Red Flag Warning 3, NWS Salt Lake City, UT

056 
WWUS85 KSLC 012020
RFWSLC

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
220 PM MDT TUE JUN 1 2010

UTZ440-441-020300-
/O.CON.KSLC.FW.W.0003.000000T0000Z-100602T0300Z/
SOUTH CENTRAL UTAH-GLEN CANYON RECREATION AREA/LAKE POWELL-
220 PM MDT TUE JUN 1 2010

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING
FOR GUSTY WINDS AND LOW HUMIDITY FOR FIRE ZONES 440 AND 441...

* AFFECTED AREA: FIRE ZONE 440 SOUTH CENTRAL UTAH AND FIRE ZONE 
  441 GLEN CANYON RECREATION AREA/LAKE POWELL.

* WIND: SOUTHWEST WINDS OF 15 TO 25 MPH WITH GUSTS UP TO 35 MPH
  ARE EXPECTED TO CONTINUE THROUGH THIS EVENING.

* HUMIDITY: HUMIDITIES WILL REMAIN BELOW 15 PERCENT THROUGH THIS
  EVENING.

* IMPACTS: THE COMBINATION OF LOW HUMIDITY AND GUSTY WINDS WILL
  CREATE HAZARDOUS FIRE WEATHER CONDITIONS.

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 WILL
CREATE EXPLOSIVE FIRE GROWTH POTENTIAL.

&&

$$


FOR MORE INFORMATION FROM NOAA/S NATIONAL WEATHER SERVICE VISIT...
HTTP://WEATHER.GOV/SALTLAKECITY (ALL LOWER CASE)

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
217 AM MDT TUE JUN 1 2010

.SYNOPSIS...A WEAK WEATHER SYSTEM WILL CROSS NORTHERN UTAH TODAY.
OTHERWISE A DRY AND MILD WESTERLY FLOW ALOFT WILL PREVAIL THROUGH
THE REMAINDER OF THE WEEK.

&&

.DISCUSSION...PREDOMINANTLY ZONAL FLOW EXTENDS ACROSS THE EASTERN
PACIFIC THROUGH THE WESTERN CONUS EARLY THIS MORNING. PROGRESSIVE
SHORTWAVE TROUGH EMBEDDED WITHIN THIS FLOW IS CURRENTLY CROSSING
THE SIERRAS...AND WILL CONTINUE EASTWARD THROUGH NORTHERN UT LATER
TODAY. AHEAD OF THIS FEATURE A BAND OF SHOWERS ROUGHLY ALONG 700MB
DEFORMATION AXIS CONTINUES TO EXPAND ACROSS NORTHWEST UT. 00Z/06Z
NAM RUNS SEEMED TO PICK UP ON THIS WELL AND HAVE LEANED TOWARD
NAM SOLUTION THROUGH TONIGHT. AS A RESULT ANTICIPATE BEST CHANCE
FOR PRECIPITATION TO REMAIN NORTH OF I-80...AND GENERALLY CONFINED
ALONG THE ID BORDER. HAVE KEPT LIKELY POPS ACROSS THESE AREAS
TAPERING TO LOW CHANCE POPS FURTHER SOUTH ACROSS THE SALT
LAKE/TOOELE VALLEYS. ALSO INCLUDED ISOLATED THUNDER THIS
AFTERNOON/EVENING AS MODELS SHOW WEAK INSTABILITY WITH SBCAPE
AROUND 200 J/KG.

EXTENSIVE CLOUD COVER COMBINED WITH COOL OUTFLOW WILL LIKELY LIMIT
DAYTIME HEATING SIGNIFICANTLY ACROSS THE NORTHERN THIRD OF UTAH
WITH TEMPS EXPECTED TO RUN 5-10 DEGREES BELOW CLIMO. FURTHER SOUTH
SLIGHT COOLING ALOFT COMBINED WITH INCREASED CLOUD COVER SHOULD
ALSO RESULT IN A SLIGHT COOLING TREND WITH TEMPS CLOSER TO NORMAL
FOR THIS TIME OF YEAR.

IN THE WAKE OF THIS WAVE...PRIMARY BELT OF WESTERLIES IS STILL
FORECAST TO RETREAT NORTHWARD INTO THE NORTHERN ROCKIES AS A
SUBTROPICAL RIDGE SLOWLY BECOMES ESTABLISHED ACROSS THE DESERT
SOUTHWEST. SOUTHERN UT WILL COME UNDER THE INFLUENCE OF THIS
BUILDING RIDGE RESULTING IN A WARMING TREND FOR THE LATTER HALF OF
THE WEEK AND INTO THE UPCOMING WEEKEND.

FURTHER NORTH 700MB BAROCLINIC ZONE LOOKS TO REMAIN DRAPED ACROSS
NORTHERN UT THROUGHOUT THE LATTER HALF OF THE WEEK. THIS WILL
ALLOW FOR CONSIDERABLE MID/HIGH LEVEL CLOUD COVER...LIMIT WARMING
TREND...AND LEAVE AREAS ALONG THE ID BORDER SUSCEPTIBLE TO
PASSING WAVES.

