Additional moisture moved into Utah in early September, helping to initiate scattered showers and thunderstorms, with some reports of flash flooding on the 5th through 7th. This moisture intensified on the 8th and 9th, as deeper moisture associated with Tropical Storm Norbert moved over the state, producing more widespread flooding.
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.
Additional moisture moved into Utah in early September, helping to initiate scattered showers and thunderstorms, with some reports of flash flooding on the 5th through 7th. This moisture intensified on the 8th and 9th, as deeper moisture associated with Tropical Storm Norbert moved over the state, producing more widespread flooding.
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 5, 3:01 PM MST, 39 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SALT LAKE CITY UT 401 PM MDT FRI SEP 5 2014 .SYNOPSIS...SOUTHWESTERLY FLOW ALOFT WITH LIMITED MOISTURE WILL PERSIST OVER THE REGION THROUGH SATURDAY. TROPICAL MOISTURE WILL SURGE NORTH SUNDAY NIGHT THROUGH TUESDAY AND MOST PROLIFIC ACROSS CENTRAL AND SOUTHERN UTAH. && .DISCUSSION...AFTERNOON H5 ANALYSIS CONTINUES TO INDICATE A WEAK DEFORMATION AXIS STRETCHING FROM SOUTHERN IDAHO WEST TO NORCAL ASSOCIATED WITH A PERSISTENT PACIFIC TROUGH CLOSING OFF COUPLED WITH AN ELONGATED HIGH CENTERED NEAR THE TEXAS PANHANDLE. BENEATH THIS DEFORMATION SUBTLE BAROCLINICITY EXISTS ACROSS FAR NORTHERN UTAH AND CAN BE NOTED AS A THIN W-E ORIENTED ZONE OF COOLING CLOUD TOPS ON CURRENT IR SATELLITE. COINCIDENT WITH BOTH IS A SHARP MOISTURE GRADIENT NOTED BY MESOANALYSIS WITH PWAT VALUES TRENDING DOWN FROM .8 INCHES VICINITY KSLC TO .4 INCHES AT THE UT/NV/ID TRIPLE POINT. SOUTH OF THIS AXIS DEEPER MOISTURE EXISTS WITH BULK OF SURFACE DEWPOINTS IN THE 40S AND LOW 50S AND PWATS IN THE .8 TO .9 INCH RANGE. SCATTERED CONVECTION HAS SPARKED ALONG AND EAST OF THE MOUNTAIN SPINE FROM THE UINTAS TO THE SOUTHERN MOUNTAINS. IN GENERAL CONVECTION HAS BEEN RELATIVELY SHALLOW BUT FURTHER MOISTENING OF THE LOWER LEVELS OVER THE LAST 12 HOURS HAS ALLOWED FOR ISOLATED MODERATE TO HEAVY RAINERS. GREATEST CONCERN AREAS FOR ISOLATED FLASH FLOODING THIS AFTERNOON/EVE EXISTS FROM ESCALANTE NORTH THROUGH CAPITOL REEF AS THESE LOCALES ARE DOWNWIND OF TERRAIN WHERE THE INITIAL UPDRAFTS HAVE FORMED AND MODERATE INSTABILITY EXISTS EVEN OVER THE DESERTS. THIS THREAT WILL DIMINISH OVER THE NEXT SEVERAL HOURS. NOT EXPECTING MUCH CONVECTION FROM THE BAROCLINIC ZONE IN THE NORTH AS ENVIRONMENT REMAINS FAIRLY MOISTURE STARVED. THIS SAID...HIGH PRESSURE AXIS IS EXPECTED TO BULGE NORTH SHIFTING THE DEFORMATION FURTHER NORTH OVERNIGHT AND ALLOWING DEEPER MOISTURE TO SPREAD INTO THE NORTHWEST AS WELL. LOSS OF HEATING SHOULD SQUELCH CONVECTION AS ALL LIFTING MECHANISMS SHIFT NORTH OF THE AREA BUT COULD SEE SOME ISOLATED CELLS AS FAR NORTH AS ABOUT OGDEN. ADVECTION OF DRYER AIR INTO THE SOUTHWEST TONIGHT WILL SLOWLY SPREAD NORTH TOMORROW BUT WILL MAINTAIN ISOLATED VALLEY AND SCATTERED CONVECTIVE POTENTIAL ACROSS THE NORTHEAST THROUGH TOMORROW. FOCUS SHIFTS TO THE EVOLUTION OF NOW HURRICANE NORBERT AND THE ASSOCIATED TROPICAL MOISTURE TAP IT WILL CARRY TO ITS NORTH AND EAST EARLY NEXT WEEK. 12Z ECMWF/GFS CONTINUE TO DISAGREE ON THE EVOLUTION OF NORBERTS REMNANT CIRCULATION CENTER DURING THAT TIME WITH THE FORMER KEEPING IT OFFSHORE OF SOCAL AND THE LATTER OPENING IT UP THROUGH SOCAL/WESTERN ARIZONA. REGARDLESS OF THESE RELATIVELY LARGE DIFFERENCES REGARDING THE CIRCULATION THE GLOBAL MODELS AGREE ON THE ASSOCIATED TROPICAL SURGE SPREADING NORTH INTO AT LEAST CENTRAL UTAH SUNDAY NIGHT THROUGH MONDAY...WITH CONVERGENT FLOW FROM THIS SURGE AND THE UPSTREAM PACIFIC TROUGH SETTING UP OVER CENTRAL UTAH THROUGH TUESDAY. DURING THAT TIME RUN TOTAL QPF FOR PORTIONS OF CENTRAL AND SOUTHERN UTAH RANGE IN THE 1 TO 3 INCH RANGE FROM A PROLONGED PERIOD OF MODERATE AND MOSTLY STRATIFORM RAINFALL. WILL CONTINUE TO MONITOR THIS OVER THE NEXT SEVERAL SHIFTS AS DETAILS BECOME MORE NOTED. AFOREMENTIONED PACIFIC TROUGH WILL FILL AND LIFT THROUGH THE NORTHERN GREAT BASIN MIDWEEK ALLOWING A DRYING