Severe Thunderstorm Warning 1, NWS Salt Lake City, UT

517 
WWUS55 KSLC 270222
SVSSLC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
822 PM MDT THU APR 26 2012

UTC003-011-057-270232-
/O.EXP.KSLC.SV.W.0001.000000T0000Z-120427T0230Z/
BOX ELDER UT-WEBER UT-DAVIS UT-
822 PM MDT THU APR 26 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL DAVIS...CENTRAL
WEBER AND EAST CENTRAL BOX ELDER COUNTIES WILL EXPIRE AT 830 PM
MDT...

THE STORMS HAVE WEAKENED AND ARE NO LONGER SEVERE. THEREFORE THE 
WARNING HAS BEEN ALLOWED TO EXPIRE.

LAT...LON 4150 11191 4149 11187 4146 11191 4139 11186
      4099 11193 4102 11220 4154 11213 4155 11194
TIME...MOT...LOC 0222Z 205DEG 26KT 4134 11196

$$

PW

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
415 PM MDT THU APR 26 2012

.SYNOPSIS...A STRONG COLD FRONT WILL SWEEP ACROSS MUCH OF UTAH
TONIGHT THROUGH EARLY FRIDAY. SUBSTANTIALLY COLDER AIR WILL FOLLOW
THE COLD FRONT...AND REMAIN IN PLACE HEADING INTO THE WEEKEND.

&&

.DISCUSSION...THE SURFACE COLD FRONT CURRENTLY OVER EXTREME
NORTHEAST NEVADA STILL ON TRACK TO SWEEP ACROSS NORTHWEST UTAH
LATE THIS AFTERNOON/EARLY THIS EVENING. LOOKING AT A RATHER
ENERGETIC FRONT MOVING THROUGH THE WASATCH FRONT BASED ON THE
STRONG FGEN INDICATED IN THE MODELS. WILL PUT HIGH POPS IN
CONVECTION FOR THE NORTHWEST ZONES THIS EVENING...WITH A BRIEF
PERIOD OF INTENSE PRECIP ALONG THE COLD FRONT. SNOW LEVELS WILL
DROP QUICKLY BEHIND THE FRONT...RAIN/SNOW OR SNOW POSSIBLE IN THE
HIGHER VALLEYS OR BENCH AREAS. THIS LOOKS TO BE A LOW IMPACT EVENT
IN THE VALLEYS AS GROUND SURFACES ARE QUITE WARM. ACCUMULATING
SNOWS WITH HIGH SNOWFALL RATES ARE EXPECTED IN THE MOUNTAINS THIS
EVENING...WITH THESE RATES DROPPING OFF QUICKLY AS THE FRONT
PUSHES OFF TO THE EAST AND WEAKENS LATER IN THE EVENING.

THE UPPER TROUGH DRIVING THIS EVENINGS COLD FRONT WILL TRACK EAST
THROUGH THE NORTHERN ROCKIES LATE TONIGHT/FRIDAY...THEN CLOSE OFF
ACROSS THE NORTHERN PLAINS/NORTHERN ROCKIES FRIDAY NIGHT/SATURDAY.
THIS CLOSING OFF AND STALLING OF THE LOW TO THE NORTHEAST WILL LEAVE
NORTHERN UTAH ON THE EDGE OF WHAT COULD BE SIGNIFICANT PRECIP
FRIDAY NIGHT/SATURDAY. THE GFS REMAINS THE MODEL THAT OFFERS THE
BEST THREAT BY KEEPING MOISTURE AND COLD AIR ALOFT ACROSS FAR
NORTHERN UTAH. THE ECMWF AND NAM BOTH MOVE THIS SAME COLD AIR TO
THE NORTH AND EAST CLOSER TO THE UPPER LOW AND OUT OF UTAH.
INCLINED AT THIS POINT TO FOLLOW THE ECMWF SOLUTION AND MINIMIZE
THE THREAT FOR SHOWERS HEADING INTO THE WEEKEND. WILL OFFER A
LOW-END THREAT FOR ORGANIZED SHOWERS LATER ON SATURDAY AS THE
VARIOUS MODEL GUIDANCE DO INDICATED A VORTICITY LOBE ROTATING
SOUTH AROUND THE UPPER LOW AND ACROSS EASTERN IDAHO/NORTHERN UTAH
LATE SATURDAY.

WARMER AND GENERALLY DRIER CONDITIONS SHOULD RETURN EARLY NEXT
WEEK AS A LOW-AMPLITUDE CYCLONIC WESTERLY FLOW DEVELOPS ACROSS THE
NORTHERN ROCKIES/NORTHERN GREAT BASIN. FAR NORTHERN UTAH COULD BE
OPEN TO PASSING SHORTWAVES GENERATING LIGHT PRECIP...OTHERWISE
CONDITIONS WILL BE DRY OVER THE REMAINDER OF THE STATE. TEMPS WILL
CLIMB BACK TO SEASONAL OR HIGHER READINGS EARLY IN THE WEEK...WITH
TEMPS JUMPING FURTHER LATE IN THE WEEK AS WEAK HIGH PRESSURE ALOFT
SETTLES OVER THE REGION.

