Severe Thunderstorm Warning 34, NWS Salt Lake City, UT

000 
WWUS55 KSLC 172002
SVSSLC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
201 PM MDT MON JUL 17 2006

UTC025-053-172015-
/O.CON.KSLC.SV.W.0034.000000T0000Z-060717T2015Z/
WASHINGTON UT-KANE UT-
201 PM MDT MON JUL 17 2006

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 215 PM MDT
FOR WEST CENTRAL KANE AND EAST CENTRAL WASHINGTON COUNTIES...

AT 156 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR ZION NP...OR ABOUT 23 MILES NORTHWEST OF KANAB...MOVING
SOUTHWEST AT 10 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  ZION NP BY 210 PM MDT
  SPRINGDALE BY 215 PM MDT

LAT...LON 3732 11273 3745 11289 3725 11316 3708 11293

$$

HALL

000 
WWUS55 KSLC 172012
SVSSLC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
211 PM MDT MON JUL 17 2006

UTC025-053-172021-
/O.EXP.KSLC.SV.W.0034.000000T0000Z-060717T2015Z/
WASHINGTON UT-KANE UT-
211 PM MDT MON JUL 17 2006

...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL KANE AND EAST
CENTRAL WASHINGTON COUNTIES EXPIRES AT 215 PM MDT...

THE THUNDERSTORM THAT WAS SEVERE HAS WEAKENED OVER THE AREA AND THE 
SEVERE THUNDERSTORM WARNING HAS BEEN ALLOWED TO EXPIRE.

LAT...LON 3732 11273 3745 11289 3725 11316 3708 11293

$$

HALL

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1046 AM MDT MON JUL 17 2006

.SYNOPSIS...NEAR-RECORD HEAT WILL CONTINUE OVER THE AREA TODAY AND
ABOVE-NORMAL TEMPERATURES WILL PERSIST THROUGHOUT THE WEEK AS HIGH
PRESSURE REMAINS IN PLACE OVER THE INTERMOUNTAIN REGION. MOISTURE
WILL SLOWLY INCREASE THROUGH MIDWEEK.

&&

.DISCUSSION...NEAR RECORD HEAT CONTINUES AS A RIDGE OF HIGH
PRESSURE REMAINS OVER THE AREA. 700 MB TEMPERATURES WERE AT 18
DEGREES CELSIUS ON THIS MORNINGS SOUNDING. NAM AND GFS INITIALIZED
12Z TEMPERATURES AT 700 MB IN GOOD AGREEMENT WITH THIS MORNINGS
SOUNDING. AREA FOR THE MOST PART IS RUNNING SLIGHTLY WARMER THAN
YESTERDAY. CLOUDINESS MAY BE FACTOR IN HOW MUCH WARMING ACTUALLY
OCCURS. WHILE GFS WARMS 700 MB TEMPERATURES AT LEAST 2 DEGREES
CELSIUS AND NAM WARMS 700 MB TEMPERATURES 1-2 DEGREES
CELSIUS...NAM BUFR DATA IS BRINGING A BIT MORE MOISTURE OVER THE
AREA THAN WHAT WAS PREVIOUSLY EXPECTED. NAM BUFR DATA DID NOT
EXPECT ANY CLOUDS YESTERDAY FOR TODAY...BUT HAS A FAIR AMOUNT OF
MID-LEVEL MOISTURE OVER THE AREA. TODAY MIGHT BE A REPLAY OF
SATURDAY FOR THE AREA...CLOUDS STARTED DEVELOPING OVER THE AREA
WHEN RECORD HEATING WAS APPROACHED FOR THE DAY. BUT TODAY HAS MORE
MOISTURE OVER THE AREA MOVING OVER THE AREA THAN SATURDAY...SO
LEANING ON THE COOL SIDE OF THE CURRENT FORECAST TEMPERATURES MAY
BE AN OK IDEA.

700 MB TEMPERATURES WARM OVER NORTHERN UTAH TUESDAY AND COOL OVER
SOUTHERN UTAH. WITH MIXING RATIOS NEARING 4-6 G/KG OVER NORTHERN
UTAH BY THE AFTERNOON...MOISTURE MAY WIN OUT THE BATTLE VERSUS
HEATING. WITH MOISTURE INCREASING RAPIDLY OVER THE AREA...MAX
TEMPERATURES OVER NORTHERN UTAH SHOULD REMAIN THE SAME AS TODAY OR
BE SLIGHTLY COOLER AS CLOUDINESS WILL INHIBIT FURTHER WARMING. IN
ADDITION...NAM AND GFS HAVE VORT MAX MOVING OVER NORTHERN UTAH IN
THE AFTERNOON. FLASH FLOOD ISSUES COULD DEVELOP OVER SOUTHERN UTAH
AS MIXING RATIOS EXCEED 8 G/KG AND LIGHT STEERING FLOW REMAIN
ALOFT BENEATH THE RIDGE.

DRYING BEGIN FOR LATE WEEK AS RIDGE REDEVELOPS WEST OF THE AREA
AND WARMING BEGINS ONCE AGAIN. LATEST 12Z GFS RUN IS RETROGRADING
A CANADIAN TROUGH FURTHER WEST THAN PREVIOUSLY THOUGHT. IT IS
INTERESTING TO NOTE THAT BOTH THE ECMWF AND GFS PICKED UP ON THIS
IDEA EARLIER...BUT BOTH MODELS WENT AWAY FROM IT AND NOW ARE
COMING BACK TO THE IDEA. FORECAST WILL LIKELY TREND COOLER FOR
NEXT WEEKEND...BUT POPS WILL PROBABLY REMAIN UNCHANGED.

