Thunderstorms across Utah became moister beginning July 4, and two separate flash floods occurred in Zion National Park over a three day period.
Every event with a place to put it. Tap one for its entry below.
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.
Thunderstorms across Utah became moister beginning July 4, and two separate flash floods occurred in Zion National Park over a three day period.
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 Jul 4, 3:04 PM MST, 4 hours 16 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SALT LAKE CITY UT 404 PM MDT FRI JUL 4 2014 .SYNOPSIS...HIGH PRESSURE ALOFT CENTERED OVER THE INTERIOR WEST WILL REMAIN THE DOMINANT FEATURE THROUGH THE UPCOMING HOLIDAY WEEKEND AND INTO EARLY NEXT WEEK. MOISTURE WILL INCREASE ACROSS SOUTHERN UTAH OVER THE WEEKEND INTO EARLY NEXT WEEK...WHILE A DRIER AIRMASS REMAINS IN PLACE ACROSS THE NORTH. && .DISCUSSION...THE AXIS OF A STRONG MID LEVEL RIDGE CONTINUES TO GRADUALLY SHIFT NORTH THIS AFTERNOON WITH CURRENT PLACEMENT OVER SOUTHERN UTAH. SCATTERED CONVECTION HAS FORMED ALONG AND SOUTH OF THIS AXIS...MAINLY OVER THE TERRAIN...AND SOME ISOLATED HEAVY RAINERS HAVE BEEN NOTED AS STORM MOTION REMAINS NEAR NIL DUE TO WEAK FLOW ALOFT. OVER THE NEXT 24 HOURS THIS AXIS LOOKS TO SHIFT JUST NORTH OF INTERSTATE 70...AND WILL MAINTAIN A STRONG DELINEATION BETWEEN DRYER MORE STABLE CONDITIONS TO THE NORTH AND MUCH DEEPER MOISTURE TO THE SOUTH. 1 INCH PWAT HAS NOSED INTO FAR SOUTHERN UTAH TODAY AND IS PROGGED TO INCREASE ONE TO TWO MORE TENTHS OVER THE NEXT 24 HOURS OWING TO AN INCREASED THREAT OF LOCALLY HEAVY RAINFALL AND FLASH FLOODING IN PRONE TERRAIN ACROSS THE SOUTH. GUIDANCE NOW IN GENERAL AGREEMENT THAT ONCE THIS AXIS SETTLES OVER CENTRAL UTAH COME SUNDAY IT WILL MOVE LITTLE THROUGH EARLY NEXT WEEK. THE 12Z NAM DID SUGGEST A NORTHWARD SURGE OF 1 INCH PWAT ALL THE WAY INTO THE NORTH SUNDAY...BUT THIS IDEA NO LONGER EXISTS IN THE 18Z RUN AND NOW MATCHES THOSE PORTRAYED IN THE GLOBAL MODELS. THUS...AREAS ALONG AND SOUTH OF THE AXIS WILL SEE A DAILY DOSE OF SHOWERS AND STORMS...AND A FAIRLY STEADY INCREASE TO LOW LEVEL MOISTURE/DEWPOINTS OWING TO AN INCREASING THREAT OF LOCALLY HEAVY RAINFALL INTO NEXT WEEK. A SLIGHT COOLING TREND OF TEMPS WILL OCCUR ACROSS THE SOUTH DUE TO INCREASED CLOUD COVER/MOISTURE...THOUGH THE NORTH WILL REMAIN NEAR STATUS-QUO ON THE DRY SIDE OF THE HIGH. RUN TO RUN AND MODEL TO MODEL CONSISTENCY BREAKS DOWN IN DETAIL MIDWEEK OF NEXT WEEK...BUT SOME HINT EXISTS THAT AS THE RIDGE BULGES EAST AN INVERTED TROUGH WILL EVENTUALLY LIFT NORTH THROUGH NEVADA BRINGING A THREAT OF STORMS TO ALL AREAS EITHER THURSDAY OR FRIDAY. NEED TO SEE MORE CONSISTENCY BEFORE CONFIDENCE IN THIS INCREASES...BUT DID ADD SOME SLIGHT CHANCE POPS FOR THE LATTER PERIODS. && .AVIATION...LIGHT NORTH WINDS ARE EXPECTED AT THE KSLC TERMINAL THROUGH ABOUT 00-01Z BEFORE SWITCHING BACK TO SOUTHEASTERLY. WINDS COULD BE OCCASIONALLY LIGHT AND VARIABLE DURING THIS TIME. VFR CONDITIONS WILL PREVAIL. && .FIRE WEATHER...A RIDGE OF HIGH PRESSURE WILL SEPARATE THE MONSOONAL MOISTURE ACROSS THE SOUTH AND A DRIER MORE STABLE AIRMASS TO THE NORTH THROUGH EARLY NEXT WEEK. TEMPERATURES WILL BE UNIFORM ACROSS THE STATE OR BEGIN TO BECOME WARMER ACROSS THE NORTH THAN THE SOUTH. FOR THE REST OF TODAY...RH VALUES ARE STILL QUITE DRY