&&

.AVIATION...VFR CONDITIONS LATE THIS AFTERNOON WILL DETERIORATE
RAPIDLY BETWEEN 00-02Z AS A COLD FRONT SWEEPS THROUGH THE NORTHERN
WASATCH FRONT. PREVAILING SOUTHERLY WINDS OF 15 TO 25 KTS WITH
GUSTS NEAR 30 KT WILL TURN TO THE WEST AND REMAIN STRONG WITH THE
COLD FRONTAL PASSAGE AROUND 01-02Z. CEILINGS WILL LOWER QUICKLY
WITH THE COLD FRONT WITH MVFR/IFR CONDITIONS EXPECTED IN THE BURST
OF HEAVY PRECIP WITH THE FRONT. THUNDERSTORMS ARE ALSO EXPECTED
ALONG THE COLD FRONT. CEILINGS BETWEEN 3-4 KFT WILL PERSIST
THROUGH 06-07Z...THEN SLOWLY RISE TO NEAR 6 KFT AS PRECIP
DECREASES AT THE TERMINAL. NORTHWEST WINDS WILL DROP OFF AFTER
08Z.

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...WIND ADVISORY FROM 7 PM THIS EVENING TO 2 AM MDT FRIDAY FOR
     UTZ005.

WY...NONE.
&&

PUBLIC...CONGER
AVIATION...YOUNG

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
742 PM MDT THU APR 26 2012

UTZ001>016-019>021-517-518-WYZ021-271300-
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-
742 PM MDT THU APR 26 2012

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

.DAY ONE...TONIGHT

THE SPRING SNOW MELT IS UNDERWAY...AND WITH RECENT RECORD
TEMPERATURES ACCELERATING THE SNOW MELT...SWIFT MOVING COLD WATER
IS RISING IN WATERWAYS ACROSS THE OUTLOOK AREA. REMEMBER TO KEEP
CHILDREN AND PETS AT A SAFE DISTANCE FROM WATERWAYS AS THESE
WATERS CAN BE VERY DANGEROUS.

A COLD FRONT WILL BRING STRONG WINDS TO NORTHWEST UTAH DURING THE
EVENING ALONG WITH RAIN AND THUNDERSTORMS LASTING INTO TONIGHT.
THE RAIN MAY BE HEAVY AT TIMES WITH LOCAL PONDING OF WATER IN
STREETS AND INTERSECTIONS ALONG THE WASATCH FRONT.

HEAVY WET SNOW WILL ACCUMULATE ACROSS THE NORTHERN OUTLOOK AREA
ABOVE ABOUT 6000 FEET AND COULD BRIEFLY IMPACT TRAVEL OVER THE
HIGHER SUMMITS THROUGH THE NORTHERN MOUNTAINS...INCLUDING PARLEYS
SUMMIT ON I-80.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

TEMPERATURES FRIDAY INTO THE WEEKEND WILL BE NEAR OR BELOW SEASONAL
NORMALS AND WILL FEEL QUITE CHILLY COMPARED TO READINGS FROM
EARLIER IN THE WEEK. SNOW LEVELS WILL REMAIN NEAR OR LOCALLY BELOW
6000 FEET FRIDAY MORNING. SOME ADDITIONAL SNOW ACCUMULATION IS
POSSIBLE EARLY FRIDAY MORNING WITH ROAD SLUSH OR LOCAL ROAD SNOW
ACROSS THE SUMMITS.

A HARD FREEZE IS POSSIBLE FOR THE COLDER VALLEYS OF FAR NORTHERN
UTAH SATURDAY MORNING.

COOL WEATHER IS EXPECTED TO CONTINUE THROUGH THE WEEKEND.

.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)

FOR INFORMATION ON POTENTIAL TRAVEL IMPACTS VISIT...
HTTP://WWW.COMMUTERLINK.UTAH.GOV/ROADWEATHERFORECAST.ASPX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
704 PM MDT THU APR 26 2012

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

0625 PM     NON-TSTM WND GST WENDOVER                40.74N 114.02W
04/26/2012  M75.00 MPH       TOOELE             UT   MESONET

            UDOT I-80 MP 1

0635 PM     NON-TSTM WND GST WENDOVER                40.74N 114.02W
04/26/2012  M67.00 MPH       TOOELE             UT   AWOS

            WENDOVER AIRPORT KENV

0655 PM     NON-TSTM WND GST 25 NW DELLE             41.03N 113.12W
04/26/2012  M62.00 MPH       BOX ELDER          UT   MESONET

            DIDDLE KNOLL

&&

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
712 PM MDT THU APR 26 2012

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

0650 PM     NON-TSTM WND GST 3 SW CURLEW JCT         41.94N 113.08W
04/26/2012  M71.00 MPH       BOX ELDER          UT   MESONET

            UDOT CURLEW

0700 PM     NON-TSTM WND GST 15 NNE KNOLLS           40.91N 113.15W
04/26/2012  M73.00 MPH       TOOELE             UT   MESONET

            DIDDLE KNOLL

&&