Very heavy rains from a tropical airmass resulted in flooding of roads.
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.
Very heavy rains from a tropical airmass resulted in flooding of roads.
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 Aug 13, 2:30 PM MST, 4 hours earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SALT LAKE CITY UT 330 PM MDT MON AUG 13 2007 .SYNOPSIS...HIGH PRESSURE TO OUR EAST WILL KEEP A SOMEWHAT MOIST SOUTH TO SOUTHWEST FLOW OVER THE REGION THROUGH THE WEEK. && .DISCUSSION...THE LARGE SCALE PATTERN WITH THE HIGH CENTERED OVER THE WESTERN PLAINS AND A TROF OFF THE WEST COAST WILL REMAIN PRETTY MUCH UNCHANGED FOR THE NEXT SEVERAL DAYS. MOISTURE HAS SPREAD BACK NORTH INTO UT ON THE SOUTHERLY FLOW AND THE LOW LEVELS MOISTENED DRAMATICALLY YESTERDAY. DEWPOINTS HAVE FALLEN AGAIN TODAY OVER THE WEST AS THE MID LEVEL FLOW VEERED A BIT BUT THE AIRMASS IS MORE UNSTABLE AND THE COVERAGE OF CONVECTION IS MUCH GREATER OVER THE MTNS AND EAST. WE COULD STILL SEE ISOLATED HIGH BASED CELLS DEVELOP OVER THE WEST TONIGHT BUT THE CHANCES OF THIS HAPPENING ARE LOW. THE MOISTURE DISTRIBUTION WILL NOT CHANGE MUCH NEXT 48-60 HRS OR SO AND WEAK VORT FEATURES ROTATING AROUND THE HIGH WILL DETERMINE HOW ACTIVE EACH DAY IS ALTHO COVERAGE SHOULD INCREASE OVER THE WEST AFTER TOMORROW AS THE FLOW ALOFT BECOMES LIGHTER AND ALLOWS THE MOISTURE TO SPREAD WESTWARD. TEMPS WILL STAY WARM OVER THE WEST NEXT COUPLE OF DAYS BUT SHOULD COOL A BIT OVER THE EAST WITH THE INCREASED CLOUD COVER AND MOISTURE. EXPECT A BIT OF COOLING WEST STARTING WED. MODELS BRINGING A COOL TROF INTO THE NORTHWESTERN STATES THIS WEEKEND THAT VEERS THE FLOW OVER UT TO MORE WESTERLY AND STARTS TO DRY US OUT. THIS DRYING TREND ENDS MON AS THE MOISTURE MOVES OUT AND A WEAK COOL FRONT SAGS INTO THE N. HAVE LEFT TOKEN POPS IN THE FORECAST FOR NOW DUE TO LOW CONFIDENCE THAT FAR OUT. && .AVIATION...GUSTY SOUTH WINDS WILL CONTINUE AT THE KSLC TERMINAL UNTIL AROUND 2300 UTC WHEN THE NORTHWESTERLY LAKE BREEZE IS EXPECTED TO MOVE THROUGH THE TERMINAL. THERE IS A 20 PERCENT CHANCE THAT THE LAKE BREEZE WILL NOT MOVE THROUGH THE TERMINAL AT ALL. THERE IS ALSO A 20 PERCENT CHANCE THAT THE TERMINAL WILL BE IMPACTED BY ERRATIC GUSTY OUTFLOW WINDS FROM THUNDERSTORMS IN THE AREA THIS EVENING. && .FIRE WEATHER...SCATTERED THUNDERSTORMS WILL CONTINUE TO DEVELOP OVER SOUTHERN AND EASTERN UTAH THROUGH THIS EVENING IN RESPONSE TO A WEAK DISTURBANCE MOVING INTO THE AREA FROM NORTHEAST ARIZONA. WETTING RAINFALL IS POSSIBLE UNDERNEATH THE STRONGER STORMS. OVER THE NORTHWEST...ONLY ISOLATED CONVECTION IS EXPECTED DUE TO THE LACK OF FORCING. ALSO...ANY THUNDERSTORMS THAT DEVELOP IN THAT AREA TONIGHT WILL LIKELY BE DRY AND PRODUCE GUSTY OUTFLOW WINDS AS PRECIPITABLE WATER IS LOWER THERE. MORE OF THE SAME CAN BE EXPECTED TOMORROW BEFORE MOISTURE SPREADS FARTHER INTO NORTHERN UTAH FOR THE MIDDLE OF THE WEEK. CHANCES OF WETTING RAINFALL WILL INCREASE THROUGH AT LEAST MIDWEEK WITH HUMIDITIES GRADUALLY TRENDING UPWARD. WINDS WILL GENERALLY BE LIGHT FOR THE NEXT FEW DAYS OUTSIDE OF THUNDERSTORMS. && .SLC WATCHES/WARNINGS/ADVISORIES... UT...NONE. WY...NONE. && WILENSKY/GRAHAM/CHENG FOR MORE INFORMATION FROM NOAA/S NATIONAL WEATHER SERVICE VISIT... HTTP://WEATHER.GOV/SALTLAKECITY (ALL LOWER CASE)
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SALT LAKE CITY UT 554 AM MDT MON AUG 13 2007 UTZ001>016-019>021-517-518-WYZ021-141200- 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- 554 AM MDT MON AUG 13 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN TWO THIRDS OF UTAH ALONG WITH FAR SOUTHWEST WYOMING. .DAY ONE...TODAY AND TONIGHT INCREASING MOISTURE WILL ALLOW FOR SCATTERED AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS...PRIMARILY ACROSS CENTRAL AND SOUTHERN PORTIONS OF THE OUTLOOK AREA. DANGEROUS CLOUD TO GROUND LIGHTNING...GUSTY WINDS AND LOCALLY HEAVY RAINFALL WILL BE POSSIBLE. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY A THREAT OF THUNDERSTORMS WILL EXIST THROUGH THE PERIOD...AS MOISTURE REMAINS IN PLACE ACROSS THE AREA. HEAVY RAIN WILL BE POSSIBLE WITH THE STRONGEST STORMS...WHICH MAY LEAD TO ISOLATED INCIDENTS OF FLASH FLOODING. THIS WILL BE MOST LIKELY ACROSS SOUTHERN UTAH. OTHERWISE DANGEROUS CLOUD TO GROUND LIGHTNING AND GUSTY WINDS CAN BE EXPECTED. .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)
The Cedar City radar (KICX), 165 km away, was scanning. The volume nearest the first event began at 01:32 UTC.
3 heavy rain, 1 flash flood. Local standard time, as filed.
Grand Wash Road was closed due to flooding. Radar estimated a storm total of 1 to 1.3 inches from 2 pm to 7 pm.
Radar estimated 1 to 1.5 inches of rainfall. Town facilities were called out to remove mud from the road shoulders.
Mud debris on RT 24 required removal with equipment.
Two storms accumulated nearly 1.25 inches of total rainfall.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Utah in 2007Every state in 2007This day in weather historyWarnings in Utah, August 2007
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: 55540, 55541, 55542, 55543.