Red Flag Warning 15, NWS Salt Lake City, UT

000 
WWUS85 KSLC 200330
RFWSLC

RED FLAG WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
930 PM MDT MON MAY 19 2008

UTZ439-440-201200-
/O.CON.KSLC.FW.W.0015.080520T1900Z-080521T0300Z/
UTAHS DIXIE AND ZION CANYON-SOUTH CENTRAL UTAH-
930 PM MDT MON MAY 19 2008

...RED FLAG WARNING REMAINS IN EFFECT FROM 1 PM TO 9 PM MDT
TUESDAY FOR LOW HUMIDITY AND GUSTY WINDS IN FIRE WEATHER ZONES
439 AND 440...

A RED FLAG WARNING REMAINS IN EFFECT FROM 1 PM TO 9 PM MDT
TUESDAY.

STRONG SOUTHWEST WINDS AND VERY LOW HUMIDITIES WILL DEVELOP
ACROSS SOUTH-CENTRAL AND SOUTHWESTERN UTAH TUESDAY AFTERNOON AND
EVENING AHEAD OF A COLD FRONT. THIS WILL PRODUCE EXTREME FIRE
WEATHER CONDITIONS IN AREAS BELOW 8000 FEET WHERE FUELS ARE
CRITICALLY DRY.

THE EXTREME CONDITIONS ARE EXPECTED TO DIMINISH TUESDAY NIGHT.
THERE IS SOME POTENTIAL FOR THESE CONDITIONS TO REDEVELOP DURING
WEDNESDAY MORNING JUST AHEAD OF THIS FRONT...PARTICULARLY ACROSS
ZONE 440...AND THIS WARNING MAY NEED TO BE EXTENDED.

A RED FLAG WARNING MEANS THAT SEVERE FIRE WEATHER CONDITIONS ARE
EITHER OCCURRING NOW...OR EXPECTED TO DEVELOP.

$$

AOT

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

000 
WWUS85 KSLC 200944
RFWSLC

RED FLAG WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
344 AM MDT TUE MAY 20 2008

UTZ439-440-202100-
/O.CON.KSLC.FW.W.0015.080520T1900Z-080521T0300Z/
UTAHS DIXIE AND ZION CANYON-SOUTH CENTRAL UTAH-
344 AM MDT TUE MAY 20 2008

...RED FLAG WARNING REMAINS IN EFFECT FROM 1 PM THIS AFTERNOON TO
9 PM MDT THIS EVENING FOR STRONG WINDS AND LOW HUMIDITY FOR FIRE
WEATHER ZONES 439 AND 440...

A RED FLAG WARNING REMAINS IN EFFECT FROM 1 PM THIS AFTERNOON TO
9 PM MDT THIS EVENING FOR STRONG SOUTH WINDS AND LOW RELATIVE
HUMIDITY FOR FIRE WEATHER ZONES 439 AND 440 BELOW 8000 FEET.

STRONG SOUTHWEST WINDS AND VERY LOW HUMIDITIES WILL DEVELOP
ACROSS SOUTH-CENTRAL AND SOUTHWESTERN UTAH TUESDAY AFTERNOON AND
EVENING AHEAD OF A COLD FRONT. THIS WILL PRODUCE EXTREME FIRE
WEATHER CONDITIONS IN AREAS BELOW 8000 FEET WHERE FUELS ARE
CRITICALLY DRY.

THE EXTREME CONDITIONS ARE EXPECTED TO DIMINISH TUESDAY NIGHT.
THERE IS SOME POTENTIAL FOR THESE CONDITIONS TO REDEVELOP DURING
WEDNESDAY MORNING JUST AHEAD OF THIS FRONT...PARTICULARLY ACROSS
ZONE 440...AND THIS WARNING MAY NEED TO BE EXTENDED.

A RED FLAG WARNING MEANS THAT SEVERE FIRE WEATHER CONDITIONS ARE
EITHER OCCURRING NOW...OR EXPECTED TO DEVELOP.

$$

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

000 
WWUS85 KSLC 202003
RFWSLC

RED FLAG WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
203 PM MDT TUE MAY 20 2008

UTZ439-440-210600-
/O.EXT.KSLC.FW.W.0015.000000T0000Z-080521T0600Z/
UTAHS DIXIE AND ZION CANYON-SOUTH CENTRAL UTAH-
203 PM MDT TUE MAY 20 2008

...RED FLAG WARNING NOW IN EFFECT UNTIL MIDNIGHT MDT TONIGHT 
FOR GUSTY WINDS AND LOW HUMIDITIES FOR FIRE WEATHER ZONES
439 AND 440 BELOW 8000 FEET...

THE RED FLAG WARNING IS NOW IN EFFECT UNTIL MIDNIGHT MDT TONIGHT
FOR UTAHS DIXIE...ZION CANYON AND PORTIONS OF SOUTH CENTRAL UTAH 
BELOW 8000 FEET.

GUSTY SOUTH TO SOUTHWEST WINDS WILL CONTINUE THROUGHOUT THE
AFTERNOON AND INTO TONIGHT. HUMIDITIES WILL CONTINUE TO FALL THIS
AFTERNOON...WITH SOME LOCATIONS REACHING DOWN INTO THE SINGLE
DIGITS. GUSTY WINDS COMBINED WITH VERY LOW HUMIDITIES WILL PRODUCE
SEVERE FIRE WEATHER CONDITIONS FIRE WEATHER ZONES 439 AND 440
BELOW 8000 FEET THIS AFTERNOON INTO TONIGHT.

THE SEVERE FIRE WEATHER CONDITIONS ARE EXPECTED TO DIMINISH
OVERNIGHT. WHILE WINDS WILL REMAIN GUSTY...HUMIDITIES WILL SLOWLY
INCREASE AHEAD OF THE FRONT...REACHING ABOVE 15 PERCENT BY
MIDNIGHT TONIGHT.

A RED FLAG WARNING MEANS THAT SEVERE FIRE WEATHER CONDITIONS ARE
EITHER OCCURRING NOW...OR EXPECTED TO DEVELOP.

$$

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

000 
WWUS85 KSLC 210617
RFWSLC

RED FLAG WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1217 AM MDT WED MAY 21 2008

UTZ439-440-210730-
/O.EXP.KSLC.FW.W.0015.000000T0000Z-080521T0600Z/
UTAHS DIXIE AND ZION CANYON-SOUTH CENTRAL UTAH-
1217 AM MDT WED MAY 21 2008

...RED FLAG WARNING HAS EXPIRED...

THE RED FLAG WARNING IS NO LONGER IN EFFECT. 

THE RED FLAG WARNING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITIES
FOR FIRE WEATHER ZONES 439 AND 440 HAS BEEN ALLOWED TO EXPIRE AT
MIDNIGHT MDT TONIGHT. THOUGH RELATIVE HUMIDITIES ARE STILL BELOW
15 PERCENT IN THESE AREAS...WIND GUSTS HAVE DROPPED BELOW 30 MPH
IN MOST LOCATIONS. ISOLATED RED FLAG CONDITIONS MAY STILL EXIST IN
THESE AREAS...BUT RELATIVE HUMIDITIES ARE EXPECTED TO INCREASE 
TO ABOVE 15 PERCENT ACROSS THE ENTIRE AREA AS A COLD FRONT MOVES
THROUGH THE STATE WEDNESDAY MORNING.

$$

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
946 AM MDT MON MAY 19 2008

.SYNOPSIS...STRONG HIGH PRESSURE WILL REMAIN ACROSS THE WESTERN
STATES THROUGH TUESDAY. A COLD FRONT WILL MOVE THROUGH UTAH LATE
TUESDAY INTO WEDNESDAY. A COLD UPPER LOW WILL STALL OVER THE
EASTERN GREAT BASIN WEDNESDAY AND REMAIN IN PLACE INTO THE
MEMORIAL DAY WEEKEND.

&&

.DISCUSSION...AN AREA OF MID-LEVEL CLOUDINESS REMAINS ACROSS THE
UINTAS AND PARTS OF THE WASATCH MOUNTAINS THIS MORNING. UPDATED
FORECAST TO INCREASE CLOUD COVER THIS MORNING FOR THESE AREAS.
OTHERWISE...FORECAST IS ON TRACK...NO OTHER UPDATES ARE NEEDED.

A STRONG RIDGE OF HIGH PRESSURE WILL REMAIN ACROSS THE WEST
THROUGH TUESDAY. A WEAK COLD FRONT EMBEDDED IN THE NORTHWESTERLY
FLOW AROUND THE RIDGE WILL KEEP TEMPERATURES NEAR TO SLIGHTLY
BELOW YESTERDAYS READINGS ACROSS NORTHERN AND PARTS OF CENTRAL
UTAH. THE SHORTWAVE RIDGE WILL PUSH EASTWARD TUESDAY AFTERNOON AS
A STRONG AND COLD PACIFIC SYSTEM BEGINS TO IMPACT THE GREAT BASIN.
TUESDAY IS EXPECTED TO BE THE WARMEST DAY OF THE HEAT WAVE...WITH
TEMPERATURES EXCEEDING RECORD LEVELS FOR MANY LOCATIONS.

STRONG SOUTHWESTERLY WINDS WILL DEVELOP AHEAD OF THE PACIFIC
SYSTEM TUESDAY. SEE THE FIRE WEATHER DISCUSSION FOR ADDITIONAL
INFORMATION ON THE FIRE WEATHER WATCH FOR PORTIONS OF SOUTHWEST
AND SOUTH CENTRAL UTAH TUESDAY. IN ADDITION...SEE THE HYDROLOGY
DISCUSSION REGARDING ENHANCED HIGH ELEVATION SNOWPACK IN RELATION
TO THE VERY WARM TEMPERATURES OVER THE PAST FEW DAYS AND THE
POTENTIAL IMPACT OF THE APPROACHING PACIFIC SYSTEM.

EC AND GFS CONTINUE TO INDICATE THE ASSOCIATED COLD FRONT WILL
PUSH THROUGH NORTHERN UTAH TUESDAY EVENING INTO WEDNESDAY MORNING.
A BLOCKING PATTERN IS EXPECTED TO DEVELOP...KEEPING A SERIES OF
CUT- OFF UPPER LEVEL LOWS OVER THE INTERIOR WEST THROUGH THE
MEMORIAL DAY WEEKEND. WILL WAIT FOR THE 12Z RUNS TO ADJUST ANY OF
THE GRIDS BEYOND TUESDAY.

&&

.HYDROLOGY...WITH TEMPS REACHING 90F AT SLC YESTERDAY...RAPID
SNOW MELT HAS BEGUN AND SOME RIVERS IN NORTHWEST UT ARE NEARING
BANK FULL. THIS HEAT WAVE WILL PERSIST TODAY AND TUESDAY BEFORE
THE COLD FRONT SHUTS OFF THE SNOW MELT WED SO ADDITIONAL RISES
SEEM LIKELY. THE WILD CARD REMAINS HOW MUCH PRECIP FALLS AS HIGH
ELEVATION RAIN WED MORNING BEFORE IT GETS COLD ENOUGH TO LOWER THE
SNOW LEVEL. AT THIS TIME...IT APPEARS THERE MAY BE SEVERAL HOURS
OF MODERATE TO HEAVY RAIN UP TO ABOUT 9000 FT WED MORNING. IN
ADDITION...LOWER ELEVATION RAINS WILL CONTINUE INTO THE EVENING
BEFORE TAPERING OFF AND THIS RUNOFF WILL PROBABLY ADD TO THE FLOWS
COMING OFF THE HIGHER ELEVATIONS FROM EARLIER IN THE DAY. RIVER
LEVELS SHOULD START TO FALL BY THU AFTERNOON ONCE THIS RUNOFF
STOPS.

&&

.AVIATION...VFR CONDITIONS WILL PREVAIL AT THE SLC TERMINAL THROUGH
THE DAY TODAY. NORTHWEST WINDS WILL DEVELOP AGAIN AROUND 17-18Z.