ACROSS THE STATE WITH THE EXCEPTION OF FAR SOUTHWEST UTAH. A BETTER CHANCE EXISTS FOR CONVECTION SOUTH OF INTERSTATE 70 WHICH SHOULD MAINLY BE WET EXCEPT FOR ISOLATED DRY CONVECTION ACROSS THE SOUTHEAST VALLEYS. ACROSS THE NORTH...CONVECTION HAS INITIATED ALONG THE SPINE OF THE CENTRAL AND NORTHEAST MOUNTAINS. ANY ACTIVITY THAT DRIFTS EAST INTO THE NORTHEAST VALLEYS WILL BE LIKELY BE DRY. LIGHTNING AND GUSTY WINDS ARE THE PRIMARY THREATS WITH ACTIVITY ACROSS THE NORTHERN AND EASTERN VALLEYS...WITH LOCALLY HEAVY RAINFALL POSSIBLE ACROSS SOUTHWEST UTAH. THE MOISTURE ADVANCES NORTH TO ABOUT INTERSTATE 70 TOMORROW. RH VALUES WILL RESPOND BY INCREASING ACROSS THE SOUTH ALONG WITH MORE EXPANSIVE CLOUD COVER...WHERE LOCALLY HEAVY RAINFALL WILL ALSO BE POSSIBLE. ISOLATED DRY CONVECTION POSSIBLE ACROSS THE NORTHERN VALLEYS. THE RIDGE POSITION LOOKS TO REMAIN FAIRLY STEADY INTO EARLY NEXT WEEK...MAINTAINING SIMILAR WEATHER THROUGH ABOUT TUESDAY. THE RIDGE LOOKS TO WEAKEN DURING THE SECOND HALF OF NEXT WEEK. THIS SHOULD ALLOW AN INFLUX OF DEEPER MOISTURE NORTHWARD. ACROSS THE NORTH...TEMPERATURES WILL COOL WITH RISING HUMIDITY. CLOUD COVER SHOULD BECOME MORE EXPANSIVE WITH A GREATER CHANCE FOR A WETTING RAIN/LOCALLY HEAVY RAINFALL ACROSS THE NORTH. && .SLC WATCHES/WARNINGS/ADVISORIES... UT...NONE. WY...NONE. && MERRILL/WILENSKY/ROGOWSKI 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 601 AM MDT FRI JUL 4 2014 UTZ001>016-019>021-517-518-WYZ021-051200- 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- 601 AM MDT FRI JUL 4 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN TWO THIRDS OF UTAH AND SOUTHWEST WYOMING. .DAY ONE...TODAY AND TONIGHT ISOLATED THUNDERSTORMS CAPABLE OF PRODUCING DANGEROUS LIGHTNING AND STRONG GUSTY WINDS CAN BE EXPECTED THIS AFTERNOON AND EVENING ACROSS THE HIGHER TERRAIN OF THE OUTLOOK AREA. TEMPERATURES 5 TO 10 DEGREES ABOVE NORMAL CAN BE EXPECTED ACROSS THE OUTLOOK AREA ONCE AGAIN TODAY AS HIGH PRESSURE STRENGTHENS ACROSS THE REGION. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY HIGH PRESSURE WILL MAINTAIN ABOVE NORMAL TEMPERATURES ACROSS THE OUTLOOK AREA THROUGH THE HOLIDAY WEEKEND. AFTERNOON AND EVENING THUNDERSTORMS CAN BE EXPECTED THROUGH THE WEEKEND AND INTO EARLY NEXT WEEK...WITH THE GREATEST THREAT COMING ACROSS SOUTHERN UTAH. DANGEROUS LIGHTNING AND STRONG GUSTY WINDS WILL BE THE MAIN IMPACTS FROM THESE STORMS...WITH LOCALLY HEAVY RAINFALL BECOMING AN INCREASING THREAT OVER 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 ROAD TRAVEL IMPACTS VISIT... HTTP://WWW.UDOTTRAFFIC.UTAH.GOV/ROADWEATHERFORECAST.ASPX
The Cedar City radar (KICX), 43 km away, was scanning. The volume nearest the first event began at 02:18 UTC.
2 flash flood. Local standard time, as filed.
Flash flooding occurred in Zion National Park, with the river gauge at the North Fork of the Virgin River rising to 253 cfs. Park rangers reported that Behunin Canyon, Heaps Canyon, and Pine Creek all experienced flash flooding.
Flash flooding occurred primarily in Pine Creek in Zion National Park. Flows rose to 500 cfs, and the national park recorded the flood on video.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Utah in 2014Every state in 2014This day in weather historyWarnings in Utah, July 2014
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: 535881, 535884.