A Pacific storm system moved into the Great Basin on September 24 and 25, producing strong prefrontal winds in Utah's northwest desert.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS SLC wrote it up.
A Pacific storm system moved into the Great Basin on September 24 and 25, producing strong prefrontal winds in Utah's northwest desert.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Salt Lake City, UT wrote its last area forecast discussion before the first event at Sep 24, 3:25 PM MST, 3 hours 50 minutes earlier.
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
425 PM MDT TUE SEP 24 2013
.SYNOPSIS....A WARM SOUTHWEST FLOW WILL CONTINUE ACROSS UTAH THIS
EVENING. A COLD PACIFIC STORM SYSTEM WILL IMPACT THE GREAT BASIN
BEGINNING TONIGHT...AND LAST THROUGH THE END OF THE WORK WEEK.
HIGH PRESSURE ALOFT WILL RETURN FOR THE UPCOMING WEEKEND AND EARLY
NEXT WEEK.
&&
.DISCUSSION...WARM CONDITIONS AND GUSTY SOUTH WINDS ARE IN PLACE
ACROSS MUCH OF UTAH AND SOUTHWEST WYOMING THIS AFTERNOON...OUT
AHEAD OF A PACIFIC TROUGH MOVING INTO THE GREAT BASIN. THIS TROUGH
IS RIGHT ON OUR DOORSTEP...WITH LIGHT PRECIP ALREADY ALONG THE
UTAH/IDAHO BORDER. WHILE SHOWERS SHOULD BEGIN TO FILL IN A BIT IN
FAR NORTHERN UTAH OVERNIGHT...IT WILL TAKE A SECONDARY SHORTWAVE
TO HELP PUSH THE COLD FRONT THROUGH THE NORTHERN HALF OF THE
FORECAST AREA IN EARNEST LATE MORNING THROUGH AFTERNOON TOMORROW.
CONTINUED TO INCREASE POPS ACROSS THE NORTHERN PORTIONS OF THE CWA
AS THE FRONTAL BOUNDARY PUSHES INTO THE NORTH TOMORROW. EVEN
THOUGH THE NAM PRODUCES LITTLE QPF AND INSTABILITY...THINK THAT
THE BAROCLINIC ZONE IS STRONG ENOUGH THAT AT LEAST SOME LIGHT
PRECIPITATION SHOULD FALL IN MOST LOCATIONS THAT THE FRONT GOES
THROUGH. OUT AHEAD OF THE FRONT...WINDS CONTINUE TO LOOK
STRONG...PARTICULARLY IN SOUTHEASTERN UTAH. HAVE ISSUED A WIND
ADVISORY FOR PORTIONS OF SOUTH CENTRAL AND SOUTHEAST UTAH FOR
TOMORROW...AND THERE IS A CHANCE ADVISORIES WILL NEED TO BE
EXTENDED INTO SOUTHWESTERN UTAH AS WELL.
THE FRONTAL ZONE LINGERS ACROSS THE NORTHERN PORTIONS OF THE CWA
ON THURSDAY...BEFORE A THIRD AND FINAL WAVE PUSHES THE BULK OF THE
UPPER TROUGH OVER THE AREA THURSDAY NIGHT INTO FRIDAY. MODELS HAVE
TRENDED COLDER WITH THIS INCOMING AIRMASS...WITH 700MB
TEMPERATURES EXPECTED TO DROP TO -6 DEGREES CELSIUS BY 12Z FRIDAY.
HAVE CONTINUED TO LOWER TEMPS AND SNOW LEVELS...AND CURRENTLY
HAVE SNOW LEVELS DROPPING TO 6000FT FRIDAY MORNING...WITH
RAIN/SNOW MIX POSSIBLE BELOW THAT LEVEL.
THOSE COLDER LOW LEVEL TEMPERATURES ALSO BRING TO MIND THE
POSSIBILITY OF LAKE EFFECT PRECIPITATION...EVEN THOUGH LAKE EFFECT
IS FAIRLY HARD TO GET IN SEPTEMBER. LOOKING AT THE PARAMETERS OF A
LOCAL LAKE EFFECT STUDY...CURRENT MODEL SOLUTIONS WOULD PUT THE
CHANCE OF A LAKE EFFECT BAND DEVELOPING FRIDAY MORNING AT ABOUT
50-60 PERCENT. FOR NOW...HAVE KEPT POPS ELEVATED THROUGH THE
FRIDAY MORNING HOURS IN THE SALT LAKE AND TOOELE VALLEYS TO
ACCOUNT FOR THIS POSSIBILITY.
THE TROUGH FINALLY EXITS FRIDAY NIGHT INTO SATURDAY...WITH ZONAL
FLOW OR WEAK SHORTWAVE RIDGING BUILDING IN BEHIND IT FOR THE REST
OF THE WEEKEND AND INTO THE BEGINNING OF NEXT WEEK. HAVE MADE
SATURDAY MORNING THE COLDEST MORNING IN THE 7 DAY FORECAST...AT
LEAST IN THE VALLEY LOCATIONS. EVEN THOUGH THE TROUGH HAS LEFT
AND TEMPERATURES ALOFT BEGIN TO WARM...SATURDAY MORNING IS THE
FIRST TIME AFTER TOMORROWS COLD FRONT THAT SKIES SHOULD TRULY
CLEAR...AND EXPECT TEMPS TO PLUMMET APPROPRIATELY. AFTER
THAT...HAVE SIMPLY KEPT THE SLOW BUT STEADY WARMING TREND IN THE
FORECAST...WITH CONSIDERATION GIVEN TO THE FACT THAT THOROUGH
MIXING DUE TO SOLAR RADIATION WILL BE HARDER TO COME BY AS WE GET
INTO THE BEGINNING OF OCTOBER.
&&
.AVIATION...SOUTHERLY WINDS WILL CONTINUE AT THE SLC TERMINAL
THROUGHOUT THE AFTERNOON AND INTO EVENING...WITH GUSTS DIMINISHING
BETWEEN 02-03Z. THERE IS A 30 PERCENT CHANCE WINDS WILL BECOME WEST
TO WEST NORTHWEST FROM PRECIPITATION OUTFLOW BETWEEN 22-02Z. VFR
CONDITIONS SHOULD PREVAIL FOR THE SLC TERMINAL THROUGH THE EVENING
AND EARLY MORNING HOURS.
&&
.FIRE WEATHER...DRY AND WINDY CONDITIONS WILL CONTINUE THROUGH THIS
EVENING AHEAD OF AN APPROACHING STORM SYSTEM. THE ASSOCIATED COLD
FRONT WILL PUSH ACROSS NORTHWEST UTAH TOMORROW MORNING...THEN STALL
OVER CENTRAL UTAH TOMORROW EVENING. A SECOND COLDER WAVE WILL THEN
PUSH THE FRONT THROUGH THE REMAINDER OF THE FIRE DISTRICT ON
THURSDAY. STRONG GUSTY SOUTHWEST WINDS WILL CONTINUE TOMORROW
AFTERNOON AND AGAIN THURSDAY AFTERNOON ACROSS THE SOUTHEAST AHEAD OF
THE FRONT. MEANWHILE...A MUCH COLDER AND MOIST AIRMASS WILL ENTER
THE AREA BEHIND THE FRONT. EXPECT PRECIPITATION TO DEVELOP BEHIND
THE FRONT...WITH THE BULK OF IT FALLING ACROSS THE NORTHERN THIRD OF
THE FIRE DISTRICT. SNOW LEVELS WILL FALL TO AROUND 8000FT LATE
WEDNESDAY ACROSS NORTHERN UTAH...THEN CONTINUE TO LOWER ON THURSDAY
BEFORE BOTTOMING OUT AROUND 6000FT THURSDAY NIGHT INTO FRIDAY
MORNING. DRY...STABLE AND WARMER CONDITIONS WILL RETURN OVER THE
WEEKEND AND INTO THE FIRST HALF OF NEXT WEEK.
&&
.SLC WATCHES/WARNINGS/ADVISORIES...
UT...WIND ADVISORY FROM NOON TO 10 PM MDT WEDNESDAY FOR
UTZ013-020-021.
WY...NONE.
&&
PUBLIC...SCHOENING
FIRE WEATHER...CHENG
AVIATION...VERZELLA
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...CORRECTED NATIONAL WEATHER SERVICE SALT LAKE CITY UT 455 PM MDT TUE SEP 24 2013 UTZ001>016-019>021-517-518-WYZ021-251200- 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- 455 PM MDT TUE SEP 24 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN TWO THIRDS OF UTAH AND SOUTHWEST WYOMING. .DAY ONE...TONIGHT GUSTY SOUTHERLY WINDS WILL EXIST AHEAD OF THE COLD FRONT SETTLING INTO EXTREME NORTHWEST UTAH THIS EVENING. TEMPERATURES WILL REMAIN MILD WHERE THE WINDS REMAIN GUSTY...ESPECIALLY ACROSS THE WEST CENTRAL AND SOUTHWEST VALLEYS. SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS WILL DEVELOP DURING THE EVENING ALONG AND BEHIND THE COLD FRONT. GENERALLY LIGHT PRECIPITATION AMOUNTS ARE EXPECTED. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY STRONG SOUTHERLY WINDS WILL CONTINUE SOUTH OF THE COLD FRONT ACROSS SOUTHERN UTAH WEDNESDAY. WINDS WILL BE ESPECIALLY STRONG DURING THE AFTERNOON ACROSS EXTREME SOUTHERN UTAH. A WIND ADVISORY HAS BEEN ISSUED FOR THE SOUTH CENTRAL AND SOUTHEAST PORTIONS OF UTAH FROM NOON UNTIL 1000 PM WEDNESDAY EVENING. BEHIND THE COLD FRONT WIDESPREAD RAIN WILL EXIST WEDNESDAY THROUGH WEDNESDAY NIGHT. LOWERING SNOW LEVELS WILL BRING SNOW TO THE HIGHER ELEVATIONS OF THE NORTH WEDNESDAY AFTERNOON. SNOW LEVELS WILL CONTINUE TO FALL WEDNESDAY NIGHT AND THURSDAY...BRINGING THE THREAT OF SNOW DOWN AS LOW AS 6500 TO 7000 FEET. ACCUMULATING SNOW ABOVE 7500 FEET ARE EXPECTED ACROSS THE NORTHERN MOUNTAINS. BELOW TO MUCH BELOW NORMAL TEMPERATURES ARE EXPECTED THROUGH THE END OF THE WEEK. THE FIRST FROST OF THE SEASON IS POSSIBLE FOR MANY AREAS OTHER THAN EXTREME SOUTHERN UTAH BY SATURDAY MORNING. HIGH PRESSURE ALOFT OVER THE WEEKEND WILL MAINTAIN DRY CONDITIONS AND ALLOW TEMPERATURES TO CLIMB BACK TO AROUND SEASONAL NORMS. .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.UDOTTRAFFIC.UTAH.GOV/ROADWEATHERFORECAST.ASPX
1 high wind. Local standard time, as filed.
Peak wind gusts across the Dugway Proving Ground mesonet included 60 mph at the Causeway sensor, and 58 mph at both the North Salt Flats and Callao sensors.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Utah in 2013Every state in 2013This day in weather historyWarnings in Utah, September 2013
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 476520.