&&

.FIRE WEATHER...HIGH PRESSURE OVER THE AREA THROUGH TUESDAY WILL
KEEP A WARM...DRY AND STABLE AIRMASS OVER THE AREA. INCREASING
SOUTHERLY WINDS TUESDAY AFTERNOON AHEAD OF AN APPROACHING STORM
SYSTEM WILL COMBINE WITH AN ALREADY DRY AIRMASS TO CREATE CRITICAL
FIRE WEATHER CONDITIONS OVER PORTIONS OF SOUTHWEST AND SOUTH-CENTRAL
UTAH WHERE FUELS ARE DRY. A FIRE WEATHER WATCH REMAINS IN EFFECT FOR
TUESDAY AFTERNOON AND EVENING FOR FIRE WEATHER ZONES 439 AND 440
BELOW 8000FT.

THE COLD FRONT ASSOCIATED WITH THE STORM SYSTEM WILL PUSH ACROSS
NORTHERN UTAH TUESDAY NIGHT AND INTO SOUTHERN UTAH ON WEDNESDAY.
WINDS WILL REMAIN STRONG ACROSS THE AREA WEDNESDAY AFTERNOON BEHIND
THE FRONT. CRITICAL FIRE WEATHER CONDITIONS ARE POSSIBLE ACROSS
SOUTHWEST AND SOUTH-CENTRAL UTAH THROUGH THE EARLY PART OF THE DAY
WEDNESDAY...BUT HUMIDITIES ARE EXPECTED TO RECOVER ABOVE CRITICAL
LEVELS DURING THE AFTERNOON. A COOLER AND MOIST AIRMASS WILL THEN
LINGER OVER THE AREA THROUGH THE WEEKEND AS THE STORM SYSTEM PARKS
ITSELF OVER THE GREAT BASIN.

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...FIRE WEATHER WATCH FROM 1 PM TUESDAY TO 9 PM TUESDAY FOR UTZ019-
     UTZ020.

WY...NONE.

&&

KRUSE/SEAMAN

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
603 AM MDT MON MAY 19 2008

UTZ001>016-019>021-517-518-WYZ021-201100-
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-
603 AM MDT MON MAY 19 2008

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

.DAY ONE...TODAY AND TONIGHT

UNSEASONABLY WARM TEMPERATURES WILL CONTINUE TODAY WITH RECORD OR
NEAR RECORD HIGHS IN SOME LOCATIONS. RAPID SNOW MELT FROM THIS
HEAT HAS BROUGHT HIGH FLOWS TO RIVERS AND STREAMS THROUGHOUT
NORTHERN UTAH. THE COLD AND RAPID WATER FLOW WILL INCREASE DANGER
NEAR WATERWAYS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

THE HEAT WAVE WILL PERSIST ACROSS THE OUTLOOK AREA ON TUESDAY.
HIGH TEMPERATURES WILL ONCE AGAIN APPROACH OR EXCEED RECORD
LEVELS FOR MANY LOCATIONS.

SIGNIFICANT SNOW MELT WILL CONTINUE FROM THE UPPER ELEVATIONS WITH
RIVER AND STREAM FLOW REMAINING COLD...FAST AND DANGEROUS.

A COLD FRONT IS EXPECTED TUESDAY NIGHT AND WEDNESDAY. THE FRONT
WILL BRING STRONG GUSTY WINDS TUESDAY AFTERNOON THROUGH
WEDNESDAY...THEN SHARP COOLING ALONG WITH WIDESPREAD PRECIPITATION
ON WEDNESDAY BEHIND THE FRONT...ESPECIALLY OVER WESTERN AND
NORTHERN UTAH. LOWERING SNOW LEVELS WILL HALT THE SNOW MELT
WEDNESDAY BUT RIVERS WILL NOT RECEDE UNTIL SOMETIME THURSDAY.

THE WINDS COMBINED WITH LOW RELATIVE HUMIDITIES AHEAD OF THE
FRONT WILL LIKELY LEAD TO HAZARDOUS FIRE WEATHER CONDITIONS
TUESDAY AFTERNOON AND EVENING ACROSS SOUTHERN UTAH.

UNSETTLED WET AND COOL WEATHER IS EXPECTED TO CONTINUE THURSDAY
THROUGH SUNDAY.

.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)