pacific
trough moves east of the area and cold northwest flow spreads over
the area. Clearing will occur Saturday night with cold
temperatures as high pressure builds in from the west. Sunday
looks dry with slow warming.

&&

.Aviation.../06Z Issuance/

VFR conditions will occur through Monday night. Isolated showers
over the north will end by 12z. LLWS will be an issue for many
terminal sites through 18z. A gusty wind will occur at most terminal
sites Monday afternoon. The wind will decrease between 01z and 02z
at the terminal sites.

&&

.Fire Weather...

...Fire Weather Watch for low relative humidity and strong wind
gusts noon to 8 pm mdt Monday zones 277 279 and 289...

Increasing west flow aloft will continue to bring limited
moisture will bring some light showers to the northern
mountains...and warmer temperatures. across the south windy
conditions will develop by noon Monday. Relative humidity will
become quite low combining with the strong wind gusts and
critically dry fuels producing conditions favorable for fires with
rapid rates of spread.

&&

.RIW Watches/Warnings/Advisories...

Fire Weather Watch from Monday afternoon through Monday evening
for WYZ277-279-289.

&&

SHORT TERM...C.Baker
LONG TERM...C.Baker
AVIATION...AR
FIRE WEATHER...C.Baker

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE RIVERTON WY
236 PM MDT SUN SEP 18 2016

WYZ001>020-022>030-192045-
YELLOWSTONE NATIONAL PARK-ABSAROKA MOUNTAINS-CODY FOOTHILLS-
NORTH BIG HORN BASIN-SOUTHWEST BIG HORN BASIN-
SOUTHEAST BIG HORN BASIN-OWL CREEK AND BRIDGER MOUNTAINS-
BIGHORN MOUNTAINS WEST-BIGHORN MOUNTAINS SOUTHEAST-
NORTHEAST JOHNSON COUNTY-SOUTHEAST JOHNSON COUNTY-
TETON AND GROS VENTRE MOUNTAINS-JACKSON HOLE-
WIND RIVER MOUNTAINS WEST-WIND RIVER MOUNTAINS EAST-
UPPER WIND RIVER BASIN-WIND RIVER BASIN-LANDER FOOTHILLS-
GREEN MOUNTAINS AND RATTLESNAKE RANGE-
NATRONA COUNTY LOWER ELEVATIONS-CASPER MOUNTAIN-STAR VALLEY-
SALT RIVER AND WYOMING RANGES-UPPER GREEN RIVER BASIN FOOTHILLS-
UPPER GREEN RIVER BASIN-SOUTH LINCOLN COUNTY-
ROCK SPRINGS AND GREEN RIVER-FLAMING GORGE-EAST SWEETWATER COUNTY-
236 PM MDT SUN SEP 18 2016

...FIRE WEATHER WATCH FOR STRONG WIND GUSTS AND VERY LOW RELATIVE
HUMIDITY MONDAY NOON TO 8 PM MDT ACROSS THE SOUTHWEST...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN AND CENTRAL
WYOMING.

.DAY ONE...THIS AFTERNOON AND TONIGHT

ELEVATED TO NEAR CRITICAL FIRE WEATHER CONDITIONS WEST OF THE
DIVIDE AND OVER PORTIONS OF CENTRAL WYOMING.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

A FIRE WEATHER WATCH WITH STRONG WIND GUSTS AND VERY LOW RELATIVE
HUMIDITY ACROSS UINTA... SOUTHERN LINCOLN...SWEETWATER AND
SOUTHERN FREMONT COUNTY. INCREASING SHOWERS IN THE NORTHERN
MOUNTAINS.

CONTINUE DRY AND WINDY ON TUESDAY AND TUESDAY EVENING.

SHOWERS AND ISOLATED THUNDERSTORMS DEVELOPING IN THE WEST
WEDNESDAY.  INCREASING AFTERNOON AND EVENING SHOWERS AND ISOLATED
THUNDERSTORMS ACROSS THE WESTERN MOUNTAINS THURSDAY. SHOWERS WILL
BECOME WIDESPREAD AND SPREAD EAST WITH MUCH OF THE AREA RECEIVING
PRECIPITATION THURSDAY THROUGH FRIDAY WITH SIGNIFICANT COOLING.
SIGNIFICANT SNOWFALL MAY DEVELOP IN THE MOUNTAINS THURSDAY NIGHT
LIFTING TO THE HIGHER MOUNTAINS ON FRIDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT.