Wind Advisory 23, NWS Salt Lake City, UT

000 
WWUS75 KSLC 300549
NPWSLC

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1149 PM MDT TUE JUL 29 2008

...WIND STARTING TO DECREASE...

UTZ003>005-015-300700-
/O.EXP.KSLC.HW.W.0013.000000T0000Z-080730T0600Z/
SALT LAKE AND TOOELE VALLEYS-SOUTHERN WASATCH FRONT-
GREAT SALT LAKE DESERT AND MOUNTAINS-WEST CENTRAL UTAH-
1149 PM MDT TUE JUL 29 2008

...HIGH WIND WARNING WILL EXPIRE AT MIDNIGHT MDT TONIGHT...

THE HIGH WIND WARNING WILL EXPIRE AT MIDNIGHT MDT TONIGHT. 

STRONG GUSTY WINDS THAT OCCURRED IN THE NORTHWEST DESERTS
AND SALT FLATS CONTINUE TO DECREASE LATE THIS EVENING. WIND GUSTS
OF 50 TO 60 MPH OCCURRED EARLY THIS EVENING ACROSS MUCH OF THE
DESERTS.

STRONG GUSTY WINDS CONTINUE IN THE CENTRAL AND SOUTHERN WASATCH
FRONT BUT WILL DECREASE AFTER MIDNIGHT. HOWEVER...WINDY CONDITIONS
WILL STILL PERSIST THROUGH 2 AM WITH GUSTS OVER 35 MPH POSSIBLE.

WIND GUSTS OF 35 TO 45 MPH WERE COMMON IN THE SOUTHERN WASATCH
FRONT DURING THE EVENING HOURS...WITH LOCALLY UP TO AROUND 50 MPH IN
THE SALT LAKE AND TOOELE VALLEYS.

$$

UTZ002-300700-
/O.EXP.KSLC.WI.Y.0023.000000T0000Z-080730T0600Z/
NORTHERN WASATCH FRONT-
1149 PM MDT TUE JUL 29 2008

...WIND ADVISORY WILL EXPIRE AT MIDNIGHT MDT TONIGHT...

THE WIND ADVISORY WILL EXPIRE AT MIDNIGHT MDT TONIGHT. 

GUSTY WINDS WILL CONTINUE TO DECREASE AFTER MIDNIGHT.
EARLY THIS EVENING WIND GUSTS OF 30 TO 40 MPH AFFECT THE
NORTHERN WASATCH FRONT.

$$

TARDY

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
840 PM MDT TUE JUL 29 2008

.SYNOPSIS...A WEAK PACIFIC SYSTEM WILL CROSS NORTHERN UTAH OVERNIGHT.
A DRIER BUT VERY WARM SOUTHWESTERLY FLOW FOR WEDNESDAY THROUGH
FRIDAY. MOISTURE IS EXPECTED TO INCREASE IN THE SOUTH BY LATE FRIDAY
AND THEN SPREAD NORTHWARD FOR THE WEEKEND.

&&

.DISCUSSION...UPPER LEVEL TROUGH NOW ENTERING NORTHWEST UTAH
WITH A 70 KNOT 200 MB JET STREAK. INITIAL HIGH BASED CONVECTION
DURING THE LATE AFTERNOON AND EARLY EVENING PRODUCED A LARGE
OUTFLOW THAT SPREAD ACROSS THE DESERTS AND INTO THE WASATCH
FRONT. GUSTS TO 50 MPH WERE COMMON IN THE DESERTS WITH ISOLATED
SEVERE GUSTS AROUND 60 MPH BETWEEN ROSEBUD IN THEN NW CORNER
AND I-80. HAVE HANDLED THIS WITH A HIGH WIND WARNING UP TO
NOW. GUSTS OF 30 MPH AND UP TO NEAR 40 MPH REACHED INTO THE
WASATCH FRONT AS THE ASSOCIATED EXTENSIVE OUTFLOW SPREAD INTO
THIS REGION EARLY THIS EVENING. TO THE SOUTH...WIDELY SCATTERED
THUNDERSTORMS HAVE LINGERED OVER THE SEVIER PLATEAU TO LOA
AND CIRCLEVILLE AND ONE CELL PRODUCED A 57 MPH GUST IN RICHFIELD.
MOST AREAS OF UTAH DRIED SIGNIFICANTLY SINCE LAST NIGHT AS DRY AIR
ALOFT MIXED DOWN INTO THE BOUNDARY LAYER AND DROPPED DEWPOINTS INTO
THE 20S AND 30S. ISSUE FOR THE REST OF THE EVENING IS SYNOPTIC LIFT
ASSOCIATED WITH THE WAVE MOVING ACROSS CENTRAL AND NORTHERN UTAH
WHILE MOISTURE ADVECTION SPREADS INTO THE WASATCH FRONT. WHETHER
ENOUGH DESTABILIZATION OCCURS IN A DEEP LAYER TO KEEP THE CURRENT
LIGHTNING THAT IS ONGOING BETWEEN DUGWAY AND DELTA. THIS LIGHTNING
APPEARS TO BE ON THE OUTFLOW FROM EARLIER WEAK CONVECTION.

00Z NAM CONTINUES ITS TREND OF WEAKENING THE WEST CENTRAL UTAH
CONVECTION...WHILE THE LATEST RUC AND 18Z ARW HOLD IT TOGETHER BETTER
UNTIL IT REACHES THE WASATCH FRONT AND THEN WEAKENS. EITHER WAY
BOTH THE NAM AND GFS TRACK THE 500 MB OMEGA AND HIGHEST HUMIDITY
RIGHT ACROSS NORTHERN UTAH THROUGH MIDNIGHT AND THEN THE FAR
NORTHEAST CORNER JUST AFTER MIDNIGHT. WITH LOW HUMIDITY IN THE
BOUNDARY LAYER AND WIDESPREAD HIGH BASED CONVECTION THE THREAT FOR
STRONG WINDS WILL REMAIN IN THE DESERTS AND INTO PARTS OF THE
WASATCH FRONT THROUGH MIDNIGHT OR JUST AFTER. BOTH GFS AND RUC HAVE
UP TO 25 KNOTS AT 700 MB CROSSING THE FAR NORTH LATE THIS EVENING.
EXTENSIVE AREA OF COOLER CLOUD TOPS ARE DEPICTED ACROSS ALL OF
NORTHERN UTAH THIS EVENING WITH THE BROAD AREA OF LIFT OCCURRING IN
THIS REGION.

AFTER TONIGHT LIMITED MOISTURE LINGERS ACROSS UTAH AND THE AIR
MASS WARMS...BRINGING 18C 700 MB TEMPS UP TO I-80 BY THURSDAY
AND PERSISTING THROUGH SUNDAY. STEEP LAPSE RATES WILL ALLOW
FOR ISOLATED CONVECTION ON FAVORED SLOPES OF EASTERN UTAH.
POSITION OF THE UPPER HIGH LATE IN THE WEEK WILL LIKELY ALLOW
MOISTURE TO SPILL BACK INTO SOUTHERN UTAH BY FRIDAY AND THIS GETS
DRAW INTO STRONGER SOUTHWEST FLOW ACROSS FAR NORTHWEST UTAH. THIS
SHOULD ALLOW MOISTURE LEVELS TO INCREASE FROM SOUTH TO NORTH
AND INCREASE THUNDERSTORM ACTIVITY INTO THE WEEKEND AND LAST
INTO EARLY NEXT WEEK.

&&

.AVIATION...OLD OUTFLOW WILL CONTINUE TO WEAKEN BUT APPROACHING
HIGH BASED SHOWERS AND ISOLATED THUNDERSTORMS FROM THE SOUTHWEST
COULD BRING GUSTY SOUTHWEST WIND TO 35-40 MPH BETWEEN 9 PM AND
MIDNIGHT. MAINLY VFR CONDITIONS WITH A 10 PERCENT CHANCE OF
LIGHTNING LATE EVENING.