&&

.FIRE WEATHER...WHILE A WEAK WAVE MOVES ACROSS NORTHERN UTAH THROUGH
TODAY...SOUTHWEST FLOW WILL PERSIST ACROSS SOUTHERN UTAH. IN SOUTH
CENTRAL UTAH...THIS IS EXPECTED TO PRODUCE SIMILAR CONDITIONS TO
YESTERDAY WITH GUSTY WINDS AND RH VALUES BELOW 15 PERCENT. AS
SUCH...HAVE ISSUED A RED FLAG WARNING FOR FIRE ZONES 440 AND 441.
FARTHER WEST IN ZONE 439 CONDITIONS MAY BE CLOSE TO CRITICAL...BUT A
SOMEWHAT COOLER AND MOISTER AIRMASS IS EXPECTED TO KEEP AFTERNOON
HUMIDITIES JUST ABOVE 15 PERCENT.

&&

.AVIATION...SURFACE WINDS AT THE SLC TERMINAL WILL LIKELY REMAIN
LIGHT AND VARIABLE THROUGH THE MORNING HOURS BEFORE INCREASING FROM
THE NORTHWEST IN THE LATE MORNING AND EARLY AFTERNOON. THERE IS A 40
PERCENT CHANCE THAT CEILINGS WILL DROP BELOW 7000FT AGL TODAY DUE TO
THE APPROACHING RAIN SHOWERS. THESE SHOWERS WILL CONTINUE ACROSS
NORTHERN UTAH THROUGH MUCH OF THE DAY...ALSO BRINGING A SLIGHT
CHANCE OF MVFR CONDITIONS AND GUSTY VARIABLE WINDS.

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...NONE.
WY...NONE.
&&

SEAMAN/SCHOENING

FOR MORE INFORMATION FROM NOAA/S NATIONAL WEATHER SERVICE VISIT...
HTTP://WEATHER.GOV/SALTLAKECITY (ALL LOWER CASE)

FOR FREQUENTLY ASKED QUESTIONS ABOUT THE AREA FORECAST DISCUSSION
VISIT...
HTTP://WEATHER.GOV/SALTLAKECITY/GENERAL/AFD_FAQS.PHP (ALL LOWER CASE)

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
636 AM MDT MON MAY 31 2010

UTZ001>016-019>021-517-518-WYZ021-011200-
CACHE VALLEY/UTAH PORTION-NORTHERN WASATCH FRONT-
SALT LAKE AND TOOELE VALLEYS-SOUTHERN WASATCH FRONT-
GREAT SALT LAKE DESERT AND MOUNTAINS-WASATCH MOUNTAIN VALLEYS-
WASATCH MOUNTAINS I-80 NORTH-WASATCH MOUNTAINS SOUTH OF I-80-
WESTERN UINTA MOUNTAINS-WASATCH PLATEAU/BOOK CLIFFS-
WESTERN UINTA BASIN-CASTLE COUNTRY-SAN RAFAEL SWELL-
SANPETE/SEVIER VALLEYS-WEST CENTRAL UTAH-SOUTHWEST UTAH-
UTAHS DIXIE AND ZION NATIONAL PARK-SOUTH CENTRAL UTAH-
GLEN CANYON RECREATION AREA/LAKE POWELL-CENTRAL MOUNTAINS-
SOUTHERN MOUNTAINS-SOUTHWEST WYOMING-
636 AM MDT MON MAY 31 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN TWO THIRDS OF
UTAH AND SOUTHWEST WYOMING.

.DAY ONE...TODAY AND TONIGHT

GUSTY SOUTHWEST WINDS COMBINED WITH LOW RELATIVE HUMIDITY AND DRY
FUELS WILL RESULT IN CRITICAL FIRE WEATHER CONDITIONS ACROSS FAR
SOUTHERN UTAH THIS AFTERNOON. SEE THE LATEST RED FLAG WARNING FOR
DETAILS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

A WEAK STORM SYSTEM WILL BRUSH NORTHERN UTAH TUESDAY BRINGING A
SMALL CHANCE FOR SHOWERS AND THUNDERSTORMS.

A WARMING TREND WILL ENSUE FOR THE LATTER HALF OF THE WEEK...WITH
ABOVE NORMAL TEMPERATURES ACROSS SOUTHERN UTAH...AND NEAR TO
SLIGHTLY ABOVE NORMAL TEMPERATURES ACROSS THE NORTH.

THE SPRING RUNOFF IS WELL UNDERWAY. RIVERS AND STREAMS ARE
RUNNING COLD AND FAST. THESE WATERS POSE AN EXTRA DANGER TO
CHILDREN AND PETS. EXERCISE CAUTION NEAR ANY FAST FLOWING
WATERWAYS.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

FOR MORE INFORMATION FROM NOAA/S NATIONAL WEATHER SERVICE VISIT...
HTTP://WEATHER.GOV/SALTLAKECITY (ALL LOWER CASE)