Red Flag Warning 26, NWS Salt Lake City, UT

000 
WWUS85 KSLC 220421
RFWSLC

RED FLAG WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1021 PM MDT SAT JUL 21 2007

UTZ420-423-426-220530-
/O.EXP.KSLC.FW.W.0026.000000T0000Z-070722T0400Z/
GREAT SALT LAKE DESERT AND MOUNTAINS-SALT LAKE AND TOOELE VALLEYS-
WASATCH MOUNTAINS NORTH OF I80-
1021 PM MDT SAT JUL 21 2007

...RED FLAG WARNING HAS EXPIRED FOR FIRE WEATHER ZONES 420...423...AND
426...

THE RED FLAG WARNING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY IS
NO LONGER IN EFFECT FOR FIRE WEATHER ZONES 420...423...AND 426.

WINDS HAVE DECREASED TO BELOW CRITICAL LEVELS THIS EVENING AS
RELATIVE HUMIDITIES HAVE INCREASED. MOISTURE WILL CONTINUE TO
INCREASE ACROSS THE AREA TOMORROW AND WINDS ARE EXPECTED TO BE
WEAKER THAN THEY WERE TODAY...SO RED FLAG CONDITIONS ARE NO
LONGER EXPECTED.

$$

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
1025 AM MDT SAT JUL 21 2007

.SYNOPSIS...STRONG UPPER RIDGE OVER THE GREAT BASIN WILL EXPAND
NORTH INTO THE NORTHERN ROCKIES OVER THE NEXT COUPLE OF DAYS.
MOISTURE OVER SOUTHERN AND EASTERN UTAH WILL SHIFT NORTH AND WEST
THROUGH MONDAY.

&&

.DISCUSSION...THE CENTER OF THE UPPER RIDGE CURRENTLY ALONG THE UT/CO
BORDER REGION WILL PRESS NORTH INTO SE MONTANA BY LATE MONDAY.
SUBSTANTIAL MOISTURE ALONG THE SRN FLANK OF THE UPPER HIGH WILL
FOLLOW THE CENTER NORTHWARD. PRECIPITABLE WATER (PW) VALUES GREATER
THAN
.75 OVER THE FAR NORTH...WITH AMOUNTS GREATER THAN 1.25 OVER THE
FAR SOUTH...ALONG WITH LIGHT FLOW ALOFT SUGGESTS THAT THUNDERSTORMS
COULD PRODUCE POCKETS OF HEAVY RAIN EARLY NEXT WEEK.

AREAL COVERAGE OF CONVECTION MAY NOT BE ALL THAT GREAT...EVEN WITH
THE ABUNDANT MOISTURE. CLOUD COVER WILL LIKELY INHIBIT SURFACE
HEATING...WHILE FAIRLY WARM MID-LEVEL TEMPS INDICATE THAT DEEP
LAYER INSTABILITY MAY NOT EXISTS IN MOST AREAS. ANY KIND OF DYNAMIC
LIFT WITH THIS MUCH PW COULD LEAD TO SIGNIFICANT CONVECTION...BUT
FOR NOW WILL TREND TOWARDS PRIMARILY MOUNTAIN CONVECTION
BEGINNING EARLY NEXT WEEK.

MOISTURE WILL LIKELY REMAIN OVER THE GREAT BASIN INTO AND THROUGH
MIDWEEK. WITH TIME CONDITIONS COULD BECOME MORE FAVORABLE FOR
WIDESPREAD CONVECTION...WITH THE POTENTIAL FOR HEAVY PRECIPITATION.

NO UPDATE PLANNED THIS MORNING.

&&

.AVIATION...SOUTHERLY WINDS NOT QUITE AS STRONG AS YESTERDAY ACROSS
THE KSLC TERMINAL LATE THIS MORNING. SHOULD SEE THE LAKE BREEZY
TURN EARLY TODAY...WITH THE 20 TO 21Z TIMEFRAME JUST ABOUT RIGHT.
NOT EXPECTING ANY THUNDERSTORMS NEAR THE TERMINAL LATER TODAY.

&&

.FIRE WEATHER...LESS WIND OVERALL TODAY THAN THE PAST FEW DAYS.
HOWEVER...ENOUGH SOUTHERLY FLOW IN PLACE TO GIVE ISOLATED LOCATIONS
IN NORTHWEST UTAH AND THE TOOELE VALLEY RED FLAG CRITERIA FOR A FEW
HOURS. GIVEN ACTIVE FIRE SITUATION...WILL LIKELY ISSUE RED FLAG FOR
420...THE TOOELE VALLEY PORTION OF 423....AND 426 WHERE WIND
CRITERIA IS ONLY 25 MPH. WEST CENTRAL AND SOUTHWEST UTAH WILL NOT
HAVE ENOUGH WIND FOR A WARNING...HOWEVER ISOLATED LOCATIONS MAY SEE
CRITERIA MET FOR A FEW HOURS.

THUNDERSTORM ACTIVITY EXPECTED TO BE FOCUSED MAINLY ALONG THE HIGHER
TERRAIN OF CENTRAL AND SOUTHERN UTAH TODAY. INITIAL STORMS ARE
CAPABLE OF PRODUCING STRONG GUSTY WINDS AND DRY LIGHTNING BEFORE
TRANSITIONING TO WET THUNDERSTORMS LATER THIS EVENING. DEEPER
MOISTURE SUNDAY THROUGH MIDWEEK REDUCES THE DRY LIGHTNING THREAT
STATEWIDE.

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...RED FLAG WARNING FIRE WEATHER ZONE 420...423...426 THROUGH 1000
     PM MDT.
WY...NONE.

&&

CONGER/B. SMITH

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

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
441 AM MDT SAT JUL 21 2007

UTZ001>016-019>021-517-518-WYZ021-221200-
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-
441 AM MDT SAT JUL 21 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL UTAH...
NORTHERN UTAH...SOUTHERN UTAH...SOUTHWEST UTAH AND SOUTHWEST
WYOMING.

.DAY ONE...TODAY AND TONIGHT

INCREASING MOISTURE ACROSS EASTERN...SOUTHERN AND CENTRAL UTAH
TODAY WILL RESULT IN ISOLATED TO SCATTERED SHOWERS AND
THUNDERSTORMS. ISOLATED AREAS OF HEAVY RAIN CAN BE EXPECTED WITH
THE STORMS OVER SOUTH CENTRAL UTAH TODAY. MEANWHILE...ISOLATED
DRY THUNDERSTORMS WITH GUSTY WINDS ARE POSSIBLE OVER PORTIONS OF
SOUTHWEST AND WEST CENTRAL UTAH.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

MOISTURE WILL CONTINUE TO SURGE ACROSS THE AREA THROUGH AT LEAST
TUESDAY. ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS CAN BE
EXPECTED ON SUNDAY...MAINLY ACROSS EASTERN AND SOUTH CENTRAL UTAH.
THUNDERSTORM ACTIVITY WILL THEN INCREASE AND SPREAD NORTH AND WEST
ON MONDAY AND TUESDAY. LOCALLY HEAVY RAIN IS POSSIBLE WITH THESE
STORMS SUNDAY THROUGH TUESDAY. MOISTURE THEN LINGERS OVER THE
AREA FOR A CHANCE OF SHOWERS AND THUNDERSTORMS THROUGH LATE IN THE
WEEK.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS SHOULD REPORT SIGNIFICANT WEATHER ACCORDING TO STANDARD
OPERATING PROCEDURES.

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