&&

.AVIATION...LAKE-LAND BREEZE CIRCULATION SHOULD BEHAVE TO NEAR
CLIMATOLOGICAL REGIMES.

&&

.FIRE WEATHER...WITH INCREASING MID LEVEL MOISTURE AND DECREASING
STABILITY ACROSS SOUTHERN UTAH TODAY ANTICIPATE AN INCREASE IN
THE AREAL COVERAGE OF THUNDERSTORMS. WITH VERY DRY LOW LEVELS
STILL IN PLACE THERE IS THE THREAT FOR DRY THUNDERSTORMS. STRONG
GUSTY WINDS ARE POSSIBLE IN THE VICINITY OF ANY THUNDERSTORMS OR
AREAS OF VIRGA THIS AFTERNOON AND EVENING. RED FLAG WARNING
REMAINS IN EFFECT UNTIL 10 PM THIS EVENING FOR FIRE WX ZONES
425...437...439...AND 440. MINIMUM RELATIVE HUMIDITIES WILL FALL
TO CRITICAL LEVELS ACROSS MUCH OF THE STATE THIS AFTERNOON WITH
POOR RECOVERIES TONIGHT. DEEPER MOISTURE WILL SPREAD NORTH INTO
UTAH ON TUESDAY DECREASING THE THREAT OF DRY THUNDERSTORMS ACROSS
THE SOUTH AND SPREADING ISOLATED STORMS INTO NORTHERN UTAH BY
TUESDAY EVENING.

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...HEAT ADVISORY UNTIL 6 AM TUESDAY FOR UTZ019-021.

     RED FLAG WARNING UNTIL 10 PM MONDAY FOR UTZ435-437-439-440.

WY...NONE.

&&

PUBLIC/AVIATION...HALL
FIRE WEATHER...GRAHAM

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
441 AM MDT MON JUL 17 2006

UTZ001>021-WYZ021-181200-
CACHE VALLEY/UTAH PORTION-CASTLE COUNTRY-
CENTRAL AND SOUTHWEST MOUNTAINS-
GLEN CANYON RECREATION AREA/LAKE POWELL-
GREAT SALT LAKE DESERT AND MOUNTAINS-HENRY MOUNTAINS-
NORTHERN WASATCH FRONT-SALT LAKE AND TOOELE VALLEYS-SAN RAFAEL SWELL-
SANPETE/SEVIER VALLEYS-SOUTH CENTRAL UTAH-SOUTHERN WASATCH FRONT-
SOUTHWEST UTAH-SOUTHWEST WYOMING-UTAHS DIXIE AND ZION NATIONAL PARK-
WASATCH MOUNTAIN VALLEYS-WASATCH MOUNTAINS I-80 NORTH-
WASATCH MOUNTAINS SOUTH OF I-80-WASATCH PLATEAU/BOOK CLIFFS-
WEST CENTRAL UTAH-WESTERN UINTA BASIN-WESTERN UINTA MOUNTAINS-
441 AM MDT MON JUL 17 2006

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

.DAY ONE...TODAY AND TONIGHT

VERY HOT TEMPERATURES WILL OCCUR TODAY WITH MANY LOCATIONS
REACHING OR EXCEEDING RECORD HIGHS. THESE EXTREME TEMPERATURES
CAN CAUSE HEAT RELATED ILLNESSES WITH PROLONGED EXPOSURE TO SUNSHINE
AND IN COMBINATION WITH VERY WARM TEMPERATURES AT NIGHT GIVING
LITTLE RELIEF. HEAT ADVISORIES ARE IN EFFECT FOR PARTS OF SOUTHERN
UTAH. NEVER LEAVE PETS OR CHILDREN IN VEHICLES FOR ANY AMOUNT OF
TIME.

ISOLATED THUNDERSTORMS WILL OCCUR OVER THE WASATCH PLATEAU AND UINTA
MOUNTAINS...WITH SCATTERED THUNDERSTORMS ACROSS SOUTHERN UTAH. REFER
TO FIRE WEATHER PRODUCTS FOR DETAILS ON THE HAZARDOUS FIRE WEATHER
CONDITIONS TODAY.

.DAYS TWO THROUGH SEVEN... TUESDAY THROUGH SUNDAY

HOT TEMPERATURES WILL CONTINUE ON TUESDAY WITH MOISTURE INCREASING
FROM THE SOUTH. THUNDERSTORMS COVERAGE WILL EXPAND ON TUESDAY AND
WEDNESDAY. TEMPERATURES WILL NOT BE AS HOT WEDNESDAY THROUGH SUNDAY
BUT STILL ABOVE NORMAL. SCATTERED THUNDERSTORMS WILL BECOME WETTER
TUESDAY AND WEDNESDAY BUT STILL MAY BRING HAZARDOUS FIRE
WEATHER CONDITIONS. THE THREAT FOR LOCALIZED FLASH FLOODING
INCREASES DURING THIS WEEK.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS ARE REQUESTED TO REPORT ANY SIGNIFICANT WEATHER ACCORDING
TO STANDARD OPERATING PROCEDURES.

$$TARDY