NORTHWEST FLOW TO SET UP FOR THE END OF THE WEEK...THIS AS HIGH PRESSURE BUILDS NORTH ALONG THE PACIFIC COAST IN RESPONSE. && .AVIATION...NORTHWEST SURFACE WINDS ARE EXPECTED TO PERSIST AT THE KSLC TERMINAL THROUGH 03/04Z...BUT A 20 PERCENT CHANCE EXISTS FOR SOUTHERLY OUTFLOW FROM ISOLATED STORMS DEVELOPING OFF THE OQUIRRH MOUNTAINS THROUGH THAT TIME. THIS WILL REMAIN THE PRIMARY OPERATIONAL WEATHER CONCERN IN THE TAF AS VFR CONDITIONS ARE EXPECTED TO BE MAINTAINED. && .FIRE WEATHER...SHOWERS AND THUNDERSTORMS WILL CONTINUE TO DEVELOP ACROSS CENTRAL AND SOUTHERN UTAH INTO THE EVENING...WITH SOME STORMS CONTINUING OVERNIGHT. STORMS WILL BECOME MORE WIDESPREAD DURING THE AFTERNOON HOURS ON BOTH TOMORROW AND SUNDAY. TROPICAL MOISTURE WILL MOVE INTO THE STATE OVERNIGHT SUNDAY...BRINGING THE POTENTIAL FOR WIDESPREAD...STEADY RAIN ACROSS CENTRAL AND SOUTHERN UTAH MONDAY AND TUESDAY. && .SLC WATCHES/WARNINGS/ADVISORIES... UT...NONE. WY...NONE. && MERRILL/HOSENFELD 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 306 AM MDT FRI SEP 5 2014 UTZ001>016-019>021-517-518-WYZ021-061300- 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- 306 AM MDT FRI SEP 5 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN TWO THIRDS OF UTAH AND SOUTHWEST WYOMING. .DAY ONE...TODAY AND TONIGHT ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS ARE FORECAST TODAY. THE STRONGEST ACTIVITY WILL BE CAPABLE OF PRODUCING LOCALLY HEAVY RAINFALL AND GUSTY WINDS. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY THUNDERSTORM CHANCES WILL DIMINISH SATURDAY...ONLY TO INCREASE AGAIN SUNDAY. MONDAY AND TUESDAY APPEAR TO HAVE THE GREATEST RISK OF HEAVY RAINFALL...AND FLASH FLOODING WILL BE POSSIBLE. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. ROGOWSKI 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), 111 km away, was scanning. The volume nearest the first event began at 22:38 UTC.
8 flash flood. Local standard time, as filed.
Flash flooding was reported along Harris Wash, with a few hikers becoming briefly stranded due to the flooding. A few roads near Hole-in-the-Rock Road were also washed out by the flood waters.
Park rangers in Capitol Reef National Park reported flash flooding along Pleasant Creek.
Widespread flash flooding occurred in Capitol Reef National Park, including a 3 foot rise of water in Sulphur Creek, water 1.5 feet deep in Grand Wash, and water flowing over State Route 24, with several waterfalls along the highway.
Flash flooding occurred in several drainages in Zion National Park, including Behunin Canyon, Heaps Canyon, and several other canyons in the park. In addition, waterfalls were reported over most of the western end of the park.
Heavy rain over the Clay Springs burn scar caused a minor debris flow, sending rocks and debris onto State Route 125.
Minor flash flooding was reported in Gould's Wash near Quail Creek Reservoir.
Flash flooding was widespread across Washington county, including flooding reported in the cities of St. George, Washington, and Ivins. The most common flooding occurred in washes and city streets, with several areas experiencing over a foot of water flowing through the streets. Approximately 15 homes were flooded in the St. George area, and a few homes were damaged in Ivins. Flooding also damaged parts of the Southgate Golf Course in St. George. Many parts of Zion National Park experienced flooding, and the park actually shut down for part of the day when mud, debris, and a large boulder slid onto State Route 9, blocking traffic. The North Fork of the Virgin River rose to 4,790 cfs, the 7th highest recorded flow in the river in the last 100 years.
Significant flash flooding was reported in several drainages across Kane County, including Warm Creek and Wahweap Creek. The Paria River rose to 1,519 cfs at the southern end of the river, with widespread flash flooding around the headwaters of the Paria due to widespread, long-duration rainfall.
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, September 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: 543745, 543742, 543743, 543746, 543747, 543748, 543759, 543753.