&&

.FIRE WEATHER...WIDESPREAD HUMIDITIES BELOW 15 PERCENT AND WIND
GUSTS OF 40 TO 60 MPH ACROSS NORTHWEST UTAH LATE THIS AFTERNOON AND
EARLY EVENING BROUGHT CRITICAL FIRE CONDITIONS. GUSTY WINDS CONTINUE
IN THIS REGION BUT HAVE WEAKENED AND HUMIDITIES HAVE RISEN TO
15 TO 20 PERCENT. HOWEVER A WEAK WEATHER DISTURBANCE IS TRACKING
THROUGH THE NORTHERN HALF OF UTAH AND BRINGING WIDESPREAD HIGH
BASED SHOWERS AND ISOLATED THUNDERSTORMS. LIGHTNING HAS BEEN MORE
NUMEROUS IN ZONE 434 OF WEST CENTRAL UTAH. ADDITIONAL OUTFLOW AND
RATHER LOW HUMIDITY HAS PROMPTED A RED FLAG WARNING FOR NORTHWEST
AREAS WHERE CONDITIONS WILL BE NEAR CRITICAL THROUGH THE EVENING
AND THE POTENTIAL FOR CLOUD TO GROUND LIGHTNING STRIKES EXIST.

IN THE SOUTH ISOLATED THUNDERSTORMS WILL CONTINUE WITH SLIGHTLY
MORE MOISTURE IN PLACE ACROSS SOUTH CENTRAL UTAH THIS EVENING.
HOWEVER THIS REGION HAS ALSO EXPERIENCED CONSIDERABLE DRYING
IN THE LOW LEVELS.

A DRIER AND MORE STABLE AIRMASS IS EXPECTED TO SPREAD ACROSS THE
REGION FOR THE MIDDLE TO LATTER PORTION OF THE WEEK. ISOLATED
THUNDERSTORMS FOR FAVORED EASTERN AND SOUTHERN AREAS WILL INCREASE
THURSDAY AND FRIDAY. HOT TEMPERATURES AND LOW HUMIDITY FOR MUCH
OF THE REGION. 10 TO 15 KNOTS AT 700 MB AND VERY LOW HUMIDITY
WILL BRING LOCAL NEAR CRITICAL CONDITIONS TO WESTERN AND SOUTHWEST
AREAS THURSDAY AND FRIDAY. DEEPER MOISTURE WILL SPREAD INTO THE
REGION STARTING SATURDAY.

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...HIGH WIND WARNING AND RED FLAG WARNING FOR UTZ005-015 UNTIL
     MIDNIGHT TO 2 AM.
     RED FLAG WARNING FOR UTZ002>004 UNTIL 2 AM FOR GUSTY WINDS
     AND LIGHTNING.
WY...NONE.

&&

TARDY

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
711 PM MDT TUE JUL 29 2008

UTZ005-015-310115-
GREAT SALT LAKE DESERT AND MOUNTAINS-WEST CENTRAL UTAH-
711 PM MDT TUE JUL 29 2008

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

.DAY ONE...TONIGHT
STRONG WINDS WILL OCCUR ACROSS THE NORTHWEST DESERTS OF UTAH AS A
WEATHER DISTURBANCE AND SCATTERED SHOWERS AND ISOLATED
THUNDERSTORMS MOVE THROUGH THE REGION. GUSTY WINDS WILL ALSO
SPREAD ACROSS THE WASATCH FRONT.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

DRIER AND HOT CONDITIONS ARE EXPECTED WEDNESDAY THROUGH
FRIDAY. ONLY ISOLATED THUNDERSTORMS WILL OCCUR ACROSS EASTERN
AND SOUTHERN UTAH. MOISTURE MAY RETURN DURING THE WEEKEND WHICH
COULD INCREASE THUNDERSTORM COVERAGE.

.SPOTTER INFORMATION STATEMENT...
WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER ACCORDING
TO STANDARD OPERATING PROCEDURES.

TARDY

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

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
454 PM MDT TUE JUL 29 2008

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0420 PM     NON-TSTM WND GST 10 W KNOLLS             40.73N 113.47W
07/29/2008  M63.00 MPH       TOOELE             UT   MESONET

            DUGWAY I-80. PEAK GUSTS 64 MPH.

0440 PM     NON-TSTM WND GST 17 ESE GROUSE CR        41.61N 113.59W
07/29/2008  M58.00 MPH       BOX ELDER          UT   MESONET

            ROSEBUD RAWS

&&

ATARDY