Thunderstorms brought locally heavy rainfall and flash flooding across portions of southern Utah, including Escalante and Capitol Reef National Park. Later that evening, a thunderstorm moved into western Salt Lake County and produced severe wind gusts.
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 brought locally heavy rainfall and flash flooding across portions of southern Utah, including Escalante and Capitol Reef National Park. Later that evening, a thunderstorm moved into western Salt Lake County and produced severe wind gusts.
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 4, 2:10 PM MST, 1 hour 2 minutes earlier.
Area Forecast Discussion National Weather Service Salt Lake City UT 310 PM MDT Sun Aug 4 2019 .SYNOPSIS...High pressure over the Four Corners will shift west into Arizona tonight, bringing a drying trend through Tuesday morning. As the ridge returns east by Wednesday, moisture will return for the latter half of the work week. && .SHORT TERM (Through 00Z Thursday)...Center of the ridge remains over the Four Corners this afternoon, keeping a moist airmass over Utah and southwest Wyoming. Satellite derived PWs are predominately in the 0.8 to 1.0 inch range, with some higher values over eastern Utah. Earlier cloud cover has diminished, allowing for showers and thunderstorms to develop in this moist airmass, primarily over the higher terrain. Any storms that develop have the potential to produce heavy rain that could lead to flash flooding. Shortwave energy moving over northwest Utah will allow for some additional storms over that area through the early evening. Maxes are generally running near to just above seasonal normals across the area. The ridge will retreat west tonight into early tomorrow, with the axis moving over Utah. As a result, the flow aloft will become more westerly, allowing drier air to move into the forecast area. PWs are anticipated to drop into the 0.6 to 0.8 inch range by Tuesday morning. Though enough moisture will exist for some afternoon/evening convection over the higher terrain, coverage will be noticeably less than the past few days. High pressure is then expect to move back east over the Four Corners beginning late Tuesday, bringing monsoon moisture back northward and allowing coverage of showers and thunderstorms to ramp back up for Wednesday. Have increased POPs a bit for Wednesday afternoon with increasing confidence. Increasing cloud cover will also drop high temperatures slightly, with maxes running near seasonal normals. .LONG TERM (After 00Z Thursday)...The southern Rockies ridge will remain in place to start the long term forecast period. On the western periphery of this ridge...a shortwave will progress northeastward across eastern Nevada/western Utah Wednesday into Thursday. Operational/ensemble model solutions vary in positioning of this shortwave which will ultimately have a large impact on convective coverage across Utah. For now trended toward an ensemble approach...with higher pops than the operational EC would warrant. While net drying is expected across the CWA in the wake of the Thursday wave...expect higher terrain to continue to support convection into at least Friday and potentially the weekend. Coverage will gradually decrease as mid-level dry air advection continues. && .AVIATION...Southeasterly winds at the SLC terminal are expected to shift to the northwest between 21-22Z. There is a 40 percent chance winds will remain southerly or light and variable through the afternoon and into the evening. The threat of gusty and erratic winds from thunderstorms will continue through 02-03Z. && .FIRE WEATHER...High pressure over the Four Corners will retreat west beginning tonight, bringing a drying trend to the area through Tuesday morning. The ridge will move back east over the Four Corners starting Tuesday night, allowing moisture to return. This will result in increasing coverage of showers and thunderstorms for the middle to latter part of the work week. Temperatures will be near to just above seasonal normals with generally light and terrain driven winds. && .SLC WATCHES/WARNINGS/ADVISORIES... UT...None. WY...None. && SHORT TERM/FIRE WEATHER...Traphagan LONG TERM/AVIATION...Kruse For more information from NOAA's National Weather Service visit... http://weather.gov/saltlakecity For frequently asked questions about the Area Forecast Discussion visit... http://weather.gov/saltlakecity/general/afd_faqs.php
Hazardous Weather Outlook National Weather Service Salt Lake City UT 549 AM MDT Sun Aug 4 2019 UTZ001>016-019>021-517-518-WYZ021-051300- 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- 549 AM MDT Sun Aug 4 2019 This Hazardous Weather Outlook is for the western two thirds of Utah and southwest Wyoming. .DAY ONE...Today and Tonight Moisture will remain in place across Utah today, and locally heavy rainfall will be possible. There is a risk of flash flooding, particularly near burn scars, slot canyons, normally dry washes, and areas of poor drainage. .DAYS TWO THROUGH SEVEN...Monday through Saturday The airmass will trend a bit drier for the first half of the week, but isolated to scattered showers and thunderstorms will linger. Some of the stronger storms will be capable of producing heavy rain. .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 For information on potential road travel impacts visit... http://www.udottraffic.utah.gov/roadweatherforecast.aspx
The Cedar City radar (KICX), 110 km away, was scanning. The volume nearest the first event began at 22:10 UTC.
4 flash flood, 3 thunderstorm wind, 1 heavy rain. Local standard time, as filed.
The Buck Flats RAWS recorded a rainfall total of 1.34 inches in less than an hour, leading to flash flooding around Escalante.
Pine Creek Road was washed out in several places from flash flooding.
Flash flooding produced damage at Escalante Municipal Airport.
Flash flooding occurred in and near Escalante, and along the Escalante River. The Escalante River went from 1 to 2273 CFS with the peak flood wave.
Flash flooding occurred on the Notom-Bullfrog Road, south of the intersection with Burr Trail.
The Trans-Jordan Landfill sensor recorded a peak wind gust of 64 mph.
A UDOT sensor recorded a peak wind gust of 61 mph.
The BACCUS/SR111 sensor recorded a peak wind gust of 64 mph.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Utah in 2019Every state in 2019This day in weather historyWarnings in Utah, August 2019
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: 852682, 852676, 852678, 852680, 852681, 852688, 852692, 852697.